Document:

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                                                                    EXHIBIT 10.5

                       DIRECTOR INDEMNIFICATION AGREEMENT

This Agreement is made as of the 20th day of August 2001, by and between Engage,
Inc., a Delaware corporation (the "Corporation), and ___________ ("Indemnitee"),
a director of the Corporation.

WHEREAS, it is essential to the Corporation to retain and attract as directors
the most capable persons available, and

WHEREAS, it is the express policy of the Corporation to indemnify its directors
so as to provide them with the maximum possible protection permitted by law, and

WHEREAS, Indemnitee does not regard the protection available under the
Corporation's Certificate of Incorporation and insurance as adequate in the
present circumstances, and may not be willing to serve or remain as a director
without adequate protection, and

WHEREAS, the Corporation desires Indemnitee to serve, or continue to serve, as a
director of the Corporation.

         NOW THEREFORE, the Corporation and Indemnitee do hereby agree as
follows:

         1.       AGREEMENT TO SERVE. Indemnitee agrees to serve or continue to
serve as a director of the Corporation for so long as he is duly elected or
appointed or until such time as he tenders his resignation in writing.

         2.       DEFINITIONS. As used in this Agreement:

                  (a) The term "Proceeding" shall include any threatened,
pending or completed action, suit, or proceeding, whether brought by or in the
right of the Corporation or otherwise and whether of a civil, criminal,
administrative or investigative nature, and any appeal therefrom.

                  (b) The term "Corporate Status" shall mean the status of a
person who is or was a director of the Corporation, or is or was serving, or has
agreed to serve, at the request of the Corporation, as a director, officer,
partner, trustee, employee or agent of another corporation, partnership, joint
venture, trust or other enterprise.

                  (c) The term "Expenses" shall include, without limitation,
attorneys' fees, retainers, court costs, transcript costs, fees of experts,
travel expenses, duplicating costs, printing and binding costs, telephone
charges, postage, delivery service fees and other disbursements or expenses of
the types customarily incurred in connection with investigations, judicial or
administrative proceedings or appeals, but shall not include the amount of
judgments, fines or penalties against Indemnitee or amounts paid in settlement
in connection with such matters.

                  (d) References to "other enterprise" shall include employee
benefit plans; references to "fines" shall include any excise tax assessed with
respect to any employee benefit

<PAGE>

plan; references to "serving at the request of the Corporation" shall include
any service as a director, officer, employee or agent of the Corporation which
imposes duties on, or involves services by, such director, officer, employee, or
agent with respect to an employee benefit plan, its participants, or
beneficiaries; and a person who acted in good faith and in a manner he
reasonably believed to be in the interests of the participants and beneficiaries
of an employee benefit plan shall be deemed to have acted in a manner "not
opposed to the best interests of the Corporation" as referred to in this
Agreement.

         3.       INDEMNIFICATION IN THIRD-PARTY PROCEEDINGS. The Corporation
shall indemnify Indemnitee in accordance with the provisions of this Paragraph 3
if Indemnitee was or is a party to or threatened to be made a party to or
otherwise involved in any Proceeding (other than a Proceeding by or in the right
of the Corporation to procure a judgment in its favor) by reason of his
Corporate Status or by reason of any action alleged to have been taken or
omitted in connection therewith, against all Expenses, judgments, fines,
penalties and amounts paid in settlement actually and reasonably incurred by
Indemnitee or on his behalf in connection with such Proceeding, if Indemnitee
acted in good faith and in a manner which he reasonably believed to be in, or
not opposed to, the best interests of the Corporation and, with respect to any
criminal Proceeding, had no reasonable cause to believe that his conduct was
unlawful. The termination of any Proceeding by judgment, order, settlement,
conviction or upon a plea of NOLO CONTENDERE, or its equivalent, shall not, of
itself, create a presumption that Indemnitee did not act in good faith and in a
manner which he reasonably believed to be in, or not opposed to, the best
interests of the Corporation, and, with respect to any criminal Proceeding, had
reasonable cause to believe that his conduct was unlawful.

         4.       INDEMNIFICATION IN PROCEEDINGS BY OR IN THE RIGHT OF THE
CORPORATION. The Corporation shall indemnify Indemnitee in accordance with the
provisions of this Paragraph 4 if Indemnitee is a party to or threatened to be
made a party to or otherwise involved in any Proceeding by or in the right of
the Corporation to procure a judgment in its favor by reason of his Corporate
Status or by reason of any action alleged to have been taken or omitted in
connection therewith, against all Expenses and, to the extent permitted by law,
amounts paid in settlement actually and reasonably incurred by Indemnitee or on
his behalf in connection with such Proceeding, if he acted in good faith and in
a manner which he reasonably believed to be in, or not opposed to, the best
interests of the Corporation, except that no indemnification shall be made under
this Paragraph 4 in respect of any claim, issue, or matter as to which
Indemnitee shall have been adjudged to be liable to the Corporation, unless and
only to the extent that the Court of Chancery of Delaware shall determine upon
application that, despite the adjudication of such liability but in view of all
the circumstances of the case, Indemnitee is fairly and reasonably entitled to
indemnity for such Expenses as the Court of Chancery shall deem proper.

         5.       EXCEPTIONS TO RIGHT OF INDEMNIFICATION. Notwithstanding
anything to the contrary in this Agreement, except as set forth in Paragraph 10,
the Corporation shall not indemnify the Indemnitee in connection with a
Proceeding (or part thereof) initiated by the Indemnitee unless the initiation
thereof was approved by the Board of Directors of the Corporation.
Notwithstanding anything to the contrary in this Agreement, the Corporation
shall not indemnify the Indemnitee to the extent the Indemnitee is reimbursed
from the proceeds of insurance, and in the event the Corporation makes any
indemnification payments to the Indemnitee and the Indemnitee is subsequently
reimbursed from the proceeds of insurance, the Indemnitee shall promptly refund
such indemnification payments to the Corporation to the extent of such insurance
reimbursement.

                                      -2-

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         6.       INDEMNIFICATION OF EXPENSES OF SUCCESSFUL PARTY.
Notwithstanding any other provision of this Agreement, to the extent that
Indemnitee has been successful, on the merits or otherwise, in defense of any
Proceeding or in defense of any claim, issue or matter therein, Indemnitee shall
be indemnified against all Expenses incurred by him or on his behalf in
connection therewith. Without limiting the foregoing, if any Proceeding or any
claim, issue or matter therein is disposed of, on the merits or otherwise
(including a disposition without prejudice), without (i) the disposition being
adverse to the Indemnitee, (ii) an adjudication that the Indemnitee was liable
to the Corporation, (iii) a plea of guilty or NOLO CONTENDERE by the Indemnitee,
(iv) an adjudication that the Indemnitee did not act in good faith and in a
manner he reasonably believed to be in or not opposed to the best interests of
the Corporation, and (v) with respect to any criminal proceeding, an
adjudication that the Indemnitee had reasonable cause to believe his conduct was
unlawful, the Indemnitee shall be considered for the purposes hereof to have
been wholly successful with respect thereto.

         7.       NOTIFICATION AND DEFENSE OF CLAIM. The Indemnitee shall notify
the Corporation in writing as soon as practicable of any Proceeding for which
indemnity will or could be sought by him and provide the Corporation with a copy
of any summons, citation, subpoena, complaint, indictment, information or other
document relating to such Proceeding with which he is served; provided that a
failure to provide such notice shall not, in any way, limit the Indemnitee's
rights under this Agreement. With respect to any Proceeding of which the
Corporation is so notified, the Corporation will be entitled to participate
therein at its own expense and/or to assume the defense thereof at its own
expense, with legal counsel reasonably acceptable to the Indemnitee. After
notice from the Corporation to the Indemnitee of its election so to assume such
defense, the Corporation shall not be liable to the Indemnitee for any legal or
other expenses subsequently incurred by the Indemnitee in connection with such
claim, other than as provided below in this Paragraph 7. The Indemnitee shall
have the right to employ his own counsel in connection with such claim, but the
fees and expenses of such counsel incurred after notice from the Corporation of
its assumption of the defense thereof shall be at the expense of the Indemnitee
unless (i) the employment of counsel by the Indemnitee has been authorized by
the Corporation, (ii) counsel to the Indemnitee shall have reasonably concluded
that there may be a conflict of interest or position on any significant issue
between the Corporation and the Indemnitee in the conduct of the defense of such
action or (iii) the Corporation shall not in fact have employed counsel to
assume the defense of such action, in each of which cases the fees and expenses
of counsel for the Indemnitee shall be at the expense of the Corporation, except
as otherwise expressly provided by this Agreement. The Corporation shall not be
entitled, without the consent of the Indemnitee, to assume the defense of any
claim brought by or in the right of the Corporation or as to which counsel for
the Indemnitee shall have reasonably made the conclusion provided for in clause
(ii) above. The Corporation shall not be required to indemnify the Indemnitee
under this Agreement for any amounts paid in settlement of any Proceeding
effected without its written consent. The Corporation shall not settle any
Proceeding in any manner which would impose any penalty or limitation on
Indemnitee without Indemnitee's written consent. Neither the Corporation nor the
Indemnitee will unreasonably withhold their consent to any proposed settlement.
If the Indemnitee is required to testify (in a court proceeding, deposition,
informal interview or otherwise), consult with counsel, furnish documents or
take any other action, by

                                      -3-

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reason of the Indemnitee's present or former Corporate Status, in connection
with any Proceeding, whether or not the Indemnitee was or is a party to or
threatened to be made a party to such Proceeding, the Corporation shall pay the
Indemnitee a fee at a per diem rate of $750 (to be prorated in the event of any
partial day), and shall reimburse the Indemnitee for all Expenses; provided that
the Corporation shall not have any obligation under this sentence to pay such
fee or reimburse any such Expense in connection with any Proceeding to the
extent this Agreement expressly entitles the Corporation not to indemnify
Indemnitee for Expenses incurred in that Proceeding.

         8.       ADVANCEMENT OF EXPENSES. Any Expenses incurred by the
Indemnitee in connection with any such Proceeding to which the Indemnitee was or
is a party or is threatened to be a party by reason of his Corporate Status or
by reason of any action alleged to have been taken or omitted in connection
therewith shall be paid by the Corporation in advance of the final disposition
of such matter; PROVIDED, HOWEVER, that the payment of such Expenses incurred by
the Indemnitee in advance of the final disposition of such matter shall be made
only upon receipt of an undertaking by or on behalf of the Indemnitee to repay
all amounts so advanced in the event that it shall ultimately be determined that
the Indemnitee is not entitled to be indemnified by the Corporation as
authorized in this Agreement. No security shall be required for such an
undertaking, and such undertaking will be accepted without reference to the
Indemnitee's financial ability to make repayment. Such Expenses shall be paid
immediately upon the written request of the Indemnitee to the Corporation.

         9.       PROCEDURE FOR INDEMNIFICATION. In order to obtain
indemnification pursuant to Paragraphs 3, 4 or 6 of this Agreement, Indemnitee
shall submit to the Corporation a written request, including in such request
such documentation and information as is reasonably available to Indemnitee and
is reasonably necessary to determine whether and to what extent Indemnitee is
entitled to indemnification or advancement of Expenses. Any such indemnification
shall be made promptly, and in any event within 60 days after receipt by the
Corporation of the written request of the Indemnitee, unless with respect to
requests under Paragraphs 3 or 4 the Corporation determines within such 60-day
period that such Indemnitee did not meet the applicable standard of conduct set
forth in Paragraph 3 or 4, as the case may be. Such determination, and any
determination pursuant to Section 8 that advanced Expenses must be repaid to the
Corporation, shall be made in each instance (a) by a majority vote of the
directors of the Corporation consisting of persons who are not at that time
parties to the Proceeding ("disinterested directors"), whether or not a quorum,
(b) by a committee of disinterested directors designated by majority vote of
disinterested directors, whether or not a quorum, (c) if there are no
disinterested directors, or if disinterested directors so direct, by independent
legal counsel (who may, to the extent permitted by applicable law, be regular
legal counsel to the Corporation) in a written opinion, or (d) by the
stockholders.

         10.      REMEDIES. The right to indemnification and immediate
advancement of Expenses as provided by this Agreement shall be enforceable by
the Indemnitee in any court of competent jurisdiction. Unless otherwise required
by law, the burden of proving that indemnification is not appropriate shall be
on the Corporation. Neither the failure of the Corporation to have made a
determination prior to the commencement of such action that indemnification is
proper in the circumstances because Indemnitee has met the applicable standard
of conduct, nor an actual determination by the Corporation pursuant to Paragraph
9 that Indemnitee has not met such

                                      -4-

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applicable standard of conduct, shall be a defense to the action or create a
presumption that Indemnitee has not met the applicable standard of conduct.
Indemnitee's expenses (of the type described in the definition of "Expenses" in
Paragraph 2(c)) reasonably incurred in connection with successfully establishing
his right to indemnification, in whole or in part, in any such Proceeding shall
also be indemnified by the Corporation.

         11.      PARTIAL INDEMNIFICATION. If Indemnitee is entitled under any
provision of this Agreement to indemnification by the Corporation for some or a
portion of the Expenses, judgments, fines, penalties or amounts paid in
settlement actually and reasonably incurred by him or on his behalf in
connection with any Proceeding but not, however, for the total amount thereof,
the Corporation shall nevertheless indemnify Indemnitee for the portion of such
Expenses, judgments, fines, penalties or amounts paid in settlement to which
Indemnitee is entitled.

         12.      SUBROGATION. In the event of any payment under this Agreement,
the Corporation shall be subrogated to the extent of such payment to all of the
rights of recovery of Indemnitee, who shall execute all papers required and take
all action necessary to secure such rights, including execution of such
documents as are necessary to enable the Corporation to bring suit to enforce
such rights.

         13.      TERM OF AGREEMENT. This Agreement shall continue until and
terminate upon the later of (a) six years after the date that Indemnitee shall
have ceased to serve as a director of the Corporation or, at the request of the
Corporation, as a director, officer, employee or agent of another corporation,
partnership, joint venture, trust or other enterprise or (b) the final
termination of all Proceedings pending on the date set forth in clause (a) in
respect of which Indemnitee is granted rights of indemnification or advancement
of Expenses hereunder and of any proceeding commenced by Indemnitee pursuant to
Paragraph 10 of this Agreement relating thereto.

         14.      INDEMNIFICATION HEREUNDER NOT EXCLUSIVE. The indemnification
and advancement of Expenses provided by this Agreement shall not be deemed
exclusive of any other rights to which Indemnitee may be entitled under the
Certification of Incorporation, the By-Laws, any agreement, any vote of
stockholders or disinterested directors, the General Corporation Law of
Delaware, any other law (common or statutory), or otherwise, both as to action
in his official capacity and as to action in another capacity while holding
office for the Corporation. Nothing contained in this Agreement shall be deemed
to prohibit the Corporation from purchasing and maintaining insurance, at its
expense, to protect itself or the Indemnitee against any expense, liability or
loss incurred by it or him in any such capacity, or arising out of his status as
such, whether or not the Indemnitee would be indemnified against such expense,
liability or loss under this Agreement; provided that the Corporation shall not
be liable under this Agreement to make any payment of amounts otherwise
indemnifiable hereunder if and to the extent that Indemnitee has otherwise
actually received such payment under any insurance policy, contract, agreement
or otherwise.

         15.      NO SPECIAL RIGHTS. Nothing herein shall confer upon Indemnitee
any right to continue to serve as a director of the Corporation for any period
of time or at any particular rate of compensation.

                                      -5-

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         16.      SAVINGS CLAUSE. If this Agreement or any portion thereof shall
be invalidated on any ground by any court of competent jurisdiction, then the
Corporation shall nevertheless indemnify Indemnitee as to Expenses, judgments,
fines, penalties and amounts paid in settlement with respect to any Proceeding
to the full extent permitted by any applicable portion of this Agreement that
shall not have been invalidated and to the fullest extent permitted by
applicable law.

         17.      COUNTERPARTS. This Agreement may be executed in any number of
counterparts, each of which shall constitute the original.

         18.      SUCCESSORS AND ASSIGNS. This Agreement shall be binding upon
the Corporation and its successors and assigns and shall inure to the benefit of
the estate, heirs, executors, administrators and personal representatives of
Indemnitee.

         19.      HEADINGS. The headings of the paragraphs of this Agreement are
inserted for convenience only and shall not be deemed to constitute part of this
Agreement or to affect the construction thereof.

         20.      MODIFICATION AND WAIVER. This Agreement may be amended from
time to time to reflect changes in Delaware law or for other reasons. No
supplement, modification or amendment of this Agreement shall be binding unless
executed in writing by both of the parties hereto. No waiver of any of the
provisions of this Agreement shall be deemed or shall constitute a waiver of any
other provision hereof nor shall any such waiver constitute a continuing waiver.

         21.      NOTICES. All notices, requests, demands and other
communications hereunder shall be in writing and shall be deemed to have been
given (i) when delivered by hand or (ii) if mailed by certified or registered
mail with postage prepaid, on the third day after the date on which it is so
mailed:

                  (a)      if to the Indemnitee, to:

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

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

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

                  (b)      if to the Corporation, to:

                           Engage, Inc.
                           100 Brickstone Square
                           Andover, Massachusetts  01810
                           Attn:  General Counsel

or to such other address as may have been furnished to Indemnitee by the
Corporation or to the Corporation by Indemnitee, as the case may be.

