Document:

EXHIBIT 4.1
                                  -----------

                      The Pooling and Servicing Agreement

<PAGE>

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                                INDYMAC MBS, INC.
                                    Depositor

                              INDYMAC BANK, F.S.B.
                               Seller and Servicer

                      DEUTSCHE BANK NATIONAL TRUST COMPANY
                    Trustee and Supplemental Interest Trustee

                    ----------------------------------------

                         POOLING AND SERVICING AGREEMENT
                          Dated as of November 1, 2007
                    ----------------------------------------

                        INDYMAC INDA MORTGAGE LOAN TRUST
                                    2007-AR8

                       MORTGAGE PASS-THROUGH CERTIFICATES
                                 Series 2007-AR8

================================================================================

<PAGE>

                                                 TABLE OF CONTENTS

<TABLE>
<CAPTION>

                                                                                                               Page
                                                                                                               ----
<S>                                                                                                            <C>
ARTICLE ONE DEFINITIONS..........................................................................................10

         Section 1.01      Definitions...........................................................................10
         Section 1.02      Rules of Construction.................................................................43

ARTICLE TWO CONVEYANCE OF MORTGAGE LOANS; REPRESENTATIONS AND WARRANTIES.........................................45

         Section 2.01      Conveyance of Mortgage Loans..........................................................45
         Section 2.02      Acceptance by the Trustee of the Mortgage Loans.......................................48
         Section 2.03      Representations, Warranties, and Covenants of the Seller and the Servicer.............50
         Section 2.04      Representations and Warranties of the Depositor as to the Mortgage Loans..............52
         Section 2.05      Delivery of Opinion of Counsel in Connection with Substitutions.......................52
         Section 2.06      Execution and Delivery of Certificates................................................53
         Section 2.07      REMIC Matters.........................................................................53

ARTICLE THREE ADMINISTRATION AND SERVICING OF MORTGAGE LOANS.....................................................54

         Section 3.01      Servicer to Service Mortgage Loans....................................................54
         Section 3.02      [Reserved]............................................................................55
         Section 3.03      Rights of the Depositor and the Trustee in Respect of the Servicer....................55
         Section 3.04      [Reserved]............................................................................55
         Section 3.05      Trustee to Act as Servicer............................................................55
         Section 3.06      Collection of Mortgage Loan Payments; Certificate Account; Distribution Account;
                           Swap Account; Collateral Account......................................................55
         Section 3.07      Collection of Taxes, Assessments and Similar Items; Escrow Accounts...................59
         Section 3.08      Access to Certain Documentation and Information Regarding the Mortgage Loans..........59
         Section 3.09      Permitted Withdrawals from the Certificate Account, the Distribution Account and the
                           Swap Account..........................................................................60
         Section 3.10      Maintenance of Hazard Insurance; Maintenance of Primary Insurance Policies............61
         Section 3.11      Enforcement of Due-On-Sale Clauses; Assumption Agreements.............................62
         Section 3.12      Realization Upon Defaulted Mortgage Loans.............................................63
         Section 3.13      Trustee to Cooperate; Release of Mortgage Files.......................................65
         Section 3.14      Documents, Records and Funds in Possession of the Servicer to be Held for the Trustee.66
         Section 3.15      Servicing Compensation................................................................66
         Section 3.16      Access to Certain Documentation.......................................................67
         Section 3.17      Annual Statement as to Compliance.....................................................67
         Section 3.18      Errors and Omissions Insurance; Fidelity Bonds........................................67
         Section 3.19      The Swap Contract.....................................................................67
         Section 3.20      Notification of Adjustments...........................................................69
         Section 3.21      Prepayment Charges....................................................................69
         Section 3.22      Late Payment Fees.....................................................................70

                                                         i

<PAGE>

ARTICLE FOUR DISTRIBUTIONS AND ADVANCES BY THE SERVICER..........................................................71

         Section 4.01      Advances..............................................................................71
         Section 4.02      Priorities of Distribution............................................................72
         Section 4.03      Cross-Collateralization; Adjustments to Available Funds...............................76
         Section 4.04      [Reserved]............................................................................77
         Section 4.05      Allocation of Realized Losses.........................................................77
         Section 4.06      Monthly Statements to Certificateholders..............................................78
         Section 4.07      Determination of Pass-Through Rates for LIBOR Certificates............................81
         Section 4.08      Supplemental Interest Trust...........................................................82

ARTICLE FIVE THE CERTIFICATES....................................................................................83

         Section 5.01      The Certificates......................................................................83
         Section 5.02      Certificate Register; Registration of Transfer and Exchange of Certificates...........83
         Section 5.03      Mutilated, Destroyed, Lost or Stolen Certificates.....................................88
         Section 5.04      Persons Deemed Owners.................................................................88
         Section 5.05      Access to List of Certificateholders' Names and Addresses.............................88
         Section 5.06      Maintenance of Office or Agency.......................................................89

ARTICLE SIX THE DEPOSITOR AND THE SERVICER.......................................................................90

         Section 6.01      Respective Liabilities of the Depositor and the Servicer..............................90
         Section 6.02      Merger or Consolidation of the Depositor or the Servicer..............................90
         Section 6.03      Limitation on Liability of the Depositor, the Seller, the Servicer, and Others........90
         Section 6.04      Limitation on Resignation of the Servicer.............................................91

ARTICLE SEVEN DEFAULT............................................................................................92

         Section 7.01      Events of Default.....................................................................92
         Section 7.02      Trustee to Act; Appointment of Successor..............................................93
         Section 7.03      Notification to Certificateholders....................................................94

ARTICLE EIGHT CONCERNING THE TRUSTEE.............................................................................96

         Section 8.01      Duties of the Trustee.................................................................96
         Section 8.02      Certain Matters Affecting the Trustee.................................................96
         Section 8.03      Trustee Not Liable for Certificates or Mortgage Loans.................................98
         Section 8.04      Trustee May Own Certificates..........................................................98
         Section 8.05      Trustee's Fees and Expenses...........................................................98
         Section 8.06      Eligibility Requirements for the Trustee..............................................99
         Section 8.07      Resignation and Removal of the Trustee................................................99
         Section 8.08      Successor Trustee....................................................................100
         Section 8.09      Merger or Consolidation of the Trustee...............................................101
         Section 8.10      Appointment of Co-Trustee or Separate Trustee........................................101
         Section 8.11      Tax Matters..........................................................................102

                                                        ii

<PAGE>

ARTICLE NINE TERMINATION........................................................................................105

         Section 9.01      Termination upon Liquidation or Purchase of the Mortgage Loans.......................105
         Section 9.02      Final Distribution on the Certificates...............................................106
         Section 9.03      Additional Termination Requirements..................................................107
         Section 9.04      Termination of the Supplemental Interest Trust.......................................107

ARTICLE TEN MISCELLANEOUS PROVISIONS............................................................................108

         Section 10.01     Amendment............................................................................108
         Section 10.02     Recordation of Agreement; Counterparts...............................................109
         Section 10.03     Governing Law........................................................................110
         Section 10.04     Intention of Parties.................................................................110
         Section 10.05     Notices. 110
         Section 10.06     Severability of Provisions...........................................................111
         Section 10.07     Assignment...........................................................................111
         Section 10.08     Limitation on Rights of Certificateholders...........................................111
         Section 10.09     Inspection and Audit Rights..........................................................112
         Section 10.10     Certificates Nonassessable and Fully Paid............................................112
         Section 10.11     Official Record......................................................................113
         Section 10.12     Protection of Assets.................................................................113
         Section 10.13     Qualifying Special Purpose Entity....................................................113

ARTICLE ELEVEN EXCHANGE ACT REPORTING...........................................................................113

         Section 11.01     Filing Obligations...................................................................113
         Section 11.02     Form 10-D Filings....................................................................113
         Section 11.03     Form 8-K Filings.....................................................................115
         Section 11.04     Form 10-K Filings....................................................................115
         Section 11.05     Sarbanes-Oxley Certification.........................................................117
         Section 11.06     Form 15 Filing.......................................................................118
         Section 11.07     Report on Assessment of Compliance and Attestation...................................118
         Section 11.08     Use of Subcontractors................................................................119
         Section 11.09     Amendments...........................................................................119

                                                        iii

<PAGE>

                                                     SCHEDULES

Schedule I:          Mortgage Loan Schedule...................................................................S-I-1

Schedule II:         Representations and Warranties of the Seller/Servicer...................................S-II-1

Schedule III:        Representations and Warranties as to the Mortgage Loans................................S-III-1

Schedule IV:         Reserved................................................................................S-IV-1

Schedule V:          Form of Monthly Report...................................................................S-V-1

                                                      EXHIBITS

Exhibit A:           Form of Senior Certificate................................................................A-1

Exhibit B:           Form of Subordinated Certificate...........................................................B-1

Exhibit C:           Form of Class A-R Certificate..............................................................C-1

Exhibit D:           [Reserved].................................................................................D-1

Exhibit E            Form of Reverse of Certificates............................................................E-1

Exhibit F-1:         Form of Class P Certificates.............................................................F-1-1

Exhibit F-2:         Form of Class L Certificates.............................................................F-2-1

Exhibit G-1:         Form of Initial Certification of Trustee ................................................G-1-1

Exhibit G-2:         Form of Delay Delivery Certification.....................................................G-2-1

Exhibit H:           Form of Final Certification of Trustee.....................................................H-1

Exhibit I:           Form of Transfer Affidavit.................................................................I-1

Exhibit J:           Form of Transferor Certificate.............................................................J-1

Exhibit K:           Form of Investment Letter (Non-Rule 144A)..................................................K-1

Exhibit L:           Form of Rule 144A Letter...................................................................L-1

Exhibit M:           Form of Request for Release (for Trustee)..................................................M-1

Exhibit N:           Request for Release of Documents...........................................................N-1

Exhibit O-1:         Form of Certificate to be Provided by the Depositor with Form 10-K.........................O-1

                                                        iv

<PAGE>

Exhibit O-2:         Form of Trustee's Officer's Certificate....................................................O-2

Exhibit P:           Form of Swap Contract......................................................................P-1

Exhibit Q:           Reporting Responsibility...................................................................Q-1

Exhibit R:           Form of Performance Certification (Trustee)................................................R-1

Exhibit S:           Form of Servicing Criteria to be Addressed in Assessment
                         of Compliance Statement................................................................S-1

Exhibit T:           Form of List of Item 1119 Parties..........................................................T-1

Exhibit U:           Form of Sarbanes-Oxley Certification (Replacement of Servicer).............................U-1

                                                         v
</TABLE>

<PAGE>

         THIS POOLING AND SERVICING AGREEMENT, dated as of November 1, 2007,
among INDYMAC MBS, INC., a Delaware corporation, as depositor (the "Depositor"),
IndyMac Bank, F.S.B. ("IndyMac"), a federal savings bank, as seller (in that
capacity, the "Seller") and as servicer (in that capacity, the "Servicer"), and
Deutsche Bank National Trust Company, a national banking association, as trustee
(in that capacity, the "Trustee"), and as supplemental interest trustee (in that
capacity, the "Supplemental Interest Trustee").

                           W I T N E S S E T H T H A T

         In consideration of the mutual agreements set forth in this Agreement,
the parties agree as follows:

                     P R E L I M I N A R Y S T A T E M E N T

         The Depositor is the owner of the Trust Fund that is hereby conveyed to
the Trustee in return for the Certificates. As provided in this Agreement, the
Trustee shall elect that the Trust Fund (exclusive of the Supplemental Interest
Trust, the Swap Contract, the Swap Account and any amounts in respect of waived
Prepayment Charges paid by the Servicer to the Class P-1 and Class P-2
Certificates, as applicable, pursuant to Section 3.20(b) and any amounts in
respect of waived Late Payment Fees paid by the Servicer to the Class L
Certificates pursuant to Section 3.21(b)) be treated for federal income tax
purposes as comprising three real estate mortgage investment conduits (each, a
"REMIC" or, in the alternative, "REMIC 1," "REMIC 2" and the "Master REMIC").
Each Certificate, other than the Class A-R Certificate and the uncertificated
Class IO Interest retained by Deutsche Bank Securities Inc., will represent
ownership of one or more regular interests in the Master REMIC for purposes of
the REMIC Provisions. The Class A-R represents ownership of the sole class of
residual interest in each REMIC created under this Agreement. The Master REMIC
will hold as assets the several classes of uncertificated REMIC 2 Interests
(other than the Class R-2 Interest). REMIC 2 will hold as assets the several
classes of uncertificated REMIC 1 Interests (other than the Class R-1 Interest).
REMIC 1 will hold as assets all property of the Trust Fund other than the
Supplemental Interest Trust, the Swap Contract and the Swap Account. Each REMIC
2 Interest (other than the Class R-2 Interest) is hereby designated as a regular
interest in REMIC 2. Each REMIC 1 Interest (other than the Class R-1 Interest)
is hereby designated as a regular interest in REMIC 1.

         The latest possible maturity date of all REMIC regular interests
created in this Agreement shall be the Latest Possible Maturity Date. All
amounts in respect of waived Prepayment Charges paid by the Servicer to the
Class P-1 and Class P-2 Certificates pursuant to Section 3.20(b) will be treated
as paid directly by the Servicer to the Class P-1 and Class P-2 Certificates and
not as paid by or through any REMIC created under this Agreement. All amounts in
respect of waived Late Payment Fees paid by the Servicer to the Class L
Certificates will be treated as paid directly by the Servicer to the Class L
Certificates pursuant to Section 3.21(b) and not as paid by or through any REMIC
created under this Agreement or by or through the Grantor Trust described in
this Agreement.

                                       1
<PAGE>

REMIC 1

         The REMIC 1 Regular Interests will have the initial principal balance,
Pass-Through Rates and corresponding Loan Groups as set forth in the following
table:

<TABLE>
<CAPTION>
                                                           Initial Principal
                                                           Balance or Notional     Pass-Through           Corresponding
REMIC 1 Interests                                          Amount                  Rate                   Loan Group
-----------------                                          ------                  ----                   ----------
<S>                                                        <C>                    <C>                    <C>
A-1  (0.9% of the Subordinated Portion of Loan Group 1)    (1)                    (2)                    1
B-1  (0.1% of the Subordinated Portion of Loan Group 1)    (1)                    (2)                    1
C-1  (Excess of Loan Group 1)                              (1)                    (2)                    1
A-2  (0.9% of the Subordinated Portion of Loan Group 2)    (1)                    (2)                    2
B-2  (0.1% of the Subordinated Portion of Loan Group 2)    (1)                    (2)                    2
C-2  (Excess of Loan Group 2)                              (1)                    (2)                    2
A-3 (0.9% of the Subordinated Portion of Loan  Group 3)    (1)                    (2)                    3
B-3 (0.1% of the Subordinated Portion of Loan  Group 3)    (1)                    (2)                    3
C-3 (Excess of Loan Group 3)                               (1)                    (2)                    3
1-P                                                        $100                   (3)                    N/A
1-$100                                                     $100                   (4)                    N/A
R-1                                                        (5)                    (5)                    N/A
</TABLE>

---------------
(1) Each Class A Interest will have a principal balance initially equal to 0.9%
of the Subordinated Portion of its corresponding Loan Group. Each Class B
Interest will have a principal balance initially equal to 0.1% of the the
Subordinated Portion of its corresponding Loan Group. The initial principal
balance of each Class C Interest will equal the excess of the initial aggregate
principal balance of its corresponding Loan Group over the initial aggregate
principal balances of the Class A and Class B Interests (and of the Class 1-$100
Interest, in the case of the Class C-1 Interest) corresponding to such Loan
Group.

(2) The Weighted Average Adjusted Net Mortgage Rate of the Mortgage Loans in the
corresponding Loan Group.

(3) The Class 1-P-1 and Class 1-P-2 Interests will not bear interest. The Class
1-P-1 Interests will be entitled to 100% of any Hard Prepayment Charges paid on
the Mortgage Loans. The Class 1-P-2 Interests will be entitled to 100% of any
Soft Prepayment Charges paid on the Mortgage Loans.

(4) The Weighted Average Adjusted Net Mortgage Rate of the Mortgage Loans in
Loan Group 1.

(5) The Class R-1 Interest is the sole class of residual interest in REMIC 1. It
has no principal balance and pays no principal or interest.

         On each Distribution Date, the Available Funds shall be distributed
with respect to the REMIC 1 Interests in the following manner:

(1) Interest is to be distributed with respect to each REMIC 1 Interest
according to the formulas described above;

                                       2
<PAGE>

(2) Principal Amounts and Realized Losses will be allocated to make the balances
of the Class 1-P-1, Class 1-P-2 and Class 1-$100 Interests equal to the
principal balances of the Class P-1, Class P-2 and Class A-R Certificates,
respectively, for such Distribution Date.

(3) If a Cross-Over Situation does not exist with respect to any Class of
Interests, then Principal Amounts and Realized Losses arising with respect to
each Loan Group will be allocated: first to cause the Loan Group's corresponding
Class A and Class B Interests to equal, respectively, 0.9% of the Subordinated
Portion and 0.1% of the Subordinated Portion; and second to the Loan Group's
corresponding Class C Interest;

(4) If a Cross-Over Situation exists with respect to the Class A and Class B
Interests then:

         (a) if the Calculation Rate in respect of the outstanding Class A and
         Class B Interests is less than the Subordinate Pass-Through Rate,
         Principal Relocation Payments will be made proportionately to the
         outstanding Class A Interests prior to any other distributions of
         principal from each such Loan Group; and

         (b) if the Calculation Rate in respect of the outstanding Class A and
         Class B Interests is greater than the Subordinate Pass-Through Rate,
         Principal Relocation Payments will be made proportionately to the
         outstanding Class B Interests prior to any other distributions of
         principal from each such Loan Group.

In case of either (a) or (b), Principal Relocation Payments will be made so as
to cause the Calculation Rate in respect of the outstanding Class A and Class B
Interests to equal the Subordinate Pass-Through Rate. With respect to each Loan
Group, if (and to the extent that) the sum of (a) the principal payments
comprising the Principal Amount received during the Due Period and (b) the
Realized Losses on the Mortgage Loans in that Loan Group, are insufficient to
make the necessary reductions of principal on the Class A and Class B Interests,
then interest will be added to the Loan Group's other REMIC 1 Interests that are
not receiving Principal Relocation Payments, in proportion to their principal
balances.

         (c) Unless otherwise required to achieve the Calculation Rate, the
         outstanding aggregate Class A and Class B Interests for all Loan Groups
         will not be reduced below 1% of the excess of (i) the aggregate Stated
         Principal Balances of the Mortgage Loans as of the end of any Due
         Period (reduced by any Principal Prepayments received after the Due
         Period that are to be distributed on the Distribution Date related to
         the Due Period)over (ii) the Certificate Balance of the Senior
         Certificates (excluding the Class A-R Certificates) for all Certificate
         Groups as of the related Distribution Date (after taking into account
         distributions of principal on such Distribution Date).

If (and to the extent that) the limitation in paragraph (c) prevents the
distribution of principal to the Class A and Class B Interests of a Loan Group,
and if the Loan Group's Class C Interest has already been reduced to zero, then
the excess principal from that Loan Group will be paid to the Class C Interests
of the other Loan Group, the aggregate Class A and Class B Interests of which
are less than 1% of the Subordinated Portion. If the Mortgage Loans in the Loan
Group of the Class C Interest that receives such payment has a Weighted Average
Adjusted Net Mortgage Rate below the Weighted Average Adjusted Net Mortgage Rate
of the Loan Group making the payment, then the payment will be treated by the
REMIC 1 as a Realized Loss. Conversely, if the Loan Group of the Class C
Interest that receives such payment has a Weighted Average Adjusted Net Mortgage
Rate above the Weighted Average Adjusted Net Mortgage Rate of the Loan Group
making the payment, then the payment will be treated by the REMIC 1 as a
reimbursement for prior Realized Losses.

                                       3
<PAGE>

REMIC 2

         The REMIC 2 Regular Interests will have the initial principal balance,
Pass-Through Rates and corresponding Loan Groups as set forth in the following
table:

<TABLE>
<CAPTION>
                                      Initial Principal                                 Corresponding Class of
         REMIC 2 Interests            Balance                  Pass-Through Rate      Certificates or Component
         -----------------            -------                  -----------------      -------------------------
<S>                                   <C>                      <C>                    <C>
            Class 2-1-A-1             (1)                       Variable(2)               Class 1-A-1, Class IO
                                                                                                Interest
            Class 2-1-A-2             (1)                       Variable(2)                    Class 1-A-2
            Class 2-2-A-1             (1)                       Variable(3)               Class 2-A-1, Class IO
                                                                                                Interest
            Class 2-2-A-2             (1)                       Variable(3)                    Class 2-A-2
            Class 2-3-A-1             (1)                       Variable(4)               Class 3-A-1, Class IO
                                                                                                Interest
            Class 2-3-A-2             (1)                       Variable(4)                    Class 3-A-2
             Class 2-$100             (1)                       Variable(2)                     Class A-R
             Class 2-B-1              (1)                       Variable(5)                     Class B-1
             Class 2-B-2              (1)                       Variable(5)                     Class B-2
             Class 2-B-3              (1)                       Variable(5)                     Class B-3
             Class 2-B-4              (1)                       Variable(5)                     Class B-4
             Class 2-B-5              (1)                       Variable(5)                     Class B-5
             Class 2-B-6              (1)                       Variable(5)                     Class B-6
            Class 2-P-1               $100                            (6)                      Class P-1
            Class 2-P-2               $100                            (6)                      Class P-2
             Class R-2                (7)                             (7)                         N/A
</TABLE>

(1) On each Distribution Date, Realized Losses and payments of principal will be
allocated to each REMIC 2 Regular Interest in the same amounts as they are
allocated to their Corresponding Class of Certificates.

(2) These Interests will bear interest during each Accrual Period for any
Distribution Date at a per annum rate equal to the Weighted Average Adjusted Net
Mortgage Rate of the Group 1 Mortgage Loans as of that Distribution Date.

(3) These Interests will bear interest during each Accrual Period for any
Distribution Date at a per annum rate equal to the Weighted Average Adjusted Net
Mortgage Rate of the Group 2 Mortgage Loans as of that Distribution Date.

(4) These Interests will bear interest during each Interest Accrual Period for
any Distribution Date at a per annum rate equal to the Weighted Average Adjusted
Net Mortgage Rate of the Group 3 Mortgage Loans as of that Distribution Date.

(5) The Pass-Through Rate for each such Class for each Interest Accrual Period
for any Distribution Date will be a per annum rate equal to the Calculation
Rate.

(6) The Class 2-P-1 and Class 2-P-2 Interests will not bear interest. The Class
2-P-1 Interests will be entitled to 100% of any Prepayment Charges paid on the
Class P-1 Certificates. The Class 2-P-2 Interests will be entitled to 100% of
any Prepayment Charges paid on the Class P-2 Certificates.

                                       4
<PAGE>

(7) The Class R-2 Interest is the sole class of residual interest in REMIC 2. It
has no principal balance and pays no principal or interest.

                                The Master REMIC

         The following table sets forth characteristics of the Certificates,
together with the minimum denominations and integral multiples in excess thereof
in which such Classes shall be issuable (except that one Certificate of the
Class B-4, Class B-5 and Class B-6 Certificates may be issued in a different
amount):

<TABLE>
<CAPTION>
   ======================= ======================== ===================== ==================== ========================
                                Initial Class           Pass-Through            Minimum         Integral Multiples in
     Class Designation       Certificate Balance            Rate             Denomination         Excess of Minimum
   ----------------------- ------------------------ --------------------- -------------------- ------------------------
<S>                          <C>                       <C>                  <C>                 <C>
          Class A-1          $     518,092,000         Floating(1)          $      25,000                 $1
   ----------------------- ------------------------ --------------------- -------------------- ------------------------
         Class 1-A-2         $      75,940,000         Variable(2)          $      25,000                 $1
   ----------------------- ------------------------ --------------------- -------------------- ------------------------
         Class 2-A-2         $      29,073,000         Variable(3)          $      25,000                 $1
   ----------------------- ------------------------ --------------------- -------------------- ------------------------
         Class 3-A-2         $      56,243,000         Variable(4)          $      25,000                 $1
   ----------------------- ------------------------ --------------------- -------------------- ------------------------
          Class A-R          $             100         Variable(2)          $         100              N/A
   ----------------------- ------------------------ --------------------- -------------------- ------------------------
          Class B-1          $      14,660,000         Variable(5)          $      25,000                 $1
   ----------------------- ------------------------ --------------------- -------------------- ------------------------
          Class B-2          $       8,223,000         Variable(5)          $      25,000                 $1
   ----------------------- ------------------------ --------------------- -------------------- ------------------------
          Class B-3          $       2,861,000         Variable(5)          $      25,000                 $1
   ----------------------- ------------------------ --------------------- -------------------- ------------------------
          Class B-4          $       5,721,000         Variable(5)          $     100,000             $1,000
   ----------------------- ------------------------ --------------------- -------------------- ------------------------
          Class B-5          $       2,503,000         Variable(5)          $     100,000             $1,000
   ----------------------- ------------------------ --------------------- -------------------- ------------------------
          Class B-6          $       1,787,235         Variable(5)          $     100,000             $1,000
   ----------------------- ------------------------ --------------------- -------------------- ------------------------
          Class P-1          $             100            (6)               $         100                N/A
   ----------------------- ------------------------ --------------------- -------------------- ------------------------
          Class P-2          $             100            (7)               $         100                N/A
   ----------------------- ------------------------ --------------------- -------------------- ------------------------
           Class L                         N/A            (8)                         N/A                N/A
   ======================= ======================== ===================== ==================== ========================
</TABLE>

(1) The Pass-Through Rate for the Class A-1 Certificates for the Interest
Accrual Period related to each Distribution Date will equal the lesser of (x)
LIBOR plus the related Pass-Through Margin and (y) the Net Rate Cap; provided
that, so long as the Swap Contract remains in effect, the Net Rate Cap will not
apply to the Pass-Through Rate of the Class A-1 Certificates. Solely for federal
income tax purposes, the Pass-Through Rate for the Class A-1 Certificates will
be calculated without reference to the foregoing proviso and by calculating the
Net Rate Cap without reference to any Swap Termination Payments. The
Pass-Through Rate for this Class of Certificates for the Interest Accrual Period
related to the first Distribution Date is 5.258% per annum.

(2) The Pass-Through Rate for the Class 1-A-2 Certificates for the Interest
Accrual Period related to each Distribution Date will equal the Weighted Average
Adjusted Net Mortgage Rate of the Group 1 Mortgage Loans for that Distribution
Date. The Pass-Through Rate for the Class 1-A-2 Certificates for the Interest
Accrual Period related to the first Distribution Date is 6.2876% per annum.

(3) The Pass-Through Rate for the Class 2-A-2 Certificates for the Interest
Accrual Period related to each Distribution Date will equal the Weighted Average
Adjusted Net Mortgage Rate of the Group 2 Mortgage Loans for that Distribution
Date. The Pass-Through Rate for the Class 2-A-2 Certificates for the Interest
Accrual Period related to the first Distribution Date is 6.4688% per annum.

(4) The Pass-Through Rate for the Class 3-A-2 Certificates for the Interest
Accrual Period related to each Distribution Date will equal the Weighted Average
Adjusted Net Mortgage Rate of the Group 3 Mortgage Loans for that Distribution
Date. The Pass-Through Rate for the Class 3-A-2 Certificates for the Interest
Accrual Period related to the first Distribution Date is 6.3573% per annum.

(5) The Pass-Through Rate for each Class of Subordinated Certificates for each
Interest Accrual Period for any Distribution Date will be a per annum rate equal
to the Subordinate Pass-Through Rate. The

                                       5
<PAGE>

Pass-Through Rate for the Subordinated Certificates for the Interest Accrual
Period related to the first Distribution Date is 6.3446% per annum. For federal
income tax purposes, the Pass-Through Rate for each Class of Subordinated
Certificates will be the Calculation Rate.

(6) The Class P-1 Certificates will not be entitled to any interest, but will be
entitled to 100% of any Hard Prepayment Charges collected on the Mortgage Loans.
The Class P-1 Certificates are issuable as a single certificate.

(7) The Class P-2 Certificates will not be entitled to any interest, but will be
entitled to 100% of any Soft Prepayment Charges paid on the Mortgage Loans. The
Class P-2 Certificates are issuable as a single certificate.

(8) The Class L Certificates will not bear interest but will be entitled to 100%
of any Late Payment Fees collected on the Mortgage Loans. For federal income tax
purposes, the Trustee will treat Late Payment Fees as beneficially owned by the
Holder of the Class L Certificates and shall treat such portion of the Trust
Fund as an interest in a "trust" within the meaning of Treasury regulations
section 301.7701-4(a) (the "Grantor Trust"). The Class L Certificates are
issuable as a single certificate.

         The Master REMIC will issue an uncertificated Class IO Interest that
will be retained by Deutsche Bank Securities Inc. The Class IO Interest will:
(i) be designated a regular interest in the Master REMIC, (ii) have a notional
balance on each Distribution Date equal to the sum of the principal balances of
the Class 2-1-A-1, Class 2-2-A-1 and Class 2-3-A-1 Interests for such
Distribution Date and (iii) have a Pass-Through Rate, for the Interest Accrual
Period for any Distribution Date on which the Swap Contract is not in effect,
equal to the excess, if any, of the Net Rate Cap in respect of the Class A-1
Certificates, excluding for purposes of this calculation any reference to Swap
Termination Payments, over the Pass-Through Rate for the Class A-1 Certificates,
as adjusted for federal income tax purposes in Note (1) to the "Master REMIC"
chart, for such Interest Accrual Period. The foregoing REMIC structure is
intended to cause all of the cash from the Mortgage Loans to flow through to the
Master REMIC as cash flow on a REMIC regular interest, without creating any
shortfall--actual or potential (other than for credit losses) to any REMIC
regular interest.

         For any purpose for which the Pass-Through Rates is calculated, the
interest rate on the Mortgage Loans shall be appropriately adjusted to account
for the difference between the monthly day count convention of the Mortgage
Loans and the monthly day count convention of the regular interests issued by
each of the REMICs. For purposes of calculating the Pass-Through Rates for each
of the interests issued by REMIC 1 and the Master REMIC such rates shall be
adjusted to equal a monthly day count convention based on a 30 day month for
each Due Period and a 360-day year so that the Mortgage Loans and all regular
interests will be using the same monthly day count convention.

Set forth below are designations of Classes of Certificates to the categories
used in this Agreement:

<TABLE>
<CAPTION>
<S>                                                           <C>
Accretion Directed Certificates..........................     None.

Accrual Certificates.....................................     None.

Book-Entry Certificates..................................     All Classes of Certificates other than the Physical Certificates.

Class P Certificates.....................................     Class P-1 and Class P-2 Certificates.

COFI Certificates........................................     None.

                                                                 6
<PAGE>

Components...............................................     For purposes of calculating distributions of principal and/or
                                                              interest, the Component Certificates will be comprised of multiple
                                                              payment components having the designations, Initial Component
                                                              Balances and Pass-Through Rates set forth below:

                                                                                  Initial Component   Pass-Through
                                                              Designation         Balance             Rate
                                                              -----------         -------             ----
                                                              Class A-1-1          $243,988,000            (1)
                                                              Component
                                                              Class A-1-2           $93,404,000            (1)
                                                              Component
                                                              Class A-1-3          $180,700,000            (1)
                                                              Component

                                                              (1) The Pass-Through Rate for this Component for the Interest
                                                              Accrual Period for any Distribution Date will equal the Weighted
                                                              Average Adjusted Net Mortgage Rate of the related Loan Group for
                                                              such Distribution Date.

Component Certificates...................................     Class A-1 Certificates.

Delay Certificates.......................................     All interest-bearing Classes of Certificates other than any
                                                              Non-Delay Certificates.

ERISA-Restricted Certificates,...........................     The Residual Certificates and the Private Certificates; the Retained
                                                              Certificates (other than the Private Certificates) until they have
                                                              been the subject of an ERISA-Qualifying Underwriting; and
                                                              Certificates that cease to have a rating of BBB- (or its
                                                              equivalent), or better, from at least one Rating Agency.

Group 1 Senior Certificates..............................     Class 1-A-2 and Class A-R Certificates and Class A-1-1 Component.

Group 1 Certificates.....................................     Group 1 Senior Certificates and the portion of the Subordinated
                                                              Certificates related to Loan Group 1.

Group 2 Senior Certificates..............................     Class 2-A-2 Certificates and Class A-1-2 Component.

Group 2 Certificates.....................................     Group 2 Senior Certificates and the portion of the Subordinated
                                                              Certificates related to Loan Group 2.

Group 3 Senior Certificates..............................     Class 3-A-2 Certificates and Class A-1-3 Component.

                                                                7
<PAGE>

Group 3 Certificates.....................................     Group 3 Senior Certificates and the portion of the Subordinated
                                                              Certificates related to Loan Group 3.

LIBOR Certificates.......................................     Class A-1 Certificates.

Non-Delay Certificates...................................     LIBOR Certificates.

Notional Amount Certificates.............................     None.

Notional Amount Components...............................     None.

Offered Certificates.....................................     All Classes of Certificates other than the Private Certificates.

Physical Certificates....................................     Class A-R Certificates and the Private Certificates.

Planned Principal Classes................................     None.

Principal Only Certificates..............................     None.

Private Certificates.....................................     Class P-1, Class P-2, Class L, Class B-4, Class B-5 and Class B-6
                                                              Certificates.

Rating Agencies..........................................     Fitch and S&P.

Regular Certificates.....................................     All Classes of Certificates other than the Class A-R Certificates.

Residual Certificate.....................................     Class A-R Certificates.

Retained Certificates....................................     Class 1-A-2, Class 2-A-2, Class 3-A-2, Class B-1, Class B-2, Class
                                                              B-3, Class B-4, Class B-5, Class B-6, Class P-1, Class P-2 and Class
                                                              L Certificates.

Senior Certificates......................................     Class A-1, Class 1-A-2, Class 2-A-2, Class 3-A-2 and Class A-R
                                                              Certificates.

Senior Certificate Group.................................     The Group 1 Senior Certificates, the Group 2 Senior Certificates and
                                                              the Group 3 Senior Certificates, as applicable.

Subordinated Certificates................................     Class B-1, Class B-2, Class B-3, Class B-4, Class B-5 and Class B-6
                                                              Certificates.

Targeted Principal Classes...............................     None.

Targeted Principal Component.............................     None.

                                                                8
</TABLE>

<PAGE>

         With respect to any of the foregoing designations as to which the
corresponding reference is "None," all defined terms and provisions in this
Agreement relating solely to such designations shall be of no force or effect,
and any calculations in this Agreement incorporating references to such
designations shall be interpreted without reference to such designations and
amounts. Defined terms and provisions in this Agreement relating to statistical
rating agencies not designated above as Rating Agencies shall be of no force or
effect.

                                        9
<PAGE>

                                   ARTICLE ONE

                                   DEFINITIONS

         Section 1.01      Definitions.

         Unless the context requires a different meaning, capitalized terms are
used in this Agreement as defined below.

         Accretion Directed Certificates: As specified in the Preliminary
Statement.

         Accretion Direction Rule:  Not applicable.

         Accrual Amount:  Not applicable.

         Accrual Certificates:  As specified in the Preliminary Statement.

         Accrual Termination Date:  Not applicable.

         Additional Designated Information:  As defined in Section 11.02.

         Adjusted Mortgage Rate: As to each Mortgage Loan and at any time, the
per annum rate equal to the Mortgage Rate less the Servicing Fee Rate.

         Adjusted Net Mortgage Rate: As to each Mortgage Loan and any
Distribution Date, the per annum rate equal to the Mortgage Rate of that
Mortgage Loan (as of the Due Date in the month preceding the month in which such
Distribution Date occurs) less the Expense Fee Rate for that Mortgage Loan.

         Adjustment Date: A date specified in each Mortgage Note as a date on
which the Mortgage Rate on the related Mortgage Loan is subject to adjustment.

         Advance: As to a Loan Group, the payment required to be made by the
Servicer with respect to any Distribution Date pursuant to Section 4.01, the
amount of any such payment being equal to the aggregate of payments of principal
and interest (net of the Servicing Fee) on the Mortgage Loans in such Loan Group
that were due during the related Due Period and not received as of the close of
business on the related Determination Date, together with an amount equivalent
to interest on each REO Property, net of any net income from such REO Property,
less the aggregate amount of any such delinquent payments that the Servicer has
determined would constitute a Nonrecoverable Advance if advanced.

         Advance Notice: As defined in Section 4.01(b).

         Advance Deficiency: As defined in Section 4.01(b).

         Affiliate: With respect to any Person, any other Person controlling,
controlled or under common control with such Person. For purposes of this
definition, "control" means the power to direct the management and policies of a
Person, directly or indirectly, whether through ownership of voting securities,
by contract, or otherwise and "controlling" and "controlled" shall have meanings
correlative to the foregoing. Affiliates also include any entities consolidated
with the requirements of generally accepted accounting principles.

         Aggregate Subordinated Percentage: With respect to any Distribution
Date, the fraction, expressed as a percentage, the numerator of which is equal
to the aggregate Class Certificate Balance of

                                       10
<PAGE>

the Subordinated Certificates immediately prior to such Distribution Date and
the denominator of which is the aggregate Stated Principal Balance of all the
Mortgage Loans as of the Due Date in the month preceding the month of such
Distribution Date (after giving effect to Principal Prepayments received in the
Prepayment Period related to that prior Due Date).

         Agreement: This Pooling and Servicing Agreement and all amendments and
supplements.

         Allocable Share: As to any Distribution Date and Class of Certificates,
the ratio that the amount calculated with respect to such Distribution Date (A)
with respect to the Senior Certificates of the related Senior Certificate Group,
pursuant to clause (i) of the definition of Class Optimal Interest Distribution
Amount (without giving effect to any reduction of such amount pursuant to
Section 4.02 (d)) and (B) with respect to the Subordinated Certificates,
pursuant to the definition of Assumed Interest Amount or after the second Senior
Termination Date pursuant to clause (i) of the definition of Class Optimal
Interest Distribution Amount (without giving effect to any reduction of such
amount pursuant to Section 4.02(d)) bears to the amount calculated with respect
to such Distribution Date for each Class of Certificates pursuant to clause (i)
o`f the definition of Class Optimal Interest Distribution Amount (without giving
effect to any reduction of such amount pursuant to Section 4.02(d)) or the
definition of Assumed Interest Amount for such Loan Group and Class, as
applicable.

         Amount Held for Future Distribution: As to any Distribution Date and
the Mortgage Loans in a Loan Group, the aggregate amount held in the Certificate
Account at the close of business on the related Determination Date on account of
(i) Principal Prepayments received after the last day of the related Prepayment
Period and Liquidation Proceeds and Subsequent Recoveries relating to the
Mortgage Loans in such Loan Group received in the month of such Distribution
Date and (ii) all Scheduled Payments relating to the Mortgage Loans in that Loan
Group due after the related Due Date.

         Applicable Credit Support Percentage:  As defined in Section 4.02(e).

         Appraised Value: With respect to any Mortgage Loan, the Appraised Value
of the related Mortgaged Property shall be: (i) with respect to a Mortgage Loan
other than a Refinance Loan, the lesser of (a) the value of the Mortgaged
Property based upon the appraisal made at the time of the origination of such
Mortgage Loan and (b) the sales price of the Mortgaged Property at the time of
the origination of such Mortgage Loan; (ii) with respect to a Refinance Loan,
the value of the Mortgaged Property based upon the appraisal made at the time of
the origination of such Refinance Loan.

         Assumed Balance: With respect to any Distribution Date and Loan Group,
the product of the Subordinated Percentage for that Distribution Date and the
aggregate Stated Principal Balance of each Mortgage Loan in that Loan Group as
of the Due Date occurring in the month prior to the month of that Distribution
Date (after giving effect to Principal Prepayments received in the Prepayment
Period related to such prior Due Date).

         Assumed Interest Amount: With respect to any Distribution Date, any
Class of Subordinated Certificates and any Loan Group, one month's interest
accrued during the related Interest Accrual Period at the Pass-Through Rate for
such Class of Subordinated Certificates on the related Assumed Balance
immediately prior to that Distribution Date.

         Available Funds: As to any Distribution Date and the Mortgage Loans in
a Loan Group, the sum of (a) the aggregate amount held in the Certificate
Account at the close of business on the related Determination Date, including
any Subsequent Recoveries with respect to the Mortgage Loans in that Loan Group,
net of the Amount Held for Future Distribution, net of Prepayment Charges, the
$200 held in trust for the Class P Certificates and Late Payment Fees and net of
amounts permitted to be withdrawn

                                       11
<PAGE>

from the Certificate Account pursuant to clauses (i) - (viii), inclusive, of
Section 3.09(a) and amounts permitted to be withdrawn from the Distribution
Account pursuant to clauses (i) - (iii), inclusive, of Section 3.09(b), (b) the
amount of the related Advance, (c) in connection with Defective Mortgage Loans
in such Loan Group, as applicable, the aggregate of the Purchase Prices and
Substitution Adjustment Amounts deposited on the related Distribution Account
Deposit Date, and (d) any amount deposited on the related Distribution Account
Deposit Date pursuant to Section 3.10. The Holders of the Class P Certificates
will be entitled to all Prepayment Charges received on the Mortgage Loans and
such amounts will not be available for distribution to the Holders of any other
Class of Certificates. The Holders of the Class L Certificates will be entitled
to all Late Payment Fees received on the Mortgage Loans, and such amounts will
not be available for distribution to the Holders of any other Class of
Certificates.

         Bankruptcy Code: The United States Bankruptcy Reform Act of 1978, as
amended.

         Bankruptcy Coverage Termination Date: Not applicable.

         Bankruptcy Loss: With respect to any Mortgage Loan, a Deficient
Valuation or Debt Service Reduction; provided, however, that a Bankruptcy Loss
shall not be deemed a Bankruptcy Loss under this Agreement so long as the
Servicer has notified the Trustee in writing that the Servicer is diligently
pursuing any remedies that may exist in connection with the related Mortgage
Loan and either (A) the related Mortgage Loan is not in default with regard to
payments due under the Mortgage Loan or (B) delinquent payments of principal and
interest under the related Mortgage Loan and any related escrow payments in
respect of such Mortgage Loan are being advanced on a current basis by the
Servicer, in either case without giving effect to any Debt Service Reduction or
Deficient Valuation..

         Bankruptcy Loss Coverage Amount: Not applicable.

         Blanket Mortgage: The mortgage or mortgages encumbering a Cooperative
Property.

         Book-Entry Certificates: As specified in the Preliminary Statement.

         Business Day: Any day other than (i) a Saturday or a Sunday, or (ii) a
day on which banking institutions in the City of New York, New York, the State
of California or the city in which the Corporate Trust Office of the Trustee is
located (excluding the city where the Certificate Registrar is located) are
authorized or obligated by law or executive order to be closed.

         Calculation Rate: For each Distribution Date, the product of (i) 10 and
(ii) the weighted average pass-through rate of the outstanding Class A and Class
B Interests, treating each of the Class A Interests as having an Interest Rate
of 0.00%.

         Cap Counterparty: Not applicable.

         Certificate: Any one of the certificates issued by the Trust Fund and
executed by the Trustee in substantially the forms attached as exhibits.

         Certificate Account: The separate Eligible Account or Accounts created
and maintained by the Servicer pursuant to Section 3.06(d) with a depository
institution in the name of the Servicer for the benefit of the Trustee on behalf
of Certificateholders and designated "IndyMac Bank, F.S.B., in trust for the
registered holders of IndyMac INDA Mortgage Loan Trust 2007-AR8, Mortgage
Pass-Through Certificates, Series 2007-AR8."

                                       12
<PAGE>

         Certificate Balance: With respect to any Certificate (other than the
Class L Certificates) at any date of determination, the maximum dollar amount of
principal to which the Holder thereof is then entitled under this Agreement,
such amount being equal to the Denomination thereof (A) plus any increase in the
Certificate Balance of such Certificate pursuant to Section 4.02 due to the
receipt of Subsequent Recoveries on the Mortgage Loans in a Loan Group, (B)
minus the sum of (i) all distributions of principal previously made with respect
thereto and (ii) all Realized Losses allocated to that Certificate and, in the
case of any Subordinated Certificates, all other reductions in Certificate
Balance previously allocated to that Certificate pursuant to Section 4.05 and
(C) in the case of any Class of Accrual Certificates, plus the Accrual Amount
added to the Class Certificate Balance of such Class prior to such date. The
Class L Certificates have no Certificate Balance.

         Certificate Group: Any of the Group 1, Group 2 or Group 3 Certificates,
as the context requires.

         Certificate Owner: With respect to a Book-Entry Certificate, the Person
who is the beneficial owner of the Book-Entry Certificate. For the purposes of
this Agreement, in order for a Certificate Owner to enforce any of its rights
under this Agreement, it shall first have to provide evidence of its beneficial
ownership interest in a Certificate that is reasonably satisfactory to the
Trustee, the Depositor and/or the Servicer, as applicable.

         Certificate Register: The register maintained pursuant to Section 5.02.

         Certificate Registrar: Deutsche Bank National Trust Company and its
successors and, if a successor certificate registrar is appointed under this
Agreement, the successor.

         Certificateholder or Holder: The person in whose name a Certificate is
registered in the Certificate Register, except that, solely for the purpose of
giving any consent pursuant to this Agreement, any Certificate registered in the
name of the Depositor or any affiliate of the Depositor is not Outstanding and
the Percentage Interest evidenced thereby shall not be taken into account in
determining whether the requisite amount of Percentage Interests necessary to
effect a consent has been obtained, except that if the Depositor or its
affiliates own 100% of the Percentage Interests evidenced by a Class of
Certificates, the Certificates shall be Outstanding for purposes of any
provision of this Agreement requiring the consent of the Holders of Certificates
of a particular Class as a condition to the taking of any action. The Trustee is
entitled to rely conclusively on a certification of the Depositor or any
affiliate of the Depositor in determining which Certificates are registered in
the name of an affiliate of the Depositor.

         Certification Party: As defined in Section 11.05.

         Certifying Person: As defined in Section 11.05.

         Class: All Certificates bearing the same class designation as set forth
in the Preliminary Statement.

         Class A-1 Component Interest Distribution Amount: For any Distribution
Date, (1) the sum of (A) the product of (x) the Component Balance of the Class
A-1-1 Component (immediately prior to that Distribution Date) and (y) the
Weighted Average Adjusted Net Mortgage Rate of the Group 1 Mortgage Loans, (B)
the product of (x) the Component Balance of the Class A-1-2 Component
(immediately prior to that Distribution Date) and (y) the Weighted Average
Adjusted Net Mortgage Rate of the Group 2 Mortgage Loans and (C) the product of
(x) the Component Balance of the Class A-1-3 Component (immediately prior to
that Distribution Date) and (y) the Weighted Average Adjusted Net Mortgage Rate
of the Group 3 Mortgage Loans, minus (2) the aggregate Class Interest Shortfall
allocated to such Components for such Distribution Date.

                                       13
<PAGE>

         Class A Interest: Each of the Class A-1, Class A-2 and Class A-3
Interests.

         Class B Interest: Each of the Class B-1, Class B-2 and Class B-3
Interests.

         Class C Interest: Each of the Class C-1, Class C-2 and Class C-3
Interests.

         Class Certificate Balance: For any Class as of any date of
determination, the aggregate of the Certificate Balances of all Certificates of
the Class as of that date.

         Class Interest Shortfall: As to any Distribution Date and Class, the
amount by which the amount described in clause (i) of the definition of Class
Optimal Interest Distribution Amount for such Class exceeds the amount of
interest actually distributed on such Class on such Distribution Date pursuant
to such clause (i).

         Class IO Interest: The uncertificated interest relating to Excess
Interest created pursuant to Section 4.02.

         Class Optimal Interest Distribution Amount: With respect to any
Distribution Date and interest-bearing Class or Component, the sum of (i) one
month's interest accrued during the related Interest Accrual Period at the
Pass-Through Rate for such Class on the related Class Certificate Balance or
Component Balance immediately prior to such Distribution Date, subject to
reduction pursuant to Section 4.02(d), and (ii) any Class Unpaid Interest
Amounts for such Class. All Classes of Delay Certificates will accrue interest
on the basis of a 360-day year consisting of twelve 30-day months. The Non-Delay
Certificates will accrue interest on the basis of a 360-day year and the actual
number of days in the applicable Interest Accrual Period.

         Class Subordination Percentage: With respect to any Distribution Date
and each Class of Subordinated Certificates, the fraction (expressed as a
percentage) the numerator of which is the Class Certificate Balance of such
Class of Subordinated Certificates immediately prior to such Distribution Date
and the denominator of which is the aggregate Class Certificate Balance of all
Classes of Certificates immediately prior to such Distribution Date.

         Class Unpaid Interest Amounts: As to any Distribution Date and Class of
interest-bearing Certificates, the amount by which the aggregate Class Interest
Shortfalls for such Class on prior Distribution Dates exceeds the amount
distributed on such Class on prior Distribution Dates pursuant to clause (ii) of
the definition of Class Optimal Interest Distribution Amount.

         Closing Date: November 29, 2007.

         Code: The Internal Revenue Code of 1986, including any successor or
amendatory provisions.

         COFI: Not applicable.

         COFI Certificates: Not applicable.

         Collateral Account: The separate Eligible Account or Accounts created
and maintained by the Supplemental Interest Trustee pursuant to Section 3.06(h)
with a depository institution in the name of the Supplemental Interest Trustee
for the benefit of the Supplemental Interest Trust on behalf of the Holders of
the LIBOR Certificates and designated "IndyMac Bank, F.S.B., in trust for the
registered Holders of LIBOR Certificates of IndyMac INDA Mortgage Loan Trust
2007-AR8, Mortgage Pass-Through Certificates, Series 2007-AR8."

                                       14
<PAGE>

         Commission: The United States Securities and Exchange Commission.

         Compensating Interest: For any Distribution Date, 0.125% multiplied by
one-twelfth multiplied by the aggregate Stated Principal Balance of the Mortgage
Loans as of the first day of the prior month.

         Component: As specified in the Preliminary Statement.

         Component Balance: With respect to each Component and any Distribution
Date, its initial Component Balance (A) plus any increase in that Component
Balance due to the receipt of Subsequent Recoveries, (B) minus the sum of all
amounts applied in reduction of the Component Balance of that Component and
Realized Losses allocated thereto.

         Component Notional Amount: Not applicable.

         Component Certificates: As specified in the Preliminary Statement.

         Co-op Shares: Shares issued by a Cooperative Corporation.

         Cooperative Corporation: The entity that holds title (fee or an
acceptable leasehold estate) to the real property and improvements constituting
the Cooperative Property and that governs the Cooperative Property, which
Cooperative Corporation must qualify as a Cooperative Housing Corporation under
section 216 of the Code.

         Cooperative Loan: Any Mortgage Loan secured by Co-op Shares and a
Proprietary Lease.

         Cooperative Property: The real property and improvements owned by the
Cooperative Corporation, including the allocation of individual dwelling units
to the holders of the Co-op Shares of the Cooperative Corporation.

         Cooperative Unit: A single family dwelling located in a Cooperative
Property.

         Corporate Trust Office: The designated office of the Trustee in the
State of California at which at any particular time its corporate trust business
with respect to this Agreement is administered, which office at the date of the
execution of this Agreement is located at 1761 East St. Andrew Place, Santa Ana,
California 92705, Attn: Trust Administration- IN07D8 (IndyMac MBS, Inc., IndyMac
INDA Mortgage Loan Trust 2007-AR8, Mortgage Pass-Through Certificates, Series
2007-AR8), and which is the address to which notices to and correspondence with
the Trustee should be directed. The office of the Certificate Registrar for
purposes of presentment of certificates for registration of transfer, exchange
or final payment is located at Deutsche Bank National Trust Company, c/o DB
Services Tennessee, 648 Grassmere Park Road, Nashville, Tennessee 37211-3658,
Attention: Transfer Unit.

         Cross-over Situation: For any Distribution Date and for any Loan Group
(after taking into account principal distributions on such Distribution Date) a
Cross-Over Situation exists with respect to the Class A and Class B Interests of
the Loan Group if such Interests in the aggregate are less than 1% of the
Assumed Balance of the related Loan Group.

         Cut-off Date: November 1, 2007.

         Cut-off Date Pool Principal Balance: $715,103,334.84.

                                       15
<PAGE>

         Cut-off Date Principal Balance: As to any Mortgage Loan, its Stated
Principal Balance as of the close of business on the Cut-off Date.

         Debt Service Reduction: For any Mortgage Loan, a reduction by a court
of competent jurisdiction in a proceeding under the Bankruptcy Code in the
Scheduled Payment for the Mortgage Loan that became final and non-appealable,
except a reduction resulting from a Deficient Valuation or a reduction that
results in a permanent forgiveness of principal.

         Defective Mortgage Loan: Any Mortgage Loan that is required to be
repurchased pursuant to Section 2.02 or 2.03.

         Deficient Valuation: For any Mortgage Loan, a valuation by a court of
competent jurisdiction of the Mortgaged Property in an amount less than the then
outstanding indebtedness under the Mortgage Loan, or any reduction in the amount
of principal to be paid in connection with any Scheduled Payment that results in
a permanent forgiveness of principal, which valuation or reduction results from
an order of the court that is final and non-appealable in a proceeding under the
Bankruptcy Code.

         Definitive Certificates: Any Certificate evidenced by a Physical
Certificate and any Certificate issued in lieu of a Book-Entry Certificate
pursuant to Section 5.02(e).

         Delay Certificates: As specified in the Preliminary Statement.

         Delay Delivery Certification: A certification substantially in the form
of Exhibit G-2.

         Delay Delivery Mortgage Loans: The Mortgage Loans identified on the
Mortgage Loan Schedule for which none of a related Mortgage File, or neither the
Mortgage Note, nor a lost note affidavit for a lost Mortgage Note, has been
delivered to the Trustee by the Closing Date. The Depositor shall deliver the
Mortgage Files to the Trustee:

         (A) for at least 70% of the Mortgage Loans in each Loan Group, not
later than the Closing Date, and

         (B) for the remaining 30% of the Mortgage Loans in each Loan Group, not
later than five Business Days following the Closing Date.

         To the extent that the Seller is in possession of any Mortgage File for
any Delay Delivery Mortgage Loan, until delivery of the Mortgage File to the
Trustee as provided in Section 2.01, the Seller shall hold the files as
Servicer, as agent and in trust for the Trustee.

         Deleted Mortgage Loan: As defined in Section 2.03(c).

         Delinquent: A Mortgage Loan is "Delinquent" if any monthly payment due
on a Due Date is not made by the close of business on the day immediately
preceding the next scheduled Due Date for such Mortgage Loan. A Mortgage Loan is
"30 days Delinquent" if such monthly payment has not been received by the close
of business on the last day of the month in which such monthly payment was due.
The determination of whether a Mortgage Loan is "60 days Delinquent", "90 days
Delinquent", etc. shall be made in a like manner.

         Denomination: For each Certificate, the amount on the face of the
Certificate as the "Initial Certificate Balance of this Certificate" or the
"Initial Notional Amount of this Certificate" or, if neither of the foregoing,
the Percentage Interest appearing on the face of the Certificate.

                                       16
<PAGE>

         Depositor: IndyMac MBS, Inc., a Delaware corporation, or its successor
in interest.

         Depository: The initial Depository shall be The Depository Trust
Company, the nominee of which is CEDE & Co., as the registered Holder of the
Book-Entry Certificates. The Depository shall at all times be a "clearing
corporation" as defined in Section 8-102(a)(5) of the UCC.

         Depository Participant: A broker, dealer, bank, or other financial
institution or other Person for whom from time to time a Depository effects
book-entry transfers and pledges of securities deposited with the Depository.

         Determination Date: As to any Distribution Date, the 15th day of each
month or if that day is not a Business Day the next Business Day.

         Distribution Account: The separate Eligible Account created and
maintained by the Trustee pursuant to Section 3.06(e) in the name of the Trustee
for the benefit of the Certificateholders and designated "Deutsche Bank National
Trust Company in trust for registered holders of IndyMac INDA Mortgage Loan
Trust 2007-AR8, Mortgage Pass-Through Certificates, Series 2007-AR8." Funds in
the Distribution Account shall be held in trust for the Certificateholders for
the uses and purposes set forth in this Agreement.

         Distribution Account Deposit Date: As to any Distribution Date, 12:30
P.M. Pacific time on the Business Day preceding the Distribution Date.

         Distribution Date: The 25th day of each calendar month after the
initial issuance of the Certificates, or if that day is not a Business Day, the
next Business Day, commencing in December 2007.

         Due Date: For any Mortgage Loan and Distribution Date, the first day of
the month in which such Distribution Date occurs.

         Due Period: For any Distribution Date, the period commencing on the
second day of the month preceding the month in which the Distribution Date
occurs and ending on the first day of the month in which the Distribution Date
occurs.

         EDGAR: The Commission's Electronic Data Gathering, Analysis and
Retrieval system.

         Eligible Account: Any of

         (i) an account or accounts maintained with a federal or state chartered
depository institution or trust company the short-term unsecured debt
obligations of which (or, in the case of a depository institution or trust
company that is the principal subsidiary of a holding company, the debt
obligations of either such holding company or the depository institution or
trust company, whichever are rated higher) have (x) if Moody's is a Rating
Agency at the time amounts are held on deposit therein, the highest short-term
ratings of Moody's (which shall be Prime-1), (y) if Fitch is a Rating Agency at
the time any amounts are held on deposit therein, the highest short-term rating
of Fitch (which shall be F1 for funds held for less than 30 days, and F1+ for
funds held for longer than 30 days and less than 365 days) and (z) if S&P is a
Rating Agency at the time any amounts are held on deposit therein, a short-term
rating of at least A-2, for funds held no longer than 30 days, and, if funds
will be held longer than 30 days and less than 365 days, a short-term rating of
at least A-1+, or

         (ii) if either of Moody's or Fitch is a Rating Agency, an account or
accounts in a depository institution or trust company in which such accounts are
insured by the FDIC (to the limits established by

                                       17

<PAGE>

the FDIC) and the uninsured deposits in which accounts are otherwise secured
such that, as evidenced by an Opinion of Counsel delivered to the Trustee and to
each Rating Agency, the Certificateholders have a claim with respect to the
funds in such account or a perfected first priority security interest against
any collateral (which shall be limited to Permitted Investments) securing such
funds that is superior to claims of any other depositors or creditors of the
depository institution or trust company in which such account is maintained (it
being understood that any account permitted by this clause (ii) shall not be an
Eligible Account in connection with a rating provided by S&P of any Class of
Certificates), or

         (iii) a trust account or accounts maintained with (a) the trust
department of a federal or state chartered depository institution or (b) a trust
company, acting in its fiduciary capacity, or

         (iv) any other account acceptable to each Rating Agency.

         Eligible Accounts may bear interest, and may include, if otherwise
qualified under this definition, accounts maintained with the Trustee.

         ERISA: The Employee Retirement Income Security Act of 1974, as amended.

         ERISA-Qualifying Underwriting: A best efforts or firm commitment
underwriting or private placement that meets the requirements of the
Underwriter's Exemption.

         ERISA-Restricted Certificate: As specified in the Preliminary
Statement.

         Escrow Account: The Eligible Account or Accounts established and
maintained pursuant to Section 3.07(a).

         Event of Default: As defined in Section 7.01.

         Excess Interest: For any Distribution Date after the Swap Termination
Date, the excess, if any, of (i) the aggregate Class Optimal Interest
Distribution Amount for the Components for such Distribution Date over (ii) the
Class Optimal Interest Distribution Amount for the Class A-1 Certificates for
such Distribution Date.

         Excess Loss: Not applicable.

         Excess Proceeds: For any Liquidated Mortgage Loan, the excess of

         (a) all Liquidation Proceeds from the Mortgage Loan received in the
calendar month in which the Mortgage Loan became a Liquidated Mortgage Loan, net
of any amounts previously reimbursed to the Servicer as Nonrecoverable Advances
with respect to the Mortgage Loan pursuant to Section 3.09(a)(iii), over

         (b) the sum of (i) the unpaid principal balance of the Liquidated
Mortgage Loan as of the Due Date in the month in which the Mortgage Loan became
a Liquidated Mortgage Loan plus (ii) accrued interest at the Mortgage Rate from
the Due Date for which interest was last paid or advanced (and not reimbursed)
to Certificateholders up to the Due Date applicable to the Distribution Date
following the calendar month during which the liquidation occurred.

         Exchange Act: The Securities Exchange Act of 1934, as amended, and the
rules and regulations promulgated thereunder.

                                       18
<PAGE>

         Exchange Act Reports: Any reports on Form 10-D, Form 8-K and Form 10-K
required to be filed by the Depositor with respect to the Trust Fund under the
Exchange Act.

         Expense Fee Rate: As to each Mortgage Loan, the sum of (a) the
Servicing Fee Rate and (b) the Trustee Fee Rate.

         FDIC: The Federal Deposit Insurance Corporation, or any successor
thereto.

         FHLMC: The Federal Home Loan Mortgage Corporation, a corporate
instrumentality of the United States created and existing under Title III of the
Emergency Home Finance Act of 1970, as amended, or any successor thereto.

         Fitch: Fitch, Inc., or any successor thereto. If Fitch is designated as
a Rating Agency in the Preliminary Statement, for purposes of Section 10.05(b)
the address for notices to Fitch shall be Fitch, Inc., One State Street Plaza,
New York, NY 10004, Attention: MBS Monitoring - IndyMac INDA 2007-AR8, or any
other address Fitch furnishes to the Depositor and the Servicer.

         FNMA: The Federal National Mortgage Association, a federally chartered
and privately owned corporation organized and existing under the Federal
National Mortgage Association Charter Act, or any successor thereto.

         Form 10-D Disclosure Item: With respect to any Person, any material
litigation or governmental proceedings pending against such Person, or against
any of the Trust Fund, the Depositor, the Trustee or the Servicer, if such
Person has actual knowledge thereof.

         Form 10-K Disclosure Item: With respect to any Person, (a) Form 10-D
Disclosure Item, and (b) any affiliations or relationships between such Person
and any Item 1119 Party.

         Fraud Loan: Not applicable.

         Fraud Loss Coverage Amount: Not applicable.

         Fraud Loss Coverage Termination Date: Not applicable.

         Fraud Losses: Realized Losses on Mortgage Loans as to which a loss is
sustained by reason of a default arising from fraud, dishonesty or
misrepresentation in connection with the related Mortgage Loan, including a loss
by reason of the denial of coverage under any related Primary Insurance Policy
because of such fraud, dishonesty or misrepresentation.

         Grantor Trust: As specified in the Preliminary Statement.

         Gross Margin: With respect to each Mortgage Loan, the fixed percentage
set forth in the related Mortgage Note that is added to the Mortgage Index on
each Adjustment Date in accordance with the terms of the related Mortgage Note
used to determine the Mortgage Rate for such Mortgage Loan.

         Group 1 Certificates: As specified in the Preliminary Statement.

         Group 1 Mortgage Loan: Any Mortgage Loan in Loan Group 1.

         Group 1 Senior Certificates: As specified in the Preliminary Statement.

         Group 2 Certificates: As specified in the Preliminary Statement.

                                       19
<PAGE>

         Group 2 Mortgage Loan: Any Mortgage Loan in Loan Group 2.

         Group 2 Senior Certificates: As specified in the Preliminary Statement.

         Group 3 Certificates: As specified in the Preliminary Statement.

         Group 3 Mortgage Loan: Any Mortgage Loan in Loan Group 3.

         Group 3 Senior Certificates: As specified in the Preliminary Statement.

         Hard Prepayment Charges: As to a Mortgage Loan, any charge payable by a
Mortgagor in connection with certain partial Principal Prepayments and all
Principal Prepayments in Full made within the related Prepayment Charge Period,
the Hard Prepayment Charges with respect to each applicable Mortgage Loan so
held by the Trust Fund being identified in the Mortgage Loan Schedule.

         Hedged Certificates: Not applicable.

         Index: Not applicable.

         Indirect Participant: A broker, dealer, bank, or other financial
institution or other Person that clears through or maintains a custodial
relationship with a Depository Participant.

         Initial Bankruptcy Loss Coverage Amount: Not applicable.

         Initial LIBOR Rate: 4.80875% per annum.

         Insurance Policy: For any Mortgage Loan included in the Trust Fund, any
insurance policy, including all riders and endorsements thereto in effect,
including any replacement policy or policies for any Insurance Policies.

         Insurance Proceeds: Proceeds paid by an insurer pursuant to any
Insurance Policy, in each case other than any amount included in such Insurance
Proceeds in respect of Insured Expenses.

         Insured Expenses: Expenses covered by an Insurance Policy or any other
insurance policy with respect to the Mortgage Loans.

         Interest Accrual Period: With respect to each Class of Delay
Certificates and any Distribution Date, the calendar month prior to the month of
such Distribution Date. With respect to each Class of Non-Delay Certificates and
any Distribution Date, the period commencing on the 25th day of the month
preceding the month in which such Distribution Date occurs (or, in the case of
the first Distribution Date, the Closing Date) and ending on the 24th day of the
month in which such Distribution Date occurs.

         Interest Determination Date: With respect to (a) any Interest Accrual
Period for any LIBOR Certificates and (b) any Interest Accrual Period for the
COFI Certificates for which the applicable Index is LIBOR, the second Business
Day prior to the first day of such Interest Accrual Period.

         Interest Rate: With respect to each REMIC 1 Interest, the applicable
rate set forth or calculated in the manner described in the Preliminary
Statement.

         Interest Settlement Rate: As defined in Section 4.07.

                                       20
<PAGE>

         Item 1119 Party: The Depositor, the Seller, the Servicer, the Trustee,
the Swap Counterparty, the Supplemental Interest Trustee and any other material
transaction party, as identified in Exhibit T hereto, as updated pursuant to
Section 11.04.

         Late Payment Fee: As to a Mortgage Loan, any fees assessable by the
related mortgagee in connection with the late payment of a Scheduled Payment due
after the Cut-off Date.

         Latest Possible Maturity Date: The Distribution Date, determined as of
the Closing Date, following the third anniversary of the later of: (i) the
scheduled maturity date of the Mortgage Loan having the latest scheduled
maturity date as of the Cut-off Date, and (ii) the latest possible maturity of
any Substitute Mortgage Loan that may be substituted for any Mortgage Loan
pursuant to this Agreement.

         Lender PMI Loans: Mortgage Loans with respect to which the lender
rather than the borrower acquired the primary mortgage guaranty insurance and
charged the related borrower an interest premium.

         LIBOR: The London interbank offered rate for one month United States
dollar deposits calculated in the manner described in Section 4.07.

         LIBOR Certificates: As specified in the Preliminary Statement.

         LIBOR Determination Date: For any Interest Accrual Period, the second
London Business Day prior to the commencement of such Interest Accrual Period.

         Limited Exchange Act Reporting Obligations: The obligations of the
Servicer under Section 3.17(b), Section 6.02 and Section 6.04 with respect to
notice and information to be provided to the Depositor and Article 11 (except
Section 11.07(a)(i) and (ii)).

         Liquidated Mortgage Loan: For any Distribution Date, a defaulted
Mortgage Loan (including any REO Property) that was liquidated in the calendar
month preceding the month of the Distribution Date and as to which the Servicer
has certified (in accordance with this Agreement) that it has received all
amounts it expects to receive in connection with the liquidation of the Mortgage
Loan, including the final disposition of an REO Property.

         Liquidation Proceeds: Amounts, including Insurance Proceeds regardless
of when received, received in connection with the partial or complete
liquidation of defaulted Mortgage Loans, whether through trustee's sale,
foreclosure sale, or otherwise or amounts received in connection with any
condemnation or partial release of a Mortgaged Property, and any other proceeds
received in connection with an REO Property, less the sum of related
unreimbursed Servicing Fees, Servicing Advances, and Advances.

         Loan Group: Any of Loan Group 1, Loan Group 2 or Loan Group 3, as
applicable.

         Loan Group 1: All Mortgage Loans identified as Group 1 Mortgage Loans
on the Mortgage Loan Schedule.

         Loan Group 2: All Mortgage Loans identified as Group 2 Mortgage Loans
on the Mortgage Loan Schedule.

         Loan Group 3: All Mortgage Loans identified as Group 3 Mortgage Loans
on the Mortgage Loan Schedule.

                                       21
<PAGE>

         Loan-to-Value Ratio: For any Mortgage Loan and as of any date of
determination, is the fraction whose numerator is the original principal balance
of the related Mortgage Loan at that date of determination and whose denominator
is the Appraised Value of the related Mortgaged Property.

         London Business Day: Any day on which dealings in deposits of United
States dollars are transacted in the London interbank market.

         Lost Mortgage Note: Any Mortgage Note the original of which was
permanently lost or destroyed and has not been replaced.

         Maintenance: For any Cooperative Unit, the rent paid by the Mortgagor
to the Cooperative Corporation pursuant to the Proprietary Lease.

         Maximum Mortgage Rate: For each Mortgage Loan, the percentage set forth
in the related Mortgage Note as the lifetime maximum Mortgage Rate to which such
Mortgage Rate may be adjusted.

         MERS: Mortgage Electronic Registration Systems, Inc., a corporation
organized and existing under the laws of the State of Delaware, or any successor
thereto.

         MERS Mortgage Loan: Any Mortgage Loan registered with MERS on the
MERS(R) System.

         MERS(R) System: The system of recording transfers of mortgages
electronically maintained by MERS.

         MIN: The mortgage identification number for any MERS Mortgage Loan.

         Minimum Mortgage Rate: For each Mortgage Loan, the percentage set forth
in the related Mortgage Note as the lifetime minimum Mortgage Rate to which such
Mortgage Rate may be adjusted.

         MOM Loan: Any Mortgage Loan as to which MERS is acting as mortgagee,
solely as nominee for the originator of such Mortgage Loan and its successors
and assigns.

         Monthly Statement: The statement delivered to the Certificateholders
pursuant to Section 4.06.

         Moody's: Moody's Investors Service, Inc., or any successor thereto. If
Moody's is designated as a Rating Agency in the Preliminary Statement, for
purposes of Section 10.05(b) the address for notices to Moody's shall be Moody's
Investors Service, Inc., 99 Church Street, New York, New York 10007, Attention:
Residential Loan Monitoring Group, or any other address that Moody's furnishes
to the Depositor and the Servicer.

         Mortgage: The mortgage, deed of trust, or other instrument creating a
first lien on an estate in fee simple or leasehold interest in real property
securing a Mortgage Note.

         Mortgage File: The mortgage documents listed in Section 2.01 pertaining
to a particular Mortgage Loan and any additional documents delivered to the
Trustee to be added to the Mortgage File pursuant to this Agreement.

         Mortgage Index: One-Year CMT Index, Six-Month LIBOR Index or One-Year
LIBOR Index.

         Mortgage Loans: Such of the mortgage loans transferred and assigned to
the Trustee pursuant to this Agreement, as from time to time are held as a part
of the Trust Fund (including any REO Property),

                                       22
<PAGE>

the Mortgage Loans so held being identified on the Mortgage Loan Schedule,
notwithstanding foreclosure or other acquisition of title of the related
Mortgaged Property.

         Mortgage Loan Schedule: As of any date, the list set forth in Schedule
I of Mortgage Loans included in the Trust Fund on that date. The Mortgage Loan
Schedule shall be prepared by the Seller and shall set forth the following
information with respect to each Mortgage Loan by Loan Group:

                  (i)      the loan number;

                  (ii)     the street address of the Mortgaged Property,
                           including the zip code;

                  (iii)    the maturity date;

                  (iv)     the original principal balance;

                  (v)      the Cut-off Date Principal Balance;

                  (vi)     the first payment date of the Mortgage Loan;

                  (vii)    the Scheduled Payment in effect as of the Cut-off
                           Date;

                  (viii)   the Gross Margin in effect as of the Cut-off Date;

                  (ix)     the Maximum Mortgage Rate in effect as of the Cut-off
                           Date;

                  (x)      the Adjustment Date in effect as of the Cut-off Date;

                  (xi)     a code indicating the Mortgage Index and when it is
                           determined;

                  (xii)    the Loan-to-Value Ratio at origination;

                  (xiii)   a code indicating whether the residential dwelling at
                           the time of origination was represented to be
                           owner-occupied;

                  (xiv)    a code indicating whether the residential dwelling is
                           either (a) a detached single family dwelling, (b) a
                           dwelling in a PUD, (c) a condominium unit, (d) a two-
                           to four-unit residential property, or (e) a
                           Cooperative Unit;

                  (xv)     the Mortgage Rate in effect as of the Cut-off Date;

                  (xvi)    the purpose for the Mortgage Loan;

                  (xvii)   the type of documentation program pursuant to which
                           the Mortgage Loan was originated;

                  (xviii)  a code indicating whether the Mortgage Loan is a
                           borrower-paid mortgage insurance loan;

                  (xix)    the Servicing Fee Rate;

                  (xx)     a code indicating whether the Mortgage Loan is a
                           Lender PMI Loan;

                                       23
<PAGE>

                  (xxi)    the coverage amount of any mortgage insurance;

                  (xxii)   with respect to the Lender PMI Loans, the interest
                           premium charged by the lender;

                  (xxiii)  a code indicating whether the Mortgage Loan is a
                           Delay Delivery Mortgage Loan;

                  (xxiv)   the Minimum Mortgage Rate in effect as of the Cut-off
                           Date;

                  (xxv)    a code indicating whether the Mortgage Loan is a MERS
                           Mortgage Loan; and

                  (xxvi)   the type of Prepayment Charges (Hard Prepayment
                           Charges or Soft Prepayment Charges) and the
                           Prepayment Charge Period.

The schedule shall also set forth the total of the amounts described under (v)
above for all of the Mortgage Loans and for each Loan Group.

         Mortgage Note: The original executed note or other evidence of the
indebtedness of a Mortgagor under a Mortgage Loan.

         Mortgage Rate: The annual rate of interest borne by a Mortgage Note
from time to time (net of the interest premium for any Lender PMI Loan).

         Mortgaged Property: The underlying property securing a Mortgage Loan,
which, with respect to a Cooperative Loan, is the related Co-op Shares and
Proprietary Lease.

         Mortgagor: The obligors on a Mortgage Note.

         National Cost of Funds Index: The National Monthly Median Cost of Funds
Ratio to SAIF-Insured Institutions published by the OTS.

         Net Prepayment Interest Shortfall: As to any Distribution Date and Loan
Group, the amount by which the aggregate of the Prepayment Interest Shortfalls
for such Loan Group and such Distribution Date exceeds an amount equal to the
sum of (a) the Compensating Interest allocable to such Loan Group for such
Distribution Date and (b) the excess, if any, of the Compensating Interest
allocable to the other Loan Groups for such Distribution Date over the
Prepayment Interest Shortfalls for such other Loan Groups and Distribution Date.

         Net Rate Cap: For the Class A-1 Certificates and the Interest Accrual
Period related to each Distribution Date, a fraction, expressed as a percentage,
(A) the numerator of which is the product of (1) the excess of (i) the product
of (x) the Weighted Average of the Pass-Through Rates on each Component for the
same Interest Accrual Period, weighted on the basis of their respective
Component Balances immediately prior to such Distribution Date and (y) the sum
of the Component Balance of each Component immediately prior to such
Distribution Date over (ii) any Swap Termination Payment payable to the Swap
Counterparty for that Distribution Date (which was not caused by a Swap
Counterparty Trigger Event) and (2) 12, and (B) the denominator of which is the
Class Certificate Balance of the Class A-1 Certificates immediately prior to
such Distribution Date, and adjusted to reflect the accrual of interest on an
actual/360 basis

                                       24
<PAGE>

         Net Swap Payment: With respect to the Swap Contract, any Distribution
Date and payment from the Supplemental Interest Trust to the Swap Counterparty,
the excess, if any, of the "Floating Rate II Amount" (as defined in the Swap
Contract) with respect to such Distribution Date over the "Floating Rate I
Amount" (as defined in the Swap Contract) with respect to such Distribution
Date. With respect to the Swap Contract, any Distribution Date and payment by
the Swap Counterparty to the Supplemental Interest Trust, the excess of (i) the
excess, if any, of (a) the "Floating Rate I Amount" with respect to such
Distribution Date over (b) the "Floating Rate II Amount" with respect to such
Distribution Date; over (ii) the Swap Amount for such Distribution Date.

         Non-Delay Certificates: As specified in the Preliminary Statement.

         Nonrecoverable Advance: Any portion of an Advance previously made or
proposed to be made by the Servicer, that, in the good faith judgment of the
Servicer, will not be ultimately recoverable by the Servicer from the related
Mortgagor, related Liquidation Proceeds or otherwise.

         Notice of Final Distribution: The notice to be provided pursuant to
Section 9.02 to the effect that final distribution on any of the Certificates
shall be made only upon presentation and surrender thereof.

         Notional Amount: Not applicable.

         Notional Amount Certificates: As specified in the Preliminary
Statement.

         Notional Amount Components: As specified in the Preliminary Statement.

         Offered Certificates: As specified in the Preliminary Statement.

         Officer's Certificate: A certificate (i) signed by the Chairman of the
Board, the Vice Chairman of the Board, the President, a Managing Director, a
Vice President (however denominated), an Assistant Vice President, the
Treasurer, the Secretary, or one of the Assistant Treasurers or Assistant
Secretaries of the Depositor or the Servicer, or (ii) if provided for in this
Agreement, signed by a Servicing Officer, as the case may be, and delivered to
the Depositor and the Trustee as required by this Agreement or (iii) in the case
of any other Person, signed by an authorized officer of such Person.

         One-Year CMT Index: The weekly average yield on United States Treasury
securities adjusted to a constant maturity of one year as published by the
Federal Reserve Board in Statistical Release H.15 and most recently available as
of a day specified in the related Mortgage Note.

         One-Year LIBOR Index: The average of the London interbank offered rates
for one-year U.S. dollar deposits in the London market, generally as set forth
in either The Wall Street Journal or some other source generally accepted in the
residential mortgage loan origination business and specified in the related
Mortgage Note, or, if such rate ceases to be published in The Wall Street
Journal or becomes unavailable for any reason, then based upon a new index
selected by the servicer, based on comparable information, in each case, as most
recently announced as of either 45 days prior to, or the first Business Day of
the month immediately preceding the month of, such Adjustment Date.

