Document:

Exhibit 10.10

                         Rule 10b5-1 Stock Purchase Plan

      This Rule 10b5-1 Stock Purchase Plan (this " Purchase Plan"), is entered
into on ______, 2007 by and between Citigroup Global Markets Inc. ("Citi" or
"Broker"), Alternative Asset Management Acquisition Corp., a Delaware
corporation (the "Company"), and _____________ ("Sponsor").

      WHEREAS, Sponsor desires to establish a plan that qualifies for the
affirmative defense and safe harbor provided by Rules 10b5-1 ("Rule 10b5-1") and
10b-18 ("Rule 10b-18"), respectively, under the Securities Exchange Act of 1934,
as amended (the "Exchange Act"), to purchase shares of common stock, par value
$0.0001 per share (the "Shares"), of the Company, as described in the Company's
Registration Statement on Form S-1 relating to the initial public offering of
the Company;

      WHEREAS, Sponsor desires to engage Citi as its exclusive agent to purchase
Shares on its behalf in accordance with this Purchase Plan and the Program; and

      WHEREAS, Sponsor has established or, prior to effecting transactions under
this Purchase Plan will establish, an account (the "Account") with Citi by
executing an account agreement and all other necessary ancillary documents with
Citi.

      NOW, THEREFORE, Citi, the Company and Sponsor hereby agree as follows:

1. Engagement of Broker

      During the term of this Purchase Plan, Citi shall act as Sponsor's
exclusive agent to purchase Shares pursuant to this Purchase Plan. Subject to
the terms and conditions set forth herein, Citi hereby accepts such appointment
and engagement.

2. Trading Instructions

      (a) Citi is authorized to begin purchasing Shares as agent for Sponsor
pursuant to this Purchase Plan on the later of (i) 10 Business Days (as defined
below) after the Company files a Current Report on Form 8-K (the "Signing 8-K")
with the Securities and Exchange Commission announcing its execution of a
definitive agreement for a merger, capital stock exchange, asset acquisition,
stock purchase, reorganization or similar business combination with an operating
business (the "Business Combination"), and (ii) 60 calendar days after
termination of the "restricted period" in connection with the Company's initial
public offering under Regulation M (the "Commencement Date"). Citi shall cease
purchasing Shares on the Termination Date (as defined below). The period
beginning on the Commencement Date and ending on the Termination Date is
referred to herein as the "Plan Period". For the avoidance of doubt, Citi shall
not begin purchasing Shares as agent for Sponsor until it receives written
notification from the

<PAGE>

Company and Sponsor of the Commencement Date in accordance with Section 5(a)
herein.

      (b) In accordance with Citi's customary procedures, Citi will deposit
Shares purchased hereunder into the Account against payment to Citi of the
purchase price therefor and commissions and other fees in respect thereof.

      (c) Citi will notify Sponsor of all transactions executed under this
Purchase Plan pursuant to customary trade confirmations, which shall be provided
within 24 hours of each transaction.

      (d) (i) On each day on which the American Stock Exchange (the "Exchange")
is open for trading (each, a "Business Day"), Citi shall use commercially
reasonable efforts to purchase, as agent and for the account of Sponsor, the
lesser of (x) the maximum number of Shares Sponsor could purchase under Rule
10b-18 on such Business Day and (y) the number of Shares to be purchased
pursuant to the Share Repurchase Guidelines set forth on Appendix A hereto.

            (ii) Sponsor shall pay to Broker a commission of $_____ per Share so
purchased.

      (e) Sponsor agrees that this Purchase Plan constitutes an irrevocable
limit order to purchase Shares pursuant to the terms of this Purchase Plan,
including the Share Repurchase Guidelines set forth on Appendix A hereto.

      (f) From the date hereof until the Termination Date, Sponsor agrees to
provide to Broker, on a quarterly basis, statements confirming that Sponsor has
sufficient funds necessary to satisfy its obligations hereunder.

3. Broker's Discretion to Deviate from Trading Instructions

      (a) Subject to the Share Repurchase Guidelines and other terms and
conditions set forth in this Purchase Plan, Citi shall have full discretion with
respect to the execution of all purchases, and Sponsor acknowledges and agrees
that Sponsor does not have, and shall not attempt to exercise, any influence
over how, when or whether to effect such purchases of Shares pursuant to this
Purchase Plan.

      (b) In the event that, on any Business Day, in the opinion of Citi's
counsel, effecting purchases hereunder would result in a violation of applicable
law or a breach of any contract to which Citi or its affiliates are a party or
by which it or its affiliates are bound or such purchases would result in a
violation of applicable law by the Sponsor (collectively, "Restrictions"), Citi
may refrain from purchasing Shares or purchase fewer than the otherwise
applicable number of Shares to be purchased set forth in the Share Repurchase
Guidelines, as determined by Citi, in its discretion with regard to such
Restrictions.

                                       2
<PAGE>

4. Termination Date

      This Purchase Plan shall terminate upon the Termination Date. "Termination
Date" means the earliest of:

      (a) the Business Day immediately preceding the record date for the meeting
of stockholders at which the Company's initial business combination is to be
voted upon by the Company's stockholders;

      (b) the end of the Business Day on which the aggregate purchase price for
all Shares purchased under this Purchase Plan equals $10,000,000;

      (c) the date that Citi receives notice that Sponsor has filed a petition
for bankruptcy or reorganization, or a petition for bankruptcy has been filed
against Sponsor and has not been dismissed within sixty (60) calendar days of
its filing;

      (d) the date that Sponsor or any other person publicly announces a tender
or exchange offer with respect to the Shares or a merger, acquisition,
reorganization, recapitalization or other similar business combination or
transaction as a result of the consummation of which the Shares would be
exchanged or converted into cash, securities or other property; and

      (e) such time as Citi determines, in its sole discretion, that it is
prohibited for any reason from engaging in purchasing activity as Sponsor's
agent under this Purchase Plan.

      If Citi determines that any event specified in Paragraphs (b), (c), (d),
or (e), of this Section 4 has occurred, Citi shall promptly notify Sponsor that
this Purchase Plan has terminated pursuant to the terms of this Section 4 and
the date of such termination.

5. Representations, Warranties and Covenants

      (a) From the date hereof until the Termination Date, each of Company and
Sponsor agree not to discuss with Citi the Company's business, operations or
prospects or any other information likely to be related to the value of the
Shares or likely to influence a decision to sell Shares. Notwithstanding the
preceding sentence, with the approval of counsel to Citi, Sponsor may
communicate with Citi personnel who are not responsible for, and have no ability
to influence, the execution of this Purchase Plan. Notwithstanding the first
sentence in this paragraph, the Company and Sponsor shall jointly provide Broker
with written notification of the Commencement Date not less than five Business
Days prior thereto and the 8-K Per Share Amount (as defined in Appendix

                                       3
<PAGE>

A) as soon as practicable after the Signing 8-K is filed by the Company with the
Securities and Exchange Commission.

      (b) Sponsor represents and warrants to Citi that this Purchase Plan and
the transactions contemplated hereby have been duly authorized by Sponsor.

      (c) The Company represents and warrants to Citi that neither it nor any
"affiliated purchaser" as defined in Rule 10b-18 has made or will make any
purchases of blocks pursuant to the proviso in Rule 10b-18(b)(4) during the four
full calendar weeks immediately preceding the Commencement Date.

      (d) The Company and Sponsor each represent and warrant to Citi that it is
not aware of any material, nonpublic information concerning the Company or its
securities ("Material, Nonpublic Information") and is entering into this
Purchase Plan in good faith and not as part of a plan or scheme to evade the
prohibitions of Rule 10b5-1.

      (e) Citi represents and warrants to the Company and Sponsor that it has
implemented reasonable policies and procedures, taking into consideration the
nature of Citi's business, to ensure that individuals making investment
decisions will not violate the laws prohibiting trading on the basis of
Material, Nonpublic Information. These policies and procedures include those
that restrict any purchase or sale, or the causing of any purchase or sale, of
any security as to which Citi has Material, Nonpublic Information, as well as
those that prevent such individuals from becoming aware of or being in
possession of Material, Nonpublic Information.

      (f) From the date hereof until the Termination Date, Sponsor agrees not to
enter into any hedging transaction with respect to any Shares.

      (g) Each of the Company and Sponsor agrees that, during the period from
the Commencement Date to the date falling that number of days following the
Termination Date equal to the "restricted period" applicable to the Company, it
will not engage in any "distribution" with respect to which the Shares are a
"covered security" (as such terms are defined in Regulation M) or any other
activity that would prohibit repurchase of Shares by Broker.

      (h) Each of the Company and Sponsor represents and warrants that as of the
time of execution of this Purchase Plan, other than the Company entering into
two (2) other purchase plans with Citi and other stockholders of the Company
that are in substantially the same form as this Purchase Plan, neither the
Company nor Sponsor has entered into any similar plan or agreement with respect
to Shares or any security or interest convertible into or exchangeable for
Shares. Other than as set forth above, each of the Company and Sponsor agrees
that without the prior written consent of Broker, neither the Company nor
Sponsor shall, during the Plan Period, directly or indirectly (including,
without limitation, by means of a cash-settled or other derivative instrument)
purchase, offer to purchase, place any bid or limit order that would effect a
purchase of, any Shares (or an equivalent interest, including a unit of
beneficial interest in a trust or

                                       4
<PAGE>

limited partnership or a depository share), or any security convertible into or
exchangeable for Shares.

6. Compliance with the Securities Laws

      (a) It is the intent of the parties that this Purchase Plan comply with
the requirements of Rule 10b5-1(c)(1)(i)(B), and the parties agree that this
Purchase Plan shall be interpreted to comply with the requirements of Rule
10b5-1(c).

      (b) Broker agrees to comply with Rule 10b-18 in effecting purchases of
Shares pursuant to this Purchase Plan.

7. Indemnification

      (a) The Company and Sponsor agree to jointly and severally indemnify and
hold harmless Citi (and its directors, officers, employees and affiliates) from
and against all claims, liabilities, losses, damages and expenses (including
reasonable attorney's fees and costs) arising out of or attributable to (i) any
material breach by the Company or Sponsor of this Purchase Plan (including the
Company's and Sponsor's representations and warranties), and (ii) any violation
by the Company or Sponsor of applicable laws or regulations. This
indemnification will survive the termination of this Purchase Plan. Neither the
Company nor Sponsor will have indemnification obligations hereunder in the case
of gross negligence or willful misconduct of Citi or any other indemnified
person.

      (b) Notwithstanding any other provision herein, no party hereto will be
liable to the other for (i) special, indirect, punitive, exemplary, or
consequential damages, or incidental losses or damages or any kind, including
but not limited to lost profits, lost savings, loss of use of facility or
equipment, regardless of whether arising from breach of contract, warranty,
tort, strict liability or otherwise, and even if advised of the possibility of
such losses or damages or if such losses or damages could have been reasonably
foreseen, or (ii) any failure to perform or for any delay in performance that
results from a cause or circumstance that it beyond its reasonable control,
including but not limited to failure of electronic or mechanical equipment,
strikes, failure of common carrier or utility systems, severe weather, market
disruptions or other causes commonly known as "acts of God".

      (c) The Company and Sponsor acknowledge and agree that Citi has not
provided the Company or Sponsor with any tax, accounting or legal advice with
respect to this Purchase Plan, including whether Sponsor would be entitled to
any of the affirmative defenses under Rule 10b5-1.

8. General

      (a) This Purchase Plan (including any Appendices, Annexes or Exhibits)
constitutes the entire agreement between the parties hereto with respect to the
subject

                                       5
<PAGE>

matter hereof, and supersedes any previous or contemporaneous agreements,
understandings, proposals or promises with respect thereto, whether written or
oral.

      (b) This Purchase Plan will be governed by, and construed in accordance
with, the laws of the State of New York, without regard to such State's conflict
of laws rules.

      (c) This Purchase Plan and each party's rights and obligations hereunder
may not be assigned or delegated without the written permission of the other
party and shall inure to the benefit of each party's successors and permitted
assigns, whether by merger, consolidation or otherwise.

      (d) This Purchase Plan may be executed in two or more counterparts and by
facsimile signature.

                            [Signature Page Follows]

                                       6
<PAGE>

IN WITNESS  WHEREOF,  the  undersigned  have signed this Purchase Plan as of the
date first written above.

                                  Citigroup Global Markets Inc.

                                  By:
                                      ----------------------------------
                                  Name:
                                  Title:

                                  Alternative Asset Management Acquisition Corp.

                                  By:
                                      ----------------------------------
                                  Name:
                                  Title:

                                  [Sponsor]

                                  By:
                                      ----------------------------------
                                  Name:
                                  Title:

                                       7
<PAGE>

                                   APPENDIX A

                           Share Repurchase Guidelines

--------------------------------------------------------------------------------
    Purchase Price Range                        Number of Shares to be Purchased
--------------------------------------------------------------------------------
Greater than the per share                      0
amount held in the Company's
trust account (less taxes payable)
as reported in the Signing 8-K
(the "8-K Per Share Amount")
--------------------------------------------------------------------------------
Less than or equal to the                       Up to $10.0 million aggregate
8-K Per Share Amount.                           purchase price of Shares
                                                (less the aggregate purchase
                                                price of any Shares previously
                                                purchased under the Purchase
                                                Plan prior to such Business
                                                Day).
--------------------------------------------------------------------------------

All Share amounts and limit prices listed herein shall be increased or decreased
                   to reflect stock splits should they occur.

                                       8SIDLEY Draft
                                                                        7/13/07

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

                                INDYMAC MBS, INC.
                                    Depositor

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

                      DEUTSCHE BANK NATIONAL TRUST COMPANY
                                     Trustee

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

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

                     RESIDENTIAL ASSET SECURITIZATION TRUST
                                     2007-A8

                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  Series 2007-H

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

<PAGE>

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>

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

        Section 1.01  Definitions...........................................................10
        Section 1.02  Rules of Construction.................................................46

ARTICLE TWO CONVEYANCE OF MORTGAGE LOANS; REPRESENTATIONS AND WARRANTIES....................48

        Section 2.01  Conveyance of Mortgage Loans..........................................48
        Section 2.02  Acceptance by the Trustee of the Mortgage Loans.......................51
        Section 2.03  Representations, Warranties, and Covenants of the Seller and
                      the Servicer..........................................................53
        Section 2.04  Representations and Warranties of the Depositor as to the
                      Mortgage Loans........................................................55
        Section 2.05  Delivery of Opinion of Counsel in Connection with Substitutions.......55
        Section 2.06  Execution and Delivery of Certificates................................55
        Section 2.07  REMIC Matters.........................................................56

ARTICLE THREE ADMINISTRATION AND SERVICING OF MORTGAGE LOANS................................57

        Section 3.01  Servicer to Service Mortgage Loans....................................57
        Section 3.02  [Reserved]............................................................58
        Section 3.03  Rights of the Depositor and the Trustee in Respect of the
                      Servicer..............................................................58
        Section 3.04  [Reserved]............................................................58
        Section 3.05  Trustee to Act as Servicer............................................58
        Section 3.06  Collection of Mortgage Loan Payments; Certificate Account;
                      Distribution Account..................................................58
        Section 3.07  Collection of Taxes, Assessments and Similar Items; Escrow
                      Accounts..............................................................61
        Section 3.08  Access to Certain Documentation and Information Regarding the
                      Mortgage Loans........................................................62
        Section 3.09  Permitted Withdrawals from the Certificate Account and the
                      Distribution Account..................................................62
        Section 3.10  Maintenance of Hazard Insurance; Maintenance of Primary
                      Insurance Policies....................................................63
        Section 3.11  Enforcement of Due-On-Sale Clauses; Assumption Agreements.............64
        Section 3.12  Realization Upon Defaulted Mortgage Loans.............................65
        Section 3.13  Trustee to Cooperate; Release of Mortgage Files.......................67
        Section 3.14  Documents, Records and Funds in Possession of the Servicer to
                      be Held for the Trustee...............................................68
        Section 3.15  Servicing Compensation................................................68
        Section 3.16  Access to Certain Documentation.......................................69
        Section 3.17  Annual Statement as to Compliance.....................................69
        Section 3.18  Errors and Omissions Insurance; Fidelity Bonds........................69
        Section 3.19  [Reserved]............................................................70
        Section 3.20  Prepayment Charges....................................................70
        Section 3.21  Late Payment Fees.....................................................70

                                       i

<PAGE>

<CAPTION>
<S>     <C>                                                                               <C>
ARTICLE FOUR DISTRIBUTIONS AND ADVANCES BY THE SERVICER.....................................72

        Section 4.01  Advances..............................................................72
        Section 4.02  Priorities of Distribution............................................73
        Section 4.03  Cross-Collateralization; Adjustments to Available Funds...............79
        Section 4.04  [Reserved]............................................................80
        Section 4.05  Allocation of Realized Losses.........................................80
        Section 4.06  Monthly Statements to Certificateholders..............................81
        Section 4.07  [Reserved]............................................................84
        Section 4.08  Determination of Pass-Through Rates for LIBOR Certificates............84