         22.      APPLICABLE LAW. This Agreement shall be governed by and
construed in accordance with the laws of the State of Delaware.

                                      -6-

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         23.      ENFORCEMENT. The Corporation expressly confirms and agrees
that it has entered into this Agreement in order to induce Indemnitee to
continue to serve as a director of the Corporation, and acknowledges that
Indemnitee is relying upon this Agreement in continuing in such capacity.

IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly
executed as of the day and year first above written.

                                      ENGAGE, INC.

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

                                      INDEMNITEE:

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

                                      -7-<PAGE>

                                                                       EXECUTION

             STRUCTURED ASSET SECURITIES CORPORATION, as Depositor,

                 AURORA LOAN SERVICES INC., as Master Servicer,

                                       and

                        WELLS FARGO BANK MINNESOTA, N.A.,
                                   as Trustee

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

                                 TRUST AGREEMENT

                          Dated as of November 1, 2001

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

                     STRUCTURED ASSET SECURITIES CORPORATION
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                 SERIES 2001-17

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                                                  TABLE OF CONTENTS

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Article I DEFINITIONS............................................................................................10

         Section 1.01. Definitions...............................................................................10
         Section 1.02. Calculations Respecting Mortgage Loans....................................................48

Article II DECLARATION OF TRUST; ISSUANCE OF CERTIFICATES........................................................48

         Section 2.01. Creation and Declaration of Trust Fund; Conveyance of Mortgage Loans......................48
         Section 2.02. Acceptance of Trust Fund by Trustee: Review of Documentation for Trust Fund...............52
         Section 2.03. Representations and Warranties of the Depositor...........................................53
         Section 2.04. Discovery of Breach.......................................................................55
         Section 2.05. Repurchase, Purchase or Substitution of Mortgage Loans....................................55
         Section 2.06. Grant Clause..............................................................................57

Article III THE CERTIFICATES.....................................................................................58

         Section 3.01. The Certificates..........................................................................58
         Section 3.02. Registration..............................................................................59
         Section 3.03. Transfer and Exchange of Certificates.....................................................59
         Section 3.04. Cancellation of Certificates..............................................................65
         Section 3.05. Replacement of Certificates...............................................................65
         Section 3.06. Persons Deemed Owners.....................................................................65
         Section 3.07. Temporary Certificates....................................................................66
         Section 3.08. Appointment of Paying Agent...............................................................66
         Section 3.09. Book-Entry Certificates...................................................................66

Article IV ADMINISTRATION OF THE TRUST FUND......................................................................68

         Section 4.01. Collection Account........................................................................68
         Section 4.02. Application of Funds in the Collection Account............................................69
         Section 4.03. Reports to Certificateholders.............................................................71
         Section 4.04. Certificate Account.......................................................................74
         Section 4.05. Determination of LIBOR....................................................................75
         Section 4.06. The Class A4 Reserve Fund.................................................................77

Article V DISTRIBUTIONS TO HOLDERS OF CERTIFICATES...............................................................77

         Section 5.01. Distributions Generally...................................................................77
         Section 5.02. Distributions from the Certificate Account................................................78
         Section 5.03. Allocation of Realized Losses.............................................................87
         Section 5.04. Advances by Master Servicer and the Trustee...............................................89
         Section 5.05. Compensating Interest Payments............................................................90
         Section 5.06. Distributions of Principal on Redemption Certificates.....................................90
</TABLE>

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         Section 5.07. The Class A4 Certificate Insurance Policy.................................................95

Article VI CONCERNING THE TRUSTEE; EVENTS OF DEFAULT.............................................................98

         Section 6.01. Duties of Trustee.........................................................................98
         Section 6.02. Certain Matters Affecting the Trustee....................................................100
         Section 6.03. Trustee Not Liable for Certificates......................................................101
         Section 6.04. Trustee May Own Certificates.............................................................101
         Section 6.05. Eligibility Requirements for Trustee.....................................................101
         Section 6.06. Resignation and Removal of Trustee.......................................................102
         Section 6.07. Successor Trustee........................................................................103
         Section 6.08. Merger or Consolidation of Trustee.......................................................103
         Section 6.09. Appointment of Co-Trustee, Separate Trustee or Custodian.................................103
         Section 6.10. Authenticating Agents....................................................................105
         Section 6.11. Indemnification of Trustee...............................................................106
         Section 6.12. Compensation of the Trustee..............................................................106
         Section 6.13. Collection of Monies.....................................................................107
         Section 6.14. Events of Default; Trustee To Act; Appointment of Successor..............................107
         Section 6.15. Additional Remedies of Trustee Upon Event of Default.....................................111
         Section 6.16. Waiver of Defaults.......................................................................111
         Section 6.17. Notification to Holders..................................................................111
         Section 6.18. Directions by Certificateholders and Duties of Trustee During Event of Default...........111
         Section 6.19. Action Upon Certain Failures of the Master Servicer and Upon Event of Default............112
         Section 6.20. Preparation of Tax Returns and Other Reports.............................................112

Article VII PURCHASE AND TERMINATION OF THE TRUST FUND..........................................................113

         Section 7.01. Termination of Trust Fund Upon Repurchase or Liquidation of All Mortgage Loans...........113
         Section 7.02. Procedure Upon Termination of Trust Fund.................................................114
         Section 7.03. Additional Trust Fund Termination Requirements...........................................115

Article VIII RIGHTS OF CERTIFICATEHOLDERS.......................................................................115

         Section 8.01. Limitation on Rights of Holders..........................................................115
         Section 8.02. Access to List of Holders................................................................116
         Section 8.03. Acts of Holders of Certificates..........................................................117

Article IX ADMINISTRATION AND SERVICING OF MORTGAGE LOANS BY THE MASTER SERVICER................................117

         Section 9.01. Duties of the Master Servicer............................................................117
         Section 9.02. Master Servicer Fidelity Bond and Master Servicer Errors and Omissions Insurance Policy..118
         Section 9.03. Master Servicer's Financial Statements and Related Information...........................118
         Section 9.04. Power to Act; Procedures.................................................................119
</TABLE>

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<S>                                                                                                           <C>
         Section 9.05. Servicing Agreements Between the Master Servicer and Servicers; Enforcement of
                            Servicers'Obligations...............................................................120
         Section 9.06. Collection of Taxes, Assessments and Similar Items.......................................121
         Section 9.07. Termination of Servicing Agreements; Successor Servicers.................................122
         Section 9.08. Master Servicer Liable for Enforcement...................................................122
         Section 9.09. No Contractual Relationship Between Servicers and Trustee or Depositor...................122
         Section 9.10. Assumption of Servicing Agreement by Trustee.............................................122
         Section 9.11. "Due-on-Sale"Clauses; Assumption Agreements..............................................123
         Section 9.12. Release of Mortgage Files................................................................123
         Section 9.13. Documents, Records and Funds in Possession of Master Servicer To Be Held for Trustee.....124
         Section 9.14. Representations and Warranties of the Master Servicer....................................126
         Section 9.15. Closing Certificate and Opinion..........................................................128
         Section 9.16. Standard Hazard and Flood Insurance Policies.............................................128
         Section 9.17. Presentment of Claims and Collection of Proceeds.........................................129
         Section 9.18. Maintenance of the Primary Mortgage Insurance Policies...................................129
         Section 9.19. Trustee To Retain Possession of Certain Insurance Policies and Documents.................129
         Section 9.20. Realization Upon Defaulted Mortgage Loans................................................130
         Section 9.21. Compensation to the Master Servicer......................................................130
         Section 9.22. REO Property.............................................................................131
         Section 9.23. [Omitted]................................................................................131
         Section 9.24. Reports to the Trustee...................................................................131
         Section 9.25. Annual Officer's Certificate as to Compliance............................................132
         Section 9.26. Annual Independent Accountants'Servicing Report..........................................133
         Section 9.27. Merger or Consolidation..................................................................133
         Section 9.28. Resignation of Master Servicer...........................................................133
         Section 9.29. Assignment or Delegation of Duties by the Master Servicer................................134
         Section 9.30. Limitation on Liability of the Master Servicer and Others................................134
         Section 9.31. Indemnification; Third-Party Claims......................................................135

Article X REMIC ADMINISTRATION..................................................................................135

         Section 10.01. REMIC Administration....................................................................135
         Section 10.02. Prohibited Transactions and Activities..................................................137
         Section 10.03. Indemnification with Respect to Certain Taxes and Loss of REMIC Status..................137
         Section 10.04. REO Property............................................................................138

Article XI MISCELLANEOUS PROVISIONS.............................................................................139

         Section 11.01. Binding Nature of Agreement; Assignment.................................................139
         Section 11.02. Entire Agreement........................................................................139
         Section 11.03. Amendment...............................................................................139
         Section 11.04. Voting Rights...........................................................................140
         Section 11.05. Provision of Information................................................................140
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                                                    iv
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         Section 11.06. Governing Law...........................................................................141
         Section 11.07. Notices.................................................................................141
         Section 11.08. Severability of Provisions..............................................................142
         Section 11.09. Indulgences; No Waivers.................................................................142
         Section 11.10. Headings Not To Affect Interpretation...................................................142
         Section 11.11. Benefits of Agreement...................................................................142
         Section 11.12. Special Notices to the Rating Agencies..................................................142
         Section 11.13. Counterparts............................................................................143
         Section 11.14. Transfer of Servicing...................................................................143
         Section 11.15. Matters Relating to the Class A4 Certificate Insurance Policy...........................145
</TABLE>

                                   ATTACHMENTS

Exhibit A         Forms of Certificates
Exhibit B-1       Form of Trustee Initial Certification
Exhibit B-2       Form of Trustee Interim Certification
Exhibit B-3       Form of Final Certification
Exhibit B-4       Form of Endorsement
Exhibit C         Request for Release of Documents and Receipt
Exhibit D-l       Form of Residual Certificate Transfer Affidavit (Transferee)
Exhibit D-2       Form of Residual Certificate Transfer Affidavit (Transferor)
Exhibit E         Servicing Agreements
Exhibit F         Form of Rule 144A Transfer Certificate
Exhibit G         Form of Purchaser's Letter for Institutional Accredited
                  Investors
Exhibit H         Form of ERISA Transfer Affidavit
Exhibit I         Monthly Remittance Advice
Exhibit J         Monthly Electronic Data Transmission
Exhibit K         Custodial Agreements
Exhibit L         Insurance Agreement
Exhibit M         Class A4 Certificate Insurance Policy
Exhibit N-1       Form of Transfer Certificate for Transfer from Restricted
                  Global Security to Regulation S Global Security pursuant to
                  Section 3.03(h)(B)
Exhibit N-2       Form of Transfer Certificate for Transfer from Regulation S
                  Global Security to Restricted Global Securities pursuant to
                  Section 3.03(h)(C)
Exhibit O         Senior Principal Priorities
Exhibit P         Scheduled Balances Table

Mortgage Loan Schedules
-----------------------
Schedule A        All Mortgage Loans (by Mortgage Pool)
Schedule B-1      Mortgage Loans with Retained Interest

                                        v
<PAGE>

     This TRUST AGREEMENT, dated as of November 1, 2001 (the "Agreement"), is by
and among STRUCTURED ASSET SECURITIES CORPORATION, a Delaware corporation, as
depositor (the "Depositor"), AURORA LOAN SERVICES INC., as master servicer (the
"Master Servicer"), and WELLS FARGO BANK MINNESOTA, N.A., a national banking
association, as trustee (the "Trustee").

                              PRELIMINARY STATEMENT

     The Depositor has acquired the Mortgage Loans from Lehman Capital, A
Division of Lehman Brothers Holdings Inc. and Lehman Brothers Bank, FSB (each, a
"Seller") and at the Closing Date is the owner of the Mortgage Loans and the
other property being conveyed by it to the Trustee for inclusion in the Trust
Fund. On the Closing Date, the Depositor will acquire the Certificates from the
Trust Fund, as consideration for its transfer to the Trust Fund of the Mortgage
Loans and the other property constituting the Trust Fund. The Depositor has duly
authorized the execution and delivery of this Agreement to provide for the
conveyance to the Trustee of the Mortgage Loans and the other property
constituting the Trust Fund. All covenants and agreements made by the Depositor,
the Master Servicer and the Trustee herein with respect to the Mortgage Loans
and the other property constituting the Trust Fund are for the benefit of the
Holders from time to time of the Certificates and the Certificate Insurer. The
Depositor and the Master Servicer are entering into this Agreement, and the
Trustee is accepting the Trust Fund created hereby, for good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged.

     As provided herein, the Trustee shall elect that the Trust Fund be treated
for federal income tax purposes as comprising two real estate mortgage
investment conduits (each a "REMIC" or, in the alternative, the Lower Tier REMIC
and the Upper Tier REMIC, respectively). Each Certificate, other than the Class
E, Class P and Class R Certificates, represents ownership of one or more regular
interests in the Upper Tier REMIC for purposes of the REMIC Provisions. The
Class R Certificate represents ownership of the sole class of residual interest
in the Lower Tier REMIC and the Upper Tier REMIC for purposes of the REMIC
Provisions. The Class P and Class E Certificates will represent interests in the
Trust Fund but are not interests in any REMIC created hereunder. The Upper Tier
REMIC shall hold as assets the several classes of uncertificated Lower Tier
Interests, other than the Class LT-R Interest, set out below. Each such Lower
Tier Interest, other than the Class LT-R Interest, is hereby designated as a
regular interest in the Lower Tier REMIC. The Lower Tier REMIC shall hold as
assets all property of the Trust Fund other than the Lower Tier Interests, the
Class A4 Reserve Fund, the Rounding Account, the right to Prepayment Penalty
Amounts, and the Class E Distributable Amount, which is beneficially owned by
the holder of the Class E Certificate.

LOWER TIER REMIC

     The following table specifies the Class designation, interest rate, and
principal amount for each class of Lower Tier Interests.

<PAGE>

<TABLE>
<CAPTION>
         Lower Tier                   Lower Tier          Initial Class Principal        Corresponding Class of
     Class Designation              Interest Rate                Amount               Certificates or Components
     -----------------              -------------                ------               --------------------------
<S>                                 <C>                 <C>                           <C>
LT1-A1                                  6.60%             $   68,725,000.00                 Class 1-A1
LT1-A2                                  8.50%             $   19,850,000.00                 Class 1-A2
(1)                                                                                         Class 1-A3
LT1-A4                                  6.80%             $   20,992,000.00                 Class A4(1)
(2)                                                                                         Class 1-A6
LT1-A5                                  6.60%             $  100,000,000.00                 Class 1-A5
LT1-AP                                  0.00%             $      608,967.00                 Class 1-AP
LT1-AX                                   (3)                       (3)                      Class 1-AX
LT1-B                                   6.80%             $   12,232,547.80                 Classes B1-B6
LT2-A1                                  6.50%             $   50,000,000.00                 Class 2-A1
(4)                                                                                         Class 2-A3
(5)                                                                                         Class 2-A5(2)
LT2-A2(1)                               6.50%             $   36,800,000.00                 Class 2-A2
(6)                                                                                         Class 2-A3
(7)                                                                                         Class 2-A5(2)
LT2-A2(2)                               6.50%             $   24,360,000.00                 Class 2-A2
(8)                                                                                         Class 2-A6
(9)                                                                                         Class 2-A5(3)
LT2-A5(1)                               6.50%             $   14,711,000.00                 Class 2-A5(1)
LT2-A5(5)                               6.50%             $   55,100,000.00                 Class 2-A5(5)
LT2-A5(6)                               0.00%             $      174,386.00                 Class 2-A5(6)
LT2-A5(7)                               (10)                      (10)                      Class 2-A5(7)
LT2-A7                                  6.50%             $   15,000,000.00                 Class 2-A7
(11)                                                                                        Class 2-A5(4)
LT2-A8                                  6.50%             $   34,500,000.00                 Class 2-A8
(12)                                                                                        Class 2-A5(4)
LT2-A9                                  6.50%             $   15,000,000.00                 Class 2-A9
(13)                                                                                        Class 2-A5(4)
LT2-A10                                 6.50%             $   35,000,000.00                 Class 2-A10
LT2-A11                                 6.50%             $    8,814,000.00                 Class 2-A11
LT2-A12                                 6.50%             $    1,050,000.00                 Class 2-A12
LT2-AX                                  (14)                      (14)                      Class 2-AX
LT2-B                                   6.50%             $   10,536,855.43                 Classes B1-B6
LT3-A1                                  6.50%             $  100,000,000.00                 Class 3-A1
LT3-A2                                  6.50%             $   15,000,000.00                 Class 3-A2
LT3-A3                                  6.50%             $   15,700,000.00                 Class 3-A3
LT3-A4                                  6.50%             $    7,732,000.00                 Class A4(3)
LT3-A5                                  0.00%             $       96,000.00                 Class 3-A5
LT3-AX                                  (15)                      (15)                      Class 3-AX
LT3-AP                                  0.00%             $      425,343.00                 Class 3-AP
</TABLE>

                                       2
<PAGE>

<TABLE>
<CAPTION>
         Lower Tier                   Lower Tier          Initial Class Principal        Corresponding Class of
     Class Designation              Interest Rate                Amount               Certificates or Components
     -----------------              -------------                ------               --------------------------
<S>                                 <C>                 <C>                           <C>
LT3-B                                   6.50%             $    6,168,213.21                 Classes B1-B6
LT4-A1                                  7.25%             $   18,181,000.00                 Class 4-A1
(16)                                                                                        Class 4-A5
LT4-A2                                  7.50%             $   20,000,000.00                 Class 4-A2
LT4-A3                                  6.75%             $   10,000,000.00                 Class 4-A3
LT4-A4                                  7.25%             $    2,200,000.00                 Class A4(4)
(17)                                                                                        Class 4-A6
LT4-A7                                  7.25%             $    6,500,000.00                 Class 4-A7
LT4-AX                                  (18)                      (18)                      Class 4-AX
LT4-AP                                  0.00%             $      304,919.00                 Class 4-AP
LT4-B                                   7.25%             $    3,328,591.11                 Classes B1-B6
LT-R                                    6.80%             $          100.00                 Class R
</TABLE>

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

(1)  The Class 1-A3 Certificates are entitled to receive on each Distribution
     Date a specified portion of the interest payable on the Class LT1-A2
     Interest. Specifically, for each Accrual Period the Class 1-A3 Certificates
     are entitled to interest accruals on the Class LT1-A2 Interest at a per
     annum rate equal to the excess, if any, of 7.95% minus LIBOR.