         Opinion of Counsel: For the interpretation or application of the REMIC
Provisions, a written opinion of counsel who (i) is in fact independent of the
Depositor and the Servicer, (ii) does not have any direct financial interest in
the Depositor or the Servicer or in any affiliate of either, and (iii) is not
connected with the Depositor or the Servicer as an officer, employee, promoter,
underwriter, trustee, partner, director, or person performing similar functions.
Otherwise, a written opinion of counsel who

                                       25
<PAGE>

may be counsel for the Depositor or the Servicer, including in-house counsel,
reasonably acceptable to the Trustee.

         Optional Termination Date: As defined in Section 9.01.

         Original Applicable Credit Support Percentage: With respect to each of
the following Classes of Subordinated Certificates, the corresponding percentage
described below:

                 Class B-1....................................    5.00%
                 Class B-2....................................    2.95%
                 Class B-3....................................    1.80%
                 Class B-4....................................    1.40%
                 Class B-5....................................    0.60%
                 Class B-6....................................    0.25%

         Original Mortgage Loan: The Mortgage Loan refinanced in connection with
the origination of a Refinance Loan.

         Original Subordinated Principal Balance: On or prior to the second
Senior Termination Date, the Subordinated Percentage of the aggregate Stated
Principal Balance of the Mortgage Loans in the related Loan Group, in each case
as of the Cut-off Date; or if such date is after the second Senior Termination
Date, the aggregate Class Certificate Balance of the Subordinated Certificates
as of the Closing Date.

         OTS: The Office of Thrift Supervision.

         Outside Reference Date: Not applicable.

         Outstanding: For the Certificates as of any date of determination, all
Certificates theretofore executed and authenticated under this Agreement except:

                  (i)      Certificates theretofore canceled by the Trustee or
                           delivered to the Trustee for cancellation; and

                  (ii)     Certificates in exchange for which or in lieu of
                           which other Certificates have been executed and
                           delivered by the Trustee pursuant to this Agreement.

         Outstanding Mortgage Loan: As of any Due Date, a Mortgage Loan with a
Stated Principal Balance greater than zero that was not the subject of a
Principal Prepayment in Full before the Due Date or during the related
Prepayment Period and that did not become a Liquidated Mortgage Loan before the
Due Date.

         Overcollateralized Group:  As defined in Section 4.03.

         Ownership Interest: As to any Residual Certificate, any ownership
interest in the Certificate including any interest in the Certificate as its
Holder and any other interest therein, whether direct or indirect, legal or
beneficial.

                                       26
<PAGE>

         Pass-Through Margin: For the Class A-1 Certificates for the Interest
Accrual Period related to any Distribution Date occurring (a) on or prior to the
first possible Optional Termination Date, 0.45%, and (b) after the first
possible Optional Termination Date, 0.90%.

         Pass-Through Rate: For each Class of Certificates, the per annum rate
set forth or calculated in the manner described in the Preliminary Statement.

         Percentage Interest: As to any Certificate, the percentage interest
evidenced thereby in distributions required to be made on the related Class, the
percentage interest being set forth on its face or equal to the percentage
obtained by dividing the Denomination of the Certificate by the aggregate of the
Denominations of all Certificates of the same Class.

         Performance Certification: As defined in Section 11.05.

         Permitted Investments: At any time, any of the following:

         (i) obligations of the United States or any agency thereof backed by
the full faith and credit of the United States;

         (ii) general obligations of or obligations guaranteed by any state of
the United States or the District of Columbia receiving the highest long-term
debt rating of each Rating Agency, or any lower rating that will not result in
the downgrading, qualification or withdrawal of the ratings then assigned to the
Certificates by the Rating Agencies, as evidenced by a signed writing delivered
by each Rating Agency;

         (iii) commercial or finance company paper that is then receiving the
highest commercial or finance company paper rating of each Rating Agency, or any
lower rating that will not result in the downgrading, qualification or
withdrawal of the ratings then assigned to the Certificates by the Rating
Agencies , as evidenced by a signed writing delivered by each Rating Agency;

         (iv) certificates of deposit, demand or time deposits, or bankers'
acceptances issued by any depository institution or trust company incorporated
under the laws of the United States or of any state thereof and subject to
supervision and examination by federal or state banking authorities, provided
that the commercial paper or long-term unsecured debt obligations of the
depository institution or trust company (or in the case of the principal
depository institution in a holding company system, the commercial paper or
long-term unsecured debt obligations of the holding company, but only if Moody's
is not a Rating Agency) are then rated one of the two highest long-term and the
highest short-term ratings of each Rating Agency for the securities, or any
lower rating that will not result in the downgrading, qualification or
withdrawal of the ratings then assigned to the Certificates by the Rating
Agencies, as evidenced by a signed writing delivered by each Rating Agency;

         (v) demand or time deposits or certificates of deposit issued by any
bank or trust company or savings institution to the extent that the deposits are
fully insured by the FDIC;

         (vi) guaranteed reinvestment agreements issued by any bank, insurance
company, or other corporation acceptable to the Rating Agencies at the time of
the issuance of the agreements, as evidenced by a signed writing delivered by
each Rating Agency;

         (vii) repurchase obligations with respect to any security described in
clauses (i) and (ii) above, in either case entered into with a depository
institution or trust company (acting as principal) described in

                                       27
<PAGE>

clause (iv) above; provided that such repurchase obligation would be accounted
for as a financing arrangement under generally accepted accounting principles;

         (viii) securities (other than stripped bonds, stripped coupons, or
instruments sold at a purchase price in excess of 115% of their face amount)
bearing interest or sold at a discount issued by any corporation incorporated
under the laws of the United States or any state thereof that, at the time of
the investment, have one of the two highest ratings of each Rating Agency
(except if the Rating Agency is Moody's the rating shall be the highest
commercial paper rating of Moody's for the securities), or any lower rating that
will not result in the downgrading, qualification or withdrawal of the ratings
then assigned to the Certificates by the Rating Agencies, as evidenced by a
signed writing delivered by each Rating Agency and that have a maturity date
occurring no more than 365 days from their date of issuance;

         (ix) units of a taxable money-market portfolio having the highest
rating assigned by each Rating Agency (except (i) if Fitch is a Rating Agency
and has not rated the portfolio, the highest rating assigned by Moody's and (ii)
if S&P is a Rating Agency, "AAAm" or "AAAM-G" by S&P) and restricted to
obligations issued or guaranteed by the United States of America or entities
whose obligations are backed by the full faith and credit of the United States
of America and repurchase agreements collateralized by such obligations; and

         (x) any other investments bearing interest or sold at a discount
acceptable to each Rating Agency that will not result in the downgrading,
qualification or withdrawal of the ratings then assigned to the Certificates by
the Rating Agencies, as evidenced by a signed writing delivered by each Rating
Agency.

         No Permitted Investment may (i) evidence the right to receive interest
only payments with respect to the obligations underlying the instrument, (ii) be
sold or disposed of before its maturity or (iii) be any obligation of the Seller
or any of its Affiliates. Any Permitted Investment shall be relatively risk free
and no options or voting rights shall be exercised with respect to any Permitted
Investment. Any Permitted Investment shall be sold or disposed of in accordance
with Financial Accounting Standard 140, paragraph 35c(6) in effect as of the
Closing Date.

         Permitted Transferee: Any person other than

         (i) the United States, any State or political subdivision thereof, or
any agency or instrumentality of any of the foregoing,

         (ii) a foreign government, International Organization, or any agency or
instrumentality of either of the foregoing,

         (iii) an organization (except certain farmers' cooperatives described
in section 521 of the Code) that is exempt from tax imposed by Chapter 1 of the
Code (including the tax imposed by section 511 of the Code on unrelated business
taxable income) on any excess inclusions (as defined in section 860E(c)(1) of
the Code) with respect to any Residual Certificate,

         (iv) a rural electric and telephone cooperatives described in section
1381(a)(2)(C) of the Code,

         (v) an "electing large partnership" as defined in section 775 of the
Code,

         (vi) a Person that is not a U.S. Person, and

                                       28
<PAGE>

         (vii) any other Person so designated by the Depositor based on an
Opinion of Counsel that the Transfer of an Ownership Interest in a Residual
Certificate to the Person may cause any REMIC to fail to qualify as a REMIC at
any time that the Certificates are outstanding.

         Person: Any individual, corporation, partnership, joint venture,
association, limited liability company, joint-stock company, trust,
unincorporated organization, or government, or any agency or political
subdivision thereof.

         Physical Certificates: As specified in the Preliminary Statement.

         Planned Balance: Not applicable.

         Planned Principal Classes: As specified in the Preliminary Statement.

         Pool Stated Principal Balance: The aggregate Stated Principal Balance
of the Mortgage Loans.

         Preemptive Loan Modification: As defined in Section 3.06(a).

         Prepayment Amount: As to any Distribution Date and Loan Group, all
partial and full Principal Prepayments on the Mortgage Loans in that Loan Group
received during the related Prepayment Period.

         Prepayment Assumption: The prepayment model used in the Prospectus
Supplement.

         Prepayment Charge: As to a Mortgage Loan, either a Hard Prepayment
Charge or a Soft Prepayment Charge, as identified on the Mortgage Loan Schedule.

         Prepayment Charge Period: As to any Mortgage Loan, the period of time
during which a Prepayment Charge may be imposed.

         Prepayment Interest Excess: As to any Principal Prepayment received by
the Servicer on a Mortgage Loan from the first day through the fifteenth day of
any calendar month other than the month of the Cut-off Date, all amounts paid by
the related Mortgagor in respect of interest on such Principal Prepayment. All
Prepayment Interest Excess shall be retained by the Servicer as additional
servicing compensation.

         Prepayment Interest Shortfall: As to any Distribution Date, Mortgage
Loan and Principal Prepayment received on or after the sixteenth day of the
month preceding the month of such Distribution Date (or, in the case of the
first Distribution Date, on or after the Cut-off Date) and on or before the last
day of the month preceding the month of such Distribution Date, the amount, if
any, by which one month's interest at the related Mortgage Rate, net of the
Servicing Fee Rate, on such Principal Prepayment exceeds the amount of interest
paid in connection with such Principal Prepayment.

         Prepayment Period: As to any Distribution Date and related Due Date,
the period from and including the 16th day of the month immediately prior to the
month of such Distribution Date (or, in the case of the first Distribution Date,
from the Cut-off Date) and to and including the 15th day of the month of such
Distribution Date.

         Prepayment Shift Percentage: Not applicable.

         Primary Insurance Policy: Each policy of primary mortgage guaranty
insurance or any replacement policy therefor with respect to any Mortgage Loan.

         Principal Amount: As to any Distribution Date and each Loan Group, the
sum of (a) all monthly payments of principal due on each Mortgage Loan in that
Loan Group on the related Due Date, (b) the principal portion of the Purchase
Price of each Mortgage Loan in that Loan Group that was repurchased by the
Seller pursuant to this Agreement as of such Distribution Date, excluding any
Mortgage Loan that was purchased by the Servicer as provided in Section 3.12,
(c) the Substitution Adjustment Amount in connection with any Deleted Mortgage
Loan in that Loan Group received with respect to such

                                       29
<PAGE>

Distribution Date, (d) any Insurance Proceeds or Liquidation Proceeds allocable
to recoveries of principal of Mortgage Loans in that Loan Group that are not yet
Liquidated Mortgage Loans received during the calendar month preceding the month
of such Distribution Date, (e) with respect to each Mortgage Loan in that Loan
Group that became a Liquidated Mortgage Loan during the calendar month preceding
the month of such Distribution Date, the amount of Liquidation Proceeds
allocable to principal received with respect to such Mortgage Loan, (f) the
Prepayment Amount for that Loan Group received during the related Prepayment
Period, and (g) any Subsequent Recoveries with respect to the Mortgage Loans in
that Loan Group received during the calendar month preceding the month of such
Distribution Date.

         Principal Only Certificates: As specified in the Preliminary Statement.

         Principal Prepayment: Any payment of principal by a Mortgagor on a
Mortgage Loan (including the principal portion of the Purchase Price of any
Mortgage Loan purchased by the Servicer pursuant to Section 3.12) that is
received in advance of its scheduled Due Date and is not accompanied by an
amount representing scheduled interest due on any date in any month after the
month of prepayment. The Servicer shall apply partial Principal Prepayments in
accordance with the related Mortgage Note.

         Principal Prepayment in Full: Any Principal Prepayment made by a
Mortgagor of the entire principal balance of a Mortgage Loan.

         Principal Relocation Payment: A payment from any Loan Group to REMIC 1
Interests other than those of their corresponding Loan Group as provided in the
Preliminary Statement. Principal Relocation Payments shall be made of principal
allocations comprising the Principal Amount from a Loan Group.

         Private Certificates: As specified in the Preliminary Statement.

         Pro Rata Share: As to any Distribution Date and any Class of
Subordinated Certificates, the portion of the Subordinated Principal
Distribution Amount allocable to such Class, equal to the product of the
Subordinated Principal Distribution Amount on such Distribution Date and a
fraction, the numerator of which is the related Class Certificate Balance
thereof and the denominator of which is the aggregate Class Certificate Balance
of the Subordinated Certificates, in each case immediately prior to such
Distribution Date.

         Proprietary Lease: For any Cooperative Unit, a lease or occupancy
agreement between a Cooperative Corporation and a holder of related Co-op
Shares.

         Prospectus Supplement: The Prospectus Supplement dated November 29,
2007, relating to the Offered Certificates, and any supplement to the Prospectus
Supplement.

         PUD: Planned Unit Development.

         Purchase Price: For any Mortgage Loan required to be purchased by the
Seller pursuant to Section 2.02 or 2.03 or purchased by the Servicer pursuant to
Section 3.12, the sum of

         (i) 100% of the unpaid principal balance of the Mortgage Loan on the
date of the purchase,

         (ii) accrued and unpaid interest on the Mortgage Loan at the applicable
Mortgage Rate (or at the applicable Adjusted Mortgage Rate if (x) the purchaser
is the Servicer or (y) if the purchaser is the Seller and the Seller is the
Servicer) from the date through which interest was last paid by the Mortgagor

                                       30
<PAGE>

to the Due Date in the month in which the Purchase Price is to be distributed to
Certificateholders, net of any unreimbursed Advances made by the Servicer on the
Mortgage Loan, and

         (iii) any costs and damages incurred by the Trust Fund in connection
with any violation by the Mortgage Loan of any predatory or abusive lending law.

         If the Mortgage Loan is purchased pursuant to Section 3.12, the
interest component of the Purchase Price shall be computed (i) on the basis of
the applicable Adjusted Mortgage Rate before giving effect to the related
modification and (ii) from the date to which interest was last paid to the date
on which the Mortgage Loan is assigned to the Servicer pursuant to Section 3.12.

         Qualified Insurer: A mortgage guaranty insurance company duly qualified
as such under the laws of the state of its principal place of business and each
state having jurisdiction over the insurer in connection with the insurance
policy issued by the insurer, duly authorized and licensed in such states to
transact a mortgage guaranty insurance business in such states and to write the
insurance provided by the insurance policy issued by it, approved as a FNMA- or
FHLMC-approved mortgage insurer or having a claims paying ability rating of at
least "AA" or equivalent rating by a nationally recognized statistical rating
organization. Any replacement insurer with respect to a Mortgage Loan must have
at least as high a claims paying ability rating as the insurer it replaces had
on the Closing Date.

         Rating Agency: Each of the Rating Agencies specified in the Preliminary
Statement. If any of them or a successor is no longer in existence, "Rating
Agency" shall be the nationally recognized statistical rating organization, or
other comparable Person, designated by the Depositor and identified as a "Rating
Agency" in the Underwriters' Exemption, notice of which designation shall be
given to the Trustee. References to a given rating or rating category of a
Rating Agency means the rating category without giving effect to any modifiers.

         Realized Loss: With respect to each Liquidated Mortgage Loan, an amount
(not less than zero or more than the Stated Principal Balance of the Mortgage
Loan) as of the date of such liquidation, equal to (i) the Stated Principal
Balance of the Liquidated Mortgage Loan as of the date of such liquidation, plus
(ii) interest at the Adjusted Net Mortgage Rate from the Due Date as to which
interest was last paid or advanced (and not reimbursed) to Certificateholders up
to the Due Date in the month in which Liquidation Proceeds are required to be
distributed on the Stated Principal Balance of such Liquidated Mortgage Loan
from time to time, minus (iii) the Liquidation Proceeds, if any, received during
the month in which such liquidation occurred, to the extent applied as
recoveries of interest at the Adjusted Net Mortgage Rate and to principal of the
Liquidated Mortgage Loan. With respect to each Mortgage Loan which has become
the subject of a Deficient Valuation, if the principal amount due under the
related Mortgage Note has been reduced, the difference between the principal
balance of the Mortgage Loan outstanding immediately prior to such Deficient
Valuation and the principal balance of the Mortgage Loan as reduced by the
Deficient Valuation. With respect to each Mortgage Loan that has become the
subject of a Debt Service Reduction and any Distribution Date, the amount, if
any, by which the principal portion of the related Scheduled Payment has been
reduced. With respect to each Mortgage Loan that became the subject of a Loan
Modification that resulted in a permanent reduction of its Stated Principal
Balance, the amount of that reduction.

         To the extent the Servicer receives Subsequent Recoveries with respect
to any Mortgage Loan, the amount of the Realized Loss with respect to that
Mortgage Loan will be reduced by such Subsequent Recoveries.

         Recognition Agreement: For any Cooperative Loan, an agreement between
the Cooperative Corporation and the originator of the Mortgage Loan that
establishes the rights of the originator in the Cooperative Property.

                                       31
<PAGE>

         Record Date: With respect to any Distribution Date and any Definitive
Certificate and the Delay Certificates, the close of business on the last
Business Day of the month preceding the month of that Distribution Date. With
respect to any Distribution Date and the LIBOR Certificates as long as they are
Book-Entry Certificates, the Business Day immediately prior to such Distribution
Date.

         Reference Bank: As defined in Section 4.07.

         Refinance Loan: Any Mortgage Loan the proceeds of which are used to
refinance an Original Mortgage Loan.

         Regular Certificates: As specified in the Preliminary Statement.

         Regulation AB: Subpart 229.1100 - Asset Backed Securities (Regulation
AB), 17 C.F.R. ss.ss.229.1100-229.1123, as such may be amended from time to
time, and subject to such clarification and interpretation as have been provided
by the Commission in the adopting release (Asset-Backed Securities, Securities
Act Release No. 33-8518, 70 Fed. Reg. 1,506, 1,531 (Jan. 7, 2005)) or by the
staff of the Commission, or as may be provided by the Commission or its staff
from time to time.

         Relief Act: The Servicemembers Civil Relief Act.

         Relief Act Reductions: With respect to any Distribution Date and any
Mortgage Loan as to which there has been a reduction in the amount of interest
collectible thereon for the most recently ended calendar month as a result of
the application of the Relief Act or any similar state or local laws, the
amount, if any, by which (i) interest collectible on such Mortgage Loan for the
most recently ended calendar month is less than (ii) interest accrued thereon
for such month pursuant to the Mortgage Note.

         REMIC: A "real estate mortgage investment conduit" within the meaning
of section 860D of the Code.

         REMIC Provisions: Provisions of the federal income tax law relating to
real estate mortgage investment conduits, which appear at sections 860A through
860G of Subchapter M of Chapter 1 of the Code, and related provisions, and
regulations promulgated thereunder, as the foregoing may be in effect from time
to time as well as provisions of applicable state laws.

         REO Property: A Mortgaged Property acquired by the Trust Fund through
foreclosure or deed-in-lieu of foreclosure in connection with a defaulted
Mortgage Loan.

         Reportable Event: Any event required to be reported on Form 8-K, and in
any event, the following:

         (a) entry into a definitive agreement related to the Trust Fund, the
Certificates or the Mortgage Loans, or an amendment to a Transaction Document,
even if the Depositor is not a party to such agreement (e.g., a servicing
agreement with a servicer contemplated by Item 1108(a)(3) of Regulation AB);

         (b) termination of a Transaction Document (other than by expiration of
the agreement on its stated termination date or as a result of all parties
completing their obligations under such agreement), even if the Depositor is not
a party to such agreement (e.g., a servicing agreement with a servicer
contemplated by Item 1108(a)(3) of Regulation AB);

                                       32
<PAGE>

         (c) with respect to the Servicer only, if the Servicer becomes aware of
any bankruptcy or receivership with respect to the Seller, the Depositor, the
Servicer, the Trustee, the Swap Counterparty, any enhancement or support
provider contemplated by Items 1114(b) or 1115 of Regulation AB, or any other
material party contemplated by Item [1101(d)(1)] of Regulation AB;

         (d) with respect to the Trustee, the Servicer and the Depositor only,
the occurrence of an early amortization, performance trigger or other event,
including an Event of Default under this Agreement;

         (e) any amendment to this Agreement;

         (f) the resignation, removal, replacement, substitution of the Servicer
or the Trustee;

         (g) with respect to the Servicer only, if the Servicer becomes aware
that (i) any material enhancement or support specified in Item 1114(a)(1)
through (3) of Regulation AB or Item 1115 of Regulation AB that was previously
applicable regarding one or more Classes of the Certificates has terminated
other than by expiration of the contract on its stated termination date or as a
result of all parties completing their obligations under such agreement; (ii)
any material enhancement specified in Item 1114(a)(1) through (3) of Regulation
AB or Item 1115 of Regulation AB has been added with respect to one or more
Classes of the Certificates; or (iii) any existing material enhancement or
support specified in Item 1114(a)(1) through (3) of Regulation AB or Item 1115
of Regulation AB with respect to one or more Classes of the Certificates has
been materially amended or modified; and

         (h) with respect to the Trustee, the Servicer and the Depositor only, a
required distribution to Holders of the Certificates is not made as of the
required Distribution Date under this Agreement.

         Reporting Date: As to any Distribution Date, the 18th day of the month
of such Distribution Date or if that day is not a Business Day the next Business
Day.

         Reporting Subcontractor: With respect to the Servicer or the Trustee,
any Subcontractor determined by such Person pursuant to Section 11.08(b) to be
"participating in the servicing function" within the meaning of Item 1122 of
Regulation AB. References to a Reporting Subcontractor shall refer only to the
Subcontractor of such Person and shall not refer to Subcontractors generally.

         Request for Release: The Request for Release submitted by the Servicer
to the Trustee, substantially in the form of Exhibits M and N, as appropriate.

         Required Insurance Policy: For any Mortgage Loan, any insurance policy
that is required to be maintained from time to time under this Agreement.

         Residual Certificates: As specified in the Preliminary Statement.

         Responsible Officer: When used with respect to the Trustee, any
Managing Director, any Director, Vice President, any Assistant Vice President,
any Associate, any Assistant Secretary, any Trust Officer, or any other officer
of the Trustee customarily performing functions similar to those performed by
any of the above designated officers who at such time shall be officers to whom,
with respect to a particular matter, the matter is referred because of the
officer's knowledge of and familiarity with the particular subject and who has
direct responsibility for the administration of this Agreement.

         Restricted Classes: As defined in Section 4.02(e).

                                       33
<PAGE>

         Reuters Page LIBOR01: The display page designated as the "LIBOR01" page
on Reuters (or any page replacing that page on that service for the purpose of
displaying London inter-bank offered rates of major banks).

         SAIF: The Savings Association Insurance Fund, or any successor thereto.

         Sarbanes-Oxley Certification: As defined in Section 11.05.

         S&P: Standard & Poor's, a division of The McGraw-Hill Companies, Inc.
If S&P is designated as a Rating Agency in the Preliminary Statement, for
purposes of Section 10.05(b) the address for notices to S&P shall be Standard &
Poor's, a division of The McGraw-Hill Companies, Inc., 55 Water Street, New
York, New York 10041, Attention: Mortgage Surveillance Monitoring, or any other
address that S&P furnishes to the Depositor and the Servicer.

         Scheduled Balance: Not applicable.

         Scheduled Classes: As specified in the Preliminary Statement.

         Scheduled Payment: The scheduled monthly payment on a Mortgage Loan due
on any Due Date allocable to principal and/or interest on such Mortgage Loan
which, unless otherwise specified herein, shall give effect to any related Debt
Service Reduction and any Deficient Valuation that affects the amount of the
monthly payment due on such Mortgage Loan.

         Securities Act: The Securities Act of 1933, as amended.

         Security Agreement: For any Cooperative Loan, the agreement between the
owner of the related Co-op Shares and the originator of the related Mortgage
Note that defines the security interest in the Co-op Shares and the related
Proprietary Lease.

         Seller: IndyMac Bank, F.S.B., a federal savings bank, and its
successors and assigns, in its capacity as seller of the Mortgage Loans to the
Depositor.

         Senior Certificate Group: As specified in the Preliminary Statement.

         Senior Certificates: As specified in the Preliminary Statement.

         Senior Credit Support Depletion Date: The date on which the Class
Certificate Balance of each Class of Subordinated Certificates has been reduced
to zero.

         Senior Percentage: As to any Senior Certificate Group and Distribution
Date, the percentage equivalent (not greater than 100%) of a fraction the
numerator of which is the aggregate Class Certificate Balance of the Senior
Certificates of such Senior Certificate Group immediately before the
Distribution Date and the denominator of which is the aggregate Stated Principal
Balance of the Mortgage Loans in the related Loan Group as of the Due Date
occurring in the month prior to the month of that Distribution Date (after
giving effect to Principal Prepayments received on the related Mortgage Loans in
the Prepayment Period related to such prior Due Date); provided, however, that
on any Distribution Date after the second Senior Termination Date, the Senior
Percentage for the Senior Certificates of the remaining Senior Certificate Group
is the percentage equivalent (not greater than 100%) of a fraction, the
numerator of which is the aggregate Class Certificate Balance of the Senior
Certificates of such remaining Senior Certificate Group immediately prior to
such Distribution Date and the denominator is the

                                       34
<PAGE>

aggregate Class Certificate Balance of all Classes of Certificates immediately
prior to that Distribution Date.

         Senior Prepayment Percentage: As to a Senior Certificate Group and any
Distribution Date during the seven years beginning on the first Distribution
Date, 100%. The related Senior Prepayment Percentage for any Distribution Date
occurring on or after the seventh anniversary of the first Distribution Date
will, except as provided in this Agreement, be as follows: for any Distribution
Date in the first year thereafter, the related Senior Percentage plus 70% of the
related Subordinated Percentage for such Distribution Date; for any Distribution
Date in the second year thereafter, the related Senior Percentage plus 60% of
the related Subordinated Percentage for such Distribution Date; for any
Distribution Date in the third year thereafter, the related Senior Percentage
plus 40% of the related Subordinated Percentage for such Distribution Date; for
any Distribution Date in the fourth year thereafter, the related Senior
Percentage plus 20% of the related Subordinated Percentage for such Distribution
Date; and for any Distribution Date thereafter, the related Senior Percentage
for such Distribution Date (unless on any Distribution Date the Senior
Percentage of a Senior Certificate Group exceeds the initial Senior Percentage
for such Senior Certificate Group in which case the Senior Prepayment Percentage
for each Senior Certificate Group for such Distribution Date will once again
equal 100%). Notwithstanding the foregoing, no decrease in any Senior Prepayment
Percentage will occur unless both Senior Step Down Conditions are satisfied with
respect to all of the Mortgage Loans.

         Notwithstanding the preceding paragraphs, if (x) on or before the
Distribution Date in November 2010, the Aggregate Subordinated Percentage is at
least 200% of the Aggregate Subordinated Percentage as of the Closing Date, the
delinquency test set forth in the definition of Senior Step Down Conditions is
satisfied and cumulative Realized Losses do not exceed 20% of the aggregate
Class Certificate Balance of the Subordinated Certificates as of the Closing
Date, the Senior Prepayment Percentage for each Senior Certificate Group will
equal the related Senior Percentage for that Distribution Date plus 50% of an
amount equal to 100% minus the related Senior Percentage for that Distribution
Date and (y) after the Distribution Date in November 2010, the Aggregate
Subordinated Percentage is at least 200% of the Aggregate Subordinated
Percentage as of the Closing Date, the delinquency test set forth in the
definition of Senior Step Down Conditions is satisfied and cumulative Realized
Losses do not exceed 30% of the aggregate Class Certificate Balance of the
Subordinated Certificates as of the Closing Date, the Senior Prepayment
Percentage for each Senior Certificate Group will equal the related Senior
Percentage.

         Senior Principal Distribution Amount: As to any Distribution Date and
any Loan Group, the sum of (i) the related Senior Percentage of all amounts
described in clauses (a) through (d) of the definition of Principal Amount for
that Loan Group and such Distribution Date, (ii) with respect to any Mortgage
Loan that became a Liquidated Mortgage Loan during the calendar month preceding
the month of such Distribution Date, the lesser of (x) the related Senior
Percentage of the Stated Principal Balance of such Mortgage Loan and (y) the
related Senior Prepayment Percentage of the amount of the Liquidation Proceeds
allocable to principal received on the Mortgage Loan, and (iii) the sum of (x)
the Senior Prepayment Percentage of the amounts described in clause (f) of the
definition of Principal Amount for that Loan Group and such Distribution Date,
and (y) the applicable Senior Prepayment Percentage of any Subsequent Recoveries
described in clause (g) of the definition of Principal Amount for that Loan
Group and such Distribution Date; provided, however, on any Distribution Date
after the second Senior Termination Date, the Senior Principal Distribution
Amount for the remaining Senior Certificate Group will be calculated pursuant to
the above formula based on all the Mortgage Loans in the Mortgage Pool, as
opposed to the Mortgage Loans in the related Loan Group.

         Senior Step Down Conditions: As to any Distribution Date: (i) the
aggregate Stated Principal Balance of all the Mortgage Loans in a Loan Group
that are either (x) 60 days or more Delinquent (averaged over the preceding six
month period) (including any Mortgage Loans subject to foreclosure

                                       35
<PAGE>

proceedings, REO Property (regardless of whether that Mortgage Loan is 60 days
or more Delinquent) and Mortgage Loans the Mortgagors of which are in bankruptcy
but excluding Mortgage Loans referred to in clause (y)) or (y) the subject of a
modification during the preceding 12-month period other than a modification in
lieu of refinancing, as a percentage of (a) if such date is on or prior to
second Senior Termination Date, the Subordinated Percentage for that Loan Group
of the aggregate Stated Principal Balance of the Mortgage Loans in that Loan
Group, or (b) if such date is after the second Senior Termination Date, the
aggregate Class Certificate Balance of the Subordinated Certificates immediately
prior to such Distribution Date, does not equal or exceed 50%, and (ii) the sum
of (x) the cumulative Realized Losses for such Loan Group and (y) the aggregate
amount of accrued interest that has been forgiven in connection with
modifications of the Mortgage Loans in such Loan Group, in each case from the
Cut-off Date through the last day of the related Due Period, do not exceed: (a)
commencing with the Distribution Date on the seventh anniversary of the first
Distribution Date, 30% of the Original Subordinated Principal Balance, (b)
commencing with the Distribution Date on the eighth anniversary of the first
Distribution Date, 35% of the Original Subordinated Principal Balance, (c)
commencing with the Distribution Date on the ninth anniversary of the first
Distribution Date, 40% of the Original Subordinated Principal Balance, (d)
commencing with the Distribution Date on the tenth anniversary of the first
Distribution Date, 45% of the Original Subordinated Principal Balance, and (e)
commencing with the Distribution Date on the eleventh anniversary of the first
Distribution Date and thereafter, 50% of the Original Subordinated Principal
Balance.

         Senior Termination Date: For each Senior Certificate Group, the
Distribution Date on which the aggregate Class Certificate Balance and Component
Balance of the related Classes and Component of Senior Certificates has been
reduced to zero.

         Servicer: IndyMac Bank, F.S.B., a federal savings bank, and its
successors and assigns, in its capacity as servicer under this Agreement.

         Servicer Advance Date: As to any Distribution Date, 12:30 P.M. Pacific
time on the Business Day preceding that Distribution Date.

         Servicing Advances: All customary, reasonable, and necessary "out of
pocket" costs and expenses incurred in the performance by the Servicer of its
servicing obligations, including the cost of

                  (a) the preservation, restoration, and protection of a
         Mortgaged Property,

                  (b) expenses reimbursable to the Servicer pursuant to Section
         3.12 and any enforcement or judicial proceedings, including
         foreclosures,

                  (c) the maintenance and liquidation of any REO Property,

                  (d) compliance with the obligations under Section 3.10, and

                  (e) reasonable compensation to the Servicer or its affiliates
         for acting as broker in connection with the sale of foreclosed
         Mortgaged Properties and for performing certain default management and
         other similar services (including appraisal services) in connection
         with the servicing of defaulted Mortgage Loans. For purposes of this
         clause (e), only costs and expenses incurred in connection with the
         performance of activities generally considered to be outside the scope
         of customary servicing or master servicing duties shall be treated as
         Servicing Advances.

         Servicing Criteria: The "servicing criteria" set forth in Item 1122(d)
of Regulation AB.

                                       36
<PAGE>

         Servicing Fee: As to each Mortgage Loan and any Distribution Date, one
month's interest at the applicable Servicing Fee Rate on the Stated Principal
Balance of the Mortgage Loan as of the Due Date in the month preceding the month
of such Distribution Date or, whenever a payment of interest accompanies a
Principal Prepayment in Full made by the Mortgagor, interest at the Servicing
Fee Rate on the Stated Principal Balance of the Mortgage Loan for the period
covered by the payment of interest, subject to reduction as provided in Section
3.15.

         Servicing Fee Rate: For each Mortgage Loan, 0.375% per annum.

         Servicing Officer: Any officer of the Servicer involved in, or
responsible for, the administration and servicing of the Mortgage Loans whose
name and facsimile signature appear on a list of servicing officers furnished to
the Trustee by the Servicer on the Closing Date pursuant to this Agreement, as
the list may from time to time be amended.

         Servicing Standard: That degree of skill and care exercised by the
Servicer with respect to mortgage loans comparable to the Mortgage Loans
serviced by the Servicer for itself or others.

         Six-Month LIBOR Index: The average of the London interbank offered
rates for six month U.S. dollar deposits in the London market, generally as set
forth in either The Wall Street Journal or some other source generally accepted
in the residential mortgage loan origination business and specified in the
related Mortgage Note or, if such rate ceases to be published in The Wall Street
Journal or becomes unavailable for any reason, then based upon a new index
selected by the Servicer, based on comparable information, in each case, as most
recently announced as of either 45 days prior to, or the first Business Day of
the month immediately preceding the month of, such Adjustment Date.

         Soft Prepayment Charges: As to a Mortgage Loan, any charge payable by a
Mortgagor in connection with certain partial Principal Prepayments and all
Principal Prepayments in Full made within the related Prepayment Charge Period
other than as a result of selling the Mortgaged Property, the Soft Prepayment
Charges with respect to each applicable Mortgage Loan so held by the Trust Fund
being identified in the Mortgage Loan Schedule.

         Special Hazard Coverage Termination Date: The point in time at which
the Special Hazard Loss Coverage Amount is reduced to zero.

         Special Hazard Loss: Any Realized Loss suffered by a Mortgaged Property
on account of direct physical loss, but not including (i) any loss of a type
covered by a hazard insurance policy or a flood insurance policy required to be
maintained with respect to such Mortgaged Property pursuant to Section 3.10 to
the extent of the amount of such loss covered thereby, or (ii) any loss caused
by or resulting from:

                  (a) normal wear and tear;

                  (b) fraud, conversion or other dishonest act on the part of
         the Trustee, the Servicer or any of their agents or employees (without
         regard to any portion of the loss not covered by any errors and
         omissions policy);

                  (c) errors in design, faulty workmanship or faulty materials,
         unless the collapse of the property or a part thereof ensues and then
         only for the ensuing loss;

                  (d) nuclear or chemical reaction or nuclear radiation or
         radioactive or chemical contamination, all whether controlled or
         uncontrolled, and whether such loss be direct or indirect,

                                       37
<PAGE>

         proximate or remote or be in whole or in part caused by, contributed to
         or aggravated by a peril covered by the definition of the term "Special
         Hazard Loss";

                  (e) hostile or warlike action in time of peace and war,
         including action in hindering, combating or defending against an
         actual, impending or expected attack:

                           1. by any government or sovereign power, de jure or
                  de facto, or by any authority maintaining or using military,
                  naval or air forces; or

                           2. by military, naval or air forces; or

                           3. by an agent of any such government, power,
                  authority or forces;

                  (f) any weapon of war employing nuclear fission, fusion or
         other radioactive force, whether in time of peace or war; or

                  (g) insurrection, rebellion, revolution, civil war, usurped
         power or action taken by governmental authority in hindering, combating
         or defending against such an occurrence, seizure or destruction under
         quarantine or customs regulations, confiscation by order of any
         government or public authority, or risks of contraband or illegal
         transportation or trade.

         Special Hazard Loss Coverage Amount: Not applicable.

         Special Hazard Mortgage Loan: A Liquidated Mortgage Loan as to which a
Special Hazard Loss has occurred.

         Startup Day: The Closing Date.

         Stated Principal Balance: As to any Mortgage Loan and Due Date, the
unpaid principal balance of such Mortgage Loan as of such Due Date, as specified
in the amortization schedule at the time relating thereto (before any adjustment
to such amortization schedule by reason of any moratorium or similar waiver or
grace period) after giving effect to the sum of: (i) the payment of principal
due on such Due Date and irrespective of any delinquency in payment by the
related Mortgagor and (ii) any Liquidation Proceeds allocable to principal
received in the prior calendar month and Principal Prepayments received through
the last day of the Prepayment Period in which the Due Date occurs, in each case
with respect to such Mortgage Loan.

         Subcontractor: Any vendor, subcontractor or other Person that is not
responsible for the overall servicing (as "servicing" is commonly understood by
participants in the mortgage-backed securities market) of Mortgage Loans but
performs one or more discrete functions identified in Item 1122(d) of Regulation
AB with respect to the Mortgage Loans under the direction or authority of the
Servicer or the Trustee, as the case may be.

         Subordinate Pass-Through Rate: As to any Class of Subordinated
Certificates and the Interest Accrual Period for any Distribution Date, a per
annum rate equal to (a) the sum of the following for each Loan Group: the
product of (x) the related Subordinated Portion immediately prior to that
Distribution Date and (y) the Weighted Average Adjusted Net Mortgage Rate for
that Loan Group and Distribution Date divided by (b) the sum of the Subordinated
Portion for each Loan Group immediately prior to that Distribution Date.

         Subordinated Certificates: As specified in the Preliminary Statement.

                                       38
<PAGE>

         Subordinated Portion: For any Loan Group and Distribution Date, the
excess, if any, of the aggregate of the Stated Principal Balance of each
Mortgage Loan in that Loan Group as of the first day of the related Due Period
(after giving effect to Principal Prepayments received on the related Mortgage
Loans in the Prepayment Period), over the aggregate Class Certificate Balance of
the Senior Certificates of the related Senior Certificate Group immediately
before that Distribution Date.

         Subordinated Percentage: As to any Distribution Date on or prior to the
second Senior Termination Date and any Loan Group, 100% minus the Senior
Percentage for the Senior Certificate Group relating to such Loan Group for such
Distribution Date. As to any Distribution Date after the second Senior
Termination Date, 100% minus the Senior Percentage for such Distribution Date.

         Subordinated Prepayment Percentage: As to any Distribution Date and
Loan Group, 100% minus the related Senior Prepayment Percentage for such
Distribution Date.

         Subordinated Principal Distribution Amount: As to any Distribution Date
and Loan Group, the sum of the following with respect to each Loan Group: (i)
the Subordinated Percentage of all amounts described in clauses (a) through (d)
of the definition of Principal Amount with respect to such Loan Group and such
Distribution Date, (ii) with respect to any Mortgage Loan in the related Loan
Group that became a Liquidated Mortgage Loan during the calendar month preceding
the month of such Distribution Date, the amount of Liquidation Proceeds
allocable to principal received with respect thereto remaining after application
thereof pursuant to clause (ii) of the definition of Senior Principal
Distribution Amount for that Loan Group, up to the related Subordinated
Percentage of the Stated Principal Balance of such Mortgage Loan and (iii) the
sum of the Subordinated Prepayment Percentage of the amounts described in
clauses (f) and (g) of the definition of Principal Amount with respect to that
Loan Group for such Distribution Date; provided, however, that on any
Distribution Date after the second Senior Termination Date, the Subordinated
Principal Distribution Amount will not be calculated by Loan Group but will
equal the amount calculated pursuant to the formula set forth above based on the
applicable Subordinated Percentage and Subordinated Prepayment Percentage for
the Subordinated Certificates for such Distribution Date with respect to all of
the Mortgage Loans as opposed to the Mortgage Loans only in the related Loan
Group.

         Subsequent Recoveries: As to any Distribution Date, with respect to a
Liquidated Mortgage Loan that resulted in a Realized Loss in a prior calendar
month, unexpected amounts received by the Servicer (net of any related expenses
permitted to be reimbursed pursuant to Section 3.09) specifically related to
such Liquidated Mortgage Loan.

         Substitute Mortgage Loan: A Mortgage Loan substituted by the Seller for
a Deleted Mortgage Loan that must, on the date of substitution, as confirmed in
a Request for Release, substantially in the form of Exhibit M,

         (i) have a Stated Principal Balance, after deduction of the principal
portion of the Scheduled Payment due in the month of substitution, not in excess
of, and not more than 10% less than, the Stated Principal Balance of the Deleted
Mortgage Loan (unless the amount of any shortfall is deposited by the Seller in
the Certificate Account and held for distribution to the Certificateholders on
the related Distribution Date);

         (ii) have a Mortgage Rate no lower than and not more than 1% per annum
higher than the Deleted Mortgage Loan;

         (iii) have a Maximum Mortgage Rate not more than 1% per annum higher
than and not lower than the Maximum Mortgage Rate of the deleted Mortgage Loan;

                                       39
<PAGE>

         (iv) have the same Mortgage Index and interval between Adjustment Dates
as the Deleted Mortgage Loan and a Gross Margin not more than 1% per annum
higher than, and not lower than that of the Deleted Mortgage Loans;

         (vi) have a Loan-to-Value Ratio no higher than that of the Deleted
Mortgage Loan;

         (vii) have a remaining term to maturity no greater than one year more
than (and not more than one year less than) that of the Deleted Mortgage Loan,
provided that the aggregate Stated Principal Balance of such Substitute Mortgage
Loans with a remaining term to maturity greater than that of the Deleted
Mortgage Loan may not exceed 5% of the Cut-off Date Pool Principal Balance;

         (viii) not be a Cooperative Loan unless the Deleted Mortgage Loan was a
Cooperative Loan; and

         (ix) comply with each representation and warranty in Section 2.03.

         Substitution Adjustment Amount: As defined in Section 2.03.

         Supplemental Interest Trust: The trust fund established by Section
4.08.

         Supplemental Interest Trustee: Deutsche Bank National Trust Company,
not in its individual capacity, but solely in its capacity as trustee for the
benefit of the Holders of the LIBOR Certificates under this Agreement, and any
successor thereto, and any corporation or national banking association resulting
from or surviving any consolidation or merger to which it or its successors may
be a party and any successor trustee as may from time to time be serving as
successor trustee under this Agreement.

         Suspension Notification: Notification to the Commission of the
suspension of the Trust Fund's obligation to file reports pursuant to Section
15(d) of the Exchange Act.

         Swap Account: The separate Eligible Account created and initially
maintained by the Supplemental Interest Trustee pursuant to Section 3.06(g).

         Swap Amount: For any Distribution Date prior to the termination of the
Swap Contract, the amount, if any, distributed to the Swap Account in accordance
with Section 4.02(c), from amounts otherwise distributable to the Class A-1
Certificates in the absence of the Swap Contract.

         Swap Confirmation: The agreement between the Supplemental Interest
Trustee on behalf of IndyMac INDA Mortgage Loan Trust 2007-AR8 and the Swap
Counterparty evidencing the terms of the Swap Contract.

         Swap Contract: With respect to the LIBOR Certificates, the transaction
evidenced by the related Swap Confirmation, a form of which is attached hereto
as Exhibit P.

         Swap Contract Termination Date: The earliest of (i) the Distribution
Date in January 2038, (ii) the Distribution Date upon which the Class
Certificate Balance of the Class A-1 Certificates has been reduced to zero and
(iii) the date of an early termination of the Swap Contract.

         Swap Counterparty: Deutsche Bank AG, New York Branch.

         Swap Counterparty Trigger Event: A Swap Termination Payment that is
triggered upon (i) an "Event of Default" under the Swap Contract with respect to
which the Swap Counterparty is the sole

                                       40
<PAGE>

"Defaulting Party" (as defined in the Swap Contract) or (ii) a "Termination
Event" (other than an Illegality or a Tax Event, as such terms are defined in
the Swap Contract) or "Additional Termination Event" under the Swap Contract
with respect to which the Swap Counterparty is the sole "Affected Party" (as
defined in the Swap Contract).

         Swap Report: The report to be delivered by the Determination Date prior
to each Distribution Date by the Swap Counterparty to the Supplemental Interest
Trustee containing the amount of any Net Swap Payment payable by the
Supplemental Interest Trust or the Swap Counterparty to the other party, as the
case may be, with respect to the Swap Contract for that Distribution Date.

         Swap Termination Payment : The payment payable to either party under
the Swap Contract due to an early termination of the Swap Contract.

         Targeted Balance: Not applicable.

         Targeted Principal Classes: As specified in the Preliminary Statement.

         Transaction Documents: This Agreement and any other document or
agreement entered into in connection with the Trust Fund, the Certificates or
the Mortgage Loans.

         Transfer: Any direct or indirect transfer or sale of any Ownership
Interest in a Residual Certificate.

         Transfer Payment Made: As defined in Section 4.03.

         Transfer Payment Received: As defined in Section 4.03.

         Trust Fund: The corpus of the trust created under this Agreement
consisting of

         (i) the Mortgage Loans and all interest and principal received on them
after the Cut-off Date, other than amounts due on the Mortgage Loans by the
Cut-off Date;

         (ii) the Certificate Account, the Distribution Account and all amounts
deposited therein pursuant to this Agreement (including amounts received from
the Depositor on the Closing Date that will be deposited by the Servicer in the
Certificate Account pursuant to Section 2.01);

         (iii) property that secured a Mortgage Loan and has been acquired by
foreclosure, deed-in-lieu of foreclosure, or otherwise;

         (iv) the right to collect any amounts under any mortgage insurance
policies covering any Mortgage Loan and any collections received under any
mortgage insurance policies covering any Mortgage Loan; and

         (v) all proceeds of the conversion, voluntary or involuntary, of any of
the foregoing.

         Trustee: Deutsche Bank National Trust Company and its successors and,
if a successor trustee is appointed under this Agreement, the successor.

         Trustee Fee: The fee payable to the Trustee on each Distribution Date
for its services as Trustee hereunder, in an amount equal to one-twelfth of the
Trustee Fee Rate multiplied by the aggregate Stated Principal Balance of the
Mortgage Loans as of the Due Date in the month preceding the month of such

                                       41
<PAGE>

Distribution Date (after giving effect to Principal Prepayments in the
Prepayment Period related to that prior Due Date).

         Trustee Fee Rate: 0.0045% per annum.

         The terms "United States," "State," and "International Organization"
have the meanings in section 7701 of the Code or successor provisions. A
corporation will not be treated as an instrumentality of the United States or of
any State or political subdivision thereof for these purposes if all of its
activities are subject to tax and, with the exception of the Federal Home Loan
Mortgage Corporation, a majority of its board of directors is not selected by
such government unit.

         UCC: The Uniform Commercial Code for the State of New York.

         Undercollateralized Group: As defined in Section 4.03.

         Underwriter's Exemption: Prohibited Transaction Exemption 2002-41, 67
Fed. Reg. 54487 (2002) (or any successor thereto), or any substantially similar
administrative exemption granted by the U.S. Department of Labor

         United States Person or U.S. Person:

         (i) A citizen or resident of the United States;

         (ii) a corporation (or entity treated as a corporation for tax
purposes) created or organized in the United States or under the laws of the
United States or of any state thereof, including, for this purpose, the District
of Columbia;

         (iii) a partnership (or entity treated as a partnership for tax
purposes) organized in the United States or under the laws of the United States
or of any state thereof, including, for this purpose, the District of Columbia
(unless provided otherwise by future Treasury regulations);

         (iv) an estate whose income is includible in gross income for United
States income tax purposes regardless of its source; or

         (v) a trust, if a court within the United States is able to exercise
primary supervision over the administration of the trust and one or more U.S.
Persons have authority to control all substantial decisions of the trust.
Notwithstanding the last clause of the preceding sentence, to the extent
provided in Treasury regulations, certain trusts in existence on August 20,
1996, and treated as U.S. Persons before that date, may elect to continue to be
U.S. Persons.

         U.S.A. Patriot Act: The Uniting and Strengthening America by Providing
Appropriate Tools Required to Intercept and Obstruct Terrorism Act of 2001.

         Voting Rights: The portion of the voting rights of all of the
Certificates that is allocated to any Certificate. As of any date of
determination, (a) 1% of all Voting Rights shall be allocated to the Class A-R
Certificates and (b) the remaining Voting Rights shall be allocated among the
remaining Classes of Senior and Subordinated Certificates in proportion to the
Certificate Balances of the respective Certificates on the date.

         Weighted Average Adjusted Net Mortgage Rate: For any Distribution Date
and Loan Group, the average of the Adjusted Net Mortgage Rate of each Mortgage
Loan in that Loan Group, weighted on the

                                       42
<PAGE>

basis of its Stated Principal Balance as of the Due Date in the prior month
(after giving effect to Principal Prepayments in the Prepayment Period related
to such prior Due Date).

         Weighted Average Initial Adjustment Date: Not applicable.

         Section 1.02 Rules of Construction.

         Except as otherwise expressly provided in this Agreement or unless the
context clearly requires otherwise

         (a) References to designated articles, sections, subsections, exhibits,
and other subdivisions of this Agreement, such as "Section 6.12 (a)," refer to
the designated article, section, subsection, exhibit, or other subdivision of
this Agreement as a whole and to all subdivisions of the designated article,
section, subsection, exhibit, or other subdivision. The words "herein,"
"hereof," "hereto," "hereunder," and other words of similar import refer to this
Agreement as a whole and not to any particular article, section, exhibit, or
other subdivision of this Agreement.

         (b) Any term that relates to a document or a statute, rule, or
regulation includes any amendments, modifications, supplements, or any other
changes that may have occurred since the document, statute, rule, or regulation
came into being, including changes that occur after the date of this Agreement.

         (c) Any party may execute any of the requirements under this Agreement
either directly or through others, and the right to cause something to be done
rather than doing it directly shall be implicit in every requirement under this
Agreement. Unless a provision is restricted as to time or limited as to
frequency, all provisions under this Agreement are implicitly available and
things may happen from time to time.

         (d) The term "including" and all its variations mean "including but not
limited to." Except when used in conjunction with the word "either," the word
"or" is always used inclusively (for example, the phrase "A or B" means "A or B
or both," not "either A or B but not both").

         (e) A reference to "a [thing]" or "any [of a thing]" does not imply the
existence or occurrence of the thing referred to even though not followed by "if
any," and "any [of a thing]" is any of it. A reference to the plural of anything
as to which there could be either one or more than one does not imply the
existence of more than one (for instance, the phrase "the obligors on a note"
means "the obligor or obligors on a note"). "Until [something occurs]" does not
imply that it must occur, and will not be modified by the word "unless." The
word "due" and the word "payable" are each used in the sense that the stated
time for payment has passed. The word "accrued" is used in its accounting sense,
i.e., an amount paid is no longer accrued. In the calculation of amounts of
things, differences and sums may generally result in negative numbers, but when
the calculation of the excess of one thing over another results in zero or a
negative number, the calculation is disregarded and an "excess" does not exist.
Portions of things may be expressed as fractions or percentages interchangeably.

         (f) All accounting terms used in an accounting context and not
otherwise defined, and accounting terms partly defined in this Agreement, to the
extent not completely defined, shall be construed in accordance with generally
accepted accounting principles. To the extent that the definitions of accounting
terms in this Agreement are inconsistent with their meanings under generally
accepted accounting principles, the definitions contained in this Agreement
shall control. Capitalized terms used in this Agreement without definition that
are defined in the Uniform Commercial Code are used in this Agreement as defined
in the Uniform Commercial Code.

                                       43
<PAGE>

         (g) In the computation of a period of time from a specified date to a
later specified date or an open-ended period, the words "from" and "beginning"
mean "from and including," the word "after" means "from but excluding," the
words "to" and "until" mean "to but excluding," and the word "through" means "to
and including." Likewise, in setting deadlines or other periods, "by" means
"by." The words "preceding," "following," and words of similar import, mean
immediately preceding or following. References to a month or a year refer to
calendar months and calendar years.

         (h) Any reference to the enforceability of any agreement against a
party means that it is enforceable, subject as to enforcement against the party,
to applicable bankruptcy, insolvency, reorganization, and other similar laws of
general applicability relating to or affecting creditors' rights and to general
equity principles.

                                       44
<PAGE>

                                   ARTICLE TWO

          CONVEYANCE OF MORTGAGE LOANS; REPRESENTATIONS AND WARRANTIES

         Section 2.01      Conveyance of Mortgage Loans.

         (a) The Seller, concurrently with the execution and delivery of this
Agreement, hereby transfers to the Depositor, without recourse, all the interest
of the Seller in each Mortgage Loan, including all interest and principal
received or receivable by the Seller on each Mortgage Loan after the Cut-off
Date and all interest and principal payments on each Mortgage Loan received
before the Cut-off Date for installments of interest and principal due after the
Cut-off Date but not including payments of principal and interest due by the
Cut-off Date. By the Closing Date, the Seller shall deliver to the Depositor or,
at the Depositor's direction, to the Trustee or other designee of the Depositor,
the Mortgage File for each Mortgage Loan listed in the Mortgage Loan Schedule
(except that, in the case of Mortgage Loans that are Delay Delivery Mortgage
Loans, such delivery may take place within five Business Days of the Closing
Date) as of the Closing Date. The delivery of the Mortgage Files shall be made
against payment by the Depositor of the purchase price, previously agreed to by
the Seller and Depositor, for the Mortgage Loans. With respect to any Mortgage
Loan that does not have a first payment date on or before the Due Date in the
month of the first Distribution Date, the Seller shall deposit into the
Distribution Account on the first Distribution Account Deposit Date an amount
equal to one month's interest at the related Adjusted Mortgage Rate on the
Cut-off Date Principal Balance of such Mortgage Loan. On the Closing Date
the Depositor shall deposit $200 into the Certificate Account for the benefit of
the Class P-1 and Class P-2 Certificates.

         (b) The Depositor, concurrently with the execution and delivery of this
Agreement, hereby transfers to the Trustee for the benefit of the
Certificateholders, without recourse, all the interest of the Depositor in the
Trust Fund, together with the Depositor's right to require the Seller to cure
any breach of a representation or warranty made in this Agreement by the Seller
or to repurchase or substitute for any affected Mortgage Loan in accordance with
this Agreement. The Depositor hereby directs the Supplemental Interest Trustee
to execute the Swap Contract.

         (c) In connection with the transfer and assignment of each Mortgage
Loan, the Depositor has delivered (or, in the case of the Delay Delivery
Mortgage Loans, will deliver to the Trustee within the time periods specified in
the definition of Delay Delivery Mortgage Loans), for the benefit of the
Certificateholders the following documents or instruments with respect to each
Mortgage Loan so assigned:

                  (i) The original Mortgage Note, endorsed by manual or
         facsimile signature in blank in the following form: "Pay to the order
         of _______________ ______________without recourse," with all
         intervening endorsements showing a complete chain of endorsement from
         the originator to the Person endorsing the Mortgage Note (each
         endorsement being sufficient to transfer all interest of the party so
         endorsing, as noteholder or assignee thereof, in that Mortgage Note) or
         a lost note affidavit for any Lost Mortgage Note from the Seller
         stating that the original Mortgage Note was lost or destroyed, together
         with a copy of the Mortgage Note.

                  (ii) Except as provided below and for each Mortgage Loan that
         is not a MERS Mortgage Loan, the original recorded Mortgage or a copy
         of such Mortgage certified by the Seller as being a true and complete
         copy of the Mortgage (or, in the case of a Mortgage for which the
         related Mortgaged Property is located in the Commonwealth of Puerto
         Rico, a true copy of the Mortgage certified as such by the applicable
         notary) and in the case of each MERS Mortgage Loan, the original
         Mortgage, noting the presence of the MIN of the Mortgage Loans and
         either

                                       45
<PAGE>

         language indicating that the Mortgage Loan is a MOM Loan if the
         Mortgage Loan is a MOM Loan or if the Mortgage Loan was not a MOM Loan
         at origination, the original Mortgage and the assignment thereof to
         MERS, with evidence of recording indicated thereon, or a copy of the
         Mortgage certified by the public recording office in which such
         Mortgage has been recorded.

                  (iii) In the case of a Mortgage Loan that is not a MERS
         Mortgage Loan, a duly executed assignment of the Mortgage (which may be
         included in a blanket assignment or assignments), together with, except
         as provided below, all interim recorded assignments of the mortgage
         (each assignment, when duly and validly completed, to be in recordable
         form and sufficient to effect the assignment of and transfer to its
         assignee of the Mortgage to which the assignment relates). If the
         related Mortgage has not been returned from the applicable public
         recording office, the assignment of the Mortgage may exclude the
         information to be provided by the recording office. The assignment of
         Mortgage need not be delivered in the case of a Mortgage for which the
         related Mortgage Property is located in the Commonwealth of Puerto
         Rico.

                  (iv) The original or copies of any assumption, modification,
         written assurance, or substitution agreement.

                  (v) Except as provided below, the original or duplicate
         original lender's title policy and all its riders.

                  (vi) The originals of the following documents for each
         Cooperative Loan:

                           (A) the Co-op Shares, together with a stock power in
blank;

                           (B)      the executed Security Agreement;

                           (C)      the executed Proprietary Lease;

                           (D)      the executed Recognition Agreement;

                           (E)      the executed UCC-1 financing statement that
                                    has been filed in all places required to
                                    perfect the Seller's interest in the Co-op
                                    Shares and the Proprietary Lease with
                                    evidence of recording on it; and

                           (F)      executed UCC-3 financing statements or other
                                    appropriate UCC financing statements
                                    required by state law, evidencing a complete
                                    and unbroken line from the mortgagee to the
                                    Trustee with evidence of recording thereon
                                    (or in a form suitable for recordation).

         In addition, in connection with the assignment of any MERS Mortgage
Loan, the Seller agrees that it will cause, at the Seller's expense, the MERS(R)
System to indicate that the Mortgage Loans sold by the Seller to the Depositor
have been assigned by the Seller to the Trustee in accordance with this
Agreement for the benefit of the Certificateholders by including (or deleting,
in the case of Mortgage Loans that are repurchased in accordance with this
Agreement) in such computer files the information required by the MERS(R) System
to identify the series of the Certificates issued in connection with such
Mortgage Loans. The Seller further agrees that it will not, and will not permit
the Servicer to, and the Servicer agrees that it will not, alter the information
referenced in this paragraph with respect to any Mortgage Loan sold by the
Seller to the Depositor during the term of this Agreement unless and until such
Mortgage Loan is repurchased in accordance with the terms of this Agreement.

                                       46
<PAGE>

         In the event that in connection with any Mortgage Loan that is not a
MERS Mortgage Loan the Depositor cannot deliver (a) the original recorded
Mortgage, (b) all interim recorded assignments or (c) the lender's title policy
(together with all riders thereto) satisfying the requirements of clause (ii),
(iii) or (v) above, respectively, concurrently with the execution and delivery
of this Agreement because such document or documents have not been returned from
the applicable public recording office in the case of clause (ii) or (iii)
above, or because the title policy has not been delivered to either the Servicer
or the Depositor by the applicable title insurer in the case of clause (v)
above, then the Depositor shall promptly deliver to the Trustee, in the case of
clause (ii) or (iii) above, the original Mortgage or the interim assignment, as
the case may be, with evidence of recording indicated on when it is received
from the public recording office, or a copy of it, certified, if appropriate, by
the relevant recording office and in the case of clause (v) above, the original
or a copy of a written commitment or interim binder or preliminary report of
title issued by the title insurance or escrow company, with the original or
duplicate copy thereof to be delivered to the Trustee upon receipt thereof. The
delivery of the original Mortgage Loan and each interim assignment or a copy of
them, certified, if appropriate, by the relevant recording office, shall not be
made later than one year following the Closing Date, or, in the case of clause
(v) above, later than 120 days following the Closing Date. If the Depositor is
unable to deliver each Mortgage by that date and each interim assignment because
any documents have not been returned by the appropriate recording office, or, in
the case of each interim assignment, because the related Mortgage has not been
returned by the appropriate recording office, the Depositor shall deliver the
documents to the Trustee as promptly as possible upon their receipt and, in any
event, within 720 days following the Closing Date.

         The Depositor shall forward to the Trustee (a) from time to time
additional original documents evidencing an assumption or modification of a
Mortgage Loan and (b) any other documents required to be delivered by the
Depositor or the Servicer to the Trustee. If the original Mortgage is not
delivered and in connection with the payment in full of the related Mortgage
Loan the public recording office requires the presentation of a "lost
instruments affidavit and indemnity" or any equivalent document, because only a
copy of the Mortgage can be delivered with the instrument of satisfaction or
reconveyance, the Servicer shall execute and deliver the required document to
the public recording office. If a public recording office retains the original
recorded Mortgage or if a Mortgage is lost after recordation in a public
recording office, the Seller shall deliver to the Trustee a copy of the Mortgage
certified by the public recording office to be a true and complete copy of the
original recorded Mortgage.

         As promptly as practicable after any transfer of a Mortgage Loan under
this Agreement, and in any event within thirty days after the transfer, the
Trustee shall (i) affix the Trustee's name to each assignment of Mortgage, as
its assignee, and (ii) cause to be delivered for recording in the appropriate
public office for real property records the assignments of the Mortgages to the
Trustee, except that, if the Trustee has not received the information required
to deliver any assignment of a Mortgage for recording, the Trustee shall deliver
it as soon as practicable after receipt of the needed information and in any
event within thirty days.

         If any Mortgage Loans have been prepaid in full as of the Closing Date,
the Depositor, in lieu of delivering the above documents to the Trustee, will
deposit in the Certificate Account the portion of the prepayment that is
required to be deposited in the Certificate Account pursuant to Section 3.06.

         Notwithstanding anything to the contrary in this Agreement, within five
Business Days after the Closing Date, the Seller shall either

                  (x) deliver to the Trustee the Mortgage File as required
                  pursuant to this Section 2.01 for each Delay Delivery Mortgage
                  Loan or

                                       47
<PAGE>

                  (y) (A) repurchase the Delay Delivery Mortgage Loan or (B)
                  substitute the Substitute Mortgage Loan for a Delay Delivery
                  Mortgage Loan, which repurchase or substitution shall be
                  accomplished in the manner and subject to the conditions in
                  Section 2.03 (treating each such Delay Delivery Mortgage Loan
                  as a Deleted Mortgage Loan for purposes of such Section 2.03);

provided, however, that if the Seller fails to deliver a Mortgage File for any
Delay Delivery Mortgage Loan within the period specified herein, the Seller
shall use its best reasonable efforts to effect a substitution, rather than a
repurchase of, such Deleted Mortgage Loan and provided further that the cure
period provided for in Section 2.02 or in Section 2.03 shall not apply to the
initial delivery of the Mortgage File for such Delay Delivery Mortgage Loan, but
rather the Seller shall have five (5) Business Days to cure such failure to
deliver. At the end of such period, the Trustee shall send a Delay Delivery
Certification for the Delay Delivery Mortgage Loans delivered during such period
in accordance with the provisions of Section 2.02.

         (d) Notwithstanding the foregoing, however, the assignments of Mortgage
shall not be required to be submitted for recording (except with respect to any
Mortgage Loan secured by Mortgaged Property located in Maryland) unless such
failure to record would, as certified to the Trustee in writing by the Servicer,
result in a withdrawal or a downgrading by any Rating Agency of the rating on
any Class of Certificates; provided, however, that each assignment of Mortgage
shall be submitted for recording by the Seller (at the direction of the
Servicer) in the manner described above, at no expense to the Trust Fund or the
Trustee, upon the earliest to occur of: (i) reasonable direction by the Holders
of Certificates entitled to at least 25% of the Voting Rights, (ii) the
occurrence of a bankruptcy, insolvency or foreclosure relating to the Seller,
(iii) the occurrence of a servicing transfer as described in Section 7.02 and
(iv) if the Seller is not the Servicer and with respect to any one assignment or
Mortgage, the occurrence of a bankruptcy, insolvency or foreclosure relating to
the Mortgagor under the related Mortgage. Notwithstanding the foregoing, if the
Seller is unable to pay the cost of recording the assignments of Mortgage, such
expense shall be paid by the Trustee and shall be reimbursable out of the
Distribution Account.

         (e) The Seller agrees to treat the transfer of the Mortgage Loans to
the Depositor as a sale for all tax, accounting, and regulatory purposes.

         (f) The Trust Fund does not intend to acquire or hold any Mortgage Loan
that would violate the representations made by the Seller set forth in clause
(27) of Schedule III.

         Section 2.02      Acceptance by the Trustee of the Mortgage Loans.

         The Trustee acknowledges receipt of the documents identified in the
Initial Certification in the form of Exhibit G-1, and declares that it holds and
will hold such documents and the other documents delivered to it constituting
the Mortgage Files for the Mortgage Loans, and that it holds or will hold such
other assets as are included in the Trust Fund, in trust for the exclusive use
and benefit of all present and future Certificateholders.

         The Trustee acknowledges that it will maintain possession of the
related Mortgage Notes in the State of California, unless otherwise permitted by
the Rating Agencies. The Trustee agrees to execute and deliver on the Closing
Date to the Depositor, the Servicer and the Seller an Initial Certification in
the form of Exhibit G-1. Based on its review and examination, and only as to the
documents identified in such Initial Certification, the Trustee acknowledges
that such documents appear regular on their face and relate to such Mortgage
Loans. The Trustee shall be under no duty or obligation to inspect, review or
examine said documents, instruments, certificates or other papers to determine
that the same are genuine,

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<PAGE>

enforceable or appropriate for the represented purpose or that they have
actually been recorded in the real estate records or that they are other than
what they purport to be on their face.

         By the thirtieth day after the Closing Date (or if that day is not a
Business Day, the succeeding Business Day), the Trustee shall deliver to the
Depositor, the Servicer, and the Seller a Delay Delivery Certification with
respect to the Mortgage Loans substantially in the form of Exhibit G-2, with any
applicable exceptions noted thereon.

         By the ninetieth day after the Closing Date (or if that day is not a
Business Day, the succeeding Business Day), the Trustee shall deliver to the
Depositor, the Servicer and the Seller a Final Certification with respect to the
Mortgage Loans in the form of Exhibit H, with any applicable exceptions noted
thereon.

         If, in the course of its review, the Trustee finds any document
constituting a part of a Mortgage File that does not meet the requirements of
Section 2.01, the Trustee shall list such as an exception in the Final
Certification. The Trustee shall not make any determination as to whether (i)
any endorsement is sufficient to transfer all interest of the party so
endorsing, as noteholder or assignee thereof, in that Mortgage Note or (ii) any
assignment is in recordable form or is sufficient to effect the assignment of
and transfer to the assignee thereof under the mortgage to which the assignment
relates. The Seller shall promptly correct any defect that materially and
adversely affects the interests of the Certificateholders within 90 days from
the date it was so notified of the defect and, if the Seller does not correct
the defect within that period, the Seller shall either (a) substitute for the
related Mortgage Loan a Substitute Mortgage Loan, which substitution shall be
accomplished in the pursuant Section 2.03, or (b) purchase the Mortgage Loan at
its Purchase Price from the Trustee within 90 days from the date the Seller was
notified of the defect in writing.

         Any substitution pursuant to clause (a) above or purchase pursuant to
clause (b) above shall not be effected before the delivery to the Trustee of the
Opinion of Counsel, if required by Section 2.05, and any substitution pursuant
to clause (a) above shall not be effected before the additional delivery to the
Trustee of a Request for Release substantially in the form of Exhibit N. No
substitution is permitted to be made in any calendar month after the
Determination Date for the month.

         If a substitution or purchase of a Mortgage Loan pursuant to this
provision is required because of a delay in delivery of any documents by the
appropriate recording office, or there is a dispute between either the Servicer
or the Seller and the Trustee over the location or status of the recorded
document, then the substitution or purchase shall occur within 720 days from the
Closing Date. In no other case may a substitution or purchase occur more than
540 days from the Closing Date.

         The Purchase Price for any Mortgage Loan shall be deposited by the
Seller in the Certificate Account by the Distribution Account Deposit Date for
the Distribution Date in the month following the month of repurchase and, upon
receipt of the deposit and certification with respect thereto in the form of
Exhibit N, the Trustee shall release the related Mortgage File to the Seller and
shall execute and deliver at the Seller's request any instruments of transfer or
assignment prepared by the Seller, in each case without recourse, necessary to
vest in the Seller, or a designee, the Trustee's interest in any Mortgage Loan
released pursuant hereto.

         If pursuant to the foregoing provisions the Seller repurchases a
Mortgage Loan that is a MERS Mortgage Loan, the Servicer shall either (i) cause
MERS to execute and deliver an assignment of the Mortgage in recordable form to
transfer the Mortgage from MERS to the Seller and shall cause such Mortgage to
be removed from registration on the MERS(R) System in accordance with MERS'
rules and

                                       49
<PAGE>

regulations or (ii) cause MERS to designate on the MERS(R) System the Seller as
the beneficial holder of such Mortgage Loan.

         The Trustee shall retain possession and custody of each Mortgage File
in accordance with and subject to the terms and conditions set forth herein. The
Servicer shall promptly deliver to the Trustee, upon the execution or receipt
thereof, the originals of any other documents or instruments constituting the
Mortgage File that come into the possession of the Servicer from time to time.

         The obligation of the Seller to substitute for or to purchase any
Mortgage Loan that does not meet the requirements of Section 2.01 shall
constitute the sole remedy respecting the defect available to the Trustee, the
Depositor, and any Certificateholder against the Seller.

         Section 2.03 Representations, Warranties, and Covenants of the Seller
and the Servicer.

         (a) IndyMac, in its capacities as Seller and Servicer, makes the
representations and warranties in Schedule II, and by this reference
incorporated in this Agreement, to the Depositor and the Trustee, as of the
Closing Date.

         (b) The Seller, in its capacity as Seller, makes the representations
and warranties in Schedule III, and by this reference incorporated in this
Agreement, to the Depositor and the Trustee, as of the Closing Date, or if so
specified in Schedule III, as of the Cut-off Date.

         (c) Upon discovery by any of the parties hereto of a breach of a
representation or warranty made pursuant to Section 2.03(b) that materially and
adversely affects the interests of the Certificateholders in any Mortgage Loan,
the party discovering such breach shall give prompt notice thereof to the other
parties. Any breach of representations and warranties under clauses (27) and
(32) of Schedule III shall be deemed to materially and adversely affect the
interests of the Certificateholders in the affected Mortgage Loans. The Seller
covenants that within 90 days of the earlier of its discovery or its receipt of
written notice from any party of a breach of any representation or warranty made
pursuant to Section 2.03(b) which materially and adversely affects the interests
of the Certificateholders in any Mortgage Loan, it shall cure such breach in all
material respects, and if such breach is not so cured, shall, (i) if the 90-day
period expires before the second anniversary of the Closing Date, remove the
Mortgage Loan (a "Deleted Mortgage Loan") from the Trust Fund and substitute in
its place a Substitute Mortgage Loan, in accordance with this Section 2.03; or
(ii) repurchase the affected Mortgage Loan or Mortgage Loans from the Trustee at
the Purchase Price in the manner set forth below. Any substitution pursuant to
(i) above shall not be effected before the delivery to the Trustee of the
Opinion of Counsel, if required by Section 2.05, and a Request for Release
substantially in the form of Exhibit N, and the Mortgage File for any Substitute
Mortgage Loan. The Seller shall promptly reimburse the Servicer and the Trustee
for any expenses reasonably incurred by the Servicer or the Trustee in respect
of enforcing the remedies for the breach.

         With respect to any Substitute Mortgage Loan or Loans, the Seller shall
deliver to the Trustee for the benefit of the Certificateholders the Mortgage
Note, the Mortgage, the related assignment of the Mortgage, and such other
documents and agreements as are required by Section 2.01, with the Mortgage Note
endorsed and the Mortgage assigned as required by Section 2.01. No substitution
is permitted to be made in any calendar month after the Determination Date for
such month. Scheduled Payments due with respect to Substitute Mortgage Loans in
the month of substitution shall not be part of the Trust Fund and will be
retained by the Seller on the next succeeding Distribution Date. For the month
of substitution, distributions to Certificateholders will include the monthly
payment due on any Deleted Mortgage Loan for such month and thereafter the
Seller shall be entitled to retain all amounts received in respect of such
Deleted Mortgage Loan.

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<PAGE>

         The Servicer shall amend the Mortgage Loan Schedule for the benefit of
the Certificateholders to reflect the removal of the Deleted Mortgage Loan and
the substitution of the Substitute Mortgage Loans and the Servicer shall deliver
the amended Mortgage Loan Schedule to the Trustee. Upon the substitution, the
Substitute Mortgage Loans shall be subject to this Agreement in all respects,
and the Seller shall be deemed to have made with respect to the Substitute
Mortgage Loans, as of the date of substitution, the representations and
warranties made pursuant to Section 2.03(b) with respect to the Mortgage Loan.
Upon any substitution and the deposit to the Certificate Account of the amount
required to be deposited therein in connection with the substitution as
described in the following paragraph, the Trustee shall release the Mortgage
File held for the benefit of the Certificateholders relating to the Deleted
Mortgage Loan to the Seller and shall execute and deliver at the Seller's
direction such instruments of transfer or assignment prepared by the Seller, in
each case without recourse, as shall be necessary to vest title in the Seller,
or its designee, the Trustee's interest in any Deleted Mortgage Loan substituted
for pursuant to this Section 2.03.

         For any month in which the Seller substitutes one or more Substitute
Mortgage Loans for one or more Deleted Mortgage Loans, the Servicer will
determine the amount (if any) by which the aggregate principal balance of all
such Substitute Mortgage Loans as of the date of substitution is less than the
aggregate Stated Principal Balance of all such Deleted Mortgage Loans (after
application of the scheduled principal portion of the monthly payments due in
the month of substitution). The amount of such shortage (the "Substitution
Adjustment Amount") plus, if the Seller is not the Servicer, an amount equal to
the aggregate of any unreimbursed Advances and Servicer Advances with respect to
such Deleted Mortgage Loans shall be deposited into the Certificate Account by
the Seller by the Distribution Account Deposit Date for the Distribution Date in
the month succeeding the calendar month during which the related Mortgage Loan
became required to be purchased or replaced hereunder. If the Seller repurchases
a Mortgage Loan, the Purchase Price therefor shall be deposited in the
Certificate Account pursuant to Section 3.06 by the Distribution Account Deposit
Date for the Distribution Date in the month following the month during which the
Seller became obligated hereunder to repurchase or replace the Mortgage Loan and
upon such deposit of the Purchase Price and receipt of a Request for Release in
the form of Exhibit N, the Trustee shall release the related Mortgage File held
for the benefit of the Certificateholders to such Person, and the Trustee shall
execute and deliver at such Person's direction such instruments of transfer or
assignment prepared by such Person, in each case without recourse, as shall be
necessary to transfer title from the Trustee. The obligation under this
Agreement of any Person to cure, repurchase, or replace any Mortgage Loan as to
which a breach has occurred and is continuing shall constitute the sole remedy
against the Person respecting the breach available to Certificateholders, the
Depositor, or the Trustee on their behalf.

         The representations and warranties made pursuant to this Section 2.03
shall survive delivery of the respective Mortgage Files to the Trustee for the
benefit of the Certificateholders and shall not be waived by the Depositor.

         The Seller assigns to the Depositor and the Depositor assigns to the
Trustee all rights the Seller might have under contracts with third parties
relating to early payment defaults on the Mortgage Loans ("EPD Rights") and the
Servicer assumes any related duties as part of its servicing obligations.
Consistent with the Servicing Standard, the Servicer shall attempt to enforce
the EPD Rights. If the Servicer's enforcement of the EPD Rights obligates the
Servicer to sell a Mortgage Loan to a third party, the Servicer shall repurchase
the Mortgage Loan at the Purchase Price and sell the Mortgage Loan to the third
party, provided however, in no case shall the Servicer be obligated to
repurchase a Mortgage Loan on account of EPD Rights unless and until the
Servicer shall have previously received repurchase payment from a third party.
The Servicer shall deposit into the Certificate Account all amounts received in
connection with the enforcement of EPD Rights, not exceeding the Purchase Price,
with respect to any Mortgage Loan. Any amounts received by the Servicer with
respect a Mortgage Loan in excess of the

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<PAGE>

Purchase Price shall be retained by the Servicer as additional servicing
compensation. The Trustee, upon receipt of certification from the Servicer of
the deposit of the Purchase Price in connection with a repurchase of a Mortgage
Loan and a Request for File Release from the Servicer, shall release or cause to
be released to the purchaser of such Mortgage Loan the related Mortgage File and
shall execute and deliver such instruments of transfer or assignment prepared by
the purchaser of such Mortgage Loan, in each case without recourse, as shall be
necessary to vest in the purchaser of such Mortgage Loan any Mortgage Loan
released pursuant hereto and the purchaser of such Mortgage Loan shall succeed
to all the Trustee's right, title and interest in and to such Mortgage Loan and
all security and documents related thereto. Such assignment shall be an
assignment outright and not for security. The purchaser of such Mortgage Loan
shall thereupon own such Mortgage Loan, and all security and documents, free of
any further obligation to the Trustee or the Certificateholders with respect
thereto.

         Section 2.04 Representations and Warranties of the Depositor as to the
Mortgage Loans.