ARTICLE FIVE THE CERTIFICATES...............................................................87

        Section 5.01  The Certificates......................................................87
        Section 5.02  Certificate Register; Registration of Transfer and Exchange of
                      Certificates..........................................................87
        Section 5.03  Mutilated, Destroyed, Lost or Stolen Certificates.....................91
        Section 5.04  Persons Deemed Owners.................................................91
        Section 5.05  Access to List of Certificateholders' Names and Addresses.............91
        Section 5.06  Maintenance of Office or Agency.......................................92

ARTICLE SIX THE DEPOSITOR AND THE SERVICER..................................................93

        Section 6.01  Respective Liabilities of the Depositor and the Servicer..............93
        Section 6.02  Merger or Consolidation of the Depositor or the Servicer..............93
        Section 6.03  Limitation on Liability of the Depositor, the Seller, the
                      Servicer, and Others..................................................93
        Section 6.04  Limitation on Resignation of the Servicer.............................94

ARTICLE SEVEN DEFAULT 95

        Section 7.01  Events of Default.....................................................95
        Section 7.02  Trustee to Act; Appointment of Successor..............................96
        Section 7.03  Notification to Certificateholders....................................97

ARTICLE EIGHT CONCERNING THE TRUSTEE........................................................99

        Section 8.01  Duties of the Trustee.................................................99
        Section 8.02  Certain Matters Affecting the Trustee.................................99
        Section 8.03  Trustee Not Liable for Certificates or Mortgage Loans................101
        Section 8.04  Trustee May Own Certificates.........................................101
        Section 8.05  Trustee's Fees and Expenses..........................................101
        Section 8.06  Eligibility Requirements for the Trustee.............................102
        Section 8.07  Resignation and Removal of the Trustee...............................102
        Section 8.08  Successor Trustee....................................................103
        Section 8.09  Merger or Consolidation of the Trustee...............................104
        Section 8.10  Appointment of Co-Trustee or Separate Trustee........................104
        Section 8.11  Tax Matters..........................................................105

ARTICLE NINE TERMINATION...................................................................108

                                       ii

<PAGE>

<CAPTION>

<S>     <C>                                                                               <C>
        Section 9.01  Termination upon Liquidation or Purchase of the Mortgage Loans.......108
        Section 9.02  Final Distribution on the Certificates...............................109
        Section 9.03  Additional Termination Requirements..................................110

ARTICLE TEN MISCELLANEOUS PROVISIONS.......................................................111

        Section 10.01 Amendment............................................................111
        Section 10.02 Recordation of Agreement; Counterparts...............................112
        Section 10.03 Governing Law........................................................113
        Section 10.04 Intention of Parties.................................................113
        Section 10.05 Notices..............................................................113
        Section 10.06 Severability of Provisions...........................................114
        Section 10.07 Assignment...........................................................114
        Section 10.08 Limitation on Rights of Certificateholders...........................114
        Section 10.09 Inspection and Audit Rights..........................................115
        Section 10.10 Certificates Nonassessable and Fully Paid............................115
        Section 10.11 Official Record......................................................115
        Section 10.12 Protection of Assets.................................................116
        Section 10.13 Qualifying Special Purpose Entity....................................116

ARTICLE ELEVEN EXCHANGE ACT REPORTING......................................................116

        Section 11.01 Filing Obligations...................................................116
        Section 11.02 Form 10-D Filings....................................................116
        Section 11.03 Form 8-K Filings.....................................................118
        Section 11.04 Form 10-K Filings....................................................118
        Section 11.05 Sarbanes-Oxley Certification.........................................120
        Section 11.06 Form 15 Filing.......................................................121
        Section 11.07 Report on Assessment of Compliance and Attestation...................121
        Section 11.08 Use of Subcontractors................................................122
        Section 11.09 Amendments...........................................................122

                                      iii

<PAGE>

<CAPTION>

<S>               <C>                                                                     <C>
                                    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 (other than the Notional Amount Certificates)..A-1

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

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

Exhibit D:        Form of Notional Amount Certificate.......................................D-1

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

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

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

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

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

                                       iv

<PAGE>

<CAPTION>
<S>               <C>                                                                       <C>
Exhibit P:        [Reserved]................................................................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               S-1
                  Compliance Statement.............................................

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

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

</TABLE>

                                       v

<PAGE>

        THIS POOLING AND SERVICING AGREEMENT, dated as of June 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"),

                           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

                         [SUBJECT TO SIDLEY TAX REVIEW]

        The Depositor is the owner of the Trust Fund that is hereby conveyed to
the Trustee in return for the Certificates. The Trust Fund (exclusive of any
amounts in respect of waived Prepayment Charges paid by the Servicer to the
Class P Certificates 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)) for federal income tax purposes will consist of
three REMICs ( "REMIC 1", "REMIC 2" and the "Master REMIC"). Each Certificate,
other than the Class A-R Certificate, will represent ownership of one or more
regular interests in the Master REMIC for purposes of the REMIC Provisions. The
Class A-R Certificate represents ownership of the sole class of residual
interest in each REMIC created hereunder. The Master REMIC will hold as assets
the REMIC 2 Regular Interests. REMIC 2 will hold as assets the REMIC 1 Regular
Interests. REMIC 1 will hold as assets all property of the Trust Fund other than
the interests in any REMIC created under this Agreement. For federal income tax
purposes, each Certificate (other than the Class A-R Certificate) is hereby
designated as a regular interest in the Master REMIC and each REMIC 1 Regular
Interest and REMIC 2 Regular Interest, as defined below, is designated as a
regular interest in REMIC 1 and REMIC 2, respectively. 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 Certificates pursuant to Section
3.20(b) will be treated as paid directly by the Servicer to the Class P
Certificates and not as paid by or through any REMIC created hereunder. 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.

                                     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  Pass-Through       Corresponding
REMIC 1 Interests                         Balance            Rate               Loan Group
-----------------                         -------            ----               ----------
<S>                                       <C>                <C>                <C>
A-1  (0.9% of AB Loan Group 1)            (1)                6.000%             2
B-1  (0.1% of AB Loan Group 1)            (1)                6.000%             2
C-1  (Excess of Loan Group 1)             (1)                6.000%             2
X-1                                       (1)                (2)                1
I-PO-1                                    (1)                0.000%             1
A-2  (0.9% of AB Loan Group 2)            (1)                6.250%             2
B-2  (0.1% of AB Loan Group 2)            (1)                6.250%             2

                                       1
<PAGE>

<CAPTION>
<S>                                       <C>                <C>                <C>
C-2  (Excess of Loan Group 2)             (1)                6.250%             2
X-2                                       (1)                (2)                2
I-PO-2                                    (1)                0.000%             2
A-3  (0.9% of AB Loan Group 3)            (1)                6.000%             3
B-3  (0.1% of AB Loan Group 3)            (1)                6.000%             3
1-P                                       $100               (3)                N/A
R-1                                       (4)                (4)                3
</TABLE>

---------------
(1) Each Class A Interest will have a principal balance initially equal to 0.9%
of the Assumed Balance ("AB") of its corresponding Loan Group. Each Class B
Interest will have a principal balance initially equal to 0.1% of the AB of its
corresponding Loan Group. The initial principal balance of each Class C Interest
will equal the excess of the Non-PO Percentage 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 corresponding to such
Loan Group. On each Distribution Date following the allocation of scheduled
principal, prepayments and Realized Losses, the Class X-1 and Class X-2
Interests will have the notional balances and pass through rates of the Class
I-X-1 and Class I-X-2 Components, respectively, and the Class R-1, Class I-PO-1
and Class I-PO-2 Interests will have the principal balances of the Class A-R
Certificates and the Class I-PO-1 and Class I-PO-2 Components, respectively.

(2) For federal income tax purposes, the Pass-Through Rate of the Class X-1 and
Class X-2 Interests for any Distribution Date will be equal to the excess of the
weighted average of the Adjusted Net Mortgage Rates of the related Mortgage
Loans (or, in the case of the Class X-1 Interest, the Adjusted Net Mortgage
Rates of the related Non-Discount Mortgage Loans) over the applicable Required
Coupon.

(3) The Class 1-P Interests will not bear interest. The Class 1-P will be
entitled to all Prepayment Charges collected in respect of the Mortgage Loans.

(4) 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, interest and principal collections (or, in
the case of the A-1, B-1 and C-1 Interests, the Non-PO Percentage of principal
collections) 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) 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 to equal, respectively, 0.9% of the AB and 0.1% of the AB;
and second to the Loan Group's corresponding Class C Interest;

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

        (a) if the Calculation Rate in respect of such Class A and Class B
        Interests is less than the Pass Through Rate in respect of the Group I
        Subordinated Certificates, 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 such outstanding Class A and
        Class B Interests is greater than the Pass-Through Rate in respect of
        the Group II Subordinated Certificates, Principal

                                       2
<PAGE>

        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 B
Interests to equal the Pass Through Rate in respect of the Group I Subordinated
Certificates. 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 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 required to achieve the Calculation Rate, the outstanding
        aggregate Class A and B Interests will not be reduced below 1% of the
        excess of (i) the aggregate Stated Principal Balance of the Mortgage
        Loans as of the end of any Due Period (as adjusted for amounts related
        to the related Class I-PO Component reduced by 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) 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 principal
        balance of the Class A and Class B Interests of which are less than 1%
        of the AB. 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 Mortgage Loans in the Loan Group making the payment, then the
        payment will be treated by the REMIC 1 as a Realized Loss. Conversely,
        if the Mortgage Loans in the Loan Group of the Class C Interest that
        receives such payment have a Weighted Average Adjusted Net Mortgage Rate
        above the Weighted Average Adjusted Net Mortgage Rate of the Mortgage
        Loans in the Loan Group making the payment, then the payment will be
        treated by the REMIC 1 as a reimbursement for prior Realized Losses.

                                     REMIC 2

        The following table sets forth characteristics of the REMIC 2 Regular
Interests:

<TABLE>
<CAPTION>

  ======================== ================ ============== ====================== ================
<S>                        <C>              <C>            <C>                    <C>
                                Class
                              Principal     Pass-Through       Allocation of       Allocation of
     Class Designation         Balance          Rate             Interest            Principal
  ------------------------ ---------------- -------------- ---------------------- ----------------
        Class 2-1-A-1                (1)      6.000%             Class 1-A-1         Class 1-A-1
  ------------------------ ---------------- -------------- ---------------------- ----------------
        Class 2-1-A-2                (1)      6.000%             Class 1-A-2         Class 1-A-2
  ------------------------ ---------------- -------------- ---------------------- ----------------
        Class 2-1-A-3                (1)      6.000%             Class 1-A-3         Class 1-A-3
  ------------------------ ---------------- -------------- ---------------------- ----------------
        Class 2-1-A-4                (1)      6.000%         Class 1-A-4, Class      Class 1-A-4
                                                                    1-A-5
  ------------------------ ---------------- -------------- ---------------------- ----------------
        Class 2-2-A-1                (1)      6.250%             Class 2-A-1         Class 2-A-1
  ------------------------ ---------------- -------------- ---------------------- ----------------
        Class 2-2-A-2                (1)      6.250%             Class 2-A-2         Class 2-A-2
  ------------------------ ---------------- -------------- ---------------------- ----------------
        Class 2-2-A-3                (1)     Floating            Class 2-A-3         Class 2-A-3
  ------------------------ ---------------- -------------- ---------------------- ----------------
        Class 2-2-A-4                (1)     Floating            Class 2-A-4         Class 2-A-4
  ------------------------ ---------------- -------------- ---------------------- ----------------
        Class 2-2-A-5                (1)      6.250%             Class 2-A-5         Class 2-A-5
  ======================== ================ ============== ====================== ================

                                       3
<PAGE>

<CAPTION>

  ======================== ================ ============== ====================== ================
<S>                        <C>              <C>            <C>                    <C>
                                Class
                              Principal     Pass-Through       Allocation of       Allocation of
     Class Designation         Balance          Rate             Interest            Principal
  ------------------------ ---------------- -------------- ---------------------- ----------------
        Class 2-2-A-6                (1)      6.250%             Class 2-A-6         Class 2-A-6
  ------------------------ ---------------- -------------- ---------------------- ----------------
        Class 2-3-A-1                (1)     Variable            Class 3-A-1         Class 3-A-1
  ------------------------ ---------------- -------------- ---------------------- ----------------
       Class 2-I-PO-1                (1)      0.000%                 N/A             Class I-PO
  ------------------------ ---------------- -------------- ---------------------- ----------------
       Class 2-I-PO-2                (1)      0.000%                 N/A             Class I-PO
  ------------------------ ---------------- -------------- ---------------------- ----------------
        Class 2-I-X-1                (1)     6.500%(2)            Class I-X              N/A
  ------------------------ ---------------- -------------- ---------------------- ----------------
        Class 2-I-X-2                (1)     6.500%(2)            Class I-X              N/A
  ------------------------ ---------------- -------------- ---------------------- ----------------
      [Class 2-1-$100]               (1)      6.113%              Class A-R           Class A-R
  ------------------------ ---------------- -------------- ---------------------- ----------------
        Class 2-I-B-1                (1)        (3)              Class I-B-1         Class I-B-1
  ------------------------ ---------------- -------------- ---------------------- ----------------
        Class 2-I-B-2                (1)        (3)              Class I-B-2         Class I-B-2
  ------------------------ ---------------- -------------- ---------------------- ----------------
        Class 2-I-B-3                (1)        (3)              Class I-B-3         Class I-B-3
  ------------------------ ---------------- -------------- ---------------------- ----------------
        Class 2-I-B-4                (1)        (3)              Class I-B-4         Class I-B-4
  ------------------------ ---------------- -------------- ---------------------- ----------------
        Class 2-I-B-5                (1)        (3)              Class I-B-5         Class I-B-5
  ------------------------ ---------------- -------------- ---------------------- ----------------
        Class 2-I-B-6                (1)        (3)              Class I-B-6         Class I-B-6
  ------------------------ ---------------- -------------- ---------------------- ----------------
       Class 2-II-B-1                (1)        (3)             Class II-B-1        Class II-B-1
  ------------------------ ---------------- -------------- ---------------------- ----------------
       Class 2-II-B-2                (1)        (3)             Class II-B-2        Class II-B-2
  ------------------------ ---------------- -------------- ---------------------- ----------------
       Class 2-II-B-3                (1)        (3)             Class II-B-3        Class II-B-3
  ------------------------ ---------------- -------------- ---------------------- ----------------
       Class 2-II-B-4                (1)        (3)             Class II-B-4        Class II-B-4
  ------------------------ ---------------- -------------- ---------------------- ----------------
       Class 2-II-B-5                (1)        (3)             Class II-B-5        Class II-B-5
  ------------------------ ---------------- -------------- ---------------------- ----------------
       Class 2-II-B-6                (1)        (3)             Class II-B-6        Class II-B-6
  ------------------------ ---------------- -------------- ---------------------- ----------------
         [Class 2-P]                 (1)     0.000%(4)             Class P               N/A
  ------------------------ ---------------- -------------- ---------------------- ----------------
         [Class 2-L]                 (1)     0.000%(5)             Class L               N/A
  ------------------------ ---------------- -------------- ---------------------- ----------------
          Class R-2                  N/A      N/A (6)              N/A                    N/A
  ======================== ================ ============== ====================== ================

</TABLE>

(1)     For each Distribution Date, following the allocation of scheduled
        principal, Principal Prepayments and Realized Losses, the principal
        balance for each such Class will be the principal balance in respect of
        the corresponding Class of Certificates set forth under the Column
        titled "Allocation of Principal".

(2)     The Pass-Through Rate of the Class 2-I-X-1 and Class 2-I-X-2 Interests
        for any Distribution Date will be equal to the excess of the weighted
        average of the Adjusted Net Mortgage Rates of the Non-Discount Mortgage
        Loans over the applicable Required Coupon.

(3)     The Calculation Rate.

(4)     The Class 2-P Interest will not be entitled to any interest, but will be
        entitled to 100% of any Prepayment Charges paid on the Mortgage Loans.
        For federal income tax purposes, the Class 2-P Certificate will be
        entitled to 100% of the Class 1-P Regular Interest cash flow.

(5)     The Class 2-L Interest will not be entitled to any interest, but will be
        entitled to 100% of any Late Payments Fees paid on the Mortgage Loans.

(6)     The Class R-2 Interest is the sole class of residual interest in REMIC 2
        and will not be entitled to distributions of principal or interest.

        Scheduled principal, prepayments and Realized Losses will be allocated
to the same Lower Tier Interests in the same manner as such amounts are
allocated to the Master REMIC Classes referenced under the column titled
"Allocation of Principal."