(2)  The Class 1-A6 Certificates are entitled to receive on each Distribution
     Date a specified portion of the interest payable on the Class LT1-A4
     Interest. Specifically, for each Accrual Period the Class 1-A6 Certificates
     are entitled to interest accruals on the Class LT1-A4 Interest at a per
     annum rate of 0.22%.

(3)  The Class LT1-AX Interest is entitled to receive on each Distribution Date
     a specified portion of the interest payable on the Pool 1 AX Loans.
     Specifically, for each Accrual Period, the Class LT1-AX Interest is
     entitled to interest accruals on the Pool 1 AX Loans at a per annum rate
     equal to the excess of the weighted average of the Net Mortgage Rates on
     the Pool 1 AX Loans over 6.80%.

(4)  The Class 2-A3 Certificates are entitled to receive on each Distribution
     Date a specified portion of the interest payable on the Class LT2-A1
     Interest. Specifically, for each Accrual Period the Class 2-A3 Certificates
     are entitled to interest accruals on the Class LT2-A1 Interest at a per
     annum rate of 1.9128%.

(5)  The Class 2-A5(2) Component is entitled to receive on each Distribution
     Date a specified portion of the interest payable on the Class LT2-A1
     Interest. Specifically, for each Accrual Period the Class 2-A5(2) Component
     is entitled to interest accruals on the Class LT2-A1 Interest at a per
     annum rate of 0.4872%.

(6)  The Class 2-A3 Certificates are entitled to receive on each Distribution
     Date a specified portion of the interest payable on the Class LT2-A2(1)
     Interest. Specifically, for each Accrual Period the Class 2-A3 Certificates
     are entitled to interest accruals on the Class LT2-A2(1) Interest at a per
     annum rate of 1.0361%.

                                       3
<PAGE>

(7)  The Class 2-A5(2) Component is entitled to receive on each Distribution
     Date a specified portion of the interest payable on the Class LT2-A2(1)
     Interest. Specifically, for each Accrual Period the Class 2-A5(2) Component
     is entitled to interest accruals on the Class LT2-A2(1) Interest at a per
     annum rate of 0.2639%.

(8)  The Class 2-A6 Certificates are entitled to receive on each Distribution
     Date a specified portion of the interest payable on the Class LT2-A2(2)
     Interest. Specifically, for each Accrual Period the Class 2-A6 Certificates
     are entitled to interest accruals on the Class LT2-A2(2) Interest at a per
     annum rate of 0.845%.

(9)  The Class 2-A5(3) Component is entitled to receive on each Distribution
     Date a specified portion of the interest payable on the Class LT2-A2(2)
     Interest. Specifically, for each Accrual Period the Class 2-A5(3) Component
     is entitled to interest accruals on the Class LT2-A2(2) Interest at a per
     annum rate of 0.455%.

(10) The Class LT2-A5(7) Interest does not have a principal balance and is
     entitled to receive on each Distribution Date a specified portion of the
     interest payable on the Pool 2 AX Loans. Specifically, for each Accrual
     Period, the Class LT2-A5(7) Interest is entitled to 30.25% of the interest
     accruals on the Pool 2 AX Loans at a per annum rate equal to the excess of
     the weighted average of the Net Mortgage Rates on the Pool 2 AX Loans over
     6.50%.

(11) The Class 2-A5(4) Component is entitled to receive on each Distribution
     Date a specified portion of the interest payable on the Class LT2-A7
     Interest. Specifically, for each Accrual Period the Class 2-A5(4) Component
     is entitled to interest accruals on the Class LT2-A7 Interest at a per
     annum rate of 0.60%.

(12) The Class 2-A5(4) Component is entitled to receive on each Distribution
     Date a specified portion of the interest payable on the Class LT2-A8
     Interest. Specifically, for each Accrual Period the Class 2-A5(4) Component
     is entitled to interest accruals on the Class LT2-A8 Interest at a per
     annum rate of 0.65%.

(13) The Class 2-A5(4) Component is entitled to receive on each Distribution
     Date a specified portion of the interest payable on the Class LT2-A9
     Interest. Specifically, for each Accrual Period the Class 2-A5(4) Component
     is entitled to interest accruals on the Class LT2-A9 Interest at a per
     annum rate of 0.50%.

(14) The Class LT2-AX Interest does not have a principal balance and is entitled
     to receive on each Distribution Date a specified portion of the interest
     payable on the Pool 2 AX Loans. Specifically, for each Accrual Period, the
     Class LT2-AX Interest is entitled to 69.75% of the interest accruals on the
     Pool 2 AX Loans at a per annum rate equal to the excess of the weighted
     average of the Net Mortgage Rates on the Pool 2 AX Loans over 6.50%.

(15) The Class LT3-AX Interest does not have a principal balance and is entitled
     to receive on each Distribution Date a specified portion of the interest
     payable on the Pool 3 AX Loans. Specifically, for each Accrual Period, the
     Class LT3-AX Interest is entitled to interest accruals on the Pool 3 AX
     Loans at a per annum rate equal to the excess of the weighted average of
     the Net Mortgage Rates on the Pool 3 AX Loans over 6.50%.

(16) The Class 4-A5 Certificates are entitled to receive on each Distribution
     Date a specified portion of the interest payable on the Class LT4-A1
     Interest. Specifically, for each Accrual Period the Class 4-A5 Certificates
     are entitled to interest accruals on the Class LT4-A1 Interest at a per
     annum rate of 1.50%.

                                       4
<PAGE>

(17) The Class 4-A6 Certificates are entitled to receive on each Distribution
     Date a specified portion of the interest payable on the Class LT4-A4
     Interest. Specifically, for each Accrual Period the Class 4-A6 Certificates
     are entitled to interest accruals on the Class LT4-A4 Interest at a per
     annum rate of 0.67%.

(18) The Class LT4-AX Interest does not have a principal balance and is entitled
     to receive on each Distribution Date a specified portion of the interest
     payable on the Pool 4 AX Loans. Specifically, for each Accrual Period, the
     Class LT4-AX Interest is entitled to interest accruals on the Pool 4 AX
     Loans at a per annum rate equal to the excess of the weighted average of
     the Net Mortgage Rates on the Pool 4 AX Loans over 7.25%.

     On each Distribution Date, the Available Distribution Amount for Pool 1,
Pool 3, and Poo1 4 shall be first applied to payment of the Class A4 Certificate
Insurer the allocable portion of the monthly Class A4 Certificate Insurance
Premium for the Class A4 Certificate Insurance Policy for that Distribution
Date, and then the Available Distribution Amount for Pool 1, Pool 2, Pool 3, and
Pool 4 shall be distributed with respect to the Lower Tier Interests in the
following manner:

     (i)       To pay interest on each Lower Tier Regular Interest at the rate
               described above in the same order and to the same extent that
               interest is to be distributed on the Corresponding Class or
               Classes of Certificates or Components for such Distribution Date;

     (ii)      For each Class of Lower Tier Interest for which there is a
               Corresponding Class of Senior Certificates entitled to principal
               distributions, to pay principal on each such Class of Lower Tier
               Interest in the same manner and in the same amount that principal
               is to be distributed on such Corresponding Class of Senior
               Certificates for such Distribution Date;

     (iii)     From the Available Distribution Amount for Pool 1, Pool 3, and
               Pool 4, to pay the Certificate Insurer any unreimbursed insurance
               payments and any other amounts due to the Certificate Insurer;

     (iv)      The excess, if any, of the Available Distribution Amount for Pool
               1 over the amounts distributed pursuant to clauses (i), (ii) and
               (iii) above is to be distributed as principal on the Class LT1-B
               Interest until its balance is reduced to zero, and then to the
               Class LT4-B Interest until its balance is reduced to zero;

     (v)       The excess, if any, of the Available Distribution Amount for Pool
               2 over the amounts distributed pursuant to clauses (i), (ii) and
               (iii) above is to be distributed as principal on the Class LT2-B
               Interest until its balance is reduced to zero;

     (vi)      The excess, if any, of the Available Distribution Amount for Pool
               3 over the amounts distributed pursuant to clauses (i), (ii) and
               (iii) above is to be distributed as principal on the Class LT3-B
               Interest until its balance is reduced to zero;

     (vii)     The excess, if any, of the Available Distribution Amount for Pool
               4 over the amounts distributed pursuant to clauses (i), (ii) and
               (iii) above is to be distributed

                                       5
<PAGE>

               as principal on the Class LT4-B Interest until its balance is
               reduced to zero, and then to the Class LT1-B Interest until its
               balance is reduced to zero.

     On each Distribution Date, Realized Losses shall be allocated among the
Lower Tier Interests in the following manner:

     (i)       Realized Losses (other than the applicable AP Percentage of such
               Realized Losses and Excess Losses allocable to the Senior
               Certificates) attributable to the Mortgage Loans in Pool 1 for
               any Distribution Date shall be allocated first to the Class LT1-B
               Interest until its principal balance is reduced to zero;

     (ii)      Realized Losses (other than the applicable AP Percentage of such
               Realized Losses and Excess Losses allocable to the Senior
               Certificates) attributable to the Mortgage Loans in Pool 4 shall
               be allocated first to the Class LT4-B Interest until its balance
               is reduced to zero;

     (iii)     Realized Losses (other than the AP Percentages of such Realized
               Losses and Excess Losses allocable to the Senior Certificates) in
               excess of the allocations made pursuant to clauses (i) and (ii)
               above are to be allocated first to the Class LT1-B or Class LT4-B
               Interests, whichever has a remaining balance, to the extent of
               its remaining principal balance, and then among the remaining
               classes of Lower Tier Interests in the same manner that such
               Realized Losses are allocated among the Corresponding Classes of
               Certificates and Components;

     (iv)      Realized Losses (other than the applicable AP Percentage of such
               Realized Losses and Excess Losses allocable to the Senior
               Certificates) attributable to the Mortgage Loans in Pool 2 for
               any Distribution Date shall be allocated to the Class LT2-B
               Interest until its principal balance is reduced to zero, and then
               among the remaining classes of Lower Tier Interests in the same
               manner that such Realized Losses are allocated among the
               Corresponding Classes of Certificates and Components;

     (v)       Realized Losses (other than the applicable AP Percentage of such
               Realized Losses and Excess Losses allocable to the Senior
               Certificates) attributable to the Mortgage Loans in Pool 3 for
               any Distribution Date shall be allocated to the Class LT3-B
               Interest until its principal balance is reduced to zero, and then
               among the remaining classes of Lower Tier Interests in the same
               manner that such Realized Losses are allocated among the
               Corresponding Classes of Certificates and Components;

     (vi)      The AP Percentage of Realized Losses with respect to Pool 1 shall
               be allocated to the Class LT1-AP Interest until its principal
               amount has been reduced to zero, the AP Percentage of Realized
               Losses with respect to Pool 2 shall be allocated to the Class
               LT2-A5(6) Interest until its principal amount has been reduced to
               zero, the AP Percentage of Realized Losses with respect to Pool 3
               shall be allocated to the Class LT3-AP Interest until its
               principal amount has been reduced to zero the AP Percentage of
               Realized Losses with respect to Pool 4 shall be allocated to the
               Class LT4-AP Interest until its principal amount has been reduced
               to zero .

                                       6
<PAGE>

     Net Prepayment Shortfalls and Excess Losses are to be allocated among the
Classes of Lower Tier Interests in the same manner that such items are allocated
among the Corresponding Classes of Certificates and Components.

UPPER TIER REMIC

     The following table specifies the Class designation, Certificate Interest
Rate, initial Class Principal (or Notional) Amount and minimum denomination (by
dollar amount or Percentage Interest) for each Class of Certificates
constituting the interests in the Trust Fund created hereunder.

<TABLE>
<CAPTION>
                                                                                           Minimum Denomination or
                                     Certificate             Initial Class Principal         Minimum Percentage
Class Designation                   Interest Rate             (or Notional) Amount                 Interest
-----------------                   -------------             --------------------                 --------
<S>                                  <C>                    <C>                            <C>
Class 1-A1                              6.60%                 $     68,725,000                 $         25,000
Class 1-A2                               (1)                  $     19,850,000                 $         25,000
Class 1-A3                               (2)                           (3)                     $      1,000,000
Class 1-A5                              6.60%                 $    100,000,000                 $         25,000
Class 1-A6                              6.80%                          (4)                                 100%
Class 1-AP                              0.00%                 $        608,967                              100%
Class 1-AX                              6.80%                          (5)                     $      1,000,000
Class 2-A1                              4.10%                 $     50,000,000                 $         25,000
Class 2-A2                              5.20%                 $     61,160,000                 $         25,000
Class 2-A3                              6.50%                          (6)                     $      1,000,000
Class 2-A5                               (7)                  $     69,985,386                 $         25,000
Class 2-A6                              6.50%                          (8)                     $      1,000,000
Class 2-A7                              5.90%                 $     15,000,000                 $         25,000
Class 2-A8                              5.85%                 $     34,500,000                 $         25,000
Class 2-A9                              6.00%                 $     15,000,000                 $         25,000
Class 2-A10                             6.50%                 $     35,000,000                 $         25,000
Class 2-A11                             6.50%                 $      8,814,000                 $         25,000
Class 2-A12                             6.50%                 $      1,050,000                 $         25,000
Class 2-AX                              6.50%                          (9)                     $      1,000,000
Class 3-A1                              6.50%                 $    100,000,000                 $         25,000
Class 3-A2                              6.50%                 $     15,000,000                 $         25,000
Class 3-A3                              6.50%                 $     15,700,000                 $         25,000
Class 3-A5                              0.00%                 $         96,000                              100%
Class 3-AP                              0.00%                 $        425,343                              100%
Class 3-AX                              6.50%                         (10)                     $      1,000,000
Class 4-A1                              5.75%                 $     18,181,000                 $         25,000
Class 4-A2                              7.50%                 $     20,000,000                 $         25,000
Class 4-A3                              6.75%                 $     10,000,000                 $         25,000
Class 4-A5                              7.25%                         (11)                                  100%
Class 4-A6                              7.25%                         (12)                                  100%
</TABLE>

                                       7
<PAGE>

<TABLE>
<CAPTION>
                                                                                           Minimum Denomination or
                                     Certificate             Initial Class Principal         Minimum Percentage
Class Designation                   Interest Rate             (or Notional) Amount                 Interest
-----------------                   -------------             --------------------                 --------
<S>                                  <C>                    <C>                            <C>
Class 4-A7                              7.25%                 $      6,500,000                 $         25,000
Class 4-AP                               0.00%                $        304,919                              100%
Class 4-AX                               7.25%                        (13)                                  100%
Class A4                                 6.50%                $     30,924,000                 $          1,000
Class B1                                  (14)                $     15,861,000                 $        100,000
Class B2                                  (14)                $      6,024,000                 $        100,000
Class B3                                  (14)                $      4,351,000                 $        100,000
Class B4                                  (14)                $      2,103,000                 $        250,000
Class B5                                  (14)                $      2,103,000                 $        250,000
Class B6                                  (14)                $      1,824,206                 $        250,000
Class R                                  6.50%                $            100                 $            100
</TABLE>

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

(1)  The Certificate Interest Rate with respect to any Distribution Date (and
     the related Accrual Period) for the Class 1-A2 Certificates is the per
     annum rate equal to the lesser of (1) LIBOR plus 0.55% and (2) 8.50%,
     subject to a minimum rate of 0.55%.

(2)  The Certificate Interest Rate with respect to any Distribution Date (and
     the related Accrual Period) for the Class 1-A3 Certificates is the per
     annum rate equal to 7.95% minus LIBOR, subject to a minimum rate of 0.00%.

(3)  The Class Notional Balance with respect to any Distribution Date (and the
     related Accrual Period) for the Class 1-A3 shall equal the Class Principal
     Amount of the Class 1-A2 Certificates immediately before such Distribution
     Date.

(4)  The Class Notional Amount of the Class 1-A6 Certificates for any
     Distribution Date shall equal the product of (A) 3.2352941176% and (B) the
     Component Principal Amount of the A4(1) Component immediately before that
     Distribution Date.

(5)  The Class Notional Amount of the Class 1-AX Certificates for any
     Distribution Date shall equal the product of (A) a fraction, the numerator
     of which is the excess of the weighted average of the Net Mortgage Rates of
     the Pool 1 AX Loans at the beginning of the related Due Period over 6.80%,
     and the denominator of which is 6.80%, and (B) the total Scheduled
     Principal Balance of the Pool 1 AX Loans as of the first day of the related
     Accrual Period.