         The Depositor represents and warrants to the Trustee with respect to
each Mortgage Loan as of the date of this Agreement or such other date set forth
in this Agreement that as of the Closing Date, and following the transfer of the
Mortgage Loans to it by the Seller, the Depositor had good title to the Mortgage
Loans and the Mortgage Notes were subject to no offsets, defenses, or
counterclaims.

         The representations and warranties in this Section 2.04 shall survive
delivery of the Mortgage Files to the Trustee. Upon discovery by the Depositor
or the Trustee of any breach of any of the representations and warranties in
this Section that materially and adversely affects the interest of the
Certificateholders, the party discovering the breach shall give prompt written
notice to the others and to each Rating Agency.

         Section 2.05 Delivery of Opinion of Counsel in Connection with
Substitutions.

         (a) Notwithstanding any contrary provision of this Agreement, no
substitution pursuant to Section 2.02 or 2.03 shall be made more than 90 days
after the Closing Date unless the Seller delivers to the Trustee an Opinion of
Counsel, which Opinion of Counsel shall not be at the expense of either the
Trustee or the Trust Fund, addressed to the Trustee, to the effect that such
substitution will not (i) result in the imposition of the tax on "prohibited
transactions" on the Trust Fund or contributions after the Startup Date, as
defined in sections 860F(a)(2) and 860G(d) of the Code, respectively or (ii)
cause any REMIC created under this Agreement to fail to qualify as a REMIC at
any time that any Certificates are outstanding.

         (b) Upon discovery by the Depositor, the Seller, the Servicer or the
Trustee that any Mortgage Loan does not constitute a "qualified mortgage" within
the meaning of section 860G(a)(3) of the Code, the party discovering such fact
shall promptly (and in any event within five Business Days of discovery) give
written notice thereof to the other parties. In connection therewith, the
Trustee shall require the Seller, at the Seller's option, to either (i)
substitute, if the conditions in Section 2.03(c) with respect to substitutions
are satisfied, a Substitute Mortgage Loan for the affected Mortgage Loan, or
(ii) repurchase the affected Mortgage Loan within 90 days of such discovery in
the same manner as it would a Mortgage Loan for a breach of representation or
warranty made pursuant to Section 2.03. The Trustee shall reconvey to the Seller
the Mortgage Loan to be released pursuant hereto in the same manner, and on the
same terms and conditions, as it would a Mortgage Loan repurchased for breach of
a representation or warranty contained in Section 2.03.

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<PAGE>

         Section 2.06 Execution and Delivery of Certificates.

         The Trustee acknowledges the transfer and assignment to it of the Trust
Fund and, concurrently with such transfer and assignment, has executed and
delivered to or upon the order of the Depositor, the Certificates in authorized
denominations evidencing directly or indirectly the entire ownership of the
Trust Fund. The Trustee agrees to hold the Trust Fund and exercise the rights
referred to above for the benefit of all present and future Holders of the
Certificates.

         Section 2.07 REMIC Matters.

         The Preliminary Statement sets forth the designations and "latest
possible maturity date" for federal income tax purposes of all interests created
under this Agreement. The "Startup Day" for purposes of the REMIC Provisions
shall be the Closing Date. Each REMIC's fiscal year shall be the calendar year.

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<PAGE>

                                  ARTICLE THREE

                 ADMINISTRATION AND SERVICING OF MORTGAGE LOANS

         Section 3.01  Servicer to Service Mortgage Loans.

         For and on behalf of the Certificateholders, the Servicer shall service
and administer the Mortgage Loans in accordance with this Agreement and the
Servicing Standard.

         The Servicer shall not make or permit any modification, waiver, or
amendment of any term of any Mortgage Loan that would cause any REMIC created
under this Agreement to fail to qualify as a REMIC or result in the imposition
of any tax under section 860F(a) or section 860G(d) of the Code.

         Without limiting the generality of the foregoing, the Servicer, in its
own name or in the name of the Depositor and the Trustee, is hereby authorized
and empowered by the Depositor and the Trustee, when the Servicer believes it
appropriate in its reasonable judgment, to execute and deliver, on behalf of the
Trustee, the Depositor, the Certificateholders, or any of them, any instruments
of satisfaction or cancellation, or of partial or full release or discharge, and
all other comparable instruments, with respect to the Mortgage Loans, and with
respect to the Mortgaged Properties held for the benefit of the
Certificateholders. The Servicer shall prepare and deliver to the Depositor or
the Trustee any documents requiring execution and delivery by either or both of
them appropriate to enable the Servicer to service and administer the Mortgage
Loans to the extent that the Servicer is not permitted to execute and deliver
such documents pursuant to the preceding sentence. Upon receipt of the
documents, the Depositor or the Trustee shall execute the documents and deliver
them to the Servicer.

         The Servicer further is authorized and empowered by the Trustee, on
behalf of the Certificateholders and the Trustee, in its own name, when the
Servicer believes it appropriate in its best judgment to register any Mortgage
Loan on the MERS(R) System, or cause the removal from the registration of any
Mortgage Loan on the MERS(R) System, to execute and deliver, on behalf of the
Trustee and the Certificateholders or any of them, any and all instruments of
assignment and other comparable instruments with respect to such assignment or
re-recording of a Mortgage in the name of MERS, solely as nominee for the
Trustee and its successors and assigns.

         In accordance with and to the extent of the Servicing Standard, the
Servicer shall advance funds necessary to effect the payment of taxes and
assessments on the Mortgaged Properties, which advances shall be reimbursable in
the first instance from related collections from the Mortgagors pursuant to
Section 3.07, and further as provided in Section 3.09. The costs incurred by the
Servicer in effecting the timely payments of taxes and assessments on the
Mortgaged Properties and related insurance premiums shall not, for the purpose
of calculating monthly distributions to the Certificateholders, be added to the
Stated Principal Balances of the related Mortgage Loans, notwithstanding that
the Mortgage Loans so permit.

         Nothing in this Agreement to the contrary shall limit the Servicer from
undertaking any legal action that it may deem appropriate with respect to the
Mortgage Loans including, without limitation, any rights or causes of action
arising out of the origination of the Mortgage Loans.

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<PAGE>

         Section 3.02 [Reserved].

         Section 3.03 Rights of the Depositor and the Trustee in Respect of the
Servicer.

         The Depositor may, but is not obligated to, enforce the obligations of
the Servicer under this Agreement and may, but is not obligated to, perform, or
cause a designee to perform, any defaulted obligation of the Servicer under this
Agreement and in connection with any such defaulted obligation to exercise the
related rights of the Servicer under this Agreement; provided that the Servicer
shall not be relieved of any of its obligations under this Agreement by virtue
of such performance by the Depositor or its designee. Neither the Trustee nor
the Depositor shall have any responsibility or liability for any action or
failure to act by the Servicer nor shall the Trustee or the Depositor be
obligated to supervise the performance of the Servicer under this Agreement or
otherwise.

         Section 3.04 [Reserved].

         Section 3.05 Trustee to Act as Servicer.

         If the Servicer for any reason is no longer the Servicer under this
Agreement (including because of the occurrence or existence of an Event of
Default or termination by the Depositor), the Trustee or its successor shall
assume all of the rights and obligations of the Servicer under this Agreement
arising thereafter (except that the Trustee shall not be

                  (i) liable for losses of the Servicer pursuant to Section 3.10
         or any acts or omissions of the predecessor Servicer hereunder,

                  (ii) obligated to make Advances if it is prohibited from doing
         so by applicable law,

                  (iii) obligated to effectuate repurchases or substitutions of
         Mortgage Loans hereunder, including repurchases or substitutions
         pursuant to Section 2.02 or 2.03,

                  (iv) responsible for expenses of the Servicer pursuant to
         Section 2.03, or

                  (v) deemed to have made any representations and warranties of
         the Servicer hereunder). Any assumption shall be subject to Section
         7.02.

         Notwithstanding anything else in this Agreement to the contrary, in no
event shall the Trustee be liable for any servicing fee or for any differential
in the amount of the Servicing Fee paid under this Agreement and the amount
necessary to induce any successor Servicer to act as successor Servicer under
this Agreement and the transactions provided for in this Agreement.

         Section 3.06 Collection of Mortgage Loan Payments; Certificate Account;
Distribution Account; Swap Account; Collateral Account.

         (a) In accordance with and to the extent of the Servicing Standard, the
Servicer shall make reasonable efforts in accordance with the customary and
usual standards of practice of prudent mortgage servicers to collect all
payments called for under the Mortgage Loans to the extent the procedures are
consistent with this Agreement and any related Required Insurance Policy.
Consistent with the foregoing, the Servicer may in its discretion (i) subject to
Section 3.21, waive any Late Payment Fee or, subject to Section 3.20, waive any
Prepayment Charge in connection with the prepayment of a Mortgage Loan and (ii)
extend the due dates for payments due on a Delinquent Mortgage Loan for a period
not greater than 125 days. In connection with a Mortgage Loan that is in
default, or with respect to which default is

                                       55
<PAGE>

reasonably foreseeable, the Servicer may, consistent with the Servicing
Standard, waive, modify or vary any term of that Mortgage Loan (including
modifications that change the Mortgage Rate, forgive the payment of principal or
interest or extend the final maturity date of that Mortgage Loan ), accept
payment from the related Mortgagor of an amount less than the Stated Principal
Balance in final satisfaction of that Mortgage Loan, or consent to the
postponement of strict compliance with any such term or otherwise grant
indulgence to any Mortgagor if in the Servicer's determination such waiver,
modification, postponement or indulgence (such a waiver, modification,
postponement or indulgence, a "Preemptive Loan Modification")is not materially
adverse to the interests of the Certificateholders (taking into account any
estimated loss that might result absent such action) and is expected to minimize
the loss on such Mortgage Loan; provided, however, the Servicer shall not
initiate new lending to such Mortgagor through the Trust and cannot, except as
provided in the immediately succeeding sentence, extend the maturity of any
Mortgage Loan past the date on which the final payment is due on the latest
maturing Mortgage Loan as of the Cut-off Date. With respect to no more than 5%
of the Mortgage Loans (measured by aggregate Cut-off Date Principal Balance of
the Mortgage Loans), the Servicer may extend the maturity of a Mortgage Loan
past the date on which the final payment is due on the latest maturing Mortgage
Loan as of the Cut-off Date, but in no event more than one year past such date.
In the event of any such arrangement, the Servicer shall make Advances on the
related Mortgage Loan in accordance with Section 4.01 during the scheduled
period in accordance with the amortization schedule of the Mortgage Loan without
modification thereof because of the arrangements. The Servicer shall not be
required to institute or join in litigation with respect to collection of any
payment (whether under a Mortgage, Mortgage Note, or otherwise or against any
public or governmental authority with respect to a taking or condemnation) if it
reasonably believes that enforcing the provision of the Mortgage or other
instrument pursuant to which the payment is required is prohibited by applicable
law. The Servicer shall not have the discretion to sell any Delinquent or
defaulted Mortgage Loan.

         (b) [Reserved].

         (c) [Reserved].

         (d) The Servicer shall establish and maintain a Certificate Account
into which the Servicer shall deposit within two Business Days of receipt or as
otherwise specified in this Agreement, the following payments and collections
received by it in respect of Mortgage Loans after the Cut-off Date (other than
in respect of principal and interest due on the Mortgage Loans by the Cut-off
Date) and the following amounts required to be deposited hereunder:

                  (i) all payments on account of principal on the Mortgage
         Loans, including Principal Prepayments;

                  (ii) all payments on account of interest on the Mortgage
         Loans, net of the Prepayment Interest Excess and of the Servicing Fee;

                  (iii) all Insurance Proceeds, Subsequent Recoveries and
         Liquidation Proceeds, other than proceeds to be applied to the
         restoration or repair of the Mortgaged Property or released to the
         Mortgagor in accordance with the Servicer's normal servicing
         procedures;

                  (iv) any amount required to be deposited by the Servicer
         pursuant to Section 3.06(f) in connection with any losses on Permitted
         Investments;

                  (v) any amounts required to be deposited by the Servicer
         pursuant to Sections 3.10 and 3.12;

                                       56
<PAGE>

                  (vi) all Purchase Prices from the Servicer or Seller and all
         Substitution Adjustment Amounts;

                  (vii) all Advances made by the Servicer pursuant to Section
         4.01;

                  (viii) any other amounts required to be deposited under this
         Agreement;

                  (ix) all Late Payment Fees collected by the Servicer; and

                  (x) all Prepayment Charges collected and amounts payable by
         the Servicer for the waiver of such amounts.

         In addition, with respect to any Mortgage Loan that is subject to a
buydown agreement, on each Due Date for the Mortgage Loan, in addition to the
monthly payment remitted by the Mortgagor, the Servicer shall cause funds to be
deposited into the Certificate Account in an amount required to cause an amount
of interest to be paid with respect to the Mortgage Loan equal to the amount of
interest that has accrued on the Mortgage Loan from the preceding Due Date at
the Mortgage Rate net of the Servicing Fee Rate on that date.

         The foregoing requirements for remittance by the Servicer to the
Certificate Account shall be exclusive, it being understood and agreed that,
without limiting the generality of the foregoing, payments in the nature of
assumption fees, if collected, need not be remitted by the Servicer. If the
Servicer remits any amount not required to be remitted, it may at any time
withdraw that amount from the Certificate Account, any provision in this
Agreement to the contrary notwithstanding. The withdrawal or direction may be
accomplished by delivering written notice of it to the Trustee or any other
institution maintaining the Certificate Account that describes the amounts
deposited in error in the Certificate Account. The Servicer shall maintain
adequate records with respect to all withdrawals made pursuant to this Section
3.06. All funds deposited in the Certificate Account shall be held in trust for
the Certificateholders until withdrawn in accordance with Section 3.09.

         (e) The Trustee shall establish and maintain the Distribution Account
on behalf of the Certificateholders, which shall be a segregated, non-interest
bearing account. The Trustee shall, promptly upon receipt, deposit in the
Distribution Account and retain in the Distribution Account the following:

                  (i) the aggregate amount remitted by the Servicer to the
         Trustee pursuant to Section 3.09(a);

                  (ii) any amount deposited by the Servicer pursuant to Section
         3.06(f) in connection with any losses on Permitted Investments; and

                  (iii) any other amounts deposited under this Agreement that
         are required to be deposited in the Distribution Account.

         If the Servicer remits any amount not required to be remitted, it may
at any time direct the Trustee in writing to withdraw that amount from the
Distribution Account, any provision in this Agreement to the contrary
notwithstanding. The direction may be accomplished by delivering an Officer's
Certificate to the Trustee that describes the amounts deposited in error in the
Distribution Account. All funds deposited in the Distribution Account shall be
held by the Trustee in trust for the Certificateholders until disbursed in
accordance with this Agreement or withdrawn in accordance with Section 3.09. In
no event shall the Trustee incur liability for withdrawals from the Distribution
Account at the direction of the Servicer.

                                       57
<PAGE>

         (f) Each institution at which the Certificate Account is maintained
shall invest the funds in such account as directed in writing by the Servicer in
Permitted Investments, which shall mature not later than the second Business Day
preceding the related Distribution Account Deposit Date (except that if the
Permitted Investment is an obligation of the institution that maintains the
account, then the Permitted Investment shall mature not later than the Business
Day preceding the Distribution Account Deposit Date) and which shall not be sold
or disposed of before its maturity. The funds in the Distribution Account shall
remain uninvested. All such Permitted Investments shall be made in the name of
the Trustee, for the benefit of the Certificateholders. All income realized from
any such investment of funds on deposit in the Certificate Account shall be for
the benefit of the Servicer as servicing compensation and shall be remitted to
it monthly as provided in this Agreement. The amount of any realized losses on
Permitted Investments in the Certificate Account shall promptly be deposited by
the Servicer in the Certificate Account. The Trustee shall not be liable for the
amount of any loss incurred in respect of any investment or lack of investment
of funds held in the Certificate Account and made in accordance with this
Section 3.06.

         (g) (i) On the Closing Date, the Supplemental Interest Trustee shall
establish and maintain in its name, in trust for the benefit of the Holders of
the LIBOR Certificates, the Swap Account. The Swap Account shall be a
non-interest bearing Eligible Account, and funds on deposit in the account shall
be held separate and apart from, and shall not be commingled with, any other
moneys, including without limitation, other moneys held by the Trustee pursuant
to this Agreement.

                  (ii) The Supplemental Interest Trustee shall deposit in the
Swap Account all amounts received from the Swap Counterparty for any
Distribution Date. If the Supplemental Interest Trustee deposits into the Swap
Account any amount not required to be deposited in that account, it may at any
time withdraw such amount from the Swap Account, any provision in this Agreement
to the contrary notwithstanding. Funds in the Swap Account shall be held
uninvested.

                  (iii) Funds on deposit in the Swap Account shall be
distributed in the amounts and in the order described under Section 4.02(d).

                  (iv) On each Distribution Date, the Trustee shall make the
deposits to the Swap Account pursuant to Section 4.02(a) and (b).

         (h) (i) Upon the execution of an ISDA Credit Support Annex, the
Supplemental Interest Trustee shall establish and maintain in its name, in trust
for the benefit of the Holders of the LIBOR Certificates, the Collateral
Account. The Collateral Account shall be a non-interest bearing Eligible
Account, and funds on deposit in the account shall be held separate and apart
from, and shall not be commingled with, any other moneys, including without
limitation, other moneys held by the Supplemental Interest Trustee pursuant to
this Agreement.

                  (ii) The Supplemental Interest Trustee shall deposit in the
Collateral Account any collateral (whether in the form of cash, securities or
any other eligible investments) pledged by the Swap Counterparty under the ISDA
Credit Support Annex. If the Supplemental Interest Trustee deposits into the
Collateral Account any amount not required to be deposited in that account, it
may at any time withdraw such amount from the Collateral Account, any provision
in this Agreement to the contrary notwithstanding. Funds in the Collateral
Account shall be invested in permitted investments defined in the ISDA Credit
Support Annex. The Supplemental Interest Trustee shall not be liable for any
loss of investment of funds made pursuant to the ISDA Credit Support Annex.

                  (iii) Funds on deposit in the Collateral Account shall be
applied in accordance with the terms of the related ISDA Credit Support Annex.

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         (i) The Servicer shall give notice to the Trustee, the Seller, each
Rating Agency and the Depositor of any proposed change of the location of the
Certificate Account not later than 30 days and not more than 45 days prior to
any change of this Agreement. The Trustee shall give notice to the Servicer, the
Seller, each Rating Agency and the Depositor of any proposed change of the
location of the Distribution Account, Swap Account or Collateral Account not
later than 30 days and not more than 45 days prior to any change of this
Agreement.

         (j) Upon a downgrade in the rating of an institution at which an
Eligible Account is held below the required ratings set forth in the definition
of Eligible Account, within 30 days of such downgrade, such account will be
transferred to an account meeting the requirements of the definition of Eligible
Account; provided, however, that this transfer requirement may be waived by the
applicable Rating Agency.

         Section 3.07 Collection of Taxes, Assessments and Similar Items; Escrow
Accounts.

         (a) To the extent required by the related Mortgage Note and not
violative of current law, the Servicer shall establish and maintain one or more
accounts (each, an "Escrow Account") and deposit and retain therein all
collections from the Mortgagors (or advances) for the payment of taxes,
assessments, hazard insurance premiums or comparable items for the account of
the Mortgagors. Nothing herein shall require the Servicer to compel a Mortgagor
to establish an Escrow Account in violation of applicable law.

         (b) Withdrawals of amounts so collected from the Escrow Accounts may be
made only to effect timely payment of taxes, assessments, hazard insurance
premiums, condominium or PUD association dues, or comparable items, to reimburse
(without duplication) the Servicer out of related collections for any payments
made pursuant to Section 3.01 (with respect to taxes and assessments and
insurance premiums) and Section 3.10 (with respect to hazard insurance), to
refund to any Mortgagors any sums determined to be overages, to pay interest, if
required by law or the related Mortgage or Mortgage Note, to Mortgagors on
balances in the Escrow Account or to clear and terminate the Escrow Account at
the termination of this Agreement in accordance with Section 9.01. The Escrow
Accounts shall not be a part of the Trust Fund.

         (c) The Servicer shall advance any payments referred to in Section
3.07(a) that are not timely paid by the Mortgagors or advanced by the Servicer
on the date when the tax, premium or other cost for which such payment is
intended is due, but the Servicer shall be required so to advance only to the
extent that such advances, in the good faith judgment of the Servicer, will be
recoverable by the Servicer out of Insurance Proceeds, Liquidation Proceeds or
otherwise.

         Section 3.08 Access to Certain Documentation and Information Regarding
the Mortgage Loans.

         The Servicer shall afford the Depositor and the Trustee reasonable
access to all records and documentation regarding the Mortgage Loans and all
accounts, insurance information and other matters relating to this Agreement,
such access being afforded without charge, but only upon reasonable request and
during normal business hours at the office designated by the Servicer.

         Upon reasonable advance notice in writing, the Servicer will provide to
each Certificateholder or Certificate Owner that is a savings and loan
association, bank, or insurance company certain reports and reasonable access to
information and documentation regarding the Mortgage Loans sufficient to permit
the Certificateholder or Certificate Owner to comply with applicable regulations
of the OTS or other regulatory authorities with respect to investment in the
Certificates. The Servicer shall be entitled to be reimbursed by each such
Certificateholder or Certificate Owner for actual expenses incurred by the
Servicer in providing the reports and access.

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<PAGE>

         Section 3.09 Permitted Withdrawals from the Certificate Account, the
Distribution Account and the Swap Account.

         (a) The Servicer may (and, in the case of clause (ix) below, shall)
from time to time make withdrawals from the Certificate Account for the
following purposes:

                  (i) to pay to the Servicer (to the extent not previously
         retained) the servicing compensation to which it is entitled pursuant
         to Section 3.15, and to pay to the Servicer, as additional servicing
         compensation, earnings on or investment income with respect to funds in
         or credited to the Certificate Account;

                  (ii) to reimburse the Servicer or successor Servicer for the
         unreimbursed Advances made by it, such right of reimbursement pursuant
         to this subclause (ii) being limited to amounts received on the
         Mortgage Loans in respect of which the Advance was made;

                  (iii) to reimburse the Servicer or successor Servicer for any
         Nonrecoverable Advance previously made by it;

                  (iv) to reimburse the Servicer for Insured Expenses from the
         related Insurance Proceeds;

                  (v) to reimburse the Servicer for (a) unreimbursed Servicing
         Advances, the Servicer's right to reimbursement pursuant to this clause
         (a) with respect to any Mortgage Loan being limited to amounts received
         on the Mortgage Loans that represent late recoveries of the payments
         for which the advances were made pursuant to Section 3.01 or Section
         3.07, (b) unreimbursed Servicing Advances made in respect of a Mortgage
         Loan for which such Servicing Advances are not recoverable from the
         Mortgagor and (c) for unpaid Servicing Fees as provided in Section
         3.12;

                  (vi) to pay to the purchaser, with respect to each Mortgage
         Loan or property acquired in respect of such Mortgage Loan that has
         been purchased pursuant to Section 2.02, 2.03, or 3.12, all amounts
         received thereon after the date of such purchase;

                  (vii) to reimburse the Seller, the Servicer, or the Depositor
         for expenses incurred by any of them and reimbursable pursuant to
         Section 6.03;

                  (viii) to withdraw any amount deposited in the Certificate
         Account and not required to be deposited in the Certificate Account;

                  (ix) by the Distribution Account Deposit Date, to withdraw (1)
         the Available Funds and the Trustee Fee for the Distribution Date, to
         the extent on deposit, and (2) the Prepayment Charges on deposit, and
         remit such amount to the Trustee for deposit in the Distribution
         Account; and

                  (x) to clear and terminate the Certificate Account upon
         termination of this Agreement pursuant to Section 9.01.

         The Servicer shall keep and maintain separate accounting, on a Mortgage
Loan by Mortgage Loan basis, to justify any withdrawal from the Certificate
Account pursuant to subclauses (i), (ii), (iv), (v), and (vi). Before making any
withdrawal from the Certificate Account pursuant to subclause (iii), the
Servicer shall deliver to the Trustee an Officer's Certificate of a Servicing
Officer indicating the amount

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<PAGE>

of any previous Advance determined by the Servicer to be a Nonrecoverable
Advance and identifying the related Mortgage Loans and their respective portions
of the Nonrecoverable Advance.

         In addition to the amounts remitted to the Trustee by the Servicer from
the Certificate Account, by the Distribution Account Deposit Date, the Servicer
shall remit all Late Payment Fees assessable and not waived pursuant to Section
3.21(a) to the Trustee for deposit in the Distribution Account.

         (b) The Trustee shall withdraw funds from the Distribution Account for
distributions to Certificateholders in the manner specified in this Agreement
(and to withhold from the amounts so withdrawn the amount of any taxes that it
is authorized to withhold pursuant to the third paragraph of Section 8.11). In
addition, the Trustee may from time to time make withdrawals from the
Distribution Account for the following purposes:

                  (i) to pay to itself the Trustee Fee for the related
         Distribution Date;

                  (ii) to withdraw and return to the Servicer any amount
         deposited in the Distribution Account and not required to be deposited
         therein; and

                  (iii) to clear and terminate the Distribution Account upon
         termination of the Agreement pursuant to Section 9.01.

         (c) On each Distribution Date, the Trustee shall make withdrawals from
the Swap Account in the manner specified in Section 3.06 (and to withhold from
the amounts so withdrawn the amount of any taxes that it is authorized to retain
pursuant to the third paragraph of Section 8.11). In addition, the Trustee may
from time to time make withdrawals from the Swap Account for the following
purposes:

                  (i) to withdraw any amount deposited in the Swap Account and
         not required to be deposited therein; and

                  (ii) to clear and terminate the Swap Account upon the earlier
         of (x) the Swap Contract Termination Date and (y) the termination of
         this Agreement pursuant to Section 9.01.

         Section 3.10 Maintenance of Hazard Insurance; Maintenance of Primary
Insurance Policies.

         (a) The Servicer shall maintain, for each Mortgage Loan, hazard
insurance with extended coverage in an amount that is at least equal to the
lesser of

         (i) the maximum insurable value of the improvements securing the
Mortgage Loan and

         (ii) the greater of (y) the outstanding principal balance of the
Mortgage Loan and (z) an amount such that the proceeds of the policy are
sufficient to prevent the Mortgagor or the mortgagee from becoming a co-insurer.

         Each policy of standard hazard insurance shall contain, or have an
accompanying endorsement that contains, a standard mortgagee clause. Any amounts
collected under the policies (other than the amounts to be applied to the
restoration or repair of the related Mortgaged Property or amounts released to
the Mortgagor in accordance with the Servicer's normal servicing procedures)
shall be deposited in the Certificate Account. Any cost incurred in maintaining
any insurance shall not, for the purpose of calculating monthly distributions to
the Certificateholders or remittances to the Trustee for their benefit, be added
to the principal balance of the Mortgage Loan, notwithstanding that the Mortgage
Loan so

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<PAGE>

permits. Such costs shall be recoverable by the Servicer out of late payments
(other than Late Payment Fees) by the related Mortgagor or out of Liquidation
Proceeds to the extent permitted by Section 3.09. No earthquake or other
additional insurance is to be required of any Mortgagor or maintained on
property acquired in respect of a Mortgage other than pursuant to any applicable
laws and regulations in force that require additional insurance. If the
Mortgaged Property is located at the time of origination of the Mortgage Loan in
a federally designated special flood hazard area and the area is participating
in the national flood insurance program, the Servicer shall maintain flood
insurance for the Mortgage Loan. The flood insurance shall be in an amount equal
to the least of (i) the original principal balance of the related Mortgage Loan,
(ii) the replacement value of the improvements that are part of the Mortgaged
Property, and (iii) the maximum amount of flood insurance available for the
related Mortgaged Property under the national flood insurance program.

         If the Servicer obtains and maintains a blanket policy insuring against
hazard losses on all of the Mortgage Loans, it shall have satisfied its
obligations in the first sentence of this Section 3.10. The policy may contain a
deductible clause on terms substantially equivalent to those commercially
available and maintained by comparable servicers. If the policy contains a
deductible clause and a policy complying with the first sentence of this Section
3.10 has not been maintained on the related Mortgaged Property, and if a loss
that would have been covered by the required policy occurs, the Servicer shall
deposit in the Certificate Account, without any right of reimbursement, the
amount not otherwise payable under the blanket policy because of the deductible
clause. In connection with its activities as Servicer of the Mortgage Loans, the
Servicer agrees to present, on behalf of itself, the Depositor, and the Trustee
for the benefit of the Certificateholders, claims under any blanket policy.

         (b) The Servicer shall not take any action that would result in
non-coverage under any applicable Primary Insurance Policy of any loss that, but
for the actions of the Servicer, would have been covered thereunder. The
Servicer shall not cancel or refuse to renew any Primary Insurance Policy that
is in effect at the date of the initial issuance of the Certificates and is
required to be kept in force hereunder unless the replacement Primary Insurance
Policy for the canceled or non-renewed policy is maintained with a Qualified
Insurer. The Servicer need not maintain any Primary Insurance Policy if
maintaining the Primary Insurance Policy is prohibited by applicable law. The
Servicer agrees, to the extent permitted by applicable law, to effect the timely
payment of the premiums on each Primary Insurance Policy, and any costs not
otherwise recoverable shall be recoverable by the Servicer from the related
liquidation proceeds.

         In connection with its activities as Servicer of the Mortgage Loans,
the Servicer agrees to present, on behalf of itself, the Trustee and the
Certificateholders, claims to the insurer under any Primary Insurance Policies
and, in this regard, to take any reasonable action in accordance with the
Servicing Standard necessary to permit recovery under any Primary Insurance
Policies respecting defaulted Mortgage Loans. Any amounts collected by the
Servicer under any Primary Insurance Policies shall be deposited in the
Certificate Account.

         Section 3.11 Enforcement of Due-On-Sale Clauses; Assumption Agreements.

         (a) Except as otherwise provided in this Section 3.11, when any
property subject to a Mortgage has been conveyed by the Mortgagor, the Servicer
shall to the extent that it has knowledge of the conveyance and in accordance
with the Servicing Standard, enforce any due-on-sale clause contained in any
Mortgage Note or Mortgage, to the extent permitted under applicable law and
governmental regulations, but only to the extent that enforcement will not
adversely affect or jeopardize coverage under any Required Insurance Policy.
Notwithstanding the foregoing, the Servicer is not required to exercise these
rights with respect to a Mortgage Loan if the Person to whom the related
Mortgaged Property has been conveyed or is proposed to be conveyed satisfies the
conditions contained in the Mortgage Note and

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<PAGE>

Mortgage related thereto and the consent of the mortgagee under the Mortgage
Note or Mortgage is not otherwise so required under the Mortgage Note or
Mortgage as a condition to the transfer.

         If (i) the Servicer is prohibited by law from enforcing any due-on-sale
clause, (ii) coverage under any Required Insurance Policy would be adversely
affected, (iii) the Mortgage Note does not include a due-on-sale clause, or (iv)
nonenforcement is otherwise permitted hereunder, the Servicer is authorized,
subject to Section 3.11(b), to take or enter into an assumption and modification
agreement from or with the person to whom the property has been or is about to
be conveyed, pursuant to which the person becomes liable under the Mortgage Note
and, unless prohibited by applicable state law, the Mortgagor remains liable
thereon. The Mortgage Loan must continue to be covered (if so covered before the
Servicer enters into the agreement) by the applicable Required Insurance
Policies.

         The Servicer, subject to Section 3.11(b), is also authorized with the
prior approval of the insurers under any Required Insurance Policies to enter
into a substitution of liability agreement with the Person, pursuant to which
the original Mortgagor is released from liability and the Person is substituted
as Mortgagor and becomes liable under the Mortgage Note. Notwithstanding the
foregoing, the Servicer shall not be deemed to be in default under this Section
3.11 because of any transfer or assumption that the Servicer reasonably believes
it is restricted by law from preventing, for any reason whatsoever.

         (b) Subject to the Servicer's duty to enforce any due-on-sale clause to
the extent set forth in Section 3.11(a), in any case in which a Mortgaged
Property has been conveyed to a Person by a Mortgagor, and the Person is to
enter into an assumption agreement or modification agreement or supplement to
the Mortgage Note or Mortgage that requires the signature of the Trustee, or if
an instrument of release signed by the Trustee is required releasing the
Mortgagor from liability on the Mortgage Loan, the Servicer shall prepare and
deliver to the Trustee for signature and shall direct the Trustee, in writing,
to execute the assumption agreement with the Person to whom the Mortgaged
Property is to be conveyed, and the modification agreement or supplement to the
Mortgage Note or Mortgage or other instruments appropriate to carry out the
terms of the Mortgage Note or Mortgage or otherwise to comply with any
applicable laws regarding assumptions or the transfer of the Mortgaged Property
to the Person. In connection with any such assumption, no material term of the
Mortgage Note may be changed.

         In addition, the substitute Mortgagor and the Mortgaged Property must
be acceptable to the Servicer in accordance with its underwriting standards as
then in effect. Together with each substitution, assumption, or other agreement
or instrument delivered to the Trustee for execution by it, the Servicer shall
deliver an Officer's Certificate signed by a Servicing Officer stating that the
requirements of this subsection have been met in connection with such Officer's
Certificate. The Servicer shall notify the Trustee that any substitution or
assumption agreement has been completed by forwarding to the Trustee the
original of the substitution or assumption agreement, which in the case of the
original shall be added to the related Mortgage File and shall, for all
purposes, be considered a part of the Mortgage File to the same extent as all
other documents and instruments constituting a part of the Mortgage File. The
Servicer will retain any fee collected by it for entering into an assumption or
substitution of liability agreement as additional servicing compensation.

         Section 3.12 Realization Upon Defaulted Mortgage Loans.

         The Servicer shall use reasonable efforts in accordance with the
Servicing Standard to foreclose on or otherwise comparably convert the ownership
of assets securing such of the Mortgage Loans as come into and continue in
default and as to which no satisfactory arrangements can be made for collection
of delinquent payments. In connection with the foreclosure or other conversion,
the Servicer shall follow the Servicing Standard and shall follow the
requirements of the insurer under any Required Insurance Policy. The Servicer
shall not be required to expend its own funds in connection with any foreclosure
or

                                       63
<PAGE>

towards the restoration of any property unless it determines (i) that the
restoration or foreclosure will increase the proceeds of liquidation of the
Mortgage Loan after reimbursement to itself of restoration expenses and (ii)
that restoration expenses will be recoverable to it through Liquidation Proceeds
(respecting which it shall have priority for purposes of withdrawals from the
Certificate Account). The Servicer shall be responsible for all other costs and
expenses incurred by it in any foreclosure proceedings. The Servicer is entitled
to reimbursement of such costs and expenses from the liquidation proceeds with
respect to the related Mortgaged Property, as provided in the definition of
Liquidation Proceeds. If the Servicer has knowledge that a Mortgaged Property
that the Servicer is contemplating acquiring in foreclosure or by deed in lieu
of foreclosure is located within a one mile radius of any site listed in the
Expenditure Plan for the Hazardous Substance Clean Up Bond Act of 1984 or other
site with environmental or hazardous waste risks known to the Servicer, the
Servicer will, before acquiring the Mortgaged Property, consider the risks and
only take action in accordance with its established environmental review
procedures.

         With respect to any REO Property, the deed or certificate of sale shall
be taken in the name of the Trustee for the benefit of the Certificateholders,
or its nominee, on behalf of the Certificateholders. The Trustee's name shall be
placed on the title to the REO Property solely as the Trustee hereunder and not
in its individual capacity. The Servicer shall ensure that the title to the REO
Property references the Pooling and Servicing Agreement and the Trustee's
capacity hereunder. Pursuant to its efforts to sell the REO Property, the
Servicer shall either itself or through an agent selected by the Servicer
protect and conserve the REO Property in accordance with the Servicing Standard.

         The Servicer shall perform the tax reporting and withholding required
by sections 1445 and 6050J of the Code with respect to foreclosures and
abandonments, the tax reporting required by section 6050H of the Code with
respect to the receipt of mortgage interest from individuals and, if required by
section 6050P of the Code with respect to the cancellation of indebtedness by
certain financial entities, by preparing any required tax and information
returns, in the form required.

         If the Trust Fund acquires any Mortgaged Property as aforesaid or
otherwise in connection with a default or imminent default on a Mortgage Loan,
the REO Property shall only be held temporarily, shall be actively marketed for
sale, and the Servicer shall dispose of the Mortgaged Property as soon as
practicable, and in any case before the end of the third calendar year following
the calendar year in which the Trust Fund acquires the property. Notwithstanding
any other provision of this Agreement, no Mortgaged Property acquired by the
Trust Fund shall be rented (or allowed to continue to be rented) or otherwise
used for the production of income by or on behalf of the Trust Fund.

         The decision of the Servicer to foreclose on a defaulted Mortgage Loan
shall be subject to a determination by the Servicer that the proceeds of the
foreclosure would exceed the costs and expenses of bringing a foreclosure
proceeding. The proceeds received from the maintenance of any REO Properties,
net of reimbursement to the Servicer for costs incurred (including any property
or other taxes) in connection with maintenance of the REO Properties and net of
unreimbursed Servicing Fees, Advances, and Servicing Advances, shall be applied
to the payment of principal of and interest on the related defaulted Mortgage
Loans (with interest accruing as though the Mortgage Loans were still current
and adjustments, if applicable, to the Mortgage Rate were being made in
accordance with the Mortgage Note) and all such proceeds shall be deemed, for
all purposes in this Agreement, to be payments on account of principal and
interest on the related Mortgage Notes and shall be deposited into the
Certificate Account. To the extent the net proceeds received during any calendar
month exceeds the amount attributable to amortizing principal and accrued
interest at the related Mortgage Rate on the related Mortgage Loan for the
calendar month, the excess shall be considered to be a partial prepayment of
principal of the related Mortgage Loan.

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<PAGE>

         The proceeds from any liquidation of a Mortgage Loan, as well as any
proceeds from an REO Property, will be applied in the following order of
priority: first, to reimburse the Servicer for any related unreimbursed
Servicing Advances or Servicing Fees or for any related unreimbursed Advances,
as applicable; second, to reimburse the Servicer, as applicable, and to
reimburse the Certificate Account for any Nonrecoverable Advances (or portions
thereof) that were previously withdrawn by the Servicer pursuant to Section
3.09(a)(iii) that related to the Mortgage Loan; third, to accrued and unpaid
interest (to the extent no Advance has been made for such amount or any such
Advance has been reimbursed) on the Mortgage Loan or related REO Property, at
the Adjusted Net Mortgage Rate to the Due Date occurring in the month in which
such amounts are required to be distributed; and fourth, as a recovery of
principal of the Mortgage Loan. The Servicer will retain any Excess Proceeds
from the liquidation of a Liquidated Mortgage Loan as additional servicing
compensation pursuant to Section 3.15.

         The Servicer may agree to a modification of any Mortgage Loan at the
request of the related Mortgagor if (i) the modification is in lieu of a
refinancing and (ii) the Servicer purchases that Mortgage Loan from the Trust
Fund as described below. Upon the agreement of the Servicer to modify a Mortgage
Loan in accordance with the preceding sentence, the Servicer shall purchase that
Mortgage Loan and all interest of the Trustee in that Mortgage Loan shall
automatically be deemed transferred and assigned to the Servicer and all
benefits and burdens of ownership thereof, including the right to accrued
interest thereon from the date of purchase and the risk of default thereon,
shall pass to the Servicer. The Servicer shall promptly deliver to the Trustee a
certification of a Servicing Officer to the effect that all requirements of this
paragraph have been satisfied with respect to a Mortgage Loan to be repurchased
pursuant to this paragraph.

         The Servicer shall deposit the Purchase Price for any Mortgage Loan
repurchased pursuant to Section 3.12 in the Certificate Account pursuant to
Section 3.06 within one Business Day after the purchase of the Mortgage Loan.
Upon receipt by the Trustee of written notification of any such deposit signed
by a Servicing Officer, the Trustee shall release to the Servicer the related
Mortgage File and shall execute and deliver such instruments of transfer or
assignment, in each case without recourse, as shall be necessary to vest in the
Servicer any Mortgage Loan previously transferred and assigned pursuant hereto.
The Servicer covenants and agrees to indemnify the Trust Fund against any
liability for any "prohibited transaction" taxes and any related interest,
additions, and penalties imposed on the Trust Fund established hereunder as a
result of any modification of a Mortgage Loan effected pursuant to this Section,
or any purchase of a Mortgage Loan by the Servicer in connection with a
modification (but such obligation shall not prevent the Servicer or any other
appropriate Person from contesting any such tax in appropriate proceedings and
shall not prevent the Servicer from withholding payment of such tax, if
permitted by law, pending the outcome of such proceedings). The Servicer shall
have no right of reimbursement for any amount paid pursuant to the foregoing
indemnification, except to the extent that the amount of any tax, interest, and
penalties, together with interest thereon, is refunded to the Trust Fund.

         Section 3.13 Trustee to Cooperate; Release of Mortgage Files.

         Upon the payment in full of any Mortgage Loan, or the receipt by the
Servicer of a notification that payment in full will be escrowed in a manner
customary for such purposes, the Servicer will immediately notify the Trustee by
delivering a Request for Release substantially in the form of Exhibit N. Upon
receipt of the request, the Trustee shall promptly release the related Mortgage
File to the Servicer, and the Trustee shall at the Servicer's direction execute
and deliver to the Servicer the request for reconveyance, deed of reconveyance,
or release or satisfaction of mortgage or such instrument releasing the lien of
the Mortgage in each case provided by the Servicer, together with the Mortgage
Note with written evidence of cancellation thereon. The Servicer is authorized
to cause the removal from the registration on the MERS System of such Mortgage
and to execute and deliver, on behalf of the Trustee and the Certificateholders
or any of them, any and all instruments of satisfaction or cancellation or of

                                       65
<PAGE>

partial or full release. Expenses incurred in connection with any instrument of
satisfaction or deed of reconveyance shall be chargeable to the related
Mortgagor.

         From time to time and as shall be appropriate for the servicing or
foreclosure of any Mortgage Loan, including for such purpose collection under
any policy of flood insurance, any fidelity bond or errors or omissions policy,
or for the purposes of effecting a partial release of any Mortgaged Property
from the lien of the Mortgage or the making of any corrections to the Mortgage
Note or the Mortgage or any of the other documents included in the Mortgage
File, the Trustee shall, upon delivery to the Trustee of a Request for Release
in the form of Exhibit M signed by a Servicing Officer, release the Mortgage
File to the Servicer or its designee. Subject to the further limitations set
forth below, the Servicer shall cause the Mortgage File or documents so released
to be returned to the Trustee when the need therefor by the Servicer no longer
exists, unless the Mortgage Loan is liquidated and the proceeds thereof are
deposited in the Certificate Account, in which case the Servicer shall deliver
to the Trustee a Request for Release in the form of Exhibit N, signed by a
Servicing Officer.

         If the Servicer at any time seeks to initiate a foreclosure proceeding
in respect of any Mortgaged Property as authorized by this Agreement, the
Servicer shall deliver to the Trustee, for signature, as appropriate, any court
pleadings, requests for trustee's sale, or other documents necessary to
effectuate such foreclosure or any legal action brought to obtain judgment
against the Mortgagor on the Mortgage Note or the Mortgage or to obtain a
deficiency judgment or to enforce any other remedies or rights provided by the
Mortgage Note or the Mortgage or otherwise available at law or in equity.

         Section 3.14 Documents, Records and Funds in Possession of the Servicer
to be Held for the Trustee.

         The Servicer shall account fully to the Trustee for any funds it
receives or otherwise collects as Liquidation Proceeds or Insurance Proceeds in
respect of any Mortgage Loan. All Mortgage Files and funds collected or held by,
or under the control of, the Servicer in respect of any Mortgage Loans, whether
from the collection of principal and interest payments or from Liquidation
Proceeds, including any funds on deposit in the Certificate Account, shall be
held by the Servicer for and on behalf of the Trustee and shall be and remain
the sole and exclusive property of the Trustee, subject to the applicable
provisions of this Agreement. The Servicer also agrees that it shall not create,
incur or subject any Mortgage File or any funds that are deposited in the
Certificate Account, Distribution Account, or any Escrow Account, or any funds
that otherwise are or may become due or payable to the Trustee for the benefit
of the Certificateholders, to any claim, lien, security interest, judgment,
levy, writ of attachment, or other encumbrance, or assert by legal action or
otherwise any claim or right of setoff against any Mortgage File or any funds
collected on, or in connection with, a Mortgage Loan, except, however, that the
Servicer shall be entitled to set off against and deduct from any such funds any
amounts that are properly due and payable to the Servicer under this Agreement.

         Section 3.15 Servicing Compensation.

         The Servicer may retain or withdraw from the Certificate Account the
Servicing Fee for each Mortgage Loan for the related Distribution Date. If the
Servicer directly services a Mortgage Loan, the Servicer may retain the
Servicing Fee for its own account as compensation for performing services.
Notwithstanding the foregoing, the Servicing Fee payable to the Servicer shall
be reduced by the lesser of the aggregate of the Prepayment Interest Shortfalls
with respect to the Distribution Date and the aggregate Compensating Interest
for the Distribution Date.

         Additional servicing compensation in the form of Excess Proceeds,
Prepayment Interest Excess, assumption fees and all income net of any losses
realized from Permitted Investments shall be retained by

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<PAGE>

the Servicer to the extent not required to be deposited in the Certificate
Account pursuant to Section 3.06. The Servicer shall be required to pay all
expenses incurred by it in connection with its servicing activities hereunder
(including the payment of any premiums for hazard insurance, and any Primary
Insurance Policy and maintenance of the other forms of insurance coverage
required by this Agreement) and shall not be entitled to reimbursement therefor
except as specifically provided in this Agreement.

         Section 3.16 Access to Certain Documentation.

         The Servicer shall provide to the OTS and the FDIC and to comparable
regulatory authorities supervising Holders of Certificates and Certificate
Owners and the examiners and supervisory agents of the OTS, the FDIC, and such
other authorities, access to the documentation regarding the Mortgage Loans
required by applicable regulations of the OTS and the FDIC. Access shall be
afforded without charge, but only upon reasonable prior written request and
during normal business hours at the offices designated by the Servicer. Nothing
in this Section 3.16 shall limit the obligation of the Servicer to observe any
applicable law prohibiting disclosure of information regarding the Mortgagors
and the failure of the Servicer to provide access as provided in this Section
3.16 as a result of such obligation shall not constitute a breach of this
Section 3.16.

         Section 3.17 Annual Statement as to Compliance.

         (a) By March 15 of each year, commencing with 2008, the Servicer shall
deliver to the Trustee via electronic mail (DBSEC.Notifications@db.com) and the
Depositor an Officer's Certificate signed by two Servicing Officers stating, as
to each signer thereof, that (i) a review of the activities of the Servicer
during the preceding calendar year (or applicable portion thereof) and of the
performance of the Servicer under this Agreement has been made under such
officer's supervision, and (ii) to the best of such officer's knowledge, based
on the review, the Servicer has fulfilled all its obligations under this
Agreement, in all material respects throughout the year (or applicable portion
thereof), or, if there has been a failure to fulfill any obligation in any
material respect, specifying each failure known to the officer and the nature
and status thereof.

         (b) [Reserved].

         (c) Copies of such statement shall be provided by the Trustee to any
Certificateholder or Certificate Owner upon request at the Servicer's expense,
provided such statement is delivered by the Servicer to the Trustee.

         Section 3.18 Errors and Omissions Insurance; Fidelity Bonds.

         The Servicer shall obtain and maintain in force (a) policies of
insurance covering errors and omissions in the performance of its obligations as
Servicer hereunder and (b) a fidelity bond covering its officers, employees, and
agents. Each policy and bond shall, together, comply with the requirements from
time to time of FNMA or FHLMC for persons performing servicing for mortgage
loans purchased by FNMA or FHLMC. If any policy or bond ceases to be in effect,
the Servicer shall obtain a comparable replacement policy or bond from an
insurer or issuer meeting the above requirements as of the date of the
replacement.

         Section 3.19 The Swap Contract.

         The Depositor shall cause the Supplemental Interest Trustee, on behalf
of the Supplemental Interest Trust, to enter into the Swap Contract. The
Supplemental Interest Trustee's rights to receive certain proceeds of the Swap
Contract shall not be an asset of the Trust Fund or of any REMIC. The

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Supplemental Interest Trustee shall deposit any amounts received from time to
time from the Swap Counterparty into the Swap Account.

         The Supplemental Interest Trustee shall (i) be subject to a standard of
care and (ii) be entitled to all of the rights, privileges, immunities and
indemnities, in each case identical to that of the Trustee under Article Eight
of this Agreement.

         Upon the Supplemental Interest Trustee obtaining actual knowledge of
the rating of the Swap Counterparty falling below the relevant levels set forth
in the Swap Contract (provided, however, that the Supplemental Interest Trustee
shall have no obligation to conduct an independent investigation or inquiry in
relation thereto), the Depositor shall instruct the Supplemental Interest
Trustee in writing to enforce its rights thereunder. Such Instructions shall be
specific as to mode or method of enforcement. If the Swap Counterparty
appropriately elects to post collateral under the Credit Support Annex executed
on the Closing Date, the Supplemental Interest Trustee shall demand payment of
the Delivery Amount (as defined in the ISDA Credit Support Annex). The
Supplemental Interest Trustee shall set up the Collateral Account in accordance
with Section 3.06 to hold such cash or other eligible investments pledged under
such ISDA Credit Support Annex. Any cash or other eligible investments pledged
under an ISDA Credit Support Annex shall not be part of the Swap Account or the
Distribution Account unless they are applied in accordance with such ISDA Credit
Support Annex to make a payment due to the Supplemental Interest Trustee
pursuant to the Swap Contract.

         Upon the Supplemental Interest Trustee obtaining actual knowledge of an
Event of Default (as defined in the Swap Contract) or Termination Event (as
defined in the Swap Contract) for which the Supplemental Interest Trustee has
the right to designate an Early Termination Date (as defined in the Swap
Contract) (provided, however, that the Supplemental Interest Trustee shall have
no obligation to conduct an independent investigation or inquiry in relation
thereto), the Depositor shall instruct the Supplemental Interest Trustee in
writing as to whether to designate an Early Termination Date; provided, however,
that the Supplemental Interest Trustee shall provide written notice to each
Rating Agency following the Event of Default or Termination Event. Upon the
termination of the Swap Contract under the circumstances contemplated by this
Section 3.19(b), the Supplemental Interest Trustee shall use its reasonable best
efforts to enforce its rights as may be permitted by the terms of the Swap
Contract and consistent with the terms of this Agreement.

         Notwithstanding any other provision in this Agreement, in the event
that the Swap Contract is terminated and the Supplemental Interest Trust enters
into a replacement swap contract and the Supplemental Interest Trust is entitled
to receive a payment from a replacement swap counterparty, the Supplemental
Interest Trustee shall direct the replacement swap counterparty to make such
payment to the Swap Account in accordance with the provisions of this paragraph.
The Supplemental Interest Trustee shall pay to the Swap Counterparty the lesser
of (x) the amount so received and (y) any Swap Termination Payment owed to the
Swap Counterparty (to the extent not already paid by the Supplemental Interest
Trust) that is being replaced immediately upon receipt of the replacement swap
counterparty payment, regardless of whether the date of receipt thereof is a
Distribution Date; provided that to the extent that the replacement swap
counterparty payment is less than the Swap Termination Payment owed to the Swap
Counterparty, any remaining amounts will be paid to the Swap Counterparty on the
subsequent Distribution Date (unless the replacement swap counterparty payment
is paid to the Swap Counterparty on a Distribution Date, in which case such
remaining amounts will be paid on such Distribution Date) in accordance with the
priority of payments described in Section 4.02 of this Agreement. For the
avoidance of doubt, the parties agree that the Swap Counterparty shall have
first priority to any replacement swap counterparty payment over the payment by
the Supplemental Interest Trust to Certificateholders, any servicer, any
custodian, the Trustee, Supplemental Interest Trustee or any other Person.

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         In the event that the Swap Counterparty pays any Swap Termination
Payment to the Supplemental Interest Trustee, any portion of such Swap
Termination Payment paid by the Swap Counterparty that is remitted to the
Supplemental Interest Trustee shall be available to pay any upfront amount due
to a replacement swap provider with respect to the related replacement swap
contract, and thereafter for distribution in the manner described in Section
4.02(c).

         The Swap Counterparty shall be an express third party beneficiary of
any obligation under this Agreement that specifically affects its rights to
receive any payment due to it and available to be paid to it to the extent
received by the Supplemental Interest Trustee under this Agreement or to the
return of collateral under this Agreement and any other express rights of the
Swap Counterparty explicitly set forth under this Agreement and the Swap
Contract, and for purposes of the standard of care under this Agreement, solely
to the extent of the Supplemental Interest Trustee's negligence or willful
misconduct as it relates to the above described obligations owed to the Swap
Counterparty by the Supplemental Interest Trustee under this Agreement.

         Notwithstanding anything herein to the contrary, any responsibility of
the Supplemental Interest Trustee hereunder or under the Swap Contract to make
any payment to the Swap Counterparty, or receive any payment from the Swap
Counterparty, as applicable, shall be subject to the receipt of timely, accurate
and available information from the Servicer and the Swap Counterparty pursuant
to the terms of this Agreement and Swap Contract, as applicable.

         Section 3.20 Notification of Adjustments.

         On each Adjustment Date, the Servicer shall make interest rate
adjustments for each Mortgage Loan in compliance with the requirements of the
related Mortgage and Mortgage Note and applicable regulations. The Servicer
shall execute and deliver the notices required by each Mortgage and Mortgage
Note and applicable regulations regarding interest rate adjustments. The
Servicer also shall provide timely notification to the Trustee of all applicable
data and information regarding such interest rate adjustments and the Servicer's
methods of implementing such interest rate adjustments. Upon the discovery by
the Servicer or the Trustee that the Servicer has failed to adjust or has
incorrectly adjusted a Mortgage Rate or a monthly payment pursuant to the terms
of the related Mortgage Note and Mortgage, the Servicer shall immediately
deposit in the Certificate Account from its own funds the amount of any loss
caused thereby without reimbursement therefor; provided, however, the Servicer
shall not be liable with respect to any interest rate adjustments made by any
servicer prior to the Servicer.

         Section 3.21 Prepayment Charges.

         (a) The Servicer will not waive any part of any Prepayment Charge
unless the waiver relates to a default or a reasonably foreseeable default, the
Prepayment Charge would cause an undue hardship to the related borrower, the
Mortgaged Property is sold by the Mortgagor, the collection of any Prepayment
Charge would violate any relevant law or regulation or the waiving of the
Prepayment Charge would otherwise benefit the Trust Fund and it is expected that
the waiver would maximize recovery of total proceeds taking into account the
value of the Prepayment Charge and related Mortgage Loan and doing so is
standard and customary in servicing similar Mortgage Loans (including any waiver
of a Prepayment Charge in connection with a refinancing of a Mortgage Loan that
is related to a default or a reasonably foreseeable default). The Servicer will
not waive a Prepayment Charge in connection with a refinancing of a Mortgage
Loan that is not related to a default or a reasonably foreseeable default.

         (b) If a Prepayment Charge is waived other than as permitted by the
prior paragraph, then the Servicer is required to pay the amount of such waived
Prepayment Charge, for the benefit of the Holders of the Class P-1 or Class P-2
Certificates, as applicable, by depositing such amount into the Distribution

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Account from its own funds, without any right of reimbursement therefor,
together with and at the time that the amount prepaid on the related Mortgage
Loan is required to be deposited into the Distribution Account.

         (c) The Seller represents and warrants to the Depositor and the
Trustee, as of the Closing Date, that the information relating to the type of
Prepayment Charges and the Prepayment Charge Period in the Mortgage Loan
Schedule is complete and accurate in all material respects at the dates as of
which the information is furnished and each Prepayment Charge is permissible and
enforceable in accordance with its terms under applicable state law, except as
the enforceability thereof is limited due to acceleration in connection with a
foreclosure or other involuntary payment.

         (d) Upon discovery by the Servicer or upon actual knowledge by a
Responsible Officer of the Trustee (provided, however, that the Trustee shall
have no obligation to conduct an independent investigation or inquiry in
relation thereto) of a breach of the foregoing clause (c) that materially and
adversely affects the right of the Holders of the Class P-1 or Class P-2
Certificates, as applicable, to any Prepayment Charge, the party discovering the
breach shall give prompt written notice to the other parties. Within 60 days of
the earlier of discovery by the Servicer or receipt of notice by the Servicer of
breach, the Servicer shall cure the breach in all material respects or shall pay
into the Certificate Account the amount of the Prepayment Charge that would
otherwise be due from the Mortgagor, less any amount representing such
Prepayment Charge previously collected and paid by the Servicer into the
Certificate Account.

         Section 3.22 Late Payment Fees.

         (a) The Servicer shall not waive any part of any Late Payment Fee
unless (i) the collection of any Late Payment Fee would violate any relevant law
or regulation or (ii) the waiving of the Late Payment Fee would otherwise
benefit the Trust Fund and it is expected that the waiver would maximize
recovery of total proceeds, taking into account the value of the Late Payment
Fee and related Mortgage Loan and doing so is standard and customary in
servicing similar Mortgage Loans (including the waiver of a Late Payment Fee in
connection with a refinancing of a Mortgage Loan that is related to a default or
reasonably foreseeable default).

         (b) If the covenants made by the Servicer in clause (a) above is
breached, the Servicer must pay into the Certificate Account prior to the
Distribution Account Deposit Date following the end of the related Prepayment
Period the amount of the waived Late Payment Fee.

         (c) The Servicer shall remit Late Payment Fees assessable and not
waived pursuant to clause (a) above in accordance with Section 3.09.

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                                  ARTICLE FOUR

                   DISTRIBUTIONS AND ADVANCES BY THE SERVICER

         Section 4.01 Advances.

         (a) The Servicer shall determine on or before each Servicer Advance
Date whether it is required to make an Advance pursuant to the definition
thereof. If the Servicer determines it is required to make an Advance, it shall,
on or before the Servicer Advance Date, either (i) deposit into the Certificate
Account an amount equal to the Advance or (ii) make an appropriate entry in its
records relating to the Certificate Account that any Amount Held for Future
Distribution has been used by the Servicer in discharge of its obligation to
make any such Advance. Any funds so applied shall be replaced by the Servicer by
deposit in the Certificate Account no later than the close of business on the
next Servicer Advance Date. The Servicer shall be entitled to be reimbursed from
the Certificate Account for all Advances of its own funds made pursuant to this
Section 4.01 as provided in Section 3.09. The obligation to make Advances with
respect to any Mortgage Loan shall continue if such Mortgage Loan has been
foreclosed or otherwise terminated and the Mortgaged Property has not been
liquidated. The Servicer shall inform the Trustee of the amount of the Advance
to be made on each Servicer Advance Date no later than the second Business Day
before the related Distribution Date.

         (b) If the Servicer determines that it will be unable to comply with
its obligation to make the Advances as and when described in the second sentence
of Section 4.01(a), it shall use its best efforts to give written notice thereof
to the Trustee (each such notice an "Advance Notice"; and such notice may be
given by telecopy), not later than 3:00 P.M., New York time, on the Business Day
immediately preceding the related Servicer Advance Date, specifying the amount
that it will be unable to deposit (each such amount an "Advance Deficiency") and
certifying that such Advance Deficiency constitutes an Advance hereunder and is
not a Nonrecoverable Advance. If the Trustee receives a Trustee Advance Notice
on or before 3:00 P.M., New York time on a Servicer Advance Date, the Trustee is
entitled to immediately terminate the Servicer under Section 7.01, and shall,
not later than 3:00 P.M., New York time, on the related Distribution Date,
deposit in the Distribution Account an amount equal to the Advance Deficiency
identified in such Trustee Advance Notice unless it is prohibited from so doing
by applicable law. Notwithstanding the foregoing, the Trustee shall not be
required to make such deposit if the Trustee shall have received written
notification from the Servicer that the Servicer has deposited or caused to be
deposited in the Certificate Account an amount equal to such Advance Deficiency
by 3:00 P.M. New York time on the related Distribution Date. If the Trustee has
not terminated the Servicer, the Servicer shall reimburse the Trustee for the
amount of any Advance (including interest at the Prime Rate on the day of such
reimbursement published in The Wall Street Journal) on such amount, made by the
Trustee pursuant to this Section 4.01(b) not later than the second day following
the related Servicer Advance Date. In the event that the Servicer does not
reimburse the Trustee in accordance with the requirements of the preceding
sentence, the Trustee shall immediately (a) terminate all of the rights and
obligations of the Servicer under this Agreement in accordance with Section 7.01
and (b) subject to the limitations set forth in Section 3.05, assume all of the
rights and obligations of the Servicer hereunder.

         (c) The Servicer shall, not later than the close of business on the
Business Day immediately preceding each Servicer Advance Date, deliver to the
Trustee a report (in form and substance reasonably satisfactory to the Trustee)
that indicates (i) the Mortgage Loans with respect to which the Servicer has
determined that the related Scheduled Payments should be advanced and (ii) the
amount of the related Scheduled Payments. The Servicer shall deliver to the
Trustee on the related Servicer Advance Date an Officer's Certificate of a
Servicing Officer indicating the amount of any proposed Advance determined by
the Servicer to be a Nonrecoverable Advance.

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         Section 4.02 Priorities of Distribution.

         (a) (1) On each Distribution Date, the Trustee shall withdraw the
Available Funds for Loan Group 1 from the Distribution Account and apply such
funds to distributions on the Group 1 Senior Certificates in the following
priority, in each case, to the extent of Available Funds remaining:

                  (i) concurrently, to each interest-bearing Class or Component
         of Group 1 Senior Certificates, an amount allocable to interest equal
         to the related Class Optimal Interest Distribution Amount, any
         shortfall being allocated among such Classes in proportion to the
         amount of the Class Optimal Interest Distribution Amount that would
         have been distributed in the absence of such shortfall; provided, that
         for so long as the Swap Contract is in effect and thereafter to the
         extent a Swap Termination Payment is due to the Swap Counterparty other
         than as a result of a Swap Counterparty Trigger Event, the Class
         Optimal Interest Distribution Amount for the Class A-1-1 Component
         shall be distributed to the Swap Account; provided further, that after
         the Swap Contract Termination Date, any portion of the Excess Interest
         attributable to the Class A-1-1 Component shall be distributed pursuant
         to Section 4.02(g);

                  (ii) [reserved];

                  (iii) concurrently, to each Class of Group 1 Senior
         Certificates as follows:

                           (A)      [reserved]; and

                           (B)      on each Distribution Date, the Principal
                                    Amount for Loan Group 1, up to the amount of
                                    the related Senior Principal Distribution
                                    Amount for such Distribution Date will be
                                    distributed in the following priority:

                                            (a) to the Class A-R Certificates,
                                            until its Class Certificate Balance
                                            is reduced to zero; and

                                            (b) concurrently, to the Class 1-A-2
                                            Certificates and the Class A-1-1
                                            Component, pro rata, until their
                                            Class Certificate Balance and
                                            Component Balance, respectively, are
                                            reduced to zero;

                  (iv) [reserved];

         (2) On each Distribution Date, the Trustee shall withdraw the Available
Funds for Loan Group 2 from the Distribution Account and apply such funds to
distributions on the Group 2 Senior Certificates in the following priority, in
each case, to the extent of Available Funds remaining:

                  (i) concurrently, to each interest-bearing Class or Component
         of Group 2 Senior Certificates, an amount allocable to interest equal
         to the related Class Optimal Interest Distribution Amount, any
         shortfall being allocated among such Classes in proportion to the
         amount of the Class Optimal Interest Distribution Amount that would
         have been distributed in the absence of such shortfall; provided, that
         for so long as the Swap Contract is in effect and thereafter to the
         extent a Swap Termination Payment is due to the Swap Counterparty other
         than as a result of a Swap Counterparty Trigger Event, the Class
         Optimal Interest Distribution Amount for the Class A-1-2 Component
         shall be distributed to the Swap Account; provided further, that after
         the Swap Contract Termination Date, any portion of the Excess Interest
         attributable to the Class A-1-2 Component shall be distributed pursuant
         to Section 4.02(g);

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                  (ii) [reserved];

                  (iii) concurrently, to each Class of Group 2 Senior
         Certificates as follows:

                           (A)      [reserved];

                           (B)      concurrently, to the Class 2-A-2
                                    Certificates and the Class A-1-2 Component,
                                    pro rata, until their Class Certificate
                                    Balance and Component Balance, respectively,
                                    are reduced to zero;

         (3) On each Distribution Date, the Trustee shall withdraw the Available
Funds for Loan Group 3 from the Distribution Account and apply such funds to
distributions on the Group 3 Senior Certificates in the following priority, in
each case, to the extent of Available Funds remaining:

                  (i) concurrently, to each interest-bearing Class or Component
         of Group 3 Senior Certificates, an amount allocable to interest equal
         to the related Class Optimal Interest Distribution Amount, any
         shortfall being allocated among such Classes in proportion to the
         amount of the Class Optimal Interest Distribution Amount that would
         have been distributed in the absence of such shortfall; provided, that
         for so long as the Swap Contract is in effect and thereafter to the
         extent a Swap Termination Payment is due to the Swap Counterparty other
         than as a result of a Swap Counterparty Trigger Event, the Class
         Optimal Interest Distribution Amount for the Class A-1-3 Component
         shall be distributed to the Swap Account; provided further, that after
         the Swap Contract Termination Date, any portion of the Excess Interest
         attributable to the Class A-1-3 Component shall be distributed pursuant
         to Section 4.02(g);

                  (ii) [reserved];

                  (iii) concurrently, to each Class of Group 3 Senior
         Certificates as follows:

                           (A)      [reserved];

                           (B)      concurrently, to the Class 3-A-2
                                    Certificates and the Class A-1-3 Component,
                                    pro rata, until their Class Certificate
                                    Balance and Component Balance, respectively,
                                    are reduced to zero;

         (4) On each Distribution Date, after making the distributions described
in Section 4.02(a)(1), Section 4.02(a)(2) and Section 4.02(a)(3), Available
Funds from each Loan Group remaining will be distributed to the Senior
Certificates to the extent provided in Section 4.03;

         (5) On each Distribution Date, Available Funds from each Loan Group
remaining after making the distributions described in Section 4.02(a)(1),
Section 4.02(a)(2), Section 4.02(a)(3) and Section 4.02(a)(4) will be
distributed to the Subordinated Certificates, subject to paragraph 4.02(e)
below, in the following order of priority:

                           (A)     to the Class B-1 Certificates, an amount
                                   allocable to interest equal to the Class
                                   Optimal Interest Distribution Amount for such
                                   Class for such Distribution Date;

                           (B)      to the Class B-1 Certificates, an amount
                                    allocable to principal equal to its Pro Rata
                                    Share for such Distribution Date until the
                                    Class Certificate Balance thereof is reduced
                                    to zero;

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<PAGE>

                           (C)      to the Class B-2 Certificates, an amount
                                    allocable to interest equal to the Class
                                    Optimal Interest Distribution Amount for
                                    such Class for such Distribution Date;

                           (D)      to the Class B-2 Certificates, an amount
                                    allocable to principal equal to its Pro Rata
                                    Share for such Distribution Date until the
                                    Class Certificate Balance thereof is reduced
                                    to zero;

                           (E)      to the Class B-3 Certificates, an amount
                                    allocable to interest equal to the Class
                                    Optimal Interest Distribution Amount for
                                    such Class for such Distribution Date;

                           (F)      to the Class B-3 Certificates, an amount
                                    allocable to principal equal to its Pro Rata
                                    Share for such Distribution Date until the
                                    Class Certificate Balance thereof is reduced
                                    to zero;

                           (G)      to the Class B-4 Certificates, an amount
                                    allocable to interest equal to the Class
                                    Optimal Interest Distribution Amount for
                                    such Class for such Distribution Date;

                           (H)      to the Class B-4 Certificates, an amount
                                    allocable to principal equal to its Pro Rata
                                    Share for such Distribution Date until the
                                    Class Certificate Balance thereof is reduced
                                    to zero;

                           (I)      to the Class B-5 Certificates, an amount
                                    allocable to interest equal to the Class
                                    Optimal Interest Distribution Amount for
                                    such Class for such Distribution Date;

                           (J)      to the Class B-5 Certificates, an amount
                                    allocable to principal equal to its Pro Rata
                                    Share for such Distribution Date until the
                                    Class Certificate Balance thereof is reduced
                                    to zero;

                           (K)      to the Class B-6 Certificates, an amount
                                    allocable to interest equal to the Class
                                    Optimal Interest Distribution Amount for
                                    such Class for such Distribution Date; and

                           (L)      to the Class B-6 Certificates, an amount
                                    allocable to principal equal to its Pro Rata
                                    Share for such Distribution Date until the
                                    Class Certificate Balance thereof is reduced
                                    to zero;

         (6) to the Swap Account, any Swap Termination Payment due to the Swap
Counterparty as the result of a Swap Counterparty Trigger Event; and

         (7) to the Class A-R Certificates, any remaining funds; provided, that
such amounts shall not include the $200 held in trust for the Class P-1 and
Class P-2 Certificates.

         On each Distribution Date, all amounts representing Hard Prepayment
Charges and Soft Prepayment Charges received during the related Prepayment
Period (and amounts paid by the Servicer for waiving them) will be distributed
to the Holders of the Class P-1 and Class P-2 Certificates, respectively. On the
Distribution Date immediately following the expiration of the latest Prepayment
Charge Period of the Mortgage Loans, the $200 held in trust for the Class P
Certificates will be distributed $100 to the

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Class P-1 Certificates and $100 to the Class P-2 Certificates. On each
Distribution Date, all amounts representing Late Payment Fees assessable during
the related Prepayment Period (and amounts paid by the Servicer for waiving them
less any such amounts not deposited into the Distribution Account by the
preceding Distribution Account Deposit date plus any such amounts deposited into
the Distribution Account with respect to prior Prepayment Periods) will be
distributed to the Holders of the Class L Certificates.

         (b) [reserved].

         (c) On each Distribution Date on or prior to the Swap Contract
Termination Date, following the deposits to the Swap Account pursuant to Section
4.02(a)(1), Section 4.02(a)(2) and Section 4.02(a)(3) and the distributions
described under Section 4.02(a), the Supplemental Interest Trustee shall
distribute amounts on deposit in the Swap Account in the following amounts and
priority:

                  (i) to the Swap Counterparty, any Net Swap Payment payable to
         the Swap Counterparty with respect to such Distribution Date;

                  (ii) to the Swap Counterparty, any Swap Termination Payment
         payable to the Swap Counterparty with respect to such Distribution Date
         not due to a Swap Counterparty Trigger Event; and

                  (iii) to the Class of LIBOR Certificates, an amount allocable
         to interest equal to the Class Optimal Interest Distribution Amount for
         such Class for such Distribution Date (without reduction as provided in
         Section 4.02(d));

         (d) On each Distribution Date, the amount referred to in clause (i) of
the definition of Class Optimal Interest Distribution Amount for each Class of
Certificates for such Distribution Date shall be reduced by (i) the related
Class' pro rata share of Net Prepayment Interest Shortfalls based on (x) with
respect to a Class of Senior Certificates, the related Class Optimal Interest
Distribution Amount and (y) with respect to a Class of Subordinated Certificates
on and prior to the second Senior Termination Date, the related Assumed Interest
Amount for such Distribution Date or after the second Senior Termination Date,
the Class Optimal Interest Distribution Amount for such Distribution Date, in
each case in the absence of such Net Prepayment Interest Shortfalls and (ii) the
related Class' Allocable Share of (A) with respect to each Mortgage Loan in the
related Loan Group (or, after the Senior Credit Support Depletion Date, any
Mortgage Loan) that became a Special Hazard Mortgage Loan during the calendar
month preceding the month of such Distribution Date, the excess of one month's
interest at the Adjusted Net Mortgage Rate on the Stated Principal Balance of
such Mortgage Loan as of the Due Date in such month over the amount of
Liquidation Proceeds applied as interest on such Mortgage Loan with respect to
such month, (B) with respect to each Mortgage Loan that became subject to a
Bankruptcy Loss during the calendar month preceding the month of such
Distribution Date, the interest portion of the related Debt Service Reduction or
Deficient Valuation, (C) each Relief Act Reduction for the Mortgage Loans in the
related Loan Group (or, after the Senior Credit Support Depletion Date, any
Mortgage Loan) incurred during the calendar month preceding the month of such
Distribution Date and (D) with respect to each Mortgage Loan in the related Loan
Group (or, after the Senior Credit Support Depletion Date, any Mortgage Loan)
that became a Fraud Loan during the calendar month preceding the month of such
Distribution Date, the excess of one month's interest at the related Adjusted
Net Mortgage Rate on the Stated Principal Balance of such Mortgage Loan as of
the Due Date in such month over the amount of Liquidation Proceeds applied as
interest on such Mortgage Loan with respect to such month.

         (e) Notwithstanding the priority and allocation contained in Section
4.02(a)(5), if, with respect to any Class of Subordinated Certificates, on any
Distribution Date the sum of the related Class

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Subordination Percentages of such Class and of all Classes of Subordinated
Certificates that have a higher numerical Class designation than such Class (the
"Applicable Credit Support Percentage") is less than the Original Applicable
Credit Support Percentage for such Class, no distribution of Principal
Prepayments on the Mortgage Loans will be made to any such Classes (the
"Restricted Classes") and the amount of such Principal Prepayments otherwise
distributable to the Restricted Classes shall be distributed to the Classes of
Subordinated Certificates having lower numerical Class designations than such
Class, pro rata, based on their respective Class Certificate Balances
immediately prior to such Distribution Date and shall be distributed in the
sequential order set forth in Section 4.02(a)(5). Notwithstanding the foregoing,
the Class of Subordinated Certificates then outstanding with the lowest
numerical class designation shall not be a Restricted Class.

         (f) If the amount of a Realized Loss on a Mortgage Loan in a Loan Group
has been reduced by application of Subsequent Recoveries with respect to such
Mortgage Loan, the amount of such Subsequent Recoveries will be applied
sequentially, in the order of payment priority, to increase the Class
Certificate Balance of each related Class of Certificates to which Realized
Losses have been allocated, but in each case by not more than the amount of
Realized Losses previously allocated to that Class of Certificates pursuant to
Section 4.05. Holders of such Certificates will not be entitled to any payment
in respect of the Class Optimal Interest Distribution Amount on the amount of
such increases for any Interest Accrual Period preceding the Distribution Date
on which such increase occurs. Any such increases shall be applied to the
Certificate Balance of each Certificate of such Class in accordance with its
respective Percentage Interest.

         (g) On any Distribution Date on which the Swap Contract is not in
effect, any Excess Interest shall be distributed by the Trustee to Deutsche Bank
Securities Inc., or its successors and assigns, on the related Distribution
Date.

         Section 4.03 Cross-Collateralization; Adjustments to Available Funds

         (a) On each Distribution Date prior to the earlier of the Senior Credit
Support Depletion Date and the second Senior Termination Date, but after a
Senior Termination Date, the Trustee shall distribute the principal portion of
Available Funds on the Mortgage Loans relating to such Senior Certificates that
will have been paid in full, to the holders of the Senior Certificates of the
other Certificate Groups, pro rata, based on their Class Certificate Balances,
provided, however, that the Trustee shall not make such distribution on such
Distribution Date if (a) the Aggregate Subordinated Percentage for such
Distribution Date is greater than or equal to 200% of such Aggregate
Subordinated Percentage as of the Closing Date and (b) the average Stated
Principal Balance of the Mortgage Loans in each Loan Group delinquent 60 days or
more over the last six months, as a percentage of the aggregate Class
Certificate Balance of the Subordinated Certificates, is less than 50%.

         (b) If on any Distribution Date the Class Certificate Balance and
Component Balance of the Senior Certificates and Component in a Loan Group is
greater than the aggregate Stated Principal Balance of the Mortgage Loans in
such Loan Group (each, an "Undercollateralized Group"), then the Trustee shall
reduce the Available Funds of the other Loan Group(s) that are not
undercollateralized (each, an "Overcollateralized Group"), as follows:

                  (i) to add to the Available Funds of the Undercollateralized
         Group an amount equal to the lesser of (a) one month's interest on the
         Transfer Payment Received of the Undercollateralized Group at the
         Weighted Average Adjusted Net Mortgage Rate applicable to the
         Undercollateralized Group and (b) Available Funds of the
         Overcollateralized Group(s) remaining after making distributions to the
         Certificates of the Overcollateralized Group(s) on such Distribution
         Date pursuant to Section 4.02; and

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                  (ii) to the Senior Certificates and Component of the
         Undercollateralized Group, to the extent of the principal portion of
         Available Funds of the Overcollateralized Group(s) remaining after
         making distributions to the Senior Certificates of the
         Overcollateralized Group(s) on such Distribution Date pursuant to
         Section 4.02, until the Class Certificate Balance of the Senior
         Certificates and Component of such Undercollateralized Group equals the
         aggregate Stated Principal Balance of the Mortgage Loans in the related
         Loan Group.

              The portion of the payment received by the Undercollateralized
Group allocable to principal is referred to as a "Transfer Payment Received."
The portion of the payment made by the Overcollateralized Group allocable to
principal is referred to as a "Transfer Payment Made."

              If more than one Overcollateralized Group exists on any
Distribution Date, reductions in the Available Funds of such Overcollateralized
Groups to make payments required to be made pursuant to this Section 4.03 on
such Distribution Date shall be made pro rata, based on the amount of remaining
Available Funds for each such Overcollateralized Group. If more than one
Undercollateralized Group exists on any Distribution Date, the payments required
to be made pursuant to this Section 4.03 on such Distribution Date shall be made
pro rata, based on the amount of payments to be made to the Undercollateralized
Groups.

         Section 4.04 [Reserved].

         Section 4.05 Allocation of Realized Losses.

         (a) On each Distribution Date, the Trustee shall allocate, based on
information received from the Servicer, the total amount of Realized Losses with
respect to each related Distribution Date.