                                       4
<PAGE>

                                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 each
Class of Certificates may be issued in a different amount):

<TABLE>
<CAPTION>

  ======================== ==================== ================ ================= ===============
                                                                                      Integral
                                                                                    Multiples in
                              Initial Class      Pass-Through        Minimum          Excess of
     Class Designation     Certificate Balance       Rate          Denomination       Minimum
  ------------------------ -------------------- ---------------- ----------------- ---------------
<S>                        <C>                  <C>              <C>               <C>
         Class 1-A-1           $141,278,000          6.000%        $  100,000           $1,000
  ------------------------ -------------------- ---------------- ----------------- ---------------
         Class 1-A-2            $21,298,000          6.000%        $     1000               $1
  ------------------------ -------------------- ---------------- ----------------- ---------------
         Class 1-A-3            $13,922,550          6.000%        $  100,000           $1,000
  ------------------------ -------------------- ---------------- ----------------- ---------------
         Class 1-A-4            $5,580,000           6.000%        $  100,000           $1,000
  ------------------------ -------------------- ---------------- ----------------- ---------------
         Class 2-A-1            $77,876,000          6.250%        $  100,000           $1,000
  ------------------------ -------------------- ---------------- ----------------- ---------------
         Class 2-A-2            $14,015,800          6.250%        $     1000               $1
  ------------------------ -------------------- ---------------- ----------------- ---------------
         Class 2-A-3            $51,051,000            (1)         $  100,000           $1,000
  ------------------------ -------------------- ---------------- ----------------- ---------------
         Class 2-A-4          $51,051,000 (3)          (4)         $  100,000(2)        $1,000(2)
  ------------------------ -------------------- ---------------- ----------------- ---------------
         Class 2-A-5            $7,130,200           6.250%        $  100,000           $1,000
  ------------------------ -------------------- ---------------- ----------------- ---------------
        Class 2-A-6             $3,080,000           6.250%        $  100,000           $1,000
  ------------------------ -------------------- ---------------- ----------------- ---------------
        Class 3-A-1             $94,945,912      Variable (5)      $  100,000           $1,000
  ------------------------ -------------------- ---------------- ----------------- ---------------
         Class I-X            $22,366,313 (3)       6.500%         $  100,000(2)        $1,000(2)
  ------------------------ -------------------- ---------------- ----------------- ---------------
        Class I-PO             $554,079               (6)          $   25,000           $1,000
  ------------------------ -------------------- ---------------- ----------------- ---------------
         Class A-R               $100               6.113%         $      100              N/A
  ------------------------ -------------------- ---------------- ----------------- ---------------
        Class I-B-1           $10,948,400         Variable(7)      $   25,000           $1,000
  ------------------------ -------------------- ---------------- ----------------- ---------------
        Class I-B-2           $4,127,800          Variable(7)      $   25,000           $1,000
  ------------------------ -------------------- ---------------- ----------------- ---------------
        Class I-B-3           $2,333,100          Variable(7)      $   25,000           $1,000
  ------------------------ -------------------- ---------------- ----------------- ---------------
        Class I-B-4           $2,512,500          Variable(7)      $  100,000           $1,000
  ------------------------ -------------------- ---------------- ----------------- ---------------
        Class I-B-5           $1,794,700          Variable(7)      $  100,000           $1,000
  ------------------------ -------------------- ---------------- ----------------- ---------------
        Class I-B-6            1,435,834          Variable(7)      $  100,000           $1,000
  ------------------------ -------------------- ---------------- ----------------- ---------------
       Class II-B-1           $2,298,692          Variable(5)      $   25,000           $1,000
  ------------------------ -------------------- ---------------- ----------------- ---------------
       Class II-B-2           $1,099,374          Variable(5)      $   25,000           $1,000
  ------------------------ -------------------- ---------------- ----------------- ---------------
       Class II-B-3            $499,715           Variable(5)      $   25,000           $1,000
  ------------------------ -------------------- ---------------- ----------------- ---------------
       Class II-B-4            $449,744           Variable(5)      $  100,000           $1,000
  ------------------------ -------------------- ---------------- ----------------- ---------------
       Class II-B-5            $399,772           Variable(5)      $  100,000           $1,000
  ------------------------ -------------------- ---------------- ----------------- ---------------
       Class II-B-6            $249,857           Variable(5)      $  100,000           $1,000
  ------------------------ -------------------- ---------------- ----------------- ---------------
          Class P              $100 (8)               N/A          $      100              N/A
  ------------------------ -------------------- ---------------- ----------------- ---------------
          Class L                N/A(9)               N/A              N/A                 N/A
  ======================== ==================== ================ ================= ===============

</TABLE>

(1)     The Class 2-A-3 Certificates will bear interest during each Interest
        Accrual Period at a per annum rate equal to the lesser of (i) LIBOR plus
        0.380% and (ii) 7.00%. The Pass-Through Rate for the Class 2-A-3
        Certificates during the initial Interest Accrual Period is 5.700%.

(2)     Denomination is based on Notional Amount.

(3)     This Class of Certificates is a Class of Notional Amount Certificates,
        will have no Class Certificate Balance and will bear interest on their
        Notional Amount.

                                       5
<PAGE>

(4)     The Class 2-A-4 Certificates will bear interest during each Interest
        Accrual Period at a per annum rate equal to 6.620% minus LIBOR, subject
        to a maximum of 6.620% and a minimum of 0% for that Interest Accrual
        Period. The Pass Through Rate for the Class 2-A-4 Certificates during
        the initial Interest Accrual Period is 1.300% per annum.

(5)     The Pass-Through Rate for this Class of Certificates for the Interest
        Accrual Period for any Distribution Date will equal the Weighted Average
        Adjusted Net Mortgage Rate of the Group 3 Mortgage Loans. The
        Pass-Through Rate for those Classes of Certificates for the Interest
        Accrual Period related to the first Distribution Date is 6.113% per
        annum.

(6)     The Class I-PO Certificates are Principal Only Certificates and are not
        entitled to receive distributions of interest.

(7)     The Pass-Through Rate for each Class of Group I Subordinated
        Certificates for the Interest Accrual Period for any Distribution Date
        will be a per annum rate equal to (i) the sum of (A) 6.00% multiplied by
        the Assumed Balance of the Group 1 Mortgage Loans for that Distribution
        Date, and (B) 6.50% multiplied by the Assumed Balance of the Group 2
        Mortgage Loans for that Distribution Date, divided by (ii) the sum of
        the Assumed Balance for each of Loan Group 1 and Loan Group 2
        immediately prior to that Distribution Date. The Pass-Through Rate for
        each Class of Group I Subordinated Certificates for the first Interest
        Accrual Period is 6.228% per annum.

(8)     The Class P Certificates will not be entitled to any interest, but will
        be entitled to 100% of any Prepayment Charges on the Mortgage Loans. For
        federal income tax purposes, all amounts in respect of waived Prepayment
        Charges paid by the Servicer to the Class P Certificates pursuant to
        Section 3.20(b) will be treated as paid directly by the Servicer to the
        Class P Certificates and not as paid by or through any REMIC created
        hereunder. The Class P Certificates shall be issued as a single
        certificate.

(9)     The Class L Certificates will not evidence an interest in any REMIC and
        will not be entitled to any interest but will be entitled to 100% of the
        Late Payment Fees collected. 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 shall be issued as a single certificate.

      Set forth below are designations of Classes of Certificates to the
categories used herein:

Accretion Directed Certificates........   None.

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

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

                                       6
<PAGE>

Class I-PO Components..................   Class I-PO-1 and Class I-PO-2
                                          Components.

Class I-X Components...................   Class I-X-1 and Class I-X-2
                                          Components.

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

Components.............................   Class I-PO Components and Class I-X
                                          Components

Component Certificates.................   Class I-X and Class I-PO
                                          Certificates.

                                          For purposes of calculating
                                          distributions of principal and
                                          interest and allocation of losses, as
                                          applicable, the Class I-X and Class
                                          I-PO Certificates each will be
                                          comprised of two components, and have
                                          the designations and Initial Component
                                          Balances or Initial Notional Amounts,
                                          as applicable, set forth below:

                                                       Initial Component
                                          Designation  Balance
                                          -----------  -------
                                          I-X-1        $10,452,493
                                          I-X-2        $11,913,819
                                                       Initial Component
                                                       -----------------
                                          Designation  Notional Amount
                                          -----------  ---------------
                                          I-PO-1       $361,394
                                          I-PO-2       $192,684

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 of
                                          any Class that ceases to have a
                                          rating of BBB- (or its equivalent)
                                          or better from at least one Rating
                                          Agency.

Group 1 Senior Certificates ...........   Class 1-A-1, Class 1-A-2,
                                          Class 1-A-3 and Class 1-A-4
                                          Certificates and Class I-PO-1 and
                                          Class I-X-1 Components.

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

Group 2 Senior Certificates............   Class 2-A-1, Class 2-A-2,
                                          Class 2-A-3,

                                       7
<PAGE>

                                          Class 2-A-4, Class 2-A-5
                                          and Class 2-A-6 Certificates and Class
                                          I-PO-2 and Class I-X-2 Components.

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

Group 3 Senior Certificates or Group II   Class 3-A-1 and Class A-R
Senior Certificate.....................   Certificates.

Group I Senior Certificates............   Group 1 Senior Certificates and
                                          Group 2 Senior Certificates.

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

Group I Certificates...................   Group I Senior Certificates and
                                          Group I Subordinated Certificates.

Group II Certificates..................   Group II Senior Certificates and
                                          Group II Subordinated Certificates.

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

LIBOR Certificates.....................   Class 2-A-3 and Class 2-A-4
                                          Certificates.

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

Notional Amount Certificates...........   Class 2-A-4 and Class I-X
                                          Certificates.

Offered Certificates...................   Senior Certificates and the
                                          Class I-B-1, Class I-B-2,
                                          Class I-B-3, Class II-B-1,
                                          Class II-B-2 and Class II-B-3
                                          Certificates.

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

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

Principal Only Certificates............   Class I-PO Certificates.

Private Certificates...................   Class P, Class L, Class I-B-4, Class
                                          I-B-5, Class I-B-6, Class II-B-4,
                                          Class II-B-5 and Class II-B-6
                                          Certificates.

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

Regular Certificates...................   All Classes of Certificates other
                                          than the Class

                                       8
<PAGE>

                                          A-R and Class L Certificates.

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

Retained Certificates..................   Class I-PO and the Subordinated
                                          Certificates.

Senior Certificate Group...............   Each of the Group 1 Senior
                                          Certificates, Group 2 Senior
                                          Certificates and Group 3 Senior
                                          Certificates.

Senior Certificates....................   Group 1 Senior Certificates, Group 2
                                          Senior Certificates and Group 3
                                          Senior Certificates.

Subordinated Certificates..............   Group I Subordinated Certificates
                                          and Group II Subordinated
                                          Certificates.

Subordinated Certificate Group.........   Each of the Group I Subordinated
                                          Certificates and the Group II
                                          Subordinated Certificates.

Super Senior Certificates..............   Class 1-A-1 and Class 2-A-1
                                          Certificates.

Support Certificates...................   Class 1-A-4 and 2-A-6 Certificates.

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

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

      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:  Not applicable.

        Advance: As to any 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  Loan Group:  Either  Aggregate Loan Group I or Aggregate Loan
Group II, as applicable.

                                       10
<PAGE>

        Aggregate Loan Group I: Loan Group 1 and Loan Group 2.

        Aggregate Loan Group II: Loan Group 3.

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

        Allocable Share: As to any Distribution Date and any Mortgage Loan (i)
with respect to each Class I-X Component, (a) the ratio that the excess, if any,
of the Adjusted Net Mortgage Rate with respect to such Mortgage Loan over the
applicable Required Coupon bears to such Adjusted Net Mortgage Rate or (b) if
the Adjusted Net Mortgage Rate with respect to such Mortgage Loan does not
exceed the applicable Required Coupon, zero; (ii) with respect to each Class
I-PO Component, zero and (iii) with respect to any other Class of Group I
Certificates the product of (a) the lesser of (I) the ratio that the related
Required Coupon bears to the Adjusted Net Mortgage Rate of such Mortgage Loan
and (II) one, multiplied by (b) 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 and the Group I Subordinated Certificates,
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 Group I Subordinated Certificates,
pursuant to the definition of Assumed Interest Amount or after a 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 Group I Certificates 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)) or the definition of Assumed Interest Amount, as applicable and (iv)
with respect to any Class of Group II Certificates 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).

        Amount Available for Senior Principal: As to any Distribution Date and
Loan Group, the related Available Funds for such Distribution Date, reduced by
the aggregate amount distributable (or allocable to the Accrual Amount, if
applicable) on such Distribution Date in respect of interest on the related
Senior Certificates pursuant to Section 4.02(a)(1)(iii), Section 4.02(a)(2)(iii)
or Section 4.02(a)(4)(iii).

        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 such Loan
Group received in the month of such Distribution Date and (ii) all Scheduled
Payments relating to such 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; and (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: For a Distribution Date and Loan Group in Aggregate
Loan Group I, the related Group I Subordinated Percentage for that Distribution
Date and that Loan Group of the aggregate

                                       11
<PAGE>

of the Non-PO  Percentage of the 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 Due Date).

        Assumed Interest Amount: With respect to any Distribution Date and each
Class of Subordinated Certificates, one month's interest accrued during the
related Interest Accrual Period at the Pass-Through Rate for such Class on such
Class pro rata share of the applicable 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 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) - (ii),
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,
and 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: The Group I Bankruptcy  Coverage
Termination Date or the Group II Bankruptcy Coverage Termination Date.

        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:  The Group I Bankruptcy Loss Coverage
Amount or the Group II Bankruptcy Loss Coverage Amount.

        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 are authorized or obligated by law or executive order to be closed.

                                       12
<PAGE>

        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%.]

        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 Residential Asset Securitization Trust 2007-A8, Mortgage
Pass-Through Certificates, Series 2007-H."

        Certificate Balance: With respect to any Certificate (other than the
Notional Amount 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, (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 Notional Amount
Certificates and the Class L Certificates do not have Certificate Balances.

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

        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.

                                       13
<PAGE>

        Certifying Person:  As defined in Section 11.05.

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

        Class I-X Component:  As specified in the Preliminary Statement.

        [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 and Class C-2 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 or
Component, the amount by which the aggregate amount described in clause (i) of
the definition of Class Optimal Interest Distribution Amount for such Class or
Component exceeds the amount of interest actually distributed on such Class or
Component on such Distribution Date pursuant to such clause (i).

        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 or Component, on the related Class Certificate
Balance, Component Balance or Component Notional Amount, as applicable,
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 or
Component. All Classes of Certificates will accrue interest on the basis of a
360-day year consisting of twelve 30-day months.

        Class I-PO Component:  As specified in the Preliminary Statement.

        Class I-PO Deferred Amount: As to any Distribution Date and for a Loan
Group in Aggregate Loan Group I, the aggregate of the applicable PO Percentage
of any Realized Loss, other than any Excess Loss, on a Discount Mortgage Loan in
Aggregate Loan Group I to be allocated to the related Class I-PO Component on
such Distribution Date on or prior to the applicable Senior Credit Support
Depletion Date or previously allocated to that Class I-PO Component and not yet
paid to the Holders of the Class I-PO Certificates.

        Class I-X-1 Component Notional Amount: For the Interest Accrual Period
for any Distribution Date, the product of (i) a fraction, the numerator of which
is the excess of (a) the average of the Adjusted Net Mortgage Rates of the
Non-Discount Mortgage Loans in Loan Group 1, weighted on the basis of their
respective Stated Principal Balances 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) over (b) 6.00%, and the denominator of
which is 6.50% and (ii) the aggregate Stated Principal Balance of the
Non-Discount Mortgage Loans in Loan Group 1 as of the first day of the related
Due Period (after giving effect to Principal Prepayments received in the
Prepayment Period ending in that Due Period).

        Class I-X-2 Component Notional Amount: For the Interest Accrual Period
for any Distribution Date, the product of (i) a fraction, the numerator of which
is the excess of (a) the average of the Adjusted Net Mortgage Rates of the
Non-Discount Mortgage Loans in Loan Group 2, weighted on the basis of their
respective Stated Principal Balances as of the first day of the related Due
Period (after giving effect

                                       14
<PAGE>

to Principal Prepayments received in the Prepayment Period ending during that
Due Period) over (b) 6.50% per annum, and the denominator of which is 6.50% per
annum and (ii) the aggregate Stated Principal Balance of the Non-Discount
Mortgage Loans in Loan Group 2 as of the first day of the related Due Period
(after giving effect to Principal Prepayments received in the Prepayment Period
ending in that Due Period).

        Class Subordination Percentage: The Group I Class Subordinated
Percentage or the Group II Class Subordinated Percentage

        Class Unpaid Interest Amounts: As to any Distribution Date and Class or
Component of interest-bearing Certificates, the amount by which the aggregate
Class Interest Shortfalls for such Class or Component on prior Distribution
Dates exceeds the amount distributed on such Class or Component on

        prior Distribution Dates pursuant to clause (ii) of the definition of
Class Optimal Interest Distribution Amount.

        Closing Date:  June 29, 2007.

        CMT Index:  Not applicable.

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

        COFI:  Not applicable.

        COFI Certificates:  Not applicable.

        Commission:  The United States Securities and Exchange Commission.

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

        Component:   As specified in the Preliminary Statement.

        Component Balance: With respect to any Class I-PO Component and any
Distribution Date, the Initial Component Balance of such Class I-PO Component
(A) plus any Subsequent Recoveries added to the Component Balance of such Class
I-PO Component pursuant to Section 4.02, (B) minus the sum of all amounts
applied in reduction of the Component Balance of such Class I-PO Component and
Realized Losses allocated thereto.

        Component Certificates:  As specified in the Preliminary Statement.

        Component Notional Amount: The Class I-X-1 Component Notional Amount or
the Class I-X-2 Component Notional Amount, as applicable.