(6)  The Class Notional Amount of the Class 2-A3 Certificates for any
     Distribution Date shall equal the sum of (A) the product of (1)
     29.4276923077% and (2) the Class Principal Amount of the Class 2-A1
     Certificates immediately prior to that Distribution Date and (B) the
     product of (1) 15.9400000000% and (2) the greater of (x) zero; and (y) the
     Class Principal Amount of the Class 2-A2 Certificates immediately prior to
     that Distribution Date less $24,360,000.

(7)  The Class 2-A5 Certificate consists of seven Components: the Class 2-A5(1),
     Class 2-A5(2), Class 2-A5(3), Class 2-A5(4), Class 2-A5(6) and Class
     2-A5(7) Components and

                                       8
<PAGE>

     shall be entitled on each Distribution Date to all interest distributable
     with respect to the corresponding Lower Tier REMIC Interests.

(8)  The Class Notional Amount of the Class 2-A6 Certificates for any
     Distribution Date shall equal the product of (A) 13.0000000000% and (B) the
     lesser of (x) $24,360,000 and (y) the Class Principal Amount of the Class
     2-A2 Certificates immediately prior to that Distribution Date.

(9)  The Class Notional Amount of the Class 2-AX Certificates for any
     Distribution Date shall equal the product of (A) 69.75% and (B) of the
     product of (a) a fraction, the numerator of which is the excess of the
     weighted average of the Net Mortgage Rates of the Pool 2 AX Loans at the
     beginning of the related Due Period over 6.50%, and the denominator of
     which is 6.50%, and (b) the total Scheduled Principal Balance of the Pool 2
     AX Loans as of the first day of the related Accrual Period.

(10) The Class Notional Amount of the Class 3-AX Certificates for any
     Distribution Date shall equal the product of (A) a fraction, the numerator
     of which is the excess of the weighted average of the Net Mortgage Rates of
     the Pool 3 AX Loans at the beginning of the related Due Period over 6.50%,
     and the denominator of which is 6.50%, and (B) the total Scheduled
     Principal Balance of the Pool 3 AX Loans as of the first day of the related
     Accrual Period.

(11) The Class Notional Amount of the Class 4-A5 Certificates for any
     Distribution Date shall equal the product of (A) 20.6896551724% and (B) the
     Class Principal Amount of the Class 4-A1 Certificates immediately prior to
     that Distribution Date.

(12) The Class Notional Amount of the Class 4-A6 Certificates for any
     Distribution Date shall equal to the product of (A) 9.2413793103% and (B)
     the Component Principal Amount of the A4(4) Component immediately prior to
     that Distribution Date.

(13) The Class Notional Amount of the Class 4-AX Certificates for any
     Distribution Date shall equal the product of (A) a fraction, the numerator
     of which is the excess of the weighted average of the Net Mortgage Rates of
     the Pool 4 AX Loans at the beginning of the related Due Period over 7.25%,
     and the denominator of which is 7.25%, and (B) the total Scheduled
     Principal Balance of the Pool 4 AX Loans as of the first day of the related
     Accrual Period.

(14) The Interest Rate for the Class B1, Class B2, Class B3, Class B4, Class B5
     and Class B6 Certificates for each Accrual Period will be an annual rate
     equal to the weighted average of the Component Interest Rates of the
     Components of such Classes.

     As of the Cut-off Date, the Mortgage Loans had an aggregate Scheduled
Principal Balance of $729,090,922.55.

     For purposes hereof, each pool of mortgage loans constitutes a fully
separate and distinct sub-trust.

                                       9
<PAGE>

                                   ARTICLE I

                                   DEFINITIONS

     Section 1.01. Definitions.

     The following words and phrases, unless the context otherwise requires,
shall have the following meanings:

     Accepted Servicing Practices: With respect to any Mortgage Loan, as
applicable, either (x) those customary mortgage servicing practices of prudent
mortgage servicing institutions that service or master service mortgage loans of
the same type and quality as such Mortgage Loan in the jurisdiction where the
related Mortgaged Property is located, to the extent applicable to the Trustee
or the Master Servicer or (y) as provided in the applicable Servicing Agreement,
to the extent applicable to the related Servicer.

     Accountant: A person engaged in the practice of accounting who (except when
this Agreement provides that an Accountant must be Independent) may be employed
by or affiliated with the Depositor or an Affiliate of the Depositor.

     Accretion Directed Certificate: None.

     Accretion Termination Date: With respect to the 2-A5(5) Component, the
earlier of (x) the Credit Support Depletion Date with respect to Group 2 and (y)
the first Distribution Date on which the Class Principal Amounts of the Class
2-A7, Class 2-A8, Class 2-A9, Class 2-A10 and Class 2-A11 Certificates have each
been reduced to zero; and with respect to the Class 2-A11 Certificates, the
earlier of (x) the Credit Support Depletion Date with respect to Group 2 and (y)
the first Distribution Date on which the Class Principal Amounts of the Class
2-A7, Class 2-A8, Class 2-A9 and Class 2-A10 Certificates and the Component
Principal Amount of the 2-A5(5) Component have each been reduced to zero.

     Accrual Amount: As to any Class of Accrual Certificates or Accrual
Components and each Distribution Date through the applicable Accretion
Termination Date, the sum of (x) any amount of Accrued Certificate Interest
allocable to such Class or Component pursuant to Section 5.02(a)(ii) on such
Distribution Date and (y) any Interest Shortfall allocable to such Class or
Component pursuant to Section 5.02(a)(iii) on such Distribution Date. As to any
Class of Accrual Certificates or Accrual Components and each Distribution Date
after the applicable Accretion Termination Date, zero.

     Accrual Certificate: Any Class 2-A11 Certificate.

     Accrual Component: The 2-A5(5) Component.

     Accrual Period: With respect to any Distribution Date and any Class of
Certificates (other than any Class of Principal Only Certificates and any LIBOR
Certificates) and each Class of Lower Tier Interests, the one-month period
beginning immediately following the end of the preceding Accrual Period (or from
the Cut-off Date, in the case of the first Accrual Period) and ending on the
last day of the month immediately preceding the month in which such Distribution

                                       10
<PAGE>

Date occurs. With respect to any Distribution Date and any LIBOR Certificates,
the period beginning on the Distribution Date in the calendar month preceding
the month in which the related Distribution Date occurs (or on November 25,
2001, in the case of the first Accrual Period) and ending on the day immediately
preceding the related Distribution Date.

     Accrued Certificate Interest: As to any Class of Certificates (other than
any Class of Principal Only Certificates and Component Certificates) and any
Component (other than any Principal Only Component) and any Distribution Date,
the product of the Certificate Interest Rate for such Class of Certificates (or
the Component Interest Rate for such Component) and the Class Principal Amount
(or Class Notional Amount) of such Class of Certificates (or the Component
Principal Amount or Component Notional Amount of such Component) immediately
preceding such Distribution Date, as reduced by such Class' or Component's share
of the interest portion of (i) any Excess Losses for the related Mortgage Pool
for such Distribution Date and (ii) any Relief Act Reduction for the related
Mortgage Pool for such Distribution Date, in each case allocable among the
related Non-AP Senior Certificates and Components, and the Subordinate
Components pro rata based on (1) in the case of such Non-AP Senior Certificates
and Components (other than any B(1-4) Components), the Accrued Certificate
Interest otherwise distributable thereon; and (2) in the case of the B(1-4)
Components, interest otherwise distributable on the Apportioned Principal
Balance of such Components attributable to the Mortgage Pool that sustained the
Excess Loss or Relief Act Reduction.

     As to any Class of Component Certificates, on any Distribution Date, the
aggregate of Accrued Certificate Interest for the related Accrual Period on the
Components of such Class for such date. Interest shall accrue on the basis of a
360-day year comprising twelve 30-day months.

     Act: As defined in Section 3.03(c).

     Additional Collateral: With respect to any Additional Collateral Mortgage
Loan, the marketable securities or guarantee held from time to time as security
for the repayment of such loan.

     Additional Collateral Mortgage Loan: Any Mortgage Loan as to which
collateral in addition to the related Mortgaged Property is pledged as security
therefor.

     Additional Collateral Servicing Agreement: The Additional Collateral
Servicing Agreement, dated as of March 29, 2001 between Cendant Mortgage
Corporation and Lehman Brothers Bank, FSB.

     Advance: An advance of the aggregate of payments of principal and interest
(net of the applicable Servicing Fee) on one or more Mortgage Loans that were
due on the Due Date in the related Due Period and not received as of the close
of business on the related Determination Date, required to be made by or on
behalf of the Master Servicer and the related Servicer (or by the Trustee)
pursuant to Section 5.04.

     Affiliate: With respect to any specified Person, any other Person
controlling or controlled by or under common control with such specified Person.
For the purposes of this definition, "control" when used with respect to any
specified Person means the power to direct the management and policies of such
Person, directly or indirectly, whether through the

                                       11
<PAGE>

ownership of voting securities, by contract or otherwise; and the terms
"controlling" and "controlled" have meanings correlative to the foregoing.

     Aggregate Certificate Insurance Premium: As to any Distribution Date, the
sum of (a) the Certificate Insurance Premium for such Distribution Date and (b)
the amount of any Certificate Insurance Premium that was not distributed to the
Certificate Insurer on any prior Distribution Date.

     Aggregate Principal Balance: The aggregate of the Scheduled Principal
Balances for all Mortgage Loans at any date of determination.

     Aggregate Voting Interests: The aggregate of the Voting Interests of all
the Certificates under this Agreement.

     Agreement: This Trust Agreement and all amendments and supplements hereto.

     AP Percentage: As to any Discount Mortgage Loan, the percentage equivalent
of a fraction, the numerator of which is the applicable Designated Rate minus
the Net Mortgage Rate of such Discount Mortgage Loan and the denominator of
which is the applicable Designated Rate. As to any Non-Discount Mortgage Loan,
0%.

     AP Principal Distribution Amount: For any Distribution Date and for each
Mortgage Pool, the sum of the following amounts:

         (i) the applicable AP Percentage of the principal portion of each
     Scheduled Payment (without giving effect to any Debt Service Reduction
     occurring prior to the Bankruptcy Coverage Termination Date) on each
     Mortgage Loan in the related Mortgage Pool due during the related Due
     Period;

         (ii) the applicable AP Percentage of each of the following amounts: (1)
     each Principal Prepayment collected on a Mortgage Loan in the related
     Mortgage Pool during the applicable Prepayment Period, (2) each other
     unscheduled collection, including Insurance Proceeds and Net Liquidation
     Proceeds (other than with respect to any Mortgage Loan in the related
     Mortgage Pool that was finally liquidated during the applicable Prepayment
     Period), representing or allocable to recoveries of principal of such
     Mortgage Loan in the related Mortgage Pool received during the applicable
     Prepayment Period and (3) the principal portion of all proceeds of the
     purchase of any Mortgage Loan in the related Mortgage Pool (or, in the case
     of a permitted substitution, amounts representing a principal adjustment)
     actually received by the Trustee with respect to the applicable Prepayment
     Period;

         (iii) with respect to unscheduled recoveries allocable to principal of
     any Mortgage Loan in the related Mortgage Pool that was finally liquidated
     during the related Prepayment Period, the applicable AP Percentage of the
     related net Liquidation Proceeds allocable to principal; and

         (iv) any amounts described in clauses (i) through (iii) for any
     previous Distribution Date that remain unpaid.

                                       12
<PAGE>

     Apportioned Principal Balance: With respect to each Distribution Date and
any of the B1(1-4), B2(1-4), B3(1-4), B4(1-4), B5(1-4) and B6(1-4) Components:
(i) in the case of Pool 1, the product of (a) the Component Principal Amount of
such Component immediately prior to such Distribution Date and (b) a fraction,
the numerator of which is the Group Subordinate Amount for Pool 1 for such date,
and the denominator of which is the sum of the Group Subordinate Amounts for
Pool 1 and Pool 4 for such date; and, (ii) in the case of Pool 4, the product of
(a) the Component Principal Amount of such Component immediately prior to such
Distribution Date and (b) a fraction, the numerator of which is the Group
Subordinate Amount for Pool 4 for such date, and the denominator of which is the
sum of the Group Subordinate Amounts for Pool 1 and Pool 4 for such date.

     Appraised Value: With respect to any Mortgage Loan, the amount set forth in
an appraisal made in connection with the origination of such Mortgage Loan as
the value of the related Mortgaged Property.

     Assignment of Mortgage: An assignment of the Mortgage, notice of transfer
or equivalent instrument, in recordable form, sufficient under the laws of the
jurisdiction wherein the related Mortgaged Property is located to reflect the
sale of the Mortgage to the Trustee, which assignment, notice of transfer or
equivalent instrument may be in the form of one or more blanket assignments
covering the Mortgage Loans secured by Mortgaged Properties located in the same
jurisdiction, if permitted by law; provided, however, that the Trustee shall not
be responsible for determining whether any such assignment is in recordable
form.

     Aurora: Aurora Loan Services Inc. or its successor in interest, in its
capacity as a Servicer.

     Authenticating Agent: Any authenticating agent appointed by the Trustee
pursuant to Section 6.10.

     Authorized Officer: Any Person who may execute an Officer's Certificate on
behalf of the Depositor.

     Available Distribution Amount: As to each Mortgage Pool and on any
Distribution Date, the sum of the following amounts:

         (i) the total amount of all cash received by the Master Servicer
     through the Remittance Date applicable to each Servicer and deposited by
     the Master Servicer by the Deposit Date for such Distribution Date on the
     Mortgage Loans of such Mortgage Pool (including proceeds of any Insurance
     Policy and any other credit support relating to such Mortgage Loans and
     including recoveries through liquidation of any REO Property), plus all
     Advances made by the Master Servicer or any Servicer (or the Trustee in its
     capacity as successor Master Servicer) for such Distribution Date, any
     Compensating Interest Payment for such date and Mortgage Pool and any
     amounts paid by any Servicer in respect of Prepayment Interest Shortfalls
     in respect of the related Mortgage Loans for such date, and any proceeds of
     any purchase of a related Mortgage Loan but not including:

                                       13
<PAGE>

            (a) all amounts distributed pursuant to Section 5.02 on prior
         Distribution Dates;

            (b) all Scheduled Payments of principal and interest collected but
         due on a date subsequent to the related Due Period;

            (c) all Principal Prepayments received or identified by the
         applicable Servicer after the applicable Prepayment Period (together
         with any interest payments received with such prepayments to the extent
         that they represent the payment of interest accrued on the related
         Mortgage Loans for the period subsequent to the applicable Prepayment
         Period);

            (d) any other unscheduled collection, including Net Liquidation
         Proceeds and Insurance Proceeds, received by the Master Servicer after
         the applicable Prepayment Period;

            (e) all fees and amounts due or reimbursable to the Master Servicer,
         the Trustee, a Custodian or any Servicer pursuant to the terms of this
         Agreement, a Custodial Agreement or the applicable Servicing Agreement;

            (f) any Prepayment Penalty Amounts; and

            (g) such portion of each payment in respect of interest representing
         Retained Interest; and

         (ii) any other payment made by the Master Servicer, any Servicer, any
     Seller, the Depositor, or any other Person with respect to such
     Distribution Date (including the Purchase Price with respect to any
     Mortgage Loan purchased by the related Seller, the Depositor or any other
     Person).

     Average Rate: For each Distribution Date, the weighted average of the
Designated Rates for Pool 1 and Pool 4, weighted on the basis of the Group
Subordinate Amount for each such Mortgage Pool.

     Balloon Mortgage Loan: Not Applicable.

     Balloon Payment: None.

     Bankruptcy: With respect to any Person, the making of an assignment for the
benefit of creditors, the filing of a voluntary petition in bankruptcy,
adjudication as a bankrupt or insolvent, the entry of an order for relief in a
bankruptcy or insolvency proceeding, the seeking of reorganization, arrangement,
composition, readjustment, liquidation, dissolution or similar relief, or
seeking, consenting to or acquiescing in the appointment of a trustee, receiver
or liquidator, dissolution, or termination, as the case may be, of such Person
pursuant to the provisions of either the United States Bankruptcy Code of 1986,
as amended, or any other similar state laws.

                                       14
<PAGE>

     Bankruptcy Coverage Termination Date: With respect to any Mortgage Pool,
the Distribution Date on which the Bankruptcy Loss Limit has been reduced to
zero (or less than zero).

     Bankruptcy Loss Limit: As of the Cut-off Date, $100,000 for Pools 1, 3 and
4 and $102,200 for Pool 2, which amounts shall be reduced from time to time by
the amount of Bankruptcy Losses allocated to the related Certificates.

     Bankruptcy Losses: With respect to the Mortgage Loans in the related
Mortgage Pool, losses that are incurred as a result of Deficient Valuations and
any reduction, in a bankruptcy proceeding, of the amount of the Scheduled
Payment on a Mortgage Loan other than as a result of a Deficient Valuation.

     Benefit Plan Opinion: An Opinion of Counsel satisfactory to the Trustee to
the effect that any proposed transfer will not (i) cause the assets of the Trust
Fund to be regarded as plan assets for purposes of the Plan Asset Regulations or
(ii) give rise to any fiduciary duty on the part of the Depositor or the
Trustee.