         Realized Losses with respect to any Distribution Date shall be
allocated as follows:

                 (i) [reserved]; and

                 (A) any Realized Loss on the Mortgage Loans in a Loan Group
         shall be allocated first to the Subordinated Certificates in reverse
         order of their respective numerical Class designations (beginning with
         the Class of Subordinated Certificates then outstanding with the
         highest numerical Class designation) until the respective Class
         Certificate Balance of each such Class is reduced to zero, and second
         to the Classes of Senior Certificates of the related Senior Certificate
         Group (other than the Notional Amount Certificates) as follows: (1) any
         Realized Losses on the Group 1 Mortgage Loans will be allocated,
         sequentially, to the Class 1-A-2 Certificates and the Class A-1-1
         Component, in that order, until their respective Class Certificate
         Balance and Component Balance are reduced to zero; (2) any Realized
         Losses on the Group 2 Mortgage Loans will be allocated, sequentially,
         to the Class 2-A-2 Certificates and the Class A-1-2 Component, in that
         order, until their respective Class Certificate Balance and Component
         Balance are reduced to zero; and (3) any Realized Losses on the Group 3
         Mortgage Loans will be allocated sequentially, to the Class 3-A-1
         Certificates and Class A-1-3 Component, in that order, until their
         respective Class Certificate Balance and Component Balance are reduced
         to zero.

                 (B) [reserved].

         (b) The Class Certificate Balance of the Class of Subordinated
Certificates then outstanding with the highest numerical Class designation shall
be reduced on each Distribution Date by the amount, if any, by which the
aggregate Class Certificate Balance of all outstanding Classes of Certificates
(after giving effect to the distribution of principal and the allocation of
Realized Losses on such Distribution Date)

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exceeds the aggregate Stated Principal Balance of the Mortgage Loans as of the
Due Date in the month of such Distribution Date (after giving effect to
Principal Prepayments in the Prepayment Period related to such Due Date).

         (c) Any Realized Loss allocated to a Class of Certificates or any
reduction in the Class Certificate Balance or Component Balance of a Class of
Certificates pursuant to Section 4.05(a) or (b) shall be allocated among the
Certificates of such Class in proportion to their respective Certificate
Balances or Component Balances.

         (d) Any allocation of Realized Losses to a Certificate or any reduction
in the Certificate Balance or Component Balance of a Certificate pursuant to
Section 4.05(a) or (b) shall be accomplished by reducing the Certificate Balance
or Component Balance thereof immediately following the distributions made on the
related Distribution Date in accordance with the definition of Certificate
Balance.

         Section 4.06 Monthly Statements to Certificateholders.

         (a) Not later than each Distribution Date, the Trustee shall prepare
and make available on its website at https:// tss.sfs.db.com/investpublic to
each Certificateholder, the Servicer and the Depositor a statement for the
related distribution of:

                  (i) the applicable Record Dates, Interest Accrual Periods and
         Determination Dates for calculating distributions for the Distribution
         Date;

                  (ii) the amount of funds received from the Servicer for the
         Distribution Date separately identifying amounts received in respect of
         the Mortgage Loans and the amount of Advances included in the
         distribution on the Distribution Date;

                  (iii) the Servicing Fee and the amounts of any additional
         servicing compensation received by the Servicer attributable to
         penalties, fees, Excess Proceeds or other similar charges or fees and
         items with respect to the Distribution Date, and, with respect to
         Lender PMI Loans, the interest premium charged the related borrower for
         primary mortgage guaranty insurance;

                  (iv) the Trustee Fee for the Distribution Date;

                  (v) the aggregate amount of expenses paid from amounts on
         deposit in (x) the Certificate Account and (y) the Distribution
         Account;

                  (vi) the aggregate amount on deposit in the Distribution
         Account, as of the beginning and end of the related Due Period;

                  (vii) the amount of the distribution allocable to principal,
         separately identifying the aggregate amount of any Principal
         Prepayments and Liquidation Proceeds included therein;

                  (viii) the amount of the distribution allocable to interest,
         any Class Unpaid Interest Amounts included in the distribution and any
         remaining Class Unpaid Interest Amounts after giving effect to the
         distribution;

                  (ix) if the distribution to the Holders of any Class of
         Certificates is less than the full amount that would be distributable
         to them if sufficient funds were available, the amount of the shortfall
         and the allocation of the shortfall between principal and interest;

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                  (x) the aggregate amount of Realized Losses in each Loan Group
         and in the aggregate incurred and Subsequent Recoveries, if any,
         received during the preceding calendar month and aggregate Realized
         Losses through the Distribution Date;

                  (xi) the Class Certificate Balance of each Class of
         Certificates before and after giving effect to the distribution of
         principal on the Distribution Date;

                  (xii) the Pass-Through Rate for each Class of Certificates
         with respect to the Distribution Date;

                  (xiii) the number of Mortgage Loans in each Loan Group and in
         the aggregate and the aggregate Stated Principal Balance of the
         Mortgage Loans in each Loan Group and the Pool Stated Principal Balance
         as the first day of the related Due Period and the last day of the
         related Due Period;

                  (xiv) as of the last day of the related Due Period:

                  (A)      the weighted average Mortgage Rate of the Mortgage
                           Loans in each Loan Group and in the aggregate, and

                  (B)      the weighted average remaining term to maturity of
                           the Mortgage Loans in each Loan Group and in the
                           aggregate;

                  (xv) the number and aggregate outstanding Stated Principal
         Balance of the Mortgage Loans in each Loan Group and in the aggregate
         as of the end of the preceding calendar month:

                  (A)      delinquent (exclusive of Mortgage Loans in
                           foreclosure) (1) 30 to 59 days, (2) 60 to 89 days and
                           (3) 90 or more days,

                  (B)      in foreclosure and delinquent (1) 30 to 59 days, (2)
                           60 to 89 days and (3) 90 or more days and

                  (C)      that were the subject of a Loan Modification during
                           the preceding 12-month period,

         in each case as of the close of business on the last day of the
calendar month preceding the Distribution Date;

                  (xvi) for each of the preceding 12 calendar months, or all
         calendar months since the Cut-off Date, whichever is less, the
         aggregate dollar amount of the Scheduled Payments (A) due on all
         Outstanding Mortgage Loans on the Due Date in each such month and (B)
         delinquent sixty (60) days or more on the Due Date in each such month;

                  (xvii) with respect to any Mortgage Loan that became an REO
         Property during the preceding calendar month, the loan number and
         Stated Principal Balance of the Mortgage Loan as of the close of
         business on the Determination Date preceding the Distribution Date;

                  (xviii) the total number and principal balance of any REO
         Properties in each Loan Group and in the aggregate (and market value,
         if available) as of the close of business on the Determination Date
         preceding the Distribution Date;

                  (xix) the aggregate amount of Principal Prepayments received
         during the related Prepayment Period and the number of Mortgage Loans
         subject to such Principal Prepayments;

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                  (xx) the amount of Advances included in the distribution on
         the Determination Date and the aggregate amount of Advances outstanding
         as of the close of business on the Determination Date;

                  (xxi) the aggregate amount of Advances reimbursed during the
         related Due Period, the general source of funds for such reimbursements
         and the aggregate amount of Advances outstanding as of the close of
         business on the Determination Date;

                  (xxii) the aggregate amount of Servicing Advances reimbursed
         during the related Due Period, the general source of funds for such
         reimbursements and the aggregate amount of Servicing Advances
         outstanding as of the close of business on the Determination Date;

                  (xxiii) the aggregate number and outstanding Stated Principal
         Balance of Mortgage Loans in each Loan Group and in the aggregate
         repurchased during the related Due Period due to material breaches of
         representations and warranties regarding such Mortgage Loans;

                  (xxiv) each Senior Prepayment Percentage and Subordinated
         Prepayment Percentage for the Distribution Date;

                  (xxv) each Senior Percentage and Subordinated Percentage for
         the Distribution Date;

                  (xxvi) [reserved];

                  (xxvii) Amounts due and received under the Swap Contract for
         the Distribution Date;

                  (xxviii) Hard Prepayment Charges, Soft Prepayment Charges and
         Late Payment Fees collected, waived, and paid by the Servicer;

                  (xxix) the aggregate Stated Principal Balance of the Mortgage
         Loans in each Loan Group and in the aggregate that became Liquidated
         Mortgage Loans in the prior month and since the Cut-off Date (in each
         case immediately prior to the Stated Principal Balance being reduced to
         zero);

                  (xxx) the Stated Principal Balance of any Mortgage Loan that
         has been repurchased by the Servicer in accordance with Section 2.02,
         2.03 or 3.12; and

                  (xxxi) the Stated Principal Balance of any Substitute Mortgage
         Loan provided by the Seller and the Stated Principal Balance of any
         Mortgage Loan that has been replaced by a Substitute Mortgage Loan in
         accordance with Section 2.03.

         (b) The Trustee's responsibility for disbursing the above information
to the Certificateholders is limited to the availability, timeliness and
accuracy of the information derived from the Servicer.

         (c) By the Reporting Date, the Servicer shall provide to the Trustee in
electronic form the information needed to determine the distributions to be made
pursuant to Section 4.02 and any other information on which the Servicer and the
Trustee mutually agree.

         (d) On or before the fifth Business Day following the end of each
Prepayment Period (but in no event later than the third Business Day prior to
the related Distribution Date), the Servicer shall deliver to the Trustee (which
delivery may be by electronic data transmission) a report in substantially the
form set forth as Schedule V.

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         (e) Within a reasonable period of time after the end of each calendar
year, the Trustee shall cause to be furnished to each Person who at any time
during the calendar year was a Certificateholder, a statement containing the
information set forth in clauses (a)(vii) and (a)(viii) of this Section 4.06
aggregated for such calendar year or applicable portion thereof during which
such Person was a Certificateholder. Such obligation of the Trustee shall be
deemed to have been satisfied to the extent that substantially comparable
information shall be provided by the Trustee pursuant to any requirements of the
Code as from time to time in effect.

         Section 4.07 Determination of Pass-Through Rates for LIBOR
Certificates.

         On each LIBOR Determination Date so long as the LIBOR Certificates are
outstanding, the Trustee will determine LIBOR on the basis of the British
Bankers' Association ("BBA") "Interest Settlement Rate" for one-month deposits
in U.S. dollars as found on Reuters Page LIBOR01 as of 11:00 a.m. London time on
each LIBOR Determination Date.

         (a) If LIBOR cannot be determined as provided in the first paragraph of
this Section 4.07, the Trustee shall either (i) request each Reference Bank to
inform the Trustee of the quotation offered by its principal London office for
making one-month United States dollar deposits in leading banks in the London
interbank market, as of 11:00 a.m. (London time) on such LIBOR Determination
Date or (ii) in lieu of making any such request, rely on such Reference Bank
quotations that appear at such time on the Reuters Page LIBOR01(as defined in
the International Swap Dealers Association Inc. Code of Standard Wording,
Assumptions and Provisions for Swaps, 1986 Edition), to the extent available.

         (b) LIBOR for the next Interest Accrual Period for the LIBOR
Certificates will be established by the Trustee on each LIBOR Determination Date
as follows:

                  (i) If on any LIBOR Determination Date two or more Reference
         Banks provide such offered quotations, LIBOR for the next Interest
         Accrual Period for the LIBOR Certificates shall be the arithmetic mean
         of such offered quotations (rounding such arithmetic mean upwards if
         necessary to the nearest whole multiple of 1/32%).

                  (ii) If on any LIBOR Determination Date only one or none of
         the Reference Banks provides such offered quotations, LIBOR for the
         next Interest Accrual Period for the LIBOR Certificates shall be
         whichever is the higher of (i) LIBOR as determined on the previous
         LIBOR Determination Date or (ii) the Reserve Interest Rate. The
         "Reserve Interest Rate" shall be the rate per annum which the Trustee
         determines to be either (i) the arithmetic mean (rounded upwards if
         necessary to the nearest whole multiple of 1/32%) of the one-month
         United States dollar lending rates that New York City banks selected by
         the Trustee are quoting, on the relevant LIBOR Determination Date, to
         the principal London offices of at least two of the Reference Banks to
         which such quotations are, in the opinion of the Trustee, being so
         made, or (ii) in the event that the Trustee can determine no such
         arithmetic mean, the lowest one-month United States dollar lending rate
         which New York City banks selected by the Trustee are quoting on such
         LIBOR Determination Date to leading European banks.

                  (iii) If on any LIBOR Determination Date the Trustee is
         required but is unable to determine the Reserve Interest Rate in the
         manner provided in paragraph (b) above, LIBOR shall be LIBOR as
         determined on the preceding LIBOR Determination Date, or, in the case
         of the first LIBOR Determination Date, the Initial LIBOR Rate.

         (c) Until all of the LIBOR Certificates are paid in full, the Trustee
will at all times retain at least four Reference Banks for the purpose of
determining LIBOR with respect to each LIBOR Determination

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Date. The Servicer initially shall designate the Reference Banks. Each
"Reference Bank" shall be a leading bank engaged in transactions in Eurodollar
deposits in the international Eurocurrency market, shall not control, be
controlled by, or be under common control with, the Trustee and shall have an
established place of business in London. If any such Reference Bank should be
unwilling or unable to act as such or if the Servicer should terminate its
appointment as Reference Bank, the Trustee shall promptly appoint or cause to be
appointed another Reference Bank. The Trustee shall have no liability or
responsibility to any Person for (i) the selection of any Reference Bank for
purposes of determining LIBOR or (ii) any inability to retain at least four
Reference Banks which is caused by circumstances beyond its reasonable control.

         (d) The Pass-Through Rate for the LIBOR Certificates for each related
Interest Accrual Period shall be determined by the Trustee on each LIBOR
Determination Date so long as the LIBOR Certificates are outstanding on the
basis of LIBOR and the respective formulae appearing in footnotes corresponding
to the LIBOR Certificates in the table relating to the Certificates in the
Preliminary Statement.

         (e) In determining LIBOR, the Pass-Through Rate for the LIBOR
Certificates, any Interest Settlement Rate, or any Reserve Interest Rate, the
Trustee may conclusively rely and shall be protected in relying upon the offered
quotations (whether written, oral or on the Dow Jones Markets) from the BBA
designated banks, the Reference Banks or the New York City banks as to LIBOR,
the Interest Settlement Rate or the Reserve Interest Rate, as appropriate, in
effect from time to time. The Trustee shall not have any liability or
responsibility to any Person for (i) the Trustee's selection of New York City
banks for purposes of determining any Reserve Interest Rate or (ii) its
inability, following a good-faith reasonable effort, to obtain such quotations
from, the BBA designated banks, the Reference Banks or the New York City banks
or to determine such arithmetic mean, all as provided for in this Section 4.07.

         (f) The establishment of LIBOR and the Pass-Through Rate for the LIBOR
Certificates by the Trustee shall (in the absence of manifest error) be final,
conclusive and binding upon each Holder of a Certificate and the Trustee.

         (g) The Pass-Through Rate for the Interest Accrual Period for the first
Distribution Date for the LIBOR Certificates is set forth in the applicable
footnote under the heading "Master REMIC" in the Preliminary Statement.

         Section 4.08 Supplemental Interest Trust.

         (a) On the Closing Date, there is hereby established a separate trust
(the "Supplemental Interest Trust"), the assets of which shall consist of the
Supplemental Interest Trustee's rights and obligations under the Swap Contract
and that will be treated as a "grantor trust" for federal income tax purposes.
The Supplemental Interest Trust shall be maintained by the Supplemental Interest
Trustee.

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                                  ARTICLE FIVE

                                THE CERTIFICATES

         Section 5.01 The Certificates.

         The Certificates shall be substantially in the forms attached hereto as
exhibits. The Certificates shall be issuable in registered form, in the minimum
denominations and aggregate denominations per Class set forth in the Preliminary
Statement. The Certificates shall be issuable (x) in the case of the Class B-4,
Class B-5 and Class B-6 Certificates, in integral multiples of $1,000 in excess
of their respective minimum denominations and (y) in the case of each other
Class of Subordinated Certificates and the Senior Certificates (other than the
Class A-R Certificates), in integral multiples of $1 in excess of its minimum
denomination, except that one Certificate in each Class may be issued in a
different amount which must exceed the applicable minimum denomination.

         Subject to Section 9.02 respecting the final distribution on the
Certificates, on each Distribution Date the Trustee shall make distributions to
each Certificateholder of record on the preceding Record Date either (x) by wire
transfer in immediately available funds to the account of such holder at a bank
or other entity having appropriate facilities therefor, if such Holder has so
notified the Trustee at least five Business Days before the related Record Date
or (y) by check mailed by first class mail to such Certificateholder at the
address of such holder appearing in the Certificate Register.

         The Trustee shall execute the Certificates by the manual or facsimile
signature of an authorized officer. Certificates bearing the manual or facsimile
signatures of individuals who were, at the time such signatures were affixed,
authorized to sign on behalf of the Trustee shall bind the Trustee,
notwithstanding that such individuals or any of them have ceased to be so
authorized before the countersignature and delivery of any such Certificates or
did not hold such offices at the date of such Certificate. No Certificate shall
be entitled to any benefit under this Agreement, or be valid for any purpose,
unless countersigned by the Trustee by manual signature, and such
countersignature upon any Certificate shall be conclusive evidence, and the only
evidence, that such Certificate has been duly executed and delivered hereunder.
All Certificates shall be dated the date of their countersignature. On the
Closing Date, the Trustee shall countersign the Certificates to be issued at the
direction of the Depositor, or any affiliate thereof.

         The Depositor shall provide the Trustee, on a continuous basis with an
adequate inventory of Certificates to facilitate transfers.

         Section 5.02 Certificate Register; Registration of Transfer and
Exchange of Certificates.

         (a) The Trustee shall maintain, in accordance with Section 5.06, a
Certificate Register for the Trust Fund in which, subject to subsections (b) and
(c) below and to such reasonable regulations as it may prescribe, the Trustee
shall provide for the registration of Certificates and of transfers and
exchanges of Certificates as herein provided. Upon surrender for registration of
transfer of any Certificate, the Trustee shall execute and deliver, in the name
of the designated transferee or transferees, one or more new Certificates of the
same Class and aggregate Percentage Interest.

         At the option of a Certificateholder, Certificates may be exchanged for
other Certificates of the same Class in authorized denominations and evidencing
the same aggregate Percentage Interest upon surrender of the Certificates to be
exchanged at the office or agency of the Trustee. Whenever any Certificates are
so surrendered for exchange, the Trustee shall execute, authenticate, and
deliver the Certificates that the Certificateholder making the exchange is
entitled to receive. A written instrument of transfer in form satisfactory to
the Trustee duly executed by the holder of a Certificate or his attorney duly
authorized in writing shall accompany every Certificate presented or surrendered
for registration of transfer or exchange.

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         No service charge to the Certificateholders shall be made for any
registration of transfer or exchange of Certificates, but payment of a sum
sufficient to cover any tax or governmental charge that may be imposed in
connection with any transfer or exchange of Certificates may be required.

         All Certificates surrendered for registration of transfer or exchange
shall be cancelled and subsequently destroyed by the Trustee in accordance with
the Trustee's customary procedures.

         (b) No transfer of a Private Certificate shall be made unless such
transfer is made pursuant to an effective registration statement under the
Securities Act and any applicable state securities laws or is exempt from the
registration requirements under the Securities Act and such state securities
laws. If a transfer is to be made in reliance on an exemption from the
Securities Act and such state securities laws, to assure compliance with the
Securities Act and such state securities laws, the Certificateholder desiring to
effect such transfer and such Certificateholder's prospective transferee shall
each certify to the Trustee in writing the facts surrounding the transfer in
substantially the form set forth in Exhibit J (the "Transferor Certificate") and
deliver to the Trustee either (i) a letter in substantially the form of either
Exhibit K (the "Investment Letter") or Exhibit L (the "Rule 144A Letter") or
(ii) at the expense of the transferor, an Opinion of Counsel that the transfer
may be made without registration under the Securities Act. The Depositor shall
provide to any Holder of a Private Certificate and any prospective transferee
designated by that Holder, information regarding the related Certificates and
the Mortgage Loans and any other information necessary to satisfy the condition
to eligibility in Rule 144A(d)(4) for transfer of the Certificate without
registration thereof under the Securities Act pursuant to the registration
exemption provided by Rule 144A. The Trustee and the Servicer shall cooperate
with the Depositor in providing the Rule 144A information referenced in the
preceding sentence, including providing to the Depositor such information
regarding the Certificates, the Mortgage Loans, and other matters regarding the
Trust Fund as the Depositor reasonably requests to meet its obligation under the
preceding sentence. Each Holder of a Private Certificate desiring to effect a
transfer shall, and does hereby agree to, indemnify the Trustee, the Depositor,
the Seller, and the Servicer against any liability that may result if the
transfer is not so exempt or is not made in accordance with such federal and
state laws.

         No transfer of an ERISA-Restricted Certificate shall be made unless the
Trustee shall have received either (i) a representation from the transferee of
such Certificate acceptable to and in form and substance satisfactory to the
Trustee (if the Certificate is a Private Certificate, the requirement is
satisfied only by the Trustee's receipt of a representation letter from the
transferee substantially in the form of Exhibit K or Exhibit L, and if the
Certificate is a Residual Certificate, the requirement is satisfied only by the
Trustee's receipt of a representation letter from the transferee substantially
in the form of Exhibit I), to the effect that (x) the transferee is not an
employee benefit plan or arrangement subject to section 406 of ERISA or a plan
subject to section 4975 of the Code, or a person acting on behalf of any such
plan or arrangement or using the assets of any such plan or arrangement to
effect the transfer, or (y) if the ERISA-Restricted Certificate has been the
subject of an ERISA-Qualifying Underwriting, a representation that the
transferee is an insurance company that is purchasing such Certificate with
funds contained in an "insurance company general account" (as such term is
defined in Section V(e) of Prohibited Transaction Class Exemption 95-60 ("PTCE
95-60") and that the purchase and holding of such Certificate satisfies the
requirements for exemptive relief under Sections I and III of PTCE 95-60, or
(ii) in the case of any ERISA-Restricted Certificate presented for registration
in the name of an employee benefit plan subject to ERISA, or a plan or
arrangement subject to section 4975 of the Code (or comparable provisions of any
subsequent enactments), or a trustee of any such plan or any other person acting
on behalf of any such plan or arrangement or using such plan's or arrangement's
assets, an Opinion of Counsel satisfactory to the Trustee, which Opinion of
Counsel shall not be an expense of the Trustee, the Servicer or the Trust Fund,
addressed to the Trustee and the Servicer, to the effect that the purchase and
holding of such ERISA-Restricted Certificate will not result in a non-exempt
prohibited transaction under ERISA or section 4975 of the Code and will not
subject the Trustee or the Servicer to any

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obligation in addition to those expressly undertaken in this Agreement or to any
liability. For purposes of the preceding sentence, with respect to an
ERISA-Restricted Certificate that is not a Residual Certificate, if the
appropriate representation letter or Opinion of Counsel referred to in the
preceding sentence is not furnished, the representation in clause (i) above,
shall be deemed to have been made to the Trustee by the transferee's (including
an initial acquirer's) acceptance of the ERISA-Restricted Certificates. If the
representation is violated, or any attempt is made to transfer to a plan or
arrangement subject to section 406 of ERISA or a plan subject to section 4975 of
the Code, or a person acting on behalf of any such plan or arrangement or using
the assets of any such plan or arrangement, without the Opinion of Counsel
described above, the attempted transfer or acquisition shall be void.

         To the extent permitted under applicable law (including ERISA), the
Trustee shall be under no liability to any Person for any registration of
transfer of any ERISA-Restricted Certificate that is in fact not permitted by
this Section 5.02(b) or for making any payments due on such Certificate to the
Holder thereof or taking any other action with respect to such Holder under this
Agreement so long as the transfer was registered by the Trustee in accordance
with the foregoing requirements.

         So long as the Swap Contract is in effect, no transfer of a LIBOR
Certificate (other than a transfer of a LIBOR Certificate to an affiliate of the
Depositor (either directly or through a nominee) in connection with the initial
issuance of the Certificates) shall be made unless the Trustee shall have
received either (i) a representation from the transferee of such LIBOR
Certificate acceptable to and in form and substance satisfactory to the Trustee
to the effect that such transferee is not a Plan, or (ii) a representation that
the purchase and holding of the LIBOR Certificate satisfy the requirements for
exemptive relief under PTCE 84-14, PTCE 90-1, PTCE 91-38, PTCE 95-60, PTCE 96-23
or the service provider exemption provided by Section 408 (b)(17) of ERISA and
Section 4975 (d)(20) of the Code or a similar exemption. In the event that such
a representation letter is not delivered, one of the foregoing representations,
as appropriate, shall be deemed to have been made by the transferee's (including
an initial acquiror's) acceptance of the LIBOR Certificate. In the event that
such representation is violated, such transfer or acquisition shall be void and
of no effect.

         So long as the Swap Contract is in effect, no transfer of a LIBOR
Certificate shall be made unless the transferee of such Certificate has provided
to the Trustee a correct, complete and duly executed tax certification form
(i.e., U.S. Internal Revenue Service Form W-9, W-8BEN, W-8IMY, W-8EXP or W-8ECI,
as applicable (or any successor form thereto), together with appropriate
attachments) as a condition to such transfer and agrees to update such tax
certification form (i) upon expiration of any such tax certification form, (ii)
as required under then applicable U.S. Treasury regulations and (iii) promptly
upon learning that any tax certification form previously provided has become
obsolete or incorrect. Upon receipt of any such tax certification form from a
transferee of any LIBOR Certificate, the Trustee shall provide such tax
certification form to the Supplemental Interest Trustee. The Supplemental
Interest Trustee shall provide such tax certification form to the Swap
Counterparty. Each Holder of a LIBOR Certificate and each transferee thereof
shall be deemed to have consented to the Trustee and the Supplemental Interest
Trustee, as applicable, forwarding to the Swap Counterparty any such tax
certification form it has provided and updated in accordance with these transfer
restrictions. Any purported sales or transfers of any LIBOR Certificate to a
transferee that does not comply with these requirements shall be deemed null and
void under this Agreement.

         The Supplemental Interest Trustee and the Trustee shall not be liable
for the content or truthfulness of any such tax certification provided to it.
The Supplemental Interest Trustee and the Trustee shall only be required to
forward any tax certification received by it to the Swap Counterparty at the
last known address provided to it, and shall not be liable for the receipt of
such tax certification by the Swap Counterparty nor any failure of the Swap
Counterparty to process such certification or to take any action as required
under the Swap Contract or under applicable law. The Supplemental Interest
Trustee

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and the Trustee shall have no duty to take action to correct any misstatement or
omission in any tax certification provided to it and forwarded to the Swap
Counterparty.

         (c) Each Person who has or who acquires any Ownership Interest in a
Residual Certificate shall be deemed by the acceptance or acquisition of such
Ownership Interest to have agreed to be bound by the following provisions, and
the rights of each Person acquiring any Ownership Interest in a Residual
Certificate are expressly subject to the following provisions:

                  (i) Each Person holding or acquiring any Ownership Interest in
         a Residual Certificate shall be a Permitted Transferee and shall
         promptly notify the Trustee of any change or impending change in its
         status as a Permitted Transferee.

                  (ii) No Ownership Interest in a Residual Certificate may be
         registered on the Closing Date or thereafter transferred, and the
         Trustee shall not register the Transfer of any Residual Certificate
         unless, in addition to the certificates required to be delivered to the
         Trustee under subparagraph (b) above, the Trustee shall have been
         furnished with an affidavit (a "Transfer Affidavit") of the initial
         owner or the proposed transferee in the form of Exhibit I.

                  (iii) Each Person holding or acquiring any Ownership Interest
         in a Residual Certificate shall agree (A) to obtain a Transfer
         Affidavit from any other Person to whom such Person attempts to
         Transfer its Ownership Interest in a Residual Certificate, (B) to
         obtain a Transfer Affidavit from any Person for whom such Person is
         acting as nominee, trustee or agent in connection with any Transfer of
         a Residual Certificate and (C) not to Transfer its Ownership Interest
         in a Residual Certificate or to cause the Transfer of an Ownership
         Interest in a Residual Certificate to any other Person if it has actual
         knowledge that such Person is not a Permitted Transferee.

                  (iv) Any attempted or purported Transfer of any Ownership
         Interest in a Residual Certificate in violation of this Section 5.02(c)
         shall be absolutely null and void and shall vest no rights in the
         purported Transferee. If any purported transferee shall become a Holder
         of a Residual Certificate in violation of this Section 5.02(c), then
         the last preceding Permitted Transferee shall be restored to all rights
         as Holder thereof retroactive to the date of registration of Transfer
         of such Residual Certificate. The Trustee shall be under no liability
         to any Person for any registration of Transfer of a Residual
         Certificate that is in fact not permitted by Section 5.02(b) and this
         Section 5.02(c) or for making any payments due on such Certificate to
         the Holder thereof or taking any other action with respect to such
         Holder under this Agreement so long as the Transfer was registered
         after receipt of the related Transfer Affidavit, Transferor Certificate
         and either the Rule 144A Letter or the Investment Letter. The Trustee
         shall be entitled but not obligated to recover from any Holder of a
         Residual Certificate that was in fact not a Permitted Transferee at the
         time it became a Holder or, at such subsequent time as it became other
         than a Permitted Transferee, all payments made on such Residual
         Certificate at and after either such time. Any such payments so
         recovered by the Trustee shall be paid and delivered by the Trustee to
         the last preceding Permitted Transferee of such Certificate.

                  (v) The Depositor shall use its best efforts to make
         available, upon receipt of written request from the Trustee, all
         information necessary to compute any tax imposed under section 860E(e)
         of the Code as a result of a Transfer of an Ownership Interest in a
         Residual Certificate to any Holder who is not a Permitted Transferee.

         The restrictions on Transfers of a Residual Certificate set forth in
this Section 5.02(c) shall cease to apply (and the applicable portions of the
legend on a Residual Certificate may be deleted) with respect

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<PAGE>

to Transfers occurring after delivery to the Trustee of an Opinion of Counsel,
which Opinion of Counsel shall not be an expense of the Trust Fund, the Trustee,
the Seller or the Servicer, to the effect that the elimination of such
restrictions will not cause any REMIC created under this Agreement to fail to
qualify as a REMIC at any time that the Certificates are outstanding or result
in the imposition of any tax on the Trust Fund, a Certificateholder or another
Person. Each Person holding or acquiring any Ownership Interest in a Residual
Certificate hereby consents to any amendment of this Agreement which, based on
an Opinion of Counsel furnished to the Trustee, is reasonably necessary (a) to
ensure that the record ownership of, or any beneficial interest in, a Residual
Certificate is not transferred, directly or indirectly, to a Person that is not
a Permitted Transferee and (b) to provide for a means to compel the Transfer of
a Residual Certificate which is held by a Person that is not a Permitted
Transferee to a Holder that is a Permitted Transferee.

         (d) The preparation and delivery of all certificates and opinions
referred to above in this Section 5.02 in connection with transfer shall be at
the expense of the parties to such transfers.

         (e) Except as provided below, the Book-Entry Certificates shall at all
times remain registered in the name of the Depository or its nominee and at all
times: (i) registration of the Certificates may not be transferred by the
Trustee except to another Depository; (ii) the Depository shall maintain
book-entry records with respect to the Certificate Owners and with respect to
ownership and transfers of such Book-Entry Certificates; (iii) ownership and
transfers of registration of the Book-Entry Certificates on the books of the
Depository shall be governed by applicable rules established by the Depository;
(iv) the Depository may collect its usual and customary fees, charges and
expenses from its Depository Participants; (v) the Trustee shall deal with the
Depository, Depository Participants and Indirect Participants as representatives
of the Certificate Owners of the Book-Entry Certificates for purposes of
exercising the rights of holders under this Agreement, and requests and
directions for and votes of such representatives shall not be deemed to be
inconsistent if they are made with respect to different Certificate Owners; and
(vi) the Trustee may rely and shall be fully protected in relying upon
information furnished by the Depository with respect to its Depository
Participants and furnished by the Depository Participants with respect to
Indirect Participants and persons shown on the books of such Indirect
Participants as direct or indirect Certificate Owners.

         All transfers by Certificate Owners of Book-Entry Certificates shall be
made in accordance with the procedures established by the Depository Participant
or brokerage firm representing the Certificate Owner. Each Depository
Participant shall only transfer Book-Entry Certificates of Certificate Owners it
represents or of brokerage firms for which it acts as agent in accordance with
the Depository's normal procedures.

         If (x) (i) the Depository or the Depositor advises the Trustee in
writing that the Depository is no longer willing or able to properly discharge
its responsibilities as Depository, and (ii) the Trustee or the Depositor is
unable to locate a qualified successor or (y) after the occurrence of an Event
of Default, Certificate Owners representing at least 51% of the Certificate
Balance of the Book-Entry Certificates together advise the Trustee and the
Depository through the Depository Participants in writing that the continuation
of a book-entry system through the Depository is no longer in the best interests
of the Certificate Owners, the Trustee shall notify all Certificate Owners,
through the Depository, of the occurrence of any such event and of the
availability of definitive, fully-registered Certificates (the "Definitive
Certificates") to Certificate Owners requesting the same. Upon surrender to the
Trustee of the related Class of Certificates by the Depository, accompanied by
the instructions from the Depository for registration, the Trustee shall issue
the Definitive Certificates. None of the Servicer, the Depositor or the Trustee
shall be liable for any delay in delivery of such instruction and each may
conclusively rely on, and shall be protected in relying on, such instructions.
The Servicer shall provide the Trustee with an adequate inventory of
certificates to facilitate the issuance and transfer of Definitive Certificates.
Upon

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the issuance of Definitive Certificates all references herein to obligations
imposed upon or to be performed by the Depository shall be deemed to be imposed
upon and performed by the Trustee, to the extent applicable with respect to such
Definitive Certificates and the Trustee shall recognize the Holders of the
Definitive Certificates as Certificateholders hereunder; provided that the
Trustee shall not by virtue of its assumption of such obligations become liable
to any party for any act or failure to act of the Depository.

         Section 5.03 Mutilated, Destroyed, Lost or Stolen Certificates.

         If (a) any mutilated Certificate is surrendered to the Trustee, or (b)
the Trustee receives evidence to its satisfaction of the destruction, loss, or
theft of any Certificate and the Servicer and the Trustee receive the security
or indemnity required by them to hold each of them harmless, then, in the
absence of notice to the Trustee that the Certificate has been acquired by a
Protected Purchaser, and if the requirements of Section 8-406 of the UCC are met
and subject to Section 8-405 of the UCC, the Trustee shall execute, countersign,
and deliver, in exchange for or in lieu of any such mutilated, destroyed, lost,
or stolen Certificate, a new Certificate of like Class, tenor, and Percentage
Interest. In connection with the issuance of any new Certificate under this
Section 5.03, the Trustee may require the payment of a sum sufficient to cover
any tax or other governmental charge that may be imposed in relation thereto and
any other expenses (including the fees and expenses of the Trustee) connected
therewith. Any replacement Certificate issued pursuant to this Section 5.03
shall constitute complete and indefeasible evidence of ownership, as if
originally issued, whether or not the lost, stolen, or destroyed Certificate is
found at any time.

         Section 5.04 Persons Deemed Owners.

         The Servicer, the Trustee, and any agent of the Servicer or the Trustee
may treat the Person in whose name any Certificate is registered as the owner of
such Certificate for the purpose of receiving distributions as provided in this
Agreement and for all other purposes whatsoever, and none of the Servicer, the
Trustee or any agent of the Servicer or the Trustee shall be affected by any
notice to the contrary.

         Section 5.05 Access to List of Certificateholders' Names and Addresses.

         If three or more Certificateholders and/or Certificate Owners (a)
request such information in writing from the Trustee, (b) state that such
Certificateholders and/or Certificate Owners desire to communicate with other
Certificateholders and/or Certificate Owners with respect to their rights under
this Agreement or under the Certificates, and (c) provide a copy of the
communication which such Certificateholders and/or Certificate Owners propose to
transmit, or if the Depositor or Servicer shall request such information in
writing from the Trustee, then the Trustee shall, within ten Business Days after
the receipt of such request, provide the Depositor, the Servicer or such
Certificateholders and/or Certificate Owners at such recipients' expense the
most recent list of the Certificateholders of such Trust Fund held by the
Trustee. The Depositor and every Certificateholder and/or Certificate Owner, by
receiving and holding a Certificate, agree that the Trustee shall not be held
accountable because of the disclosure of any such information as to the list of
the Certificateholders hereunder, regardless of the source from which such
information was derived.

         Section 5.06 Maintenance of Office or Agency.

         The Certificate Registrar will maintain at its expense an office or
offices or agency or agencies in the United States located at Deutsche Bank
National Trust Company, c/o DB Services Tennessee, 648 Grassmere Park Rd.,
Nashville, TN 37211-3658, Attention: Transfer Unit, where Certificates may be

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surrendered for registration of transfer or exchange. The Certificate Registrar
will give prompt written notice to the Certificateholders and to the Trustee (if
other than the Certificate Registrar) of any change in such location of any such
office or agency.

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                                   ARTICLE SIX

                         THE DEPOSITOR AND THE SERVICER

         Section 6.01 Respective Liabilities of the Depositor and the Servicer.

         The Depositor and the Servicer shall each be liable in accordance with
this Agreement only to the extent of the obligations specifically and
respectively imposed upon and undertaken by them in this Agreement.

         Section 6.02 Merger or Consolidation of the Depositor or the Servicer.

         The Depositor and the Servicer will each keep in full effect their
existence and their rights and franchises as a corporation and a federal savings
bank, respectively, under the laws of the United States or under the laws of one
of the states thereof and will each obtain and preserve its qualification to do
business as a foreign corporation in each jurisdiction in which such
qualification is or shall be necessary to protect the validity and
enforceability of this Agreement, or any of the Mortgage Loans and to perform
its respective duties under this Agreement.

         Any Person into which the Depositor or the Servicer may be merged or
consolidated, or any Person resulting from any merger or consolidation to which
the Depositor or the Servicer shall be a party, or any person succeeding to the
business of the Depositor or the Servicer, shall be the successor of the
Depositor or the Servicer, as the case may be, hereunder, without the execution
or filing of any paper or any further act on the part of any of the parties
hereto, anything herein to the contrary notwithstanding; provided, however, that
the successor or surviving Person to the Servicer shall be qualified to sell
mortgage loans to, and to service mortgage loans on behalf of, FNMA or FHLMC.

         As a condition to the effectiveness of any merger or consolidation, at
least 15 calendar days prior to the effective date of any merger or
consolidation of the Servicer, the Servicer shall provide (x) written notice to
the Depositor of any successor pursuant to this Section and (y) in writing and
in form and substance reasonably satisfactory to the Depositor, all information
reasonably requested by the Depositor in order to comply with its reporting
obligation under Item 6.02 of Form 8-K with respect to a replacement Servicer.

         Section 6.03 Limitation on Liability of the Depositor, the Seller, the
Servicer, and Others.

         None of the Depositor, the Seller, the Servicer or any of the
directors, officers, employees or agents of the Depositor, the Seller or the
Servicer shall be under any liability to the Certificateholders for any action
taken or for refraining from the taking of any action in good faith pursuant to
this Agreement, or for errors in judgment; provided, however, that this
provision shall not protect the Depositor, the Seller, the Servicer or any such
Person against any breach of representations or warranties made by it herein or
protect the Depositor, the Seller, the Servicer or any such Person from any
liability which would otherwise be imposed by reasons of willful misfeasance,
bad faith or gross negligence in the performance of duties or because of
reckless disregard of obligations and duties hereunder. The Depositor, the
Seller, the Servicer, and any director, officer, employee or agent of the
Depositor, the Seller or the Servicer may rely in good faith on any document of
any kind prima facie properly executed and submitted by any Person respecting
any matters arising hereunder. The Depositor, the Seller, the Servicer, and any
director, officer, employee or agent of the Depositor, the Seller or the
Servicer shall be indemnified by the Trust Fund and held harmless against any
loss, liability or expense incurred in connection with any audit, controversy or
judicial proceeding relating to a governmental taxing authority or any legal
action relating to this Agreement or the Certificates, other than any loss,
liability or expense related to any specific

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<PAGE>

Mortgage Loan or Mortgage Loans (except as any such loss, liability or expense
shall be otherwise reimbursable pursuant to this Agreement) and any loss,
liability or expense incurred because of willful misfeasance, bad faith or gross
negligence in the performance of duties hereunder or because of reckless
disregard of obligations and duties hereunder. None of the Depositor, the Seller
or the Servicer shall be under any obligation to appear in, prosecute or defend
any legal action that is not incidental to its respective duties hereunder and
which in its opinion may involve it in any expense or liability; provided,
however, that any of the Depositor, the Seller or the Servicer may in its
discretion undertake any such action that it may deem appropriate in respect of
this Agreement and the rights and duties of the parties hereto and interests of
the Trustee and the Certificateholders hereunder. In such event, the legal
expenses and costs of such action and any liability resulting therefrom shall be
expenses, costs and liabilities of the Trust Fund, and the Depositor, the
Seller, and the Servicer shall be entitled to be reimbursed therefor out of the
Certificate Account.

         Section 6.04 Limitation on Resignation of the Servicer.

         The Servicer shall not resign from the obligations and duties hereby
imposed on it except (a) upon appointment of a successor servicer and receipt by
the Trustee of a letter from each Rating Agency that such a resignation and
appointment will not result in a downgrading, qualification or withdrawal of the
rating of any of the Certificates or (b) upon determination that its duties
under this Agreement are no longer permissible under applicable law. Any such
determination under clause (b) permitting the resignation of the Servicer shall
be evidenced by an Opinion of Counsel to such effect delivered to the Trustee.
No such resignation shall become effective until the Trustee or a successor
servicer shall have assumed the Servicer's responsibilities, duties, liabilities
and obligations under this Agreement and the Depositor shall have received the
information described in the following sentence. As a condition to the
effectiveness of any such resignation, at least 15 calendar days prior to the
effective date of such resignation, the Servicer shall provide (x) written
notice to the Depositor of any successor pursuant to this Section and (y) in
writing and in form and substance reasonably satisfactory to the Depositor, all
information reasonably requested by the Depositor in order to comply with its
reporting obligation under Item 6.02 of Form 8-K with respect to the resignation
of the Servicer.

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                                  ARTICLE SEVEN

                                     DEFAULT

         Section 7.01 Events of Default.

         "Event of Default," wherever used in this Agreement, means any one of
the following events:

         (a) any failure by the Servicer to deposit in the Certificate Account
or remit to the Trustee any payment required to be made by it under this
Agreement, which failure continues unremedied for five days after the date on
which written notice of the failure has been given to the Servicer by the
Trustee or the Depositor or to the Servicer and the Trustee by the Holders of
Certificates of any Class evidencing not less than 25% of the aggregate
Percentage Interests of the Class; or

         (b) any failure by the Servicer to observe or perform in any material
respect any other of the covenants or agreements on the part of the Servicer
contained in this Agreement (except with respect to a failure related to a
Limited Exchange Act Reporting Obligation), which failure materially affects the
rights of Certificateholders and continues unremedied for a period of 60 days
after the date on which written notice of such failure shall have been given to
the Servicer by the Trustee or the Depositor, or to the Servicer and the Trustee
by the Holders of Certificates of any Class evidencing not less than 25% of the
Percentage Interests of the Class; provided that the sixty-day cure period shall
not apply to the initial delivery of the Mortgage File for Delay Delivery
Mortgage Loans nor the failure to repurchase or substitute in lieu thereof; or

         (c) a decree or order of a court or agency or supervisory authority
having jurisdiction in the premises for the appointment of a receiver,
conservator or liquidator in any insolvency, readjustment of debt, marshalling
of assets and liabilities or similar proceedings, or for the winding-up or
liquidation of its affairs, shall have been entered against the Servicer and
such decree or order shall have remained in force undischarged or unstayed for a
period of 60 consecutive days; or

         (d) the Servicer shall consent to the appointment of a receiver,
conservator or liquidator in any insolvency, readjustment of debt, marshalling
of assets and liabilities or similar proceedings of or relating to the Servicer
or all or substantially all of the property of the Servicer; or

         (e) the Servicer shall admit in writing its inability to pay its debts
generally as they become due, file a petition to take advantage of, or commence
a voluntary case under, any applicable insolvency or reorganization statute,
make an assignment for the benefit of its creditors, or voluntarily suspend
payment of its obligations; or

         (f) the Servicer shall fail (i) to make an Advance on the Servicer
Advance Date or (ii) to reimburse in full the Trustee within two days of the
Servicer Advance Date for any Advance made by the Trustee pursuant to Section
4.01(b).

         If an Event of Default described in clauses (a) through (f) of this
Section 7.01 occurs, then, and in each and every such case, so long as such
Event of Default shall not have been remedied, the Trustee may, or at the
direction of the Holders of Certificates of any Class evidencing not less than
66 2/3% of the Percentage Interests of the Class, the Trustee shall by notice in
writing to the Servicer(with a copy to each Rating Agency), terminate all of the
rights and obligations of the Servicer under this Agreement and in the Mortgage
Loans and the proceeds thereof, other than its rights as a Certificateholder
hereunder. In addition, if during the period that the Depositor is required to
file Exchange Act Reports with respect to the Trust Fund, the Servicer shall
fail to observe or perform any of

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the obligations that constitute a Limited Exchange Act Reporting Obligation or
the obligations set forth in Section 3.17(a) or Section 11.07(a)(i) and (ii),
and such failure continues for the lesser of 10 calendar days or such period in
which the applicable Exchange Act Report can be filed timely (without taking
into account any extensions), so long as such failure shall not have been
remedied, the Trustee shall, but only at the direction of the Depositor,
terminate all of the rights and obligations of the Servicer under this Agreement
and in and to the Mortgage Loans and the proceeds thereof, other than its rights
as a Certificateholder hereunder. The Depositor shall not be entitled to
terminate the rights and obligations of the Servicer if a failure of the
Servicer to identify a Subcontractor "participating in the servicing function"
within the meaning of Item 1122 of Regulation AB was attributable solely to the
role or functions of such Subcontractor with respect to mortgage loans other
than the Mortgage Loans.

         On and after the receipt by the Servicer of such written notice, all
authority and power of the Servicer hereunder, whether with respect to the
Mortgage Loans or otherwise, shall pass to and be vested in the Trustee. The
Trustee shall make any Advance that the Servicer failed to make subject to
Section 3.05, whether or not the obligations of the Servicer have been
terminated pursuant to this Section. The Trustee is hereby authorized and
empowered to execute and deliver, on behalf of the Servicer, as attorney-in-fact
or otherwise, any documents and other instruments, and to do or accomplish all
other acts or things necessary or appropriate to effect the purposes of such
notice of termination, whether to complete the transfer and endorsement or
assignment of the Mortgage Loans and related documents, or otherwise. Unless
expressly provided in such written notice, no such termination shall affect any
obligation of the Servicer to pay amounts owed pursuant to Article VIII. The
Servicer agrees to cooperate with the Trustee in effecting the termination of
the Servicer's responsibilities and rights hereunder, including the transfer to
the Trustee of all cash amounts which shall at the time be credited to the
Certificate Account, or thereafter be received with respect to the Mortgage
Loans. If the Servicer fails to make any Advance required under Section 4.01 of
this Agreement, thereby triggering an Event of Default described in clause (f)
of this Section 7.01, the Trustee shall make such Advance on that Distribution
Date.

         Notwithstanding any termination of the activities of the Servicer under
this Agreement, the Servicer shall be entitled to receive, out of any late
collection of a Scheduled Payment on a Mortgage Loan which was due before the
notice terminating such Servicer's rights and obligations as Servicer hereunder
and received after such notice, that portion thereof to which such Servicer
would have been entitled pursuant to Sections 3.09(a)(i) through (viii), and any
other amounts payable to such Servicer hereunder the entitlement to which arose
before the termination of its activities hereunder.

         If the Servicer is terminated, the Trustee shall provide the Depositor
in writing and in form and substance reasonably satisfactory to the Depositor,
all information reasonably requested by the Depositor in order to comply with
its reporting obligation under Item 6.02 of Form 8-K with respect to a successor
servicer in the event the Trustee should succeed to the duties of the Servicer
as set forth herein.

         Section 7.02 Trustee to Act; Appointment of Successor.

         On and after the time the Servicer receives a notice of termination
pursuant to Section 7.01, the Trustee shall, subject to and to the extent
provided in Section 3.05, be the successor to the Servicer in its capacity as
servicer under this Agreement and the transactions set forth or provided for
herein and shall be subject to all the responsibilities, duties and liabilities
relating thereto placed on the Servicer by the terms hereof and applicable law
including the obligation to make Advances pursuant to Section 4.01. As
compensation therefor, the Trustee shall be entitled to all funds relating to
the Mortgage Loans that the Servicer would have been entitled to charge to the
Certificate Account or Distribution Account if the Servicer had continued to act
hereunder, including, if the Servicer was receiving the Servicing Fee, the
Servicing Fee. Notwithstanding the foregoing, if the Trustee has become the
successor to the Servicer in

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<PAGE>

accordance with Section 7.01, the Trustee may, if it shall be unwilling to so
act, or shall, if it is prohibited by applicable law from making Advances
pursuant to Section 4.01 or if it is otherwise unable to so act, appoint, or
petition a court of competent jurisdiction to appoint, any established mortgage
loan servicing institution the appointment of which does not adversely affect
the then current rating of the Certificates by each Rating Agency, as the
successor to the Servicer hereunder in the assumption of all or any part of the
responsibilities, duties or liabilities of the Servicer hereunder. Any successor
to the Servicer shall be an institution which is a FNMA and FHLMC approved
seller/servicer in good standing, which has a net worth of at least $15,000,000,
which is willing to service the Mortgage Loans and which executes and delivers
to the Depositor and the Trustee an agreement accepting such delegation and
assignment, containing an assumption by such Person of the rights, powers,
duties, responsibilities, obligations and liabilities of the Servicer (other
than liabilities of the Servicer under Section 6.03 incurred before termination
of the Servicer under Section 7.01), with like effect as if originally named as
a party to this Agreement; provided that each Rating Agency acknowledges that
its rating of the Certificates in effect immediately before such assignment and
delegation will not be qualified or reduced as a result of such assignment and
delegation. Pending appointment of a successor to the Servicer hereunder, the
Trustee shall act in such capacity as provided above, subject to section 3.03
and unless prohibited by law. In connection with such appointment and
assumption, the Trustee may make such arrangements for the compensation of such
successor out of payments on Mortgage Loans as it and such successor shall
agree; provided, however, that in no case shall the rate of such compensation
exceed the Servicing Fee Rate. The Trustee and such successor shall take such
action, consistent with this Agreement, as shall be necessary to effectuate any
such succession. Neither the Trustee nor any other successor servicer shall be
deemed to be in default hereunder because of any failure to make, or any delay
in making, any distribution hereunder or any portion thereof or any failure to
perform, or any delay in performing, any duties or responsibilities hereunder,
in either case caused by the failure of the Servicer to deliver or provide, or
any delay in delivering or providing, any cash, information, documents or
records to it.

         In connection with the termination or resignation of the Servicer
hereunder, either (i) the successor Servicer, including the Trustee if the
Trustee is acting as successor Servicer, shall represent and warrant that it is
a member of MERS in good standing and shall agree to comply in all material
respects with the rules and procedures of MERS in connection with the servicing
of the Mortgage Loans that are registered with MERS, or (ii) the predecessor
Servicer shall cooperate with the successor Servicer either (x) in causing MERS
to execute and deliver an assignment of Mortgage in recordable form to transfer
the Mortgage from MERS to the Trustee and to execute and deliver such other
notices, documents and other instruments as may be necessary or desirable to
effect a transfer of such Mortgage Loan or servicing of such Mortgage Loan on
the MERS(R) System to the successor Servicer or (y) in causing MERS to designate
on the MERS(R) System the successor Servicer as the servicer of such Mortgage
Loan. The predecessor Servicer shall file or cause to be filed any such
assignment in the appropriate recording office. The successor Servicer shall
cause such assignment to be delivered to the Trustee promptly upon receipt of
the original with evidence of recording thereon or a copy certified by the
public recording office in which such assignment was recorded.

         Any successor to the Servicer as servicer shall give notice to the
Mortgagors of such change of servicer and shall, during the term of its service
as servicer, maintain in force the policy or policies that the Servicer is
required to maintain pursuant to this Agreement.

         Section 7.03 Notification to Certificateholders.

         (a) Upon any termination of or appointment of a successor to the
Servicer, the Trustee shall give prompt written notice thereof to
Certificateholders and to each Rating Agency.

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         (b) Within 60 days after the occurrence of any Event of Default, the
Trustee shall transmit by mail to all Certificateholders and each Rating Agency
notice of each such Event of Default hereunder known to the Trustee, unless such
Event of Default shall have been cured or waived.

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                                  ARTICLE EIGHT

                             CONCERNING THE TRUSTEE

         Section 8.01 Duties of the Trustee.

         The Trustee, before the occurrence of an Event of Default and after the
curing of all Events of Default that may have occurred, shall undertake to
perform such duties and only such duties as are specifically set forth in this
Agreement. In case an Event of Default has occurred and remains uncured, the
Trustee shall exercise such of the rights and powers vested in it by this
Agreement, and use the same degree of care and skill in their exercise as a
prudent person would exercise or use under the circumstances in the conduct of
such person's own affairs.

         The Trustee, upon receipt of all resolutions, certificates, statements,
opinions, reports, documents, orders or other instruments furnished to the
Trustee that are specifically required to be furnished pursuant to any provision
of this Agreement shall examine them to determine whether they are in the form
required by this Agreement. The Trustee shall not be responsible for the
accuracy or content of any such resolution, certificate, statement, opinion,
report, document, order, or other instrument.

         No provision of this Agreement shall be construed to relieve the
Trustee from liability for its own negligent action, its own negligent failure
to act or its own willful misconduct; provided, however, that, unless an Event
of Default known to the Trustee has occurred and is continuing,

         (a) the duties and obligations of the Trustee shall be determined
solely by the express provisions of this Agreement, the Trustee shall not be
liable except for the performance of the duties and obligations specifically set
forth in this Agreement, no implied covenants or obligations shall be read into
this Agreement against the Trustee, and the Trustee may conclusively rely, as to
the truth of the statements and the correctness of the opinions expressed
therein, upon any certificates or opinions furnished to the Trustee and
conforming to the requirements of this Agreement which it believed in good faith
to be genuine and to have been duly executed by the proper authorities
respecting any matters arising hereunder;

         (b) the Trustee shall not be liable for an error of judgment made in
good faith by a Responsible Officer or Responsible Officers of the Trustee,
unless it is finally proven that the Trustee was negligent in ascertaining the
pertinent facts; and

         (c) the Trustee shall not be liable with respect to any action taken,
suffered, or omitted to be taken by it in good faith in accordance with the
direction of Holders of Certificates evidencing not less than 25% of the Voting
Rights of Certificates relating to the time, method, and place of conducting any
proceeding for any remedy available to the Trustee, or exercising any trust or
power conferred upon the Trustee under this Agreement. As long as any Voting
Rights are held by parties other than the Seller, its Affiliates, or its agents,
Voting Rights of Certificates held by the Seller, its Affiliates or its agents
as the Seller shall certify to the Trustee upon any entity obtaining such
ownership, will be excluded from participating in such voting arrangements, and
excluded from determining the 25% threshold.

         Section 8.02 Certain Matters Affecting the Trustee.

         Except as otherwise provided in Section 8.01:

         (a) the Trustee may request and rely upon and shall be protected in
acting or refraining from acting upon any resolution, Officer's Certificate,
certificate of auditors or any other certificate, statement, instrument,
opinion, report, notice, request, consent, order, appraisal, bond or other paper
or document

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believed by it to be genuine and to have been signed or presented by the proper
party or parties and the Trustee shall have no responsibility to ascertain or
confirm the genuineness of any signature of any such party or parties;

         (b) the Trustee may consult with counsel, financial advisers or
accountants and the advice of any such counsel, financial advisers or
accountants and any Opinion of Counsel shall be full and complete authorization
and protection in respect of any action taken or suffered or omitted by it
hereunder in good faith and in accordance with such Opinion of Counsel;

         (c) the Trustee shall not be liable for any action taken, suffered or
omitted by it in good faith and believed by it to be authorized or within the
discretion or rights or powers conferred upon it by this Agreement;

         (d) the Trustee shall not be bound to make any investigation into the
facts or matters stated in any resolution, certificate, statement, instrument,
opinion, report, notice, request, consent, order, approval, bond or other paper
or document, unless requested in writing so to do by Holders of Certificates
evidencing not less than 25% of the Voting Rights allocated to each Class of
Certificates; provided, however, that no Certificates held by the Seller, the
Depositor or any Affiliate shall be given effect for the purpose of calculating
any such aggregation of Voting Rights;

         (e) the Trustee may execute any of the trusts or powers hereunder or
perform any duties hereunder either directly or by or through agents,
accountants or attorneys and the Trustee shall not be responsible for any
misconduct or negligence on the part of any agents, accountants or attorneys
appointed with due care by it hereunder;

         (f) the Trustee shall not be required to risk or expend its own funds
or otherwise incur any financial liability in the performance of any of its
duties or in the exercise of any of its rights or powers hereunder if it shall
have reasonable grounds for believing that repayment of such funds or adequate
indemnity against such risk or liability is not assured to it;

         (g) the Trustee shall not be liable for any loss on any investment of
funds pursuant to this Agreement (other than as issuer of the investment
security);

         (h) the Trustee shall not be deemed to have knowledge of an Event of
Default until a Responsible Officer of the Trustee shall have received written
notice thereof;

         (i) the Trustee shall be under no obligation to exercise any of the
trusts, rights or powers vested in it by this Agreement or to institute, conduct
or defend any litigation hereunder or in relation hereto at the request, order
or direction of any of the Certificateholders, pursuant to this Agreement,
unless such Certificateholders shall have offered to the Trustee reasonable
security or indemnity satisfactory to the Trustee against the costs, expenses
and liabilities which may be incurred therein or thereby;

         (j) the Trustee or its Affiliates are permitted to receive additional
compensation that could be deemed to be in the Trustee's economic self-interest
for (i) serving as investment adviser, administrator, shareholder servicing
agent, custodian or sub-custodian with respect to certain of the Permitted
Investments, (ii) using Affiliates to effect transactions in certain Permitted
Investments and (iii) effecting transactions in certain Permitted Investments.
The Trustee does not guarantee the performance of any Permitted Investment; and

         (k) the Trustee shall not knowingly take any action that would cause
the Trust Fund to fail to qualify as a qualifying special purpose entity.

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         In order to comply with laws, rules, regulations and executive orders
in effect from time to time applicable to banking institutions, including those
relating to the funding of terrorist activities and money laundering
("Applicable Law"), the Trustee is required to obtain, verify and record certain
information relating to individuals and entities which maintain a business
relationship with the Trustee. Accordingly, each of the parties agrees to
provide to the Trustee upon its request from time to time such identifying
information and documentation as may be available for such party in order to
enable the Trustee to comply with Applicable Law.

         Section 8.03 Trustee Not Liable for Certificates or Mortgage Loans.

         The recitals contained herein and in the Certificates shall be taken as
the statements of the Depositor or the Seller, as the case may be, and the
Trustee assumes no responsibility for their correctness. The Trustee makes no
representations as to the validity or sufficiency of this Agreement or of the
Certificates or of any Mortgage Loan or related document other than with respect
to the Trustee's execution and countersignature of the Certificates. The Trustee
shall not be accountable for the use or application by the Depositor or the
Servicer of any funds paid to the Depositor or the Servicer in respect of the
Mortgage Loans or deposited in or withdrawn from the Certificate Account by the
Depositor or the Servicer.

         Except as provided in Section 2.01(c), the Trustee shall have no
responsibility for filing or recording any financing or continuation statement
in any public office at any time or to otherwise perfect or maintain the
perfection of any security interest or lien granted to it hereunder (unless the
Trustee shall have become the successor Servicer). The Trustee makes no
representations as to the validity or sufficiency of this Agreement or of the
Certificates or of any Mortgage Loan or related document or of MERS or the
MERS(R) System other than with respect to the Trustee's execution and
counter-signature of the Certificates.

         The Trustee executes the Certificates not in its individual capacity
but solely as Trustee of the Trust Fund created by this Agreement, in the
exercise of the powers and authority conferred and vested in it by this
Agreement. Each of the undertakings and agreements made on the part of the
Trustee on behalf of the Trust Fund in the Certificates is made and intended not
as a personal undertaking or agreement by the Trustee but is made and intended
for the purpose of binding only the Trust Fund.

         Section 8.04 Trustee May Own Certificates.

         The Trustee in its individual or any other capacity may become the
owner or pledgee of Certificates with the same rights as it would have if it
were not the Trustee.

         Section 8.05 Trustee's Fees and Expenses.

         As compensation for its activities under this Agreement, on each
Distribution Date the Trustee may withdraw from the Distribution Account the
Trustee Fee for that Distribution Date. The Trustee and any director, officer,
employee, or agent of the Trustee shall be indemnified by the Servicer against
any loss, liability, or expense (including reasonable attorney's fees) resulting
from any error in any tax or information return prepared by the Servicer or
incurred in connection with any claim or legal action relating to (a) this
Agreement, (b) the Certificates, or (c) the performance of any of the Trustee's
duties under this Agreement, other than any loss, liability or expense incurred
because of willful misfeasance, bad faith or negligence in the performance of
any of the Trustee's duties hereunder or incurred by reason of any action of the
Trustee taken at the direction of the Certificateholders under this Agreement.
This indemnity shall survive the termination of this Agreement or the
resignation or removal of the Trustee under this Agreement. Without limiting the
foregoing, except as otherwise agreed upon in writing by the

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Depositor and the Trustee, and except for any expense, disbursement, or advance
arising from the Trustee's negligence, bad faith, or willful misconduct, the
Servicer shall pay or reimburse the Trustee, for all reasonable expenses,
disbursements, and advances incurred or made by the Trustee in accordance with
this Agreement with respect to

         (A) the reasonable compensation, expenses, and disbursements of its
counsel not associated with the closing of the issuance of the Certificates, and

         (B) the reasonable compensation, expenses, and disbursements of any
accountant, engineer, or appraiser that is not regularly employed by the
Trustee, to the extent that the Trustee must engage them to perform services
under this Agreement.

Except as otherwise provided in this Agreement, the Trustee shall not be
entitled to payment or reimbursement for any routine ongoing expenses incurred
by the Trustee in the ordinary course of its duties as Trustee, Supplemental
Interest Trustee, Registrar, or Paying Agent under this Agreement or for any
other expenses.

         Section 8.06 Eligibility Requirements for the Trustee.

         The Trustee hereunder shall at all times be a corporation or
association organized and doing business under the laws of a state or the United
States of America, authorized under such laws to exercise corporate trust
powers, having a combined capital and surplus of at least $50,000,000, subject
to supervision or examination by federal or state authority and with a credit
rating which would not cause either of the Rating Agencies to reduce their
respective then current ratings of the Certificates (or having provided such
security from time to time as is sufficient to avoid such reduction) as
evidenced in writing by each Rating Agency. If such corporation or association
publishes reports of condition at least annually, pursuant to law or to the
requirements of the aforesaid supervising or examining authority, then for the
purposes of this Section 8.06 the combined capital and surplus of such
corporation or association shall be deemed to be its combined capital and
surplus as set forth in its most recent report of condition so published. In
case at any time the Trustee shall cease to be eligible in accordance with this
Section 8.06, the Trustee shall resign immediately in the manner and with the
effect specified in Section 8.07. The entity serving as Trustee may have normal
banking and trust relationships with the Depositor and its affiliates or the
Servicer and its affiliates; provided, however, that such entity cannot be an
affiliate of the Seller, the Depositor or the Servicer other than the Trustee in
its role as successor to the Servicer.

         Section 8.07 Resignation and Removal of the Trustee.

         The Trustee may at any time resign and be discharged from the trusts
hereby created by giving written notice of resignation to the Depositor, the
Servicer, and each Rating Agency not less than 60 days before the date specified
in such notice, when, subject to Section 8.08, such resignation is to take
effect, and acceptance by a successor trustee in accordance with Section 8.08
meeting the qualifications set forth in Section 8.06. If no successor trustee
meeting such qualifications shall have been so appointed and have accepted
appointment within 30 days after the giving of such notice or resignation, the
resigning Trustee may petition any court of competent jurisdiction for the
appointment of a successor trustee.

         As a condition to the effectiveness of any such resignation, at least
15 calendar days prior to the effective date of such resignation, the Trustee
shall provide (x) written notice to the Depositor of any successor pursuant to
this Section and (y) in writing and in form and substance reasonably
satisfactory to the Depositor, all information reasonably requested by the
Depositor in order to comply with its reporting obligation under Item 6.02 of
Form 8-K with respect to the resignation of the Trustee.

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         If at any time (i) the Trustee shall cease to be eligible in accordance
with Section 8.06 and shall fail to resign after written request thereto by the
Depositor, (ii) the Trustee shall become incapable of acting, or shall be
adjudged as bankrupt or insolvent, or a receiver of the Trustee or of its
property shall be appointed, or any public officer shall take charge or control
of the Trustee or of its property or affairs for the purpose of rehabilitation,
conservation or liquidation, (iii)(A) a tax is imposed with respect to the Trust
Fund by any state in which the Trustee or the Trust Fund is located, (B) the
imposition of such tax would be avoided by the appointment of a different
trustee and (C) the Trustee has not paid such tax, or (iv) during the period
which the Depositor is required to file Exchange Act Reports with respect to the
Trust Fund, the Trustee fails to comply with its obligations under the last
sentence of Section 7.01, the preceding paragraph, Section 8.09 or Article 11
and such failure is not remedied within the lesser of 10 calendar days or such
period in which the applicable Exchange Act Report can be filed timely (without
taking into account any extensions), then, in the case of clauses (i) through
(iii), then the Depositor or the Servicer, or in the case of clause (iv), the
Depositor, may remove the Trustee and appoint a successor trustee by written
instrument, in triplicate, one copy of which shall be delivered to the Trustee,
one copy to the Servicer and one copy to the successor trustee.

         The Holders of Certificates entitled to at least 51% of the Voting
Rights may at any time remove the Trustee and appoint a successor trustee by
written instrument or instruments, in triplicate, signed by such Holders or
their attorneys-in-fact duly authorized, one complete set of which shall be
delivered by the successor Trustee to the Servicer, one complete set to the
Trustee so removed, one complete set to the successor so appointed and one
complete set to the Depositor, together with a written description of the basis
for such removal. As long as any Voting Rights are held by parties other than
the Seller, its Affiliates, or its agents, Voting Rights of Certificates held by
the Seller, its Affiliates or its agents as the Seller shall certify to the
Trustee upon any such entity obtaining such ownership will be excluded from
participating in such voting arrangements, and excluded from determining the 51%
threshold. The successor trustee shall notify each Rating Agency of any removal
of the Trustee.

         Any resignation or removal of the Trustee and appointment of a
successor trustee pursuant to this Section 8.07 shall become effective upon
acceptance of appointment by the successor trustee as provided in Section 8.08.

         Section 8.08 Successor Trustee.

         Any successor trustee appointed as provided in Section 8.07 shall
execute, acknowledge and deliver to the Depositor and to its predecessor trustee
and the Servicer an instrument accepting such appointment hereunder and
thereupon the resignation or removal of the predecessor trustee shall become
effective and such successor trustee, without any further act, deed or
conveyance, shall become fully vested with all the rights, powers, duties and
obligations of its predecessor hereunder, with the like effect as if originally
named as trustee herein. The Depositor, the Servicer and the predecessor trustee
shall execute and deliver such instruments and do such other things as may
reasonably be required for more fully and certainly vesting and confirming in
the successor trustee all such rights, powers, duties, and obligations.

         No successor trustee shall accept appointment as provided in this
Section 8.08 unless, at the time of its acceptance, the successor trustee is
eligible under Section 8.06 and its appointment does not adversely affect the
then current rating of the Certificates and has provided to the Depositor in
writing and in form and substance reasonably satisfactory to the Depositor, all
information reasonably requested by the Depositor in order to comply with its
reporting obligation under Item 6.02 of Form 8-K with respect to a replacement
Trustee.

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         Upon acceptance of appointment by a successor trustee as provided in
this Section 8.08, the Depositor shall mail notice of the succession of such
trustee hereunder to all Holders of Certificates. If the Depositor fails to mail
such notice within 10 days after acceptance of appointment by the successor
trustee, the successor trustee shall cause such notice to be mailed at the
expense of the Depositor.

         Section 8.09 Merger or Consolidation of the Trustee.

         Any corporation into which the Trustee may be merged or converted or
with which it may be consolidated or any corporation resulting from any merger,
conversion or consolidation to which the Trustee shall be a party, or any
corporation succeeding to the business of the Trustee, shall be the successor of
the Trustee hereunder, provided that such corporation shall be eligible under
Section 8.06 without the execution or filing of any paper or further act on the
part of any of the parties hereto, anything herein to the contrary
notwithstanding.

         As a condition to the effectiveness of any merger or consolidation, at
least 15 calendar days prior to the effective date of any merger or
consolidation of the Trustee, the Trustee shall provide (x) written notice to
the Depositor of any successor pursuant to this Section and (y) in writing and
in form and substance reasonably satisfactory to the Depositor, all information
reasonably requested by the Depositor in order to comply with its reporting
obligation under Item 6.02 of Form 8-K with respect to a replacement Trustee.

         Section 8.10 Appointment of Co-Trustee or Separate Trustee.

         Notwithstanding any other provisions of this Agreement, at any time,
for the purpose of meeting any legal requirements of any jurisdiction in which
any part of the Trust Fund or property securing any Mortgage Note may at the
time be located, the Servicer and the Trustee acting jointly shall have the
power and shall execute and deliver all instruments to appoint one or more
Persons approved by the Trustee to act as co-trustee or co-trustees jointly with
the Trustee, or separate trustee or separate trustees, of all or any part of the
Trust Fund, and to vest in such Person or Persons, in such capacity and for the
benefit of the Certificateholders, such title to the Trust Fund or any part
thereof, whichever is applicable, and, subject to the other provisions of this
Section 8.10, such powers, duties, obligations, rights and trusts as the
Servicer and the Trustee may consider appropriate. If the Servicer shall not
have joined in such appointment within 15 days after the receipt by it of a
request to do so, or in the case an Event of Default shall have occurred and be
continuing, the Trustee alone shall have the power to make such appointment. No
co-trustee or separate trustee hereunder shall be required to meet the terms of
eligibility as a successor trustee under Section 8.06 and no notice to
Certificateholders of the appointment of any co-trustee or separate trustee
shall be required under Section 8.08.

         Every separate trustee and co-trustee shall, to the extent permitted by
law, be appointed and act subject to the following provisions and conditions:

         (a) To the extent necessary to effectuate the purposes of this Section
8.10, all rights, powers, duties and obligations conferred or imposed upon the
Trustee, except for the obligation of the Trustee under this Agreement to
advance funds on behalf of the Servicer, shall be conferred or imposed upon and
exercised or performed by the Trustee and such separate trustee or co-trustee
jointly (it being understood that such separate trustee or co-trustee is not
authorized to act separately without the Trustee joining in such act), except to
the extent that under any law of any jurisdiction in which any particular act or
acts are to be performed (whether as Trustee hereunder or as successor to the
Servicer hereunder), the Trustee shall be incompetent or unqualified to perform
such act or acts, in which event such rights, powers, duties and obligations
(including the holding of title to the applicable Trust Fund or any portion
thereof in any such

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jurisdiction) shall be exercised and performed singly by such separate trustee
or co-trustee, but solely at the direction of the Trustee;

         (b) No trustee hereunder shall be held personally liable because of any
act or omission of any other trustee hereunder and such appointment shall not,
and shall not be deemed to, constitute any such separate trustee or co-trustee
as agent of the Trustee;

         (c) The Trustee may at any time accept the resignation of or remove any
separate trustee or co-trustee; and

         (d) The Servicer, and not the Trustee, shall be liable for the payment
of reasonable compensation, reimbursement and indemnification to any such
separate trustee or co-trustee.

         Any notice, request or other writing given to the Trustee shall be
deemed to have been given to each of the separate trustees and co-trustees, when
and as effectively as if given to each of them. Every instrument appointing any
separate trustee or co-trustee shall refer to this Agreement and the conditions
of this Article VIII. Each separate trustee and co-trustee, upon its acceptance
of the trusts conferred, shall be vested with the estates or property specified
in its instrument of appointment, either jointly with the Trustee or separately,
as may be provided therein, subject to all the provisions of this Agreement,
specifically including every provision of this Agreement relating to the conduct
of, affecting the liability of, or affording protection to, the Trustee. Every
such instrument shall be filed with the Trustee and a copy thereof given to the
Servicer and the Depositor.

         Any separate trustee or co-trustee may, at any time, constitute the
Trustee its agent or attorney-in-fact, with full power and authority, to the
extent not prohibited by law, to do any lawful act under or in respect of this
Agreement on its behalf and in its name. If any separate trustee or co-trustee
shall die, become incapable of acting, resign or be removed, all of its estates,
properties, rights, remedies and trusts shall vest in and be exercised by the
Trustee, to the extent permitted by law, without the appointment of a new or
successor trustee.

         Section 8.11 Tax Matters.

         It is intended that the assets with respect to which one or more REMIC
elections pertaining to the Trust Fund is to be made, as set forth in the
Preliminary Statement, shall constitute, and that the conduct of matters
relating to such assets shall be such as to qualify such assets as, a "real
estate mortgage investment conduit" as defined in and in accordance with the
REMIC Provisions. In furtherance of such intention, the Trustee covenants and
agrees that it shall act as agent (and the Trustee is hereby appointed to act as
agent) on behalf of each REMIC created under this Agreement and that in such
capacity it shall:

         (a) prepare and file in a timely manner, a U.S. Real Estate Mortgage
Investment Conduit Income Tax Return (Form 1066 or any successor form adopted by
the Internal Revenue Service) with respect to each REMIC created hereunder and
prepare and file with the Internal Revenue Service and applicable state or local
tax authorities income tax or information returns for each taxable year with
respect to each REMIC described in the Preliminary Statement, containing such
information and at the times and in the manner as may be required by the Code or
state or local tax laws, regulations, or rules, and furnish to
Certificateholders the schedules, statements or information at such times and in
such manner as may be required thereby;

         (b) within thirty days of the Closing Date, furnish to the Internal
Revenue Service, on Forms 8811 or as otherwise may be required by the Code, the
name, title, address, and telephone number of the person that the holders of the
Certificates may contact for tax information relating thereto, together with
such

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additional information as may be required by such Form, and update such
information at the time or times in the manner required by the Code;

         (c) make an election that each REMIC created under this Agreement be
treated as a REMIC on the federal tax return for its first taxable year (and, if
necessary, under applicable state law);

         (d) prepare and forward to the Certificateholders and to the Internal
Revenue Service and, if necessary, state tax authorities, all information
returns and reports as and when required to be provided to them in accordance
with the REMIC Provisions, including the calculations of any original issue
discount and of taxable income or net loss to the holders of the residual
interests in each REMIC created hereunder using the Prepayment Assumption (as
defined in the Prospectus Supplement). For purposes of calculating taxable
income or net loss to the holders of the residual interests in each such REMIC,
the Trustee also shall assume that the indices in respect of any adjustable rate
Mortgage Loans are static until the liquidation or purchase of the Mortgage
Loans in accordance with Section 9.01;

         (e) provide information necessary for the computation of tax imposed on
the transfer of a Residual Certificate to a Person that is not a Permitted
Transferee, or an agent (including a broker, nominee or other middleman) of a
Person that is not a Permitted Transferee, or a pass-through entity in which a
Person that is not a Permitted Transferee is the record holder of an interest
(the reasonable cost of computing and furnishing such information may be charged
to the Person liable for such tax);

         (f) to the extent that they are under its control, conduct matters
relating to such assets at all times that any Certificates are outstanding so as
to maintain the status as any REMIC created under this Agreement under the REMIC
Provisions;

         (g) not knowingly or intentionally take any action or omit to take any
action that would cause the termination of the REMIC status of any REMIC created
under this Agreement;

         (h) pay, from the sources specified in the third paragraph of this
Section 8.11, the amount of any federal or state tax, including prohibited
transaction taxes as described below, imposed on any REMIC before its
termination when and as the same shall be due and payable (but such obligation
shall not prevent the Trustee or any other appropriate Person from contesting
any such tax in appropriate proceedings and shall not prevent the Trustee from
withholding payment of such tax, if permitted by law, pending the outcome of
such proceedings);

         (i) ensure that federal, state or local income tax or information
returns shall be signed by the Trustee or such other person as may be required
to sign such returns by the Code or state or local laws, regulations or rules;

         (j) maintain records relating to each REMIC created under this
Agreement, including the income, expenses, assets, and liabilities thereof and
the fair market value and adjusted basis of the assets determined at such
intervals as may be required by the Code, as may be necessary to prepare the
foregoing returns, schedules, statements or information; and

         (k) as and when necessary and appropriate, represent each REMIC created
under this Agreement in any administrative or judicial proceedings relating to
an examination or audit by any governmental taxing authority, request an
administrative adjustment as to any taxable year of such REMIC, enter into
settlement agreements with any governmental taxing agency, extend any statute of
limitations relating to any tax item of such REMIC, and otherwise act on behalf
of such REMIC in relation to any tax matter or controversy involving it.

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         To enable the Trustee to perform its duties under this Agreement, the
Depositor shall provide to the Trustee within ten days after the Closing Date
all information or data that the Trustee requests in writing and determines to
be relevant for tax purposes to the valuations and offering prices of the
Certificates, including the price, yield, prepayment assumption, and projected
cash flows of the Certificates and the Mortgage Loans. Thereafter, the Depositor
shall provide to the Trustee promptly upon written request therefor any
additional information or data that the Trustee may, from time to time,
reasonably request to enable the Trustee to perform its duties under this
Agreement. The Depositor hereby indemnifies the Trustee for any losses,
liabilities, damages, claims, or expenses of the Trustee arising from any errors
or miscalculations of the Trustee that result from any failure of the Depositor
to provide, or to cause to be provided, accurate information or data to the
Trustee on a timely basis.