        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.

                                       15
<PAGE>

        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: Mortgage Administration-IN0708 (IndyMac MBS, Inc.,
Residential Asset Securitization Trust 2007-A8, Mortgage Pass-Through
Certificates, Series 2007-H), and which is the address to which notices to and
correspondence with the Trustee should be directed. With respect to the
Certificate Registrar, the designated office for presentment and surrender of
Certificates for registration transfer, exchange or final payment thereof is
located at 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:  June 1, 2007.

        Cut-off Date Pool Principal Balance:  $458,881,134.82.

        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.

                                       16
<PAGE>

        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.

        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.

        Discount Mortgage Loan: Any Mortgage Loan in a Loan Group with an
Adjusted Net Mortgage Rate that is less than the Required Coupon for that Loan
Group.

        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 Residential Asset
Securitization Trust 2007-A8, Mortgage Pass-Through Certificates, Series
2007-H." Funds in the Distribution Account shall be held in trust for the
Certificateholders for the uses and purposes set forth in this Agreement.

                                       17
<PAGE>

        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 July 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 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.

                                       18
<PAGE>

        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 Loss: For each Loan Group, the amount of any (i) Fraud Loss on
the Mortgage Loans in such Loan Group realized after the related Fraud Loss
Coverage Termination Date, (ii) Special Hazard Loss on the Mortgage Loans in
such Loan Group realized after the related Special Hazard Coverage Termination
Date or (iii) Bankruptcy Loss on the Mortgage Loans in such Loan Group realized
after the related Bankruptcy Coverage Termination Date.

        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.

        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 related
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 2007-H, 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.

                                       19
<PAGE>

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

        Fraud Loss Coverage Amount: The Group I Fraud Loss Coverage Amount or
the Group II Fraud Loss Coverage Amount.

        Fraud Loss Coverage Termination Date: The Group I Fraud Loss Coverage
Termination Date or the Group II Fraud Loss Coverage Termination Date.

        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:  Not applicable.

        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 1 Priority Amount: For any Distribution Date, the sum of (i) the
product of (A) the Scheduled Principal Distribution Amount for Loan Group 1, (B)
the Shift Percentage and (C) the Group 1 Priority Percentage, and (ii) the
product of (A) the Unscheduled Principal Distribution Amount for Loan Group 1,
(B) the Shift Percentage and (C) the Group 1 Priority Percentage.

        Group 1 Priority Percentage: For any Distribution Date and Loan Group 1
the percentage equivalent of a fraction, the numerator of which is the aggregate
Class Certificate Balance of the Class 1-A-3 and Class 1-A-4 Certificates
immediately prior to such Distribution Date and the denominator of which is the
Non-PO Pool Balance for Loan Group 1 as of the first day of the related Due
period of the month of such Distribution Date (after giving effect to Principal
Prepayments received in the Prepayment Period that ends during such Due Period).

        Group 2 Certificates:  As specified in the Preliminary Statement.

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

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

        Group 2 Priority Amount: For any Distribution Date, the sum of (i) the
product of (A) the Scheduled Principal Distribution Amount for Loan Group 2, (B)
the Shift Percentage and (C) the Group 2 Priority Percentage, and (ii) the
product of (A) the Unscheduled Principal Distribution Amount for Loan Group 2,
(B) the Shift Percentage and (C) the Group 2 Priority Percentage.

                                       20
<PAGE>

        Group 2 Priority Percentage: For any Distribution Date and Loan Group 2
the percentage equivalent of a fraction, the numerator of which is the aggregate
Class Certificate Balance of the Class 2-A-5 and Class 2-A-6 Certificates
immediately prior to such Distribution Date and the denominator of which is the
Non-PO Pool Balance for Loan Group 2 as of the first day of the related Due
Period (after giving effect to Principal Prepayments received in the Prepayment
Period that ends during such Due Period).

        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.

        Group I Bankruptcy Loss Coverage Amount: As of any date of
determination, the Group I Bankruptcy Loss Coverage Amount shall equal the
Initial Group I Bankruptcy Loss Coverage Amount as reduced by (i) the aggregate
amount of Bankruptcy Losses allocated to the Group I Certificates since the
Cut-off Date and (ii) any permissible reductions in the Group I Bankruptcy Loss
Coverage Amount as evidenced by a letter of each Rating Agency to the Trustee to
the effect that any such reduction will not result in a downgrading,
qualification or withdrawal of the then current ratings assigned to the Classes
of Certificates rated by it.

        Group I Bankruptcy Coverage Termination Date: The point in time at which
the Group I Bankruptcy Loss Coverage Amount is reduced to zero.

        Group I Certificates:  As specified in the Preliminary Statement.

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

        Group I Fraud Loss Coverage Amount: As of the Closing Date, $7,178,759,
subject to reduction from time to time, by the amount of Fraud Losses allocated
to the Group I Certificates. In addition, on each anniversary of the Cut-off
Date, the Group I Fraud Loss Coverage Amount will be reduced as follows: (a) on
the first, second, third and fourth anniversaries of the Cut-off Date, to an
amount equal to the lesser of (i) 1.00% of the then current Stated Principal
Balance of the Group I Mortgage Loans in the case of the first and second such
anniversary and 0.50% of the then-current Stated Principal Balance of the Group
I Mortgage Loans in the case of the third and fourth such anniversaries and (ii)
the excess of the Group I Fraud Loss Coverage Amount as of the preceding
anniversary of the Cut-off Date over the cumulative amount of Fraud Losses
allocated to the Group I Certificates since such preceding anniversary; and (b)
on the fifth anniversary of the Cut-off Date, to zero.

        Group I Fraud Loss Coverage Termination Date: The point in time at which
the Group I Fraud Loss Coverage Amount is reduced to zero.

        Group I Original Subordinated Principal Balance: With respect to a Loan
Group in Aggregate I on or prior to a Senior Termination Date, the Group I
Subordinated Percentage for that Loan Group of the applicable Non-PO Percentage
of the aggregate Stated Principal Balance of the Mortgage Loans in that Loan
Group as of the Cut-off Date; or if such date is after a Senior Termination
Date, the aggregate Class Certificate Balance of the Group I Subordinated
Certificates as of the Closing Date.

                                       21
<PAGE>

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

        Group I Senior Liquidation Amount: For any Distribution Date and for
each Mortgage Loan in a Loan Group in Aggregate Loan Group I that became a
Liquidated Mortgage Loan during the calendar month preceding the month of the
Distribution Date, the lesser of (a) the Group I Senior Percentage of the
applicable Non-PO Percentage of the Stated Principal Balance of that Mortgage
Loan and (b) either (x) if an Excess Loss was not sustained on the Liquidated
Mortgage Loan during the preceding calendar month, the related Senior Prepayment
Percentage of the applicable Non-PO Percentage of the amount of the Liquidation
Proceeds allocable to principal received on that Mortgage Loan or (y) if an
Excess Loss was sustained on the Liquidated Mortgage Loan during the preceding
calendar month, the Group I Senior Percentage of the applicable Non-PO
Percentage of the amount of the Liquidation Proceeds allocable to principal
received on that Mortgage Loan in that Loan Group.

        Group I Senior Percentage: As to any Senior Certificate Group in the
Group I Senior Certificates and any Distribution Date, the percentage equivalent
of a fraction (which may not exceed 100%), the numerator of which is the
aggregate Class Certificate Balance of the Senior Certificates of such Senior
Certificate Group (other than the Notional Amount Certificates and the Class
I-PO Certificates) immediately before the Distribution Date and the denominator
of which is the aggregate of the applicable Non-PO Percentage of the Stated
Principal Balance of each Mortgage Loan in the related Loan Group in Aggregate
Loan Group I as of the Due Date occurring in the month prior to the month of
that Distribution Date (after giving effect to Principal Prepayments in the
Prepayment Period related to that Due Date); provided, however, that on any
Distribution Date after a Senior Termination Date, the Group I Senior Percentage
of the remaining Senior Certificate Group in the Group I Senior Certificates is
the percentage equivalent of a fraction (which may not exceed 100%), the
numerator of which is the aggregate Class Certificate Balance of the Group I
Senior Certificates (other than the Notional Amount Certificates and the Class
I-PO Certificates) immediately prior to such date and the denominator of which
is the aggregate Class Certificate Balance of all Classes of Group I
Certificates (other than the Notional Amount Certificates and the Class I-PO
Certificates) immediately prior to such Distribution Date.

        Group I Senior Principal Distribution Amount: As to any Distribution
Date and Loan Group in Aggregate Loan Group I, the sum of (i) the Group I Senior
Percentage of the Non-PO Percentage of all amounts described in subclauses (a)
through (d) of clause (i) of the definition of Non-PO Formula Principal Amount
for that Loan Group for such Distribution Date, (ii) the Group I Senior
Liquidation Amount for that Loan Group and Distribution Date, (iii) the related
Senior Prepayment Percentage of the applicable Non-PO Percentage of the amounts
described in subclause (f) of clause (i) of the definition of Non-PO Formula
Principal Amount for that Loan Group and such Distribution Date, and (iv) the
related Senior Prepayment Percentage of any Subsequent Recoveries described in
clause (ii) of the definition of Non-PO Formula Principal Amount for that Loan
Group and such Distribution Date; provided, however, that if a Bankruptcy Loss
that is an Excess Loss is sustained with respect to a Mortgage Loan in that Loan
Group that is not a Liquidated Mortgage Loan, the Group I Senior Principal
Distribution Amount will be reduced on the related Distribution Date by the
Group I Senior Percentage of the applicable Non-PO Percentage of the principal
portion of such Bankruptcy Loss; provided further, however, on any Distribution
Date after a Senior Termination Date, the Group I Senior Principal Distribution
Amount for the remaining Senior Certificate Group of Group I Senior Certificates
will be calculated pursuant to the above formula based on all the Mortgage Loans
in Aggregate Loan Group I, as opposed to the Mortgage Loans in the related Loan
Group.

        Group I Senior Step Down Conditions: With respect to either Loan Group
in Aggregate Loan Group I: (i) the aggregate Stated Principal Balance of all
Mortgage Loans in Aggregate Loan Group I delinquent 60 days or more (averaged
over the preceding six month period) (including Mortgage Loans in foreclosure,
REO Property and Mortgage Loans the mortgagors of which are in bankruptcy), as a

                                       22
<PAGE>

percentage of (a) if such date is on or prior to a Senior Termination Date, the
Group I Subordinated Percentage for that Loan Group of the aggregate of the
applicable Non-PO Percentage of the aggregate Stated Principal Balance of the
related Mortgage Loans or (b) if such date is after a Senior Termination Date,
the aggregate Class Certificate Balance of the Group I Subordinated
Certificates, does not equal or exceed 50%, and (ii) cumulative Realized Losses
on the Mortgage Loans in each Loan Group in Aggregate Loan Group I do not
exceed: (a) commencing with the Distribution Date on the fifth anniversary of
the first Distribution Date, 30% of the Group I Original Subordinated Principal
Balance, (b) commencing with the Distribution Date on the sixth anniversary of
the first Distribution Date, 35% of the Group I Original Subordinated Principal
Balance, (c) commencing with the Distribution Date on the seventh anniversary of
the first Distribution Date, 40% of the Group I Original Subordinated Principal
Balance, (d) commencing with the Distribution Date on the eighth anniversary of
the first Distribution Date, 45% of Group I Original Subordinated Principal
Balance, and (e) commencing with the Distribution Date on the ninth anniversary
of the first Distribution Date, 50% of the Group I Original Subordinated
Principal Balance.

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

        Group I Special Hazard Loss Coverage Amount: With respect to the first
Distribution Date, $3,589,379. With respect to any Distribution Date after the
first Distribution Date, the lesser of (a) the greatest of (i) 1% of the
aggregate of the principal balances of the Mortgage Loans in Aggregate Loan
Group I, (ii) twice the principal balance of the largest Mortgage Loan in
Aggregate Loan Group I and (iii) the aggregate of the principal balances of all
Mortgage Loans in Aggregate Loan Group I secured by Mortgaged Properties located
in the single California postal zip code area having the highest aggregate
principal balance of any such zip code area and (b) the Group I Special Hazard
Loss Coverage Amount as of the Closing Date less the amount, if any, of Special
Hazard Losses allocated to the Group I Certificates since the Closing Date. All
principal balances for the purpose of this definition will be calculated as of
the first day of the calendar month preceding the month of such Distribution
Date after giving effect to Scheduled Payments on the Mortgage Loans in
Aggregate Loan Group I then due, whether or not paid.

        Group I Subordinated Certificates: As specified in the Preliminary
Statement.

        Group I Subordinated Percentage: As to either Loan Group in Aggregate
Loan Group I and Distribution Date on or prior to a Senior Termination Date,
100% minus the Group I Senior Percentage for the Senior Certificate Group
relating to such Loan Group for such Distribution Date. As to any Distribution
Date after a Senior Termination Date, 100% minus the related Group I Senior
Percentage for such Distribution Date.

        Group I Subordinated Principal Distribution Amount: For each
Distribution Date and Loan Group in Aggregate Loan Group I, the sum of: (i) the
Group I Subordinated Percentage of the applicable Non-PO Percentage of all
amounts described in subclauses (a) through (d) of clause (i) of the definition
of Non-PO Formula Principal Amount for that Loan Group and Distribution Date,
(ii) for each Mortgage Loan in that Loan Group that became a Liquidated Mortgage
Loan during the calendar month preceding the month of the Distribution Date, the
applicable Non-PO Percentage of the portion of the Liquidation Proceeds
allocable to principal received on that Mortgage Loan, after application of the
amounts pursuant to clause (ii) of the definition of Group I Senior Principal
Distribution Amount, up to the Group I Subordinated Percentage of the applicable
Non-PO Percentage of the Stated Principal Balance of the Mortgage Loan, (iii)
the related Subordinated Prepayment Percentage of the applicable Non-PO
Percentage of the amounts described in subclause (f) of clause (i) of the
definition of Non-PO Formula Principal Amount for that Loan Group and
Distribution Date, and (iv) the related Subordinated Prepayment Percentage of
any Subsequent Recoveries described in clause (ii) of the definition of Non-PO

                                       23
<PAGE>

Formula Principal Amount for that Loan Group and Distribution Date, reduced by
the amount of any payments in respect of related Class-I-PO Deferred Amounts on
the Distribution Date. Provided, however, that on any Distribution Date after a
Senior Termination Date, the Subordinated Principal Distribution Amount for the
Group I Subordinated Certificates will not be calculated by Loan Group but will
equal the amount calculated pursuant to the formula set forth above based on the
Group I Subordinated Percentage or the related Subordinated Prepayment
Percentage, as applicable, for such Distribution Date with respect to all of the
Mortgage Loans in Aggregate Loan Group I as opposed to the Mortgage Loans in the
related Loan Group.

        Group II Bankruptcy Coverage Termination Date: The point in time at
which the Group II Bankruptcy Loss Coverage Amount is reduced to zero.

        Group II Bankruptcy Loss Coverage Amount: As of any date of
determination, the Group II Bankruptcy Loss Coverage Amount shall equal the
Initial Group II Bankruptcy Loss Coverage Amount as reduced by (i) the aggregate
amount of Bankruptcy Losses allocated to the Group II Certificates since the
Cut-off Date and (ii) any permissible reductions in the Group II Bankruptcy Loss
Coverage Amount as evidenced by a letter of each Rating Agency to the Trustee to
the effect that any such reduction will not result in a downgrading,
qualification or withdrawal of the then current ratings assigned to the Classes
of Certificates rated by it.

        Group II Certificates:  As specified in the Preliminary Statement.

        Group II Class Subordinated Percentage: As to Loan Group 3 and any
Distribution Date, 100% minus the Group II Senior Percentage for such
Distribution Date.

        Group II Fraud Loss Coverage Amount: As of the Closing Date, $999,431,
subject to reduction from time to time, by the amount of Fraud Losses allocated
to the Group II Certificates. In addition, on each anniversary of the Cut-off
Date, the Group II Fraud Loss Coverage Amount will be reduced as follows: (a) on
the first, second, third and fourth anniversaries of the Cut-off Date, to an
amount equal to the lesser of (i) 1.00% of the then current Stated Principal
Balance of the Group II Mortgage Loans in the case of the first and second such
anniversary and 0.50% of the then-current Stated Principal Balance of the Group
II Mortgage Loans in the case of the third and fourth such anniversaries and
(ii) the excess of the Group II Fraud Loss Coverage Amount as of the preceding
anniversary of the Cut-off Date over the cumulative amount of Fraud Losses
allocated to the Group II Certificates since such preceding anniversary; and (b)
on the fifth anniversary of the Cut-off Date, to zero.

        Group II Fraud Loss Coverage Termination Date: The point in time at
which the Group II Fraud Loss Coverage Amount is reduced to zero.