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

     Book-Entry Certificates: Beneficial interests in Certificates designated as
"Book-Entry Certificates" in this Agreement, ownership and transfers of which
shall be evidenced or made through book entries by a Clearing Agency as
described in Section 3.09; provided, that after the occurrence of a condition
whereupon book-entry registration and transfer are no longer permitted and
Definitive Certificates are to be issued to Certificate Owners, such Book-Entry
Certificates shall no longer be "Book-Entry Certificates." As of the Closing
Date, all of the Classes of Certificates listed in the second table of the
Preliminary Statement, other than the Class E, Class P and Class R Certificates,
constitute Book-Entry Certificates.

     Business Day: Any day other than (i) a Saturday or a Sunday, (ii) a day on
which banking institutions in Colorado, Minnesota, Maryland, New York, New York
or, if other than New York, the city in which the Certificate Insurer is
located, the city in which the Corporate Trust Office of the Trustee is located,
or (iii) with respect to any Remittance Date or any Servicer reporting date, the
States specified in the definition of "Business Day" in the applicable Servicing
Agreement, are authorized or obligated by law or executive order to be closed.

     Certificate: Any one of the certificates signed and countersigned by the
Trustee in substantially the forms attached hereto as Exhibit A.

     Certificate Account: The account maintained by the Trustee in accordance
with the provisions of Section 4.04.

     Certificate Group: The Group 1, the Group 2, the Group 3 or the Group 4
Certificates, as applicable.

     Certificate Insurance Premium: With respect to any Distribution Date and
with respect to the Class A4 Certificate Insurance Policy, an amount equal to
1/12th of the product of (a) the sum of (i) the Component Principal Amount of
the Class A4 (1) Component, (ii) the Component

                                       15
<PAGE>

Principal Amount of the Class A4(3) Component and (iii) the Component Principal
Amount of the Class A4(4) Component, each as of such Distribution Date (prior to
giving effect to any distribution thereon on such Distribution Date) and (b) the
Class A4 Premium Percentage.

     Certificate Insurer: MBIA Insurance Corporation, or any successor thereto,
as issuer of the Class A4 Certificate Insurance Policy.

     Certificate Insurer Default: The occurrence and continuance of any of the
following events:

     (a) the Certificate Insurer shall have failed to make a payment required to
be made under the Class A4 Certificate Insurance Policy in accordance with its
terms;

     (b) the Certificate Insurer shall have (i) filed a petition or commenced a
case or proceeding under any provision or chapter of the United States
Bankruptcy Code or any other similar federal or state law relating to
insolvency, bankruptcy, rehabilitation, liquidation or reorganization, (ii) made
a general assignment for the benefit of its creditors, or (iii) had an order for
relief entered against it under the United States Bankruptcy Code or any other
similar federal or state law relating to insolvency, bankruptcy, rehabilitation,
liquidation or reorganization that is final and nonappealable; or

     (c) a court of competent jurisdiction, the Office of the Commissioner of
Insurance of the State of New York or other competent regulatory authority shall
have entered a final and nonappealable order, judgment or decree (i) appointing
a custodian, trustee, agent or receiver for the Certificate Insurer or for all
or any material portion of its property or (ii) authorizing the taking of
possession by a custodian, trustee, agent or receiver of the Certificate Insurer
(or the taking of possession of all or any material portion of the property of
the Certificate Insurer).

     Certificate Interest Rate: With respect to each Class of Certificates
(other than the Principal Only Certificates), the applicable per annum rate
specified or determined as provided in the Preliminary Statement hereto.

     Certificate Owner: With respect to a Book-Entry Certificate, the Person who
is the owner of such Book-Entry Certificate, as reflected on the books of the
Clearing Agency, or on the books of a Person maintaining an account with such
Clearing Agency (directly or as an indirect participant, in accordance with the
rules of such Clearing Agency).

     Certificate Principal Amount: With respect to any Certificate other than a
Component Certificate, at the time of determination, the maximum specified
dollar amount of principal to which the Holder thereof is then entitled
hereunder, such amount being equal to the initial principal amount set forth on
the face of such Certificate (plus, in the case of any Negative Amortization
Certificate, any Deferred Interest allocated thereto on previous Distribution
Dates, and plus, in the case of any Accrual Certificate, its Percentage Interest
of any related Accrual Amount for each previous Distribution Date), less the
amount of all principal distributions previously made with respect to such
Certificate and all Realized Losses allocated to such Certificate. With respect
to any Component Certificate, at the time of determination, its Percentage
Interest of the sum of the Component Principal Amounts of the Components of the
related Class. For purposes of Article V hereof, unless specifically provided to
the contrary,

                                       16
<PAGE>

Certificate Principal Amounts and Component Principal Amounts shall be
determined as of the close of business of the immediately preceding Distribution
Date, after giving effect to all distributions made on such date. Notional
Certificates are issued without Certificate Principal Amounts.

     Certificate Register and Certificate Registrar: The register maintained and
the registrar appointed pursuant to Section 3.02.

     Certificateholder: The meaning provided in the definition of "Holder."

     Class: All Certificates bearing the same class designation, and, in the
case of each Lower Tier REMIC, all Lower Tier Interests bearing the same
designation.

     Class A4 Certificate Insurance Policy: The Certificate Guaranty Insurance
Policy No. 36874 dated the Closing Date, including any endorsements thereto
issued by the Certificate Insurer to the Trustee for the benefit of the Holders
of the Class A4 Certificates, a copy of which is attached as Exhibit M hereto.

     Class A4 Guaranteed Distributions: (a) With respect to any Distribution
Date, (i) the Accrued Certificate Interest for the Class A4 Certificates for
such Distribution Date, including the amount of any Net Prepayment Interest
Shortfalls relating to prepayments and any Relief Act Reductions allocable to
such Class A4 Certificates on such Distribution Date that are not covered by the
Class A4 Reserve Fund and (ii) the amount of any Realized Loss allocated to the
Class A4 Certificates on such Distribution Date and (b) for the Final Scheduled
Distribution Date, the Class Principal Amount of the Class A4 Certificates to
the extent unpaid on the Final Scheduled Distribution Date.

     Class A4 Policy Payments Account: The separate Eligible Account created and
maintained by the Trustee pursuant to Section 5.07(c) in the name of the Trustee
for the benefit of the Class A4 Certificateholders and designated, "Wells Fargo
Bank Minnesota, National Association, Class A4 Policy Payments Account in trust
for registered holders of Structured Asset Securities Corporation Mortgage
Pass-Through Certificates, Series 2001-17, Class A4." Funds in the Class A4
Policy Payments Account shall be held in trust for the benefit of the Class A4
Certificateholders for the uses and purposes set forth in this Agreement.

     Class A4 Premium Percentage: The meaning assigned to such term in the
Insurance Agreement.

     Class A4 Reserve Fund: The separate Eligible Account created and maintained
by the Trustee pursuant to Section 4.06 with a depository institution in the
name of the Trustee for the benefit of the Class A4 Certificateholders and
designated "Wells Fargo Bank Minnesota, National Association, Class A4 Reserve
Fund in trust for registered holders of Structured Asset Securities Corporation
Mortgage Pass-Through Certificates, Series 2001-17, Class A4." The Class A4
Reserve Fund shall not be a part of any REMIC and, for all federal and state
income tax purposes, shall be beneficially owned by Lehman Brothers Inc.

     Class AP Certificate: Any Class 1-AP, Class 3-AP or Class 4-AP Certificate
or the 2-A5(6) Component.

                                       17
<PAGE>

     Class AP Deferred Amount: With respect to any Distribution Date on or prior
to the Credit Support Depletion Date and with respect to each Class or Component
of Class AP Certificates, the sum of (i) the aggregate of the applicable AP
Percentage of the principal portion of each Realized Loss (other than any Excess
Loss) for such Distribution Date on a Discount Mortgage Loan in the related
Mortgage Pool and (ii) all such amounts previously allocated thereto and not
distributed to such Class or Component as a Class AP Deferred Amount.

     Class 3-A3 Priority Amount: As to any Distribution Date, and the Class 3-A3
Certificates, the NAS Priority Amount for such Class and date.

     Class 4-A7 Priority Amount: As to any Distribution Date, and the Class 4-A7
Certificates, the NAS Priority Amount for such Class on such date.

     Class B Certificate: Any Class B1, Class B2, Class B3, Class B4, Class B5
or Class B6 Certificate.

     Class E Certificate: The Class E Certificate executed by the Trustee and
authenticated by the Certificate Registrar, substantially in the form annexed
hereto as Exhibit A, evidencing beneficial ownership of the Class E
Distributable Amount.

     Class E Distributable Amount: With respect to each Distribution Date,
interest received on each Employee Mortgage Loan with respect to which the
mortgagor has ceased to be eligible for the Employee Discount Rate at a per
annum rate equal to 0.25%.

     Class P Certificate: The Class P Certificate executed by the Trustee and
authenticated by the Certificate Registrar, substantially in the form annexed
hereto as Exhibit A, evidencing beneficial ownership of the Prepayment Penalty
Amounts.

     Class LT-R Interest: The sole residual interest in the Lower Tier REMIC.

     Class Notional Amount: With respect to each Class of Notional Certificates,
the applicable class notional amount calculated as provided in the Preliminary
Statement hereto.

     Class Principal Amount: With respect to each Class of Certificates other
than any Class of Notional Certificates, the aggregate of the Certificate
Principal Amounts of all Certificates of such Class at the date of
determination. With respect to each Class of Notional Certificates, zero.

     Clearing Agency: An organization registered as a "clearing agency" pursuant
to Section 17A of the Securities Exchange Act of 1934, as amended. As of the
Closing Date, the Clearing Agency shall be The Depository Trust Company.

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

     Clearstream: Clearstream Banking, societe anonyme, and any successor
thereto.

                                       18
<PAGE>

     Closing Date: November 30, 2001.

     Code: The Internal Revenue Code of 1986, as amended, and as it may be
further amended from time to time, any successor statutes thereto, and
applicable U.S. Department of Treasury regulations issued pursuant thereto in
temporary or final form.

     Collection Account: A separate account established and maintained by the
Master Servicer pursuant to Section 4.01.

     Compensating Interest Payment: With respect to each Mortgage Pool and any
Distribution Date, an amount equal to the excess of (x) the aggregate of any
Prepayment Interest Shortfalls with respect to such Mortgage Pool and such
Distribution Date over (y) the aggregate of any amounts required to be paid by
any Servicer in respect of such shortfalls but not paid; provided that the
aggregate Compensating Interest Payment to be paid by the Master Servicer for
any Distribution Date shall not exceed the Master Servicing Fee that would be
payable to the Master Servicer without giving effect to any Compensating
Interest Payment.

     Component: Each of the components having the designations, initial
Component Principal Amounts or initial Component Notional Amounts, as
applicable, and Component Interest Rates as follows:

<TABLE>
<CAPTION>
                                                Initial Component
                                                Principal Amount
              Component                           or Component                  Component
             Designation                         Notional Amount              Interest Rate
---------------------------------------       ---------------------         -------------------
<S>                                               <C>                             <C>
A4(1)................................              $20,992,000                     6.50%
A4(3)................................              $ 7,732,000                     6.50%
A4(4)................................              $ 2,200,000                     6.50%
2-A5(1)..............................              $14,711,000                     6.50%
2-A5(2)..............................              $ 5,241,772                     6.50%
2-A5(3)..............................              $ 1,705,200                     6.50%
2-A5(4)..............................              $ 5,988,461                     6.50%
2-A5(5)..............................              $55,100,000                     6.50%
2-A5(6)..............................              $   174,386                     0.00%
2-A5(7)..............................              $ 7,451,829                     6.50%
B1(1-4)..............................              $ 7,780,000                  Average Rate
B1(2) ...............................              $ 4,816,000                     6.50%
B1(3)................................              $ 3,265,000                     6.50%
B2(1-4)..............................              $ 2,829,000                  Average Rate
B2(2)................................              $ 2,107,000                     6.50%
B2(3)................................              $ 1,088,000                     6.50%
B3(1-4)..............................              $ 2,121,000                  Average Rate
B3(2)................................              $ 1,505,000                     6.50%
B3(3)................................              $   725,000                     6.50%
B4(1-4)..............................              $   989,000                  Average Rate
B4(2)................................              $   752,000                     6.50%
B4(3)................................              $   362,000                     6.50%
</TABLE>

                                       19
<PAGE>

<TABLE>
<CAPTION>
                                                Initial Component
                                                Principal Amount
              Component                           or Component                  Component
             Designation                         Notional Amount              Interest Rate
---------------------------------------       ---------------------         -------------------
<S>                                               <C>                             <C>
B5(1-4)..............................              $   989,000                  Average Rate
B5(2)................................              $   752,000                     6.50%
B5(3)................................              $   362,000                     6.50%
B6(1-4)..............................              $   853,138                  Average Rate
B6(2)................................              $   604,855                     6.50%
B6(3)................................              $   366,213                     6.50%
</TABLE>

     Component Certificate: Any Class 2-A5, or Class A4 Certificate and any
Subordinate Certificate.

     Component Interest Rate: As set forth in the chart above.

     Component Notional Amount: For any Distribution Date, with respect to -

o    The Class 2-A5(2) Component, the sum of (i) the product of (a)
     7.4953846153846% and (b) the Class Principal Amount of the Class 2-A1
     Certificates immediately prior to such Distribution Date, and (ii) the
     product of (a) 4.06% and (b) the greater of (I) zero, and (II) the Class
     Principal Amount of the Class 2-A2 Certificates immediately prior to such
     Distribution Date minus $24,360,000;

o    The Class 2-A5(3) Component, the product of (i) 7.00% and (ii) the lesser
     of (a) $24,360,000, and (b) the Class Principal Amount of the Class 2-A2
     Certificates immediately prior to such Distribution Date;

o    The Class 2-A5(4) Component, the sum of (i) the product of (a)
     9.23076923076923% and (b) the Class Principal Amount of the Class 2-A7
     Certificates immediately before such Distribution Date, (ii) the product of
     (a) 10.00% and (b) the Class Principal Amount of the Class 2-A8
     Certificates immediately prior to such Distribution Date and (iii) the
     product of (a) 7.69230769230769% and (b) the Class Principal Amount of the
     Class 2-A9 Certificates immediately prior to such Distribution Date;

o    The Class 2-A5(7) Component, the product of (i) 30.25% and (ii) the product
     of (a) a fraction, the numerator of which is the excess of the weighted
     average of the Net Mortgage Rates of the Pool 2 AX Loans at the beginning
     of the related Due Period over 6.50%, and the denominator of which is
     6.50%, and (b) the total Scheduled Principal Balance of the Pool 2 AX Loans
     as of the first day of the related Accrual Period.

     Component Percentage: With respect to each Subordinate Component and each
Distribution Date, the percentage obtained by dividing the Component Principal
Amount of such Component immediately prior to such Distribution Date by the sum
of the Class Principal Amounts of all Classes of related Senior Certificates and
the Component Principal Amounts of all related Components immediately prior to
such date.

                                       20
<PAGE>

     Component Principal Amount: With respect to each Component other than a
Notional Component as of any Distribution Date, the initial Component Principal
Amount of such Component (as described in the definition of "Component") as of
the Closing Date as (a) reduced by (i) all amounts previously distributed on
that Component in respect of principal and the principal portion of any Realized
Losses previously allocated to that Component and (ii) in the case of any
Subordinate Component any Component Writedown Amount allocated to such
Subordinate Component, and, (b) in the case of any Accrual Component, as
increased by the amount of any Accrual Amount for such Component on previous
Distribution Dates.

     Component Writedown Amount: With respect to any Distribution Date and any
Subordinate Component, the amount by which (i) the sum of the aggregate
Certificate Principal Amount of the related Senior Certificates and the
aggregate Component Principal Amount of each related Component (after giving
effect to distributions of principal and allocation of Realized Losses on such
date) exceeds (ii) the aggregate Scheduled Principal Balance of the Mortgage
Loans in the related Mortgage Pool or Pools for such Distribution Date.

     Control: The meaning specified in Section 8-106 of the UCC.

     Conventional Loan: A Mortgage Loan that is not insured by the United States
Federal Housing Administration or guaranteed by the United States Veterans
Administration.

     Converted Mortgage Loan: None.

     Convertible Mortgage Loan: None.

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

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

     Cooperative Loan Documents: As to any Cooperative Loan, (i) the Cooperative
Shares, together with a stock power in blank; (ii) the original executed
Security Agreement and the assignment of the Security Agreement endorsed in
blank; (iii) the original executed Proprietary Lease and the assignment of the
Proprietary Lease endorsed in blank; (iv) the original executed Recognition
Agreement and the assignment of the Recognition Agreement (or a blanket
assignment of all Recognition Agreements) endorsed in blank; (v) the executed
UCC-1 financing statement with evidence of recording thereon, which has been
filed in all places required to perfect the security interest in the Cooperative
Shares and the Proprietary Lease; and (vi) executed UCC-3 financing statements
(or copies thereof) 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).

     Cooperative Property: The real property and improvements owned by the
Cooperative Corporation, that includes the allocation of individual dwelling
units to the holders of the Cooperative Shares of the Cooperative Corporation.

                                       21
<PAGE>

     Cooperative Shares: Shares issued by a Cooperative Corporation.