         If any tax is imposed on "prohibited transactions" (as defined in
section 860F(a)(2) of the Code) of any REMIC created under this Agreement, on
the "net income from foreclosure property" of any REMIC created under this
Agreement as defined in section 860G(c) of the Code, on any contribution to any
REMIC created under this Agreement after the Startup Day pursuant to section
860G(d) of the Code, or any other tax is imposed, including any minimum tax
imposed on any REMIC created hereunder pursuant to sections 23153 and 24874 of
the California Revenue and Taxation Code, if not paid as otherwise provided for
herein, the tax shall be paid by (i) the Trustee, if any such other tax arises
out of or results from negligence of the Trustee in the performance of any of
its obligations under this Agreement, (ii) the Servicer or the Seller, in the
case of any such minimum tax, if such tax arises out of or results from a breach
by the Servicer or Seller of any of their obligations under this Agreement,
(iii) the Seller, if any such tax arises out of or results from the Seller's
obligation to repurchase a Mortgage Loan pursuant to Section 2.02 or 2.03, or
(iv) in all other cases, or if the Trustee, the Servicer, or the Seller fails to
honor its obligations under the preceding clauses (i), (ii), or (iii), any such
tax will be paid with amounts otherwise to be distributed to the
Certificateholders, as provided in Section 3.09(b).

         The Supplemental Interest Trustee shall deliver or cause to be
delivered a correct, complete and duly executed IRS Form W-9 of the Class A-1
Certificateholder to the Swap Counterparty no later than the first payment date
under the Swap Contract, and, if requested by the Swap Counterparty, an
applicable IRS From W-8IMY.

         The Trustee shall treat the Supplemental Interest Trust as an outside
reserve fund within the meaning of Treasury Regulation 1.860G-2(h) and as a
disregarded entity within the meaning of Treasury Regulation 301.7701-3(c)(2),
in each case, that is owned by the holder of the Class IO Interest. The
Supplemental Interest Trust shall not be an asset of any REMIC created under
this Agreement. The Trustee shall treat the rights of the Holders of the LIBOR
Certificates to receive payments from the Supplemental Interest Trust as rights
in an interest rate cap contract written by the holder of the Class IO Interest
and shall treat the Class IO Interest as having entered into an interest rate
swap agreement with the Swap Counterparty. The Trustee shall allocate tax basis
to the foregoing assets. The Trustee shall treat the rights of the Holders of
the LIBOR Certificates and of the Class IO Interest to receive payments from the
Supplemental Interest Trust, and the obligation of the Class IO Interest to make
payments to the Swap Counterparty, based on the information provided to the
Trustee by the underwriter as soon as practicable after the Closing Date. Thus,
the LIBOR Certificates and the Class IO Interest shall be treated as
representing ownership of not only a Master REMIC regular interest, but also
ownership of an interest in a notional principal contract.

         In the event that the beneficial interest in the Supplemental Interest
Trust is held by a single owner for federal income tax purposes, neither the
Trustee nor the Supplemental Interest Trustee shall be responsible for any
entity level tax reporting for the Supplemental Interest Trust. To the extent
that the Supplemental Interest Trust is determined to be a separate legal entity
from the Supplemental Interest Trustee, any obligation of the Supplemental
Interest Trustee under the Swap Contract shall be deemed to be an obligation of
the Supplemental Interest Trust.

         The Trustee shall file or cause to be filed with the Internal Revenue
Service, Form 1041 or such other form as may be applicable, and shall furnish or
cause to be furnished such forms to the Holders of the Class L Certificates, in
the time or times and in the manner required by the Code.

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                                  ARTICLE NINE

                                   TERMINATION

         Section 9.01 Termination upon Liquidation or Purchase of the Mortgage
Loans.

         Subject to Section 9.03, the obligations and responsibilities of the
Depositor, the Servicer, and the Trustee created hereby shall terminate upon the
earlier of

         (a) the purchase by the Servicer of all Mortgage Loans (and REO
Properties) at the price equal to the sum of

                  (i) 100% of the Stated Principal Balance of each Mortgage Loan
         (other than in respect of a Delinquent Mortgage Loan or REO Property)
         plus one month's accrued interest thereon at the applicable Adjusted
         Mortgage Rate less any amounts collected by the Servicer representing
         principal and interest due after the related Due Date,

                  (ii) the lesser of (x) the appraised value of any Delinquent
         Mortgage Loan or REO Property as determined by the higher of two
         appraisals completed by two independent appraisers selected by the
         Servicer at the expense of the Servicer and (y) the Stated Principal
         Balance of each such Delinquent Mortgage Loan or Mortgage Loan related
         to such REO Property, in each case plus accrued and unpaid interest
         thereon at the applicable Adjusted Net Mortgage Rate,

                  (iii) any costs and damages incurred by the Trust Fund in
         connection with any violation by each Mortgage Loan of any predatory or
         abusive lending law, and

                  (iv) any Swap Termination Payment owed to the Swap
         Counterparty, and

         (b) the later of

                  (i) the maturity or other liquidation (or any Advance with
         respect thereto) of the last Mortgage Loan and the disposition of all
         REO Property and

                  (ii) the distribution to Certificateholders of all amounts
         required to be distributed to them pursuant to this Agreement. In no
         event shall the trusts created hereby continue beyond the expiration of
         21 years from the death of the survivor of the descendants of Joseph P.
         Kennedy, the late Ambassador of the United States to the Court of St.
         James's, living on the date of this Agreement.

         The right to purchase all Mortgage Loans and REO Properties pursuant to
clause (a) above shall be conditioned upon the aggregate Stated Principal
Balance of those Mortgage Loans, at the time of any such repurchase, aggregating
less than ten percent (10%) of the aggregate Stated Principal Balance of the
Mortgage Loans as of the Cut-off Date. The first Distribution Date on which the
right to purchase all Mortgage Loans and REO Properties pursuant to clause (a)
above first becomes exercisable is referred to as the "Optional Termination
Date." The Servicer shall effect any such repurchase by depositing the purchase
price, as calculated above, as of the month preceding the date on which such
purchase price shall be distributed to Certificateholders into the Certificate
Account. With such repurchase, the Servicer shall acquire any rights or
potential rights of the Certificateholders or the Trustee to causes of action
against any Person relating to the Mortgage Loans or the origination of the
Mortgage Loans, including, without limitation, the right to enforce any breach
of a representation or warranty made at any time with respect to the Mortgage
Loans.

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         The Grantor Trust with respect to the Late Payment Fees shall terminate
automatically upon termination of the Trust Fund.

         Section 9.02 Final Distribution on the Certificates.

         If on any Determination Date the Servicer determines that there are no
Outstanding Mortgage Loans and no other funds or assets in the Trust Fund other
than the funds in the Certificate Account, the Servicer shall direct the Trustee
promptly to send a final distribution notice to each Certificateholder. If the
Servicer elects to terminate the Trust Fund pursuant to clause (a) of Section
9.01, no later than the 15th day of the month preceding the month of the final
Distribution Date the Servicer shall notify the Depositor and the Trustee of the
date the Servicer intends to terminate the Trust Fund and of the applicable
repurchase price of the Mortgage Loans and REO Properties.

         Notice of any termination of the Trust Fund specifying the Distribution
Date on which Certificateholders may surrender their Certificates for payment of
the final distribution and cancellation shall be given promptly by the Trustee
by letter to Certificateholders mailed not earlier than the 15th day and not
later than the last day of the month next preceding the month of such final
distribution. Any such notice shall specify (a) the Distribution Date upon which
final distribution on the Certificates will be made upon presentation and
surrender of Certificates at the office therein designated, (b) the amount of
such final distribution, (c) the location of the office or agency at which such
presentation and surrender must be made, and (d) that the Record Date otherwise
applicable to the Distribution Date is not applicable, distributions being made
only upon presentation and surrender of the Certificates at the office therein
specified. The Servicer will give such notice to each Rating Agency at the time
such notice is given to Certificateholders.

         If this notice is given, the Servicer shall cause all funds in the
Certificate Account to be remitted to the Trustee for deposit in the
Distribution Account on the Business Day before the applicable Distribution Date
in an amount equal to the final distribution in respect of the Certificates.
Upon such final deposit with respect to the Trust Fund and the receipt by the
Trustee of a Request for Release therefor, the Trustee shall promptly release to
the Servicer the Mortgage Files for the Mortgage Loans.

         Upon presentation and surrender of the Certificates, the Trustee shall
cause to be distributed to the Certificateholders of each Class, in each case on
the final Distribution Date and in the order set forth in Section 4.02, in
proportion to their respective Percentage Interests, with respect to
Certificateholders of the same Class, an amount equal to (i) as to each Class of
Regular Certificates, its Certificate Balance plus for each such Class accrued
interest thereon in the case of an interest-bearing Certificate and (ii) as to
the Residual Certificates, any amount remaining on deposit in the Distribution
Account (other than the amounts retained to meet claims) after application
pursuant to clause (i) above. Notwithstanding the reduction of the Certificate
Balance of any Class of Certificates to zero, such Class will be outstanding
hereunder solely for the purpose of receiving distributions and for no other
purpose until the termination of the respective obligations and responsibilities
of the Depositor, the Servicer and the Trustee hereunder in accordance with
Article Nine. The foregoing provisions are intended to distribute to each Class
of Regular Certificates any accrued and unpaid interest and principal to which
they are entitled based on the Pass-Through Rates and actual Class Certificate
Balances set forth in the Preliminary Statement upon liquidation of the Trust
Fund.

         If any affected Certificateholder does not surrender its Certificates
for cancellation within six months after the date specified in the above
mentioned written notice, the Trustee shall give a second written notice to the
remaining Certificateholders to surrender their Certificates for cancellation
and receive the final distribution with respect thereto. If within six months
after the second notice all the applicable Certificates shall not have been
surrendered for cancellation, the Trustee may take appropriate

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steps, or may appoint an agent to take appropriate steps, to contact the
remaining Certificateholders concerning surrender of their Certificates, and the
cost thereof shall be paid out of the funds and other assets which remain a part
of the Trust Fund. If within one year after the second notice all Certificates
shall not have been surrendered for cancellation, then the Class A-R
Certificateholders shall be entitled to all unclaimed funds and other assets of
the Trust Fund which remain subject hereto.

         Section 9.03 Additional Termination Requirements.

         (a) If the Servicer exercises its purchase option with respect to the
Mortgage Loans as provided in Section 9.01, the Trust Fund shall be terminated
in accordance with the following additional requirements, unless the Trustee has
been supplied with an Opinion of Counsel, at the expense of the Servicer, to the
effect that the failure to comply with the requirements of this Section 9.03
will not (i) result in the imposition of taxes on "prohibited transactions" on
any REMIC created hereunder as defined in section 860F of the Code, or (ii)
cause any REMIC created under this Agreement to fail to qualify as a REMIC at
any time that any Certificates are outstanding:

         (b) The Trustee shall sell all of the assets of the Trust Fund to the
Servicer, and, within 90 days of such sale, shall distribute to the
Certificateholders the proceeds of such sale in complete liquidation of each
REMIC created under this Agreement.

         (c) The Trustee shall attach a statement to the final federal income
tax return for each REMIC created under this Agreement stating that pursuant to
Treasury Regulation ss. 1.860F-1, the first day of the 90-day liquidation period
for such REMIC was the date on which the Trustee sold the assets of the Trust
Fund to the Servicer.

         Section 9.04 Termination of the Supplemental Interest Trust.

         The Supplemental Interest Trust shall terminate on the earlier of (i)
the Swap Contract Termination Date and (ii) the termination of this Agreement.

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                                   ARTICLE TEN

                            MISCELLANEOUS PROVISIONS

         Section 10.01 Amendment.

         This Agreement may be amended from time to time by the Depositor, the
Servicer and the Trustee without the consent of any of the Certificateholders
(i) to cure any ambiguity or mistake, (ii) to correct any defective provision in
this Agreement or to supplement any provision in this Agreement which may be
inconsistent with any other provision in this Agreement, (iii) to conform this
Agreement to the Prospectus Supplement, (iv) to add to the duties of the
Depositor, the Seller or the Servicer, (v) to modify, alter, amend, add to or
rescind any of the terms or provisions contained in this Agreement to comply
with any rules or regulations promulgated by the Commission from time to time,
(vi) to add any other provisions with respect to matters or questions arising
under this Agreement, or (vii) to modify, alter, amend, add to, or rescind any
of the terms or provisions contained in this Agreement.

         No action pursuant to clauses (v), (vi) or (vii) above may, as
evidenced by an Opinion of Counsel (which Opinion of Counsel shall not be an
expense of the Trustee or the Trust Fund), adversely affect in any material
respect the interests of any Certificateholder. The amendment shall not be
deemed to adversely affect in any material respect the interests of the
Certificateholders if the Person requesting the amendment obtains a letter from
each Rating Agency stating that the amendment would not result in the
downgrading, qualification or withdrawal of the respective ratings then assigned
to the Certificates. Any such letter in and of itself will not represent a
determination as to the materiality of any amendment and will represent a
determination only as to the credit issues affecting any rating. Each party to
this Agreement agrees that it will cooperate with each other party in amending
this Agreement pursuant to clause (v) above.

         The Trustee, the Depositor, and the Servicer also may at any time and
from time to time amend this Agreement without the consent of the
Certificateholders to modify, eliminate or add to any of its provisions to the
extent necessary or helpful to (i) maintain the qualification of any REMIC
created under this Agreement as a REMIC under the Code, (ii) avoid or minimize
the risk of the imposition of any tax on any REMIC created under this Agreement
pursuant to the Code that would be a claim at any time before the final
redemption of the Certificates, or (iii) comply with any other requirements of
the Code, if the Trustee has been provided an Opinion of Counsel, which opinion
shall be an expense of the party requesting such opinion but in any case shall
not be an expense of the Trustee or the Trust Fund, to the effect that the
action is necessary or helpful for one of the foregoing purposes.

         This Agreement may also be amended from time to time by the Depositor,
the Servicer, and the Trustee with the consent of the Holders of Certificates
evidencing Percentage Interests aggregating not less than 51% of each Class of
Certificates adversely affected thereby for the purpose of adding any provisions
to or changing in any manner or eliminating any of the provisions of this
Agreement or of modifying in any manner the rights of the Holders of
Certificates. As long as any Voting Rights are held by parties other than the
Seller, its Affiliates, or its agents, as the Seller shall certify to the
Trustee upon any such entity obtaining such ownership, Voting Rights of
Certificates held by the Seller, its Affiliates or its agents will be excluded
from participating in such voting arrangements, and excluded from determining
the 51% threshold. No amendment shall

          (i) reduce in any manner the amount of, or delay the timing of,
payments required to be distributed on any Certificate without the consent of
the Holder of such Certificate,

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         (ii) amend, modify, add to, rescind, or alter in any respect Section
10.13, notwithstanding any contrary provision of this Agreement, without the
consent of the Holders of Certificates evidencing Percentage Interests
aggregating not less than 66 2/3% (provided, however, that no Certificates held
by the Seller, the Depositor or any Affiliate thereby shall be given effect for
the purpose of calculating any such aggregation of Percentage Interests), or

         (iii) reduce the aforesaid percentages of Certificates the Holders of
which are required to consent to any such amendment, without the consent of the
Holders of all such Certificates then outstanding.

         Notwithstanding any contrary provision of this Agreement, the Trustee
shall not consent to any amendment to this Agreement unless (i) it shall have
first received an Opinion of Counsel, which opinion shall not be an expense of
the Trustee or the Trust Fund, to the effect that such amendment will not cause
the imposition of any tax on any REMIC created under this Agreement or the
Certificateholders or cause any REMIC created hereunder to fail to qualify as a
REMIC at any time that any Certificates are outstanding and (ii) because the
Trust Fund is required to be a Qualifying Special Purpose Entity (as that term
is defined in Statement of Financial Accounting Standards No. 140 ("SFAS 140"),
in order for the Seller to continue to account for the transfer of the Mortgage
Loans under this Agreement as a sale under SFAS 140, prior to the parties hereto
entering into such an amendment, the Trustee shall receive an Officer's
Certificate, which shall not be an expense of the Trustee or the Trust Fund, to
the effect that such amendment would not "significantly change" (within the
meaning of SFAS 140) the permitted activities of the Trust Fund so as to cause
the Trust Fund to fail to qualify as a Qualifying Special Purpose Entity.

         Notwithstanding any contrary provision of this Agreement, no amendment
shall adversely affect in any material respect the Swap Counterparty without the
prior written consent of the Swap Counterparty, which consent shall not be
unreasonably withheld.

         Promptly after the execution of any amendment to this Agreement
requiring the consent of Certificateholders, the Trustee shall furnish written
notification of the substance or a copy of such amendment to each
Certificateholder and each Rating Agency.

         It shall not be necessary for the consent of Certificateholders under
this Section 10.01 to approve the particular form of any proposed amendment, but
it shall be sufficient if such consent shall approve the substance thereof. The
manner of obtaining such consents and of evidencing the authorization of the
execution thereof by Certificateholders shall be subject to such reasonable
regulations as the Trustee may prescribe.

         Nothing in this Agreement shall require the Trustee to enter into an
amendment without receiving an Opinion of Counsel (which Opinion shall not be an
expense of the Trustee or the Trust Fund), satisfactory to the Trustee that (i)
such amendment is permitted and is not prohibited by this Agreement and that all
requirements for amending this Agreement have been complied with; and (ii)
either (A) the amendment does not adversely affect in any material respect the
interests of any Certificateholder or (B) the conclusion set forth in the
preceding clause (A) is not required to be reached pursuant to this Section
10.01.

         Section 10.02 Recordation of Agreement; Counterparts.

         This Agreement is subject to recordation in all appropriate public
offices for real property records in all the counties or other comparable
jurisdictions in which any or all of the properties subject to the Mortgages are
situated, and in any other appropriate public recording office or elsewhere,
such

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recordation to be effected by the Servicer at its expense, but only upon receipt
of an Opinion of Counsel to the effect that such recordation materially and
beneficially affects the interests of the Certificateholders.

         For the purpose of facilitating the recordation of this Agreement as
herein provided and for other purposes, this Agreement may be executed
simultaneously in any number of counterparts, each of which counterparts shall
be deemed to be an original, and such counterparts shall constitute but one and
the same instrument.

         Section 10.03 Governing Law.

         THIS AGREEMENT SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY
THE SUBSTANTIVE LAWS OF THE STATE OF NEW YORK APPLICABLE TO AGREEMENTS MADE AND
TO BE PERFORMED IN THE STATE OF NEW YORK AND THE OBLIGATIONS, RIGHTS AND
REMEDIES OF THE PARTIES HERETO AND THE CERTIFICATEHOLDERS SHALL BE DETERMINED IN
ACCORDANCE WITH SUCH LAWS.

         Section 10.04 Intention of Parties.

         It is the express intent of the parties hereto that the conveyance (i)
of the Mortgage Loans by the Seller to the Depositor and (ii) of the Trust Fund
by the Depositor to the Trustee each be, and be construed as, an absolute sale
thereof. It is, further, not the intention of the parties that such conveyances
be deemed a pledge thereof. However, if, notwithstanding the intent of the
parties, the assets are held to be the property of the Seller or Depositor, as
the case may be, or if for any other reason this Agreement is held or deemed to
create a security interest in either such assets, then (i) this Agreement shall
be deemed to be a security agreement within the meaning of the UCC and (ii) the
conveyances provided for in this Agreement shall be deemed to be an assignment
and a grant (i) by the Seller to the Depositor or (ii) by the Depositor to the
Trustee, for the benefit of the Certificateholders, of a security interest in
all of the assets transferred, whether now owned or hereafter acquired.

         The Seller and the Depositor for the benefit of the Certificateholders
shall, to the extent consistent with this Agreement, take such actions as may be
necessary to ensure that, if this Agreement were deemed to create a security
interest in the Trust Fund, such security interest would be deemed to be a
perfected security interest of first priority under applicable law and will be
maintained as such throughout the term of the Agreement. The Depositor shall
arrange for filing any Uniform Commercial Code continuation statements in
connection with any security interest granted or assigned to the Trustee for the
benefit of the Certificateholders.

         Section 10.05     Notices.

         (a) The Trustee shall use its best efforts to promptly provide notice
to each Rating Agency and the Swap Counterparty with respect to each of the
following of which it has actual knowledge:

         1. Any material change or amendment to this Agreement;

         2. The occurrence of any Event of Default that has not been cured;

         3. The resignation or termination of the Servicer or the Trustee and
the appointment of any successor;

         4. The repurchase or substitution of Mortgage Loans pursuant to Section
2.03; and

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         5. The final distribution to Certificateholders.

         In addition, the Trustee shall promptly furnish to each Rating Agency
copies of the following:

         1. Each report to Certificateholders described in Section 4.06;

         2. Each annual statement as to compliance described in Section 3.17;

         3. Each annual independent public accountants' servicing report
described in Section 11.07; and

         4. Any notice of a purchase of a Mortgage Loan pursuant to Section
2.02, 2.03 or 3.11.

         (b) All directions, demands and notices hereunder shall be in writing
and shall be deemed to have been duly given when delivered to (a) in the case of
the Depositor, IndyMac MBS, Inc., 155 North Lake Avenue, Pasadena, California
91101, Attention: Secondary Marketing Transaction Management; (b) in the case of
the Servicer, IndyMac Bank, F.S.B., 888 East Walnut Street, Pasadena, California
91101-7211, Attention: Secondary Marketing, Transaction Management or such other
address as may be hereafter furnished to the Depositor and the Trustee by the
Servicer in writing; (c) in the case of the Trustee to the Corporate Trust
Office, Deutsche Bank National Trust Company, 1761 East St. Andrew Place, Santa
Ana, California 92705-4934, Attention: Trust Administration IN07D8, Series
2007-AR8, or such other address as the Trustee may hereafter furnish to the
Depositor or Servicer ; (d) in the case of each of the Rating Agencies, the
address specified therefor in the definition corresponding to the name of such
Rating Agency; and (e) in the case of the Swap Counterparty, Deutsche Bank AG,
New York Branch, 60 Wall Street, New York, NY 10005, or such other address as
may be hereafter furnished by the Swap Counterparty. Notices to
Certificateholders shall be deemed given when mailed, first class postage
prepaid, to their respective addresses appearing in the Certificate Register.

         Section 10.06 Severability of Provisions.

         If any one or more of the covenants, agreements, provisions or terms of
this Agreement shall be for any reason whatsoever held invalid, then such
covenants, agreements, provisions or terms shall be deemed severable from the
remaining covenants, agreements, provisions or terms of this Agreement and shall
in no way affect the validity or enforceability of the other provisions of this
Agreement or of the Certificates or the rights of the Holders thereof.

         Section 10.07 Assignment

         Notwithstanding anything to the contrary contained in this Agreement,
except as provided in Section 6.02, this Agreement may not be assigned by the
Servicer without the prior written consent of the Trustee and Depositor.

         Section 10.08 Limitation on Rights of Certificateholders.

         The death or incapacity of any Certificateholder shall not operate to
terminate this Agreement or the trust created by this Agreement, nor entitle
such Certificateholder's legal representative or heirs to claim an accounting or
to take any action or commence any proceeding in any court for a petition or
winding up of the trust created hereby, or otherwise affect the rights,
obligations and liabilities of the parties to this Agreement or any of them.

         No Certificateholder shall have any right to vote (except as provided
in this Agreement) or in any manner otherwise control the operation and
management of the Trust Fund, or the obligations of the

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parties to this Agreement, nor shall anything herein set forth or contained in
the terms of the Certificates be construed so as to constitute the
Certificateholders from time to time as partners or members of an association;
nor shall any Certificateholder be under any liability to any third party
because of any action taken by the parties to this Agreement pursuant to any
provision of this Agreement.

         No Certificateholder shall have any right by virtue or by availing
itself of any provisions of this Agreement to institute any suit, action or
proceeding in equity or at law upon or under or with respect to this Agreement,
unless such Holder previously shall have given to the Trustee a written notice
of an Event of Default and of the continuance thereof, as provided in this
Agreement, and unless the Holders of Certificates evidencing not less than 25%
of the Voting Rights evidenced by the Certificates shall also have made written
request to the Trustee to institute such action, suit or proceeding in its own
name as Trustee hereunder and shall have offered to the Trustee such reasonable
indemnity as it may require against the costs, expenses, and liabilities to be
incurred therein or thereby, and the Trustee, for 60 days after its receipt of
such notice, request and offer of indemnity shall have neglected or refused to
institute any such action, suit or proceeding; it being understood and intended,
and being expressly covenanted by each Certificateholder with every other
Certificateholder and the Trustee, that no one or more Holders of Certificates
shall have any right in any manner whatever by virtue or by availing itself or
themselves of any provisions of this Agreement to affect, disturb or prejudice
the rights of the Holders of any other of the Certificates, or to obtain or seek
to obtain priority over or preference to any other such Holder or to enforce any
right under this Agreement, except in the manner herein provided and for the
common benefit of all Certificateholders. For the protection and enforcement of
this Section 10.08, each Certificateholder and the Trustee shall be entitled to
any relief that can be given either at law or in equity. As long as any Voting
Rights are held by parties other than the Seller, its Affiliates, or its agents,
Voting Rights of Certificates held by the Seller, its Affiliates or its agents
as the Seller shall certify to the Trustee upon any entity obtaining such
ownership, will be excluded from participating in such voting arrangements, and
excluded from determining the 25% threshold.

         Section 10.09 Inspection and Audit Rights.

         The Servicer agrees that, on reasonable prior notice, it will permit
any representative of the Depositor or the Trustee during the Servicer's normal
business hours, to examine all the books of account, records, reports and other
papers of the Servicer relating to the Mortgage Loans, to make copies and
extracts therefrom, to cause such books to be audited by independent certified
public accountants selected by the Depositor or the Trustee and to discuss its
affairs, finances and accounts relating to the Mortgage Loans with its officers,
employees and independent public accountants (and by this provision the Servicer
hereby authorizes said accountants to discuss with such representative such
affairs, finances and accounts), all at such reasonable times and as often as
may be reasonably requested. Any out-of-pocket expense incident to the exercise
by the Depositor or the Trustee of any right under this Section 10.09 shall be
borne by the party requesting such inspection; all other such expenses shall be
borne by the Servicer.

         Section 10.10 Certificates Nonassessable and Fully Paid.

         It is the intention of the Depositor that Certificateholders shall not
be personally liable for obligations of the Trust Fund, that the interests in
the Trust Fund represented by the Certificates shall be nonassessable for any
reason whatsoever, and that the Certificates, upon due authentication thereof by
the Trustee pursuant to this Agreement, are and shall be deemed fully paid.

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         Section 10.11 Official Record.

         The Seller agrees that this Agreement is and shall remain at all times
before the time at which this Agreement terminates an official record of the
Seller as referred to in Section 13(e) of the Federal Deposit Insurance Act.

         Section 10.12 Protection of Assets.

         (a) Except for transactions and activities entered into in connection
with the securitization that is the subject of this Agreement, the trust created
by this Agreement is not authorized and has no power to:

         (1) borrow money or issue debt;

         (2) merge with another entity, reorganize, liquidate or sell assets;

         (3) engage in any business or activities.

         (b) Each party to this Agreement agrees that it will not file an
involuntary bankruptcy petition against the Trustee or the Trust Fund or
initiate any other form of insolvency proceeding until after the Certificates
have been paid in full.

         Section 10.13 Qualifying Special Purpose Entity.

         Notwithstanding any contrary provision of this Agreement, the Trust
Fund shall not hold any property or engage in any activity that would disqualify
the Trust Fund from being a qualifying special purpose entity under generally
accepted accounting principles.

                                 ARTICLE ELEVEN

                             EXCHANGE ACT REPORTING

         Section 11.01 Filing Obligations.

         The Servicer, the Trustee and the Seller shall reasonably cooperate
with the Depositor in connection with the satisfaction of the Depositor's
reporting requirements under the Exchange Act with respect to the Trust Fund. In
addition to the information specified below, if so requested by the Depositor
for the purpose of satisfying its reporting obligation under the Exchange Act,
the Servicer, the Trustee and the Seller shall provide the Depositor with (a)
such information which is available to such Person without unreasonable effort
or expense and within such timeframe as may be reasonably requested by the
Depositor to comply with the Depositor's reporting obligations under the
Exchange Act and (b) to the extent such Person is a party (and the Depositor is
not a party) to any agreement or amendment required to be filed, copies of such
agreement or amendment in EDGAR-compatible form.

         Section 11.02 Form 10-D Filings.

         (a) In accordance with the Exchange Act, unless no reporting obligation
under the Exchange Act exists at such time with respect to the Trust Fund, the
Trustee shall prepare for filing and file within 15 days after each Distribution
Date (subject to permitted extensions under the Exchange Act) with the
Commission with respect to the Trust Fund, a Form 10-D with copies of the
Monthly Report and, to the extent delivered to the Trustee, no later than five
calendar days following the Distribution Date, such other information identified
by the Depositor or the Servicer, in writing, to be filed with the Commission
(such

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other information, the "Additional Designated Information"). If the Depositor or
Servicer directs that any Additional Designated Information is to be filed with
any Form 10-D, the Depositor or Servicer, as the case may be, shall specify the
Item on Form 10-D to which such information is responsive and, with respect to
any Exhibit to be filed on Form 10-D, the Exhibit number. Any information to be
filed on Form 10-D shall be delivered to the Trustee in EDGAR-compatible form or
as otherwise agreed upon by the Trustee and the Depositor or the Servicer, as
the case may be, at the Depositor's expense, and any necessary conversion to
EDGAR-compatible format will be at the Depositor's expense. At the reasonable
request of, and in accordance with the reasonable directions of, the Depositor
or the Servicer, subject to the two preceding sentences, the Trustee shall
prepare for filing and file an amendment to any Form 10-D previously filed with
the Commission with respect to the Trust Fund. The Depositor shall sign the Form
10-D filed on behalf of the Trust Fund.

         The Trustee shall prepare each Form 10-D and, no later than five
Business Days prior to the date on which such Form 10-D is required to be filed,
deliver a copy of such Form 10-D to the Depositor for review. No later than the
Business Day following the receipt thereof, the Depositor shall notify the
Trustee of any changes to be made to the Form 10-D. The Trustee shall make any
changes thereto requested by the Depositor and deliver the final Form 10-D to
the Depositor for signature no later than three Business Days prior to the date
on which such Form 10-D must be filed by the Trustee in accordance with this
Section 11.02. The Depositor shall execute the final Form 10-D and deliver the
same to the Trustee via electronic mail (DBSEC.Notifications@db.com) or
facsimile no later than the Business Day following receipt of the same (which,
unless not received within such time frame from the Trustee, shall be no later
than two Business Days prior to the date on which the Form 10-D is required to
be filed), with an original executed hard copy to follow by overnight courier.

         (b) No later than each Distribution Date, any party responsible for
providing Additional Designated Information shall notify the Depositor and the
Trustee of any Form 10-D Disclosure Item, together with a description of any
such Form 10-D Disclosure Item in form and substance reasonably acceptable to
the Depositor. In addition to such information as the Servicer and the Trustee
are obligated to provide pursuant to other provisions of this Agreement, if so
requested by the Depositor, each of the Servicer and the Trustee shall provide
such information which is available to the Servicer and the Trustee, as
applicable, without unreasonable effort or expense regarding the performance or
servicing of the Mortgage Loans (in the case of the Trustee, based on the
information provided by the Servicer) as is reasonably required to facilitate
preparation of distribution reports in accordance with Item 1121 of Regulation
AB. Such information shall be provided concurrently with the reports specified
in Section 4.06(d) in the case of the Servicer and the Monthly Statement in the
case of the Trustee, commencing with the first such report due not less than
five Business Days following such request.

         (c) The Trustee shall not have any responsibility to file any items
(other than those generated by it) that have not been received in a format
suitable (or readily convertible into a format suitable) for electronic filing
via the EDGAR system and shall not have any responsibility to convert any such
items to such format (other than those items generated by it or that are readily
convertible to such format). The Trustee shall have no liability to the
Certificateholders, the Trust Fund, the Servicer or the Depositor with respect
to any failure to properly prepare or file any of Form 10-D to the extent that
such failure is not the result of any negligence, bad faith or willful
misconduct on its part. The Trustee will not have any duty to verify the
accuracy or sufficiency of any information to be included in any Form 10-D not
provided by it. The Trustee shall have no liability with respect to any failure
to properly prepare and file such periodic reports resulting from or relating to
the Trustee's inability or failure to obtain any information not resulting from
its own negligence or willful misconduct.

                                      114
<PAGE>

         Section 11.03 Form 8-K Filings.

         The Servicer shall prepare and file on behalf of the Trust Fund any
Form 8-K required by the Exchange Act. Each Form 8-K must be signed by the
Servicer. Any reporting party identified on Exhibit T shall promptly notify the
Depositor and the Servicer (if the notifying party is not the Servicer), but in
no event later than one (1) Business Day after its occurrence, of any Reportable
Event of which it has actual knowledge. Each Person shall be deemed to have
actual knowledge of any such event to the extent that it relates to such Person
or any action or failure to act by such Person.

         Section 11.04     Form 10-K Filings.

         Prior to (x) March 31, 2008 and (y) unless and until a Form 15
Suspension Notice shall have been filed, March 31st of each year thereafter (or,
in either case, such earlier date as may be required by the Exchange Act), the
Trustee shall, subject to the provisions of this Section 11.04, file a Form
10-K, with respect to the Trust Fund. The Trustee shall prepare and file on
behalf of the Trust Fund a Form 10-K, in form and substance as required by the
Exchange Act. The Trustee shall prepare each Form 10-K and, no later than 5
Business Days prior to the date on which such Form 10-K is required to be filed,
deliver a copy of such Form 10-K to the Depositor for review. No later than the
Business Day following the receipt thereof, the Depositor shall notify the
Trustee of any changes to be made to the Form 10-K. The Trustee shall make any
changes thereto requested by the Depositor and deliver the final Form 10-K to
the Depositor for signature no later than three Business Days prior to the date
on which such Form 10-K must be filed by the Trustee in accordance with this
Section 11.04. The Depositor shall execute the final Form 10-K and deliver the
same to the Trustee via electronic mail (DBSEC.Notifications@db.com) or
facsimile no later than Business Day following receipt of the same (which,
unless not received within such time frame from the Trustee, shall be no later
than two Business Days prior to the date on which the From 10-K is required to
be filed), with an original executed hard copy to follow by overnight mail. Such
Form 10-K shall include the Assessment of Compliance, Attestation Report, Annual
Compliance Statements and other documentation provided by the Servicer pursuant
to Sections 3.17 and 11.07, a certification in the form attached hereto as
Exhibit O-1 (the "Depositor Certification"), which shall be signed by the senior
officer of the Depositor in charge of securitization, and an accountant's report
described under Section 11.07. Each Form 10-K shall also include any
Sarbanes-Oxley Certification required to be included therewith, as described in
Section 11.05.

         If the Item 1119 Parties listed on Exhibit T have changed since the
Closing Date, no later than March 1 of each year, the Depositor shall provide
each of the Servicer and the Trustee via electronic mail
(DBSEC.Notifications@db.com) with an updated Exhibit T setting forth the Item
1119 Parties.

         As to each item of information required to be included in any Form
10-D, Form 8-K or Form 10-K, the Trustee's or Depositor's obligation to include
the information in the applicable report is subject to receipt from the entity
that is indicated in Exhibit Q as the responsible party for providing that
information, if other than the Trustee or the Depositor, as applicable, as and
when required as described above. Each of the Trustee, the Servicer and the
Depositor, as applicable, hereby agree to notify and provide to the Trustee and
the Depositor all information that is required to be included in any Form 10-D,
Form 8-K or Form 10-K, with respect to which that entity is indicated in Exhibit
Q as the responsible party for providing that information. In the case of
information to be included in the From 10-D, such information shall be delivered
to the Trustee (with a copy to the Depositor) no later than 5 calendar days
following each Distribution Date. In the case of information to be included in
the Form 8-K, such information shall be delivered to the Depositor no later than
no later 2 Business Days following the occurrence of a reportable event. In the
case of information to be included in the From 10-K, such information, other
than the documentation provided pursuant to Sections 3.17 and 11.07, shall be
delivered to the Trustee no later than (x) March 1, 2008 (with a 15-day cure
period) and (y) unless and

                                      115
<PAGE>

until a Form 15 Suspension Notice shall have been filed, March 1st of each year
thereafter. The Servicer shall be responsible for determining the pool
concentration applicable to any subservicer or originator at any time, for
purposes of disclosure as required by Items 1117 and 1119 of Regulation AB. The
Trustee shall provide electronic or paper copies of all Form 10-D, 8-K and 10-K
filings free of charge to any Certificateholder upon request.

         The Trustee shall sign a certification (in the form attached hereto as
Exhibit O-2) for the benefit of the Depositor and its officers, directors and
Affiliates. The Trustee's certification shall be delivered to the Depositor by
no later than March 18th of each year (or if such day is not a Business Day, the
immediately preceding Business Day) and the Depositor shall deliver the
Depositor Certification to the Trustee for filing no later than March 20th of
each year (or if such day is not a Business Day, the immediately preceding
Business Day).

         The Trustee shall indemnify and hold harmless the Depositor and its
officers, directors and Affiliates from and against any losses, damages,
penalties, fines, forfeitures, reasonable and necessary legal fees and related
costs, judgments and other costs and expenses arising out of or based upon (i) a
breach of the Trustee's obligations under this Section 11.04 and Section 11.07
or (ii) any material misstatement or omission contained in any information
provided by the Trustee including, without limitation, in the certification
provided by the Trustee in the form of Exhibit O-2 or the assessment of
compliance provided pursuant to Section 11.07. If the indemnification provided
for herein is unavailable or insufficient to hold harmless the Depositor, then
the Trustee, in connection with (i) a breach of the Trustee's obligations under
this Section 11.04 or Section 11.07 or (ii) any material misstatement or
omission contained in any information provided by the Trustee including, without
limitation, in the certification provided by the Trustee in the form of Exhibit
O-2, or in the assessment of compliance or attestation report provided pursuant
to Section 11.07, agrees that it shall contribute to the amount paid or payable
by the Depositor as a result of the losses, claims, damages or liabilities of
the Depositor in such proportion as is appropriate to reflect the relative fault
of the Depositor on the one hand and the Trustee on the other. This
indemnification shall survive the termination of this Agreement or the
termination of any party to this Agreement.

         The Servicer shall indemnify and hold harmless the Depositor, the
Trustee and their respective officers, directors and Affiliates from and against
any actual losses, damages, penalties, fines, forfeitures, reasonable and
necessary legal fees and related costs, judgments and other costs and expenses
that such Person may sustain based upon (i) a breach of the Servicer's
obligations under Sections 3.17, 11.07 or 11.04 or (ii) any material
misstatement or omission contained in any information provided by the Servicer
including, without limitation, in the information provided pursuant to Sections
3.17 and 11.07. This indemnification shall survive the termination of this
Agreement or the termination of any party to this Agreement.

         The Depositor shall indemnify and hold harmless the Servicer, the
Trustee and their respective officers, directors and Affiliates from and against
any actual losses, damages, penalties, fines, forfeitures, reasonable and
necessary legal fees and related costs, judgments and other costs and expenses
that such Person may sustain based upon (i) a breach of the Depositor's
obligations under this Section 11.04 or (ii) any material misstatement or
omission contained in any information provided by the Depositor.

         The Trustee will have no duty or liability to verify the accuracy or
sufficiency of any information not prepared by it included in any Form 10-D,
Form 10-K or Form 8-K. The Trustee shall have no liability with respect to any
failure to properly prepare or file any Form 10-D or Form 10-K resulting from or
relating to the Trustee's inability or failure to receive any information in a
timely manner from the party responsible for delivery of such information. The
Trustee shall have no liability with respect to any failure to properly file any
Form 10-D or 10-K resulting from or relating to the Depositor's failure to

                                      116
<PAGE>

timely comply with the provisions of this section. Nothing herein shall be
construed to require the Trustee or any officer, director or Affiliate thereof
to sign any Form 10-D, Form 10-K or Form 8-K. Copies of all reports filed by the
Trustee under the Exchange Act shall be sent to the Depositor electronically or
at the address set forth in Section 10.05. Fees and expenses incurred by the
Trustee in connection with this Section 11.04 shall not be reimbursable from the
Trust Fund.

         Upon any filing with the Commission, the Trustee shall promptly deliver
to the Depositor a copy of any executed report, statement or information.

         To the extent that, following the Closing Date, the Depositor certifies
that reports and certifications differing from those required under this Section
11.04 are necessary to comply with the reporting requirements under the Exchange
Act, the parties hereto hereby agree that each will reasonably cooperate to
amend the provisions of this Section 11.04 in order to comply with such amended
reporting requirements and such amendment of this Section 11.04. Any such
amendment may result in the reduction of the reports executed by and filed on
behalf of the Depositor under the Exchange Act. Notwithstanding the foregoing,
the Trustee shall not be obligated to enter into any amendment pursuant to this
Section that adversely affects its obligations and immunities under this
Agreement.

         Each of the parties acknowledges and agrees that the purpose of
Sections 3.17, 11.07 and this Section 11.04 of this Agreement is to facilitate
compliance by the Depositor with the provisions of Regulation AB. Therefore,
each of the parties agree that (a) the obligations of the parties hereunder
shall be interpreted in such a manner as to accomplish that purpose, (b) the
parties' obligations hereunder will be supplemented and modified as necessary to
be consistent with any such amendments, interpretive advice or guidance in
respect of the requirements of Regulation AB, (c) the parties shall comply with
reasonable requests made by the Depositor for delivery of additional or
different information as the Depositor may determine in good faith is necessary
to comply with the provisions of Regulation AB, and (d) no amendment of this
Agreement shall be required to effect any such changes in the parties'
obligations as are necessary to accommodate evolving interpretations of the
provisions of Regulation AB.

         Section 11.05 Sarbanes-Oxley Certification.

         Each Form 10-K shall include a certification (the "Sarbanes-Oxley
Certification") required by Rules 13a-14(d) and 15d-14(d) under the Exchange Act
(pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 and the rules and
regulations of the Commission promulgated thereunder (including any
interpretations thereof by the Commission's staff)). No later than March 15 of
each year, beginning in 2008, the Servicer and the Trustee shall (unless such
person is the Certifying Person), and the Servicer shall cause each Reporting
Subcontractor and the Trustee shall cause each Reporting Subcontractor to,
provide to the Person who signs the Sarbanes-Oxley Certification (the
"Certifying Person") a certification (each, a "Performance Certification"), in
the form attached hereto as Exhibit R on which the Certifying Person, the entity
for which the Certifying Person acts as an officer, and such entity's officers,
directors and Affiliates (collectively with the Certifying Person,
"Certification Parties") can reasonably rely. The senior officer in charge of
the servicing function of the Servicer shall serve as the Certifying Person on
behalf of the Trust Fund. Neither the Servicer nor the Depositor will request
delivery of a certification under this clause unless the Trustee is required
under the Exchange Act to file an annual report on Form 10-K with respect to the
Trust Fund. In the event that prior to the filing date of the Form 10-K in March
of each year, the Servicer or the Depositor has actual knowledge of information
material to the Sarbanes-Oxley Certification, the Servicer or the Depositor, as
the case may be, shall promptly notify the Servicer and the Trustee. The
respective parties hereto agree to cooperate with all reasonable requests made
by any Certifying Person or Certification Party in connection with such Person's
attempt to conduct any due diligence that such Person reasonably believes to be
appropriate in order to allow it to deliver any Sarbanes-Oxley Certification or
portion thereof with respect to the Trust Fund.

                                      117
<PAGE>

         Section 11.06 Form 15 Filing.

         Prior to January 30 of the first year in which the Depositor is able to
do so under applicable law, the Trustee on behalf of the Depositor shall file a
Form 15 relating to the automatic suspension of reporting in respect of the
Trust Fund under the Exchange Act.

         Section 11.07 Report on Assessment of Compliance and Attestation.

         (a) On or before March 15 of each calendar year, commencing in 2008,
unless no reporting obligation under the Exchange Act exists at such time with
respect to the Trust Fund:

                  (i) The Servicer shall deliver to the Trustee (with a copy to
         the Depositor) a report (in form and substance reasonably satisfactory
         to the Trustee) regarding the Servicer's or the Trustee's, as
         applicable, assessment of compliance with the Servicing Criteria during
         the immediately preceding calendar year, as required under Rules 13a-18
         and 15d-18 of the Exchange Act and Item 1122 of Regulation AB. Such
         report shall be signed by an authorized officer of such Person and
         shall address each of the Servicing Criteria applicable to each party
         specified on a certification delivered to the Trustee substantially in
         the form of Exhibit S. To the extent any of the Servicing Criteria are
         not applicable to such Person, with respect to asset-backed securities
         transactions taken as a whole involving such Person and that are backed
         by the same asset type backing the Certificates, such report shall
         include such a statement to that effect. The Trustee and the Servicer,
         and each of their respective officers and directors shall be entitled
         to rely upon each such servicing criteria assessment.

                  (ii) The Servicer shall deliver to the Trustee, and the
         Trustee shall provide on its own behalf, a report of a registered
         public accounting firm reasonably acceptable to the Trustee that
         attests to, and reports on, the assessment of compliance made by
         Servicer or the Trustee, as applicable, and delivered pursuant to the
         preceding paragraphs. Such attestation shall be in accordance with
         Rules 1-02(a)(3) and 2-02(g) of Regulation S-X under the Securities Act
         and the Exchange Act, including, without limitation that in the event
         that an overall opinion cannot be expressed, such registered public
         accounting firm shall state in such report why it was unable to express
         such an opinion. Such report must be available for general use and not
         contain restricted use language. To the extent any of the Servicing
         Criteria are not applicable to such Person, with respect to
         asset-backed securities transactions taken as a whole involving such
         Person and that are backed by the same asset type backing the
         Certificates, such report shall include such a statement to that
         effect.

                  (iii) The Servicer shall cause each of its Reporting
         Subcontractor to deliver to the Trustee (with a copy to the Depositor)
         an assessment of compliance and accountant's attestation as and when
         provided in paragraphs (a) and (b) of this Section 11.07.

                  (iv) The Trustee shall cause each of its Reporting
         Subcontractor to deliver to the Trustee and the Servicer (with a copy
         to the Depositor) an assessment of compliance and accountant's
         attestation as and when provided in paragraphs (a) and (b) of this
         Section.

                  (v) The Servicer shall execute (and the Servicer shall cause
         each Reporting Subcontractor to execute) a reliance certificate to
         enable the Certification Parties to rely upon each (A) annual
         compliance statement provided pursuant to Section 3.17, (B) annual
         report on assessments of compliance with servicing criteria provided
         pursuant to this Section 11.07 and (C) accountant's report provided
         pursuant to this Section 11.07 and shall include a certification that
         each such annual compliance statement or report discloses any
         deficiencies or defaults described

                                      118
<PAGE>

         to the registered public accountants of such Person to enable such
         accountants to render the certificates provided for in this Section
         11.07.

                  (vi) The Trustee shall execute (and the Trustee shall cause
         each Reporting Subcontractor to execute) a reliance certificate to
         enable the Certification Parties to rely upon each (A) annual report on
         assessments of compliance with servicing criteria provided pursuant to
         this Section 11.07 and (C) accountant's report provided pursuant to
         this Section 11.07 and shall include a certification that each such
         report discloses any deficiencies or defaults described to the
         registered public accountants of such Person to enable such accountants
         to render the certificates provided for in this Section 11.07.

         (b) In the event the Servicer, the Trustee or Reporting Subcontractor
is terminated or resigns during the term of this Agreement, such Person shall
provide documents and information required by this Section 11.07 with respect to
the period of time it was subject to this Agreement or provided services with
respect to the Trust Fund, the Certificates or the Mortgage Loans.

         (c) An assessment of compliance provided by a Subcontractor pursuant to
Section 11.07(a)(iii) or (iv) need not address any elements of the Servicing
Criteria other than those specified by the Servicer or the Trustee, as
applicable, pursuant to Section 11.07(a)(i).

         Section 11.08 Use of Subcontractors.

         (a)  [Reserved].

         (b) It shall not be necessary for the Servicer or the Trustee to seek
the consent of the Depositor or any other party hereto to the utilization of any
Subcontractor. The Servicer or the Trustee, as applicable, shall promptly upon
request provide to the Trustee and the Depositor (or any designee of the
Depositor, such as the Servicer or administrator) a written description (in form
and substance satisfactory to the Depositor) of the role and function of each
Subcontractor utilized by such Person, specifying (i) the identity of each such
Subcontractor, (ii) which (if any) of such Subcontractors are "participating in
the servicing function" within the meaning of Item 1122 of Regulation AB, and
(iii) which elements of the Servicing Criteria will be addressed in assessments
of compliance provided by each Subcontractor identified pursuant to clause (ii)
of this paragraph.

         As a condition to the utilization of any Subcontractor determined to be
a Reporting Subcontractor, the Servicer or the Trustee, as applicable, shall
cause any such Subcontractor used by such Person for the benefit of the
Depositor to comply with the provisions of Sections 11.07 and 11.09 of this
Agreement to the same extent as if such Subcontractor were the Servicer (except
with respect to the Servicer's duties with respect to preparing and filing any
Exchange Act Reports or as the Certifying Person) or the Trustee, as applicable.
The Servicer or the Trustee, as applicable, shall be responsible for obtaining
from each Subcontractor and delivering to the Trustee and the Servicer, any
assessment of compliance and attestation required to be delivered by such
Subcontractor under Section 11.05 and Section 11.07, in each case as and when
required to be delivered.

         Section 11.09 Amendments.

         In the event the parties to this Agreement desire to further clarify or
amend any provision of this Article 11, this Agreement shall be amended to
reflect the new agreement between the parties covering matters in this Article
11 pursuant to Section 10.01, which amendment shall not require any Opinion of
Counsel or Rating Agency confirmations or the consent of any Certificateholder.

                                      119
<PAGE>

         If, during the period that the Depositor is required to file Exchange
Act Reports with respect to the Trust Fund, the Servicer is no longer an
Affiliate of the Depositor, the Depositor shall assume the obligations and
responsibilities of the Servicer in this Article 11 with respect to the
preparation and filing of the Exchange Act Reports and/or acting as the
Certifying Person, if the Depositor has received indemnity from such successor
Servicer satisfactory to the Depositor, and such Servicer has agreed to provide
a Sarbanes-Oxley Certification to the Depositor substantially in the form of
Exhibit U.

                                   * * * * * *

                                      120
<PAGE>

         IN WITNESS WHEREOF, the Depositor, the Trustee, the Supplemental
Interest Trustee, and the Seller and Servicer have caused their names to be
signed hereto by their respective officers thereunto duly authorized as of the
day and year first above written.

                                INDYMAC MBS, INC.
                                     as Depositor

                                By: /s/ Jill Jacobson
                                    ----------------------------------------
                                         Name:   Jill Jacobson
                                         Title:  Vice President

                                DEUTSCHE BANK NATIONAL TRUST COMPANY,
                                    as Trustee and Supplemental Interest Trustee

                                By: /s/ Jennifer Hermansader
                                   -----------------------------------------
                                         Name:  Jennifer Hermansader
                                         Title: Associate

                                By: /s/ Marion Hogan
                                   -----------------------------------------
                                         Name:  Marion Hogan
                                         Title: Associate

                                INDYMAC BANK, F.S.B.
                                     as Seller and Servicer

                                By: /s/ Jill Jacobson
                                    ----------------------------------------
                                         Name:   Jill Jacobson
                                         Title:  Vice President

<PAGE>

STATE OF CALIFORNIA        )
                           : ss.:
COUNTY OF Los Angeles      )

         On this 28th day of November, 2007, before me, personally appeared
Jill Jacobson, known to me to be a Vice President of IndyMac MBS, Inc., one of
the entities that executed the within instrument, and also known to me to be the
person who executed it on behalf of said entity, and acknowledged to me that
such entity executed the within instrument.

         IN WITNESS WHEREOF, I have hereunto set my hand and affixed my official
seal the day and year in this certificate first above written.

                                                /s/ Evan Fitzsimon
                                                ---------------------------
                                                Notary Public

[NOTARIAL SEAL]

                                       1

<PAGE>
STATE OF CALIFORNIA        )
                           : ss.:
COUNTY OF Orange           )

         On this 28th day of November, 2007, before me, personally appeared
Jennifer Hermansader and Marion Hogan, known to me to be an Associate and an
Associate, respectively, of Deutsche Bank National Trust Company, one of the
entities that executed the within instrument, and also known to me to be the
person who executed it on behalf of said entity, and acknowledged to me that
such entity executed the within instrument.

         IN WITNESS WHEREOF, I have hereunto set my hand and affixed my official
seal the day and year in this certificate first above written.

                                                /s/ Cindy Lai
                                                ---------------------------
                                                Notary Public

[NOTARIAL SEAL]

                                       2

<PAGE>

STATE OF CALIFORNIA        )
                           : ss.:
COUNTY OF Los Angeles      )

         On this 28th day of November, 2007, before me, personally appeared
Jill Jacobson, known to me to be a Vice President of IndyMac Bank, F.S.B., one
of the entities that executed the within instrument, and also known to me to be
the person who executed it on behalf of said entity, and acknowledged to me that
such entity executed the within instrument.

         IN WITNESS WHEREOF, I have hereunto set my hand and affixed my official
seal the day and year in this certificate first above written.

                                                /s/ Evan Fitzsimon
                                                ---------------------------
                                                Notary Public

[NOTARIAL SEAL]

                                       3
<PAGE>

                                   Schedule I

            MORTGAGE LOAN SCHEDULE [DELIVERED AT CLOSING TO TRUSTEE]

                                      S-I-1

<PAGE>

                                   Schedule II

      INDYMAC MBS, INC. MORTGAGE PASS-THROUGH CERTIFICATES, SERIES 2007-AR8

              Representations and Warranties of the Seller/Servicer

         Indy Mac Bank, F.S.B. ("IndyMac") hereby makes the representations and
warranties set forth in this Schedule II to the Depositor and the Trustee, as of
the Closing Date. Capitalized terms used but not otherwise defined in this
Schedule II shall have the meanings assigned thereto in the Pooling and
Servicing Agreement (the "Pooling and Servicing Agreement") relating to the
above-referenced Series, among IndyMac, as seller and servicer, IndyMac MBS,
Inc., as depositor, and Deutsche Bank National Trust Company, as trustee and as
supplemental interest trustee.

                  (1) IndyMac is duly organized as a federally insured savings
         bank and is validly existing and in good standing under the laws of the
         United States of America and is duly authorized and qualified to
         transact any business contemplated by the Pooling and Servicing
         Agreement to be conducted by IndyMac in any state in which a Mortgaged
         Property is located or is otherwise not required under applicable law
         to effect such qualification and, in any event, is in compliance with
         the doing business laws of any such state, to the extent necessary to
         ensure its ability to enforce each Mortgage Loan, to service the
         Mortgage Loans in accordance with the Pooling and Servicing Agreement
         and to perform any of its other obligations under the Pooling and
         Servicing Agreement in accordance with the terms thereof.

                  (2) IndyMac has the full corporate power and authority to sell
         and service each Mortgage Loan, and to execute, deliver and perform,
         and to enter into and consummate the transactions contemplated by the
         Pooling and Servicing Agreement and has duly authorized by all
         necessary corporate action on the part of IndyMac the execution,
         delivery and performance of the Pooling and Servicing Agreement; and
         the Pooling and Servicing Agreement, assuming the due authorization,
         execution and delivery thereof by the other parties thereto,
         constitutes a legal, valid and binding obligation of IndyMac,
         enforceable against IndyMac in accordance with its terms, except that
         (a) the enforceability thereof may be limited by bankruptcy,
         insolvency, moratorium, receivership and other similar laws relating to
         creditors' rights generally and (b) the remedy of specific performance
         and injunctive and other forms of equitable relief may be subject to
         equitable defenses and to the discretion of the court before which any
         proceeding therefor may be brought.

                  (3) The execution and delivery of the Pooling and Servicing
         Agreement by IndyMac, the sale and servicing of the Mortgage Loans by
         IndyMac under the Pooling and Servicing Agreement, the consummation of
         any other of the transactions contemplated by the Pooling and Servicing
         Agreement, and the fulfillment of or compliance with the terms thereof
         are in the ordinary course of business of IndyMac and will not (A)
         result in a material breach of any term or provision of the charter or
         by-laws of IndyMac or (B) materially conflict with, result in a
         material breach, violation or acceleration of, or result in a material
         default under, any other material agreement or instrument to which
         IndyMac is a party or by which it may be bound, or (C) constitute a
         material violation of any statute, order or regulation applicable to
         IndyMac of any court, regulatory body, administrative agency or
         governmental body having jurisdiction over IndyMac (including the OTS,
         the Federal Deposit Insurance Corporation or any other governmental
         entity having regulatory authority over IndyMac); and IndyMac is not in
         breach or violation of any material indenture or other material
         agreement or instrument, or in violation of any statute, order or
         regulation of any court, regulatory body, administrative agency or

                                     S-II-1
<PAGE>

         governmental body having jurisdiction over it (including the OTS,
         the Federal Deposit Insurance Corporation or any other
         governmental entity having regulatory authority over IndyMac) which
         breach or violation may materially impair IndyMac's ability to perform
         or meet any of its obligations under the Pooling and Servicing
         Agreement.

                  (4) IndyMac is an approved servicer of conventional mortgage
         loans for FNMA or FHLMC or is a mortgagee approved by the Secretary of
         Housing and Urban Development pursuant to Sections 203 and 211 of the
         National Housing Act.

                  (5) No litigation is pending or, to the best of IndyMac's
         knowledge, threatened against IndyMac that would prohibit the execution
         or delivery of, or performance under, the Pooling and Servicing
         Agreement by IndyMac.

                  (6) IndyMac is a member of MERS in good standing, and will
         comply in all material respects with the rules and procedures of MERS
         in connection with the servicing of the MERS Mortgage Loans for as long
         as such Mortgage Loans are registered with MERS.

                                     S-II-2
<PAGE>

                                  Schedule III

                                INDYMAC MBS, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES,
                                 SERIES 2007-AR8

             Representations and Warranties as to the Mortgage Loans

         IndyMac Bank, F.S.B. ("IndyMac") hereby makes the representations and
warranties set forth in this Schedule III to the Depositor and the Trustee, as
of the Closing Date or if so specified in this Schedule III, as of the Cut-off
Date with respect to each Mortgage Loan. Capitalized terms used but not
otherwise defined in this Schedule III shall have the meanings assigned to them
in the Pooling and Servicing Agreement (the "Pooling and Servicing Agreement")
relating to the above-referenced Series, among IndyMac, as seller and servicer,
IndyMac MBS, Inc., as depositor, and Deutsche Bank National Trust Company, as
trustee and as supplemental interest trustee.

                  (1) The information set forth on Schedule I to the Pooling and
         Servicing Agreement with respect to each Mortgage Loan is true and
         correct in all material respects as of the Closing Date.

                  (2) All regularly scheduled monthly payments due with respect
         to each Mortgage Loan up to and including the Due Date before the
         Cut-off Date have been made; and as of the Cut-off Date, no Mortgage
         Loan had a regularly scheduled monthly payment that was 60 or more days
         Delinquent during the twelve months before the Cut-off Date.

                  (3) With respect to any Mortgage Loan that is not a
         Cooperative Loan, each Mortgage is a valid and enforceable first lien
         on the Mortgaged Property subject only to (a) the lien of nondelinquent
         current real property taxes and assessments and liens or interests
         arising under or as a result of any federal, state or local law,
         regulation or ordinance relating to hazardous wastes or hazardous
         substances and, if the related Mortgaged Property is a unit in a
         condominium project or planned unit development, any lien for common
         charges permitted by statute or homeowner association fees, (b)
         covenants, conditions and restrictions, rights of way, easements and
         other matters of public record as of the date of recording of such
         Mortgage, such exceptions appearing of record being generally
         acceptable to mortgage lending institutions in the area wherein the
         related Mortgaged Property is located or specifically reflected in the
         appraisal made in connection with the origination of the related
         Mortgage Loan, and (c) other matters to which like properties are
         commonly subject which do not materially interfere with the benefits of
         the security intended to be provided by such Mortgage.

                  (4) Immediately before the assignment of the Mortgage Loans to
         the Depositor, the Seller had good title to, and was the sole owner of,
         each Mortgage Loan free and clear of any pledge, lien, encumbrance or
         security interest and had full right and authority, subject to no
         interest or participation of, or agreement with, any other party, to
         sell and assign the same pursuant to the Pooling and Servicing
         Agreement.

                  (5) As of the Closing Date, there was no delinquent tax or
         assessment lien against the related Mortgaged Property.

                  (6) There is no valid offset, defense or counterclaim to any
         Mortgage Note or Mortgage, including the obligation of the Mortgagor to
         pay the unpaid principal of or interest on such Mortgage Note.

                                     S-III-1
<PAGE>

                  (7) There are no mechanics' liens or claims for work, labor or
         material affecting any Mortgaged Property which are or may be a lien
         prior to or equal with, the lien of such Mortgage, except those which
         are insured against by the title insurance policy referred to in item
         (11) below.

                  (8) No Mortgaged Property has been materially damaged by
         water, fire, earthquake, windstorm, flood, tornado or similar casualty
         (excluding casualty from the presence of hazardous wastes or hazardous
         substances, as to which the Seller makes no representation) so as to
         affect adversely the value of the related Mortgaged Property as
         security for the Mortgage Loan.

                  (9) Each Mortgage Loan at origination complied in all material
         respects with applicable local, state and federal laws and regulations,
         including usury, equal credit opportunity, real estate settlement
         procedures, truth-in-lending, and disclosure laws, or any noncompliance
         does not have a material adverse effect on the value of the related
         Mortgage Loan.

                  (10) The Seller has not modified the Mortgage in any material
         respect (except that a Mortgage Loan may have been modified by a
         written instrument which has been recorded or submitted for
         recordation, if necessary, to protect the interests of the
         Certificateholders and which has been delivered to the Trustee);
         satisfied, cancelled or subordinated such Mortgage in whole or in part;
         released the related Mortgaged Property in whole or in part from the
         lien of such Mortgage; or executed any instrument of release,
         cancellation, modification or satisfaction with respect thereto.

                  (11) A lender's policy of title insurance together with a
         condominium endorsement and extended coverage endorsement, if
         applicable, in an amount at least equal to the Cut-off Date Principal
         Balance of each such Mortgage Loan or a commitment (binder) to issue
         the same was effective on the date of the origination of each Mortgage
         Loan and each such policy is valid and remains in full force and
         effect.

                  (12) Each Mortgage Loan was originated (within the meaning of
         Section 3(a)(41) of the Securities Exchange Act of 1934, as amended) by
         an entity that satisfied at the time of origination the requirements of
         Section 3(a)(41) of the Securities Exchange Act of 1934, as amended.

                  (13) All of the improvements which were included for the
         purpose of determining the Appraised Value of the Mortgaged Property
         lie wholly within the boundaries and building restriction lines of such
         property, and no improvements on adjoining properties encroach upon the
         Mortgaged Property, unless such failure to be wholly within such
         boundaries and restriction lines or such encroachment, as the case may
         be, does not have a material effect on the value of the Mortgaged
         Property.

                  (14) As of the date of origination of each Mortgage Loan, no
         improvement located on or being part of the Mortgaged Property is in
         violation of any applicable zoning law or regulation unless such
         violation would not have a material adverse effect on the value of the
         related Mortgaged Property. All inspections, licenses and certificates
         required to be made or issued with respect to all occupied portions of
         the Mortgaged Property and, with respect to the use and occupancy of
         the same, including certificates of occupancy and fire underwriting
         certificates, have been made or obtained from the appropriate
         authorities, unless the lack thereof would not have a material adverse
         effect on the value of the Mortgaged Property.

                  (15) The Mortgage Note and the related Mortgage are genuine,
         and each is the legal, valid and binding obligation of the maker
         thereof, enforceable in accordance with its terms and under applicable
         law.

                                     S-III-2
<PAGE>

                  (16) The proceeds of the Mortgage Loan have been fully
         disbursed and there is no requirement for future advances thereunder.

                  (17) The related Mortgage contains customary and enforceable
         provisions which render the rights and remedies of the holder thereof
         adequate for the realization against the Mortgaged Property of the
         benefits of the security, including, (i) in the case of a Mortgage
         designated as a deed of trust, by trustee's sale, and (ii) otherwise by
         judicial foreclosure.

                  (18) With respect to each Mortgage constituting a deed of
         trust, a trustee, duly qualified under applicable law to serve as such,
         has been properly designated and currently so serves and is named in
         such Mortgage, and no fees or expenses are or will become payable by
         the Certificateholders to the trustee under the deed of trust, except
         in connection with a trustee's sale after default by the Mortgagor.

                  (19) At the Closing Date, the improvements upon each Mortgaged
         Property are covered by a valid and existing hazard insurance policy
         with a generally acceptable carrier that provides for fire and extended
         coverage and coverage for such other hazards as are customarily
         required by institutional single family mortgage lenders in the area
         where the Mortgaged Property is located, and the Seller has received no
         notice that any premiums due and payable thereon have not been paid;
         the Mortgage obligates the Mortgagor thereunder to maintain all such
         insurance including flood insurance at the Mortgagor's cost and
         expense. Anything to the contrary in this item (19) notwithstanding, no
         breach of this item (19) shall be deemed to give rise to any obligation
         of the Seller to repurchase or substitute for such affected Mortgage
         Loan or Loans so long as the Servicer maintains a blanket policy
         pursuant to the second paragraph of Section 3.10(a) of the Pooling and
         Servicing Agreement.

                  (20) If at the time of origination of each Mortgage Loan, the
         related Mortgaged Property was in an area then identified in the
         Federal Register by the Federal Emergency Management Agency as having
         special flood hazards, a flood insurance policy in a form meeting the
         then-current requirements of the Flood Insurance Administration is in
         effect with respect to the Mortgaged Property with a generally
         acceptable carrier.

                  (21) There is no proceeding pending or threatened for the
         total or partial condemnation of any Mortgaged Property, nor is such a
         proceeding currently occurring.

                  (22) There is no material event which, with the passage of
         time or with notice and the expiration of any grace or cure period,
         would constitute a material non-monetary default, breach, violation or
         event of acceleration under the Mortgage or the related Mortgage Note;
         and the Seller has not waived any material non-monetary default,
         breach, violation or event of acceleration.

                  (23) Each Mortgage File contains an appraisal of the related
         Mortgaged Property prepared in accordance with the Uniform Standards of
         Professional Appraisal Practice (USPAP).

                  (24) Any leasehold estate securing a Mortgage Loan has a
         stated term of not less than five years in excess of the term of the
         related Mortgage Loan.

                  (25) Each Mortgage Loan was selected from among the
         outstanding adjustable rate one- to four-family mortgage loans in the
         Seller's portfolio at the Closing Date as to which the representations
         and warranties made with respect to the Mortgage Loans set forth in
         this Schedule III can be made. No such selection was made in a manner
         intended to adversely affect the interests of the Certificateholders.

                                     S-III-3
<PAGE>

                  (26) No more than 0.74% of the Group 1 Mortgage Loans, 1.68%
         of the Group 2 Mortgage Loans and 1.97% of the Group 3 Mortgage Loan
         are Cooperative Loans.

                  (27) None of the Mortgage Loans is a "high cost" loan,
         "covered" loan or any other similarly designated loan as defined under
         any state, local or federal law, as defined by applicable predatory and
         abusive lending laws.

                  (28) No proceeds from any Mortgage Loan underlying the
         Certificates were used to finance single-premium credit insurance
         policies.

                  (29) None of the Mortgage Notes related to the Mortgage Loans
         impose a Prepayment Charge on the related Mortgage Loan for a term in
         excess of three years from the origination of the Mortgage Loan.

                  (30) Each Mortgage Loan was in compliance with the
         anti-predatory lending eligibility for purchase requirements of Fannie
         Mae's Selling Guide.

                  (31) Each Mortgage Loan has been underwritten and serviced
         substantially in accordance with the Seller's guidelines, subject to
         such variances as are reflected on the Mortgage Loan Schedule or that
         the Seller has approved.

                  (32) No Mortgage Loan is a High Cost Loan or Covered Loan, as
         applicable (as such terms are defined in the then-current version of
         Standard & Poor's LEVELS(R) Glossary, which is now Version 5.7 Revised,
         Appendix E) and no Mortgage Loan originated on or after Oct. 1, 2002
         through March 6, 2003 is governed by the Georgia Fair Lending Act.

                  (33) The Pooling and Servicing Agreement creates a valid and
         continuing "security interest" (as defined in Section 1-201(37) of the
         UCC) in each Mortgage Note in favor of the Trustee, which security
         interest is prior to all other liens and is enforceable as such against
         creditors of and purchasers from the Depositor. Each Mortgage Note
         constitutes "promissory notes" (as defined in Section 9-102(a)(65) of
         the UCC). Immediately before the assignment of each Mortgage Note to
         the Trustee, the Depositor had good and marketable title to such
         Mortgage Note free and clear of any lien, claim, encumbrance of any
         Person. All original executed copies of each Mortgage Note have been or
         shall be delivered to the Trustee within five Business Days following
         the Closing Date. Other than the security interest granted to the
         Trustee, the Depositor has not pledged, assigned, sold, granted a
         security interest in, or otherwise conveyed any Mortgage Note. The
         Depositor has not authorized the filing of and is not aware of any
         financing statements against the Depositor that include a description
         of any of the Mortgage Notes. The Depositor is not aware of any
         judgment or tax liens filed against the Depositor. None of the Mortgage
         Notes has any marks or notations indicating that they have been
         pledged, assigned or otherwise conveyed to any Person other than the
         Trustee.

                  (34) To the best of the Seller's knowledge, there was no fraud
         involved in the origination of any Mortgage Loan by the mortgagee or by
         the Mortgagor, any appraiser or any other party involved in the
         origination of the Mortgage Loan.

                  (35) Each Mortgage Loan constitutes a "qualified mortgage"
         within the meaning of Section 860G(a)(3) of the Code.

                                     S-III-4
<PAGE>

                  (36) Each Mortgage Loan at the time it was made complied in
         all material respects with applicable local, state, and federal laws,
         including, but not limited to, all applicable predatory and abusive
         lending laws.

                  (37) No Mortgage Loan is subject to the requirements of the
         Home Ownership and Equity Protection Act of 1994.

                  (38) No Mortgage Loan is a "High-Cost Home Loan" as defined in
         any of the following statutes: the Georgia Fair Lending Act, as amended
         (the "Georgia Act"), the New York Banking Law 6-1, the Arkansas Home
         Loan Protection Act effective July 16, 2003 (Act 1340 of 2003), the
         Kentucky high-cost home loan statute effective June 24, 2003 (Ky. Rev.
         Stat. Section 360.100), the New Jersey Home Ownership Act effective
         November 27, 2003 (N.J.S.A. 46:10B-22 et seq.), or the New Mexico Home
         Loan Protection Act effective January 1, 2004 (N.M. Stat. Ann ss.ss.
         58-21A-1 et seq.). No Mortgage Loan subject to the Georgia Act and
         secured by owner occupied real property or an owner occupied
         manufactured home located in the state of Georgia was originated (or
         modified) on or after October 1, 2002 through and including March 6,
         2003. No Mortgage Loan is a "High-Risk Home Loan" as defined in the
         Illinois High-Risk Home Loan Act effective January 1, 2004 (815 Ill.
         Comp. Stat. 137/1 et seq.). None of the Mortgage Loans that are secured
         by property located in the State of Illinois are in violation of the
         provisions of the Illinois Interest Act (815 Ill. Comp. Stat. 205/1 et
         seq.).

                  (39) None of the Mortgage Loans is a "high cost" loan,
         "covered" loan (excluding home loans defined as "covered home loans" in
         the New Jersey Home Ownership Security Act of 2002 that were originated
         between November 26, 2003 and July 7, 2004), "high risk home" or
         "predatory" loan or any other similarly designated loan as defined
         under any state, local or federal law, as defined by applicable
         predatory and abusive lending laws.

                                     S-III-5
<PAGE>

                                   SCHEDULE IV

                                   [Reserved].

                                     S-IV-1
<PAGE>

                                   SCHEDULE V

                             FORM OF MONTHLY REPORT

                           [On File with the Trustee]

                                     S-V-1
<PAGE>

                                   EXHIBIT A

                          [FORM OF SENIOR CERTIFICATE]

         [UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE
OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), TO THE ISSUER
OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE, OR PAYMENT, AND ANY
CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME
AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE
TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED
REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER
HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.]

         SOLELY FOR U.S. FEDERAL INCOME TAX PURPOSES, THIS CERTIFICATE IS A
"REGULAR INTEREST" IN A "REAL ESTATE MORTGAGE INVESTMENT CONDUIT," AS THOSE
TERMS ARE DEFINED, RESPECTIVELY, IN SECTIONS 860G AND 860D OF THE INTERNAL
REVENUE CODE OF 1986, AS AMENDED (THE "CODE").

         [UNTIL THIS CERTIFICATE HAS BEEN THE SUBJECT OF AN ERISA-QUALIFYING
UNDERWRITING, NEITHER THIS CERTIFICATE NOR ANY INTEREST HEREIN MAY BE
TRANSFERRED UNLESS THE TRANSFEREE DELIVERS TO THE TRUSTEE EITHER A
REPRESENTATION LETTER TO THE EFFECT THAT SUCH TRANSFEREE IS NOT, AND IS NOT
INVESTING ON BEHALF OF OR WITH PLAN ASSETS OF, AN EMPLOYEE BENEFIT PLAN SUBJECT
TO THE EMPLOYEE RETIREMENT INCOME SECURITY ACT OF 1974, AS AMENDED, OR A PLAN OR
ARRANGEMENT SUBJECT TO SECTION 4975 OF THE CODE, OR AN OPINION OF COUNSEL IN
ACCORDANCE WITH THE PROVISIONS OF THE AGREEMENT REFERRED TO HEREIN.
NOTWITHSTANDING ANYTHING ELSE TO THE CONTRARY HEREIN, UNTIL THIS CERTIFICATE HAS
BEEN THE SUBJECT OF AN ERISA-QUALIFYING UNDERWRITING, ANY PURPORTED TRANSFER OF
THIS CERTIFICATE TO OR ON BEHALF OF A BENEFIT PLAN OR ARRANGEMENT SUBJECT TO
ERISA OR TO SECTION 4975 OF THE CODE WITHOUT THE OPINION OF COUNSEL SATISFACTORY
TO THE TRUSTEE AS DESCRIBED ABOVE SHALL BE VOID AND OF NO EFFECT.]

         [SO LONG AS THE SWAP CONTRACT IS IN EFFECT, NO TRANSFER OF THIS
CERTIFICATE SHALL BE MADE UNLESS THE TRUSTEE SHALL HAVE RECEIVED A
REPRESENTATION LETTER FROM THE TRANSFEREE OF THIS CERTIFICATE TO THE EFFECT THAT
EITHER (I) SUCH TRANSFEREE IS NEITHER AN EMPLOYEE BENEFIT PLAN OR OTHER
RETIREMENT ARRANGEMENT WHICH IS SUBJECT TO SECTION 406 OF THE EMPLOYEE
RETIREMENT INCOME SECURITY ACT OF 1974, AS AMENDED, AND/OR SECTION 4975 OF THE
CODE OR ANY ENTITY WHOSE UNDERLYING ASSETS INCLUDE SUCH PLAN'S OR ARRANGEMENT'S
ASSETS BY REASON OF THEIR INVESTMENT IN THE ENTITY (A "PLAN") NOR A PERSON
ACTING ON BEHALF OF ANY SUCH PLAN OR USING THE ASSETS OF ANY SUCH PLAN TO EFFECT
SUCH TRANSFER OR (II) THE ACQUISITION AND HOLDING OF THIS CERTIFICATE ARE
ELIGIBLE FOR EXEMPTIVE RELIEF UNDER PROHIBITED TRANSACTION CLASS EXEMPTION
("PTCE") 84-14, PTCE 90-1, PTCE 91-38, PTCE 95-60, PTCE 96-23 OR THE SERVICE
PROVIDER EXEMPTION PROVIDED UNDER SECTION 408(B)(17) OF ERISA AND SECTION
4975(D)(20) OF THE CODE. ANY PURPORTED TRANSFER OF THIS CERTIFICATE PRIOR TO THE
TERMINATION OF THE SUPPLEMENTAL INTEREST TRUST TO OR ON BEHALF OF A PLAN WITHOUT
THE DELIVERY TO THE TRUSTEE OF A REPRESENTATION LETTER AS DESCRIBED ABOVE SHALL
BE VOID AND OF NO EFFECT. IF THIS CERTIFICATE IS A BOOK-ENTRY CERTIFICATE, THE
TRANSFEREE WILL BE DEEMED TO HAVE MADE A REPRESENTATION AS PROVIDED IN CLAUSE
(I) OR (II) OF THIS PARAGRAPH, AS APPLICABLE.]

                                       A-1
<PAGE>

Certificate No.                       :

Cut-off  Date                         :

First Distribution Date               :

Initial Certificate Balance of
this Certificate
("Denomination")                      :           $

Initial Certificate Balances of
all Certificates of this Class        :           $

CUSIP                                 :

Interest Rate                         :           %

Maturity Date                         :

                                INDYMAC MBS, INC.
                     IndyMac INDA Mortgage Loan Trust 200_-_
                Mortgage Pass-Through Certificates, Series 200_-_
                                   Class [__]

                           evidencing a percentage interest in the distributions
                  allocable to the Certificates of the above-referenced Class
                  with respect to a Trust Fund consisting primarily of a pool of
                  conventional mortgage loans (the "Mortgage Loans") secured by
                  first liens on one- to four-family residential properties.

                         IndyMac MBS, Inc., as Depositor

         Principal in respect of this Certificate is distributable monthly as
set forth herein or in the Agreement (defined below). Accordingly, the
Certificate Balance at any time may be less than the Certificate Balance as set
forth herein. This Certificate does not evidence an obligation of, or an
interest in, and is not guaranteed by the Depositor, the Seller, the Servicer or
the Trustee referred to below or any of their respective affiliates. Neither
this Certificate nor the Mortgage Loans are guaranteed or insured by any
governmental agency or instrumentality.