        Group II Original Subordinated Principal Balance: The aggregate Class
Certificate Balance of the Group II Subordinated Certificates as of the Closing
Date

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

        Group II Senior Liquidation Amount: For any Distribution Date and for
each Mortgage Loan in Loan Group 3 that became a Liquidated Mortgage Loan during
the calendar month preceding the month of the Distribution Date, the lesser of
(a) the Group II Senior Percentage of the Stated Principal Balance of that
Mortgage Loan as of the Due Date in the month preceding the month of that
Distribution Date and (b) either (x) if an Excess Loss was not sustained on the
Liquidated Mortgage Loan during the preceding calendar month, the related Senior
Prepayment Percentage of the amount of the Liquidation Proceeds allocable to
principal received on that Mortgage Loan or (y) if an Excess Loss was sustained
on the

                                       24
<PAGE>

Liquidated Mortgage Loan during the preceding calendar month, the Group
II Senior Percentage of the amount of the Liquidation Proceeds allocable to
principal received on that Mortgage Loan in that Loan Group.

        Group II Senior Percentage: As to any Distribution Date and the Group II
Senior Certificates, the percentage equivalent of a fraction, the numerator of
which is the aggregate Class Certificate Balance of the Group II Senior
Certificates immediately before the Distribution Date and the denominator of
which is the aggregate Class Certificate Balance of Group II Certificates
immediately prior to such Distribution Date.

        Group II Senior Principal Distribution Amount: As to any Distribution
Date and Loan Group 3, the sum of (i) the Group II Senior Percentage of all
amounts described in subclauses (a) through (d) of clause (i) of the definition
of Principal Amount for such Distribution Date, (ii) the Group II Senior
Liquidation Amount for such Distribution Date, and (iii) the related Senior
Prepayment Percentage of the amounts described in subclauses (f) and (g) of
clause (i) of the definition of Principal Amount for such Distribution Date;
provided, however, that if a Bankruptcy Loss that is an Excess Loss is sustained
with respect to a Mortgage Loan in that Loan Group that is not a Liquidated
Mortgage Loan, the Group II Senior Principal Distribution Amount will be reduced
on the related Distribution Date by the Group II Senior Percentage of the
principal portion of such Bankruptcy Loss.

        Group II Senior Step Down Conditions: With respect to the Mortgage Loans
in Loan Group 3: (i) the aggregate Stated Principal Balance of all Mortgage
Loans in Loan Group 3 delinquent 60 days or more (averaged over the preceding
six month period) (including Mortgage Loans in foreclosure, REO Property and
Mortgage Loans the mortgagors of which are in bankruptcy), as a percentage of
the aggregate Class Certificate Balance of the Group II Subordinated
Certificates immediately prior to that Distribution Date, does not equal or
exceed 50%, and (ii) cumulative Realized Losses on the Mortgage Loans in Loan
Group 3 do not exceed: (a) commencing with the Distribution Date on the fifth
anniversary of the first Distribution Date, 30% of the Group II Original
Subordinated Principal Balance, (b) commencing with the Distribution Date on the
sixth anniversary of the first Distribution Date, 35% of the Group II Original
Subordinated Principal Balance, (c) commencing with the Distribution Date on the
seventh anniversary of the first Distribution Date, 40% of the Group II Original
Subordinated Principal Balance, (d) commencing with the Distribution Date on the
eighth anniversary of the first Distribution Date, 45% of the Group II Original
Subordinated Principal Balance, and (e) commencing with the Distribution Date on
the ninth anniversary of the first Distribution Date, 50% of the Group II
Original Subordinated Principal Balance.

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

        Group II Special Hazard Loss Coverage Amount: With respect to the first
Distribution Date, $ 999,431. With respect to any Distribution Date after the
first Distribution Date, the lesser of (a) the greatest of (i) 1% of the
aggregate of the principal balances of the Mortgage Loans in Aggregate Loan
Group II, (ii) twice the principal balance of the largest Mortgage Loan in
Aggregate Loan Group II and (iii) the aggregate of the principal balances of all
Mortgage Loans in Aggregate Loan Group II secured by Mortgaged Properties
located in the single California postal zip code area having the highest
aggregate principal balance of any such zip code area and (b) the Group II
Special Hazard Loss Coverage Amount as of the Closing Date less the amount, if
any, of Special Hazard Losses allocated to the Group II Certificates since the
Closing Date. All principal balances for the purpose of this definition will be
calculated as of the first day of the calendar month preceding the month of such
Distribution Date after giving effect to Scheduled Payments on the Mortgage
Loans in Aggregate Loan Group II then due, whether or not paid.

                                       25
<PAGE>

        Group II Subordinated Certificates: As specified in the Preliminary
Statement.

        Group II Subordinated Principal Distribution Amount: For any
Distribution Date and Loan Group 3, the sum of: (i) the Group II Subordinated
Percentage of all amounts described in clauses (a) through (d) of the definition
of Principal Amount and that Distribution Date, (ii) for each Mortgage Loan in
that Loan Group that became a Liquidated Mortgage Loan during the calendar month
preceding the month of the Distribution Date, the portion of the Liquidation
Proceeds allocable to principal received on that Mortgage Loan, after
application of the amounts pursuant to clause (ii) of the definition of Group II
Senior Principal Distribution Amount for that Loan Group up to the related Group
II Subordinated Percentage of the Stated Principal Balance of that Mortgage
Loan, and (iii) the related Subordinated Prepayment Percentage for that Loan
Group of the amounts described in clauses (f) and (g) of the definition of
Principal Amount for that Distribution Date.

        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 Group I Bankruptcy Loss Coverage Amount:  $100,000.

        Initial Group II Bankruptcy Loss Coverage Amount:  $100,000.

        Initial Component Balance:  As specified in the Preliminary Statement.

        Initial LIBOR Rate:  5.32% 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 and Component 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 one-month period commencing on the
25th day of the month preceding the month in which such Distribution Date occurs
and ending on the 24th day of the month in which such Distribution Date occurs.
All Classes of Certificates will accrue interest on the basis of a 360-day year
consisting of twelve 30-day months.

        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 Settlement Rate:  As defined in Section 4.08.

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

                                       26
<PAGE>

        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, calculated on 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 4.08.

        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 of the Mortgage Loans identified as Group 1 Mortgage
Loans on the Mortgage Loan Schedule.

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

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

        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.

                                       27
<PAGE>

        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.

        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.

        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 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), 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;

                                       28
<PAGE>

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

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

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

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

               (x)    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;

               (xi)   the Mortgage Rate;

               (xii)  the purpose for the Mortgage Loan;

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

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

               (xv)   the Servicing Fee Rate;

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

               (xvii) the coverage amount of any mortgage insurance;

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

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

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

               (xxi)  the type of Prepayment Charge 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, for each Aggregate Loan Group 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.

                                       29
<PAGE>

        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 exceeds the sum of (a) the Compensating Interest allocable
to such Loan Group for such Distribution Date and (b) in the case of Aggregate
Loan Group I, the excess, if any, of the Compensating Interest allocable to the
other Loan Group in Aggregate Loan Group I for such Distribution Date over the
Prepayment Interest Shortfalls for such other Loan Group in Aggregate Loan Group
I and such Distribution Date.

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

        Non-Discount Mortgage Loan: Any Mortgage Loan with an Adjusted Net
Mortgage Rate that is greater than or equal to the Required Coupon for the
related Loan Group.

        Non-PO Formula Principal Amount: As to any Distribution Date and Loan
Group in Aggregate Loan Group I, the sum of (i) the applicable Non-PO Percentage
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 or
another person pursuant to this Agreement as of such Distribution Date excluding
any Mortgage Loan repurchased pursuant to Section 3.12, (c) the Substitution
Adjustment Amount in connection with any Deleted Mortgage Loan in that Loan
Group received with respect to such 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, and (f) all partial and full
Principal Prepayments on the Mortgage Loans in that Loan Group received during
the related Prepayment Period, and (ii) (A) 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, or (B) with respect to
Subsequent Recoveries attributable to a Discount Mortgage Loan in that Loan
Group that incurred (1) an Excess Loss or (2) a Realized Loss after the
applicable Senior Credit Support Depletion Date, the Non-PO Percentage of any
Subsequent Recoveries received during the calendar month preceding the month of
such Distribution Date.

        Non-PO Percentage: As to any Discount Mortgage Loan in a Loan Group in
Aggregate Loan Group I, a fraction (expressed as a percentage) the numerator of
which is the Adjusted Net Mortgage Rate of such Discount Mortgage Loan and the
denominator of which is the Required Coupon for the related Loan Group. As to
any Non-Discount Mortgage Loan in a Loan Group in Aggregate Loan Group I, 100%.

        Non-PO Pool Balance: For any Loan Group in Aggregate Loan Group I and
any Due Date, the excess, if any, of (x) the aggregate Stated Principal Balance
of all Mortgage Loans in that Loan Group over (y) the sum of the PO Percentage
of the Stated Principal Balance of each Discount Mortgage Loan in that Loan
Group.

        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.

                                       30
<PAGE>

        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: With respect to the Class I-X-1 Certificates and the
Interest Accrual Period for any Distribution Date, an amount equal to the sum of
the Component Notional Amounts of the Components. With respect to the Class
2-A-4 Certificates and any Distribution Date, an amount equal to the Class
Certificate Balance of the Class 2-A-3 Certificates immediately prior to that
Distribution Date.

        Notional Amount Certificates:  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, (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.

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

        Original Applicable Credit Support Percentage: With respect to each of
the following Classes of Subordinated Certificates in the related Subordinated
Certificate Group, the corresponding percentage described below, as of the
Closing Date:

                      Group I Subordinated Certificates
                      ---------------------------------
                      Class I-B-1..........................     6.45%
                      Class I-B-2..........................     3.40%
                      Class I-B-3..........................     2.25%
                      Class I-B-4..........................     1.60%
                      Class I-B-5..........................     0.90%
                      Class I-B-6..........................     0.40%
                      Group II Subordinated Certificates
                      ----------------------------------
                      Class II-B-1.........................     5.00%
                      Class II-B-2.........................     2.70%
                      Class II-B-3.........................     1.60%
                      Class II-B-4.........................     1.10%
                      Class II-B-5.........................     0.65%
                      Class II-B-6.........................     0.25%

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

        OTS:  The Office of Thrift Supervision.

                                       31
<PAGE>

        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.

        Pass-Through Rate: For each Class or Component 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

                                       32
<PAGE>

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 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

                                       33
<PAGE>

        (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

        (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 created hereunder 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.

        PO Formula Principal Amount: As to any Distribution Date and Class I-PO
Component, the sum of (i) the sum of the applicable PO Percentage of (a) the
principal portion of each Scheduled Payment (without giving effect, prior to the
related Bankruptcy Coverage Termination Date, to any reductions thereof caused
by any Debt Service Reductions or Deficient Valuations) due on each Mortgage
Loan in the related Loan Group in Aggregate Loan Group I on the related Due
Date, (b) the Stated Principal Balance of each Mortgage Loan in the related Loan
Group in Aggregate Loan Group I that was repurchased by the Seller or the
Servicer pursuant to this Agreement as of such Distribution Date, excluding any
Mortgage Loan in the related Loan Group in Aggregate Loan Group I that was
repurchased pursuant to Section 3.12, (c) the Substitution Adjustment Amount in
connection with any Deleted Mortgage Loan in the related Loan Group in Aggregate
Loan Group I received with respect to such Distribution Date, (d) any Insurance
Proceeds or Liquidation Proceeds allocable to recoveries of principal of
Mortgage Loans in the related Loan Group in Aggregate Loan Group I 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 the
related Loan Group in Aggregate Loan Group I 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 during the calendar month preceding the month of such
Distribution Date with respect to such Mortgage Loan and (f) all partial and
full Principal Prepayments with respect to the Mortgage Loans in Loan Group I
received during the related Prepayment Period, and (ii) with respect to
Subsequent Recoveries

                                       34
<PAGE>

attributable to a Discount Mortgage Loan in the related Loan Group in Aggregate
Loan Group I that incurred (1) an Excess Loss or (2) a Realized Loss after the
related Senior Credit Support Depletion Date, the PO Percentage of any such
Subsequent Recoveries on the Mortgage Loans in Aggregate Loan Group I received
during the calendar month preceding the month of such Distribution Date.

        PO Percentage: As to any Discount Mortgage Loan in a Loan Group in
Aggregate Loan Group I, a fraction (expressed as a percentage) the numerator of
which is the excess of the Required Coupon over the Adjusted Net Mortgage Rate
of such Discount Mortgage Loan and the denominator of which is such Required
Coupon. As to any Non-Discount Mortgage Loan in a Loan Group in Aggregate Loan
Group I, 0%.

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

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

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

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

        Principal Balance Schedule:  Not applicable.

        Principal Amount: As to any Distribution Date and Loan Group 3, 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 repurchased pursuant to Section 3.12, (c) the Substitution
Adjustment Amount in connection with

                                       35
<PAGE>

any Deleted Mortgage Loan in that Loan Group received with respect to such
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) all
partial and full Principal Prepayments on the Mortgage Loans in that Loan Group
received during the related Prepayment Period, and (g) (A) any Subsequent
Recoveries with respect to the Mortgage Loans in that Loan Group received during
the calendar month preceding the month the Distribution Date, or (B) with
respect to Subsequent Recoveries related to Mortgage Loans in that Loan Group
incurred a Realized Loss after the Senior Credit Support Depletion Date, any
such Subsequent Recoveries received during the calendar month preceding the
month of each 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 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
Regular 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 in a Subordinated Certificate Group, the portion of
the related Subordinated Principal Distribution Amount allocable to such Class,
equal to the product of the related 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 such Subordinated
Certificate Group, 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 June 29, 2007,
relating to the Offered Certificates, and any supplement thereto.

        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,

                                       36
<PAGE>

        (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 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, identified as a "Rating Agency" under the Underwriter's
Exemption, and designated by the Depositor, 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 that 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.

        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.

                                       37
<PAGE>

        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.

        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 Non-Delay Certificates as long as they
are Book-Entry Certificates, the Business Day immediately prior to such
Distribution Date.

        Reference Bank:  As defined in Section 4.08.

        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),

                                       38
<PAGE>

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);

        (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 Cap 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 each month
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 Coupon: With respect to Loan Group 1, 6.00% per annum and with
respect to Loan Group 2, 6.50% per annum.

        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

                                       39
<PAGE>

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).

        Reuters Page LIBOR01: The display page currently so designated as the
"LIBOR01" page on Reuters (or any page replacing that page on that service for
the purpose of displaying comparable rates or prices).

        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.

        Scheduled Principal Distribution Amount: For any Distribution Date and
either Loan Group 1 or Loan Group 2, the related Group I Senior Percentage of
the Non-PO Percentage of all amounts described in subclauses (a) through (d) of
clause (i) of the definition of Non-PO Formula Principal Amount for that Loan
Group for that Distribution Date; provided, however, that if a Bankruptcy Loss
that is an Excess Loss is sustained with respect to a Mortgage Loan in that Loan
Group that is not a Liquidated Mortgage Loan, the Scheduled Principal
Distribution Amount will be reduced on the related Distribution Date by the
applicable Non-PO Percentage of the principal portion of that Bankruptcy Loss.

        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.

                                       40
<PAGE>

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

        Senior Percentage: The Group I Senior Percentage or the Group II Senior
Percentage.

        Senior Prepayment Percentage: As to any Senior Certificate Group and
Distribution Date during the five years beginning on the first Distribution
Date, 100%. For any Distribution Date occurring on or after the fifth
anniversary of the first Distribution Date will, 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
related Senior Percentage of a Senior Certificate Group exceeds the related
initial Senior Percentage for such Senior Certificate Group, in which case the
Senior Prepayment Percentage for each Senior Certificate Group related to the
same Aggregate Loan Group and such Distribution Date will once again equal
100%). Notwithstanding the foregoing, no decrease in the related Senior
Prepayment Percentage will occur unless (a) for the Group I Senior Certificates,
the Group I Senior Step Down Conditions are satisfied with respect to both Loan
Group 1 and Loan Group 2 and (b) for the Group II Senior Certificates, the Group
II Senior Step Down Conditions are satisfied with respect to Loan Group 3.

        Senior Principal Distribution Amount: The Group I Senior Principal
Distribution Amount or the Group II Senior Principal Distribution Amount, as
applicable.

        Senior Step Down Conditions: The Group I Senior Step Down Conditions or
the Group II Senior Step Down Conditions, as applicable.

        Senior Termination Date: For a Senior Certificate Group of Group I
Senior Certificates, the Distribution Date on which the aggregate Class
Certificate Balance of the Classes of Senior Certificates in such Senior
Certificate Group (other than the Notional Amount Certificates and the Class
I-PO 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,

                                       41
<PAGE>

               (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 duties shall be treated as Servicing Advances.

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

        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, the per annum rate specified
on the Mortgage Loan Schedule.

        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.

        Shift Percentage: For any Distribution Date occurring during the five
years beginning on the first Distribution Date, 0%. For any Distribution Date
occurring on or after the fifth anniversary of the first Distribution Date, as
follows: for any Distribution Date in the first year thereafter, 30%; for any
Distribution Date in the second year thereafter, 40%; for any Distribution Date
in the third year thereafter, 60%; for any Distribution Date in the fourth year
thereafter, 80%; and for any Distribution Date thereafter, 100%.

        Special Hazard Coverage Termination Date: The Group I Special Hazard
Coverage Termination Date or the Group II Special Hazard Coverage Termination
Date, as applicable.