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

     Corporate Trust Office: For purposes of Certificate Transfers and surrender
is located at Wells Fargo Bank Minnesota, N.A., Sixth and Marquette Avenue,
Minneapolis, Minnesota 55479, and for all other purposes is located at Wells
Fargo Bank Minnesota, N.A., 11000 Broken Land Parkway, Columbia, Maryland 21044,
Attention: Corporate Trust (SASCO 2001-17).

     Corresponding Class: With respect to any class of Lower Tier Interests, the
Class of Certificates so designated in the Preliminary Statement hereto. With
respect to any Class of Certificates, the class or classes of Lower Tier
Interests so designated in the Preliminary Statement hereto.

     Corresponding Component: With respect to any class of Lower Tier Interests,
the Component so designated in the Preliminary Statement hereto. With respect to
any Component, the class or classes of Lower Tier Interests so designated in the
Preliminary Statement hereto.

     Credit Score: With respect to any Mortgage Loan, a numerical assessment of
default risk with respect to the Mortgagor under such Mortgage Loan, determined
on the basis of a methodology developed by Fair, Isaac & Co., Inc.

     Credit Support Depletion Date: With respect to any Certificate Group, the
Distribution Date on which, after giving effect to all distributions on such
date, the aggregate Component Principal Amount of the related Subordinate
Components is reduced to zero.

     Credit Support Percentage: As to any Component and any Distribution Date,
the sum of the Component Percentages of Components having the same parenthetical
designation that rank lower in priority than such Component.

     Custodial Agreement: Each custodial agreement attached as Exhibit K hereto,
and any custodial agreement subsequently executed by the Trustee substantially
in the form thereof.

     Custodian: Each custodian appointed by the Trustee pursuant to a Custodial
Agreement, and any successor thereto.

     Cut-off Date: November 1, 2001.

     Cut-off Date Aggregate Principal Balance: With respect to the Mortgage
Loans in the Trust Fund on the Closing Date, the Aggregate Principal Balance for
all such Mortgage Loans as of the Cut-off Date.

     Debt Service Reduction: With respect to any Mortgage Loan, a reduction of
the Scheduled Payment that the related Mortgagor is obligated to pay on any Due
Date as a result of any proceeding under Bankruptcy law or any similar
proceeding.

     Deceased Holder: With respect to a Holder of a Redemption Certificate, as
defined in Section 5.06(b).

                                       22
<PAGE>

     Deferred Interest: Not applicable.

     Deficient Valuation: With respect to 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 such Mortgage Loan, which valuation
results from a proceeding under Bankruptcy law or any similar proceeding.

     Definitive Certificate: A Certificate of any Class issued in definitive,
fully registered, certificated form.

     Deleted Mortgage Loan: A Mortgage Loan that is repurchased from the Trust
Fund pursuant to the terms hereof or as to which one or more Qualifying
Substitute Mortgage Loans are substituted therefor.

     Deposit Date: With respect to each Distribution Date, two Business Days
immediately preceding such Distribution Date.

     Depositor: Structured Asset Securities Corporation, a Delaware corporation
having its principal place of business in New York, or its successors in
interest.

     Designated Rate: With respect to Pool 1, 6.80% per annum, with respect to
Pool 2, 6.50% per annum, with respect to Pool 3, 6.50% per annum and with
respect to Pool 4, 7.25% per annum.

     Determination Date: With respect to each Distribution Date, the day of the
latest Remittance Date immediately preceding such Distribution Date.

     Discount Mortgage Loan: With respect to Pool 1, any Mortgage Loan with a
Net Mortgage Rate less than 6.80% per annum, with respect to Pool 2, any
Mortgage Loan with a Net Mortgage Rate less than 6.50%, with respect to Pool 3,
any Mortgage Loan with a Net Mortgage Rate less than 6.50% and with respect to
Pool 4, any Mortgage Loan with a Net Mortgage Rate less than 7.25%.

     Disqualified Organization: A "disqualified organization" as defined in
section 860E(e)(5) of the Code.

     Distribution Date: The 25th day of each month, or, if such 25th day is not
a Business Day, the next succeeding Business Day commencing in December 2001.

     Due Date: With respect to any Mortgage Loan, the date on which a Scheduled
Payment is due under the related Mortgage Note.

     Due Period: With respect to any Distribution Date, the period commencing on
the second day of the month immediately preceding the month in which such
Distribution Date occurs and ending on the first day of the month in which such
Distribution Date occurs.

     Eligible Account: Either (i) an account or accounts maintained with a
federal or state chartered depository institution or trust company acceptable to
the Rating Agencies or (ii) an

                                       23
<PAGE>

account or accounts the deposits in which are insured by the FDIC to the limits
established by such corporation, provided that any such deposits not so insured
shall be maintained in an account at a depository institution or trust company
whose commercial paper or other short term debt obligations (or, in the case of
a depository institution or trust company which is the principal subsidiary of a
holding company, the commercial paper or other short term debt or deposit
obligations of such holding company or depository institution, as the case may
be) have been rated by each Rating Agency in its highest short-term rating
category, or (iii) a segregated trust account or accounts (which shall be a
"special deposit account") maintained with the Trustee or any other federal or
state chartered depository institution or trust company, acting in its fiduciary
capacity, in a manner acceptable to the Trustee and the Rating Agencies.
Eligible Accounts may bear interest.

     Eligible Investments: Any one or more of the following obligations or
securities:

         (i) direct obligations of, and obligations fully guaranteed as to
     timely payment of principal and interest by, the United States of America
     or any agency or instrumentality of the United States of America the
     obligations of which are backed by the full faith and credit of the United
     States of America ("Direct Obligations");

         (ii) federal funds, or demand and time deposits in, certificates of
     deposits of, or bankers' acceptances issued by, any depository institution
     or trust company (including U.S. subsidiaries of foreign depositories and
     the Trustee or any agent of the Trustee, acting in its respective
     commercial capacity) incorporated or organized under the laws of the United
     States of America or any state thereof and subject to supervision and
     examination by federal or state banking authorities, so long as at the time
     of investment or the contractual commitment providing for such investment
     the commercial paper or other short-term debt obligations of such
     depository institution or trust company (or, in the case of a depository
     institution or trust company which is the principal subsidiary of a holding
     company, the commercial paper or other short-term debt or deposit
     obligations of such holding company or deposit institution, as the case may
     be) have been rated by each Rating Agency in its highest short-term rating
     category or one of its two highest long-term rating categories;

         (iii) repurchase agreements collateralized by Direct Obligations or
     securities guaranteed by GNMA, FNMA or FHLMC with any registered
     broker/dealer subject to Securities Investors' Protection Corporation
     jurisdiction or any commercial bank insured by the FDIC, if such
     broker/dealer or bank has an uninsured, unsecured and unguaranteed
     obligation rated by each Rating Agency in its highest short-term rating
     category;

         (iv) securities bearing interest or sold at a discount issued by any
     corporation incorporated under the laws of the United States of America or
     any state thereof which have a credit rating from each Rating Agency, at
     the time of investment or the contractual commitment providing for such
     investment, at least equal to one of the two highest short-term credit
     ratings of each Rating Agency; provided, however, that securities issued by
     any particular corporation will not be Eligible Investments to the extent
     that investment therein will cause the then outstanding principal amount of
     securities issued by such corporation and held as part of the Trust Fund to
     exceed 20% of the sum of the Aggregate

                                       24
<PAGE>

     Principal Balance and the aggregate principal amount of all Eligible
     Investments in the Certificate Account; provided, further, that such
     securities will not be Eligible Investments if they are published as being
     under review with negative implications from either Rating Agency;

         (v) commercial paper (including both non interest-bearing discount
     obligations and interest-bearing obligations payable on demand or on a
     specified date not more than 180 days after the date of issuance thereof)
     rated by each Rating Agency in its highest short-term ratings;

         (vi) a Qualified GIC;

         (vii) certificates or receipts representing direct ownership interests
     in future interest or principal payments on obligations of the United
     States of America or its agencies or instrumentalities (which obligations
     are backed by the full faith and credit of the United States of America)
     held by a custodian in safekeeping on behalf of the holders of such
     receipts; and

         (viii) any other demand, money market fund, common trust fund or time
     deposit or obligation, or interest-bearing or other security or investment
     (including those managed or advised by the Trustee or an Affiliate
     thereof), (A) rated in the highest rating category by each Rating Agency or
     (B) that would not adversely affect the then current rating by either
     Rating Agency of any of the Certificates (in the case of the Class A4
     Certificates, determined without regard to the Class A4 Certificate
     Insurance Policy). Such investments in this subsection (viii) may include
     money market mutual funds or common trust funds, including any other fund
     for which Wells Fargo Bank Minnesota, N.A., ("Wells Fargo"), the Trustee,
     the Master Servicer or an affiliate thereof serves as an investment
     advisor, administrator, shareholder servicing agent, and/or custodian or
     subcustodian, notwithstanding that (x) Wells Fargo, the Master Servicer or
     an affiliate thereof charges and collects fees and expenses from such funds
     for services rendered, (y) Wells Fargo, the Master Servicer or an affiliate
     thereof charges and collects fees and expenses for services rendered
     pursuant to this Agreement, and (z) services performed for such funds and
     pursuant to this Agreement may converge at any time. The Trustee
     specifically authorizes Wells Fargo or an affiliate thereof to charge and
     collect from the Trustee such fees as are collected from all investors in
     such funds for services rendered to such funds (but not to exceed
     investment earnings thereon);

provided, however, that no such instrument shall be an Eligible Investment if
such instrument evidences either (i) a right to receive only interest payments
with respect to the obligations underlying such instrument, or (ii) both
principal and interest payments derived from obligations underlying such
instrument and the principal and interest payments with respect to such
instrument provide a yield to maturity of greater than 120% of the yield to
maturity at par of such underlying obligations, provided that any such
investment will be a "permitted investment" within the meaning of Section
860G(a)(5) of the Code.

     Employee Discount Rate: A rate equal to 0.25% per annum that represents a
reduction in the mortgage interest rate that would have otherwise applied to an
Employee Mortgage Loan but

                                       25
<PAGE>

for the status of the mortgagor as an employee of the Underwriter or any one of
its affiliates, which discount ceases to apply under the terms of an Employee
Mortgage Loan if the mortgagor ceases to be employed by the Underwriter or one
of its affiliates.

     Employee Mortgage Loan: Any Mortgage Loan in Pool 3 or Pool 4 made to an
employee of the Underwriter or any one of its affiliates.

     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 an
Underwriter's Exemption.

     ERISA-Restricted Certificate: Any Class B4, Class B5, Class B6, Class E or
Class P Certificate; any Certificate with a rating below the lowest applicable
rating permitted under the Underwriter's Exemption.

     Escrow Account: Any account established and maintained by the applicable
Servicer pursuant to the applicable Servicing Agreement.

     Euroclear: JP Morgan Chase Bank, Brussels office, as operator of the
Euroclear System.

     Event of Default: Any one of the conditions or circumstances enumerated in
Section 6.14(a).

     Excess Loss: Any Bankruptcy Loss, or portion thereof, in excess of the
then-applicable Bankruptcy Loss Limit, any Fraud Loss, or portion thereof, in
excess of the then-applicable Fraud Loss Limit, and any Special Hazard Loss, or
portion thereof, in excess of the then-applicable Special Hazard Loss Limit.

     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.

     Final Scheduled Distribution Date: For each Class of Group 1, Group 2,
Group 3 and Group 4 Certificates, the Class A4 Certificates and each Class of
Subordinate Certificates, the Distribution Date in December 2031.

     Financial Asset: The meaning specified in Section 8-102(a)(9) of the UCC.

     Financial Intermediary: A broker, dealer, bank or other financial
institution or other Person that clears through or maintains a custodial
relationship with a Clearing Agency Participant.

     Fitch. Fitch, Inc. or any successor in interest.

                                       26
<PAGE>

     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.

     Fraud Loss: Any Realized Loss on a Liquidated Mortgage Loan sustained by
reason of a default arising from fraud, dishonesty or misrepresentation in
connection with the related Mortgage Loan, as reported by the Servicer to the
Master Servicer.

     Fraud Loss Limit: With respect to any Distribution Date (x) prior to the
first anniversary of the Cut-off Date, $2,224,085, $3,010,463,$1,451,216 and
$605,145 for Pool 1, Pool 2, Pool 3 and Pool 4, respectively less the aggregate
of Fraud Losses since the Cut-off Date, (y) on the first and second
anniversaries of the Cut-off Date, an amount equal to the lesser of (1) the
Fraud Loss Limit as of the most recent anniversary of the Cut-off Date and (2)
1% of the aggregate principal balance of all the Mortgage Loans in the related
Mortgage Pool as of the most recent anniversary of the Cut-off Date and (z) on
the third and fourth anniversaries of the Cut-off Date, an amount equal to the
lesser of (1) the Fraud Loss Limit as of the most recent anniversary of the
Cut-off Date and (2) 0.50% of the aggregate principal balance of all the
Mortgage Loans in the related Mortgage Pool as of the most recent anniversary of
the Cut-off Date. On and after the fifth anniversary of the Cut-off Date, the
Fraud Loss Limit shall be zero.

     Global Securities: The global certificates representing the Book-Entry
Certificates.

     GNMA: The Government National Mortgage Association, a wholly owned
corporate instrumentality of the United States within HUD.

     Group 1: All of the Group 1 Certificates.

     Group 1 Certificate: Any Class 1-A1, Class 1-A2, Class 1-A3, Class 1-A5,
Class 1-A6, Class 1-AP or Class 1-AX Certificate and the A4(1) Component of the
Class A4 Certificates.

     Group 2: All of the Group 2 Certificates.

     Group 2 Certificate: Any Class 2-A1, Class 2-A2, Class 2-A3, Class 2-A5,
Class 2-A6, Class 2-A7, Class 2-A8, Class 2-A9, Class 2-A10, Class 2-A11, Class
2-A12, Class 2-AX or Class R Certificate.

     Group 3: All of the Group 3 Certificates.

     Group 3 Certificate: Any Class 3-A1, Class 3-A2, Class 3-A3, Class 3-A5,
Class 3-AP or Class 3-AX Certificate and the A4(3) Component of the Class A4
Certificates.

     Group 4: All of the Group 4 Certificates.

     Group 4 Certificate: Any Class 4-A1, Class 4-A2, Class 4-A3, Class 4-A5,
Class 4-A6, Class 4-A7, Class 4-AP or Class 4-AX Certificate and the A4(4)
Component of the Class A4 Certificates.

                                       27
<PAGE>

     Group 1-4 Subordinate Percentage: shall equal the sum of the Component
Principal Amounts of the B1(1-4), B2(1-4), B3(1-4), B4(1-4), B5(1-4) and B6(1-4)
Components divided by the sum of the Non-AP Pool Balance for Pool 1 and the
Non-AP Pool Balance for Pool 4.

     Group Subordinate Amount: With respect to any Mortgage Pool and any
Distribution Date, the excess of the Non-AP Pool Balance of such Mortgage Pool
for the immediately preceding Distribution Date over the sum of the aggregate of
the Certificate Principal Amounts of the Non-AP Senior Certificates and the
Component Principal Amounts of the senior Components of the related Certificate
Group immediately prior to the related Distribution Date.

     Holder or Certificateholder: The registered owner of any Certificate as
recorded on the books of the Certificate Registrar except that, solely for the
purposes of taking any action or giving any consent pursuant to this Agreement,
any Certificate registered in the name of the Depositor, the Trustee, the Master
Servicer, any Servicer or any Affiliate thereof shall be deemed not to be
outstanding in determining whether the requisite percentage necessary to effect
any such consent has been obtained, except that, in determining whether the
Trustee shall be protected in relying upon any such consent, only Certificates
which a Responsible Officer of the Trustee knows to be so owned shall be
disregarded. The Trustee may request and conclusively rely on certifications by
the Depositor, the Master Servicer and any Servicer in determining whether any
Certificates are registered to an Affiliate of the Depositor, the Master
Servicer or such Servicer.

     HUD: The United States Department of Housing and Urban Development, or any
successor thereto.

     Independent: When used with respect to any Accountants, a Person who is
"independent" within the meaning of Rule 2-01(b) of the Securities and Exchange
Commission's Regulation S-X. When used with respect to any other Person, a
Person who (a) is in fact independent of another specified Person and any
Affiliate of such other Person, (b) does not have any material direct financial
interest in such other Person or any Affiliate of such other Person, and (c) is
not connected with such other Person or any Affiliate of such other Person as an
officer, employee, promoter, underwriter, trustee, partner, director or Person
performing similar functions.

     Individual Redemption Certificate: A Redemption Certificate with a $1,000
Certificate Principal Amount.

     Initial LIBOR Rate: 2.10%.

     Insurance Agreement: The Insurance Agreement dated as of November 1, 2001,
among the Depositor, each Seller, the Trustee and the Certificate Insurer, a
copy of which is attached as Exhibit L hereto.

     Insurance Policy: Any Primary Mortgage Insurance Policy and any standard
hazard insurance policy, flood insurance policy, earthquake insurance policy or
title insurance policy relating to the Mortgage Loans or the Mortgaged
Properties, to be in effect as of the Closing Date or thereafter during the term
of this Agreement.

                                       28
<PAGE>

     Insurance Proceeds: Amounts paid by the insurer under any Insurance Policy
(including the Pool PMI Policy), other than amounts (i) to cover expenses
incurred by or on behalf of the Servicer in connection with procuring such
proceeds, (ii) to be applied to restoration or repair of the related Mortgaged
Property, (iii) required to be paid over to the Mortgagor pursuant to law or the
related Mortgage Note or (iv) to be applied toward payment of any Retained
Interest.