         This certifies that _________________ is the registered owner of the
Percentage Interest evidenced by this Certificate (obtained by dividing the
denomination of this Certificate by the aggregate Initial Certificate Balances
of all Certificates of the Class to which this Certificate belongs) in certain
monthly distributions with respect to a Trust Fund consisting primarily of the
Mortgage Loans deposited by IndyMac MBS, Inc. (the "Depositor"). The Trust Fund
was created pursuant to a Pooling and Servicing Agreement dated as of the
Cut-off Date specified above (the "Agreement") among the Depositor, IndyMac
Bank, F.S.B., as seller (in such capacity, the "Seller") and as servicer (in
such capacity, the "Servicer"), and Deutsche Bank National Trust Company, as
trustee (the "Trustee") and as supplemental interest trustee. To the extent not
defined herein, the capitalized terms used herein have the meanings assigned in
the Agreement. This Certificate is issued under and is subject to the terms,
provisions and conditions of the Agreement, to which Agreement the Holder of
this Certificate by virtue of the acceptance hereof assents and by which such
Holder is bound.

                                       A-2
<PAGE>

         [Until this certificate has been the subject of an ERISA-Qualifying
Underwriting, no transfer of a Certificate of this Class shall be made unless
the Trustee shall have received either (i) a representation letter from the
transferee of such Certificate, acceptable to and in form and substance
satisfactory to the Trustee, to the effect that such transferee is not an
employee benefit plan subject to Section 406 of ERISA or Section 4975 of the
Code, or a person investing on behalf of or with plan assets of any such plan,
which representation letter shall not be an expense of the Trustee or the
Servicer, or (ii) in the case of any such Certificate presented for registration
in the name of an employee benefit plan subject to ERISA or Section 4975 of the
Code (or comparable provisions of any subsequent enactments), or a trustee of
any such plan or any other person acting on behalf of any such plan, an Opinion
of Counsel satisfactory to the Trustee to the effect that the purchase and
holding of such Certificate will not result in a nonexempt prohibited
transaction under Section 406 of ERISA or Section 4975 of the Code and will not
subject the Trustee or the Servicer to any obligation in addition to those
undertaken in the Agreement, which Opinion of Counsel shall not be an expense of
the Trustee, the Servicer, or the Trust Fund. Notwithstanding anything else to
the contrary herein, until this certificate has been the subject of an
ERISA-Qualifying Underwriting, any purported transfer of a Certificate of this
Class to or on behalf of an employee benefit plan subject to ERISA or to the
Code without the opinion of counsel satisfactory to the Trustee as described
above shall be void and of no effect.]

         [So long as the Swap Contract is in effect, no transfer of a LIBOR
Certificate (other than a transfer of a LIBOR Certificate to an affiliate of the
Depositor (either directly or through a nominee) in connection with the initial
issuance of the Certificates) shall be made unless the Trustee shall have
received either (i) a representation from the transferee of such LIBOR
Certificate acceptable to and in form and substance satisfactory to the Trustee
to the effect that such transferee is not a Plan, or (ii) a representation that
the purchase and holding of the LIBOR Certificate satisfy the requirements for
exemptive relief under PTCE 84-14, PTCE 90-1, PTCE 91-38, PTCE 95-60, PTCE 96-23
or the service provider exemption provided by Section 408 (b)(17) of ERISA and
Section 4975 (d)(20) of the Code or a similar exemption. In the event that such
a representation letter is not delivered, one of the foregoing representations,
as appropriate, shall be deemed to have been made by the transferee's (including
an initial acquiror's) acceptance of the LIBOR Certificate. In the event that
such representation is violated, such transfer or acquisition shall be void and
of no effect.]

         Reference is hereby made to the further provisions of this Certificate
set forth on the reverse hereof, which further provisions shall for all purposes
have the same effect as if set forth at this place.

         This Certificate shall not be entitled to any benefit under the
Agreement or be valid for any purpose unless manually countersigned by an
authorized signatory of the Trustee.

                                     A-3
<PAGE>

         IN WITNESS WHEREOF, the Trustee has caused this Certificate to be duly
executed.

Dated:  ____________, 20__

                                          DEUTSCHE BANK NATIONAL TRUST COMPANY,
                                            as Trustee

                                          By ______________________

Countersigned:

By ___________________________
   Authorized Signatory of
   DEUTSCHE BANK NATIONAL TRUST COMPANY,
   as Trustee

                                     A-4
<PAGE>

                                    EXHIBIT B

                       [FORM OF SUBORDINATED CERTIFICATE]

         [UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE
OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), TO THE ISSUER
OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE, OR PAYMENT, AND ANY
CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME
AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE
TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED
REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER
HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.]

         SOLELY FOR U.S. FEDERAL INCOME TAX PURPOSES, THIS CERTIFICATE IS A
"REGULAR INTEREST" IN A "REAL ESTATE MORTGAGE INVESTMENT CONDUIT," AS THOSE
TERMS ARE DEFINED, RESPECTIVELY, IN SECTIONS 860G AND 860D OF THE INTERNAL
REVENUE CODE OF 1986, AS AMENDED (THE "CODE").

         THIS CERTIFICATE IS SUBORDINATED IN RIGHT OF PAYMENT TO CERTAIN
CERTIFICATES AS DESCRIBED IN THE AGREEMENT REFERRED TO HEREIN.

         [THIS CERTIFICATE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF
1933, AS AMENDED (THE "ACT"). ANY RESALE OR TRANSFER OF THIS CERTIFICATE WITHOUT
REGISTRATION THEREOF UNDER THE ACT MAY ONLY BE MADE IN A TRANSACTION EXEMPTED
FROM THE REGISTRATION REQUIREMENTS OF THE ACT AND IN ACCORDANCE WITH THE
PROVISIONS OF THE AGREEMENT REFERRED TO HEREIN.]

         [UNTIL THIS CERTIFICATE HAS BEEN THE SUBJECT OF AN ERISA-QUALIFYING
UNDERWRITING, NEITHER THIS CERTIFICATE NOR ANY INTEREST HEREIN MAY BE
TRANSFERRED UNLESS THE TRANSFEREE DELIVERS TO THE TRUSTEE EITHER A
REPRESENTATION LETTER TO THE EFFECT THAT SUCH TRANSFEREE IS NOT, AND IS NOT
INVESTING ON BEHALF OF OR WITH PLAN ASSETS OF, AN EMPLOYEE BENEFIT PLAN SUBJECT
TO THE EMPLOYEE RETIREMENT INCOME SECURITY ACT OF 1974, AS AMENDED, OR A PLAN OR
ARRANGEMENT SUBJECT TO SECTION 4975 OF THE CODE, OR AN OPINION OF COUNSEL IN
ACCORDANCE WITH THE PROVISIONS OF THE AGREEMENT REFERRED TO HEREIN.
NOTWITHSTANDING ANYTHING ELSE TO THE CONTRARY HEREIN, UNTIL THIS CERTIFICATE HAS
BEEN THE SUBJECT OF AN ERISA-QUALIFYING UNDERWRITING, ANY PURPORTED TRANSFER OF
THIS CERTIFICATE TO OR ON BEHALF OF A BENEFIT PLAN OR ARRANGEMENT SUBJECT TO
ERISA OR TO SECTION 4975 OF THE CODE WITHOUT THE OPINION OF COUNSEL SATISFACTORY
TO THE TRUSTEE AS DESCRIBED ABOVE SHALL BE VOID AND OF NO EFFECT.]

         [NEITHER THIS CERTIFICATE NOR ANY INTEREST HEREIN MAY BE TRANSFERRED
UNLESS THE TRANSFEREE REPRESENTS TO THE TRUSTEE THAT SUCH TRANSFEREE IS NOT AND
IS NOT INVESTING ON BEHALF OF OR WITH PLAN ASSETS OF AN EMPLOYEE BENEFIT PLAN
SUBJECT TO THE EMPLOYEE RETIREMENT INCOME SECURITY ACT OF 1974, AS AMENDED
("ERISA"), OR A PLAN SUBJECT TO SECTION 4975 OF THE CODE, OR, IF THE CERTIFICATE
HAS BEEN THE SUBJECT OF AN ERISA-QUALIFYING UNDERWRITING,

                                      B-1
<PAGE>

DELIVERS A REPRESENTATION IN ACCORDANCE WITH THE PROVISIONS OF THE AGREEMENT
REFERRED TO HEREIN, OR DELIVERS TO THE TRUSTEE AN OPINION OF COUNSEL IN
ACCORDANCE WITH THE PROVISIONS OF THE AGREEMENT REFERRED TO HEREIN.
NOTWITHSTANDING ANYTHING ELSE TO THE CONTRARY HEREIN, ANY PURPORTED TRANSFER OF
THIS CERTIFICATE TO OR ON BEHALF OF AN EMPLOYEE BENEFIT PLAN SUBJECT TO ERISA OR
TO SECTION 4975 OF THE CODE WITHOUT THE OPINION OF COUNSEL SATISFACTORY TO THE
TRUSTEE AS DESCRIBED ABOVE SHALL BE VOID AND OF NO EFFECT.]

                                      B-2
<PAGE>

Certificate No.                       :

Cut-off  Date                         :

First Distribution Date               :

Initial Certificate Balance of
this Certificate
("Denomination")                      :           $

Initial Certificate Balances of
all Certificates of this Class        :           $

CUSIP                                 :

                                INDYMAC MBS, INC.
                     IndyMac INDA Mortgage Loan Trust 200_-_
                Mortgage Pass-Through Certificates, Series 200_-_
                                   Class [___]

                           evidencing a percentage interest in the distributions
                  allocable to the Certificates of the above-referenced Class
                  with respect to a Trust Fund consisting primarily of a pool of
                  conventional mortgage loans (the "Mortgage Loans") secured by
                  first liens on one- to four-family residential properties.

                         IndyMac MBS, Inc., as Depositor

Principal in respect of this Certificate is distributable monthly as set forth
herein or in the Agreement (defined below). Accordingly, the Certificate Balance
at any time may be less than the Certificate Balance as set forth herein. This
Certificate does not evidence an obligation of, or an interest in, and is not
guaranteed by the Depositor, the Seller, the Servicer or the Trustee referred to
below or any of their respective affiliates. Neither this Certificate nor the
Mortgage Loans are guaranteed or insured by any governmental agency or
instrumentality.

This certifies that ____________________ is the registered owner of the
Percentage Interest evidenced by this Certificate (obtained by dividing the
denomination of this Certificate by the aggregate Initial Certificate Balances
of the denominations of all Certificates of the Class to which this Certificate
belongs) in certain monthly distributions with respect to a Trust Fund
consisting primarily of the Mortgage Loans deposited by IndyMac MBS, Inc. (the
"Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing
Agreement dated as of the Cut-off Date specified above (the "Agreement") among
the Depositor, IndyMac Bank, F.S.B., as seller (in such capacity, the "Seller"),
and as servicer (in such capacity, the "Servicer"), and Deutsche Bank National
Trust Company, as trustee (the "Trustee") and as supplemental interest trustee.
To the extent not defined herein, the capitalized terms used herein have the
meanings assigned in the Agreement. This Certificate is issued under and is
subject to the terms, provisions and conditions of the Agreement, to which
Agreement the Holder of this Certificate by virtue of the acceptance hereof
assents and by which such Holder is bound.

[No transfer of a Certificate of this Class shall be made unless such transfer
is made pursuant to an effective registration statement under the Securities Act
and any applicable state securities laws or is

                                      B-3
<PAGE>

exempt from the registration requirements under said Act and such laws. In the
event that a transfer is to be made in reliance upon an exemption from the
Securities Act and such laws, in order to assure compliance with the Securities
Act and such laws, the Certificateholder desiring to effect such transfer and
such Certificateholder's prospective transferee shall each certify to the
Trustee in writing the facts surrounding the transfer. In the event that such a
transfer is to be made within three years from the date of the initial issuance
of Certificates pursuant hereto, there shall also be delivered (except in the
case of a transfer pursuant to Rule 144A of the Securities Act) to the Trustee
an Opinion of Counsel that such transfer may be made pursuant to an exemption
from the Securities Act and such state securities laws, which Opinion of Counsel
shall not be obtained at the expense of the Trustee, the Seller, the Servicer or
the Depositor. The Holder hereof desiring to effect such transfer shall, and
does hereby agree to, indemnify the Trustee and the Depositor against any
liability that may result if the transfer is not so exempt or is not made in
accordance with such federal and state laws.]

[Until this certificate has been the subject of an ERISA-Qualifying
Underwriting, no transfer of a Certificate of this Class shall be made unless
the Trustee shall have received either (i) a representation letter from the
transferee of such Certificate, acceptable to and in form and substance
satisfactory to the Trustee, to the effect that such transferee is not an
employee benefit plan subject to Section 406 of ERISA or Section 4975 of the
Code, or a person investing on behalf of or with plan assets of any such plan,
which representation letter shall not be an expense of the Trustee or the
Servicer, or (ii) in the case of any such Certificate presented for registration
in the name of an employee benefit plan subject to ERISA or Section 4975 of the
Code (or comparable provisions of any subsequent enactments), or a trustee of
any such plan or any other person acting on behalf of any such plan, an Opinion
of Counsel satisfactory to the Trustee to the effect that the purchase and
holding of such Certificate will not result in a nonexempt prohibited
transaction under Section 406 of ERISA or Section 4975 of the Code and will not
subject the Trustee or the Servicer to any obligation in addition to those
undertaken in the Agreement, which Opinion of Counsel shall not be an expense of
the Trustee, the Servicer, or the Trust Fund. Notwithstanding anything else to
the contrary herein, until this certificate has been the subject of an
ERISA-Qualifying Underwriting, any purported transfer of a Certificate of this
Class to or on behalf of an employee benefit plan subject to ERISA or to the
Code without the opinion of counsel satisfactory to the Trustee as described
above shall be void and of no effect.]

[No transfer of a Certificate of this Class shall be made unless the Trustee
shall have received either (i) a representation [letter] from the transferee of
such Certificate, acceptable to and in form and substance satisfactory to the
Trustee, to the effect that such transferee is not an employee benefit plan or
other benefit plan subject to Section 406 of ERISA or Section 4975 of the Code,
or a person acting on behalf of or investing plan assets of any such plan, which
representation letter shall not be an expense of the Trustee or the Servicer,
(ii) if the purchaser is an insurance company and the Certificate has been the
subject of an ERISA-Qualifying Underwriting, a representation that the purchaser
is an insurance company which is purchasing such Certificates with funds
contained in an "insurance company general account" (as such term is defined in
Section V(e) of Prohibited Transaction Class Exemption 95-60 ("PTCE 95-60")) and
that the purchase and holding of such Certificates are covered under Sections I
and III of PTCE 95-60 or (iii) in the case of any such Certificate presented for
registration in the name of an employee benefit plan subject to ERISA or Section
4975 of the Code (or comparable provisions of any subsequent enactments), or a
trustee of any such plan or any other person acting on behalf of any such plan,
an Opinion of Counsel satisfactory to the Trustee to the effect that the
purchase or holding of such Certificate will not result in a nonexempt
prohibited transaction under ERISA or Section 4975 of the Code and will not
subject the Trustee or the Servicer to any obligation in addition to those
undertaken in the Agreement, which Opinion of Counsel shall not be an expense of
the Trustee, the Servicer or the Trust Fund. Notwithstanding anything else to
the contrary herein, any purported transfer of a Certificate of this Class to or
on behalf of an employee benefit plan subject to ERISA or to Section 4975 of the
Code

                                      B-4
<PAGE>

without the opinion of counsel satisfactory to the Trustee as described above
shall be void and of no effect.]

Reference is hereby made to the further provisions of this Certificate set forth
on the reverse hereof, which further provisions shall for all purposes have the
same effect as if set forth at this place.

This Certificate shall not be entitled to any benefit under the Agreement or be
valid for any purpose unless manually countersigned by an authorized signatory
of the Trustee.

                                      B-5
<PAGE>

         IN WITNESS WHEREOF, the Trustee has caused this Certificate to be duly
executed.

Dated:  ____________, 20__

                                          DEUTSCHE BANK NATIONAL TRUST COMPANY,
                                            as Trustee

                                          By ______________________

Countersigned:

By ___________________________
   Authorized Signatory of
   DEUTSCHE BANK NATIONAL TRUST COMPANY,
   as Trustee

                                      B-6
<PAGE>

                                   EXHIBIT C

                         [FORM OF CLASS A-R CERTIFICATE]

         SOLELY FOR U.S. FEDERAL INCOME TAX PURPOSES, THIS CERTIFICATE IS A
"RESIDUAL INTEREST" IN A "REAL ESTATE MORTGAGE INVESTMENT CONDUIT," AS THOSE
TERMS ARE DEFINED, RESPECTIVELY, IN SECTIONS 860G AND 860D OF THE INTERNAL
REVENUE CODE OF 1986, AS AMENDED (THE "CODE").

         NEITHER THIS CERTIFICATE NOR ANY INTEREST HEREIN MAY BE TRANSFERRED
UNLESS THE PROPOSED TRANSFEREE DELIVERS TO THE TRUSTEE A TRANSFER AFFIDAVIT IN
ACCORDANCE WITH THE PROVISIONS OF THE AGREEMENT REFERRED TO HEREIN.

         NEITHER THIS CERTIFICATE NOR ANY INTEREST HEREIN MAY BE TRANSFERRED
UNLESS THE TRANSFEREE REPRESENTS TO THE TRUSTEE THAT SUCH TRANSFEREE IS NOT AND
IS NOT INVESTING ON BEHALF OF OR WITH PLAN ASSETS OF AN EMPLOYEE BENEFIT PLAN
SUBJECT TO THE EMPLOYEE RETIREMENT INCOME SECURITY ACT OF 1974, AS AMENDED
("ERISA"), OR A PLAN SUBJECT TO SECTION 4975 OF THE CODE, OR, IF SUCH TRANSFEREE
IS AN INSURANCE COMPANY, DELIVERS A REPRESENTATION IN ACCORDANCE WITH THE
PROVISIONS OF THE AGREEMENT REFERRED TO HEREIN, OR DELIVERS TO THE TRUSTEE AN
OPINION OF COUNSEL IN ACCORDANCE WITH THE PROVISIONS OF THE AGREEMENT REFERRED
TO HEREIN. NOTWITHSTANDING ANYTHING ELSE TO THE CONTRARY HEREIN, ANY PURPORTED
TRANSFER OF THIS CERTIFICATE TO OR ON BEHALF OF AN EMPLOYEE BENEFIT PLAN SUBJECT
TO ERISA OR TO SECTION 4975 OF THE CODE WITHOUT THE OPINION OF COUNSEL
SATISFACTORY TO THE TRUSTEE AS DESCRIBED ABOVE SHALL BE VOID AND OF NO EFFECT.

                                      C-1
<PAGE>

Certificate No.                       :

Cut-off  Date                         :

First Distribution Date               :

Initial Certificate Balance of
this Certificate
("Denomination")                      :           $

Initial Certificate Balances of
all Certificates of this Class        :           $

CUSIP                                 :

                                INDYMAC MBS, INC.
                     IndyMac INDA Mortgage Loan Trust 200_-_
                Mortgage Pass-Through Certificates, Series 200_-_

                           evidencing the distributions allocable to the Class
                  A-R Certificates with respect to a Trust Fund consisting
                  primarily of a pool of conventional mortgage loans (the
                  "Mortgage Loans") secured by first liens on one- to
                  four-family residential properties.

                         IndyMac MBS, Inc., as Depositor

Principal in respect of this Certificate is distributable monthly as set forth
herein or in the Agreement (defined below). Accordingly, the Certificate Balance
at any time may be less than the Certificate Balance as set forth herein. This
Certificate does not evidence an obligation of, or an interest in, and is not
guaranteed by the Depositor, the Seller, the Servicer or the Trustee referred to
below or any of their respective affiliates. Neither this Certificate nor the
Mortgage Loans are guaranteed or insured by any governmental agency or
instrumentality.

This certifies that _______________ is the registered owner of the Percentage
Interest (obtained by dividing the denomination of this Certificate by the
aggregate Initial Certificate Balances of the denominations of all Certificates
of the Class to which this Certificate belongs) in certain monthly distributions
with respect to a Trust Fund consisting of the Mortgage Loans deposited by
IndyMac MBS, Inc. (the "Depositor"). The Trust Fund was created pursuant to a
Pooling and Servicing Agreement dated as of the Cut-off Date specified above
(the "Agreement") among the Depositor, IndyMac Bank, F.S.B., as seller (in such
capacity, the "Seller") and as servicer (in such capacity, the "Servicer"), and
Deutsche Bank National Trust Company, as trustee (the "Trustee") and as
supplemental interest trustee. To the extent not defined herein, the capitalized
terms used herein have the meanings assigned in the Agreement. This Certificate
is issued under and is subject to the terms, provisions and conditions of the
Agreement, to which Agreement the Holder of this Certificate by virtue of the
acceptance hereof assents and by which such Holder is bound.

Any distribution of the proceeds of any remaining assets of the Trust Fund will
be made only upon presentment and surrender of this Class A-R Certificate at the
Corporate Trust Office.

                                      C-2
<PAGE>

No transfer of a Class A-R Certificate shall be made unless the Trustee shall
have received either (i) a representation letter from the transferee of such
Certificate, acceptable to and in form and substance satisfactory to the
Trustee, to the effect that such transferee is not an employee benefit plan
subject to Section 406 of ERISA or Section 4975 of the Code, nor a person
investing on behalf of or with plan assets of any such plan, which
representation letter shall not be an expense of the Trustee or the Servicer,
(ii) if the purchaser is an insurance company, a representation that the
purchaser is an insurance company which is purchasing such Certificate with
funds contained in an "insurance company general account" (as such term is
defined in Section V(e) of Prohibited Transaction Class Exemption 95-60 ("PTCE
95-60")) and that the purchase and holding of such Certificate are covered under
Sections I and III of PTCE 95-60 or (iii) in the case of any such Certificate
presented for registration in the name of an employee benefit plan subject to
ERISA or Section 4975 of the Code (or comparable provisions of any subsequent
enactments), or a trustee of any such plan or any other person acting on behalf
of any such plan, an Opinion of Counsel satisfactory to the Trustee to the
effect that the purchase or holding of such Class A-R Certificate will not
result in a nonexempt prohibited transaction under Section 406 of ERISA or
Section 4975 of the Code and will not subject the Trustee or the Servicer to any
obligation in addition to those undertaken in the Agreement, which Opinion of
Counsel shall not be an expense of the Trustee, the Servicer or the Trust Fund.
Notwithstanding anything else to the contrary herein, any purported transfer of
a Class A-R Certificate to or on behalf of an employee benefit plan subject to
ERISA or to Section 4975 of the Code without the opinion of counsel satisfactory
to the Trustee as described above shall be void and of no effect.

Each Holder of this Class A-R Certificate will be deemed to have agreed to be
bound by the restrictions of the Agreement, including but not limited to the
restrictions that (i) each person holding or acquiring any Ownership Interest in
this Class A-R Certificate must be a Permitted Transferee, (ii) no Ownership
Interest in this Class A-R Certificate may be transferred without delivery to
the Trustee of (a) a transfer affidavit of the proposed transferee and (b) a
transfer certificate of the transferor, each of such documents to be in the form
described in the Agreement, (iii) each person holding or acquiring any Ownership
Interest in this Class A-R Certificate must agree to require a transfer
affidavit and to deliver a transfer certificate to the Trustee as required
pursuant to the Agreement, (iv) each person holding or acquiring an Ownership
Interest in this Class A-R Certificate must agree not to transfer an Ownership
Interest in this Class A-R Certificate if it has actual knowledge that the
proposed transferee is not a Permitted Transferee and (v) any attempted or
purported transfer of any Ownership Interest in this Class A-R Certificate in
violation of such restrictions will be absolutely null and void and will vest no
rights in the purported transferee.

Reference is hereby made to the further provisions of this Certificate set forth
on the reverse hereof, which further provisions shall for all purposes have the
same effect as if set forth at this place.

This Certificate shall not be entitled to any benefit under the Agreement or be
valid for any purpose unless manually countersigned by an authorized signatory
of the Trustee.

                                      C-3
<PAGE>

         IN WITNESS WHEREOF, the Trustee has caused this Certificate to be duly
executed.

Dated:  ____________, 20__

                                          DEUTSCHE BANK NATIONAL TRUST COMPANY,
                                            as Trustee

                                          By ______________________

Countersigned:

By ___________________________
   Authorized Signatory of
   DEUTSCHE BANK NATIONAL TRUST COMPANY,
   as Trustee

                                      C-4
<PAGE>

                                    EXHIBIT D

                     [FORM OF NOTIONAL AMOUNT CERTIFICATES].

         [UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE
OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), TO THE ISSUER
OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE, OR PAYMENT, AND ANY
CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME
AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE
TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED
REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER
HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.]

         SOLELY FOR U.S. FEDERAL INCOME TAX PURPOSES, THIS CERTIFICATE IS A
"REGULAR INTEREST" IN A "REAL ESTATE MORTGAGE INVESTMENT CONDUIT," AS THOSE
TERMS ARE DEFINED, RESPECTIVELY, IN SECTIONS 860G AND 860D OF THE INTERNAL
REVENUE CODE OF 1986, AS AMENDED (THE "CODE").

         [UNTIL THIS CERTIFICATE HAS BEEN THE SUBJECT OF AN ERISA-QUALIFYING
UNDERWRITING, NEITHER THIS CERTIFICATE NOR ANY INTEREST HEREIN MAY BE
TRANSFERRED UNLESS THE TRANSFEREE DELIVERS TO THE TRUSTEE EITHER A
REPRESENTATION LETTER TO THE EFFECT THAT SUCH TRANSFEREE IS NOT AND IS NOT
INVESTING ON BEHALF OF OR WITH PLAN ASSETS OF AN EMPLOYEE BENEFIT PLAN SUBJECT
TO THE EMPLOYEE RETIREMENT INCOME SECURITY ACT OF 1974, AS AMENDED, OR A PLAN
SUBJECT TO SECTION 4975 OF THE CODE, OR AN OPINION OF COUNSEL IN ACCORDANCE WITH
THE PROVISIONS OF THE AGREEMENT REFERRED TO HEREIN. NOTWITHSTANDING ANYTHING
ELSE TO THE CONTRARY HEREIN, ANY PURPORTED TRANSFER OF THIS CERTIFICATE TO OR ON
BEHALF OF AN EMPLOYEE BENEFIT PLAN SUBJECT TO ERISA OR TO SECTION 4975 OF THE
CODE WITHOUT THE OPINION OF COUNSEL SATISFACTORY TO THE TRUSTEE AS DESCRIBED
ABOVE SHALL BE VOID AND OF NO EFFECT.]

THIS CERTIFICATE HAS NO PRINCIPAL BALANCE AND IS NOT ENTITLED TO ANY
DISTRIBUTIONS IN RESPECT OF PRINCIPAL.

                                      D-1
<PAGE>

Certificate No.                       :

Cut-off  Date                         :

First Distribution Date               :

Initial Notional Amount of
this Certificate
("Denomination")                      :           $

Initial Notional Amount of all
Certificates of this Class            :           $

CUSIP                                 :

Interest Rate                         :           %

Maturity Date                         :

                                INDYMAC MBS, INC.
                  Residential Asset Securitization Trust 200_-_
                Mortgage Pass-Through Certificates, Series 200_-_
                                   Class [__]

                           evidencing a percentage interest in the distributions
                  allocable to the Certificates of the above-referenced Class
                  with respect to a Trust Fund consisting primarily of a pool of
                  conventional mortgage loans (the "Mortgage Loans") secured by
                  first liens on one- to four-family residential properties.

                         IndyMac MBS, Inc., as Depositor

         This Certificate does not evidence an obligation of, or an interest in,
and is not guaranteed by the Depositor, the Seller, the Servicer or the Trustee
referred to below or any of their respective affiliates. Neither this
Certificate nor the Mortgage Loans are guaranteed or insured by any governmental
agency or instrumentality.

                                      D-2
<PAGE>

         This certifies that __________ is the registered owner of the
Percentage Interest evidenced by this Certificate (obtained by dividing the
denomination of this Certificate by the aggregate Initial Notional Amounts of
all Certificates of the Class to which this Certificate belongs) in certain
monthly distributions with respect to a Trust Fund consisting primarily of the
Mortgage Loans deposited by IndyMac MBS, Inc. (the "Depositor"). The Trust Fund
was created pursuant to a Pooling and Servicing Agreement dated as of the
Cut-off Date specified above (the "Agreement") among the Depositor, IndyMac
Bank, F.S.B., as seller (in such capacity, the "Seller") and as servicer (in
such capacity, the "Servicer"), and Deutsche Bank National Trust Company, as
trustee (the "Trustee") and as supplemental interest trustee. To the extent not
defined herein, the capitalized terms used herein have the meanings assigned in
the Agreement. This Certificate is issued under and is subject to the terms,
provisions and conditions of the Agreement, to which Agreement the Holder of
this Certificate by virtue of the acceptance hereof assents and by which such
Holder is bound.

         [Until this certificate has been the subject of an ERISA-Qualifying
Underwriting, no transfer of a Certificate of this Class shall be made unless
the Trustee shall have received either (i) a representation letter from the
transferee of such Certificate, acceptable to and in form and substance
satisfactory to the Trustee, to the effect that such transferee is not an
employee benefit plan subject to Section 406 of ERISA or Section 4975 of the
Code, nor a person investing on behalf of or with plan assets of any such plan,
which representation letter shall not be an expense of the Trustee or the
Servicer, or (ii) in the case of any such Certificate presented for registration
in the name of an employee benefit plan subject to ERISA or Section 4975 of the
Code (or comparable provisions of any subsequent enactments), or a trustee of
any such plan or any other person acting on behalf of any such plan, an Opinion
of Counsel satisfactory to the Trustee and the Servicer to the effect that the
purchase or holding of such Certificate will not result in a nonexempt
prohibited transaction under Section 406 of ERISA or Section 4975 of the Code
and will not subject the Trustee or the Servicer to any obligation in addition
to those undertaken in the Agreement, which Opinion of Counsel shall not be an
expense of the Trustee, the Servicer, or the Trust Fund. Notwithstanding
anything else to the contrary herein, until this certificate has been the
subject of an ERISA-Qualifying Underwriting, any purported transfer of a
Certificate of this Class to or on behalf of an employee benefit plan subject to
ERISA or to the Code without the opinion of counsel satisfactory to the Trustee
as described above shall be void and of no effect.]

         Reference is hereby made to the further provisions of this Certificate
set forth on the reverse hereof, which further provisions shall for all purposes
have the same effect as if set forth at this place.

         This Certificate shall not be entitled to any benefit under the
Agreement or be valid for any purpose unless manually countersigned by an
authorized signatory of the Trustee.

                                      D-3
<PAGE>

         IN WITNESS WHEREOF, the Trustee has caused this Certificate to be duly
executed.

Dated:  ____________, 20__

                                          DEUTSCHE BANK NATIONAL TRUST COMPANY,
                                            as Trustee

                                          By ______________________

Countersigned:

         By ___________________________
                Authorized Signatory of
                DEUTSCHE BANK NATIONAL TRUST COMPANY,
                as Trustee

                                      D-4
<PAGE>

                                    EXHIBIT E

                        [Form of Reverse of Certificates]

                                INDYMAC MBS, INC.
                     IndyMac INDA Mortgage Loan Trust 200_-_
                Mortgage Pass-Through Certificates, Series 200_-_

         This Certificate is one of a duly authorized issue of Certificates
designated as IndyMac MBS, Inc. Mortgage Pass-Through Certificates, of the
Series specified on the face hereof (herein collectively called the
"Certificates"), and representing a beneficial ownership interest in the Trust
Fund created by the Agreement.

         The Certificateholder, by its acceptance of this Certificate, agrees
that it will look solely to the funds on deposit in the Distribution Account for
payment hereunder and that the Trustee is not liable to the Certificateholders
for any amount payable under this Certificate or the Agreement or, except as
expressly provided in the Agreement, subject to any liability under the
Agreement.

         This Certificate does not purport to summarize the Agreement and
reference is made to the Agreement for the interests, rights and limitations of
rights, benefits, obligations and duties evidenced thereby, and the rights,
duties and immunities of the Trustee.

         Pursuant to the terms of the Agreement, a distribution will be made on
the 25th day of each month or, if such 25th day is not a Business Day, the
Business Day immediately following (the "Distribution Date"), commencing on the
first Distribution Date specified on the face hereof, to the Person in whose
name this Certificate is registered at the close of business on the applicable
Record Date in an amount equal to the product of the Percentage Interest
evidenced by this Certificate and the amount required to be distributed to
Holders of Certificates of the Class to which this Certificate belongs on such
Distribution Date pursuant to the Agreement. The Record Date applicable to each
Distribution Date is the last Business Day of the month next preceding the month
of such Distribution Date.

         Distributions on this Certificate shall be made by wire transfer of
immediately available funds to the account of the Holder hereof at a bank or
other entity having appropriate facilities therefor, if such Certificateholder
shall have so notified the Trustee in writing at least five Business Days prior
to the Record Date and such Certificateholder shall satisfy the conditions to
receive such form of payment set forth in the Agreement, or, if not, by check
mailed by first class mail to the address of such Certificateholder appearing in
the Certificate Register. The final distribution on each Certificate will be
made in like manner, but only upon presentment and surrender of such Certificate
at the Corporate Trust Office or such other location specified in the notice to
Certificateholders of such final distribution.

         The Agreement permits, with certain exceptions therein provided, the
amendment thereof and the modification of the rights and obligations of the
Trustee and the rights of the Certificateholders under the Agreement at any time
by the Depositor, the Servicer and the Trustee with the consent of the Holders
of Certificates affected by such amendment evidencing the requisite Percentage
Interest, as provided in the Agreement. Any such consent by the Holder of this
Certificate shall be conclusive and binding on such Holder and upon all future
Holders of this Certificate and of any Certificate issued upon the transfer
hereof or in exchange therefor or in lieu hereof whether or not notation of such
consent is made upon this Certificate. The Agreement also permits the amendment
thereof, in certain limited circumstances, without the consent of the Holders of
any of the Certificates.

                                      E-1
<PAGE>

         As provided in the Agreement and subject to certain limitations therein
set forth, the transfer of this Certificate is registrable in the Certificate
Register of the Trustee upon surrender of this Certificate for registration of
transfer at the Corporate Trust Office, accompanied by a written instrument of
transfer in form satisfactory to the Trustee and the Certificate Registrar duly
executed by the holder hereof or such holder's attorney duly authorized in
writing, and thereupon one or more new Certificates of the same Class in
authorized denominations and evidencing the same aggregate Percentage Interest
in the Trust Fund will be issued to the designated transferee or transferees.

         The Certificates are issuable only as registered Certificates without
coupons in denominations specified in the Agreement. As provided in the
Agreement and subject to certain limitations therein set forth, Certificates are
exchangeable for new Certificates of the same Class in authorized denominations
and evidencing the same aggregate Percentage Interest, as requested by the
Holder surrendering the same.

         No service charge will be made for any such registration of transfer or
exchange, but the Trustee may require payment of a sum sufficient to cover any
tax or other governmental charge payable in connection therewith.

         The Depositor, the Servicer, the Seller and the Trustee and any agent
of the Depositor or the Trustee may treat the Person in whose name this
Certificate is registered as the owner hereof for all purposes, and neither the
Depositor, the Trustee, nor any such agent shall be affected by any notice to
the contrary.

         On any Distribution Date on which the aggregate Stated Principal
Balance of the Mortgage Loans in the mortgage pool is less than 10% of the
Cut-off Date Pool Principal Balance, the Servicer will have the option to
repurchase, in whole, from the Trust Fund all remaining Mortgage Loans in the
mortgage pool and all property acquired in respect of the Mortgage Loans in the
mortgage pool at a purchase price determined as provided in the Agreement. In
the event that no such optional termination occurs, the obligations and
responsibilities created by the Agreement will terminate upon the later of the
maturity or other liquidation (or any advance with respect thereto) of the last
Mortgage Loan remaining in the Trust Fund or the disposition of all property in
respect thereof and the distribution to Certificateholders of all amounts
required to be distributed pursuant to the Agreement. In no event, however, will
the trust created by the Agreement continue beyond the expiration of 21 years
from the death of the last survivor of the descendants living at the date of the
Agreement of a certain person named in the Agreement.

         Any term used herein that is defined in the Agreement shall have the
meaning assigned in the Agreement, and nothing herein shall be deemed
inconsistent with that meaning.

                                      E-2
<PAGE>

                                   ASSIGNMENT
                                   ----------

         FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and
transfer(s) unto
_______________________________________________________________________________
_______________________________________________________________________________
______________________________________________
(Please print or typewrite name and address including postal zip code of
assignee)

the Percentage Interest evidenced by the within Certificate and hereby
authorizes the transfer of registration of such Percentage Interest to assignee
on the Certificate Register of the Trust Fund.

         I (We) further direct the Trustee to issue a new Certificate of a like
denomination and Class, to the above named assignee and deliver such Certificate
to the following address:

______________________________________________________________________________.

Dated:

                                          -------------------------------------
                                          Signature by or on behalf of assignor

                            DISTRIBUTION INSTRUCTIONS

         The assignee should include the following for purposes of distribution:

         Distributions shall be made, by wire transfer or otherwise, in
immediately available funds
to_____________________________________________________________________________,
for the account of ____________________________________________________________,
account number        , or, if mailed by check, to ____________________________
_______________________________________________________________________________
_______________________________________________________________________________.
Applicable statements should be mailed to _____________________________________
_______________________________________________________________________________

         This information is provided by ______________________________________,
the assignee named above, or __________________________________________________,

         as its agent.

                                      E-3
<PAGE>

STATE OF CALIFORNIA                    )
                                       :  ss.:
COUNTY OF _____________                )

         On the th day of _________, 20__ before me, a notary public in and for
said State, personally appeared ______________ , known to me who, being by me
duly sworn, did depose and say that he executed the foregoing instrument.

                                  -----------------------------------
                                  Notary Public

[Notarial Seal]

                                      E-4
<PAGE>

                                   EXHIBIT F-1

                      [FORM OF CLASS P-[1][2] CERTIFICATE]

SOLELY FOR U.S. FEDERAL INCOME TAX PURPOSES, THIS CERTIFICATE IS A "REGULAR
INTEREST" IN A "REAL ESTATE MORTGAGE INVESTMENT CONDUIT," AS THOSE TERMS ARE
DEFINED, RESPECTIVELY, IN SECTIONS 860G AND 860D OF THE INTERNAL REVENUE CODE OF
1986, AS AMENDED (THE "CODE").

THIS CERTIFICATE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED (THE "ACT"). ANY RESALE OR TRANSFER OF THIS CERTIFICATE WITHOUT
REGISTRATION THEREOF UNDER THE ACT MAY ONLY BE MADE IN A TRANSACTION EXEMPTED
FROM THE REGISTRATION REQUIREMENTS OF THE ACT AND IN ACCORDANCE WITH THE
PROVISIONS OF THE AGREEMENT REFERRED TO HEREIN.

[NEITHER THIS CERTIFICATE NOR ANY INTEREST HEREIN MAY BE TRANSFERRED UNLESS THE
TRANSFEREE REPRESENTS TO THE TRUSTEE THAT SUCH TRANSFEREE IS NOT AND IS NOT
INVESTING ON BEHALF OF OR WITH PLAN ASSETS OF AN EMPLOYEE BENEFIT PLAN SUBJECT
TO THE EMPLOYEE RETIREMENT INCOME SECURITY ACT OF 1974, AS AMENDED ("ERISA"), OR
A PLAN SUBJECT TO SECTION 4975 OF THE CODE, OR, IF THE CERTIFICATE HAS BEEN THE
SUBJECT OF AN ERISA-QUALIFYING UNDERWRITING, DELIVERS A REPRESENTATION IN
ACCORDANCE WITH THE PROVISIONS OF THE AGREEMENT REFERRED TO HEREIN, OR DELIVERS
TO THE TRUSTEE AN OPINION OF COUNSEL IN ACCORDANCE WITH THE PROVISIONS OF THE
AGREEMENT REFERRED TO HEREIN. NOTWITHSTANDING ANYTHING ELSE TO THE CONTRARY
HEREIN, ANY PURPORTED TRANSFER OF THIS CERTIFICATE TO OR ON BEHALF OF AN
EMPLOYEE BENEFIT PLAN SUBJECT TO ERISA OR TO SECTION 4975 OF THE CODE WITHOUT
THE OPINION OF COUNSEL SATISFACTORY TO THE TRUSTEE AS DESCRIBED ABOVE SHALL BE
VOID AND OF NO EFFECT.]

                                     F-1-1
<PAGE>

Certificate No.                                :

Cut-off Date                                   :

First Distribution Date                        :

Initial Certificate Balance
of this Certificate
("Denomination")                               :     $

Initial Certificate Balances
of all Certificates
of this Class                                  :     $
CUSIP                                          :

Interest Rate                                  :

Maturity Date                                  :

                                INDYMAC MBS, INC.
                    IndyMac INDA Mortgage Loan Trust 200_-__
               Mortgage Pass-Through Certificates, Series 200_-__

                                 Class P-[1][2]
       evidencing a percentage interest in the distributions allocable to the
       Certificates of the above-referenced Class with respect to a Trust Fund
       consisting primarily of a pool of conventional mortgage loans (the
       "Mortgage Loans") secured by first liens on one- to four-family
       residential properties.

Distributors in respect of this Certificate are distributable monthly as set
forth herein. Accordingly, the Certificate Balance at any time may be less than
the Certificate Balance as set forth herein. This Certificate does not evidence
an obligation of, or an interest in, and is not guaranteed by the Depositor, the
Seller, the Servicer or the Trustee referred to below or any of their respective
affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or
insured by any governmental agency or instrumentality.

This certifies that ________________ is the registered owner of the Percentage
Interest evidenced by this Certificate (obtained by dividing the denomination of
this Certificate by the aggregate of the denominations of all Certificates of
the Class to which this Certificate belongs) in certain monthly distributions
with respect to a Trust Fund consisting primarily of the Mortgage Loans
deposited by IndyMac MBS, Inc. (the "Depositor"). The Trust Fund was created
pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date
specified above (the "Agreement") among the Depositor, IndyMac Bank, F.S.B., as
seller and servicer (the "Seller" or the "Servicer", as appropriate), and
Deutsche Bank National Trust Company, as trustee (the "Trustee") and as
supplemental interest trustee. To the extent not defined herein, the capitalized
terms used herein have the meanings assigned in the

                                     F-1-2
<PAGE>

Agreement. This Certificate is issued under and is subject to the terms,
provisions and conditions of the Agreement, to which Agreement the Holder of
this Certificate by virtue of the acceptance hereof assents and by which such
Holder is bound.

The Certificates are limited in right of payment to certain collections and
recoveries respecting the Mortgage Loans, all as more specifically set forth
herein and in the Agreement. As provided in the Agreement, withdrawals from the
Distribution Account may be made from time to time for purposes other than
distributions to Certificateholders, such purposes including reimbursement of
advances made, or certain expenses incurred, with respect to the Mortgage Loans.

This Certificate does not have a Certificate Balance or Pass-Through Rate and
will be entitled to distributions only to the extent set forth in the Agreement.
In addition, any distribution of the proceeds of any remaining assets of the
Trust will be made only upon presentment and surrender of this Certificate at
the Corporate Trust Office or the office or agency maintained by the Trustee.

No transfer of a Certificate of this Class shall be made unless such disposition
is exempt from the registration requirements of the Securities Act of 1933, as
amended (the "1933 Act"), and any applicable state securities laws or is made in
accordance with the 1933 Act and such laws. In the event of any such transfer,
the Trustee shall require the transferor to execute a transferor certificate (in
substantially the form attached to the Pooling and Servicing Agreement) and
deliver either (i) an Investment Letter or the Rule 144A Letter, in either case
substantially in the form attached to the Agreement, or (ii) a written Opinion
of Counsel to the Trustee that such transfer may be made pursuant to an
exemption, describing the applicable exemption and the basis therefor, from the
1933 Act or is being made pursuant to the 1933 Act, which Opinion of Counsel
shall be an expense of the transferor.

[No transfer of a Certificate of this Class shall be made unless the Trustee
shall have received either (i) a representation [letter] from the transferee of
such Certificate, acceptable to and in form and substance satisfactory to the
Trustee, to the effect that such transferee is not an employee benefit plan or
other benefit plan subject to Section 406 of ERISA or Section 4975 of the Code,
or a person acting on behalf of or investing plan assets of any such plan, which
representation letter shall not be an expense of the Trustee or the Servicer,
(ii) if the purchaser is an insurance company and the Certificate has been the
subject of an ERISA-Qualifying Underwriting, a representation that the purchaser
is an insurance company which is purchasing such Certificates with funds
contained in an "insurance company general account" (as such term is defined in
Section V(e) of Prohibited Transaction Class Exemption 95-60 ("PTCE 95-60")) and
that the purchase and holding of such Certificates are covered under Sections I
and III of PTCE 95-60 or (iii) in the case of any such Certificate presented for
registration in the name of an employee benefit plan subject to ERISA or Section
4975 of the Code (or comparable provisions of any subsequent enactments), or a
trustee of any such plan or any other person acting on behalf of any such plan,
an Opinion of Counsel satisfactory to the Trustee and the Servicer to the effect
that the purchase or holding of such Certificate will not result in a nonexempt
prohibited transaction under ERISA or Section 4975 of the Code and will not
subject the Trustee or the Servicer to any obligation in addition to those
undertaken in the Agreement, which Opinion of Counsel shall not be an expense of
the Trustee, the Servicer or the Trust Fund. Notwithstanding anything else to
the contrary herein, any purported transfer of a Certificate of this Class to or
on behalf of an employee benefit plan subject to ERISA or to Section 4975 of the
Code without the opinion of counsel satisfactory to the Trustee as described
above shall be void and of no effect.]

Reference is hereby made to the further provisions of this Certificate set forth
on the reverse hereof, which further provisions shall for all purposes have the
same effect as if set forth at this place.

                                     F-1-3
<PAGE>

This Certificate shall not be entitled to any benefit under the Agreement or be
valid for any purpose unless manually countersigned by an authorized signatory
of the Trustee.

                               *       *      *

                                     F-1-4
<PAGE>

         IN WITNESS WHEREOF, the Trustee has caused this Certificate to be duly
executed.

Dated:  _______, ____

                                           DEUTSCHE BANK NATIONAL TRUST COMPANY,
                                             as Trustee

                                           By _________________________________

Countersigned:

By ___________________________
      Authorized Signatory of
      DEUTSCHE BANK NATIONAL TRUST
      COMPANY, as Trustee

                                     F-1-5
<PAGE>

                                INDYMAC MBS, INC.
                    IndyMac INDA Mortgage Loan Trust 200_-__
                       Mortgage Pass-Through Certificates

This Certificate is one of a duly authorized issue of Certificates designated as
IndyMac MBS, Inc. Mortgage Pass-Through Certificates, of the Series specified on
the face hereof (herein collectively called the "Certificates"), and
representing a beneficial ownership interest in the Trust Fund created by the
Agreement.

The Certificateholder, by its acceptance of this Certificate, agrees that it
will look solely to the funds on deposit in the Distribution Account for payment
hereunder and that the Trustee is not liable to the Certificateholders for any
amount payable under this Certificate or the Agreement or, except as expressly
provided in the Agreement, subject to any liability under the Agreement.

This Certificate does not purport to summarize the Agreement and reference is
made to the Agreement for the interests, rights and limitations of rights,
benefits, obligations and duties evidenced thereby, and the rights, duties and
immunities of the Trustee.

Pursuant to the terms of the Agreement, a distribution will be made on the 25th
day of each month or, if such 25th day is not a Business Day, the Business Day
immediately following (the "Distribution Date"), commencing on the first
Distribution Date specified on the face hereof, to the Person in whose name this
Certificate is registered at the close of business on the applicable Record Date
in an amount equal to the product of the Percentage Interest evidenced by this
Certificate and the amount required to be distributed to Holders of Certificates
of the Class to which this Certificate belongs on such Distribution Date
pursuant to the Agreement. The Record Date applicable to each Distribution Date
is the last Business Day of the month next preceding the month of such
Distribution Date.

Distributions on this Certificate shall be made by wire transfer of immediately
available funds to the account of the Holder hereof at a bank or other entity
having appropriate facilities therefor, if such Certificateholder shall have so
notified the Trustee in writing at least five Business Days prior to the related
Record Date and such Certificateholder shall satisfy the conditions to receive
such form of payment set forth in the Agreement, or, if not, by check mailed by
first class mail to the address of such Certificateholder appearing in the
Certificate Register. The final distribution on each Certificate will be made in
like manner, but only upon presentment and surrender of such Certificate at the
Corporate Trust Office or such other location specified in the notice to
Certificateholders of such final distribution.

The Agreement permits, with certain exceptions therein provided, the amendment
thereof and the modification of the rights and obligations of the Trustee and
the rights of the Certificateholders under the Agreement at any time by the
Depositor, the Servicer and the Trustee with the consent of the Holders of
Certificates affected by such amendment evidencing the requisite Percentage
Interest, as provided in the Agreement. Any such consent by the Holder of this
Certificate shall be conclusive and binding on such Holder and upon all future
Holders of this Certificate and of any Certificate issued upon the transfer
hereof or in exchange therefor or in lieu hereof whether or not notation of such
consent is made upon this Certificate. The Agreement also permits the amendment
thereof, in certain limited circumstances, without the consent of the Holders of
any of the Certificates.

As provided in the Agreement and subject to certain limitations therein set
forth, the transfer of this Certificate is registrable in the Certificate
Register of the Trustee upon surrender of this Certificate for registration of
transfer at the Corporate Trust Office, accompanied by a written instrument of
transfer in form satisfactory to the Trustee and the Certificate Registrar duly
executed by the holder hereof or such holder's attorney duly authorized in
writing, and thereupon one or more new Certificates of the same

                                     F-1-6
<PAGE>

Class in authorized denominations and evidencing the same aggregate Percentage
Interest in the Trust Fund will be issued to the designated transferee or
transferees.

The Certificates are issuable only as registered Certificates without coupons in
denominations specified in the Agreement. As provided in the Agreement and
subject to certain limitations therein set forth, Certificates are exchangeable
for new Certificates of the same Class in authorized denominations and
evidencing the same aggregate Percentage Interest, as requested by the Holder
surrendering the same.

No service charge will be made for any such registration of transfer or
exchange, but the Trustee may require payment of a sum sufficient to cover any
tax or other governmental charge payable in connection therewith.

The Depositor, the Servicer, the Seller and the Trustee and any agent of the
Depositor or the Trustee may treat the Person in whose name this Certificate is
registered as the owner hereof for all purposes, and neither the Depositor, the
Trustee, nor any such agent shall be affected by any notice to the contrary.

On any Distribution Date on which the aggregate Stated Principal Balance of the
Mortgage Loans is less than 10% of the Cut-off Date Pool Principal Balance, the
Servicer will have the option to repurchase, in whole, from the Trust Fund all
remaining Mortgage Loans and all property acquired in respect of the Mortgage
Loans at a purchase price determined as provided in the Agreement. In the event
that no such optional termination occurs, the related obligations and
responsibilities created by the Agreement will terminate upon the later of the
maturity or other liquidation (or any advance with respect thereto) of the last
Mortgage Loan remaining in the Trust Fund or the disposition of all property in
respect thereof and the distribution to Certificateholders of all amounts
required to be distributed pursuant to the Agreement. In no event, however, will
the trust created by the Agreement continue beyond the expiration of 21 years
from the death of the last survivor of the descendants living at the date of the
Agreement of a certain person named in the Agreement.

Any term used herein that is defined in the Agreement shall have the meaning
assigned in the Agreement, and nothing herein shall be deemed inconsistent with
that meaning.

                                     F-1-7
<PAGE>

                                   ASSIGNMENT
                                   ----------

       FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and
transfer(s) unto
_______________________________________________________________________________
_______________________________________________________________________________
______________________________________________
(Please print or typewrite name and address including postal zip code of
assignee)

the Percentage Interest evidenced by the within Certificate and hereby
authorizes the transfer of registration of such Percentage Interest to assignee
on the Certificate Register of the Trust Fund.

         I (We) further direct the Trustee to issue a new Certificate of a like
denomination and Class, to the above named assignee and deliver such Certificate
to the following address:

______________________________________________________________________________.

Dated:

                                          -------------------------------------
                                          Signature by or on behalf of assignor

                            DISTRIBUTION INSTRUCTIONS

         The assignee should include the following for purposes of distribution:

         Distributions shall be made, by wire transfer or otherwise, in
immediately available funds
to_____________________________________________________________________________,
for the account of ____________________________________________________________,
account number        , or, if mailed by check, to ____________________________
_______________________________________________________________________________
_______________________________________________________________________________.
Applicable statements should be mailed to _____________________________________
_______________________________________________________________________________

         This information is provided by ______________________________________,
the assignee named above, or __________________________________________________,
as its agent.

                                     F-1-8
<PAGE>

STATE OF ___________________                )
                                            )  ss.:
COUNTY OF __________________                )

                  On the th day of , 20 before me, a notary public in and for
said State, personally appeared , known to me who, being by me duly sworn, did
depose and say that he executed the foregoing instrument.

                                           -------------------------------
                                                    Notary Public

[Notarial Seal]

                                     F-1-9
<PAGE>

                                   EXHIBIT F-2

                           FORM OF CLASS L CERTIFICATE

                  THIS CERTIFICATE HAS NOT BEEN AND WILL NOT BE REGISTERED UNDER
THE SECURITIES ACT OF 1933, AS AMENDED, OR THE SECURITIES LAWS OF ANY STATE AND
MAY NOT BE RESOLD OR TRANSFERRED UNLESS IT IS REGISTERED PURSUANT TO SUCH ACT
AND LAWS OR IS SOLD OR TRANSFERRED IN TRANSACTIONS THAT ARE EXEMPT FROM
REGISTRATION UNDER SUCH ACT AND UNDER APPLICABLE STATE LAW AND IS TRANSFERRED IN
ACCORDANCE WITH THE PROVISIONS OF SECTION 5.02 OF THE POOLING AND SERVICING
AGREEMENT.

                  NEITHER THIS CERTIFICATE NOR ANY INTEREST HEREIN MAY BE
TRANSFERRED UNLESS THE PROPOSED TRANSFEREE DELIVERS TO THE TRUSTEE A TRANSFER
AFFIDAVIT IN ACCORDANCE WITH THE PROVISIONS OF THE AGREEMENT REFERRED TO HEREIN.

[NEITHER THIS CERTIFICATE NOR ANY INTEREST HEREIN MAY BE TRANSFERRED UNLESS THE
TRANSFEREE REPRESENTS TO THE TRUSTEE THAT SUCH TRANSFEREE IS NOT AND IS NOT
INVESTING ON BEHALF OF OR WITH PLAN ASSETS OF AN EMPLOYEE BENEFIT PLAN SUBJECT
TO THE EMPLOYEE RETIREMENT INCOME SECURITY ACT OF 1974, AS AMENDED ("ERISA"), OR
A PLAN SUBJECT TO SECTION 4975 OF THE CODE, OR, IF THE CERTIFICATE HAS BEEN THE
SUBJECT OF AN ERISA-QUALIFYING UNDERWRITING, DELIVERS A REPRESENTATION IN
ACCORDANCE WITH THE PROVISIONS OF THE AGREEMENT REFERRED TO HEREIN, OR DELIVERS
TO THE TRUSTEE AN OPINION OF COUNSEL IN ACCORDANCE WITH THE PROVISIONS OF THE
AGREEMENT REFERRED TO HEREIN. NOTWITHSTANDING ANYTHING ELSE TO THE CONTRARY
HEREIN, ANY PURPORTED TRANSFER OF THIS CERTIFICATE TO OR ON BEHALF OF AN
EMPLOYEE BENEFIT PLAN SUBJECT TO ERISA OR TO SECTION 4975 OF THE CODE WITHOUT
THE OPINION OF COUNSEL SATISFACTORY TO THE TRUSTEE AS DESCRIBED ABOVE SHALL BE
VOID AND OF NO EFFECT.]

                                     F-2-1
<PAGE>

Certificate No.                                :

Cut-off Date                                   :

First Distribution Date                        :

Percentage Interest
of this Certificate
("Denomination")                               :     %

CUSIP                                          :

Interest Rate                                  :

Maturity Date                                  :

                                INDYMAC MBS, INC.
                    IndyMac INDA Mortgage Loan Trust 200_-__
               Mortgage Pass-Through Certificates, Series 200_-__
                                     Class L

         evidencing a percentage interest in the distributions allocable to the
         Certificates of the above-referenced Class payable solely from Late
         Payment Fees.

                  Distributions in respect of this Certificate are distributable
monthly as set forth herein. This Certificate does not evidence an obligation
of, or an interest in, and is not guaranteed by the Depositor, the Seller, the
Servicer or the Trustee referred to below or any of their respective affiliates.
Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any
governmental agency or instrumentality.

                  This certifies that [_________] is the registered owner of the
Percentage Interest evidenced by this Certificate (obtained by dividing the
Denomination of this Certificate by the aggregate of the Denominations of all
Certificates of the Class to which this Certificate belongs) in certain monthly
distributions pursuant to a Pooling and Servicing Agreement dated as of the
Cut-off Date specified above (the "Agreement") among IndyMac MBS, Inc., as
depositor (the "Depositor"), IndyMac Bank, F.S.B., as seller (in such capacity,
the "Seller") and as servicer (in such capacity, the "Servicer"), and Deutsche
Bank National Trust Company, as trustee (the "Trustee") and as supplemental
interest trustee. To the extent not defined herein, the capitalized terms used
herein have the meanings assigned in the Agreement. This Certificate is issued
under and is subject to the terms, provisions and conditions of the Agreement,
to which Agreement the Holder of this Certificate by virtue of the acceptance
hereof assents and by which such Holder is bound.

                  This Certificate does not have a Pass-Through Rate and will be
entitled to distributions only to the extent set forth in the Agreement and
solely payable from Late Payment Fees. In addition, any distribution of the
proceeds of any remaining assets of the Trust will be made only upon presentment
and surrender of this Certificate at the office or agency maintained by the
Trustee.

                                     F-2-2
<PAGE>

         No transfer of a Certificate of this Class shall be made unless such
disposition is exempt from the registration requirements of the Securities Act
of 1933, as amended (the "1933 Act"), and any applicable state securities laws
or is made in accordance with the 1933 Act and such laws. In the event of any
such transfer, subject to the provisions in Section 5.02(b) of the Agreement,
the Trustee shall require the transferor to execute a transferor certificate (in
substantially the form attached to the Pooling and Servicing Agreement) and
deliver either (i) an Investment Letter or the Rule 144A Letter, in either case
substantially in the form attached to the Agreement, or (ii) a written Opinion
of Counsel to the Trustee that such transfer may be made pursuant to an
exemption, describing the applicable exemption and the basis therefor, from the
1933 Act or is being made pursuant to the 1933 Act, which Opinion of Counsel
shall be an expense of the transferor.

[No transfer of a Certificate of this Class shall be made unless the Trustee
shall have received either (i) a representation [letter] from the transferee of
such Certificate, acceptable to and in form and substance satisfactory to the
Trustee, to the effect that such transferee is not an employee benefit plan or
other benefit plan subject to Section 406 of ERISA or Section 4975 of the Code,
or a person acting on behalf of or investing plan assets of any such plan, which
representation letter shall not be an expense of the Trustee or the Servicer,
(ii) if the purchaser is an insurance company and the Certificate has been the
subject of an ERISA-Qualifying Underwriting, a representation that the purchaser
is an insurance company which is purchasing such Certificates with funds
contained in an "insurance company general account" (as such term is defined in
Section V(e) of Prohibited Transaction Class Exemption 95-60 ("PTCE 95-60")) and
that the purchase and holding of such Certificates are covered under Sections I
and III of PTCE 95-60 or (iii) in the case of any such Certificate presented for
registration in the name of an employee benefit plan subject to ERISA or Section
4975 of the Code (or comparable provisions of any subsequent enactments), or a
trustee of any such plan or any other person acting on behalf of any such plan,
an Opinion of Counsel satisfactory to the Trustee and the Servicer to the effect
that the purchase or holding of such Certificate will not result in a nonexempt
prohibited transaction under ERISA or Section 4975 of the Code and will not
subject the Trustee or the Servicer to any obligation in addition to those
undertaken in the Agreement, which Opinion of Counsel shall not be an expense of
the Trustee, the Servicer or the Trust Fund. Notwithstanding anything else to
the contrary herein, any purported transfer of a Certificate of this Class to or
on behalf of an employee benefit plan subject to ERISA or to Section 4975 of the
Code without the opinion of counsel satisfactory to the Trustee as described
above shall be void and of no effect.]

         Reference is hereby made to the further provisions of this Certificate
set forth on the reverse hereof, which further provisions shall for all purposes
have the same effect as if set forth at this place.

         This Certificate shall not be entitled to any benefit under the
Agreement or be valid for any purpose unless manually countersigned by an
authorized signatory of the Trustee.

                                     F-2-3
<PAGE>

         IN WITNESS WHEREOF, the Trustee has caused this Certificate to be duly
executed.

Dated:  _______, ____

                                           DEUTSCHE BANK NATIONAL TRUST COMPANY,
                                             as Trustee

                                           By _________________________________

Countersigned:

By ___________________________
      Authorized Signatory of
      DEUTSCHE BANK NATIONAL TRUST
      COMPANY, as Trustee

                                     F-2-4
<PAGE>

                                INDYMAC MBS, INC.
                    IndyMac INDA Mortgage Loan Trust 200_-__
                       Mortgage Pass-Through Certificates

This Certificate is one of a duly authorized issue of Certificates designated as
IndyMac MBS, Inc. Mortgage Pass-Through Certificates, of the Series specified on
the face hereof (herein collectively called the "Certificates"), and
representing a beneficial ownership interest in the Trust Fund created by the
Agreement.

The Certificateholder, by its acceptance of this Certificate, agrees that it
will look solely to the funds on deposit in the Distribution Account for payment
hereunder and that the Trustee is not liable to the Certificateholders for any
amount payable under this Certificate or the Agreement or, except as expressly
provided in the Agreement, subject to any liability under the Agreement.

This Certificate does not purport to summarize the Agreement and reference is
made to the Agreement for the interests, rights and limitations of rights,
benefits, obligations and duties evidenced thereby, and the rights, duties and
immunities of the Trustee.

Pursuant to the terms of the Agreement, a distribution will be made on the 25th
day of each month or, if such 25th day is not a Business Day, the Business Day
immediately following (the "Distribution Date"), commencing on the first
Distribution Date specified on the face hereof, to the Person in whose name this
Certificate is registered at the close of business on the applicable Record Date
in an amount equal to the product of the Percentage Interest evidenced by this
Certificate and the amount required to be distributed to Holders of Certificates
of the Class to which this Certificate belongs on such Distribution Date
pursuant to the Agreement. The Record Date applicable to each Distribution Date
is the last Business Day of the month next preceding the month of such
Distribution Date.

Distributions on this Certificate shall be made by wire transfer of immediately
available funds to the account of the Holder hereof at a bank or other entity
having appropriate facilities therefor, if such Certificateholder shall have so
notified the Trustee in writing at least five Business Days prior to the related
Record Date and such Certificateholder shall satisfy the conditions to receive
such form of payment set forth in the Agreement, or, if not, by check mailed by
first class mail to the address of such Certificateholder appearing in the
Certificate Register. The final distribution on each Certificate will be made in
like manner, but only upon presentment and surrender of such Certificate at the
Corporate Trust Office or such other location specified in the notice to
Certificateholders of such final distribution.

The Agreement permits, with certain exceptions therein provided, the amendment
thereof and the modification of the rights and obligations of the Trustee and
the rights of the Certificateholders under the Agreement at any time by the
Depositor, the Servicer and the Trustee with the consent of the Holders of
Certificates affected by such amendment evidencing the requisite Percentage
Interest, as provided in the Agreement. Any such consent by the Holder of this
Certificate shall be conclusive and binding on such Holder and upon all future
Holders of this Certificate and of any Certificate issued upon the transfer
hereof or in exchange therefor or in lieu hereof whether or not notation of such
consent is made upon this Certificate. The Agreement also permits the amendment
thereof, in certain limited circumstances, without the consent of the Holders of
any of the Certificates.

As provided in the Agreement and subject to certain limitations therein set
forth, the transfer of this Certificate is registrable in the Certificate
Register of the Trustee upon surrender of this Certificate for registration of
transfer at the Corporate Trust Office, accompanied by a written instrument of
transfer in form satisfactory to the Trustee and the Certificate Registrar duly
executed by the holder hereof or such holder's attorney duly authorized in
writing, and thereupon one or more new Certificates of the same

                                     F-2-5
<PAGE>

Class in authorized denominations and evidencing the same aggregate Percentage
Interest in the Trust Fund will be issued to the designated transferee or
transferees.

The Certificates are issuable only as registered Certificates without coupons in
denominations specified in the Agreement. As provided in the Agreement and
subject to certain limitations therein set forth, Certificates are exchangeable
for new Certificates of the same Class in authorized denominations and
evidencing the same aggregate Percentage Interest, as requested by the Holder
surrendering the same.

No service charge will be made for any such registration of transfer or
exchange, but the Trustee may require payment of a sum sufficient to cover any
tax or other governmental charge payable in connection therewith.

The Depositor, the Servicer, the Seller and the Trustee and any agent of the
Depositor or the Trustee may treat the Person in whose name this Certificate is
registered as the owner hereof for all purposes, and neither the Depositor, the
Trustee, nor any such agent shall be affected by any notice to the contrary.

On any Distribution Date on which the aggregate Stated Principal Balance of the
Mortgage Loans is less than 10% of the Cut-off Date Pool Principal Balance, the
Servicer will have the option to repurchase, in whole, from the Trust Fund all
remaining Mortgage Loans and all property acquired in respect of the Mortgage
Loans at a purchase price determined as provided in the Agreement. In the event
that no such optional termination occurs, the related obligations and
responsibilities created by the Agreement will terminate upon the later of the
maturity or other liquidation (or any advance with respect thereto) of the last
Mortgage Loan remaining in the Trust Fund or the disposition of all property in
respect thereof and the distribution to Certificateholders of all amounts
required to be distributed pursuant to the Agreement. In no event, however, will
the trust created by the Agreement continue beyond the expiration of 21 years
from the death of the last survivor of the descendants living at the date of the
Agreement of a certain person named in the Agreement.

Any term used herein that is defined in the Agreement shall have the meaning
assigned in the Agreement, and nothing herein shall be deemed inconsistent with
that meaning.

                                     F-2-6
<PAGE>

                                   ASSIGNMENT
                                   ----------

         FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and
transfer(s) unto
_______________________________________________________________________________
_______________________________________________________________________________
______________________________________________
(Please print or typewrite name and address including postal zip code of
assignee)

the Percentage Interest evidenced by the within Certificate and hereby
authorizes the transfer of registration of such Percentage Interest to assignee
on the Certificate Register of the Trust Fund.

         I (We) further direct the Trustee to issue a new Certificate of a like
denomination and Class, to the above named assignee and deliver such Certificate
to the following address:
______________________________________________________________________________.

Dated:

                                          -------------------------------------
                                          Signature by or on behalf of assignor

                            DISTRIBUTION INSTRUCTIONS

         The assignee should include the following for purposes of distribution:

         Distributions shall be made, by wire transfer or otherwise, in
immediately available funds to ________________________________________________,
for the account of ____________________________________________________________,
account number        , or, if mailed by check, to ____________________________
_______________________________________________________________________________.
Applicable statements should be mailed to _____________________________________
_______________________________________________________________________________,
_______________________________________________________________________________.

         This information is provided by ______________________________________,
the assignee named above, or __________________________________________________,
as its agent.

                                     F-2-7
<PAGE>

STATE OF ___________________                )
                                            )  ss.:
COUNTY OF __________________                )

                  On the th day of , 20 before me, a notary public in and for
said State, personally appeared , known to me who, being by me duly sworn, did
depose and say that he executed the foregoing instrument.

                                                ------------------------------
                                                         Notary Public

[Notarial Seal]

                                     F-2-8
<PAGE>

                                   EXHIBIT G-1

                    FORM OF INITIAL CERTIFICATION OF TRUSTEE

                                     [date]

[Depositor]

[Servicer]

[Seller]
____________________
____________________

       Re:      Pooling and Servicing Agreement among IndyMac MBS, Inc., as
                Depositor, IndyMac Bank, F.S.B., as Seller and Servicer,
                and Deutsche Bank National Trust Company, as Trustee and
                Supplemental Interest Trustee,
                IndyMac INDA Mortgage Loan Trust 200  -
                Mortgage Pass-Through Certificates, Series 200  -
                --------------------------------------------------------------

Gentlemen:

         In accordance with Section 2.02 of the above-captioned Pooling and
Servicing Agreement (the "Pooling and Servicing Agreement"), the undersigned, as
Trustee, hereby certifies that, as to each Mortgage Loan listed in the Mortgage
Loan Schedule (other than any Mortgage Loan listed in the attached schedule), it
has received:

         (i) the original Mortgage Note, endorsed as provided in the following
form: "Pay to the order of ________, without recourse"; and

         (ii) an executed assignment of the Mortgage (which may be included in a
blanket assignment or assignments); provided, however, that it has received no
assignment with respect to any Mortgage for which the Mortgaged Property is
located in the Commonwealth of Puerto Rico.

         Based on its review and examination and only as to the foregoing
documents, such documents appear regular on their face and to such Mortgage
Loan.

                  The Trustee has made no independent examination of any
documents contained in each Mortgage File beyond the review specifically
required in the Pooling and Servicing Agreement. The Trustee makes no
representations as to: (i) the validity, legality, sufficiency, ownership,
title, enforceability or genuineness of any of the documents contained in each
Mortgage File of any of the Mortgage Loans identified on the Mortgage Loan
Schedule, or (ii) the collectability, insurability, effectiveness or suitability
of any such Mortgage Loan.

                  Capitalized words and phrases used herein shall have the
respective meanings assigned to them in the Pooling and Servicing Agreement.

                                     G-1-1
<PAGE>

                                          DEUTSCHE BANK NATIONAL TRUST COMPANY,
                                            as Trustee

                                          By:__________________________________
                                                Name:
                                                Title:

                                     G-1-2
<PAGE>

                                   EXHIBIT G-2

          FORM OF DELAY DELIVERY CERTIFICATION (INITIAL MORTGAGE LOANS)

                                     [date]

[Depositor]

[Servicer]

[Seller]
____________________
____________________

       Re:      Pooling and Servicing Agreement among IndyMac MBS, Inc., as
                Depositor, IndyMac Bank, F.S.B., as Seller and Servicer,
                and Deutsche Bank National Trust Company, as Trustee and
                Supplemental Interest Trustee,
                IndyMac INDA Mortgage Loan Trust 200  -
                Mortgage Pass-Through Certificates, Series 200  -
                ------------------------------------------------------------

Gentlemen:

         Reference is made to the Initial Certification of Trustee relating to
the above-referenced series, with the schedule of exceptions attached thereto
(the "Schedule A"), delivered by the undersigned, as Trustee, on the Closing
Date in accordance with Section 2.02 of the above-captioned Pooling and
Servicing Agreement (the "Pooling and Servicing Agreement"). The undersigned
hereby certifies that, as to each Delay Delivery Mortgage Loan listed on
Schedule A attached hereto (other than any Mortgage Loan paid in full or listed
on Schedule B attached hereto) it has received:

         (i)      the original Mortgage Note, endorsed by the Seller or the
                  originator of such Mortgage Loan, without recourse in the
                  following form: "Pay to the order of _______________ without
                  recourse", with all intervening endorsements that show a
                  complete chain of endorsement from the originator to the
                  Seller, or, if the original Mortgage Note has been lost or
                  destroyed and not replaced, an original lost note affidavit
                  from the Seller, stating that the original Mortgage Note was
                  lost or destroyed, together with a copy of the Mortgage Note;

         (ii)     the original recorded Mortgage;

         (iii)    an executed assignment of the Mortgage to "Deutsche Bank
                  National Trust Company, as trustee under the Pooling and
                  Servicing Agreement dated as of November 1, 2007, without
                  recourse" (each such assignment, when duly and validly
                  completed, to be in recordable form and sufficient to effect
                  the assignment of and transfer to the assignee thereof, under
                  the Mortgage to which such assignment relates);

         (iv)     the original recorded assignment or assignments of the
                  Mortgage together with all interim recorded assignments of
                  such Mortgage;

                                     G-2-1
<PAGE>

         (v)      the original or copies of each assumption, modification,
                  written assurance or substitution agreement, if any, with
                  evidence of recording thereon if recordation thereof is
                  permissible under applicable law; and

         (vi)     the original or duplicate original lender's title policy and
                  all riders, if any, thereto or, in the event such original
                  title policy has not been received from the insurer, any one
                  of an original title binder, an original preliminary title
                  report or an original title commitment, or a copy thereof
                  certified by the title company, with the original policy of
                  title insurance to be delivered within one year of the Closing
                  Date.

         In the event that in connection with any Mortgage Loan for which the
Seller cannot deliver the original recorded Mortgage or all interim recorded
assignments of the Mortgage satisfying the requirements of clause (ii), (iii) or
(iv), as applicable, the Trustee has received, in lieu thereof, a true and
complete copy of such Mortgage and/or such assignment or assignments of the
Mortgage, as applicable, each certified by the Seller, the applicable title
company, escrow agent or attorney, or the originator of such Mortgage Loan, as
the case may be, to be a true and complete copy of the original Mortgage or
assignment of Mortgage submitted for recording.

         Based on its review and examination and only as to the foregoing
documents, (i) such documents appear regular on their face and related to such
Mortgage Loan, and (ii) the information set forth in items (i), (iv), (vi) and
(xv) (solely as of origination, not as of the Cut-off Date) of the definition of
the "Mortgage Loan Schedule" in Section 1.01 of the Pooling and Servicing
Agreement accurately reflects information set forth in the Mortgage File.

         The Trustee has made no independent examination of any documents
contained in each Mortgage File beyond the review specifically required in the
above-referenced Pooling and Servicing Agreement. The Trustee makes no
representations as to: (i) the validity, legality, sufficiency, ownership,
title, enforceability or genuineness of any of the documents contained in each
Mortgage File of any of the Mortgage Loans identified on the [Mortgage Loan
Schedule][Loan Number and Borrower Identification Mortgage Loan Schedule] or
(ii) the collectability, insurability, effectiveness or suitability of any such
Mortgage Loan.

         Capitalized words and phrases used herein shall have the respective
meanings assigned to them in the Pooling and Servicing Agreement.

                                          DEUTSCHE BANK NATIONAL TRUST COMPANY,
                                            as Trustee

                                          By:___________________________________
                                                Name:
                                                Title:

                                     G-2-2
<PAGE>

                                    EXHIBIT H

                     FORM OF FINAL CERTIFICATION OF TRUSTEE

                                     [date]

[Depositor]

[Servicer]

[Seller]

____________________
____________________

       Re:      Pooling and Servicing Agreement among IndyMac MBS, Inc., as
                Depositor, IndyMac Bank, F.S.B., as Seller and Servicer,
                and Deutsche Bank National Trust Company, as Trustee and
                Supplemental Interest Trustee,
                IndyMac INDA Mortgage Loan Trust 200  -
                Mortgage Pass-Through Certificates, Series 200  -
                -------------------------------------------------

Gentlemen:

         In accordance with Section 2.02 of the above-captioned Pooling and
Servicing Agreement (the "Pooling and Servicing Agreement"), the undersigned, as
Trustee, hereby certifies that as to each Mortgage Loan listed in the Mortgage
Loan Schedule (other than any Mortgage Loan paid in full or listed on the
attached Document Exception Report) it has received:

         (i) The original Mortgage Note, endorsed in the form provided in
Section 2.01(c) of the Pooling and Servicing Agreement, with all intervening
endorsements showing a complete chain of endorsement from the originator to the
Seller.

         (ii) The original recorded Mortgage.

         (iii) An executed assignment of the Mortgage in the form provided in
Section 2.01(c) of the Pooling and Servicing Agreement; provided, however, that
it has received no assignment with respect to any Mortgage for which the
Mortgaged Property is located in the Commonwealth of Puerto Rico, or, if the
Depositor has certified or the Trustee otherwise knows that the Mortgage has not
been returned from the applicable recording office, a copy of the assignment of
the Mortgage (excluding information to be provided by the recording office);
provided further, however, that the Trustee does not certify with respect to due
execution of each executed assignment.

         (iv) The original or duplicate original recorded assignment or
assignments of the Mortgage showing a complete chain of assignment from the
originator to the Seller.

         (v) The original or duplicate original lender's title policy and all
riders thereto or, any one of an original title binder, an original preliminary
title report or an original title commitment, or a copy thereof certified by the
title company.

         Based on its review and examination and only as to the foregoing
documents, (a) such documents appear regular on their face and related to such
Mortgage Loan, and (b) the information set forth in items

                                      H-1
<PAGE>

(i), (ii), (iii), (iv), (vi) and (xv) (solely as of origination, not as of the
Cut-off Date) of the definition of the "Mortgage Loan Schedule" in
Section 1.01 of the Pooling and Servicing Agreement accurately reflects
information set forth in the Mortgage File.

         The Trustee has made no independent examination of any documents
contained in each Mortgage File beyond the review specifically required in the
Pooling and Servicing Agreement. The Trustee makes no representations as to: (i)
the validity, legality, sufficiency, ownership, title, enforceability or
genuineness of any of the documents contained in each Mortgage File of any of
the Mortgage Loans identified on the Mortgage Loan Schedule, or (ii) the
collectability, insurability, effectiveness or suitability of any such Mortgage
Loan. Notwithstanding anything herein to the contrary, the Trustee has made no
determination and makes no representations as to whether (i) any endorsement is
sufficient to transfer all right, title and interest of the party so endorsing,
as noteholder or assignee thereof, in and to that Mortgage Note or (ii) any
assignment is in recordable form or sufficient to effect the assignment of and
transfer to the assignee thereof, under the Mortgage to which the assignment
relates.