        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);

                                       42
<PAGE>

               (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, 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: The Group I Special Hazard Loss
Coverage Amount or the Group II Special Hazard Loss Coverage Amount, as
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.

        Subordinated Certificate Group: As specified in the Preliminary
Statement.

                                       43
<PAGE>

        Subordinated Certificates:  As specified in the Preliminary Statement.

        Subordinated Percentage: The Group I Subordinated Percentage or the
Group II Subordinated Percentage, as applicable.

        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: The Group I Subordinated
Principal Distribution Amount or the Group II Subordinated Principal
Distribution Amount, as applicable.

        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 Loan-to-Value Ratio no higher than that of the Deleted
Mortgage Loan;

        (iv) have a remaining term to maturity not more than one year greater
than (and not more than one year less than) that of the Deleted Mortgage Loan ,
provided that Substitute Mortgage Loans in a Loan Group with a remaining term to
maturity greater than that of the related Deleted Mortgage Loan may not exceed
5% of the aggregate Cut-off Date Principal Balance of the Mortgage Loans in such
Loan Group;

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

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

        Substitution Adjustment Amount:  As defined in Section 2.03.

        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.

        Targeted Balance:  Not Applicable.

        Targeted Principal Classes:  As specified in the Preliminary Statement.

                                       44
<PAGE>

        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

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

        Trustee Fee Rate:  0.0075% 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.

                                       45
<PAGE>

        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.

        Unscheduled Principal Distribution Amount: For any Distribution Date and
either Loan Group 1 or Loan Group 2, the Senior Prepayment Percentage of the
Non-PO Percentage of (x) the sum of the amounts described in subclauses (e) and
(f) of clause (i) of the definition of Non-PO Formula Principal Amount and (y)
the amount described in clause (ii) of the definition of Non-PO Formula
Principal Amount for that Loan Group for that Distribution Date.

         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 each Class of
Notional Amount Certificates (the Voting Rights to be allocated among the
holders of Certificates of each Class in accordance with their respective
Percentage Interests), (b) 1% of all Voting Rights shall be allocated to the
Holder of the Class A-R Certificates and (c) the remaining Voting Rights shall
be allocated among Holders of the remaining Classes of Offered Certificates in
proportion to the Certificate Balances of the respective Certificates on the
date.

        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.

                                       46
<PAGE>

        (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.

        (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.

                                       47
<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 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.

        (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 Loan and either language indicating
        that the Mortgage Loan is a MOM Loan if the Mortgage Loan is a MOM

                                       48
<PAGE>

        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 each 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.

                                       49
<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

                                       50
<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
(28) 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,

                                       51
<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.

        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.

        Any substitution shall not be effected before the delivery to the
Trustee of the Opinion of Counsel, if required by Section 2.05, and any
substitution 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.

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

                                       52
<PAGE>

        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 the representations or warranties made pursuant to
clauses (28) and (33) of Schedule III shall be deemed to materially and
adversely affect the interests of the Certificateholder in the related Mortgage
Loan. 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.

        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

                                       53
<PAGE>

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 to a Mortgage Loan in excess of the 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

                                       54
<PAGE>

repurchase of a Mortgage Loan and a Request for 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.

        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

                                       55
<PAGE>

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.

                                       56
<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.

                                       57
<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.

        (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, to the extent provided in 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
seriously delinquent or defaulted Mortgage Loan,

                                       58
<PAGE>

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 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;

                                       59
<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; and

                (ix) 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. 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.

                                       60
<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) 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 not later than 30 days and not more than 45
days prior to any change of this Agreement.

        (h) 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.

                                       61
<PAGE>

        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.

        Section 3.09 Permitted Withdrawals from the Certificate Account and the
Distribution 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;

                                       62
<PAGE>

                (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 the
        Available Funds, Prepayment Charge and Trustee Fee for the Distribution
        Date, to the extent 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 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.

        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

                                       63
<PAGE>

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 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

                                       64
<PAGE>

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 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

                                       65
<PAGE>

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 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

                                       66
<PAGE>

the calendar month, the excess shall be considered to be a partial prepayment of
principal of the related Mortgage Loan.

        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

                                       67
<PAGE>

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
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.

                                       68
<PAGE>

        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 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.

                                       69
<PAGE>

        Section 3.19 [Reserved].

        Section 3.20 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 Certificates,
by depositing such amount into the Distribution 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 in the Prepayment Charge Schedule
(including the attached prepayment charge summary) 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 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 Certificates 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 3.21 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.

                                       70
<PAGE>

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

                                       71
<PAGE>

                                  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.

                                       72
<PAGE>

        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 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 prior to the Accrual
        Termination Date, the Accrual Amount shall be distributed as provided in
        Section 4.02(a)(1)(ii);

                (ii) [reserved];

                (iii) concurrently, to the Classes of Group 1 Senior
        Certificates as follows:

                (A)     to the Class I-PO-1 Component the related PO Formula
                        Principal Amount until the Component Balance thereof is
                        reduced to zero; and

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

                                1. concurrently, to the Class 1-A-3 and Class
                        1-A-4 Certificates, pro rata, the Group 1 Priority
                        Amount, until their respective Class Certificate
                        Balances are reduced to zero;

                                2. sequentially, to the Class 1-A-1 and Class
                        1-A-2 Certificates, in that order, until their
                        respective Class Certificate Balances are reduced to
                        zero; and

                                3. concurrently, to the Class 1-A-3 and Class
                        1-A-4 Certificates, pro rata, without regard to the
                        Group I Priority Amount, until their respective Class
                        Certificate Balances are reduced to zero; and

                (iv) to the Class I-PO-1 Component, any related Class I-PO
        Deferred Amount, up to an amount not to exceed the amount calculated
        pursuant to the definition of Subordinated Principal Distribution Amount
        for Loan Group 1 actually received or advanced for such Distribution
        Date (with such amount to be allocated first from amounts calculated
        pursuant to (i) and (ii) and then (iii) of the definition of
        Subordinated Principal Distribution Amount for Loan Group 1;

        (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 related Available Funds remaining:

                (i) concurrently, to each interest-bearing Class 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;

                                       73
<PAGE>

        provided that prior to the Accrual Termination Date, the Accrual Amount
        shall be distributed as provided in Section 4.02(a)(2)(ii);

                (ii) [reserved];

                (iii) concurrently, to the Classes of Group 2 Senior
        Certificates as follows:

                (A)     to the Class I-PO-2 Component the related PO Formula
                        Principal Amount until the Component Balance thereof is
                        reduced to zero; and; and

                (B)     on each Distribution Date, the Non-PO Formula Principal
                        Amount for Loan Group 2 up to the amount of the related
                        Group I Senior Principal Distribution Amount for such
                        Distribution Date will be distributed in the following
                        priority:

                        1. concurrently

                           (i) 66.666666667% in the following priority:

                                (a) concurrently, to the Class 2-A-5 and Class
                                2-A-6 Certificates, pro rata, the Group 2
                                Priority Amount, until their respective Class
                                Certificate Balances are reduced to zero;

                                (b) sequentially, to the Class 2-A-1 and Class
                                2-A-2 Certificates, in that order, until their
                                respective Class Certificate Balances are
                                reduced to zero; and

                                (c) concurrently, to the Class 2-A-5 and Class
                                2-A-6 Certificates, pro rata, without regard to
                                the Group 2 Priority Amount, until their
                                respective Class Certificate Balances are
                                reduced to zero; and

                           (ii) 33.33333333%, to the Class 2-A-3
                           Certificates until its Class Certificate Balance
                           is reduced to zero; and

                (iv) to the Class I-PO-2 Component, any related Class I-PO
        Deferred Amount, up to an amount not to exceed the amount calculated
        pursuant to the definition of Subordinated Principal Distribution Amount
        for Loan Group 2 actually received or advanced for such Distribution
        Date (with such amount to be allocated first from amounts calculated
        pursuant to (i) and (ii) and then (iii) of the definition of
        Subordinated Principal Distribution Amount for Loan Group 2;

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

        (4) 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 related Available Funds remaining:

                (i) concurrently, to each interest-bearing Class of Group 3
        Senior Certificates, an amount allocable to interest equal to the
        related Class Optimal Interest Distribution Amount, any

                                       74
<PAGE>

        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 prior to the
        Accrual Termination Date, the Accrual Amount shall be distributed as
        provided in Section 4.02(a)(4)(ii);

                (ii) [reserved];

                (iii) concurrently, to the Classes of Group 3 Senior
        Certificates as follows:

                (A)     on each Distribution Date, the Principal Amount for Loan
                        Group 3 up to the amount of the Group II Senior
                        Principal Distribution Amount for such Distribution Date
                        will be distributed in the following priority:

                        1. to the Class A-R Certificates, until its Class
                Certificate Balance is reduced to zero; and

                        2. to the Class 3-A-1 Certificates, until its Class
                Certificate Balance is reduced to zero; and

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

                (A)     to the Class I-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 I-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;

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

                                       75
<PAGE>

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

                (A)     to the Class II-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 II-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;

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

                                       76
<PAGE>

                (H)     to the Class II-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 II-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 II-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 II-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 II-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;

         (7) to the Class A-R Certificates, any remaining funds; provided, that
such amounts shall not include the $100 held in trust for the Class P
Certificates.

        On each Distribution Date, all amounts representing 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
Certificates. On the Distribution Date immediately following the expiration of
the latest Prepayment Charge Period of the Mortgage Loans, the $100 held in
trust for the Class P Certificates will be distributed to the Class P
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.

        On any Distribution Date, amounts distributed in respect of Class I-PO
Deferred Amounts will not reduce the Class Certificate Balance or Component
Balance of the related Class I-PO Component.

        On any Distribution Date, to the extent the Amount Available for Senior
Principal for a Loan Group in Aggregate Loan Group I is insufficient to make the
full distribution required to be made pursuant to the applicable clause
(a)(iii), (A) the amount distributable on the related Class I-PO Component in
respect of principal shall be equal to the product of (1) the Amount Available
for Senior Principal for such Loan Group and (2) a fraction, the numerator of
which is the related PO Formula Principal Amount and the denominator of which is
the sum of such PO Formula Principal Amount and the applicable Senior Principal
Distribution Amount and (B) the amount distributable on the related Senior
Certificates other than the applicable Class I-PO Component, in respect of
principal shall be equal to the product of (1) such Amount Available for Senior
Principal and (2) a fraction, the numerator of which is the applicable Senior
Principal Distribution Amount and the denominator of which is the sum of such
Senior Principal Distribution Amount and the related PO Formula Principal
Amount.

        (b) On each Distribution Date prior to and including the applicable
Accrual Termination Date with respect to each Class of Accrual Certificates, the
Accrual Amount for such Class for such Distribution Date shall not (except as
provided in the second to last sentence in this paragraph) be

                                       77
<PAGE>

distributed as interest with respect to such Class of Accrual Certificates, but
shall instead be added to the related Class Certificate Balance of such Class on
the related Distribution Date. With respect to any Distribution Date prior to
and including the applicable Accrual Termination Date on which principal
payments on any Class of Accrual Certificates are distributed pursuant to
Section 4.02(a)(1)(iii) or Section 4.02(a)(2)(iii), the related Accrual Amount
shall be deemed to have been added on such Distribution Date to the related
Class Certificate Balance (and included in the amount distributable on the
related Class or Classes or Accretion Directed Certificates pursuant to Section
4.02(a)(1)(iii) or Section 4.02(a)(2)(iii)for such Distribution Date) and the
related distribution thereon shall be deemed to have been applied concurrently
towards the reduction of all or a portion of the amount so added and, to the
extent of any excess, towards the reduction of the Class Certificate Balance of
such Class of Accrual Certificates immediately prior to such Distribution Date.
Notwithstanding any such distribution, each such Class or Component shall
continue to be a Class of Accrual Certificates on each subsequent Distribution
Date until the applicable Accrual Termination Date.

        (c) On each Distribution Date on or after the Senior Credit Support
Depletion Date for the Group I Certificates, notwithstanding the allocation and
priority set forth in Section 4.02(a)(1)(iii)(B) and 4.02(a)(2)(iii)(B), the
Non-PO Formula Principal Amount related to Loan Group 1 and Loan Group 2 up to
the amount of the related Senior Principal Distribution Amount for such
Distribution Date available will be distributed concurrently, as principal, of
the related Classes of Senior Certificates (other than the related Notional
Amount Certificates and the Class I-PO-1 and Class I-X-1 Components), pro rata,
on the basis of their respective Class Certificate Balances, until the Class
Certificate Balances thereof are reduced to zero.

        (d) On each Distribution Date, the amount referred to in clause (i) of
the definition of Class Optimal Interest Distribution Amount for each Class or
Component of Certificates for such Distribution Date shall be reduced by (i) the
related Class's or Component's pro rata share of Net Prepayment Interest
Shortfalls based (x) with respect to a Class or Component of Senior Certificates
or Group I Subordinated Certificates, on the related Class Optimal Interest
Distribution Amount and (y) with respect to a Class of Group II Subordinated
Certificates on or prior to a Senior Termination Date on the Assumed Interest
Amount and after such Senior Termination Date, the related Class' Class Optimal
Interest Distribution Amount for such Distribution Date, without taking into
account such Net Prepayment Interest Shortfalls and (ii) the related Class'
Allocable Share of (A) after the Special Hazard Coverage Termination Date for an
Aggregate Loan Group, with respect to each Mortgage Loan in the related Loan
Group (or, after the related 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) after the Bankruptcy Coverage Termination Date for an Aggregate
Loan Group, with respect to each Mortgage Loan in the related Loan Group (or,
after the related Senior Credit Support Depletion Date, any 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 related Senior Credit
Support Depletion Date, any Mortgage Loan) incurred during the calendar month
preceding the month of such Distribution Date and (D) after the Fraud Loss
Coverage Termination Date for an Aggregate Loan Group, with respect to each
Mortgage Loan in the related Loan Group (or, after the related 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.

                                       78
<PAGE>

        (e) Notwithstanding the priority and allocation contained in Section
4.02(a), if, with respect to any Class of Subordinated Certificates in a
Subordinated Certificate Group, on any Distribution Date the sum of the related
Class Subordination Percentages of such Class and of all Classes of Subordinated
Certificates such Subordinated Certificate Group 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 in such Subordinated
Certificate Group 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 Sections 4.02(a)(5) and 4.02(a)(6), as applicable. 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 or Component Balance of each related Class and Component 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
and Component of Certificates pursuant to Section 4.05. Holders of such
Certificates and Components 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
or Component Balance of each Certificate or Component, as applicable, of such
Class in accordance with its respective Percentage Interest.

        Section 4.03 Cross-Collateralization; Adjustments to Available Funds.

        If on any Distribution Date the Class Certificate Balance of the Group I
Senior Certificates in a Senior Certificate Group is greater than the aggregate
Stated Principal Balance of the Mortgage Loans in the related Loan Group (the
"Undercollateralized Group") in Aggregate Loan Group I, then the Trustee shall
reduce the Available Funds of the other Loan Group in Aggregate Loan Group I to
the extent that it is not undercollateralized (the "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 Pass-Through Rate applicable to the Undercollateralized
        Group and (b) Available Funds of the Overcollateralized Group remaining
        after making distributions to the Certificates of the Overcollateralized
        Group on such Distribution Date pursuant to Section 4.02; and

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

                                       79
<PAGE>

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

        Section 4.04 [Reserved].

        Section 4.05 Allocation of Realized Losses.

        (a) On or prior to each Determination Date, the Trustee shall determine
the total amount of Realized Losses, including Excess Losses, with respect to
each related Distribution Date.

        Realized Losses with respect to a Loan Group and any Distribution Date
shall be allocated as follows:

              (i) the applicable PO Percentage of any Realized Loss on the
        Mortgage Loans in a Loan Group in Aggregate Loan Group I, including any
        Excess Loss, shall be allocated to the related Class I-PO Component
        until its Component Balance is reduced to zero; and

              (ii) (A) (x) the applicable Non-PO Percentage of any Realized Loss
        (other than any Excess Loss) on the Mortgage Loans in a Loan Group in
        Aggregate Loan Group I and (y) any Realized Loss (other than any Excess
        Loss) on the Mortgage Loans in Loan Group 3, shall be allocated first to
        the Classes of Subordinated Certificates in the related Subordinated
        Certificate Group in reverse order of their respective numerical Class
        designations (beginning with the Class of Subordinated Certificates in
        such Subordinated Certificate Group 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 related
        Classes of Senior Certificates in the related Senior Certificate Group
        (other than any Notional Amount Certificates and the related Class I-PO
        Certificates), pro rata on the basis of their respective Class
        Certificate Balances, in each case immediately prior to the related
        Distribution Date, until the respective Class Certificate Balance of
        each such Class is reduced to zero; except that the applicable Non-PO
        Percentage of any Realized Losses on the Mortgage Loans in Loan Group 1
        that would otherwise be allocated to the Class 1-A-1 Certificates will
        instead be allocated to the Class 1-A-4 Certificates until its Class
        Certificate Balance is reduced to zero; and the applicable Non-PO
        Percentage of any Realized Losses on the Mortgage Loans in Loan Group 2
        that would otherwise be allocated to the Class 2-A-1 Certificates will
        instead be allocated to the Class 2-A-6 Certificates until its Class
        Certificate Balance is reduced to zero.