     Insured Payment: The meaning assigned to such term in the Class A4
Certificate Insurance Policy.

     Interest Distribution Amount: Not applicable.

     Interest Shortfall: With respect to any Class of Certificates (other than a
Principal Only Certificate) and any Distribution Date, any Accrued Certificate
Interest not distributed (or added to principal) with respect to any previous
Distribution Date, other than any Net Prepayment Interest Shortfalls.

     Intervening Assignments: The original intervening assignments of the
Mortgage, notice of transfer or equivalent instrument.

     Latest Possible Maturity Date: The Distribution Date in December 25, 2034.

     Lehman Bank: Lehman Brothers Bank, FSB, or any successor in interest.

     Lehman Capital: Lehman Capital, A Division of Lehman Brothers Holdings
Inc., or any successor in interest.

     LIBOR: With respect to the first Accrual Period, the Initial LIBOR Rate.
With respect to each subsequent Accrual Period, the per annum rate determined
pursuant to Section 4.05 on the basis of London interbank offered rate
quotations for one-month Eurodollar deposits, as such quotations may appear on
the display designated as page "LIBOR" on the Bloomberg Financial Markets
Commodities News (or such other page as may replace such page on that service
for the purpose of displaying London interbank offered quotations of major
banks).

     LIBOR Certificate: Any Class 1-A2 or Class 1-A3 Certificate.

     LIBOR Component: None.

     LIBOR Determination Date: The second London Business Day immediately
preceding the commencement of each Accrual Period with respect to any LIBOR
Certificates other than the first such Accrual Period.

     Liquidated Mortgage Loan: Any defaulted Mortgage Loan as to which the
Master Servicer or the applicable Servicer has determined that all amounts that
it expects to recover on behalf of the Trust Fund from or on account of such
Mortgage Loan have been recovered.

     Liquidation Expenses: Expenses that are incurred by the Master Servicer or
a Servicer in connection with the liquidation of any defaulted Mortgage Loan and
are not recoverable under the applicable Primary Mortgage Insurance Policy,
including, without limitation, foreclosure and

                                       29
<PAGE>

rehabilitation expenses, legal expenses and unreimbursed amounts expended
pursuant to Sections 9.06, 9.16 or 9.22.

     Liquidation Proceeds: Cash received in connection with the liquidation of a
defaulted Mortgage Loan, whether through the sale or assignment of such Mortgage
Loan, trustee's sale, foreclosure sale or otherwise, or the sale of the related
Mortgaged Property if the Mortgaged Property is acquired in satisfaction of the
Mortgage Loan, including any amounts remaining in the related Escrow Account.

     Living Holder: Any Holder of a Redemption Certificate other than a Deceased
Holder.

     Loan-to-Value Ratio: With respect to any Mortgage Loan, the ratio of the
principal balance of such Mortgage Loan at origination, or such other date as is
specified, to the Original Value thereof.

     London Business Day: Any day on which banks are open for dealing in foreign
currency and exchange in London, England and New York City.

     Lower Tier Interest: Any one of the classes of lower tier interests
described in the Preliminary Statement hereto.

     Lower Tier Interest Rate: As to each Lower Tier Interest, the applicable
interest rate, if any, as described in the Preliminary Statement hereto.

     Lower Tier REMIC: One of the two separate REMICs as described in the
Preliminary Statement hereto.

     Maintenance: With respect to any Cooperative Unit, the rent or fee paid by
the Mortgagor to the Cooperative Corporation pursuant to the Proprietary Lease.

     Master Servicer: Aurora Loan Services Inc., or any successor in interest,
or if any successor master servicer shall be appointed as herein provided, then
such successor master servicer.

     Master Servicing Fee: As to any Distribution Date, all income and gain
realized from the investment of funds in the Collection Account during the
period from and including the Deposit Date in the calendar month immediately
preceding the month in which such Distribution Date occurs, to but excluding the
Deposit Date relating to such Distribution Date.

     Master Servicing Fee Rate: Not applicable.

     Material Defect: As defined in Section 2.02(c) hereof.

     MERS: Mortgage Electronic Registration Systems, Inc., a Delaware
Corporation, or any successor in interest thereto.

                                       30
<PAGE>

     MERS Mortgage Loan: Any Mortgage Loan as to which the related Mortgage, or
an Assignment of Mortgage, has been or will be recorded in the name of MERS, as
agent for the holder from time to time of the Mortgage Note.

     Moody's: Moody's Investors Service, Inc., or any successor in interest.

     Mortgage: A mortgage, deed of trust or other instrument encumbering a fee
simple interest in real property securing a Mortgage Note, together with
improvements thereto.

     Mortgage File: The mortgage documents listed in Section 2.01(b) pertaining
to a particular Mortgage Loan required to be delivered to the Trustee or a
Custodian pursuant to this Agreement.

     Mortgage Loan: A Mortgage and the related notes or other evidences of
indebtedness secured by each such Mortgage or a manufactured housing contract
conveyed, transferred, sold, assigned to or deposited with the Trustee pursuant
to Section 2.01 or Section 2.05, including without limitation, each Mortgage
Loan listed on the Mortgage Loan Schedule, as amended from time to time.

     Mortgage Loan Sale Agreement: Either of (i) the agreement dated as of
November 1, 2001, for the sale of certain of the Mortgage Loans by Lehman
Capital to the Depositor or (ii) the agreement dated as of November 1, 2001, for
the sale of certain of the Mortgage Loans by Lehman Bank to the Depositor, as
the context requires.

     Mortgage Loan Schedule: The schedule attached hereto as Schedule A, which
shall identify each Mortgage Loan and designate, among other data fields, the
applicable Mortgage Pool in which such Mortgage Loan is included, the Servicer
of such Mortgage Loan and the Retained Interest, if any, applicable to such
Mortgage Loan, as such schedule may be amended from time to time to reflect the
addition of Mortgage Loans to, or the deletion of Mortgage Loans from, the Trust
Fund.

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

     Mortgage Pool: Any of Pool 1, Pool 2, Pool 3 or Pool 4.

     Mortgage Rate: As to any Mortgage Loan, the per annum rate at which
interest accrues on such Mortgage Loan.

     Mortgaged Property: Either of (x) the fee simple interest in real property,
together with improvements thereto including any exterior improvements to be
completed within 120 days of disbursement of the related Mortgage Loan proceeds,
or (y) in the case of a Cooperative Loan, the related Cooperative Shares and
Proprietary Lease, securing the indebtedness of the Mortgagor under the related
Mortgage Loan.

     Mortgagor: The obligor on a Mortgage Note.

     NAS Certificate: Any Class 3-A3 or 4-A7 Certificate.

                                       31
<PAGE>

     NAS Percentage: With respect to each Distribution Date and each Class of
NAS Certificates, the lesser of (i) 100% and (ii) the percentage obtained by
dividing (a) the Class Principal Amount of such Class immediately prior to such
Distribution Date by (b) the Non-AP Mortgage Pool Balance for the related Pool
immediately prior to such Distribution Date.

     NAS Prepayment Shift Percentage: With respect to each Distribution Date
occurring during the five years beginning on the first Distribution Date, 0%.
With respect to each Distribution Date occurring on or after the fifth
anniversary of the first Distribution Date, the following percentage for such
Distribution Date; 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 subsequent Distribution Date,
100%.

     NAS Priority Amount: With respect to each Distribution Date and each Class
of NAS Certificates, an amount equal to the lesser of (i) the sum of (x) the
product of the NAS Percentage for such claim and such Distribution Date, the NAS
Scheduled Principal Percentage for such date and the Scheduled Principal Amount
for the related Mortgage Pool for such date and (y) the product of the related
NAS Percentage for such date, the related NAS Prepayment Shift Percentage for
such date and the Unscheduled Principal Amount for the related Mortgage Pool for
such date, and (ii) the Class Principal Amount of such Certificates immediately
prior to such date.

     NAS Scheduled Principal Percentage: As to any Distribution Date occurring
during the five years beginning on the first Distribution Date, 0%. As to any
Distribution Date occurring on or after the fifth anniversary of the first
Distribution Date, 100%.

     Negative Amortization Certificate: None.

     Net Liquidation Proceeds: With respect to any Liquidated Mortgage Loan, the
related Liquidation Proceeds net of unreimbursed expenses incurred in connection
with liquidation or foreclosure and unreimbursed Advances, Servicing Advances,
Servicing Fees and Retained Interest, if any, received and retained in
connection with the liquidation of such Mortgage Loan.

     Net Mortgage Rate: With respect to any Mortgage Loan, the Mortgage Rate
thereof reduced by the sum of the applicable Servicing Fee Rate, the applicable
Retained Interest Rate, if any, and, if applicable, the premium rate on any
lender-provided mortgage insurance.

     Net Prepayment Interest Shortfall: With respect to each Mortgage Pool and
any Distribution Date, the excess, if any, of any Prepayment Interest Shortfalls
with respect to the Mortgage Loans in such Mortgage Pool for such date over the
sum of any amounts paid by the Servicers with respect to such shortfalls and any
amount that is required to be paid by the Master Servicer in respect of such
shortfalls pursuant to this Agreement.

     Non-AP Percentage: As to any Discount Mortgage Loan, the percentage
equivalent of the fraction, the numerator of which is the Net Mortgage Rate of
such Discount Mortgage Loan and the denominator of which is the applicable
Designated Rate. As to any Non-Discount Mortgage Loan, 100%.

                                       32
<PAGE>

     Non-AP Pool Balance: As to each Pool and any Distribution Date, the sum of
the applicable Non-AP Percentage of the Scheduled Principal Balance of each
Mortgage Loan included in such Mortgage Pool.

     Non-AP Senior Certificate: Any Senior Certificate other than the Class
1-AP, Class 3-AP or Class 4-AP Certificates.

     Non-Book-Entry Certificate: Any Certificate other than a Book-Entry
Certificate.

     Non-Discount Mortgage Loan: With respect to any Mortgage Pool, any Mortgage
Loan with a Net Mortgage Rate equal to or greater than the related Designated
Rate.

     Non-MERS Mortgage Loan: Any Mortgage Loan other than a MERS Mortgage Loan.

     Non-permitted Foreign Holder: As defined in Section 3.03(f).

     Non-U.S. Person: Any person other than (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 prior to such date, may elect to continue
to be U.S. Persons.

     Notice: The notice to be delivered by the Trustee to the Certificate
Insurer with respect to any Distribution Date pursuant to Section 5.07(a), which
shall be in the form attached to the Class A4 Certificate Insurance Policy.

     Notional Amount: With respect to any Notional Certificate and any
Distribution Date, such Certificate's Percentage Interest of the Class Notional
Amount of such Class of Certificates for such Distribution Date.

     Notional Certificate: Any Class 1-A3, Class 1-A6, Class 1-AX, Class 2-A3,
Class 2-A6, Class 2-AX, Class 3-AX, Class 4-A5, Class 4-A6 or Class 4-AX
Certificate.

     Notional Component: Any of the 2-A5(2), 2-A5(3), 2-A5(4) or 2-A5(7)
Components.

     Offering Document: Either of the private placement memorandum dated
November 29, 2001 relating to the Class B4, Class B5 and Class B6 Certificates,
or the Prospectus.

                                       33
<PAGE>

     Officer's Certificate: A certificate signed by the Chairman of the Board,
any Vice Chairman, the President, any Vice President or any Assistant Vice
President of a Person, and in each case delivered to the Trustee.

     Opinion of Counsel: A written opinion of counsel, reasonably acceptable in
form and substance to the Trustee, and who may be in-house or outside counsel to
the Depositor, the Master Servicer or a Servicer but which must be Independent
outside counsel with respect to any such opinion of counsel concerning the
transfer of any Residual Certificate or concerning certain matters with respect
to the Employee Retirement Income Security Act of 1974, as amended ("ERISA"), or
the taxation, or the federal income tax status, of each REMIC. For purpose of
Section 2.01(c)(i), the Opinion of Counsel referred to therein may take the form
of a memorandum of law or other acceptable assurance.

     Original Credit Support Percentage: With respect to each Component, the
Credit Support Percentage for such Component on the Closing Date.

     Original Group Subordinate Amount: As to either Mortgage Pool, the Group
Subordinate Amount for such Mortgage Pool on the Closing Date.

     Original Value: The lesser of (a) the Appraised Value of a Mortgaged
Property at the time the related Mortgage Loan was originated and (b) if the
Mortgage Loan was made to finance the acquisition of the related Mortgaged
Property, the purchase price paid for the Mortgaged Property by the Mortgagor at
the time the related Mortgage Loan was originated.

     PAC Principal Amount: For each Class of PAC Certificates or PAC Component,
and as to each Distribution Date, the amount set forth for such Class or
Component and date in the Scheduled Balances Table.

     PAC Certificate: Any Class 2-A1 or Class 2-A2 Certificate.

     PAC Component: The 2-A5(1) Component.

     Paying Agent: Any paying agent appointed pursuant to Section 3.08.

     Percentage Interest: With respect to any Certificate and the related Class,
such Certificate's percentage interest in the undivided beneficial ownership
interest in the Trust Fund evidenced by all Certificates of the same Class as
such Certificate. With respect to any Certificate other than a Notional
Certificate, the Percentage Interest evidenced thereby shall equal the initial
Certificate Principal Amount thereof divided by the initial Class Principal
Amount of all Certificates of the same Class. With respect to any Notional
Certificate, the Percentage Interest evidenced thereby shall equal the initial
Class Notional Amount thereof divided by the initial Class Notional Amount of
all Certificates of the same Class.

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

     Placement Agent: Lehman Brothers Inc.

                                       34
<PAGE>

     Plan Asset Regulations: The Department of Labor regulations set forth in 29
C.F.R. 2510.3-101.

     Pledged Asset Loan-to-Value Ratio: With respect to any Additional
Collateral Mortgage Loan, (i) the original loan amount less the portion of any
required Additional Collateral which is covered by the Surety Bond, divided by
(ii) the Original Value of the related Mortgaged Property.

     PMI Premium Rate: The per annum rate of premium payment on the Pool PMI
Policy.

     Pool 1: The aggregate of the Mortgage Loans identified on the Mortgage Loan
Schedule as being included in Pool 1.

     Pool 1 Mortgage Loan: Any Mortgage Loan in Pool 1.

     Pool 1 AX Loan: Any Non-Discount Mortgage Loan in Pool 1 excluding any
Retained Interest Mortgage Loan.

     Pool 2: The aggregate of the Mortgage Loans identified on the Mortgage Loan
Schedule as being included in Pool 2.

     Pool 2 AX Loan. Any Non-Discount Mortgage Loan in Pool 2 excluding any
Retained Interest Mortgage Loan.

     Pool 2 Mortgage Loan: Any Mortgage Loan in Pool 2.

     Pool 3: The aggregate of the Mortgage Loans identified on the Mortgage Loan
Schedule as being included in Pool 3.

     Pool 3 AX Loan: Any Non-Discount Mortgage Loan in Pool 3 excluding any
Retained Interest Mortgage Loan.

     Pool 3 Mortgage Loan: Any Mortgage Loan in Pool 3.

     Pool 4: The aggregate of the Mortgage Loans identified on the Mortgage Loan
Schedule as being included in Pool 4.

     Pool 4 AX Loan. Any Non-Discount Mortgage Loan in Pool 4 excluding any
Retained Interest Mortgage Loan.

     Pool 4 Mortgage Loan: Any Mortgage Loan in Pool 4.

     Pool PMI Policy: The primary mortgage insurance policy issued by Mortgage
Guaranty Insurance Corporation with respect to certain Pool 1 Mortgage Loans.

     Prepayment Interest Shortfall: With respect to any Distribution Date and
any Principal Prepayment in part or in full, the difference between (i) one full
month's interest at the applicable Mortgage Rate (giving effect to any
applicable Relief Act Reduction), as reduced by the applicable Servicing Fee
Rate and the applicable Retained Interest Rate, if any, on the

                                       35
<PAGE>

outstanding principal balance of such Mortgage Loan immediately prior to such
prepayment and (ii) the amount of interest actually received with respect to
such Mortgage Loan in connection with such Principal Prepayment.

     Prepayment Interest Excess: With respect to any Distribution Date and any
Principal Prepayment in full received on the Mortgage Loans on the first day of
the calendar month during which such Distribution Date occurs, all amounts paid
in respect of interest at the applicable Net Mortgage Rate on such Principal
Prepayment less one month's interest.

     Prepayment Penalty Amounts: With respect to any Distribution Date, all
premiums or charges paid by the obligors under the related Mortgage Notes due to
Principal Prepayments collected by the Servicers during the immediately
preceding Prepayment Period.

     Prepayment Period: With respect to any Distribution Date, the period
commencing on the second day of the calendar month immediately preceding the
month in which such Distribution Date occurs and ending on the first day of the
calendar month in which such Distribution Date occurs.

     Primary Mortgage Insurance Policy: Mortgage guaranty insurance, if any, on
an individual Mortgage Loan, as evidenced by a policy or certificate, including
the Pool PMI Policy.

     Principal Amount Schedules: Not applicable.

     Principal Only Certificate: Any Class 1-AP, Class 3-A5, Class 3-AP or Class
4-AP Certificate.

     Principal Only Component: The 2-A5(6) Component.