         Capitalized words and phrases used herein shall have the respective
meanings assigned to them in the Pooling and Servicing Agreement.

                                          DEUTSCHE BANK NATIONAL TRUST COMPANY,
                                            as Trustee

                                          By:__________________________________
                                                Name:
                                                Title:

                                      H-2
<PAGE>

                                    EXHIBIT I

                               TRANSFER AFFIDAVIT

                                IndyMac MBS, Inc.
                     IndyMac INDA Mortgage Loan Trust 200 -
                       Mortgage Pass-Through Certificates
                                  Series 200_-_

STATE OF CALIFORNIA      )
                         :  ss.:
COUNTY OF _____________  )

         The undersigned, being first duly sworn, deposes and says as follows:

         1. The undersigned is an officer of , the proposed Transferee of an
Ownership Interest in a Class A-R Certificate (the "Certificate") issued
pursuant to the Pooling and Servicing Agreement, (the "Agreement"), relating to
the above-referenced Series, by and among IndyMac MBS, Inc., as depositor (the
"Depositor"), IndyMac Bank, F.S.B., as seller and servicer and Deutsche Bank
National Trust Company, as Trustee and Supplemental Interest Trustee.
Capitalized terms used, but not defined herein or in Exhibit 1 hereto, shall
have the meanings ascribed to such terms in the Agreement. The Transferee has
authorized the undersigned to make this affidavit on behalf of the Transferee.

         2. The Transferee is, as of the date hereof, and will be, as of the
date of the Transfer, a Permitted Transferee. The Transferee is acquiring its
Ownership Interest in the Certificate for its own account.

         3. The Transferee has been advised of, and understands that (i) a tax
will be imposed on Transfers of the Certificate to Persons that are not
Permitted Transferees; (ii) such tax will be imposed on the transferor, or, if
such Transfer is through an agent (which includes a broker, nominee or
middleman) for a Person that is not a Permitted Transferee, on the agent; and
(iii) the Person otherwise liable for the tax shall be relieved of liability for
the tax if the subsequent Transferee furnished to such Person an affidavit that
such subsequent Transferee is a Permitted Transferee and, at the time of
Transfer, such Person does not have actual knowledge that the affidavit is
false.

         4. The Transferee has been advised of, and understands that a tax will
be imposed on a "pass-through entity" holding the Certificate if at any time
during the taxable year of the pass-through entity a Person that is not a
Permitted Transferee is the record holder of an interest in such entity. The
Transferee understands that such tax will not be imposed for any period with
respect to which the record holder furnishes to the pass-through entity an
affidavit that such record holder is a Permitted Transferee and the pass-through
entity does not have actual knowledge that such affidavit is false. (For this
purpose, a "pass-through entity" includes a regulated investment company, a real
estate investment trust or common trust fund, a partnership, trust or estate,
and certain cooperatives and, except as may be provided in Treasury Regulations,
persons holding interests in pass-through entities as a nominee for another
Person.)

         5. The Transferee has reviewed the provisions of Section 5.02(c) of the
Agreement (attached hereto as Exhibit 2 and incorporated herein by reference)
and understands the legal consequences of the acquisition of an Ownership
Interest in the Certificate including, without limitation, the restrictions on
subsequent Transfers and the provisions regarding voiding the Transfer and
mandatory

                                      I-1
<PAGE>

sales. The Transferee expressly agrees to be bound by and to abide by the
provisions of Section 5.02(c) of the Agreement and the restrictions noted on the
face of the Certificate. The Transferee understands and agrees that any breach
of any of the representations included herein shall render the Transfer to the
Transferee contemplated hereby null and void.

         6. The Transferee agrees to require a Transfer Affidavit from any
Person to whom the Transferee attempts to Transfer its Ownership Interest in the
Certificate, and in connection with any Transfer by a Person for whom the
Transferee is acting as nominee, trustee or agent, and the Transferee will not
Transfer its Ownership Interest or cause any Ownership Interest to be
Transferred to any Person that the Transferee knows is not a Permitted
Transferee. In connection with any such Transfer by the Transferee, the
Transferee agrees to deliver to the Trustee a certificate substantially in the
form set forth as Exhibit J to the Agreement (a "Transferor Certificate") to the
effect that such Transferee has no actual knowledge that the Person to which the
Transfer is to be made is not a Permitted Transferee.

         7. The Transferee does not have the intention to impede the assessment
or collection of any tax legally required to be paid with respect to the
Certificate.

         8. The Transferee's taxpayer identification number is .

         9. The Transferee is a U.S. Person as defined in Code Section
7701(a)(30).

         10. The Transferee is aware that the Certificate may be a "noneconomic
residual interest" within the meaning of proposed Treasury regulations
promulgated pursuant to the Code and that the transferor of a noneconomic
residual interest will remain liable for any taxes due with respect to the
income on such residual interest, unless no significant purpose of the transfer
was to impede the assessment or collection of tax.

         11. The Transferee is not a foreign permanent establishment or fixed
base (within the meaning of an applicable income tax treaty) of a U.S. taxpayer.

         12. The Transferee will not transfer the Certificates, directly or
indirectly, to a foreign permanent establishment or fixed base (within the
meaning of an applicable income tax treaty) of the Transferee or another U.S.
taxpayer.

         13. The Transferee will not cause income from the Certificates to be
attributable to a foreign permanent establishment or fixed base (within the
meaning of an applicable income tax treaty) of the Transferee or another U.S.
taxpayer.

         14. Either:

                  (a) (i) At the time of the transfer, and at the close of each
         of the Transferee's two fiscal years preceding the Transferee's fiscal
         year of transfer, the Transferee's gross assets for financial reporting
         purposes exceed $100 million and its net assets for financial reporting
         purposes exceed $10 million. For purposes of the preceding sentence,
         the gross assets and net assets of a Transferee do not include any
         obligation of any Related Person, as defined below, or any other asset
         if a principal purpose for holding or acquiring the other asset is to
         permit the Transferee to satisfy the conditions of this paragraph
         15(a); (ii) The Transferee is an Eligible Corporation, as defined
         below, and hereby agrees that any subsequent transfer of the interest
         will be to another Eligible Corporation in a transaction that satisfies
         this Transfer Affidavit, including this paragraph 15(a); and (iii) The
         Transferee has not given the Transferor any reason to know that the

                                      I-2
<PAGE>

         Transferee will not honor the restrictions on subsequent transfers of
         the residual interest or that the Transferee cannot or will not pay any
         taxes associated with the residual interest; or

                  (b)(i) The Transferee is a United States Person; (ii) The
         present value of the anticipated tax liabilities associated with
         holding the residual interest does not exceed the sum of: (A) The
         present value of any consideration given to the Transferee to acquire
         the interest; (B) The present value of the expected future
         distributions on the interest; and (C) The present value of the
         anticipated tax savings associated with holding the interest as any
         REMIC generates losses; and (iii) For purposes of calculating the
         aforementioned present values: (A) The transferee has assumed that it
         pays tax at a rate equal to the highest rate of tax specified in Code
         Section 11(b)(1) (unless the Transferee has been subject to the
         alternative minimum tax under Code Section 55 in the preceding two
         years and will compute its taxable income in the current taxable year
         using the alternative minimum tax rate, in which case the Transferee
         can assume that it pays tax at the rate specified in Code Section
         55(b)(1)(B) provided the Transferee states in this Transfer Affidavit
         that it is using such alternate rate and that has been subject to the
         alternative minimum tax under Code Section 55 in the preceding two
         years and will compute its taxable income in the current taxable year
         using the alternative minimum tax rate):and (B) The Transferee uses a
         discount rate equal to the Federal short-term rate prescribed by
         section 1274(d) for the month of the transfer and the compounding
         period used by the Transferee.

         The term "Eligible Corporation" means any domestic C corporation (as
defined in section 1361(a)(2) of the Code) other than a corporation which is
exempt from, or is not subject to, tax under section 11 of the Code, an entity
described in section 851(a) or 856(a) of the Code, a REMIC; or an organization
to which part I, subchapter T, chapter 1, subtitle A of the Code applies. The
Term "Related Person" means any person that bears a relationship to the
Transferee enumerated in section 267(b) or 707(b)(1) of the Code, using "20
percent" instead of "50 percent" where it appears under the provisions; or is
under common control (within the meaning of section 52(a) and (b) of the Code)
with the Transferee.

         15. Either (i) the Transferee is not an employee benefit plan that is
subject to ERISA or a plan that is subject to Section 4975 of the Code, and the
Transferee is not acting on behalf of or with plan assets of such a plan; or
(ii) the Transferee is an insurance company that is investing funds contained in
an "insurance company general account" (as such term is defined in Section V(e)
of Prohibited Transaction Class Exemption 95-60 ("PTCE 95-60") and the purchase
and holding of the Class A-R Certificate satisfy the requirements for exemptive
relief under Sections I and III of PTCE 95-60.

                                 *     *     *

                                      I-3
<PAGE>

         IN WITNESS WHEREOF, the Transferee has caused this instrument to be
executed on its behalf, pursuant to authority of its Board of Directors, by its
duly authorized officer and its corporate seal to be hereunto affixed, duly
attested, this _____ day of ___________ , 20__.

                                      -----------------------------------------
                                         Print Name of Transferee

                                      By:______________________________________
                                             Name:
                                             Title:

[Corporate Seal]

ATTEST:

[Assistant] Secretary

         Personally appeared before me the above-named _______, known or proved
to me to be the same person who executed the foregoing instrument and to be the
__________ of the Transferee, and acknowledged that he executed the same as his
free act and deed and the free act and deed of the Transferee.

         Subscribed and sworn before me this ____ day of ______, 20__.

                                    -------------------------------------------
                                    NOTARY PUBLIC

                                    My Commission expires the ___ day of ______,
                                    20__.

                                      I-4
<PAGE>

                                                                      EXHIBIT 1
                                                                   to EXHIBIT I

                               Certain Definitions
                               -------------------

         "Ownership Interest": As to any Certificate, any ownership interest in
such Certificate, including any interest in such Certificate as the Holder
thereof and any other interest therein, whether direct or indirect, legal or
beneficial.

         "Permitted Transferee": Any Person other than (i) the United States,
any State or political subdivision thereof, or any agency or instrumentality of
any of the foregoing, (ii) a foreign government, International Organization or
any agency or instrumentality of either of the foregoing, (iii) an organization
(except certain farmers' cooperatives described in Code Section 521) that is
exempt from tax imposed by Chapter 1 of the Code (including the tax imposed by
Code Section 511 on unrelated business taxable income) on any excess inclusions
(as defined in Code Section 860E(c)(1)) with respect to any Restricted
Certificate, (iv) a rural electric and telephone cooperatives described in Code
Section 1381(a)(2)(c), (v) an "electing large partnership" as defined in Code
Section 775 of (vi) a Person that is not a U.S. Person, and (vii) any other
Person so designated by the Depositor based upon an Opinion of Counsel that the
Transfer of an Ownership Interest in a Residual Certificate to such Person may
cause any REMIC to fail to qualify as a REMIC at any time that certain
Certificates are Outstanding. The terms "United States," "State" and
"International Organization" shall have the meanings set forth in Code Section
7701 or successor provisions. A corporation will not be treated as an
instrumentality of the United States or of any State or political subdivision
thereof if all of its activities are subject to tax, and, with the exception of
the FHLMC, a majority of its board of directors is not selected by such
governmental unit.

         "Person": Any individual, corporation, partnership, joint venture,
limited liability company, bank, joint stock company, trust (including any
beneficiary thereof), unincorporated organization or government or any agency or
political subdivision thereof.

         "Transfer": Any direct or indirect transfer or sale of any Ownership
Interest in a Certificate, including the acquisition of a Certificate by the
Depositor.

         "Transferee": Any Person who is acquiring by Transfer any Ownership
Interest in a Certificate.

                                      I-5
<PAGE>

                                                                      EXHIBIT 2
                                                                   to EXHIBIT I

                        Section 5.02(c) of the Agreement
                                --
                  (c) Each Person who has or who acquires any Ownership Interest
in a Residual Certificate shall be deemed by the acceptance or acquisition of
such Ownership Interest to have agreed to be bound by the following provisions,
and the rights of each Person acquiring any Ownership Interest in a Residual
Certificate are expressly subject to the following provisions:

                           (i) Each Person holding or acquiring any Ownership
                  Interest in a Residual Certificate shall be a Permitted
                  Transferee and shall promptly notify the Trustee of any change
                  or impending change in its status as a Permitted Transferee.

                           (ii) No Ownership Interest in a Residual Certificate
                  may be registered on the Closing Date or thereafter
                  transferred, and the Trustee shall not register the Transfer
                  of any Residual Certificate unless, in addition to the
                  certificates required to be delivered to the Trustee under
                  subparagraph (b) above, the Trustee shall have been furnished
                  with an affidavit (a "Transfer Affidavit") of the initial
                  owner or the proposed transferee in the form attached hereto
                  as Exhibit I.

                           (iii) Each Person holding or acquiring any Ownership
                  Interest in a Residual Certificate shall agree (A) to obtain a
                  Transfer Affidavit from any other Person to whom such Person
                  attempts to Transfer its Ownership Interest in a Residual
                  Certificate, (B) to obtain a Transfer Affidavit from any
                  Person for whom such Person is acting as nominee, trustee or
                  agent in connection with any Transfer of a Residual
                  Certificate and (C) not to Transfer its Ownership Interest in
                  a Residual Certificate or to cause the Transfer of an
                  Ownership Interest in a Residual Certificate to any other
                  Person if it has actual knowledge that such Person is not a
                  Permitted Transferee.

                           (iv) Any attempted or purported Transfer of any
                  Ownership Interest in a Residual Certificate in violation of
                  the provisions of this Section 5.02(c) shall be absolutely
                  null and void and shall vest no rights in the purported
                  Transferee. If any purported transferee shall become a Holder
                  of a Residual Certificate in violation of the provisions of
                  this Section 5.02(c), then the last preceding Permitted
                  Transferee shall be restored to all rights as Holder thereof
                  retroactive to the date of registration of Transfer of such
                  Residual Certificate. The Trustee shall be under no liability
                  to any Person for any registration of Transfer of a Residual
                  Certificate that is in fact not permitted by Section 5.02(b)
                  and this Section 5.02(c) or for making any payments due on
                  such Certificate to the Holder thereof or taking any other
                  action with respect to such Holder under the provisions of
                  this Agreement so long as the Transfer was registered after
                  receipt of the Transfer Affidavit, Transferor Certificate and
                  either the Rule 144A Letter or the Investment Letter. The
                  Trustee shall be entitled but not obligated to recover from
                  any Holder of a Residual Certificate that was in fact not a
                  Permitted Transferee at the time it became a Holder or, at
                  such subsequent time as it became other than a Permitted
                  Transferee, all payments made on such Residual Certificate at
                  and after either such time. Any such payments so recovered by
                  the Trustee shall be paid and delivered by the Trustee to the
                  last preceding Permitted Transferee of such Certificate.

                                      I-6

<PAGE>

                           (v) The Depositor shall use its best efforts to make
                  available, upon receipt of written request from the Trustee,
                  all information necessary to compute any tax imposedunder
                  Section 860E(e) of the Code as a result of a Transfer of an
                  Ownership Interest in a Residual Certificate to any Holder who
                  is not a Permitted Transferee.

                                      I-7
<PAGE>

                                     EXHIBIT J

                         FORM OF TRANSFEROR CERTIFICATE

                                                              __________, 200__

IndyMac MBS, Inc.
155 North Lake Avenue, 7th Floor
Pasadena, CA  91101
Attention:  Secondary Marketing, Transaction Management

Deutsche Bank National Trust Company
c/o DB Services Tennessee
648 Grassmere Park Road
Nashville, TN 37211-3658
Attention: Transfer Unit, [Series 200 -]

        Re:     IndyMac MBS, Inc.
                IndyMac INDA Mortgage Loan Trust 200  -
                Mortgage Pass-Through Certificates, Series 200 -, Class
                -------------------------------------------------------

Ladies and Gentlemen:

                  In connection with our disposition of the above Certificates
we certify that (a) we understand that the Certificates have not been registered
under the Securities Act of 1933, as amended (the "Act"), and are being disposed
by us in a transaction that is exempt from the registration requirements of the
Act, (b) we have not offered or sold any Certificates to, or solicited offers to
buy any Certificates from, any person, or otherwise approached or negotiated
with any person with respect thereto, in a manner that would be deemed, or taken
any other action which would result in, a violation of Section 5 of the Act and
(c) to the extent we are disposing of a Class A-R Certificate, we have no
knowledge the Transferee is not a Permitted Transferee.

                                                Very truly yours,

                                                -------------------------------
                                                Print Name of Transferor

                                                By: ___________________________
                                                         Authorized Officer

                                      J-1
<PAGE>

                                    EXHIBIT K

                    FORM OF INVESTMENT LETTER (NON-RULE 144A)

                                                              __________, 200__

IndyMac MBS, Inc.
155 North Lake Avenue, 7th Floor
Pasadena, CA  91101
Attention:  Secondary Marketing, Transaction Management

Deutsche Bank National Trust Company
c/o DB Services Tennessee
648 Grassmere Park Road
Nashville, TN 37211-3658
Attention: Transfer Unit, [Series 200 -]

       Re:      IndyMac MBS, Inc.
                IndyMac INDA Mortgage Loan Trust 200  -
                Mortgage Pass-Through Certificates, Series 200 -, Class
                -------------------------------------------------------

Ladies and Gentlemen:

                  In connection with our acquisition of the above-referenced
Certificates we certify that (a) we understand that the Certificates are not
being registered under the Securities Act of 1933, as amended (the "Act"), or
any state securities laws and are being transferred to us in a transaction that
is exempt from the registration requirements of the Act and any such laws, (b)
we are an "accredited investor," as defined in Regulation D under the Act, and
have such knowledge and experience in financial and business matters that we are
capable of evaluating the merits and risks of investments in the Certificates,
(c) we have had the opportunity to ask questions of and receive answers from the
Depositor concerning the purchase of the Certificates and all matters relating
thereto or any additional information deemed necessary to our decision to
purchase the Certificates, (d) either (i) we are not an employee benefit plan
that is subject to the Employee Retirement Income Security Act of 1974, as
amended, or a plan or arrangement that is subject to Section 4975 of the
Internal Revenue Code of 1986, as amended, nor are we acting on behalf of any
such plan or arrangement or using the assets of any such plan or arrangement to
effect such acquisition or (ii) [in the case of a Certificate that has been the
subject of an ERISA-Qualifying Underwriting] we are an insurance company which
is purchasing such Certificates with funds contained in an "insurance company
general account" (as such term is defined in Section V(e) of Prohibited
Transaction Class Exemption 95-60 ("PTCE 95-60")) and the purchase and holding
of such Certificates are covered under Sections I and III of PTCE 95-60, (e) we
are acquiring the Certificates for investment for our own account and not with a
view to any distribution of such Certificates (but without prejudice to our
right at all times to sell or otherwise dispose of the Certificates in
accordance with clause (g) below), (f) we have not offered or sold any
Certificates to, or solicited offers to buy any Certificates from, any person,
or otherwise approached or negotiated with any person with respect thereto, or
taken any other action which would result in a violation of Section 5 of the
Act, (g) we will not sell, transfer or otherwise dispose of any Certificates
unless (1) such sale, transfer or other disposition is made pursuant to an
effective registration statement under the Act or is exempt from such
registration requirements, and if requested, we will at our expense provide an
opinion of counsel satisfactory to the addressees of this Certificate that such
sale, transfer or other disposition may be made pursuant to an exemption from
the

                                      K-1
<PAGE>

Act, (2) the purchaser or transferee of such Certificate has executed and
delivered to you a certificate to substantially the same effect as this
certificate, and (3) the purchaser or transferee has otherwise complied with any
conditions for transfer set forth in the Pooling and Servicing Agreement and (h)
if we are a corporation purchasing the Certificates in the State of California,
we have a net worth of at least $14,000,000 according to our most recent audited
financial statements.

                                                Very truly yours,

                                                ------------------------------
                                                Print Name of Transferee

                                                By: ___________________________
                                                         Authorized Officer

                                      K-2
<PAGE>

                                    EXHIBIT L

                            FORM OF RULE 144A LETTER

                                                            ____________, 200__

IndyMac MBS, Inc.
155 North Lake Avenue, 7th Floor
Pasadena, CA  91101
Attention:  Secondary Marketing, Transaction Management

Deutsche Bank National Trust Company
c/o DB Services Tennessee
648 Grassmere Park Road
Nashville, TN 37211-3658
Attention: Transfer Unit, [Series 200 -]

       Re:      IndyMac MBS, Inc.
                IndyMac INDA Mortgage Loan Trust 200  -
                Mortgage Pass-Through Certificates, Series 200 -, Class
                -------------------------------------------------------

Ladies and Gentlemen:

                  In connection with our acquisition of the above-referenced
Certificates we certify that (a) we understand that the Certificates are not
being registered under the Securities Act of 1933, as amended (the "Act"), or
any state securities laws and are being transferred to us in a transaction that
is exempt from the registration requirements of the Act and any such laws, (b)
we have such knowledge and experience in financial and business matters that we
are capable of evaluating the merits and risks of investments in the
Certificates, (c) we have had the opportunity to ask questions of and receive
answers from the Depositor concerning the purchase of the Certificates and all
matters relating thereto or any additional information deemed necessary to our
decision to purchase the Certificates, (d) either (i) we are not an employee
benefit plan that is subject to the Employee Retirement Income Security Act of
1974, as amended, or a plan or arrangement that is subject to Section 4975 of
the Internal Revenue Code of 1986, as amended, nor are we acting on behalf of
any such plan or arrangement or using the assets of any such plan or arrangement
to effect such acquisition, or (ii) [in the case of a Certificate that has been
the subject of an ERISA-Qualifying Underwriting] we are purchasing the
Certificates with funds contained in an "insurance company general account" (as
defined in Section V(e) of Prohibited Transaction Class Exemption 95-60 ("PTCE
95-60")) and our purchase and holding of the Certificates satisfy the
requirements for exemptive relief under Sections I and III of PTCE 95-60, (e) we
have not, nor has anyone acting on our behalf offered, transferred, pledged,
sold or otherwise disposed of the Certificates, any interest in the Certificates
or any other similar security to, or solicited any offer to buy or accept a
transfer, pledge or other disposition of the Certificates, any interest in the
Certificates or any other similar security from, or otherwise approached or
negotiated with respect to the Certificates, any interest in the Certificates or
any other similar security with, any person in any manner, or made any general
solicitation by means of general advertising or in any other manner, or taken
any other action, that would constitute a distribution of the Certificates under
the Act or that would render the disposition of the Certificates a violation of
Section 5 of the Act or require registration pursuant thereto, nor will act, nor
has authorized or will authorize any person to act, in such manner with respect
to the Certificates, (f) we are a "qualified institutional buyer" as that term
is defined in Rule 144A under the Act ("Rule 144A") and have

                                      L-1
<PAGE>

completed either of the forms of certification to that effect attached hereto as
Annex 1 or Annex 2, (g) we are aware that the sale to us is being made in
reliance on Rule 144A, (h) we are acquiring the Certificates for our own account
or for resale pursuant to Rule 144A and further, understand that such
Certificates may be resold, pledged or transferred only (A) to a person
reasonably believed to be a qualified institutional buyer that purchases for its
own account or for the account of a qualified institutional buyer to whom notice
is given that the resale, pledge or transfer is being made in reliance on Rule
144A, or (B) pursuant to another exemption from registration under the Act and
(i) if we are a corporation purchasing the Certificates in the State of
California, we have a net worth of at least $14,000,000 according to our most
recent audited financial statements.

                                                Very truly yours,

                                                ------------------------
                                                Print Name of Transferee

                                                By:_______________________
                                                      Authorized Officer

                                      L-2
<PAGE>

                              ANNEX 1 TO EXHIBIT L

            QUALIFIED INSTITUTIONAL BUYER STATUS UNDER SEC RULE 144A
            --------------------------------------------------------

          [For Transferees Other Than Registered Investment Companies]

                  The undersigned (the "Buyer") hereby certifies as follows to
the parties listed in the Rule 144A Transferee Certificate to which this
certification relates with respect to the Certificates described therein:

         1. As indicated below, the undersigned is the President, Chief
Financial Officer, Senior Vice President or other executive officer of the
Buyer.

         2. In connection with purchases by the Buyer, the Buyer is a "qualified
institutional buyer" as that term is defined in Rule 144A under the Securities
Act of 1933, as amended ("Rule 144A") because (i) the Buyer owned and/or
invested on a discretionary basis $ (1) in securities (except for the excluded
securities referred to below) as of the end of the Buyer's most recent fiscal
year (such amount being calculated in accordance with Rule 144A and (ii) the
Buyer satisfies the criteria in the category marked below.

                  ___ Corporation, etc. The Buyer is a corporation (other than a
         bank, savings and loan association or similar institution),
         Massachusetts or similar business trust, partnership, or charitable
         organization described in Section 501(c)(3) of the Internal Revenue
         Code of 1986, as amended.

                  ___ Bank. The Buyer (a) is a national bank or banking
         institution organized under the laws of any State, territory or the
         District of Columbia, the business of which is substantially confined
         to banking and is supervised by the State or territorial banking
         commission or similar official or is a foreign bank or equivalent
         institution, and (b) has an audited net worth of at least $25,000,000
         as demonstrated in its latest annual financial statements, a copy of
         which is attached hereto.

                  ___ Savings and Loan. The Buyer (a) is a savings and loan
         association, building and loan association, cooperative bank, homestead
         association or similar institution, which is supervised and examined by
         a State or Federal authority having supervision over any such
         institutions or is a foreign savings and loan association or equivalent
         institution and (b) has an audited net worth of at least $25,000,000 as
         demonstrated in its latest annual financial statements, a copy of which
         is attached hereto.

                  ___ Broker-dealer. The Buyer is a dealer registered pursuant
         to Section 15 of the Securities Exchange Act of 1934.

                  ___ Insurance Company. The Buyer is an insurance company whose
         primary and predominant business activity is the writing of insurance
         or the reinsuring of risks underwritten by insurance companies and
         which is subject to supervision by the

_______________________
(1)  Buyer must own and/or invest on a discretionary basis at least $100,000,000
     in securities unless Buyer is a dealer, and, in that case, Buyer must own
     and/or invest on a discretionary basis at least $10,000,000 in securities.

                                      L-3
<PAGE>

         insurance commissioner or a similar official or agency of a State,
         territory or the District of Columbia.

                  ___ State or Local Plan. The Buyer is a plan established and
         maintained by a State, its political subdivisions, or any agency or
         instrumentality of the State or its political subdivisions, for the
         benefit of its employees.

                  ___ ERISA Plan. The Buyer is an employee benefit plan within
         the meaning of Title I of the Employee Retirement Income Security Act
         of 1974.

                  ___ Investment Advisor. The Buyer is an investment advisor
         registered under the Investment Advisors Act of 1940.

                  ___ Small Business Investment Company. Buyer is a small
         business investment company licensed by the U.S. Small Business
         Administration under Section 301(c) or (d) of the Small Business
         Investment Act of 1958.

                  ___ Business Development Company. Buyer is a business
         development company as defined in Section 202(a)(22) of the Investment
         Advisors Act of 1940.

         3. The term "securities" as used herein does not include (i) securities
of issuers that are affiliated with the Buyer, (ii) securities that are part of
an unsold allotment to or subscription by the Buyer, if the Buyer is a dealer,
(iii) securities issued or guaranteed by the U.S. or any instrumentality
thereof, (iv) bank deposit notes and certificates of deposit, (v) loan
participations, (vi) repurchase agreements, (vii) securities owned but subject
to a repurchase agreement and (viii) currency, interest rate and commodity
swaps.

         4. For purposes of determining the aggregate amount of securities owned
and/or invested on a discretionary basis by the Buyer, the Buyer used the cost
of such securities to the Buyer and did not include any of the securities
referred to in the preceding paragraph, except (i) where the Buyer reports its
securities holdings in its financial statements on the basis of their market
value, and (ii) no current information with respect to the cost of those
securities has been published. If clause (ii) in the preceding sentence applies,
the securities may be valued at market. Further, in determining such aggregate
amount, the Buyer may have included securities owned by subsidiaries of the
Buyer, but only if such subsidiaries are consolidated with the Buyer in its
financial statements prepared in accordance with generally accepted accounting
principles and if the investments of such subsidiaries are managed under the
Buyer's direction. However, such securities were not included if the Buyer is a
majority-owned, consolidated subsidiary of another enterprise and the Buyer is
not itself a reporting company under the Securities Exchange Act of 1934, as
amended.

         5. The Buyer acknowledges that it is familiar with Rule 144A and
understands that the seller to it and other parties related to the Certificates
are relying and will continue to rely on the statements made herein because one
or more sales to the Buyer may be in reliance on Rule 144A.

         6. Until the date of purchase of the Rule 144A Securities, the Buyer
will notify each of the parties to which this certification is made of any
changes in the information and conclusions herein. Until such notice is given,
the Buyer's purchase of the Certificates will constitute a reaffirmation of this
certification as of the date of such purchase. In addition, if the Buyer is a
bank or savings and loan is provided above, the Buyer agrees that it will
furnish to such parties updated annual financial statements promptly after they
become available.

                                      L-4
<PAGE>

                                        ---------------------------------------
                                        Print Name of Buyer

                                        By:_____________________________________
                                               Name:
                                               Title:

                                        ________________________________________
                                        Date:

                                      L-5
<PAGE>

                              ANNEX 2 TO EXHIBIT L

            QUALIFIED INSTITUTIONAL BUYER STATUS UNDER SEC RULE 144A
            --------------------------------------------------------

           [For Transferees That are Registered Investment Companies]

         The undersigned (the "Buyer") hereby certifies as follows to the
parties listed in the Rule 144A Transferee Certificate to which this
certification relates with respect to the Certificates described therein:

         1. As indicated below, the undersigned is the President, Chief
Financial Officer or Senior Vice President of the Buyer or, if the Buyer is a
"qualified institutional buyer" as that term is defined in Rule 144A under the
Securities Act of 1933, as amended ("Rule 144A") because Buyer is part of a
Family of Investment Companies (as defined below), is such an officer of the
Adviser.

         2. In connection with purchases by Buyer, the Buyer is a "qualified
institutional buyer" as defined in SEC Rule 144A because (i) the Buyer is an
investment company registered under the Investment Company Act of 1940, as
amended and (ii) as marked below, the Buyer alone, or the Buyer's Family of
Investment Companies, owned at least $100,000,000 in securities (other than the
excluded securities referred to below) as of the end of the Buyer's most recent
fiscal year. For purposes of determining the amount of securities owned by the
Buyer or the Buyer's Family of Investment Companies, the cost of such securities
was used, except (i) where the Buyer or the Buyer's Family of Investment
Companies reports its securities holdings in its financial statements on the
basis of their market value, and (ii) no current information with respect to the
cost of those securities has been published. If clause (ii) in the preceding
sentence applies, the securities may be valued at market.

                  ___ The Buyer owned $        in securities (other than the
         excluded securities referred to below) as of the end of the Buyer's
         most recent fiscal year (such amount being calculated in accordance
         with Rule 144A).

                  ___ The Buyer is part of a Family of Investment Companies
         which owned in the aggregate $       in securities (other than the
         excluded securities referred to below) as of the end of the Buyer's
         most recent fiscal year (such amount being calculated in accordance
         with Rule 144A).

         3. The term "Family of Investment Companies" as used herein means two
or more registered investment companies (or series thereof) that have the same
investment adviser or investment advisers that are affiliated (by virtue of
being majority owned subsidiaries of the same parent or because one investment
adviser is a majority owned subsidiary of the other).

         4. The term "securities" as used herein does not include (i) securities
of issuers that are affiliated with the Buyer or are part of the Buyer's Family
of Investment Companies, (ii) securities issued or guaranteed by the U.S. or any
instrumentality thereof, (iii) bank deposit notes and certificates of deposit,
(iv) loan participations, (v) repurchase agreements, (vi) securities owned but
subject to a repurchase agreement and (vii) currency, interest rate and
commodity swaps.

         5. The Buyer is familiar with Rule 144A and understands that the
parties listed in the Rule 144A Transferee Certificate to which this
certification relates are relying and will continue to rely on the statements
made herein because one or more sales to the Buyer will be in reliance on Rule
144A. In addition, the Buyer will only purchase for the Buyer's own account.

                                      L-6
<PAGE>

         6. Until the date of purchase of the Certificates, the undersigned will
notify the parties listed in the Rule 144A Transferee Certificate to which this
certification relates of any changes in the information and conclusions herein.
Until such notice is given, the Buyer's purchase of the Certificates will
constitute a reaffirmation of this certification by the undersigned as of the
date of such purchase.

                                        ---------------------------------------
                                        Print Name of Buyer

                                        By:____________________________________
                                               Name:
                                               Title:

                                        _______________________________________
                                        Date:

                                      L-7
<PAGE>

                                    EXHIBIT M

                               REQUEST FOR RELEASE
                                  (for Trustee)

                                IndyMac MBS, Inc.
                     IndyMac INDA Mortgage Loan Trust 200 -
                       Mortgage Pass-Through Certificates
                                  Series 200_-_

Loan Information
----------------

       Name of Mortgagor:

       Servicer
       Loan No.:            _______________________

Trustee
-------

       Name:                _______________________

       Address:             _______________________

                            _______________________

Trustee
Mortgage File No.:

         The undersigned Servicer hereby acknowledges that it has received from
Deutsche Bank National Trust Company, as Trustee for the Holders of Mortgage
Pass-Through Certificates, of the above-referenced Series, the documents
referred to below (the "Documents"). All capitalized terms not otherwise defined
in this Request for Release shall have the meanings given them in the Pooling
and Servicing Agreement (the "Pooling and Servicing Agreement") relating to the
above-referenced Series among the Trustee, the Supplemental Interest Trustee,
IndyMac Bank, F.S.B., as Seller and Servicer and IndyMac MBS, Inc., as
Depositor.

( )      Mortgage Note dated __________, 20__, in the original principal sum of
         $________, made by _____________. payable to, or endorsed to the order
         of, the Trustee.

( )      Mortgage recorded on _____________ as instrument no. _______________ in
         the County Recorder's Office of the County of ____________, State of
         ___________ in book/reel/docket _____________ of official records at
         page/image __________.

( )      Deed of Trust recorded on ______________ as instrument
         no.______________ in the County Recorder's Office of the County of
         ___________, State of ____________ in book/reel/docket ____________ of
         official records at page/image ____________.

                                      M-1
<PAGE>

( )      Assignment of Mortgage or Deed of Trust to the Trustee, recorded on
         __________ as instrument no.__________ in the County Recorder's Office
         of the County of _______, State of ________ in book/reel/docket
         _________ of official records at page/image __________.

( )      Other documents, including any amendments, assignments or other
         assumptions of the Mortgage Note or Mortgage.

( )

( )

( )

( )

         The undersigned Servicer hereby acknowledges and agrees as follows:

                           (1) The Servicer shall hold and retain possession of
                  the Documents in trust for the benefit of the Trustee, solely
                  for the purposes provided in the Agreement.

                           (2) The Servicer shall not cause or knowingly permit
                  the Documents to become subject to, or encumbered by, any
                  claim, liens, security interest, charges, writs of attachment
                  or other impositions nor shall the Servicer assert or seek to
                  assert any claims or rights of setoff to or against the
                  Documents or any proceeds thereof.

                           (3) The Servicer shall return each and every Document
                  previously requested from the Mortgage File to the Trustee
                  when the need therefor no longer exists, unless the Mortgage
                  Loan relating to the Documents has been liquidated and the
                  proceeds thereof have been remitted to the Certificate Account
                  and except as expressly provided in the Agreement.

                           (4) The Documents and any proceeds thereof, including
                  any proceeds of proceeds, coming into the possession or
                  control of the Servicer shall at all times be earmarked for
                  the account of the Trustee, and the Servicer shall keep the
                  Documents and any proceeds separate and distinct from all
                  other property in the Servicer's possession, custody or
                  control.

                                          INDYMAC BANK, F.S.B.

                                          By: ___________________
                                                 Name:
                                                 Title:

Date:       , 20

                                      M-2
<PAGE>

                                    EXHIBIT N

                        REQUEST FOR RELEASE OF DOCUMENTS

To:      Deutsche Bank National Trust Company

Attn:    Mortgage Custody Services

Re:      The Pooling and Servicing Agreement dated November 1, 2007 among
         IndyMac Bank, F.S.B. as Servicer, Inc, IndyMac MBS, Inc. and Deutsche
         Bank National Trust Company, as Trustee and Supplemental Interest
         Trustee
         ----------------------------------------------------------------------

Ladies and Gentlemen:

         In connection with the administration of the Mortgage Loans held by you
as Trustee for IndyMac MBS, Inc., we request the release of the Mortgage Loan
File for the Mortgage Loan(s) described below, for the reason indicated.

         FT Account #:    Pool #:

Mortgagor's Name, Address and Zip Code:
---------------------------------------

Mortgage Loan Number:
---------------------

Reason for Requesting Documents (check one)
-------------------------------

_______1.        Mortgage Loan paid in full (IndyMac hereby certifies that
                 all amounts have been received.)

_______2.        Mortgage Loan Liquidated (IndyMac hereby certifies that all
                 proceeds of foreclosure, insurance, or other liquidation
                 have been finally received.)

_______3.        Mortgage Loan in Foreclosure.

_______4.        Other (explain): ____________________________________

         If item 1 or 2 above is checked, and if all or part of the Mortgage
File was previously released to us, please release to us our previous receipt on
file with you, as well as an additional documents in your possession relating to
the above-specified Mortgage Loan. If item 3 or 4 is checked, upon return of all
of the above documents to you as Trustee, please acknowledge your receipt by
signing in the space indicated below, and returning this form.

                                      N-1
<PAGE>

INDYMAC BANK, F.S.B.
888 East Walnut Street
Pasadena, CA  91101-7211

By:________________________
Name:______________________
Title:_____________________
Date:______________________

TRUSTEE CONSENT TO RELEASE AND
ACKNOWLEDGEMENT OF RECEIPT

By:________________________
Name:______________________
Title:_____________________
Date:______________________

                                      N-2
<PAGE>

                                   EXHIBIT O-1

      FORM OF CERTIFICATION TO BE PROVIDED BY THE DEPOSITOR WITH FORM 10-K

              Re:    IndyMac MBS, Inc.
                     IndyMac INDA Mortgage Loan Trust 200_-  , Series 200_- __
                     ---------------------------------------------------------

                  I, [identify the certifying individual], certify that:

                  1. I have reviewed this report on Form 10-K and all reports on
Form 10-D required to be filed in respect of the period covered by this report
on Form 10-K of IndyMac INDA Mortgage Loan Trust 200 - , Series 200 - (the
"Exchange Act periodic reports");

                  2. Based on my knowledge, the Exchange Act periodic reports,
taken as a whole, does not contain any untrue statement of a material fact or
omit to state a material fact necessary to make the statements made, in light of
the circumstances under which such statements were made, not misleading with
respect to the period covered by this report;

                  3. Based on my knowledge, the distribution, servicing and
other information required to be provided under Form 10-D for the period covered
by this report is included in the Exchange Act periodic reports;

                  4. Based on my knowledge and the servicer compliance statement
required in this report under Item 1123 of Regulation AB and except as disclosed
in the Exchange Act periodic reports, the servicer has fulfilled its obligations
under the servicing agreement in all material respects; and

                  5. All of the reports on assessment of compliance with
servicing criteria for asset-backed securities and their related attestation
reports on assessment of compliance with servicing criteria for asset-backed
securities required to be included in this report in accordance with Item 1122
of Regulation AB and Exchange Act Rules 13a-18 and 15d-18 have been included as
an exhibit to this report, except as otherwise disclosed in this report. Any
material instances of noncompliance described in such reports have been
disclosed in this report on Form 10-K.

                  In giving the certifications above, I have reasonably relied
on information provided to me by the following unaffiliated parties: Deutsche
Bank National Trust Company.

Date: __________________

                                   ____________________________________________
                                   [Signature]
                                   [Title]

                                     O-1-1
<PAGE>

                                   EXHIBIT O-2

                         TRUSTEE'S OFFICER'S CERTIFICATE

                  I, ____________________, a duly elected and acting officer of
Deutsche Bank National Trust Company (the "Trustee") hereby certify as follows:

                  Reference is hereby made to the Pooling and Servicing
Agreement dated as of November 1, 2007 (the "Pooling Agreement") by and among
IndyMac Bank, F.S.B., as seller and servicer, IndyMac MBS, Inc., as depositor
and Deutsche Bank National Trust Company, as trustee and supplemental interest
trustee, pursuant to which was created the IndyMac INDA Mortgage Loan Trust 200
- , Series 200 - (the "Trust"). Capitalized terms used herein but not defined
shall have the meanings assigned to them in the Pooling Agreement.

                  1. I am an authorized officer of the Trustee and I have
reviewed this annual report on Form 10-K and all reports on Form 10-D required
to be filed in respect of the period covered by this report on Form 10-K of
IndyMac INDA Mortgage Loan Trust 200 - , Series 200 - (the "Exchange Act
Periodic Reports");

                  2. For purposes of this certificate, "Relevant Information"
means the information in the report on assessment of the Trustee's compliance
with the servicing criteria set forth in Item 1122(d) of Reg AB (the "Servicing
Assessment"), the registered public accounting firm's attestation provided in
accordance with Rules 13a-18 and 15d-18 under the Exchange Act and Section
1122(b) of Reg AB ( the "Attestation Report") applicable to the Trustee and the
Monthly Statements (excluding information provided, or based on information
provided, by the Servicer or any servicer) and those items in Exhibit S attached
to the Pooling and Servicing Agreement which indicate the 4.03 statement or the
Trustee as the responsible party during the Relevant Year. Based on my
knowledge, the Relevant Information, taken as a whole, does not contain any
untrue statement of a material fact or omit to state a material fact necessary
to make the statements made, in light of the circumstances under which such
statements were made, not misleading with respect to the period covered by this
annual report; and

                  3. Based on my knowledge, the distribution information
required to be provided by the Trustee under the Pooling and Servicing Agreement
is included in the Monthly Statements.

                  4. I am responsible for reviewing the activities performed by
the Trustee, as servicer under the Pooling Agreement during the Relevant Year.
Based upon the review required by the Pooling Agreement and except as disclosed
in the Servicing Assessment or Attestation Report, to the best of my knowledge,
the Trustee has fulfilled its obligations under the Pooling Agreement throughout
the Relevant Year. Relevant Year shall mean 200__.

DATED as of _____________, 200____.

                                         By:      _____________________________
                                         Name:
                                   Title:

                                     O-2-1
<PAGE>

                                    EXHIBIT P

                           [On File with the Trustee]

                                      P-1
<PAGE>

                                    EXHIBIT Q
                                    ---------

                        FORM 10-D, FORM 8-K AND FORM 10-K
                            REPORTING RESPONSIBILITY

As to each item described below, the entity indicated as the Responsible Party
shall be primarily responsible for reporting the information to the Trustee
pursuant to Section 3.24(e). If the Trustee is indicated below as to any item,
then the Trustee is primarily responsible for obtaining that information.

Under Item 1 of Form 10-D: a) items marked "4.03 statement" are required to be
included in the periodic Distribution Date statement under Section 4.03,
provided by the Trustee based on information received from the Servicer; and b)
items marked "Form 10-D report" are required to be in the Form 10-D report but
not the 4.03 statement, provided by the party indicated. Information under all
other Items of Form 10-D is to be included in the Form 10-D report.

<TABLE>
<CAPTION>

    Form            Item                              Description                             Responsible Party
-------------- --------------- ---------------------------------------------------------- ---------------------------
<S>            <C>               <C>                                                       <C>
10-D           Must be filed within 15 days of the distribution date for the mortgage-backed securities.
               =========================================================================================
-------------- ------------------------------------------------------------------------------------------------------
               1               Distribution and Pool Performance Information
-------------- --------------- ---------------------------------------------------------- ---------------------------
                               Item 1121(a) - Distribution and Pool Performance
                               Information
-------------- --------------- ---------------------------------------------------------- ---------------------------
                               (1) Any applicable record dates, accrual dates,              4.03 statement
                               determination dates for calculating distributions
                               and actual distribution dates for the distribution
                               period.
-------------- --------------- ---------------------------------------------------------- ---------------------------
                               (2) Cash flows received and the sources thereof              4.03 statement
                               for distributions, fees and expenses.
-------------- --------------- ---------------------------------------------------------- ---------------------------
                               (3) Calculated amounts and distribution of the               4.03 statement
                               flow of funds for the period itemized by type and
                               priority of payment, including:
-------------- --------------- ---------------------------------------------------------- ---------------------------
                                        (i) Fees or expenses accrued and paid,              4.03 statement
                               with an identification of the general purpose of
                               such fees and the party receiving such fees or
                               expenses.
-------------- --------------- ---------------------------------------------------------- ---------------------------
                                        (ii) Payments accrued or paid with                  4.03 statement
                               respect to enhancement or other support identified
                               in Item 1114 of Regulation AB(such as insurance
                               premiums or other enhancement maintenance fees),
                               with an identification of the general purpose of
                               such payments and the party receiving such
                               payments.
-------------- --------------- ---------------------------------------------------------- ---------------------------
                                        (iii) Principal, interest and other                 4.03 statement
                               distributions accrued and paid on the
                               mortgage-backed securities by type and by class
                               or series and any principal or interest
                               shortfalls or carryovers.
-------------- --------------- ---------------------------------------------------------- ---------------------------
                                        (iv) The amount of excess cash flow or              4.03 statement
                               excess spread and the disposition of excess cash
                               flow.
-------------- --------------- ---------------------------------------------------------- ---------------------------
                               (4) Beginning and ending principal balances of               4.03 statement
                               the mortgage-backed securities.
-------------- --------------- ---------------------------------------------------------- ---------------------------
                               (5) Interest rates applicable to the pool assets             4.03 statement
                               and the mortgage-backed securities, as applicable.
-------------- --------------- ---------------------------------------------------------- ---------------------------
                               (6) Beginning and ending balances of transaction             4.03 statement
                               accounts, such as reserve accounts, and material

                                      Q-1

<PAGE>

                               account activity during the period.
-------------- --------------- ---------------------------------------------------------- ---------------------------
                               (7) Any amounts drawn on any credit enhancement              4.03 statement
                               or other support identified in Item 1114 of
                               Regulation AB, as applicable, and the amount of
                               coverage remaining under any such enhancement, if
                               known and applicable.
-------------- --------------- ---------------------------------------------------------- ---------------------------
                               (8) Number and amount of pool assets at the                  4.03 statement
                               beginning and ending of each Period, and such
                               as weighted average coupon, weight Updated pool              updated pool
                               composition information, average life, weighted              composition
                               average remaining term, pool factor and                      information fields to
                               prepayment amounts.                                          be as specified by
                                                                                            Depositor from time to
                                                                                            time
-------------- --------------- ---------------------------------------------------------- ---------------------------
                               (9) Delinquency and loss information for the period.         4.03 statement.

                               In addition, describe any material changes to the
                               information specified in Item 1100(b)(5) of Regulation       Form 10-D report:
                               AB regarding the pool assets.                                Servicer
-------------- --------------- ---------------------------------------------------------- ---------------------------
                               (10) Information ont he amount, terms and general            4.03 statement
                               purpose of any advaces made or reimbursed during
                               the period, including the general use of funds
                               advance and the general source of funds for
                               reimbursements.
-------------- --------------- ---------------------------------------------------------- ---------------------------
                               (11) Any material modifications, extensions or               10-D report:
                               waivers Form to pool asset terms, fees, penalties            Servicer
                               or payments during the distribution period or
                               that have cumulatively become material over time.
-------------- --------------- ---------------------------------------------------------- ---------------------------
                               (12) Material breaches of pool asset                         Form 10-D report:
                               representations or warranties or transaction                 Trustee (based on
                               covenants.                                                   actual knowledge to
                                                                                            the extent not notified
                                                                                            by the Servicer or the
                                                                                            Depositor)and
                                                                                            Depositor (to the
                                                                                            extent of actual
                                                                                            knowledge)
-------------- --------------- ---------------------------------------------------------- ---------------------------
                               (13) Information on ratio, coverage or other                 4.03 statement
                               tests used  for determining any early
                               amortization, liquidation or other performance
                               trigger and whether the trigger was met.
-------------- --------------- ---------------------------------------------------------- ---------------------------
                               (14) Information regarding any new issuance of               Form 10-D report:
                               mortgage-backed securities backed by the same                Depositor
                               asset pool,

                               [information regarding] any pool asset changes               Form 10-D report:
                               (other than in connection with a pool asset                  Servicer
                               converting into cash in accordance with
                               its terms), such as additions or removals in
                               connection with a pre-funding or revolving
                               period and pool asset

                                      Q-2

<PAGE>

                               substitutions and repurchases (and purchase rates,
                               if applicable), and cash flows available for
                               future purchases, such as the balances of any
                               pre-funding or revolving accounts, if applicable.

                               Disclose any material changes in the solicitation,
                               credit-granting, underwriting, origination,                  Form 10-D report:
                               acquisition or pool selection criteria or                    Servicer
                               procedures, as applicable, used to originate,
                               acquire or select the new pool assets.
-------------- --------------- ---------------------------------------------------------- ---------------------------
                               Item 1121(b) - Pre-Funding or Revolving Period               N/A
                               Information

                               Updated pool information as required under Item
                               1121(b).
-------------- --------------- ---------------------------------------------------------- ---------------------------
               2               Legal Proceedings
-------------- --------------- ---------------------------------------------------------- ---------------------------
                               Item 1117 - Legal proceedings pending against the
                               following entities, or their respective property,
                               that is material to Certificateholders, including
                               proceedings known to be contemplated by
                               governmental authorities:

                               Sponsor (Seller)
                                                                                            Seller
                               Depositor
                                                                                            Depositor
                               Trustee
                                                                                            Trustee
                               Issuing entity
                                                                                            Depositor
                               Servicer, affiliated Servicer, other Servicer
                               servicing 20% or more of pool assets at time of
                               report, other Servicer material servicers

                               Originator of 20% or more of pool assets as of the           Seller
                               Cut-off Date

                               Custodian                                                    Trustee
-------------- --------------- ---------------------------------------------------------- ---------------------------
               3               Sales of Securities and Use of Proceeds
-------------- --------------- ---------------------------------------------------------- ---------------------------
                               Information from Item 2(a) of Part II of Form 10-Q:

                               With respect to any sale of securities by the
                               sponsor, depositor or issuing entity, that are               Depositor
                               backed by the same asset pool or are otherwise
                               issued by the issuing entity, whether or not
                               registered, provide the sales and use of proceeds
                               information in Item 701 of Regulation S-K. Pricing
                               information can be omitted if securities were not
                               registered.
-------------- --------------- ---------------------------------------------------------- ---------------------------
               4               Defaults Upon Senior Securities
-------------- --------------- ---------------------------------------------------------- ---------------------------
                               Information from Item 3 of Part II of Form 10-Q:
-------------- --------------- ---------------------------------------------------------- ---------------------------

                                      Q-3

<PAGE>

-------------- --------------- ---------------------------------------------------------- ---------------------------
                               Report the occurrence of any Event of Default (after
                               expiration of any grace period and provision of any          Trustee
                               required notice)
-------------- --------------- --------------------------------------------------------- ----------------------------
               5               Submission of Matters to a Vote of Security
                               Holders
-------------- --------------- --------------------------------------------------------- ----------------------------
                               Information from Item 4 of Part II of Form 10-Q              Party submitting the
                                                                                            matter to Holders for
                                                                                            vote
-------------- --------------- --------------------------------------------------------- ----------------------------
               6               Significant Obligors of Pool Assets
-------------- --------------- --------------------------------------------------------- ----------------------------
                               Item 1112(b) - Significant Obligor Financial                 N/A
                               Information*
-------------- --------------- --------------------------------------------------------- ----------------------------
                               *This information need only be reported on the
                               Form 10-D for the distribution period in which
                               updated information is required pursuant to the
                               Item.
-------------- --------------- --------------------------------------------------------- ----------------------------
               7               Significant Enhancement Provider Information
-------------- --------------- --------------------------------------------------------- ----------------------------
                               Item 1114(b)(2) - Credit Enhancement Provider Financial      Depositor
                               Information*

                               Determining applicable disclosure threshold

                               Obtaining required financial information or effecting
                               incorporation by reference
-------------- --------------- --------------------------------------------------------- ----------------------------
                               Item 1115(b) - Derivative Counterparty Financial             Depositor
                               Information*

                               Determining current maximum probable exposure

                               Determining current significance percentage

                               Obtaining required financial information or effecting
                               incorporation by reference
-------------- --------------- --------------------------------------------------------- ----------------------------
                               *This information need only be reported on the
                               Form 10-D for the distribution period in which
                               updated information is required pursuant to the
                               Items.
-------------- --------------- --------------------------------------------------------- ----------------------------
               8               Other Information
-------------- --------------- --------------------------------------------------------- ----------------------------
                               Disclose any information required to be reported             The Responsible Party
                               on Form 8-K during the period covered by the Form            for the  applicable
                               10-D but not reported                                        Form 8-K item as
                                                                                            indicated below
-------------- --------------- --------------------------------------------------------- ----------------------------
               9               Exhibits
-------------- --------------- --------------------------------------------------------- ----------------------------
                               Distribution report                                          Trustee
-------------- --------------- --------------------------------------------------------- ----------------------------
                               Exhibits required by Item 601 of Regulation S-K, such        Depositor
                               as material agreements
-------------- ------------------------------------------------------------------------------------------------------
8-K            Must be filed within four business days of an event reportable on Form 8-K.
               ===========================================================================
-------------- --------------- --------------------------------------------------------- ----------------------------
               1.01            Entry into a Material Definitive Agreement
-------------- --------------- --------------------------------------------------------- ----------------------------

                                      Q-4

<PAGE>

-------------- --------------- --------------------------------------------------------- ----------------------------
                               Disclosure is required regarding entry into or               Servicer; or any of the
                               amendment of any definitive agreement that is                following that is a
                               material to the securitization, even if depositor            party to the agreement
                               is not a party.                                              if Servicer is not:
                                                                                            Trustee, Sponsor,
                               Examples: servicing agreement, custodial agreement.          Depositor

                               Note: disclosure not required as to definitive
                               agreements that are fully disclosed in the prospectus
-------------- --------------- --------------------------------------------------------- ----------------------------
               1.02            Termination of a Material Definitive Agreement
-------------- --------------- --------------------------------------------------------- ----------------------------
                               Disclosure is required regarding termination of              Servicer; or any of the
                               any definitive agreement that is material to the             following that is a
                               securitization (other than expiration in accordance          party to the agreement
                               with its terms), even if depositor is not a party.           if Servicer is not:
                                                                                            Trustee, Sponsor,
                               Examples: servicing agreement, custodial                     Depositor
                               agreement.
-------------- --------------- --------------------------------------------------------- ----------------------------
               1.03            Bankruptcy or Receivership
-------------- --------------- --------------------------------------------------------- ----------------------------
                               Disclosure is required regarding the bankruptcy
                               or Depositor receivership, if known to the
                               Depositor, with respect to any of the following:

                               Sponsor (Seller), Depositor, Servicer, affiliated
                               Servicer, other Servicer servicing 20% or more of
                               pool assets at time of report, other material
                               servicers, Trustee, significant obligor, credit
                               enhancer (10% or more), derivatives counterparty
-------------- --------------- --------------------------------------------------------- ----------------------------
               2.04            Triggering Events that Accelerate or Increase a Direct
                               Financial Obligation or an Obligation under an
                               Off-Balance Sheet Arrangement
-------------- --------------- --------------------------------------------------------- ----------------------------
                               Includes an early amortization, performance                  Servicer/Trustee (to
                               trigger or other event, including event of                   the extent of actual
                               default, that would materially alter the payment             knoowledge)
                               priority/distribution of cash flows/amortization
                               schedule.

                               Disclosure will be made of events other than
                               waterfall triggers which are disclosed in the
                               4.03 statement
-------------- --------------- --------------------------------------------------------- ----------------------------
               3.03            Material Modification to Rights of Security
                               Holders
-------------- --------------- --------------------------------------------------------- ----------------------------
                               Disclosure is required of any material                       Trustee
                               modification to documents defining the rights of
                               Certificateholders, including the Pooling and
                               Servicing Agreement
-------------- --------------- --------------------------------------------------------- ----------------------------
               5.03            Amendments to Articles of Incorporation or Bylaws;
                               Change in Fiscal Year
-------------- --------------- --------------------------------------------------------- ----------------------------
                               Disclosure is required of any amendment "to the              Depositor
                               governing documents of the issuing entity"
-------------- --------------- --------------------------------------------------------- ----------------------------

                                      Q-5

<PAGE>

-------------- --------------- --------------------------------------------------------- ----------------------------
               5.06            Change in Shell Company Status
-------------- --------------- --------------------------------------------------------- ----------------------------
                               [Not applicable to ABS issuers]                              Depositor
-------------- --------------- --------------------------------------------------------- ----------------------------
               6.01            ABS Informational and Computational Material
-------------- --------------- --------------------------------------------------------- ----------------------------
                               [Not included in reports to be filed under                   Depositor
                               Section 3.18
-------------- --------------- --------------------------------------------------------- ----------------------------
               6.02            Change of Servicer or Trustee
-------------- --------------- --------------------------------------------------------- ----------------------------
                               Requires disclosure of any removal, replacement,             Depositor or Trustee
                               substitution or addition of any servicer,
                               affiliated servicer, other servicer servicing 10%
                               or more of pool assets at time of report, other
                               material servicers, certificate administrator or
                               trustee. Reg AB disclosure about any new servicer
                               or trustee is also required.
-------------- --------------- --------------------------------------------------------- ----------------------------
               6.03            Change in Credit Enhancement or Other External
                               Support
-------------- --------------- --------------------------------------------------------- ----------------------------
                               Covers termination of any enhancement in manner              Depositor or Trustee
                               other than by its terms, the addition of an
                               enhancement, or a material change in the
                               enhancement provided. Applies to external credit
                               enhancements as well as derivatives. Reg AB
                               disclosure about any new enhancement provider is
                               also required.
-------------- --------------- --------------------------------------------------------- ----------------------------
               6.04            Failure to Make a Required Distribution                      Trustee
-------------- --------------- --------------------------------------------------------- ----------------------------
               6.05            Securities Act Updating Disclosure
-------------- --------------- --------------------------------------------------------- ----------------------------
                               If any material pool characteristic differs by 5%            Depositor
                               or  more at the time of issuance of the
                               securities from the description in the final
                               prospectus, provide updated Reg AB disclosure
                               about the actual asset pool.
-------------- --------------- --------------------------------------------------------- ----------------------------
-------------- --------------- --------------------------------------------------------- ----------------------------
                               If there are any new servicers or originators                Depositor
                               required to be disclosed under Regulation AB
                               as a result of the foregoing, provide the
                               information called for in Items 1108 and 1110
                               respectively.
-------------- --------------- --------------------------------------------------------- ----------------------------
               7.01            Regulation FD Disclosure                                     Depositor
-------------- --------------- --------------------------------------------------------- ----------------------------
               8.01            Other Events
--------------- --------------- --------------------------------------------------------- ----------------------------
                               Any event, with respect to which information is              Depositor
                               not otherwise called for in Form 8-K, that the
                               registrant deems of importance to security
                               holders.
-------------- --------------- --------------------------------------------------------- ----------------------------
-------------- --------------- --------------------------------------------------------- ----------------------------
               9.01            Financial Statements and Exhibits                            The Responsible Party
                                                                                            applicable to
                                                                                            reportable event
-------------- ------------------------------------------------------------------------------------------------------
10-K           Must be filed within 90 days of the fiscal year end for the registrant.
               =======================================================================
-------------- --------------- --------------------------------------------------------- ----------------------------
               9B              Other Information
-------------- --------------- --------------------------------------------------------- ----------------------------
-------------- --------------- --------------------------------------------------------- ----------------------------
                               Disclose any information required to be reported             The Responsible Party
                               on Form 8-K during the fourth quarter covered by             for the  applicable
                               the Form 10-K but not reported                               Form 8-K item as
                                                                                            indicated above
 -------------- --------------- --------------------------------------------------------- ----------------------------
               15              Exhibits and Financial Statement Schedules
-------------- --------------- --------------------------------------------------------- ----------------------------
                               Item 1112(b) - Significant Obligor Financial                 Servicer
                               Information
-------------- --------------- --------------------------------------------------------- ----------------------------

                                      Q-6

<PAGE>

-------------- --------------- --------------------------------------------------------- ----------------------------
                               Item 1114(b)(2) - Credit Enhancement Provider
                                Financial Information                                       Depositor

                               Determining applicable disclosure threshold

                               Obtaining required financial information or
                               effecting incorporation by reference
-------------- --------------- --------------------------------------------------------- ----------------------------
                               Item 1115(b) - Derivative Counterparty Financial             Depositor
                               Information

                               Determining current maximum probable exposure

                               Determining current significance percentage

                               Obtaining required financial information or
                               effecting incorporation by reference
-------------- --------------- --------------------------------------------------------- ----------------------------
                               Item 1117 - Legal proceedings pending against the
                               following entities, or their respective property,
                               that is material to Certificateholders, including
                               proceedings known to be contemplated by
                               governmental authorities:

                               Sponsor (Seller)                                             Seller

                               Depositor                                                    Depositor

                               Trustee                                                      Trustee

                               Issuing entity                                               Depositor

                               Servicer, affiliated Servicer, other Servicer                Servicer
                               servicing 20% or more of pool assets at time
                               of report, other material servicers

                               Originator of 20% or more of pool assets as of               Servicer
                               the Cut-off Date
-------------- --------------- --------------------------------------------------------- ----------------------------
                               Item 1119 - Affiliations and relationships between
                               the following entities, or their respective
                               affiliates, that are material to Certificateholders:

                               Sponsor (Seller)
                                                                                            Seller
                               Depositor
                                                                                            Depositor
                               Trustee
                                                                                            Trustee (only as to
                               Servicer, affiliated Servicer, other Servicer                affiliations between
                               servicing 20% or more of pool assets at time of              the Trustee and such
                               report, other material servicers                             other parties listed)

                               Originator                                                   Servicer
-------------- --------------- --------------------------------------------------------- ----------------------------

                                      Q-7

<PAGE>

-------------- --------------- --------------------------------------------------------- ----------------------------
                               Credit Enhancer/Support Provider

                               Significant Obligor                                          Depositor

                                                                                            Depositor

                                                                                            Servicer

-------------- --------------- --------------------------------------------------------- ----------------------------
                               Item 1122 - Assessment of Compliance with                    Each Party
                               Servicing Criteria                                           participating in the
                                                                                            servicing function
-------------- --------------- --------------------------------------------------------- ----------------------------
                               Item 1123 - Servicer Compliance Statement                    Servicer
-------------- --------------- --------------------------------------------------------- ----------------------------
</TABLE>

                                      Q-8
<PAGE>

                                    EXHIBIT R

                        FORM OF PERFORMANCE CERTIFICATION
                                    (Trustee)

          Re:       The Pooling and Servicing Agreement dated as of November 1,
                    2007 (the "Pooling and Servicing Agreement") among IndyMac
                    MBS, Inc., as Depositor, IndyMac Bank, F.S.B., as Seller and
                    Servicer, and the undersigned, as Trustee (the "Trustee")
                    and Supplemental Interest Trustee

         I, ________________________________, the _______________________ of the
Trustee (the "Trustee"), certify to the Depositor and the Servicer, and their
officers, with the knowledge and intent that they will rely upon this
certification, that:

                  (i) I have reviewed the report on assessment of the Trustee's
         compliance with the servicing criteria set forth in Item 1122(d) of
         Regulation AB (the "Servicing Criteria"), provided in accordance with
         Rules 13a-18 and 15d-18 under Securities Exchange Act of 1934, as
         amended (the "Exchange Act") and Item 1122 of Regulation AB (the
         "Servicing Assessment"), the registered public accounting firm's
         attestation report provided in accordance with Rules 13a-18 and 15d-18
         under the Exchange Act and Section 1122(b) of Regulation AB (the
         "Attestation Report"), all reports on Form 10-D containing statements
         to certificateholders filed in respect of the period included in the
         year covered by the annual report of the Trust Fund (collectively, the
         "Distribution Date Statements");

                  (ii) Assuming the accuracy and completeness of the information
         delivered to the Trustee by the Servicer as provided in the Pooling and
         Servicing Agreement and subject to paragraph (iv) below, to its
         knowledge the distribution information determined by the Trustee and
         set forth in the Distribution Date Statements contained in all Form
         10-D's included in the year covered by the annual report of such Trust
         on Form 10-K for the calendar year 200[ ], is complete and does not
         contain any material misstatement of fact as of the last day of the
         period covered by such annual report;

                  (iii) Based solely on the information delivered to the Trustee
         by the Servicer as provided in the Pooling and Servicing Agreement, the
         distribution information required under the Pooling and Servicing
         Agreement to be contained in the Trust Fund's Distribution Date
         Statements is included in such Distribution Date Statements;

                  (iv) The Trustee is not certifying as to the accuracy,
         completeness or correctness of the information which it received from
         the Servicer and did not independently verify or confirm the accuracy,
         completeness or correctness of the information provided by the
         Servicer;

                  (v) I am responsible for reviewing the activities performed by
         the Trustee as a person "performing a servicing function" under the
         Pooling and Servicing Agreement, and based on my knowledge and the
         compliance review conducted in preparing the Servicing Assessment and
         except as disclosed in the Servicing Assessment or the Attestation
         Report, the Trustee has fulfilled its obligations under the Pooling and
         Servicing Agreement; and

                  (vi) The Servicing Assessment and Attestation Report required
         to be provided by the Trustee and by Subcontractor, if any, pursuant to
         the Pooling and Servicing Agreement, have been provided to the Servicer
         and the Depositor. Any material instances of noncompliance

                                      R-1
<PAGE>

          described in such reports have been disclosed to the Servicer and the
          Depositor. Any material instance of noncompliance with the Servicing
          Criteria has been disclosed in such reports.

                                           Date:    _________________________

                                           By:  ________________________________
                                                  Name:
                                                  Title:

                                      R-2
<PAGE>

                                    EXHIBIT S

                  FORM OF SERVICING CRITERIA TO BE ADDRESSED IN
                       ASSESSMENT OF COMPLIANCE STATEMENT

Key:
X - obligation

Where there are multiple checks for criteria the attesting party will identify
in their management assertion that they are attesting only to the portion of the
distribution chain they are responsible for in the related transaction
agreements.

<TABLE>
<CAPTION>

  ----------------- ----------------------------------------- --------- ---------- ------------
  Reg AB Reference             Servicing Criteria             Servicer  Trustee      Notes
 <S>                 <C>                                     <C>       <C>         <C>
  ----------------- ----------------------------------------- --------- ---------- ------------
   1122(d)(1)(i)    Policies and procedures are instituted       X          X
                    to monitor any performance or other
                    triggers and events of default in
                    accordance with the transaction
                    agreements.
  ----------------- ----------------------------------------- --------- ---------- ------------
   1122(d)(1)(ii)   If any material servicing activities         X          X
                    are outsourced to third parties,
                    policies and procedures are instituted
                    to monitor the third party's
                    performance and compliance with such
                    servicing activities.
  ----------------- ----------------------------------------- --------- ---------- ------------
  1122(d)(1)(iii)   Any requirements in the transaction                                NA
                    agreements to maintain a back-up
                    servicer for the Pool Assets are
                    maintained.
  ----------------- ----------------------------------------- --------- ---------- ------------
   1122(d)(1)(iv)   A fidelity bond and errors and               X
                    omissions policy is in effect on the
                    party participating in the servicing
                    function throughout the reporting
                    period in the amount of coverage
                    required by and otherwise in accordance
                    with the terms of the transaction
                    agreements.
  ----------------- ----------------------------------------- --------- ---------- ------------

                                      S-1
<PAGE>

 ----------------- --------------------------------------- ----------- ----------- -----------
 Reg AB Reference            Servicing Criteria            Primary
                                                           Servicer     Trustee      Notes
 ----------------- --------------------------------------- ----------- ----------- -----------
  1122(d)(2)(i)    Payments on pool assets are deposited       X           X
                   into the appropriate custodial bank
                   accounts and related bank clearing
                   accounts no more than two business
                   days following receipt, or such other
                   number of days specified in the
                   transaction agreements.
 ----------------- --------------------------------------- ----------- ----------- -----------
  1122(d)(2)(ii)   Disbursements made via wire transfer        X           X
                   on behalf of an obligor or to an
                   investor are made only by authorized
                   personnel.
 ----------------- --------------------------------------- ----------- ----------- -----------
 1122(d)(2)(iii)   Advances of funds or guarantees             X
                   regarding collections, cash flows or
                   distributions, and any interest or
                   other fees charged for such advances,
                   are made, reviewed and approved as
                   specified in the transaction
                   agreements.
 ----------------- --------------------------------------- ----------- ----------- -----------
  1122(d)(2)(iv)   The related accounts for the                X           X
                   transaction, such as cash reserve
                   accounts or accounts established as a
                   form of over collateralization, are
                   separately maintained (e.g., with
                   respect to commingling of cash) as
                   set forth in the transaction
                   agreements.
 ----------------- --------------------------------------- ----------- ----------- -----------
  1122(d)(2)(v)    Each custodial account is maintained        X           X
                   at a federally insured depository
                   institution as set forth in the
                   transaction agreements. For purposes
                   of this criterion, "federally insured
                   depository institution" with respect
                   to a foreign financial institution
                   means a foreign financial institution
                   that meets the requirements of Rule
                   13k-1(b)(1) of the Securities
                   Exchange Act.
 ----------------- --------------------------------------- ----------- ----------- -----------
  1122(d)(2)(vi)   Unissued checks are safeguarded so as       X
                   to prevent unauthorized access.
 ----------------- --------------------------------------- ----------- ----------- -----------
 1122(d)(2)(vii)   Reconciliations are prepared on a           X           X
                   monthly basis for all asset-backed
                   securities related bank accounts,
                   including custodial accounts and
                   related bank clearing accounts. These
                   reconciliations are (A)
                   mathematically accurate; (B) prepared
                   within 30 calendar days after the
                   bank statement cutoff date, or such
                   other number of days specified in the
                   transaction agreements; (C) reviewed
                   and approved by someone other than
                   the person who prepared the
                   reconciliation; and (D) contain
                   explanations for reconciling items.
                   These reconciling items are resolved
                   within 90 calendar days of their
                   original identification, or such
                   other number of days specified in the
                   transaction agreements.
 ----------------- --------------------------------------- ----------- ----------- -----------

                                      S-2

<PAGE>
----------------- ---------------------------------------- ---------- ---------- -------------
Reg AB Reference            Servicing Criteria             Servicer    Trustee      Notes
----------------- ---------------------------------------- ---------- ---------- -------------

 1122(d)(3)(i)    Reports to investors, including those        X          X
                  to be filed with the Commission, are
                  maintained in accordance with the
                  transaction agreements and applicable
                  Commission requirements. Specifically,
                  such reports (A) are prepared in
                  accordance with timeframes and other
                  terms set forth in the transaction
                  agreements; (B) provide information
                  calculated in accordance with the
                  terms specified in the transaction
                  agreements; (C) are filed with the
                  Commission as required by its rules
                  and regulations; and (D) agree with
                  investors' or the trustee's records as
                  to the total unpaid principal balance
                  and number of Pool Assets serviced by
                  the Servicer.
----------------- ---------------------------------------- ---------- ---------- -------------
 1122(d)(3)(ii)   Amounts due to investors are allocated       X          X
                  and remitted in accordance with
                  timeframes, distribution priority and
                  other terms set forth in the
                  transaction agreements.
----------------- ---------------------------------------- ---------- ---------- -------------
1122(d)(3)(iii)   Disbursements made to an investor are        X          X
                  posted within two business days to the
                  Servicer's investor records, or such
                  other number of days specified in the
                  transaction agreements.
----------------- ---------------------------------------- ---------- ---------- -------------
 1122(d)(3)(iv)   Amounts remitted to investors per the        X          X
                  investor reports agree with cancelled
                  checks, or other form of payment, or
                  custodial bank statements.
----------------- ---------------------------------------- ---------- ---------- -------------

                                      S-3
<PAGE>

------------------ ----------------------------------------------- ------------- ----------- --------
Reg AB Reference                 Servicing Criteria                  Servicer     Trustee     Notes
------------------ ----------------------------------------------- ------------- ----------- --------
  1122(d)(4)(i)    Collateral or security on pool assets is             X            X
                   maintained as required by the transaction
                   agreements or related pool asset documents.
------------------ ----------------------------------------------- ------------- ----------- --------
 1122(d)(4)(ii)    Pool assets  and related documents are               X            X
                   safeguarded as required by the transaction
                   agreements.
------------------ ----------------------------------------------- ------------- ----------- --------
 1122(d)(4)(iii)   Any additions, removals or substitutions to          X            X
                   the asset pool are made, reviewed and
                   approved in accordance with any conditions or
                   requirements in the transaction agreements.
------------------ ----------------------------------------------- ------------- ----------- --------
 1122(d)(4)(iv)    Payments on pool assets, including any               X
                   payoffs, made in accordance with the related
                   pool asset documents are posted to the
                   Servicer's obligor records maintained no more
                   than two business days after receipt, or such
                   other number of days specified in the
                   transaction agreements, and allocated to
                   principal, interest or other items (e.g.,
                   escrow) in accordance with the related pool
                   asset documents.
------------------ ----------------------------------------------- ------------- ----------- --------
 1122(d)(4)(v)     The Servicer's records regarding the pool            X
                   assets agree with the Servicer's records
                   with respect to an obligor's unpaid
                   principal balance.
------------------ ----------------------------------------------- ------------- ----------- --------
 1122(d)(4)(vi)    Changes with respect to the terms or status of       X
                   an obligor's pool assets (e.g., loan
                   modifications or re-agings) are made, reviewed
                   and approved by authorized personnel in accordance
                   with the transaction agreements and related pool
                   asset documents.
------------------ ----------------------------------------------- ------------- ----------- --------
 1122(d)(4)(vii)   Loss mitigation or recovery actions (e.g.,           X
                   forbearance plans, modifications and deeds in
                   lieu of foreclosure, foreclosures and
                   repossessions, as applicable) are initiated,
                   conducted and concluded in accordance with
                   the timeframes or other requirements
                   established by the transaction agreements.
------------------ ----------------------------------------------- ------------- ----------- --------
1122(d)(4)(viii)   Records documenting collection efforts are           X
                   maintained during the period a pool asset is
                   delinquent in accordance with the transaction
                   agreements. Such records are maintained on at
                   least a monthly basis, or such other period
                   specified in the transaction agreements, and
                   describe the entity's activities in
                   monitoring delinquent pool assets including,
                   for example, phone calls, letters and payment
                   rescheduling plans in cases where delinquency
                   is deemed temporary (e.g., illness or
                   unemployment).
------------------ ----------------------------------------------- ------------- ----------- --------
 1122(d)(4)(ix)    Adjustments to interest rates or rates of            X
                   return for pool assets with variable rates are
                   computed based on the related pool asset
                   documents.
------------------ ----------------------------------------------- ------------- ----------- --------

------------------ ----------------------------------------------- ------------- ----------- --------
Reg AB                            Servicing Criteria                  Servicer     Trustee     Notes
------------------ ----------------------------------------------- ------------- ----------- --------

                                      S-4
<PAGE>

------------------ ----------------------------------------------- ------------- ----------- --------
Reference
------------------ ----------------------------------------------- ------------- ----------- --------
  1122(d)(4)(x)    Regarding any funds held in trust for an             X
                   obligor (such as escrow accounts): (A) such
                   funds are analyzed, in accordance with the
                   obligor's pool asset documents, on at least
                   an annual basis, or such other period
                   specified in the transaction agreements; (B)
                   interest on such funds is paid, or credited,
                   to obligors in accordance with applicable
                   pool asset documents and state laws; and (C)
                   such funds are returned to the obligor within
                   30 calendar days of full repayment of the
                   related pool assets, or such other number of
                   days specified in the transaction agreements.
------------------ ----------------------------------------------- ------------- ----------- --------
 1122(d)(4)(xi)    Payments made on behalf of an obligor (such          X
                   as tax or insurance payments) are made on or
                   before the related penalty or expiration
                   dates, as indicated on the appropriate bills
                   or notices for such payments, provided that
                   such support has been received by the
                   servicer at least 30 calendar days prior to
                   these dates, or such other number of days
                   specified in the transaction agreements.
------------------ ----------------------------------------------- ------------- ----------- --------
 1122(d)(4)(xii)   Any late payment penalties in connection             X
                   with any payment to be made on behalf of an
                   obligor are paid from the Servicer's funds and
                   not charged to the obligor, unless the late
                   payment was due to the obligor's error or omission.
------------------ ----------------------------------------------- ------------- ----------- --------
1122(d)(4)(xiii)   Disbursements made on behalf of an obligor           X
                   are posted within two business days to the
                   obligor's records maintained by the servicer,
                   or such other number of days specified in the
                   transaction agreements.
------------------ ----------------------------------------------- ------------- ----------- --------
 1122(d)(4)(xiv)   Delinquencies, charge-offs and uncollectible         X
                   accounts are recognized and recorded in
                   accordance with the transaction agreements.
------------------ ----------------------------------------------- ------------- ----------- --------
 1122(d)(4)(xv)    Any external enhancement or other support,           X (with       X
                   identified in Item 1114(a)(1) through (3)          Respect to a
                   or Item 1115 of Regulation AB, is maintained          swap
                   as set forth in the transaction agreements.         disclosure
                                                                         event)
------------------ ----------------------------------------------- ------------- ----------- --------
</TABLE>

                                      S-5
<PAGE>

                                    EXHIBIT T

                       [FORM OF] LIST OF ITEM 1119 PARTIES

                            ASSET BACKED CERTIFICATES
                                 Series 200_-__

                                     [Date]

------------------------------------ ----------------------------------------
Party                                Contact Information
------------------------------------ ----------------------------------------

------------------------------------ ----------------------------------------

------------------------------------ ----------------------------------------

------------------------------------ ----------------------------------------

------------------------------------ ----------------------------------------

------------------------------------ ----------------------------------------

------------------------------------ ----------------------------------------

                                      T-1
<PAGE>

                                    EXHIBIT U

                     [FORM OF] SARBANES-OXLEY CERTIFICATION
                             (Replacement Servicer)

         Re:      Indymac INDA Mortgage Loan Trust 2007-AR8
                  ------------------------------------------

         The undersigned Servicer hereby certifies to the Depositor and its
officers, directors and Affiliates (collectively, the "Certification Parties")
as follows, with the knowledge and intent that the Certification Parties will
rely on this Certification in connection with the certification concerning the
Trust Fund to be signed by an officer of the Depositor and submitted to the
Securities and Exchange Commission pursuant to the Sarbanes-Oxley Act of 2002:

         1. I have reviewed the servicer compliance statement of the Servicer
provided in accordance with Item 1123 of Regulation AB (the "Compliance
Statement"), the report on assessment of the Servicer's compliance with the
servicing criteria set forth in Item 1122(d) of Regulation AB (the "Servicing
Criteria"), provided in accordance with Rules 13a-18 and 15d-18 under Securities
Exchange Act of 1934, as amended (the "Exchange Act") and Item 1122 of
Regulation AB (the "Servicing Assessment"), the registered public accounting
firm's attestation report provided in accordance with Rules 13a-18 and 15d-18
under the Exchange Act and Section 1122(b) of Regulation AB (the "Attestation
Report"), and all servicing reports, officer's certificates and other
information relating to the servicing of the Mortgage Loans by the Servicer
during 200[ ] that were delivered by the Servicer to the Trustee pursuant to the
Agreement (collectively, the "Servicing Information");

         2. Based on my knowledge, the Servicing Information, taken as a whole,
does not contain any untrue statement of a material fact or omit to state a
material fact necessary to make the statements made, in the light of the
circumstances under which such statements were made, not misleading with respect
to the period of time covered by the Servicing Information;

         3. Based on my knowledge, all of the Servicing Information required to
be provided by the Servicer under the Agreement has been provided to the
Depositor or the Trustee, as applicable;

         4. I am responsible for reviewing the activities performed by the
Servicer as servicer under the Servicing Agreement (the "Pooling and Servicing
Agreement") relating to the above-referenced Series, among IndyMac MBS, Inc., as
Depositor, IndyMac Bank, F.S.B., as Seller and Servicer, and Deutsche Bank
National Trust Company, as Trustee and Supplemental Interest Trustee and based
on my knowledge and the compliance review conducted in preparing the Compliance
Statement and except as disclosed in the Compliance Statement, the Pooling and
Servicing Assessment or the Attestation Report, the Servicer has fulfilled its
obligations under the Agreement in all material respects; and

         5. The Compliance Statement required to be delivered by the Servicer
pursuant to the Pooling and Servicing Agreement, and the Servicing Assessment
and Attestation Report required to be provided by the Servicer and by any
Reporting Subcontractor pursuant to the Agreement, have been provided to the
Depositor. Any material instances of noncompliance described in such reports
have been disclosed to the Depositor. Any material instance of noncompliance
with the Servicing Criteria has been disclosed in such reports.