                (B) (x) the applicable Non-PO Percentage of any Excess Losses on
        the Mortgage Loans in a Loan Group in Aggregate Loan Group I shall be
        allocated among the Classes of Group I Senior Certificates of the
        related Senior Certificate Group (other than the related Class I-PO and
        Class I-X Component) and the Group I Subordinated Certificates as
        follows: (i) in the case of the Group I Senior Certificates, the Group I
        Senior Percentage of such Excess Losses shall be allocated among the
        Classes of Group I Senior Certificates in the related Senior Certificate
        Group, pro rata, on the basis of their respective Class Certificate
        Balances immediately prior to the related Distribution Date and (ii) in
        the case of the Group I Subordinated Certificates, the Group I
        Subordinated Percentage of such Excess Loss shall be allocated among the
        Classes of Group I Subordinated Certificates, pro rata, based on each
        Class's share of the Assumed Balance of the related Loan Group
        immediately prior to the related Distribution Date; provided, however,
        on any Distribution Date after a Senior Termination Date for a Senior
        Certificate Group of Group I Senior Certificates, such Excess Losses on
        the Mortgage Loans in the related Loan Group shall be allocated to the
        Group I Senior Certificates and the Group I Subordinated Certificates on
        the basis

                                       80
<PAGE>

        of their respective Class Certificate Balances immediately prior to such
        Distribution Date; provided further, however, on any Distribution Date
        on and after the related Senior Credit Support Depletion Date, any
        Excess Loss shall be allocated, pro rata, among the Classes of Senior
        Certificates (other than the related Class I-PO and Class I-X Component)
        based on their respective Class Certificate Balances immediately prior
        to the related Distribution Date and (y) any Excess Losses on the
        Mortgage Loans in Loan Group 3 shall be allocated to the Classes of
        Group II Senior Certificates and the Classes of Group II Subordinated
        Certificates then outstanding, pro rata, on the basis of their
        respective Class Certificate Balances, in each case immediately prior to
        such Distribution Date and until the respective Class Certificate
        Balances thereof have been reduced to zero and.

        (b) The Class Certificate Balance of the Class of Subordinated
Certificates in Group I Subordinated Certificate Group then outstanding with the
highest numerical Class designation shall be reduced on each Distribution Date
by the sum of (i) the amount of any payments on the related Class I-PO
Component(s) in respect of related Class I-PO Deferred Amounts and (ii) the
amount, if any, by which the aggregate of the Class Certificate Balances of all
outstanding Classes of Certificates relating to the same Aggregate Loan Group
(after giving effect to the distribution of principal and the allocation of
Realized Losses and related Class I-PO Deferred Amounts on such Distribution
Date) exceeds the aggregate Stated Principal Balance of the Mortgage Loans in
such Aggregate Loan Group for the following Distribution Date.

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

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

        (e) Realized Losses shall not be allocated to the Class P and the Class
L Certificates.

        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://www.tss.db.com/invr 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;

                                       81
<PAGE>

                (v) the aggregate amount of expenses paid from amounts on
        deposit in 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;

                (x) the aggregate amount of Realized Losses 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 (including Component
        Balances) or Notional Amount 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 LIBOR rate applicable for that Distribution Date;

                (xiv) the number of Mortgage Loans and the aggregate Stated
        Principal Balance of the Mortgage Loans and the Pool Stated Principal
        Balance as the first day of the related Due Period and the last day of
        the related Due Period;

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

                (A)     the weighted average mortgage rate of the Mortgage
                        Loans, and

                (B)     the weighted average remaining term to maturity of the
                        Mortgage Loans;

                (xvi) the number and aggregate outstanding Stated Principal
        Balance of the Mortgage Loans 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 and

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

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

                                       82
<PAGE>

                (xvii) 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;

                (xviii) 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;

                (xix) the total number and principal balance of any REO
        Properties (and market value, if available) as of the close of business
        on the Determination Date preceding the Distribution Date;

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

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

                (xxii) 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;

                (xxiii) 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;

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

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

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

                (xxvii) the Special Hazard Loss Coverage Amount, the Fraud Loss
        Coverage Amount and the Bankruptcy Loss Coverage Amount, in each case as
        of the related Determination Date;

                (xxviii) with respect to the second Distribution Date, the
        number and aggregate
        balance of any Delayed Delivery Mortgage Loans not delivered within the
        time periods specified in the definition of Delayed Delivery Mortgage
        Loans;

                (xxix) Prepayment Charges collected or waived by the Servicer;

                (xxx) Late Payment Fees collected or waived by the Servicer;

                (xxxi) 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

                                       83
<PAGE>

        the Cut-off Date (in each case immediately prior to the Stated Principal
        Balance being reduced to zero);

                (xxxii) 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

                (xxxiii) 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.

        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.

        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.

        (b) 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.

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)(v) and (a)(vi) 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 [Reserved]

        Section 4.08 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 4.08, 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 Screen LIBO Page (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 a Class of LIBOR
Certificates will be established by the Trustee on each LIBOR Determination Date
as follows:

                                       84
<PAGE>

                (i) If on any LIBOR Determination Date two or more Reference
        Banks provide such offered quotations, LIBOR for the next Interest
        Accrual Period for a Class of 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 a Class of 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 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 each Class of 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, any 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 4.08.

                                       85
<PAGE>

        (f) The establishment of LIBOR and each 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.

                                       86
<PAGE>

                                  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, integral multiples of $1,000 in excess thereof (except that one
Certificate in each Class may be issued in a different amount which must exceed
the applicable minimum denomination) and aggregate denominations per Class set
forth in the Preliminary Statement.

        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.

                                       87
<PAGE>

        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 satisfy 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

                                       88
<PAGE>

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.

        (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

                                       89
<PAGE>

        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 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.

                                       90
<PAGE>

        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. Neither the Servicer, the Depositor nor 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 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 neither the Servicer, the
Trustee nor 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

                                       91
<PAGE>

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 DB Services
Tennessee, 648 Grassmere Park Rd., Nashville, TN 37211-3658, Attention: Transfer
Unit, where Certificates may be surrendered for registration of transfer or
exchange. The Certificate Registrar will give prompt written notice to the
Certificateholders and the Trustee (if other than the Certificate Registrar) of
any change in such location of any such office or agency.

                                       92
<PAGE>

                                  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

                                       93
<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.

                                       94
<PAGE>

                                 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 affected thereby
evidencing not less than 66 2/3% of the Percentage Interests of such 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

                                       95
<PAGE>

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 Eight. 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

                                       96
<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.

                                       97
<PAGE>

        (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.

                                       98
<PAGE>

                                 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 such 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,

                                       99
<PAGE>

instrument, opinion, report, notice, request, consent, order, appraisal, bond or
other paper or document 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 thereof 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

                                      100
<PAGE>

        (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.

        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

                                      101
<PAGE>

        (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
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, 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.

                                      102
<PAGE>

        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.

        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 and (B) the
imposition of such tax would be avoided by the appointment of a different
trustee, 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 Eleven 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

                                      103
<PAGE>

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.

        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

                                      104
<PAGE>

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 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 Eight. 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;

                                      105
<PAGE>

        (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 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 calculation of any original issue
discount using the Prepayment Assumption;

        (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.

                                      106
<PAGE>

        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 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 to the Holders of the Class L Certificate the Late Payment
Fees that are received, in the time or times and in the manner required by the
Code.

                                      107
<PAGE>

                                  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 with
respect to an Aggregate Loan Group upon the earlier of

        (a) the purchase by the Servicer of all Mortgage Loans (and REO
Properties) in such Aggregate Loan Group 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) in
        such Aggregate Loan Group 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 in such Aggregate Loan Group 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 such Aggregate Loan Group,
        in each case plus accrued and unpaid interest thereon at the applicable
        Adjusted Net Mortgage Rate and

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

        (b) the later of

                (i) the maturity or other liquidation (or any Advance with
        respect thereto) of the last Mortgage Loan in such Aggregate Loan Group
        and the disposition of all related 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 in an
Aggregate Loan Group pursuant to clause (a) above shall be conditioned upon the
aggregate Stated Principal Balance of those Mortgage Loans in such Aggregate
Loan Group, at the time of any such repurchase, aggregating less than ten
percent (10%) of the aggregate Stated Principal Balance of the Mortgage Loans in
such Aggregate Loan Group as of the Cut-off 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.

        The Grantor Trust with respect to the Late Payment Fees shall terminate
automatically upon termination of the Trust Fund.

                                      108
<PAGE>

        Section 9.02 Final Distribution on the Certificates.

        If on any Determination Date the Servicer determines that there are no
Outstanding Mortgage Loans in an Aggregate Loan Group and no other funds or
assets in the Trust Fund with respect to such Aggregate Loan Group other than
the funds in the Certificate Account, the Servicer shall direct the Trustee
promptly to send a final distribution notice to each Certificateholder of Group
I or Group II Certificates, as applicable. 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 an Aggregate Loan Group specifying the
Distribution Date on which the related Certificateholders may surrender their
Certificates for payment of the final distribution and cancellation shall be
given promptly by the Trustee by letter to the related 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 related
Certificates will be made upon presentation and surrender of such 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 such Certificates at the office therein specified.
The Servicer will give such notice to each Rating Agency at the time such notice
is given to such Certificateholders.

        If this notice is given, the Servicer shall cause all funds in the
Certificate Account with respect to such Aggregate Loan Group 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 Group I or Group II Certificates, as applicable. 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 in such Aggregate Loan Group.

        Upon presentation and surrender of the related Certificates, the Trustee
shall cause to be distributed to the Certificateholders of each related 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 (or on their Notional Amount, if applicable) in
the case of an interest-bearing Certificate and (ii) as to the Residual
Certificates, only if such termination is with respect to the last remaining
Aggregate Loan Group, 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 or Notional Amounts 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

                                      109
<PAGE>

applicable Certificates shall not have been surrendered for cancellation, the
Trustee may take appropriate 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, and only if such termination is with respect to the last
remaining Aggregate Loan Group, 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 in the last remaining Aggregate Loan Group 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.

                                      110
<PAGE>

                                  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 Securities and Exchange
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,

                                      111
<PAGE>

        (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 thereof 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.

        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 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.

                                      112
<PAGE>

        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 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

        5. The final distribution to Certificateholders.

        In addition, the Trustee shall promptly furnish to each Rating Agency
copies of the following:

                                      113
<PAGE>

        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
IN0708, Series 2007-H, or such other address as the Trustee may hereafter
furnish to the Depositor or Servicer and (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. 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 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.

                                      114
<PAGE>

        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
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 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.

        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.

                                      115
<PAGE>

        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 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

                                      116
<PAGE>

        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 Remittance Reports 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.

                (d) 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.

                                      117
<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 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

                                      118
<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

                                      119
<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.

                                      120
<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
        Subcontractors 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
        Subcontractors to deliver to the Trustee (with a copy to the Depositor)
        and the Servicer 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

                                      121
<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.

                                      122
<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.

                                   * * * * * *

                                      123
<PAGE>

        IN WITNESS WHEREOF, the Depositor, the 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

                                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 29 day of June 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 29 day of June 2007, before me, personally appeared Jennifer
Hermansader and Marion Hogan, known to me to be an Authorized Signer and an
Authorized Signer, 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/ Tiffany Yuan
                                    ------------------------------------
                                    Notary Public

[NOTARIAL SEAL]

                                       2

<PAGE>

STATE OF CALIFORNIA             )
                                :  ss.:
COUNTY OF Los Angeles           )

        On this 29 day of June 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-H

              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.

               (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

                                     S-II-1
<PAGE>

        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
        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-H

             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.

               (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 Exchange Act) by an entity that satisfied at the
        time of origination the requirements of Section 3(a)(41) of the Exchange
        Act.

               (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
        fixed-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) None of the Mortgage Loans as of the Cut-off Date are
        Cooperative Loans.

               (27) The aggregate PO Percentage of the Stated Principal Balances
        of the Discount Mortgage Loans in Loan Group 1 and Loan Group 2 does not
        exceed $361,394 and $192,684, respectively.

               (28) 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 federal, state and local
        predatory and abusive lending laws.

               (29) 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.

               (30) No Mortgage Loan is a "High-Cost Home Loan" as defined in
        the New Jersey Home Ownership Act effective November 27, 2003 (N.J.S.A.
        46:10B-22 et seq.).

               (31) No Mortgage Loan is a "High-Cost Home Loan" as defined in
        the New Mexico Home Loan Protection Act effective January 1, 2004 (N.M.
        Stat. Ann. ss.ss. 58-21A-1 et seq.).

               (32) 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.

               (33) 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 October 1, 2002
        through March 6, 2003 is governed by the Georgia Fair Lending Act
        (Exclusion Representation).

               (34) 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.

               (35) 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

                                    S-III-4
<PAGE>

               (36) No Mortgage Loan is a "High-Cost Home Mortgage Loan" as
        defined in the Massachusetts Predatory Home Loan Practices Act effective
        November 7, 2004 (Mass. Gen. Laws ch. 183C).

                                     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 (OTHER THAN 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 ("ERISA"), 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, UNTIL THIS CERTIFICATE HAS
BEEN THE SUBJECT OF AN ERISA-QUALIFYING UNDERWRITING, ANY PURPORTED TRANSFER OF
THIS CERTIFICATE 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.]

                                      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.
                 Residential Asset Securitization Trust 2007-A8
                Mortgage Pass-Through Certificates, Series 2007-H
                                   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"). 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>

        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.]

        [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 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.]

[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 ("ERISA"), OR
A PLAN SUBJECT TO SECTION 4975 OF THE CODE, OR AN

                                      B-1
<PAGE>

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 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.]

                                      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.
                 Residential Asset Securitization Trust 2007-A8
                Mortgage Pass-Through Certificates, Series 2007-H
                                   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"). 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.]

[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,
nor 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, 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 and 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.

                                      B-4
<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-5
<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 PURCHASER
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.
                 Residential Asset Securitization Trust 2007-A8
                Mortgage Pass-Through Certificates, Series 2007-H

                      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"). 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.

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

                                      C-2
<PAGE>

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, (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 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 and 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. Such representation shall be deemed to have been made to the
Trustee by the Transferee's acceptance of this Class A-R Certificate and by a
beneficial owner's acceptance of its interest in such Certificate.
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 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
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 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 2007-A8
                Mortgage Pass-Through Certificates, Series 2007-H
                                   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.

        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"). 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.

                                      D-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.]

        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.
                 Residential Asset Securitization Trust 2007-A8
                Mortgage Pass-Through Certificates, Series 2007-H

        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 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 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 ("ERISA"), OR A PLAN SUBJECT TO SECTION 4975 OF
THE CODE, OR, IF THE CERTIFICATE HAS BEEN THE SUBJECT OF AN ERISA-QUALIFYING
UNDERWRITING AND THE PURCHASER IS AN INSURANCE COMPANY, A REPRESENTATION IN
ACCORDANCE WITH THE AGREEMENT REFERRED TO HEREIN, 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.

                                      F-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.
                        Residential Asset Securitization Trust 2007-A8
                      Mortgage Pass-Through Certificates, Series 2007-H

                                     Class P

      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.

Distributions 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"). To the extent
not defined herein, the capitalized terms used herein have the meanings assigned
in the Agreement. This Certificate is issued

                                      F-2
<PAGE>

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 (x) transferee is not an employee 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 (y) if the 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 satisfy the
requirements for exemptive relief under Sections I and III of PTCE 95-60 or (ii)
in the case of a 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 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 expressly undertaken in this
Agreement or to any liability.

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-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-4
<PAGE>

                                INDYMAC MBS, INC.
                 Residential Asset Securitization Trust 2007-A8
                       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-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-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-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-8
<PAGE>
                                   Exhibit F-2

                          [FORM OF CLASS L CERTIFICATE]

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 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 ("ERISA"), OR A PLAN OR ARRANGEMENT SUBJECT TO
SECTION 4975 OF THE CODE, OR IF THE TRANSFEREE IS AN INSURANCE COMPANY AND THE
CERTIFICATES HAVE BEEN THE SUBJECT OF AN ERISA QUALIFYING UNDERWRITING, A
REPRESENTATION IN ACCORDANCE WITH THE PROVISIONS OF THE AGREEMENT REFERRED TO
HEREIN 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 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.

                                      F-9
<PAGE>

Certificate No.                       :

Cut-off Date                          :

First Distribution Date               :

Initial Notional Balance
of this Certificate
("Denomination")                      :     $

Initial Notional Balances
of all Certificates
of this Class                         :     $

CUSIP                                 :

ISIN                                  :

Interest Rate                         :     Not Applicable

Maturity Date                         :     Not Applicable

                                INDYMAC MBS, INC.
                        Residential Asset Securitization Trust 2007-A8
                      Mortgage Pass-Through Certificates, Series 2007-H

                                     Class L

      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 30-year conventional fixed-rate mortgage
      loans (the "Mortgage Loans") secured by first liens on one- to four-family
      residential properties.

Distributions 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

                                      F-10
<PAGE>

Deutsche Bank National Trust Company, as trustee (the "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.

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
Collection Account and 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
arrangement 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 (ii) if the
transferee is an insurance company and the Certificates have 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 a Certificate presented for registration
in the name of an employee benefit plan or arrangement 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
arrangement 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 and addressed to the Trustee and the Servicer, which Opinion of
Counsel shall not be an expense of the Trustee, the Servicer or the Trust Fund,
to the effect that the purchase and holding of such Certificate will not result
in a non-exempt 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 expressly undertaken in this Agreement or to any
liability. If no written representation or Opinion of Counsel as described above
is delivered to the Trustee, the representation in (i) or (ii) above, as
appropriate, shall be deemed to have been made to the Trustee by the
Transferee's acceptance of this Certificate and by a beneficial owner's
acceptance of its interest in such Certificate. 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 or arrangement subject to ERISA

                                      F-11
<PAGE>

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.

                                      F-12
<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-13
<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,
                  Mortgage Pass-Through Certificates, Series 2007-H

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, 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-I-1
<PAGE>

<PAGE>

                                DEUTSCHE BANK NATIONAL TRUST COMPANY,
                                   as Trustee

                                By:__________________________________________
                                       Name:
                                       Title:

                                     G-I-2
<PAGE>
                                   EXHIBIT G-2

              FORM OF DELAY DELIVERY CERTIFICATION (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,
             Mortgage Pass-Through Certificates, Series 2007-H

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 June 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;

        (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

                                     G-2-1
<PAGE>

        (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
(xi) 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, 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,
                Mortgage Pass-Through Certificates, Series 2007-H

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).

        (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 (i), (ii), (iii),
(iv), (vi) and (xi) 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.

                                      H-1
<PAGE>

        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, 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.
                       Mortgage Pass-Through Certificates
                                  Series 2007-H

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. 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 sales. The Transferee expressly agrees to be bound by and to abide by
the provisions of Section 5.02(c)

                                      I-1
<PAGE>

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
        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

                                      I-2
<PAGE>

               (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) which 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 Class A-R
Certificate, (iv) rural electric and telephone cooperatives described in Code
Section 1381(a)(2)(c), (v) a Person that is not a citizen or resident of the
United States, a corporation, partnership, or other entity created or organized
in or under the laws of the United States or any political subdivision thereof,
or an estate or trust whose income from sources without the United States is
includible in gross income for federal income tax purposes regardless of its
connection with the conduct of a trade or business within the United States, and
(vi) any other Person so designated by the Depositor based upon an Opinion of
Counsel that the Transfer of an Ownership Interest in a Class A-R Certificate to
such Person may cause the Trust Fund 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, 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 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.

                                      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

DB Services Tennessee
648 Grassmere Park Road
Nashville, TN 37211-3658
Attention: Transfer Unit, Series 200  -

               Re:    IndyMac MBS, Inc.
                      Mortgage Pass-Through Certificates, Series 2007-H, 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

DB Services Tennessee
648 Grassmere Park Road
Nashville, TN 37211-3658
Attention: Transfer Unit, Series 200  -

               Re:    IndyMac MBS, Inc.
                      Mortgage Pass-Through Certificates, Series 2007-H, 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) [if the Certificate 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, and (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 Act, (2) the purchaser or transferee of such Certificate has executed and
delivered to you a certificate to substantially

                                      K-1
<PAGE>

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.

                                          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

DB Services Tennessee
648 Grassmere Park Road
Nashville, TN 37211-3658
Attention: Transfer Unit, Series 200  -

               Re:    IndyMac MBS, Inc.
                      Mortgage Pass-Through Certificates, Series 2007-H, 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) [if the Certificate 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 completed either of
the forms of certification to that effect attached hereto as Annex 1 or Annex 2,
(g) we

                                      L-1
<PAGE>

are aware that the sale to us is being made in reliance on Rule 144A and
(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.

                                                   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

                                      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 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.
                       Mortgage Pass-Through Certificates
                                  Series 2007-H

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, 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 _______________.

( )     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
        ______________.

                                      M-1
<PAGE>

( )     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 June 1, 2007 among IndyMac
        Bank, F.S.B. as Servicer, Inc, IndyMac MBS, Inc. and Deutsche
        Bank National Trust Company, as 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.
               Residential Asset Securitization 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 Residential Asset Securitization 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]

                                      N-1
<PAGE>

                                   EXHIBIT O-2
                                   -----------

                     FORM OF 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 June 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, pursuant to which was created the
Residential Asset Securitization 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
Residential Asset Securitization 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 4.06 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-1
<PAGE>
                                    EXHIBIT P

                                   [Reserved]

                                      P-1
<PAGE>
                                    EXHIBIT Q
                                    ---------

                                    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 11.04. 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 "4.06 statement" are required to be
included in the periodic Distribution Date statement under Section 4.06,
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 4.06 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>

<S>     <C>   <C>                                                                              <C>
Form    Item  Description                                                                      Responsible Party
------- ----- -------------------------------------------------------------------------------- -----------------------------------
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, determination dates for          4.06 statement
              calculating distributions and actual distribution dates for the distribution
              period.
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              (2) Cash flows received and the sources thereof for distributions, fees and      4.06 statement
              expenses.
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              (3) Calculated amounts and distribution of the flow of funds for the period      4.06 statement
              itemized by type and priority of payment, including:
------- ----- -------------------------------------------------------------------------------- -----------------------------------
                          (i) Fees or expenses accrued and paid, with an identification of     4.06 statement
              the general purpose of such fees and the party receiving such fees or expenses.
------- ----- -------------------------------------------------------------------------------- -----------------------------------
                          (ii) Payments accrued or paid with respect to enhancement or other   4.06 statement
              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 distributions accrued and paid   4.06 statement
              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 excess spread and the         4.06 statement
              disposition of excess cash flow.
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              (4) Beginning and ending principal balances of the mortgage-backed securities.   4.06 statement
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              (5) Interest rates applicable to the pool assets and the mortgage-backed         4.06 statement
              securities, as applicable.

                                      Q-1
<PAGE>

<CAPTION>
<S>     <C>   <C>                                                                              <C>
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              (6) Beginning and ending balances of transaction accounts, such as reserve       4.06 statement
              accounts, and material account activity during the period.
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              (7) Any amounts drawn on any credit enhancement or other support identified in   4.06 statement
              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 beginning and ending of each         4.06 statement
              period, and updated pool composition information, such as weighted average
              coupon, weighted average life, weighted average remaining term, pool factors     Updated pool composition
              and prepayment amounts.                                                          information fields to be as
                                                                                               specified by Depositor from time
                                                                                               to time
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              (9) Delinquency and loss information for the period.                             4.06 statement.

              In addition, describe any material changes to the information specified in
              Item 1100(b)(5) of Regulation AB regarding the pool assets.                      Form 10-D report: Servicer
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              (10) Information on the amount, terms and general purpose of any advances made   4.06 statement
              or reimbursed during the period, including the general use of funds advanced
              and the general source of funds for reimbursements.
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              (11) Any material modifications, extensions or waivers to pool asset terms,      Form 10-D report: Servicer
              fees, penalties or payments during the distribution period or that have
              cumulatively become material over time.
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              (12) Material breaches of pool asset representations or warranties or            Form 10-D report: Trustee (based
              transaction covenants.                                                           on 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 tests used for determining any      4.06 statement
              early amortization, liquidation or other performance trigger and whether the
              trigger was met.
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              (14) Information regarding any new issuance of mortgage-backed securities        Form 10-D report: Depositor
              backed by the same asset pool,

              [information regarding] any pool asset changes (other than in connection with    Form 10-D report: Servicer
              a pool asset converting into cash in accordance with its terms),
------- ----- -------------------------------------------------------------------------------- -----------------------------------

                                      N-2
<PAGE>

<CAPTION>
<S>     <C>   <C>                                                                              <C>
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              such as additions or removals in connection with a pre-funding
              or revolving period and pool asset 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, acquisition or pool selection criteria or
              procedures, as applicable, used to originate, acquire or select the new pool
              assets.                                                                          Form 10-D report: Servicer
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              Item 1121(b) - Pre-Funding or Revolving Period Information                       N/A

              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 material servicers                               Servicer

              Originator of 20% or more of pool assets as of the Cut-off Date                  Seller

              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 backed by the same asset pool or are otherwise issued by the    Depositor
              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.
------- ----- -------------------------------------------------------------------------------- -----------------------------------

                                      N-3
<PAGE>

<CAPTION>
<S>     <C>   <C>                                                                              <C>
------- ----- -------------------------------------------------------------------------------- -----------------------------------
        4     Defaults Upon Senior Securities
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              Information from Item 3 of Part II of Form 10-Q:

              Report the occurrence of any Event of Default (after expiration of any grace
              period and provision of any required notice)                                     Trustee
------- ----- -------------------------------------------------------------------------------- -----------------------------------
        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 Information*                        N/A
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              *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 Information*             Depositor

              Determining applicable disclosure threshold

              Obtaining required financial information or effecting incorporation by
              reference
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              Item 1115(b) - Derivative Counterparty Financial Information*                    Depositor

              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 on Form 8-K during the period   The Responsible Party for the
              covered by the Form 10-D but not reported                                        applicable Form 8-K item as
                                                                                               indicated below
------- ----- -------------------------------------------------------------------------------- -----------------------------------
        9     Exhibits
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              Distribution report                                                              Trustee
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              Exhibits required by Item 601 of Regulation S-K, such as material agreements     Depositor
------- ----- -------------------------------------------------------------------------------- -----------------------------------

                                      N-4
<PAGE>

<CAPTION>
<S>     <C>   <C>                                                                              <C>
------- ----- -------------------------------------------------------------------------------- -----------------------------------
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
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              Disclosure is required regarding entry into or amendment of any definitive       Servicer; or any of the following
              agreement that is material to the securitization, even if depositor is not a     that is a party to the agreement
              party.                                                                           if Servicer is not: Trustee,
                                                                                               Sponsor, Depositor
              Examples: servicing agreement, custodial agreement.

              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  any definitive agreement that   Servicer; or any of the following
              is material to the securitization (other than expiration in accordance with      that is a party to the agreement
              its terms), even if depositor is not a party.                                    if Servicer is not: Trustee,
                                                                                               Sponsor, Depositor
              Examples: servicing agreement, custodial agreement.

------- ----- -------------------------------------------------------------------------------- -----------------------------------
        1.03  Bankruptcy or Receivership
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              Disclosure is required regarding the bankruptcy or receivership, if known to     Depositor
              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 trigger or other event, including    Servicer/Trustee (to the extent of
              event of default, that would materially alter the payment                        actual knowledge)
              priority/distribution of cash flows/amortization schedule.

              Disclosure will be made of events other than waterfall triggers which are
              disclosed in the 4.06 statement
------- ----- -------------------------------------------------------------------------------- -----------------------------------
        3.03  Material Modification to Rights of Security Holders
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              Disclosure is required of any material modification to documents defining the    Trustee
              rights of Certificateholders, including the Pooling and Servicing Agreement
------- ----- -------------------------------------------------------------------------------- -----------------------------------
        5.03  Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year
------- ----- -------------------------------------------------------------------------------- -----------------------------------

                                      N-5
<PAGE>

<CAPTION>
<S>     <C>   <C>                                                                              <C>
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              Disclosure is required of any amendment "to the governing documents of the       Depositor
              issuing entity"
------- ----- -------------------------------------------------------------------------------- -----------------------------------
        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 Section 3.18]                         Depositor
------- ----- -------------------------------------------------------------------------------- -----------------------------------
        6.02  Change of Servicer or Trustee
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              Requires disclosure of any removal, replacement, substitution or addition of     Trustee or Servicer
              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 other than by its terms, the     Depositor or Trustee
              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% or more at the time of         Depositor
              provide updated Reg AB disclosure about the actual asset pool.
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              If there are any new servicers or originators required to be disclosed under     Depositor
              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 not otherwise called for in      Depositor
              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 on Form 8-K during the fourth   The Responsible Party for the
              quarter covered by the Form 10-K but not reported                                applicable Form 8-K item as
                                                                                               indicated above
------- ----- -------------------------------------------------------------------------------- -----------------------------------
        15    Exhibits and Financial Statement Schedules
------- ----- -------------------------------------------------------------------------------- -----------------------------------

                                      N-6
<PAGE>

<CAPTION>
<S>     <C>   <C>                                                                              <C>
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              Item 1112(b) - Significant Obligor Financial Information                         Servicer
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              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 Information                     Depositor

              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 servicing 20% or more of pool
              assets at time of report, other material servicers                               Servicer

              Originator of 20% or more of pool assets as of the Cut-off Date                  Servicer

------- ----- -------------------------------------------------------------------------------- -----------------------------------
              Item 1119 - Affiliations and relationships between the following entities, or
              their respective affiliates, that are material to Certificateholders:

              Sponsor (Seller)

              Depositor                                                                        Seller

              Trustee                                                                          Depositor

              Servicer, affiliated Servicer, other Servicer servicing 20% or more of pool      Trustee (only as to affiliations
              assets at time of report, other                                                  between the Trustee and such
------- ----- -------------------------------------------------------------------------------- -----------------------------------

                                      N-7
<PAGE>

<CAPTION>
<S>     <C>   <C>                                                                              <C>
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              material servicers                                                               other parties listed)

              Originator                                                                       Servicer

              Credit Enhancer/Support Provider

              Significant Obligor                                                              Depositor

                                                                                               Depositor

                                                                                               Servicer
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              Item 1122 - Assessment of Compliance with Servicing Criteria                     Each Party participating in the
                                                                                               servicing function
------- ----- -------------------------------------------------------------------------------- -----------------------------------
              Item 1123 - Servicer Compliance Statement                                        Servicer
------- ------------------- -------------------------------------------------------------------------------- ---------------------
</TABLE>

                                      N-8
<PAGE>

<PAGE>

                                    EXHIBIT R

                        FORM OF PERFORMANCE CERTIFICATION
                                    (Trustee)

      Re:    The Pooling and Servicing Agreement dated as of June 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")

        I, ________________________________, the _______________________ of 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.

  -------------- --------------------------------- -------- ------- ----------
     Reg AB             Servicing Criteria
    Reference                                      Servicer Trustee   Notes
  -------------- --------------------------------- -------- ------- ----------
  1122(d)(1)(i)  Policies and procedures are          X       X
                 instituted 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            X       X
                 activities 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                               NA
                 transaction 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            Servicing Criteria         Primary   Trustee   Notes
  Reference                                     Servicer
-------------- -------------------------------- --------- -------- ---------
1122(d)(2)(i)  Payments on pool assets are         X         X
               deposited 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         X         X
               transfer on behalf of an
               obligor or to an investor are
                made only by authorized
               personnel.
-------------- -------------------------------- --------- -------- ---------
1122(d)(2)(iii)Advances of funds or                X
               guarantees 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           X         X
               maintained 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     X
               so as to prevent unauthorized
               access.
-------------- -------------------------------- --------- -------- ---------
1122(d)(2)(vii)Reconciliations are prepared        X         X
               on a 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            Servicing Criteria         Servicer Trustee    Notes
  Reference
--------------- -------------------------------- -------- -------- ----------
1122(d)(3)(i)   Reports to investors,               X        X
                including those 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        X        X
                allocated 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            X        X
                investor are 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   X         X
                the investor reports agree with
                cancelled checks, or other form of
                payment, or custodial bank
                statements.
--------------- -------------------------------- -------- -------- ----------

                                      S-3
<PAGE>

--------------- -------------------------------------- --------- -------- ------
    Reg AB               Servicing Criteria             Servicer Trustee  Notes
  Reference
--------------- -------------------------------------- --------- -------- ------
1122(d)(4)(i)   Collateral or security on pool             X        X
                assets is maintained as required by
                the transaction agreements or
                related pool asset documents.
--------------- -------------------------------------- --------- -------- ------
1122(d)(4)(ii)  Pool assets  and related documents         X        X
                are safeguarded as required by the
                transaction agreements.
--------------- -------------------------------------- --------- -------- ------
1122(d)(4)(iii) Any additions, removals or                 X        X
                substitutions to 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         X
                any 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       X
                pool 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       X
                status of 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        X
                (e.g., 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             X
                efforts are 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            X
                rates of return for pool
                assets with variable rates are
                computed based on the related
                pool asset documents.
--------------- -------------------------------------- --------- -------- ------

                                      S-4
<PAGE>

--------------- -------------------------------------- ---------- ------- ------
    Reg AB
  Reference              Servicing Criteria             Servicer  Trustee Notes
--------------- -------------------------------------- ---------- ------- ------
1122(d)(4)(x)   Regarding any funds held in trust          X
                for an 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              X
                obligor (such 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              X
                connection 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         X
                obligor 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             X
                uncollectible accounts are
                recognized and recorded in
                accordance with the transaction
                agreements.
--------------- -------------------------------------- ---------- ------- ------
1122(d)(4)(xv)  Any external enhancement or other      X (with       X
                support, identified in Item            respect
                1114(a)(1) through (3) or Item 1115    to a swap
                of Regulation AB, is maintained as     disclosure
                set forth in the transaction             event)
                agreements.
--------------- -------------------------------------- ---------- ------- ------

                                      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

        Re:    Residential Asset Securitization Trust 2007-A8
               ----------------------------------------------

        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 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:  _________________________

                                      S-2

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00126-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00126-of-00352.parquet"}]]