                                      U-1
<PAGE>

                                           [SERVICER]

                                            By:________________________________
                                               Name:
                                               Title:
                                            Date:  ____________________________

                                      U-2The Swap Confirmation.
<PAGE>

DATE:             November 29, 2007

TO:               Deutsche Bank National  Trust  Company,  not in its individual
                  or  corporate  capacity  but solely as  Supplemental  Interest
                  Trustee  on  behalf  of the  Supplemental  Interest  Trust  in
                  respect of IndyMac INDA Mortgage Loan Trust 2007-AR8
ATTENTION:        Jennifer Hermansader
TELEPHONE:        (714) 247-6258
FACSIMILE:        (714) 656-2626

FROM:             Deutsche Bank AG, New York Branch
ATTENTION:        New York Derivatives Documentation
TELEPHONE:        (212) 250-9425
FACSIMILE:        (212) 797-0779
E-MAIL:           NYderivative.documentation@db.com
SUBJECT:          Class A-1 Interest Rate Swap
REFERENCE NUMBER: N727633N

The purpose of this  long-form  confirmation  ("Long-form  Confirmation")  is to
confirm the terms and conditions of the current  Transaction entered into on the
Trade Date specified  below (the  "Transaction")  between  Deutsche Bank AG, New
York Branch  ("Party A") and Deutsche Bank National  Trust  Company,  not in its
individual or corporate capacity but solely as Supplemental  Interest Trustee on
behalf of the  Supplemental  Interest  Trust in respect of IndyMac INDA Mortgage
Loan  Trust  2007-AR8  ("Party  B")  created  under the  Pooling  and  Servicing
Agreement,  dated as of  November 1, 2007 among  Deutsche  Bank  National  Trust
Company (as "Trustee" and "Supplemental Interest Trustee"), IndyMac Bank, F.S.B,
and IndyMac MBS, Inc. (as "Depositor") (the "PSA"). This Long-form  Confirmation
evidences a complete and binding  agreement between you and us to enter into the
Transaction  on the terms set forth below and replaces  any  previous  agreement
between us with respect to the subject matter  hereof.  Item 2 of this Long-form
Confirmation  constitutes  a  "Confirmation"  as  referred to in the ISDA Master
Agreement (defined below); Item 3 of this Long-form  Confirmation  constitutes a
"Schedule"  as  referred  to in the ISDA  Master  Agreement;  and Annex A hereto
constitutes Paragraph 13 of a Credit Support Annex to the Schedule.

Item 1.  The  Confirmation  set  forth at Item 2 hereof shall supplement, form a
         part of, and be subject to an  agreement in the form of the ISDA Master
         Agreement  (Multicurrency  - Cross Border) as published and copyrighted
         in 1992 by the International  Swaps and Derivatives  Association,  Inc.
         (the "ISDA Master  Agreement"),  as if Party A and Party B had executed
         an agreement  in such form on the date  hereof,  with a Schedule as set
         forth  in Item 3 of this  Long-form  Confirmation,  and an ISDA  Credit
         Support Annex (Bilateral Form - ISDA Agreements Subject to New York Law
         Only version) as published and copyrighted in 1994 by the International
         Swaps and Derivatives  Association,  Inc., with Paragraph 13 thereof as
         set  forth in Annex A hereto  (the  "Credit  Support  Annex").  For the
         avoidance of doubt, the Transaction  described herein shall be the sole
         Transaction governed by such ISDA Master Agreement.

REFERENCE NUMBER: N727633N

Chairman of the Supervisory Board: Clemens Borsig
Management Board: Josef Ackermann (Chairman), Hugo Banziger, Tessen von
Heydebreck, Anthony Di Iorio, Hermann-Josef Lamberti

<PAGE>

Page 2 of 27

Item 2. The  terms of the  particular  Transaction  to which  this  Confirmation
relates are as follows:

<TABLE>
<CAPTION>
<S>                                                  <C>
         Type of Transaction:                        Interest Rate Swap

         Notional Amount:                            With  respect to any  Calculation  Period,  the Class
                                                     Certificate  Balance  of the Class  A-1  Certificates
                                                     immediately  prior to the related  Distribution  Date
                                                     which   occurs   in  the   calendar   month   of  the
                                                     Distribution   Date  for  such   Calculation   Period
                                                     (determined  for this purpose  without  regard to any
                                                     adjustment  of the  Floating  Rate  Payer  I  Payment
                                                     Date,   Floating   Rate  Payer  II  Payment  Date  or
                                                     Distribution Date relating to business days).

                                                     The  CUSIP no.  of the  Class  A-1  Certificates  is:
                                                     45671AAA8

                                                     The  Class  Certificate   Balance  of  the  Class  A-1
                                                     Certificates   shall  be   published  on  the  monthly
                                                     statement  to   certificateholders   on  the  internet
                                                     website  https://tss.sfs.db.com/investpublic.  If such
                                                     report  does  not  appear  on  the  internet   website
                                                     referenced above, the Class Certificate Balance of the
                                                     Class A-1  Certificates  can be obtained by contacting
                                                     the Supplemental Interest Trustee's customer relations
                                                     desk at (800) 735-7777.

         Trade Date:                                 November 15, 2007

         Effective Date:                             November 29, 2007

         Termination Date:                           January   25,   2038,   subject  to   adjustment   in
                                                     accordance   with  the   Business   Day   Convention;
                                                     provided,   however,   that   for  the   purpose   of
                                                     determining  the final  Floating Rate II Payer Period
                                                     End Date,  Termination  Date  shall be  subject to No
                                                     Adjustment.

         Floating Amounts :

                  Floating Rate I Payer:             Party A

                  Floating Rate I Payer
                  Period End Dates:                  The 25th calendar day of each month during the Term of
                                                     this  Transaction,  commencing  December 25, 2007, and
                                                     ending on the Termination Date,  subject to adjustment
                                                     in accordance with the Business Day Convention.

                  Floating Rate Payer I
                  Payment Dates:                     The 25th calendar day of each month during the Term of
                                                     this  Transaction,  commencing  December 25, 2007, and
                                                     ending on the Termination Date,  subject to adjustment
                                                     in accordance with the Business Day Convention.

                  Floating Rate I Option:            USD-LIBOR-BBA

                  Designated Maturity:               One Month

                  Floating Rate I Amount:            To be  determined  in  accordance  with the following
                                                     formula:

                                                     (Floating  Rate I Option + Floating  Rate I Spread) *
                                                     Notional Amount * Floating Rate Day I Count Fraction
</TABLE>

<PAGE>

Page 3 of 27

<TABLE>
<CAPTION>
<S>                                                  <C>
                  Floating Rate Spread:              Prior  to  the  first  date  on  which  an   Optional
                                                     Termination  is  permitted  to occur  under  the PSA,
                                                     0.45% and, thereafter 0.90%

                  Floating Rate I Day
                  Count Fraction:                    Actual/360

                  Reset Dates:                       The first day of each Calculation Period.

         Floating Amounts II:

                  Floating Rate II Payer:            Party B

                  Floating Rate II Payer
                  Period End Dates:                  The 1st  calendar day of each month during the Term of
                                                     this  Transaction,  commencing  December 1, 2007,  and
                                                     ending on the Termination Date, with No Adjustment.

                  Floating Rate II Payer
                  Payment Dates:                     The 25th calendar day of each month during the Term of
                                                     this  Transaction,  commencing  December 25, 2007, and
                                                     ending on the Termination Date,  subject to adjustment
                                                     in accordance with the Business Day Convention.

                  Floating Rate II:                  The  weighted   average  of  the   Weighted   Average
                                                     Adjusted  Net  Mortgage  Rate of the Group 1 Mortgage
                                                     Loans,  the  Weighted  Average  Adjusted Net Mortgage
                                                     Rate of the Group 2 Mortgage  Loans and the  Weighted
                                                     Average  Adjusted  Net  Mortgage  Rate of the Group 3
                                                     Mortgage Loans  (weighted  among the Group 1 Mortgage
                                                     Loans,  the  Group 2  Mortgage  Loans and the Group 3
                                                     Mortgage   Loans  on  the  basis  of  the  respective
                                                     Stated  Principal  Balances of the Mortgage  Loans in
                                                     each  such  loan  group  as of the  first  day of the
                                                     related   Due   Period   (after   giving   effect  to
                                                     principal  prepayments  received  in  the  Prepayment
                                                     Period ending  during that Due  Period)),  applied as
                                                     set forth under "Floating Rate II Amount" below.

                                                     Party B shall use commercially  reasonable  efforts to
                                                     provide to the Calculation  Agent the Weighted Average
                                                     Adjusted  Net  Mortgage  Rate of the Group 1  Mortgage
                                                     Loans, the Weighted Average Adjusted Net Mortgage Rate
                                                     of the Group 2 Mortgage Loans and the Weighted Average
                                                     Adjusted  Net  Mortgage  Rate of the Group 3  Mortgage
                                                     Loans at least 2 Business  Days prior to each Floating
                                                     Rate II Payer  Payment  Date and  shall,  in any case,
                                                     provide such  calculations  to the  Calculation  Agent
                                                     promptly    upon    receipt    thereof.    Party   B's
                                                     responsibility  for providing the above information is
                                                     limited to the  availability,  timeliness and accuracy
                                                     of information obtained from the Servicer.

                  Floating Rate II Amount:           To be  determined  in  accordance  with the following
                                                     formula:

                                                     the excess of

                                                     (i) the product of:

                                                              (a)  Floating Rate II Day Count Fraction
</TABLE>

<PAGE>

Page 4 of 27

<TABLE>
<CAPTION>
<S>                                                  <C>
                                                                               *

                                                              (b)  Floating Rate II

                                                                               *

                                                              (c)  Notional Amount

                                                                             over

                                                     (ii)  any Net  Interest  Shortfalls  allocated  to the
                                                     Class A-1  Certificates  under the PSA with respect to
                                                     the related Distribution Date

                  Floating Rate Day
                  Count Fraction:                    30/360

                  Compounding:                       Inapplicable

                  Business Days:                     New York

                  Business Day Convention:           Following
</TABLE>

<PAGE>

Page 5 of 27

Item  3.  Provisions  Deemed  Incorporated  in a  Schedule  to the  ISDA  Master
Agreement:

Part 1.  Termination Provisions.

For the purposes of this Agreement:-

(a)   "Specified Entity" will not apply to Party A or Party B for any purpose.

(b)   "Specified Transaction" will have the meaning specified in Section 14.

(c)   Events of Default.

      The  statement  below  that an Event of  Default  will apply to a specific
      party  means that upon the  occurrence  of such an Event of  Default  with
      respect  to such  party,  the  other  party  shall  have the  rights  of a
      Non-defaulting  Party under Section 6 of this Agreement;  conversely,  the
      statement  below that such event will not apply to a specific  party means
      that the other party shall not have such rights.

      (i)   The "Failure to Pay or Deliver"  provisions of Section  5(a)(i) will
            apply to Party A and will apply to Party B; provided,  however, that
            Section 5(a)(i) is hereby amended by replacing the word "third" with
            the word "first".

      (ii)  The "Breach of Agreement"  provisions of Section 5(a)(ii) will apply
            to Party A and will not apply to Party B.

      (iii) The "Credit Support  Default"  provisions of Section  5(a)(iii) will
            apply to Party A and will not apply to Party B except  that  Section
            5(a)(iii)(1)  will  apply to Party B solely in  respect of Party B's
            obligations under Paragraph 3(b).

      (iv)  The "Misrepresentation" provisions of Section 5(a)(iv) will apply to
            Party A and will not apply to Party B.

      (v)   The "Default  under  Specified  Transaction"  provisions  of Section
            5(a)(v) will apply to Party A and will not apply to Party B.

      (vi)  The "Cross  Default"  provisions  of Section  5(a)(vi) will apply to
            Party A and will not  apply to  Party B,  provided,  however,  that,
            notwithstanding  the foregoing,  an Event of Default shall not occur
            under either Section  5(a)(vi)(1) or Section  5(a)(vi)(2) if (A) (I)
            the default,  or other  similar  event or  condition  referred to in
            Section  5(a)(vi)(1)  or the  failure to pay  referred to in Section
            5(a)(vi)(2)  is a failure  to pay or  deliver  caused by an error or
            omission of an administrative or operational  nature, and (II) funds
            or the asset to be delivered  were available to such party to enable
            it to make the relevant  payment or delivery when due and (III) such
            payment or  delivery is made within  three (3) Local  Business  Days
            following receipt of written notice from an interested party of such
            failure to pay, or (B) such party was precluded from paying,  or was
            unable to pay,  using  reasonable  means,  through the office of the
            party  through  which it was acting  for  purposes  of the  relevant
            Specified  Indebtedness,  by reason of force majeure,  act of State,
            illegality  or  impossibility.  For  purposes  of Section  5(a)(vi),
            solely with respect to Party A:

      (vii) "Specified  Indebtedness" will have the meaning specified in Section
            14 ,except that such term shall not include  obligations  in respect
            of  deposits  received in the  ordinary  course of Party A's banking
            business.

            "Threshold  Amount" means with respect to Party A an amount equal to
            three  percent  (3%) of the  shareholders'  equity of Party A or, if
            applicable,  a  guarantor  under an Eligible  Guarantee  with credit
            ratings at least equal to the S&P Required Ratings Threshold and the
            Fitch First Trigger  Ratings  Threshold (as shown in the most recent
            annual  audited  financial  statements of such entity  determined in
            accordance with generally accepted accounting principles).

<PAGE>

Page 6 of 27

      (viii) The  "Bankruptcy"  provisions  of Section  5(a)(vii)  will apply to
            Party A and will  apply to Party B;  provided,  however,  that,  for
            purposes  of  applying  Section  5(a)(vii)  to Party B: (A)  Section
            5(a)(vii)(2)  shall not apply,  (B) Section  5(a)(vii)(3)  shall not
            apply to any assignment, arrangement or composition that is effected
            by or pursuant to the PSA, (C) Section  5(a)(vii)(4) shall not apply
            to a proceeding instituted,  or a petition presented,  by Party A or
            any  of  its  Affiliates  (for  purposes  of  Section  5(a)(vii)(4),
            Affiliate   shall  have  the   meaning  set  forth  in  Section  14,
            notwithstanding  anything to the  contrary in this  Agreement),  (D)
            Section  5(a)(vii)(6)  shall  not apply to any  appointment  that is
            effected  by or pursuant  to the PSA,  or any  appointment  to which
            Party B has not yet become subject;  (E) Section 5(a)(vii) (7) shall
            not apply; (F) Section  5(a)(vii)(8)  shall apply only to the extent
            of any  event  which has an effect  analogous  to any of the  events
            specified in clauses (1), (3), (4), (5) or (6) of Section 5(a)(vii),
            in each case as  modified  in this Part  1(c)(vii),  and (G) Section
            5(a)(vii)(9) shall not apply.

      (ix)  The "Merger  Without  Assumption"  provisions of Section  5(a)(viii)
            will apply to Party A and will not apply to Party B.

(d)   Termination Events.

      The  statement  below  that a  Termination  Event will apply to a specific
      party means that upon the occurrence of such a Termination  Event, if such
      specific  party is the  Affected  Party with  respect to a Tax Event,  the
      Burdened  Party with  respect to a Tax Event Upon Merger  (except as noted
      below) or the  non-Affected  Party  with  respect  to a Credit  Event Upon
      Merger,  as the case may be, such  specific  party shall have the right to
      designate an Early  Termination  Date in accordance with Section 6 of this
      Agreement;  conversely,  the  statement  below that such an event will not
      apply to a specific party means that such party shall not have such right;
      provided,  however,  with respect to "Illegality"  the statement that such
      event will apply to a specific  party  means that upon the  occurrence  of
      such a  Termination  Event with respect to such party,  either party shall
      have the right to designate an Early  Termination  Date in accordance with
      Section 6 of this Agreement.

      (i)   The "Illegality" provisions of Section 5(b)(i) will apply to Party A
            and will apply to Party B.

      (ii)  The "Tax Event" provisions of Section 5(b)(ii) will apply to Party A
            except that, for purposes of the application of Section  5(b)(ii) to
            Party A,  Section  5(b)(ii) is hereby  amended by deleting the words
            "(x) any action taken by a taxing  authority,  or brought in a court
            of  competent  jurisdiction,  on  or  after  the  date  on  which  a
            Transaction  is entered into  (regardless  of whether such action is
            taken or brought with respect to a party to this Agreement) or (y)",
            and the "Tax Event"  provisions  of Section  5(b)(ii)  will apply to
            Party B.

      (iii) The "Tax Event Upon Merger"  provisions  of Section  5(b)(iii)  will
            apply to Party A and will  apply to Party B,  provided  that Party A
            shall not be  entitled to  designate  an Early  Termination  Date by
            reason of a Tax Event  upon  Merger  in  respect  of which it is the
            Affected Party.

      (iv)  The "Credit Event Upon Merger"  provisions of Section  5(b)(iv) will
            not apply to Party A and will not apply to Party B.

(e)   The "Automatic Early Termination" provision of Section 6(a) will not apply
      to Party A and will not apply to Party B.

(f)   Payments on Early  Termination.  For the  purpose of Section  6(e) of this
      Agreement:

      (i)   Market   Quotation   will   apply,    provided,    however,    that,
            notwithstanding  anything to the contrary in this  Agreement,  if an
            Early  Termination  Date  has  been  designated  as  a  result  of a
            Derivative  Provider  Trigger Event,  the following  provisions will
            apply:

            (A)   The  definition  of Market  Quotation  in  Section 14 shall be
                  deleted in its entirety and replaced with the following:

<PAGE>

Page 7 of 27

                  "Market   Quotation"  means,  with  respect  to  one  or  more
                  Terminated Transactions,  a Firm Offer which is (1) made by an
                  Eligible Replacement,  (2) for an amount that would be paid to
                  Party  B  (expressed  as a  negative  number)  or by  Party  B
                  (expressed  as a  positive  number)  in  consideration  of  an
                  agreement  between  Party B and such Eligible  Replacement  to
                  enter  into a  Replacement  Transaction,  and (3)  made on the
                  basis  that  Unpaid  Amounts  in  respect  of  the  Terminated
                  Transaction or group of  Transactions  are to be excluded but,
                  without  limitation,  any payment or delivery that would,  but
                  for the relevant Early  Termination  Date,  have been required
                  (assuming satisfaction of each applicable condition precedent)
                  after that Early Termination Date is to be included.

            (B)   The  definition of  Settlement  Amount shall be deleted in its
                  entirety and replaced with the following:

                  "Settlement   Amount"   means,   with  respect  to  any  Early
                  Termination  Date, an amount (as  determined by Party B) equal
                  to:

                  (a)   if, on or prior to such Early Termination Date, a Market
                        Quotation  for the relevant  Terminated  Transaction  or
                        group of Terminated  Transactions is accepted by Party B
                        so  as  to  become  legally  binding,   the  Termination
                        Currency  Equivalent of the amount (whether  positive or
                        negative) of such Market Quotation;

                  (b)   if, on such Early  Termination Date, no Market Quotation
                        for the  relevant  Terminated  Transaction  or  group of
                        Terminated  Transactions has been accepted by Party B so
                        as to  become  legally  binding  and one or more  Market
                        Quotations   from   Approved   Replacements   have  been
                        communicated  to Party B and remain  capable of becoming
                        legally   binding  upon   acceptance  by  Party  B,  the
                        Termination  Currency  Equivalent of the amount (whether
                        positive  or  negative)  of the  lowest  of such  Market
                        Quotations  (for the  avoidance  of doubt,  (I) a Market
                        Quotation expressed as a negative number is lower than a
                        Market Quotation expressed as a positive number and (II)
                        the lower of two Market Quotations expressed as negative
                        numbers is the one with the largest absolute value); or

                  (c)   if, on such Early  Termination Date, no Market Quotation
                        for the  relevant  Terminated  Transaction  or  group of
                        Terminated  Transactions is accepted by Party B so as to
                        become legally  binding and no Market  Quotation from an
                        Approved  Replacement  has been  communicated to Party B
                        and remains  capable of becoming  legally  binding  upon
                        acceptance by Party B, Party B's Loss (whether  positive
                        or negative and without reference to any Unpaid Amounts)
                        for the  relevant  Terminated  Transaction  or  group of
                        Terminated Transactions."

            (C)   If  Party B  requests  Party A in  writing  to  obtain  Market
                  Quotations,  Party A shall use its reasonable efforts to do so
                  before the Early Termination Date.

            (D)   If  the  Settlement  Amount  is  a  negative  number,  Section
                  6(e)(i)(3)  shall be deleted in its entirety and replaced with
                  the following:

<PAGE>

Page 8 of 27

                  "(3) Second Method and Market Quotation.  If the Second Method
                  and Market  Quotation  apply, (I) Party B shall pay to Party A
                  an amount equal to the absolute value of the Settlement Amount
                  in respect of the Terminated Transactions,  (II) Party B shall
                  pay to  Party A the  Termination  Currency  Equivalent  of the
                  Unpaid Amounts owing to Party A and (III) Party A shall pay to
                  Party B the  Termination  Currency  Equivalent  of the  Unpaid
                  Amounts  owing  to Party B;  provided,  however,  that (x) the
                  amounts payable under the immediately  preceding  clauses (II)
                  and (III)  shall be  subject to  netting  in  accordance  with
                  Section 2(c) of this  Agreement  and (y)  notwithstanding  any
                  other provision of this Agreement, any amount payable by Party
                  A under the  immediately  preceding  clause (III) shall not be
                  netted  against  any  amount  payable  by  Party B  under  the
                  immediately preceding clause (I)."

            (E)   At any time on or before the Early  Termination  Date at which
                  two or more Market Quotations from Approved  Replacements have
                  been  communicated  to Party B and remain  capable of becoming
                  legally  binding upon  acceptance by Party B, Party B shall be
                  entitled to accept  only the lowest of such Market  Quotations
                  (for the avoidance of doubt, (I) a Market Quotation  expressed
                  as  a  negative  number  is  lower  than  a  Market  Quotation
                  expressed  as a  positive  number  and (II)  the  lower of two
                  Market  Quotations  expressed  as negative  numbers is the one
                  with the largest absolute value).

            (F)   Party B shall  determine  based on information  provided by an
                  entity that qualifies as a Reference  Market-maker  whether or
                  not a Firm Offer satisfies  clause (B)(y) of the definition of
                  Replacement Transaction and whether or not a proposed transfer
                  satisfies  clause  (e)(B)(y)  of the  definition  of Permitted
                  Transfer.

      (ii)  The Second Method will apply.

(g)   "Termination Currency" means USD.

(h)   Additional Termination Events. Additional Termination Events will apply as
      provided in Part 5(c).

<PAGE>

Page 9 of 27

Part 2.  Tax Matters.

(a)   Tax Representations.

      (i)   Payer  Representations.  For the  purpose  of  Section  3(e) of this
            Agreement:

            (A)   Party A makes the following representation(s):

                  It is not required by any  applicable  law, as modified by the
                  practice of any relevant  governmental  revenue authority,  of
                  any Relevant Jurisdiction to make any deduction or withholding
                  for or on  account  of any Tax from any  payment  (other  than
                  interest  under  Section  2(e),   6(d)(ii)  or  6(e)  of  this
                  Agreement)  to be made by it to the  other  party  under  this
                  Agreement. In making this representation,  it may rely on: the
                  accuracy  of  any  representations  made  by the  other  party
                  pursuant  to  Section  3(f)  of  this   Agreement;   (ii)  the
                  satisfaction of the agreement  contained in Section 4(a)(i) or
                  4(a)(iii) of this Agreement and the accuracy and effectiveness
                  of any  document  provided  by the  other  party  pursuant  to
                  Section 4(a)(i) or 4(a)(iii) of this Agreement;  and (iii) the
                  satisfaction  of the agreement of the other party contained in
                  Section 4(d) of this Agreement,  provided that it shall not be
                  a breach of this  representation  where  reliance is placed on
                  clause  (ii) and the other  party  does not  deliver a form or
                  document  under  Section   4(a)(iii)  by  reason  of  material
                  prejudice to its legal or commercial position.

            (B)   Party B makes the following representation(s):

                  None.

      (ii)  Payee  Representations.  For the  purpose  of  Section  3(f) of this
            Agreement:

            (A)   Party A makes the following representation(s):

                  It is a "foreign  person" within the meaning of the applicable
                  U.S. Treasury Regulations concerning information reporting and
                  backup  withholding  tax (as in effect on  January  1,  2001),
                  unless Party A provides  written  notice to Party B that it is
                  no longer a foreign  person.  In respect of any Transaction it
                  enters into  through an office or  discretionary  agent in the
                  United  States or which  otherwise  is  allocated  for  United
                  States federal income tax purposes to such United States trade
                  or  business,  each  payment  received or to be received by it
                  under such Transaction will be effectively  connected with its
                  conduct of a trade or business in the United States.

            (B)   Party B makes the following representation(s):

                  None.

(b)   Tax Provisions.

      (i)   Gross Up.  Section  2(d)(i)(4)  shall not apply to Party B as X, and
            Section  2(d)(ii) shall not apply to Party B as Y, in each case such
            that Party B shall not be  required  to pay any  additional  amounts
            referred to therein.

      (ii)  Indemnifiable Tax. The definition of "Indemnifiable  Tax" in Section
            14 is deleted in its entirety and replaced with the following:

            "Indemnifiable  Tax" means,  in relation to payments by Party A, any
            Tax and, in relation to payments by Party B, no Tax.

<PAGE>

Page 10 of 27

Part 3. Agreement to Deliver Documents.

(a)   For the purpose of Section 4(a)(i), tax forms,  documents, or certificates
      to be delivered are:

<TABLE>
<CAPTION>
Party required to     Form/Document/                                      Date by which to
deliver document      Certificate                                         be delivered
<S>                   <C>                                                 <C>
Party A               An  original  properly  completed  and  executed    (i) upon execution of this Agreement,  (ii) on
                      United  States  Internal  Revenue  Service  Form    or before  the first  payment  date under this
                      W-8ECI   or  other   applicable   form  (or  any    Agreement,   including   any  Credit   Support
                      successor  thereto)  together  with  appropriate    Document,  (iii)  promptly upon the reasonable
                      attachments,   with   respect  to  any  payments    demand   by  Party  B,   (iv)   prior  to  the
                      received  or to be  received  by  Party  A  that    expiration or  obsolescence  of any previously
                      eliminates U.S.  federal  withholding and backup    delivered  form,  and (v)  promptly  upon  the
                      withholding  Tax on  payments  to  Party A under    information on any such  previously  delivered
                      this Agreement.                                     form becoming inaccurate or incorrect.

Party B               (i)  Upon  execution  of  this   Agreement,   an    (i) upon execution of this Agreement,  (ii) on
                      original properly  completed and executed United    or before  the first  payment  date under this
                      States  Internal  Revenue  Service  Form W-9 (or    Agreement,   including   any  Credit   Support
                      any  successor  thereto)  with  respect  to  any    Document,   (iii)   in  the   case  of  a  tax
                      payments  received  or to  be  received  by  the    certification  form  other  than a  Form  W-9,
                      initial  beneficial owner of payments to Party B    before  December  31 of each third  succeeding
                      under this Agreement,  and (ii) thereafter,  the    calendar   year,   (iv)   promptly   upon  the
                      appropriate tax  certification  form (i.e.,  IRS    reasonable  demand  by Party  A, (v)  prior to
                      Form W-9 or IRS Form W-8BEN,  W-8IMY,  W-8EXP or    the   expiration   or   obsolescence   of  any
                      W-8ECI,  as applicable  (or any  successor  form    previously  delivered  form, and (vi) promptly
                      thereto)) with respect to any payments  received    upon  obtaining   actual  knowledge  that  the
                      or to be  received  by the  beneficial  owner of    information on any such  previously  delivered
                      payments  to Party B under this  Agreement  from    form becoming inaccurate or incorrect.
                      time to time.
</TABLE>

<PAGE>

page 11 of 27

(b)   For the purpose of Section 4(a)(ii), other documents to be delivered are:

<TABLE>
<CAPTION>
Party required to      Form/Document/                                     Date by which to                     Covered by
deliver document       Certificate                                        be delivered                         Section 3(d)
                                                                                                               Representation
<S>                    <C>                                                <C>                                  <C>
Party A and            Any documents required by the receiving party      Upon the execution and delivery      Yes
Party B                to  evidence  the  authority  of the delivering    of this Agreement
                       party or its Credit Support  Provider,  if any,
                       for it to execute and  deliver  the  Agreement,
                       each  Confirmation,   and  any  Credit  Support
                       Documents  to  which  it  is a  party,  and  to
                       evidence the authority of the delivering  party
                       or its Credit  Support  Provider to perform its
                       obligations    under   the   Agreement,    each
                       Confirmation  and any Credit Support  Document,
                       as the case may be

Party A and            A certificate of an authorized  officer of the     Upon the  execution  and delivery    Yes
Party B                party,  as to the  incumbency and authority of     of this Agreement
                       the  respective  officers of the party signing
                       the  Agreement,  each  Confirmation,  and  any
                       relevant Credit Support Document,  as the case
                       may be

Party A                Annual    Report   of   Party   A   containing     Promptly upon  becoming  publicly    Yes
                       consolidated  financial  statements  certified     available
                       by independent  certified  public  accountants
                       and  prepared  in  accordance  with  generally
                       accepted accounting  principles in the country
                       in which Party A is organized

Party A                Quarterly  Financial  Statements  of  Party  A     Promptly upon  becoming  publicly    Yes
                       containing unaudited,  consolidated  financial     available
                       statements   of  Party  A's   fiscal   quarter
                       prepared   in   accordance    with   generally
                       accepted accounting  principles in the country
                       in which Party A is organized

Party A                An opinion  of  counsel to Party A  reasonably     Upon the  execution  and delivery    No
                       acceptable to Party B.                             of this Agreement

Party B                An  executed  copy of the  PSA  and the  other     Within 30 days  after the date of    No
                       material  deal   documents   related  to  this     this Agreement
                       Transaction.
</TABLE>

Part 4.  Miscellaneous.

(a)   Address for Notices: For the purposes of Section 12(a) of this Agreement:

      Address for notices or communications to Party A:

      Any  notice  to Party A  relating  to a  particular  Transaction  shall be
      delivered to the address or facsimile number specified in the Confirmation
      of such Transaction. Any notice delivered for purposes of Sections 5 and 6
      (other than notices under Section 5(a)(i) with respect to Party A) of this
      Agreement shall be delivered to the following address:

      Address:          Deutsche Bank AG, Head Office
                        Taunusanlage 12
                        60262 Frankfurt
                        GERMANY
      Attention:        Legal Department

<PAGE>

Page 12 of 27

      Facsimile:        0049 69 910 36097

      (For all purposes)

      Address for notices or communications to Party B:

      Address:          Deutsche Bank National Trust Company
                        1761 East St. Andrew Place
                        Santa Ana, CA 92705
      Attention:        Trust Administration - IN07D8
      Facsimile:        (714) 656-2626
      Phone:            (714) 247-6258

      (For all purposes)

(b)   Process Agent. For the purpose of Section 13(c):

      Party A appoints as its Process Agent: Not applicable

      Party B appoints as its Process Agent:  Not applicable.

(c)   Offices.  The  provisions of Section  10(a) will apply to this  Agreement;
      neither Party A nor Party B has any Offices other than as set forth in the
      Notices  Section and Party A agrees that,  for purposes of Section 6(b) of
      this Agreement,  it shall not in the future have any Office other than one
      in the United States.

(d)   Multibranch Party. For the purpose of Section 10(c) of this Agreement:

      Party A is not a Multibranch Party.

      Party B is not a Multibranch Party.

(e)   Calculation  Agent. The Calculation  Agent is Party A; provided,  however,
      that if an Event of Default  shall have  occurred and is  continuing  with
      respect to Party A, Party B shall have the right to appoint as Calculation
      Agent  a  financial   institution  which  would  qualify  as  a  Reference
      Market-maker,  reasonably  acceptable to Party A, the cost for which shall
      be borne by Party A.

(f)   Credit Support Document.

      Party A:          The Credit Support Annex, and any guarantee in support
                        of Party A's obligations under this Agreement.

      Party B:          The Credit Support Annex, solely in respect of Party B's
                        obligations under Paragraph 3(b) of the Credit Support
                        Annex.

(g)   Credit Support Provider.

         Party A:       The  guarantor  under any  guarantee in support of Party
                        A's obligations under this Agreement.

         Party B:       None.

(h)   Governing Law. The parties to this Agreement  hereby agree that the law of
      the  State of New York  shall  govern  their  rights  and  duties in whole
      (including  any claim or  controversy  arising  out of or relating to this
      Agreement), without regard to the conflict of law provisions thereof other
      than New York General Obligations Law Sections 5-1401 and 5-1402.

(i)   Netting of Payments.  Subparagraph (ii) of Section 2(c) will apply to each
      Transaction hereunder.

<PAGE>

Page 13 of 27

(j)   Affiliate.  "Affiliate" shall have the meaning assigned thereto in Section
      14; provided,  however, that Party B shall be deemed to have no Affiliates
      for  purposes  of  this  Agreement,  including  for  purposes  of  Section
      6(b)(ii).

<PAGE>

Page 14 of 27

Part 5. Other Provisions.

(a)   Definitions.  Unless otherwise specified in a Confirmation, this Agreement
      and each  Transaction  under this  Agreement  are subject to the 2000 ISDA
      Definitions  as published  and  copyrighted  in 2000 by the  International
      Swaps and Derivatives Association,  Inc. (the "Definitions"),  and will be
      governed  in all  relevant  respects  by the  provisions  set forth in the
      Definitions, without regard to any amendment to the Definitions subsequent
      to  the  date  hereof.  The  provisions  of  the  Definitions  are  hereby
      incorporated by reference in and shall be deemed a part of this Agreement,
      except that (i)  references  in the  Definitions  to a "Swap  Transaction"
      shall  be  deemed  references  to a  "Transaction"  for  purposes  of this
      Agreement,  and (ii) references to a "Transaction" in this Agreement shall
      be  deemed  references  to  a  "Swap  Transaction"  for  purposes  of  the
      Definitions. Each term capitalized but not defined in this Agreement shall
      have the meaning assigned thereto in the PSA.

      Each reference herein to a "Section" (unless specifically  referencing the
      PSA)  or to a  "Section"  "of  this  Agreement"  will  be  construed  as a
      reference to a Section of the ISDA Master Agreement; each herein reference
      to a "Part" will be  construed  as a reference to the Schedule to the ISDA
      Master Agreement; each reference herein to a "Paragraph" will be construed
      as a reference to a Paragraph of the Credit Support Annex.

(b)   Amendments to ISDA Master Agreement.

      (i)   Single  Agreement.  Section 1(c) is hereby amended by the adding the
            words  "including,  for the avoidance of doubt,  the Credit  Support
            Annex" after the words "Master Agreement".

      (ii)  Conditions Precedent.  Section 2(a)(iii) is hereby amended by adding
            the following at the end thereof:

            Notwithstanding anything to the contrary in Section 2(a)(iii)(1), if
            an Event of Default with  respect to Party B or  Potential  Event of
            Default with respect to Party B has occurred and been continuing for
            more than 30 Local  Business Days and no Early  Termination  Date in
            respect  of  the   Affected   Transactions   has  occurred  or  been
            effectively  designated by Party A, the obligations of Party A under
            Section 2(a)(i) shall cease to be subject to the condition precedent
            set forth in Section  2(a)(iii)(1)  with  respect  to such  specific
            occurrence  of such  Event of  Default  or such  Potential  Event of
            Default (the "Specific Event"); provided, however, for the avoidance
            of doubt,  the obligations of Party A under Section 2(a)(i) shall be
            subject to the condition precedent set forth in Section 2(a)(iii)(1)
            (subject to the foregoing) with respect to any subsequent occurrence
            of the same Event of Default  with  respect to Party B or  Potential
            Event of Default with  respect to Party B after the  Specific  Event
            has ceased to be  continuing  and with respect to any  occurrence of
            any other  Event of Default  with  respect  to Party B or  Potential
            Event of Default with respect to Party B that occurs  subsequent  to
            the Specific Event.

      (iii) Change of Account. Section 2(b) is hereby amended by the addition of
            the following  after the word  "delivery" in the first line thereof:
            "to another  account in the same legal and tax  jurisdiction  as the
            original account".

      (iv)  Representations.  Section 3 is hereby  amended  by adding at the end
            thereof the following subsection (g):

            "(g)  Relationship Between Parties.

                  (1)   Nonreliance.  (i)  Deutsche  Bank AG,  New York  Bank is
                        acting for its own account and with  respect to Party B,
                        Deutsche Bank National  Trust  Company,  is executing as
                        Supplemental   Interest   Trustee   on   behalf  of  the
                        Supplemental  Interest  Trust in respect of IndyMac INDA
                        Mortgage Loan Trust 2007-AR8,  (ii) It is not relying on
                        any  statement  or  representation  of the  other  party
                        (whether  written  or oral)  regarding  any  Transaction
                        hereunder, other than the representations expressly made
                        in this Agreement or the Confirmation in respect of that
                        Transaction  and  (iii)  it has  consulted  with its own
                        legal, regulatory, tax, business,

<PAGE>

Page 15 of 27

                        investment,  financial  and  accounting  advisors to the
                        extent it has deemed necessary,  and it has made its own
                        investment, hedging and trading decisions based upon its
                        own judgment  and upon any advice from such  advisors as
                        it has deemed  necessary and not upon any view expressed
                        by the other party.

                  (2)   Evaluation and Understanding. (i) It has the capacity to
                        evaluate (internally or through independent professional
                        advice) each  Transaction  and has made its own decision
                        to enter into the  Transaction  and (ii) it  understands
                        the terms,  conditions and risks of the  Transaction and
                        is willing and able to accept those terms and conditions
                        and to assume those risks, financially and otherwise.

                  (3)   Purpose.  It is entering  into the  Transaction  for the
                        purposes  of managing  its  borrowings  or  investments,
                        hedging  its  underlying  assets  or  liabilities  or in
                        connection with a line of business.

                  (4)   Status of  Parties.  The other party is not acting as an
                        agent,  fiduciary  or  advisor  for it in respect of the
                        Transaction.

                  (5)   Eligible Contract  Participant.  It is an "eligible swap
                        participant"   as  such  term  is  defined  in,  Section
                        35.1(b)(2) of the regulations (17 C.F.R. 35) promulgated
                        under, and an "eligible contract participant" as defined
                        in Section  1(a)(12) of the  Commodity  Exchange Act, as
                        amended."

      (v)   Transfer  to Avoid  Termination  Event.  Section  6(b)(ii) is hereby
            amended  (i) by  deleting  the words "or if a Tax Event Upon  Merger
            occurs and the Burdened Party is the Affected  Party," and the words
            ", which consent will not be withheld if such other party's policies
            in effect at such time would  permit it to enter  into  transactions
            with the transferee on the terms  proposed" and (ii) by deleting the
            words "to  transfer"  and inserting the words "to effect a Permitted
            Transfer" in lieu thereof.

      (vi)  Jurisdiction.  Section  13(b) is hereby  amended by: (i) deleting in
            the second line of  subparagraph  (i) thereof the word "non-",  (ii)
            deleting "; and" from the end of subparagraph  (i) and inserting "."
            in lieu thereof, and (iii) deleting the final paragraph thereof.

(c)   Additional Termination Events. The following Additional Termination Events
      will apply:

      (i)   Failure to Post Collateral.  If Party A has failed to comply with or
            perform any  obligation  to be complied with or performed by Party A
            in accordance with the Credit Support Annex and such failure has not
            given rise to an Event of Default under  Section  5(a)(i) or Section
            5(a)(iii),  then an Additional Termination Event shall have occurred
            with respect to Party A and Party A shall be the sole Affected Party
            with respect to such Additional Termination Event.

      (ii)  Second  Rating  Trigger  Replacement.  The  occurrence  of any event
            described  in this Part  5(c)(ii)  shall  constitute  an  Additional
            Termination  Event with  respect to Party A and Party A shall be the
            sole  Affected  Party with  respect to such  Additional  Termination
            Event.

            (A)   [Reserved]

            (B)   An S&P Required  Ratings  Downgrade  Event has occurred and is
                  continuing  and at least 60 calendar  days have elapsed  since
                  such S&P Required Ratings Downgrade Event first occurred.

            (C)   A Fitch  Second  Trigger  Downgrade  Event has occurred and is
                  continuing  and at least 30 calendar  days have elapsed  since
                  such Fitch Second Trigger Downgrade Event first occurred.

      (iii) Amendment of PSA. If,  without the prior written  consent of Party A
            where such consent is required under the PSA (such consent not to be
            unreasonably withheld, conditioned or delayed), an

<PAGE>

Page 16 of 27

            amendment is made to the PSA which  amendment  could  reasonably  be
            expected to have a material adverse effect on the interests of Party
            A(excluding,  for the  avoidance of doubt,  any amendment to the PSA
            that  is  entered  into  solely  for the  purpose  of  appointing  a
            successor  servicer,  trustee or other service  provider) under this
            Agreement,  an Additional Termination Event shall have occurred with
            respect to Party B and Party B shall be the sole Affected Party with
            respect to such Additional Termination Event

      (iv)  Reserved.

      (v)   Optional  Termination of Securitization.  An Additional  Termination
            Event  shall  occur  upon the  notice  to  Certificateholders  of an
            optional  purchase of the Mortgage  Loans and REO  Properties by the
            Servicer  pursuant  to  Section  9.01(a)  of the PSA  (an  "Optional
            Termination") becoming unrescindable in accordance with Article 9 of
            the PSA (such  notice,  the  "Optional  Termination  Notice").  With
            respect to such Additional  Termination  Event: (A) Party B shall be
            the  sole  Affected  Party;  (B)  notwithstanding  anything  to  the
            contrary  in  Section  6(b)(iv)  or  Section   6(c)(i),   the  final
            Distribution  Date specified in the Optional  Termination  Notice is
            hereby  designated as the Early Termination Date for this Additional
            Termination  Event in  respect  of all  Affected  Transactions;  (C)
            Section  2(a)(iii)(2)  shall  not  be  applicable  to  any  Affected
            Transaction in connection with the Early  Termination Date resulting
            from this Additional Termination Event;  notwithstanding anything to
            the  contrary in Section  6(c)(ii),  payments and  deliveries  under
            Section  2(a)(i)  or  Section  2(e)  in  respect  of the  Terminated
            Transactions  resulting from this Additional  Termination Event will
            be required to be made through and including  the Early  Termination
            Date  designated as a result of this Additional  Termination  Event;
            provided,  for the  avoidance  of doubt,  that any such  payments or
            deliveries that are made on or prior to such Early  Termination Date
            will not be treated  as Unpaid  Amounts  in  determining  the amount
            payable   in   respect  of  such   Early   Termination   Date;   (D)
            notwithstanding anything to the contrary in Section 6(d)(i), (I) if,
            no later  than  4:00 pm New York  City  time on the day that is four
            Business Days prior to the final  Distribution Date specified in the
            Optional Termination Notice, the Servicer requests the amount of the
            Estimated  Swap  Termination  Payment,  Party A shall provide to the
            Servicer  in writing  (which may be done in  electronic  format) the
            amount of the Estimated Swap Termination  Payment no later than 2:00
            pm New York City time on the following  Business Day and (II) if the
            Servicer  provides  written  notice (which may be done in electronic
            format)  to Party A no later  than two  Business  Days  prior to the
            final Distribution Date specified in the Optional Termination Notice
            that all  requirements  of the Optional  Termination  have been met,
            then  Party A shall,  no later  than one  Business  Day prior to the
            final  Distribution  Date  specified  in  the  Optional  Termination
            Notice,  make the  calculations  contemplated  by  Section  6(e) (as
            amended herein) and provide to the Servicer in writing (which may be
            done in electronic  format) the amount  payable by either Party B or
            Party  A in  respect  of  the  related  Early  Termination  Date  in
            connection  with  this  Additional   Termination  Event;   provided,
            however,  that the amount  payable by Party B, if any, in respect of
            the related  Early  Termination  Date shall be the lesser of (x) the
            amount  calculated  to be due from Party B pursuant to Section  6(e)
            and  (y)  the   Estimated   Swap   Termination   Payment;   and  (E)
            notwithstanding  anything  to the  contrary in this  Agreement,  any
            amount due from  Party B to Party A in  respect  of this  Additional
            Termination  Event will be payable  on the final  Distribution  Date
            specified in the Optional Termination Notice and any amount due from
            Party A to Party B in respect of this Additional  Termination  Event
            will be payable  one  Business  Day prior to the final  Distribution
            Date  specified in the  Optional  Termination  Notice.  The Servicer
            shall be an express third party  beneficiary of this Agreement as if
            a party  hereto to the  extent of the  Servicer's  rights  specified
            herein.

(d)   Required Ratings  Downgrade  Event. If a Required Ratings  Downgrade Event
      has occurred and is  continuing,  then Party A shall,  at its own expense,
      use commercially reasonable efforts to, as soon as reasonably practicable,
      either  (A)  effect  a  Permitted  Transfer  or (B)  procure  an  Eligible
      Guarantee  by a guarantor  with  credit  ratings at least equal to the S&P
      Required Ratings Threshold and the Fitch First Trigger Ratings Threshold.

(e)   Party  A and  Party B  hereby  agree  that  the  terms  of the  Item  1115
      Agreement,  dated as of May 30,  2006 (the "Item 1115  Agreement"),  among
      Party A, IndyMac Bank,  F.S.B.,  IndyMac MBS,  Inc., and IndyMac ABS,

<PAGE>

Page 17 of 27

      Inc.  shall be  incorporated  by reference into this Agreement and Party B
      shall be an express third party beneficiary of the Item 1115 Agreement.  A
      copy of the Item 1115 Agreement is annexed hereto at Annex B.

(f)   Transfers.

      (i)   Section 7 is hereby amended to read in its entirety as follows:

            "Neither  this  Agreement nor any interest or obligation in or under
            this  Agreement  may be  transferred  (whether by way of security or
            otherwise) by either party unless (a) the prior  written  consent of
            the other party is obtained and (b) the Rating Agency  Condition has
            been satisfied with respect to S&P and Fitch, except that:

            (a)   Party A may make a Permitted  Transfer (1) pursuant to Section
                  6(b)(ii) (2) pursuant to a consolidation or amalgamation with,
                  or merger with or into,  or  transfer of all or  substantially
                  all its assets to,  another  entity (but without  prejudice to
                  any other right or remedy under this Agreement), or (3) at any
                  time at which no Relevant  Entity has credit  ratings at least
                  equal to the Approved Ratings Threshold;

            (b)   Party B may transfer its rights and obligations hereunder:

                  (1)   in connection  with a transfer  pursuant to Section 8.09
                        of the PSA.

            (c)   a party  may make  such a  transfer  of all or any part of its
                  interest in any amount  payable to it from a Defaulting  Party
                  under Section 6(e).

            Any purported  transfer that is not in compliance  with this Section
            will be void."

      (ii)  If an Eligible  Replacement  has made a Firm Offer (which remains an
            offer that will become legally  binding upon  acceptance by Party B)
            to be the  transferee  pursuant  to a  Permitted  Transfer,  Party B
            shall,  at Party  A's  written  request  and at Party  A's  expense,
            execute such documentation  provided to it as reasonably  determined
            necessary by Party A to effect such transfer.

(g)   Non-Recourse.  Party A acknowledges and agrees that,  notwithstanding  any
      provision in this  Agreement to the contrary,  the  obligations of Party B
      hereunder are limited recourse obligations of Party B, payable solely from
      the trust fund  created  pursuant  to the PSA (the  "Trust  Fund") and the
      proceeds  thereof,  in accordance  with the priority of payments and other
      terms of the PSA and that Party A will not have any recourse to any of the
      directors, officers, agents, employees,  shareholders or affiliates of the
      Party  B  with  respect  to  any  claims,  losses,  damages,  liabilities,
      indemnities  or other  obligations  in  connection  with any  transactions
      contemplated  hereby.  In the event that the Trust  Fund and the  proceeds
      thereof  should be  insufficient  to satisfy  all claims  outstanding  and
      following the  realization  thereof in accordance with the PSA, any claims
      against or obligations  of Party B under the ISDA Master  Agreement or any
      other confirmation  thereunder still outstanding shall be extinguished and
      thereafter not revive.  The  Supplemental  Interest Trustee shall not have
      liability for any failure or delay in making a payment  hereunder to Party
      A due to any failure or delay in  receiving  amounts  forming  part of the
      Trust Fund. This provision will survive the termination of this Agreement.

(h)   Timing of  Payments  by Party B upon  Early  Termination.  Notwithstanding
      anything to the contrary in Section 6(d)(ii),  to the extent that all or a
      portion  (in either  case,  the  "Unfunded  Amount") of any amount that is
      calculated  as being due in  respect of any Early  Termination  Date under
      Section  6(e) from Party B to Party A will be paid by Party B from amounts
      other than any upfront payment paid to Party B by an Eligible  Replacement
      that has entered into a  Replacement  Transaction  with Party B, then such
      Unfunded  Amount  shall be due on the next  subsequent  Distribution  Date
      following  the date on which  the  payment  would  have  been  payable  as
      determined  in accordance  with Section  6(d)(ii),  and on any  subsequent
      Distribution  Dates until paid in full (or if such Early  Termination Date
      is  the  final  Distribution  Date,  on  such  final  Distribution  Date);
      provided,  however,  that if the date on which the payment would have been
      payable  as  determined  in   accordance   with  Section   6(d)(ii)  is  a
      Distribution Date, such payment will be payable on such Distribution Date.

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(i)   Rating Agency  Notifications.  Notwithstanding any other provision of this
      Agreement,  no Early  Termination  Date  shall be  effectively  designated
      hereunder  by Party B and no transfer of any rights or  obligations  under
      this Agreement shall be made by either party unless each Rating Agency has
      been provided prior written notice of such designation or transfer.

(j)   No Set-off. Except as expressly provided for in Section 2(c), Section 6 or
      Part 1(f)(i)(D)  hereof, and  notwithstanding  any other provision of this
      Agreement  or  any  other  existing  or  future   agreement,   each  party
      irrevocably  waives any and all rights it may have to set off, net, recoup
      or otherwise  withhold or suspend or condition  payment or  performance of
      any  obligation  between  it and the other  party  hereunder  against  any
      obligation  between  it and the other  party  under any other  agreements.
      Section 6(e) shall be amended by deleting  the  following  sentence:  "The
      amount,  if any,  payable  in  respect  of an Early  Termination  Date and
      determined pursuant to this Section will be subject to any Set-off.".

(k)   Amendment.   Notwithstanding   any  provision  to  the  contrary  in  this
      Agreement,  no amendment of either this Agreement or any Transaction under
      this  Agreement  shall be  permitted  by either  party  unless each of the
      Rating Agencies has been provided prior written notice of the same and the
      Rating Agency Condition is satisfied with respect to S&P and Fitch.

(l)   Notice of  Certain  Events  or  Circumstances.  Each  Party  agrees,  upon
      learning of the  occurrence  or existence  of any event or condition  that
      constitutes  (or that with the giving of notice or passage of time or both
      would constitute) an Event of Default or Termination Event with respect to
      such party,  promptly  to give the other  Party and to each Rating  Agency
      notice of such event or condition; provided that failure to provide notice
      of such event or condition pursuant to this Part 5(l) shall not constitute
      an Event of Default or a Termination Event.

(m)   Proceedings.  No Relevant  Entity shall  institute  against,  or cause any
      other person to institute against, or join any other person in instituting
      against  Party  B or  the  trust  formed  pursuant  to  the  PSA,  in  any
      bankruptcy,   reorganization,   arrangement,   insolvency  or  liquidation
      proceedings or other  proceedings under any federal or state bankruptcy or
      similar  law for a period  of one year  (or,  if  longer,  the  applicable
      preference   period)  and  one  day  following  payment  in  full  of  the
      Certificates.   This  provision  will  survive  the  termination  of  this
      Agreement.

(n)   Supplemental  Interest  Trustee  Liability  Limitations.  It is  expressly
      understood  and agreed by the parties  hereto that (a) this  Agreement  is
      executed and delivered by Deutsche Bank National  Trust Company  ("DBNTC")
      not in its  individual  capacity,  but  solely  as  Supplemental  Interest
      Trustee  under  the  PSA  in the  exercise  of the  powers  and  authority
      conferred  and  vested  in it  thereunder;  (b)  DBNTC  has been  directed
      pursuant  to the PSA to enter  into  this  Agreement  and to  perform  its
      obligations  hereunder;  (c)  each  of  the  representations,  warranties,
      covenants,  undertakings  and  agreements  herein  made on  behalf  of the
      Supplemental  Interest  Trust  is  made  and  intended  not as a  personal
      representation  of the  Supplemental  Interest  Trustee  but is  made  and
      intended for the purpose of binding only the Supplemental  Interest Trust;
      and (d) nothing  herein  contained  shall be  construed  as  creating  any
      liability on DBNTC,  individually  or personally,  to perform any covenant
      either expressed or implied contained herein (including, for the avoidance
      of doubt,  any liability,  individually or personally,  for any failure or
      delay in making a payment hereunder to Party A due to any failure or delay
      in receiving amounts held in the account held by the Supplemental Interest
      Trust created  pursuant to the PSA or any inability to provide any correct
      withholding   certificate  from  a   Certificateholder   provided  to  the
      Supplemental  Interest  Trustee),  all  such  liability,   if  any,  being
      expressly  waived by the parties who are signatories to this Agreement and
      by any person  claiming by, through or under such parties and (e) under no
      circumstances  shall DBNTC in its individual capacity be personally liable
      for the payment of any  indemnity,  indebtedness,  fees or expenses of the
      Supplemental Interest Trust or any payments hereunder or for the breach or
      failure of any  obligation,  representation,  warranty or covenant made or
      undertaken under this Agreement or any other related documents,  as to all
      of which recourse shall be had solely to the Trust Fund in accordance with
      the terms of the PSA.

(o)   Severability.  If any term,  provision,  covenant,  or  condition  of this
      Agreement, or the application thereof to any party or circumstance,  shall
      be held to be  invalid  or  unenforceable  (in  whole  or in  part) in any
      respect, the remaining terms, provisions, covenants, and conditions hereof
      shall  continue  in full  force and effect as if this  Agreement  had been
      executed with the invalid or unenforceable portion eliminated,  so long as
      this  Agreement  as so modified  continues  to express,  without  material
      change, the original intentions of the parties

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      as to the  subject  matter  of this  Agreement  and the  deletion  of such
      portion of this  Agreement  will not  substantially  impair the respective
      benefits or  expectations  of the parties;  provided,  however,  that this
      severability provision shall not be applicable if any provision of Section
      2, 5, 6, or 13 (or any definition or provision in Section 14 to the extent
      it relates to, or is used in or in connection with any such Section) shall
      be so held to be invalid or unenforceable.

      The parties shall endeavor to engage in good faith negotiations to replace
      any invalid or unenforceable term, provision, covenant or condition with a
      valid or enforceable term, provision,  covenant or condition, the economic
      effect  of which  comes as close as  possible  to that of the  invalid  or
      unenforceable term, provision, covenant or condition.

(p)   Agent  for  Party  B.  Party  A  acknowledges   the   appointment  of  the
      Supplemental  Interest Trustee under PSA to carry out certain functions on
      behalf of Party B, and that the  Supplemental  Interest  Trustee  shall be
      entitled to give  notices and to perform  and satisfy the  obligations  of
      Party B hereunder on behalf of Party B.

(q)   Reserved.

(r)   Consent to  Recording.  Each party hereto  consents to the  monitoring  or
      recording,  at any time and from time to time,  by the other  party of any
      and  all  communications  between  trading,   marketing,   and  operations
      personnel of the parties and their  Affiliates,  waives any further notice
      of such  monitoring or recording,  and agrees to notify such  personnel of
      such monitoring or recording.  Each party agrees to provide such recording
      to the other party upon reasonable request.

(s)   Waiver of Jury Trial.  Each party  waives any right it may have to a trial
      by jury in  respect of any suit,  action or  proceeding  relating  to this
      Agreement or any Credit Support Document.

(t)   Form of ISDA Master  Agreement.  Party A and Party B hereby agree that the
      text of the  body of the  ISDA  Master  Agreement  is  intended  to be the
      printed form of the ISDA Master Agreement (Multicurrency - Crossborder) as
      published  and  copyrighted  in  1992  by  the  International   Swaps  and
      Derivatives Association, Inc.

(u)   Payment  Instructions.  Party A hereby  agrees  that,  unless  notified in
      writing  by Party B of other  payment  instructions,  any and all  amounts
      payable  by Party A to Party B under this  Agreement  shall be paid to the
      account specified in Item 4 of this Long-form Confirmation, below.

(v)   Additional representations.

      (i)   Representations  of Party A.  Party A  represents  to Party B on the
            date on which Party A enters into each Transaction that:--

            (1)   Party A's  obligations  under this  Agreement  rank pari passu
                  with  all  of  Party  A's  other   unsecured,   unsubordinated
                  obligations except those obligations preferred by operation of
                  law.

            (2)   Party A is a bank subject to the requirements of 12 U.S.C. ss.
                  1823(e),  its  execution,  delivery  and  performance  of this
                  Agreement   (including  the  Credit  Support  Annex  and  each
                  Confirmation)  have been approved by its board of directors or
                  its loan committee,  such approval is reflected in the minutes
                  of said  board  of  directors  or  loan  committee,  and  this
                  Agreement   (including  the  Credit  Support  Annex  and  each
                  Confirmation)  will  be  maintained  as one  of  its  official
                  records continuously from the time of its execution (or in the
                  case of any Confirmation,  continuously until such time as the
                  relevant Transaction matures and the obligations therefore are
                  satisfied in full).

      (ii)  Capacity. Party A represents to Party B on the date on which Party A
            enters into each  Transaction that it is entering into the Agreement
            and the Transaction as principal and not as agent of any person. The
            Supplemental  Interest Trustee  represents to Party A on the date on
            which the Supplemental Interest Trustee executes this Agreement that
            it is executing the Agreement not in its  individual  capacity,  but
            solely as Supplemental Interest Trustee under the PSA.

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(w)   Acknowledgements.

      (i)   Substantial  financial  transactions.  Each  party  hereto is hereby
            advised and  acknowledges as of the date hereof that the other party
            has engaged in (or refrained from engaging in) substantial financial
            transactions and has taken (or refrained from taking) other material
            actions  in  reliance  upon  the  entry  by  the  parties  into  the
            Transaction being entered into on the terms and conditions set forth
            herein and in the PSA relating to such  Transaction,  as applicable.
            This  paragraph  shall be deemed  repeated on the trade date of each
            Transaction.

      (ii)  Bankruptcy  Code.   Subject  to  Part  5(m),  without  limiting  the
            applicability if any, of any other provision of the U.S.  Bankruptcy
            Code  as  amended  (the  "Bankruptcy   Code")   (including   without
            limitation   Sections  362,  546,  556,  and  560  thereof  and  the
            applicable   definitions  in  Section  101  thereof),   the  parties
            acknowledge and agree that all  Transactions  entered into hereunder
            will constitute  "forward contracts" or "swap agreements" as defined
            in Section 101 of the  Bankruptcy  Code or "commodity  contracts" as
            defined in Section 761 of the  Bankruptcy  Code,  that the rights of
            the  parties  under  Section  6 of this  Agreement  will  constitute
            contractual  rights to  liquidate  Transactions,  that any margin or
            collateral provided under any margin, collateral,  security, pledge,
            or  similar  agreement  related  hereto  will  constitute  a "margin
            payment" as defined in Section 101 of the Bankruptcy  Code, and that
            the  parties  are  entities   entitled  to  the  rights  under,  and
            protections  afforded by,  Sections  362,  546,  556, and 560 of the
            Bankruptcy Code.

(x)   Reserved.

(y)   Reserved.

(z)   Additional Definitions.

      As used in this Agreement, the following terms shall have the meanings set
      forth below, unless the context clearly requires otherwise:

      "Approved  Ratings  Threshold"  means  each  of the S&P  Approved  Ratings
      Threshold and the Fitch First Trigger Ratings Threshold.

      "Approved  Replacement"  means,  with  respect to a Market  Quotation,  an
      entity making such Market Quotation, which entity would satisfy conditions
      (a),  (b), (c) and (d) of the  definition  of  Permitted  Transfer if such
      entity  were a  Transferee,  as defined  in the  definition  of  Permitted
      Transfer.

      "Derivative  Provider  Trigger  Event"  means (i) an Event of Default with
      respect to which Party A is a Defaulting  Party,  (ii) a Termination Event
      with  respect  to  which  Party A is the sole  Affected  Party or (iii) an
      Additional  Termination  Event with  respect to which  Party A is the sole
      Affected Party.

      "Eligible  Guarantee" means an unconditional and irrevocable  guarantee of
      all present and future  obligations  of Party A under this  Agreement (or,
      solely for purposes of the definition of Eligible Replacement, all present
      and future  obligations of such Eligible  Replacement under this Agreement
      or its  replacement,  as  applicable)  which is provided by a guarantor as
      principal  debtor rather than surety and which is directly  enforceable by
      Party B (together  with a legal  opinion  from a law firm  confirming  the
      enforceability of the guarantee) the form and substance of which guarantee
      and legal opinion are subject to the Rating Agency  Condition with respect
      to S&P and  Fitch,  and  either  (A) a law firm has given a legal  opinion
      confirming  that none of the  guarantor's  payments  to Party B under such
      guarantee will be subject to deduction or Tax collected by withholding and
      such opinion has been delivered to Fitch,  or (B) such guarantee  provides
      that,  in the event that any of such  guarantor's  payments to Party B are
      subject to deduction or Tax collected by  withholding,  such  guarantor is
      required to pay such additional  amount as is necessary to ensure that the
      net  amount  actually  received  by  Party B (free  and  clear  of any Tax
      collected  by  withholding)  will equal the full amount Party B would have
      received had no such deduction or withholding been required, or (C) in the
      event that any payment  under such  guarantee  is made net of deduction or
      withholding for Tax, Party A is required,  under Section 2(a)(i),  to make
      such  additional  payment as is  necessary  to ensure  that the net amount
      actually received by Party B from the guarantor will equal the full amount
      Party B would have  received  had no such  deduction or  withholding  been
      required.

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      "Eligible Replacement" means an entity (A) that lawfully could perform the
      obligations owing to Party B under this Agreement (or its replacement,  as
      applicable),  and  (B)  (I)  (x)  which  has  a  long-term  unsecured  and
      unsubordinated  debt  rating  from S&P of at least  "AA-" and, if it has a
      short-term  unsecured  and  unsubordinated  debt  rating  from  S&P,  such
      short-term  rating  is at least  equal to the  threshold  set forth in the
      definition of S&P Required Ratings Threshold or (y) all present and future
      obligations  of which entity owing to Party B under this Agreement (or its
      replacement,  as  applicable)  are  guaranteed  pursuant  to  an  Eligible
      Guarantee  provided by a guarantor  which has a  long-term  unsecured  and
      unsubordinated  debt  rating  from S&P of at least  "AA-" and, if it has a
      short-term  unsecured  and  unsubordinated  debt  rating  from  S&P,  such
      short-term  rating  is at least  equal to the  threshold  set forth in the
      definition of S&P Required Ratings  Threshold,  in either case if S&P is a
      Rating  Agency,  and  (II)  (x)  which  has  a  long-term   unsecured  and
      unsubordinated  debt rating from Fitch of at least "AA-" and a  short-term
      unsecured  and  unsubordinated  debt  rating from Fitch of "F1" or (y) all
      present and future obligations of which entity owing to Party B under this
      Agreement (or its replacement,  as applicable) are guaranteed  pursuant to
      an Eligible Guarantee  provided by a guarantor with a long-term  unsecured
      and  unsubordinated  debt  rating  from  Fitch  of at  least  "AA-"  and a
      short-term unsecured and unsubordinated debt rating from Fitch of "F1", in
      either case if Fitch is a Rating Agency.  All credit ratings  described in
      this  definition of Eligible  Replacement  shall be provided to Party B in
      writing if requested by Party B.

      "Estimated  Swap  Termination  Payment"  means,  with  respect to an Early
      Termination  Date, an amount  determined by Party A in good faith and in a
      commercially  reasonable  manner as the maximum payment that could be owed
      by Party B to Party A in respect of such Early  Termination  Date pursuant
      to Section  6(e) (as amended  herein),  taking into  account  then current
      market conditions.

      "Financial  Institution" means a bank,  broker/dealer,  insurance company,
      structured investment company or derivative product company.

      "Firm  Offer"  means a quotation  from an Eligible  Replacement  (i) in an
      amount  equal  to  the  actual  amount   payable  by  or  to  Party  B  in
      consideration   of  an  agreement   between  Party  B  and  such  Eligible
      Replacement  to replace Party A as the  counterparty  to this Agreement by
      way of novation or, if such novation is not possible, an agreement between
      Party  B and  such  Eligible  Replacement  to  enter  into  a  Replacement
      Transaction  (assuming that all Transactions  hereunder become  Terminated
      Transactions),  and  (ii)  that  constitutes  an  offer  by such  Eligible
      Replacement  to replace Party A as the  counterparty  to this Agreement or
      enter a Replacement Transaction that will become legally binding upon such
      Eligible Replacement upon acceptance by Party B.

      "Fitch" means Fitch Ratings Ltd., or any successor thereto.

      "Fitch First Trigger Ratings  Threshold"  means,  with respect to Party A,
      the guarantor under an Eligible Guarantee,  or an Eligible Replacement,  a
      long-term unsecured and unsubordinated debt rating from Fitch of "A" and a
      short-term unsecured and unsubordinated debt rating from Fitch of "F1".

      "Fitch Second Trigger  Downgrade  Event" means that no Relevant Entity has
      credit  ratings  from  Fitch at least  equal to the Fitch  Second  Trigger
      Ratings Threshold.

      "Fitch Second Trigger Ratings  Threshold"  means, with respect to Party A,
      the guarantor under an Eligible Guarantee,  or an Eligible Replacement,  a
      long-term  unsecured and unsubordinated debt rating from Fitch of "A-" and
      a short-term unsecured and unsubordinated debt rating from Fitch of "F2".

      "Permitted  Transfer" means a transfer by novation by Party A, pursuant to
      Section 6(b)(ii) which is described in Sections 7(a)(2) or (3) (as amended
      herein),   to  a  transferee  (the  "Transferee")  of  Party  A's  rights,
      liabilities,  duties and obligations under this Agreement, with respect to
      which  transfer  each of the following  conditions  is satisfied:  (a) the
      Transferee is an Eligible Replacement;  (b) Party A and the Transferee are
      both  "dealers  in  notional  principal  contracts"  within the meaning of
      Treasury regulations section 1.1001-4; (c) as of the date of such transfer
      the  Transferee  would not be required to withhold or deduct on account of
      Tax from any payments  under this  Agreement or would be required to gross
      up for such Tax  under  Section  2(d)(i)(4);  (d) an Event of  Default  or
      Termination  Event would not occur as a result of such  transfer;  (e) the
      Transferee  contracts with Party B pursuant to a written  instrument  (the
      "Transfer  Agreement") (A) (i) on terms which are effective to transfer to
      the  Transferee  all,  but  not  less  than  all,  of

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      Party A's rights, liabilities,  duties and obligations under the Agreement
      and all relevant  Transactions,  which terms are identical to the terms of
      this  Agreement,  other than party names,  dates relevant to the effective
      date  of  such   transfer,   tax   representations   (provided   that  the
      representations   in  Part  2(a)(i)  are  not   modified)  and  any  other
      representations regarding the status of the substitute counterparty of the
      type included in Part 5(b)(iv),  Part 5(v)(i)(2) or Part 5(v)(ii),  notice
      information  and account  details,  and (ii) each  Rating  Agency has been
      given prior written notice of such transfer,  or (B) (i) on terms that (x)
      have the effect of preserving  for Party B the economic  equivalent of all
      payment and  delivery  obligations  (whether  absolute or  contingent  and
      assuming the  satisfaction of each applicable  condition  precedent) under
      this  Agreement  immediately  before  such  transfer  and (y) are,  in all
      material  respects,  no less beneficial for Party B than the terms of this
      Agreement  immediately before such transfer, as determined by Party B, and
      (ii) the Rating  Agency  Condition  is  satisfied  with respect to S&P and
      Fitch; (f) Party A will be responsible for any costs or expenses  incurred
      in  connection  with such  transfer  (including  any  replacement  cost of
      entering into a replacement transaction);  and (g) such transfer otherwise
      complies with the terms of the PSA.

      "Rating Agency Condition"  means, with respect to any particular  proposed
      act or  omission to act  hereunder  and each Rating  Agency  specified  in
      connection  with such proposed act or omission,  that the party  proposing
      such act or failure to act must consult with each of the specified  Rating
      Agencies  and  receive  from  each  such  Rating   Agency  prior   written
      confirmation  that the  proposed  action  or  inaction  would  not cause a
      downgrade or withdrawal of the then-current rating of any Certificates.

      "Rating Agencies" mean, with respect to any date of determination, each of
      S&P and  Fitch,  to the  extent  that  each  such  rating  agency  is then
      providing  a  rating  for any of the  IndyMac  INDA  Mortgage  Loan  Trust
      2007-AR8  Mortgage   Pass-Through   Certificates,   Series  2007-AR8  (the
      "Certificates").

      "Relevant  Entities"  mean  Party  A and,  to  the  extent  applicable,  a
      guarantor under an Eligible Guarantee.

      "Replacement   Transaction"   means,   with  respect  to  any   Terminated
      Transaction or group of Terminated Transactions, a transaction or group of
      transactions  that (A) has terms which would be effective to transfer to a
      transferee  all, but not less than all, of Party A's rights,  liabilities,
      duties and obligations under this Agreement and all relevant Transactions,
      which terms are identical to the terms of this Agreement, other than party
      names,  dates  relevant  to the  effective  date  of  such  transfer,  tax
      representations (provided that the representations in Part 2(a)(i) are not
      modified)  and any  other  representations  regarding  the  status  of the
      substitute  counterparty  of the  type  included  in Part  5(b)(iv),  Part
      5(v)(i)(2) or Part 5(v)(ii),  notice information and account details, save
      for the  exclusion of  provisions  relating to  Transactions  that are not
      Terminated  Transactions,  or (B) (x) would have the effect of  preserving
      for Party B the economic  equivalent  of any payment or delivery  (whether
      the  underlying  obligation  was absolute or  contingent  and assuming the
      satisfaction of each applicable  condition precedent) under this Agreement
      in  respect  of  such  Terminated   Transaction  or  group  of  Terminated
      Transactions  that would,  but for the  occurrence  of the relevant  Early
      Termination  Date,  have been required  after that date, and (y) has terms
      which are, in all material  respects,  no less beneficial for Party B than
      those of this Agreement (save for the exclusion of provisions  relating to
      Transactions that are not Terminated Transactions), as determined by Party
      B.

      "Required  Ratings  Downgrade  Event"  means that no  Relevant  Entity has
      credit ratings at least equal to the Required Ratings Threshold.

      "Required  Ratings  Threshold"  means  each  of the S&P  Required  Ratings
      Threshold and the Fitch Second Trigger Ratings Threshold.

      "S&P"  means  Standard  &  Poor's  Rating  Services,  a  division  of  The
      McGraw-Hill Companies, Inc., or any successor thereto.

      "S&P  Approved  Ratings  Threshold"  means,  with  respect to Party A, the
      guarantor  under an  Eligible  Guarantee,  or an Eligible  Replacement,  a
      short-term unsecured and unsubordinated debt rating of "A-1" from S&P, or,
      if such entity does not have a  short-term  unsecured  and  unsubordinated
      debt rating from S&P, a long-term unsecured and unsubordinated debt rating
      or counterparty rating of "A+" from S&P.

      "S&P Required  Ratings  Downgrade Event" means that no Relevant Entity has
      credit  ratings  from  S&P at  least  equal  to the S&P  Required  Ratings
      Threshold.

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      "S&P  Required  Ratings  Threshold"  means,  with  respect to Party A, the
      guarantor under an Eligible Guarantee, or an Eligible Replacement,  (I) if
      such  entity  is a  Financial  Institution,  a  short-term  unsecured  and
      unsubordinated  debt rating of "A-2" from S&P, or, if such entity does not
      have a short-term  unsecured  and  unsubordinated  debt rating from S&P, a
      long-term  unsecured and unsubordinated debt rating or counterparty rating
      of "BBB+" from S&P, or (II) if such entity is not a Financial Institution,
      a short-term  unsecured and unsubordinated  debt rating of "A-1" from S&P,
      or, if such entity does not have a short-term unsecured and unsubordinated
      debt rating from S&P, a long-term unsecured and unsubordinated debt rating
      or counterparty rating of "A+" from S&P.

               [Remainder of this page intentionally left blank.]

<PAGE>

Page 24 of 27

Item 4.  Account Details and Settlement Information:

         Payments to Party A:
         A/C With:                  DB Trust Co. Americas, New York
         Swift Code:                BKTRUUS33 / ABA 021001033
         Favour of:                 Deutsche Bank AG, New York
         Account Number:            01 473 969
         Reference:

         Payments to Party B:
                                    Deutsche Bank Trust Co-Americas
         ABA #:                     021-001-033
         Account Number:            01419663
         Account Name:              NYLTD Funds Control - Stars West
         Reference:                 IndyMac INDA Mortgage Loan Trust 2007-AR8
                                    Swap Account

This Agreement may be executed in several  counterparts,  each of which shall be
deemed an original but all of which together  shall  constitute one and the same
instrument.

<PAGE>

Page 25 of 27

We are very  pleased  to have  executed  this  Transaction  with you and we look
forward to completing other transactions with you in the near future.

Very truly yours,

DEUTSCHE BANK AG, NEW YORK BRANCH

By:      /s/ Audrey Kong
         -----------------------------------
         Name:   Audrey Kong
         Title:  Associate

By:      /s/ Costantino Palermo
         -----------------------------------
         Name:   Costantino Palermo
         Title:  Associate

Party B, acting through its duly authorized signatory, hereby agrees to, accepts
and confirms the terms of the foregoing as of the date hereof.

DEUTSCHE  BANK  NATIONAL  TRUST  COMPANY,  NOT IN ITS  INDIVIDUAL  OR  CORPORATE
CAPACITY  BUT  SOLELY  AS  SUPPLEMENTAL   INTEREST  TRUSTEE  ON  BEHALF  OF  THE
SUPPLEMENTAL  INTEREST  TRUST IN  RESPECT OF INDYMAC  INDA  MORTGAGE  LOAN TRUST
2007-AR8

By:      /s/ Jennifer Hermansader
         -----------------------------------
         Name:   Jennifer Hermansader
         Title:  Associate

By:      /s/ Marion Hogan
         -----------------------------------
         Name:   Marion Hogan
         Title:  Associate

REFERENCE NUMBER: N727633N

<PAGE>

Page 26 of 27

                                     Annex A

                    Paragraph 13 of the Credit Support Annex

<PAGE>

Page 27 of 27

                                     Annex B

                               Item 1115 Agreement

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