     Principal Prepayment: Any Mortgagor payment of principal (other than a
Balloon Payment) or other recovery of principal on a Mortgage Loan that is
recognized as having been received or recovered in advance of its scheduled Due
Date and applied to reduce the principal balance of the Mortgage Loan in
accordance with the terms of the Mortgage Note or the applicable Servicing
Agreement.

     Proceeding: Any suit in equity, action at law or other judicial or
administrative proceeding.

     Proprietary Lease: With respect to any Cooperative Unit, a lease or
occupancy agreement between a Cooperative Corporation and a holder of related
Cooperative Shares.

     Prospectus: The prospectus supplement dated November 29, 2001, together
with the accompanying prospectus dated November 26, 2001, relating to each Class
of Certificates other than the Class B4, Class B5, Class B6, Class E and Class P
Certificates.

     Purchase Price: With respect to the repurchase of a Mortgage Loan pursuant
to this Agreement, an amount equal to the sum of (a) 100% of the unpaid
principal balance of such Mortgage Loan, (b) accrued interest thereon at the
Mortgage Rate, from the date as to which

                                       36
<PAGE>

interest was last paid to (but not including) the Due Date immediately preceding
the related Distribution Date and (c) any unreimbursed Servicing Advances with
respect to such Mortgage Loan. The Certificate Insurer shall be reimbursed from
the Purchase Price for any unpaid Reimbursement Amount due to the Certificate
Insurer with respect to such repurchased Mortgage Loan. The Master Servicer or
the applicable Servicer (or the Trustee, if applicable) shall be reimbursed from
the Purchase Price for any Mortgage Loan or related REO Property for any
Advances made with respect to such Mortgage Loan that are reimbursable to the
Master Servicer, such Servicer or the Trustee under this Agreement or the
related Servicing Agreement, as well as any unreimbursed Servicing Advances and
accrued and unpaid Master Servicing Fees or Servicing Fees, as applicable.

     QIB: As defined in Section 3.03(c).

     Qualified GIC: A guaranteed investment contract or surety bond providing
for the investment of funds in the Collection Account or the Certificate Account
and insuring a minimum, fixed or floating rate of return on investments of such
funds, which contract or surety bond shall:

     (a) be an obligation of an insurance company or other corporation whose
long-term debt is rated by each Rating Agency in one of its two highest rating
categories or, if such insurance company has no long-term debt, whose claims
paying ability is rated by each Rating Agency in one of its two highest rating
categories, and whose short-term debt is rated by each Rating Agency in its
highest rating category;

     (b) provide that the Trustee may exercise all of the rights under such
contract or surety bond without the necessity of taking any action by any other
Person;

     (c) provide that if at any time the then current credit standing of the
obligor under such guaranteed investment contract is such that continued
investment pursuant to such contract of funds would result in a downgrading of
any rating of the Certificates (which in the case of the Class A4 Certificates
is determined without regard to the Class A4 Certificate Insurance Policy), the
Trustee shall terminate such contract without penalty and be entitled to the
return of all funds previously invested thereunder, together with accrued
interest thereon at the interest rate provided under such contract to the date
of delivery of such funds to the Trustee;

     (d) provide that the Trustee's interest therein shall be transferable to
any successor trustee hereunder; and

     (e) provide that the funds reinvested thereunder and accrued interest
thereon be returnable to the Collection Account or the Certificate Account, as
the case may be, not later than the Business Day prior to any Distribution Date.

     Qualified Insurer: An insurance company duly qualified as such under the
laws of the states in which the related Mortgaged Properties are located, duly
authorized and licensed in such states to transact the applicable insurance
business and to write the insurance provided and whose claims paying ability is
rated by each Rating Agency in its highest rating category or whose selection as
an insurer will not adversely affect the rating of the Certificates (which in
the

                                       37
<PAGE>

case of the Class A4 Certificates is determined without regard to the Class A4
Certificate Insurance Policy).

     Qualifying Substitute Mortgage Loan: In the case of a Mortgage Loan
substituted for a Deleted Mortgage Loan, a Mortgage Loan that, on the date of
substitution, (i) has a Scheduled Principal Balance (together with that of any
other mortgage loan substituted for the same Deleted Mortgage Loan) as of the
Due Date in the month in which such substitution occurs not in excess of the
Scheduled Principal Balance of the related Deleted Mortgage Loan; provided,
however, that, to the extent that the Scheduled Principal Balance of such
Mortgage Loan is less than the Scheduled Principal Balance of the related
Deleted Mortgage Loan, then such differential in principal amount, together with
interest thereon at the applicable Mortgage Rate net of the Master Servicing Fee
and the applicable Servicing Fee from the date as to which interest was last
paid through the end of the Due Period in which such substitution occurs, shall
be paid by the party effecting such substitution to the Trustee for deposit into
the Certificate Account, and shall be treated as a Principal Prepayment
hereunder; (ii) has a Net Mortgage Rate not lower than the Net Mortgage Rate of
the related Deleted Mortgage Loan and will be a Discount Mortgage Loan if the
Deleted Mortgage Loan was a Discount Mortgage Loan or a Non-Discount Mortgage
Loan if the Deleted Mortgage Loan was a Non-Discount Mortgage Loan; (iii) has a
remaining stated term to maturity not longer than, and not more than one year
shorter than, the remaining term to stated maturity of the related Deleted
Mortgage Loan; (iv) (A) has a Loan-to-Value Ratio as of the date of such
substitution of not greater than 80%; provided, however, that if the related
Deleted Mortgage Loan has a Loan-to-Value Ratio of greater than 80%, then the
Loan-to-Value Ratio of such substitute Mortgage Loan may be greater than 80% but
shall not be greater than the Loan-to-Value Ratio of the related Deleted
Mortgage Loan and (B) the addition of such substitute Mortgage Loan does not
increase the weighted average Loan-to-Value Ratio of the related Mortgage Pool
by more than 5%; (v) will comply with all of the representations and warranties
relating to Mortgage Loans set forth herein, as of the date as of which such
substitution occurs; (vi) is not a Cooperative Loan unless the related Deleted
Mortgage Loan was a Cooperative Loan; (vii) if applicable, has the same index as
and a margin not less than that of the related Deleted Mortgage Loan; (viii) has
not been delinquent for a period of more than 30 days more than once in the
twelve months immediately preceding such date of substitution; (ix) is covered
by a Primary Mortgage Insurance Policy if the related Deleted Mortgage Loan is
so covered, and the Loan-to-Value Ratio of such Mortgage Loan is greater than
80%; and (x) has a Credit Score not greater than 20 points lower than the Credit
Score of the related Deleted Mortgage Loan; provided, however, that if the
Deleted Mortgage Loan does not have a Credit Score, then such substitute
Mortgage Loan shall have a Credit Score equal to or greater than 700. In the
event that either one mortgage loan is substituted for more than one Deleted
Mortgage Loan or more than one mortgage loan is substituted for one or more
Deleted Mortgage Loans, then (a) the Scheduled Principal Balance referred to in
clause (i) above shall be determined such that the aggregate Scheduled Principal
Balance of all such substitute Mortgage Loans shall not exceed the aggregate
Scheduled Principal Balance of all Deleted Mortgage Loans and (b) each of (1)
the rate referred to in clause (ii) above, (2) the remaining term to stated
maturity referred to in clause (iii) above, (3) the Loan-to-Value Ratio referred
to in clause (iv) above and (4) the Credit Score referred to in clause (x) above
shall be determined on a weighted average basis, provided that the final
scheduled maturity date of any Qualifying Substitute Mortgage Loan shall not
exceed the Final Scheduled Distribution Date of any Class of Certificates.
Whenever a Qualifying Substitute Mortgage Loan is substituted for a Deleted
Mortgage Loan pursuant to this

                                       38
<PAGE>

Agreement, the party effecting such substitution shall certify such
qualification in writing to the Trustee.

     Rating Agency: Each of S&P and Fitch.

     Realized Loss: (a) with respect to each Liquidated Mortgage Loan, an amount
equal to (i) the unpaid principal balance of such Mortgage Loan as of the date
of liquidation, plus (ii) interest at the applicable Net Mortgage Rate from the
date as to which interest was last paid up to the last day of the month of such
liquidation, minus (iii) Liquidation Proceeds received, net of amounts that are
reimbursable to the Master Servicer or the applicable Servicer with respect to
such Mortgage Loan (other than Advances of principal and interest) including
expenses of liquidation, and (b) with respect to each Mortgage Loan that has
become the subject of a Deficient Valuation, the difference between the unpaid
principal balance of such Mortgage Loan immediately prior to such Deficient
Valuation and the unpaid principal balance of such Mortgage Loan as reduced by
the Deficient Valuation. In determining whether a Realized Loss on a Liquidated
Mortgage Loan is a Realized Loss of interest or principal, Liquidation Proceeds
shall be allocated, first, to payment of expenses related to such Liquidated
Mortgage Loan (including payment of any Retained Interest), then to accrued
unpaid interest and finally to reduce the principal balance of the Mortgage
Loan.

     Recognition Agreement: With respect to any Cooperative Loan, an agreement
between the related Cooperative Corporation and the originator of such Mortgage
Loan to establish the rights of such originator in the related Cooperative
Property.

     Record Date: With respect to any Distribution Date and each Class of
Certificates other than any LIBOR Certificates, the close of business on the
last Business Day of the month immediately preceding the month in which such
Distribution Date occurs; and with respect to any LIBOR Certificates, the day
immediately preceding the related Distribution Date.

     Redemption Certificate: Any Class A4 Certificate. Reference Banks: As
defined in Section 4.05.

     Regulation S: Regulation S promulgated under the Act or any successor
provision thereto, in each case as the same may be amended from time to time;
and all references to any rule, section or subsection of, or definition or term
contained in, Regulation S means such rule, section, subsection, definition or
term, as the case may be, or any successor thereto, in each case as the same may
be amended from time to time.

     Regulation S Global Security: The meaning specified in Section 3.01(c).

     Reimbursement Amount: As defined in Section 5.02(a)(vii).

     Relevant UCC: The Uniform Commercial Code as in effect in the applicable
jurisdiction.

     Relief Act Reduction: With respect to any Mortgage Loan as to which there
has been a reduction in the amount of interest collectible thereon as a result
of application of the Solders' and Sailors' Civil Relief Act of 1940, as
amended, any amount by which interest collectible on

                                       39
<PAGE>

such Mortgage Loan for the Due Date in the related Due Period is less than
interest accrued thereon for the applicable one-month period at the Mortgage
Rate without giving effect to such reduction.

     REMIC: Each of the Lower Tier REMIC and the Upper Tier REMIC, as described
in the Preliminary Statement hereto.

     REMIC Provisions: The provisions of the federal income tax law relating to
real estate mortgage investment conduits, which appear at sections 860A through
86OG of the Code, and related provisions, and regulations, including proposed
regulations and rulings, and administrative pronouncements promulgated
thereunder, as the foregoing may be in effect from time to time.

     Remittance Date: The day in each month on which each Servicer is required
to remit payments to the account maintained by the Master Servicer, as specified
in the related Servicing Agreement, which is the 18th day of each month (or if
such 18th day is not a Business Day, the next succeeding Business Day).

     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 or otherwise treated as having been acquired pursuant to the REMIC
Provisions.

     Reserve Interest Rate: As defined in Section 4.05.

     Residual Certificate: Any Class R Certificate.

     Responsible Officer: When used with respect to the Trustee, any Vice
President, Assistant Vice President, the Secretary, any assistant secretary, the
Treasurer, or any assistant treasurer, working in its corporate trust department
and having direct responsibility for the administration of this Agreement.

     Restricted Certificate: Any Class B4, Class B5, Class B6, Class E or Class
P Certificate and any Restricted Global Security.

     Restricted Global Security: The meaning specified in Section 3.01(c).

     Retained Interest: Interest in respect of each Retained Interest Mortgage
Loan, retained in each case by the Retained Interest Holder at the Retained
Interest Rate.

     Retained Interest Mortgage Loan: Each Mortgage Loan listed on Schedule B
hereto.

     Retained Interest Holder: With respect to each Retained Interest Mortgage
Loan, the related Seller thereof or any successor in interest by assignment or
otherwise.

     Retained Interest Rate: With respect to each Retained Interest Mortgage
Loan, the excess of the Mortgage Rate of such Mortgage Loan over the applicable
Trust Rate.

                                       40
<PAGE>

     Rounding Account: The separate Eligible Account established and maintained
by the Trustee pursuant to Section 5.06(e) in the name of the Trustee for the
benefit of the Class A4 Certificateholders and designated "Wells Fargo Bank
Minnesota, National Association, Rounding Account in trust for registered
holders of Structured Asset Securities Corporation Mortgage Pass-Through
Certificates, Series 2001-17, Class A4." Funds in the Rounding Account shall be
held in trust for the benefit of the Class A4 Certificateholders for the uses
and purposes set forth in this Agreement. The Rounding Account shall not be a
part of any REMIC and, for all federal and state income tax purposes, shall be
beneficially owned by Lehman Brothers Inc.

     S&P: Standard & Poor's Ratings Service, a division of The McGraw-Hill
Companies, Inc., or any successor in interest.

     Scheduled Amount: Not applicable.

     Scheduled Balances Tables: The tables attached as Exhibit P hereto that set
forth the PAC Amounts for the PAC Certificates and PAC Components and TAC
Amounts for the TAC Certificates and the TAC Component.

     Scheduled Certificate: None.

     Scheduled Component: None.

     Scheduled Payment: Each scheduled payment of principal and interest (or of
interest only, if applicable) to be paid by the Mortgagor on a Mortgage Loan, as
reduced (except where otherwise specified herein) by the amount of any related
Debt Service Reduction (excluding all amounts of principal and interest that
were due on or before the Cut-off Date whenever received) and, in the case of an
REO Property, an amount equivalent to the Scheduled Payment that would have been
due on the related Mortgage Loan if such Mortgage Loan had remained in
existence. In the case of any bi-weekly payment Mortgage Loan, all payments due
on such Mortgage Loan during any Due Period shall be deemed collectively to
constitute the Scheduled Payment due on such Mortgage Loan in such Due Period.

     Scheduled Principal Amount: With respect to each Distribution Date and any
Mortgage Pool, the amount described in clause (i) of the definition of Senior
Principal Distribution Amount with respect to such Mortgage Pool (without
application of the related Senior Percentage).

     Scheduled Principal Balance: With respect to (i) any Mortgage Loan as of
any Distribution Date, the principal balance of such Mortgage Loan at the close
of business on the Cut-off Date, after giving effect to principal payments due
on or before the Cut-off Date, whether or not received, less an amount equal to
principal payments due after the Cut-off Date and on or before the Due Date in
the related Due Period, whether or not received from the Mortgagor or advanced
by the applicable Servicer or the Master Servicer, and all amounts allocable to
unscheduled principal payments (including Principal Prepayments, Net Liquidation
Proceeds, Insurance Proceeds and condemnation proceeds, in each case to the
extent identified and applied prior to or during the applicable Prepayment
Period) and (ii) any REO Property as of any Distribution Date, the Scheduled
Principal Balance of the related Mortgage Loan on the Due Date immediately
preceding the date of acquisition of such REO Property by or on behalf of the

                                       41
<PAGE>

Trustee (reduced by any amount applied as a reduction of principal on the
Mortgage Loan). With respect to any Mortgage Loan as of the Cut-off Date, as
specified in the Mortgage Loan Schedule.

     Security Agreement: With respect to any Cooperative Loan, the agreement
between the owner of the related Cooperative Shares and the originator of the
related Mortgage Note that defines the terms of the security interest in such
Cooperative Shares and the related Proprietary Lease.

     Security Entitlement: The meaning specified in Section 8-102(a)(17) of the
UCC.

     Seller: Either of (i) Lehman Capital or any successor in interest or (ii)
Lehman Bank or any successor in interest, as the context may require.

     Senior Certificate: Any Class of Certificates which includes the letter "A"
in its Class description or Class R Certificate.

     Senior Percentage: With respect to each Mortgage Pool and any Distribution
Date, the percentage equivalent of a fraction, the numerator of which is the sum
of the Class Principal Amounts of each Class of Senior Certificates (other than
any Notional Certificate and the Class A4, Class 1-AP, Class 2-A5, Class 3-AP
and Class 4-AP Certificates) and the Component Principal Amounts of each
Component of each Class of Senior Certificates comprising Components (other than
any Notional Component or the 2-A5(6) Component), in each case relating to such
Mortgage Pool, immediately prior to such Distribution Date and the denominator
of which is the related Non-AP Pool Balance for the immediately preceding
Distribution Date.

     Senior Prepayment Percentage: With respect to each Mortgage Pool and any
Distribution Date occurring during the five years beginning on the first
Distribution Date, 100%. With respect to each Mortgage Pool and for any
Distribution Date occurring on or after the fifth anniversary of the first
Distribution Date, the related Senior Percentage plus the following percentage
of the related Subordinate Percentage for such Distribution Date: for any
Distribution Date in the first year thereafter, 70%; for any Distribution Date
in the second year thereafter, 60%; for any Distribution Date in the third year
thereafter, 40%; for any Distribution Date in the fourth year thereafter, 20%;
and for any subsequent Distribution Date, 0%; provided, however, that if on any
of the foregoing Distribution Dates the Senior Percentage for any Mortgage Pool
exceeds the initial Senior Percentage for such Mortgage Pool, the Senior
Prepayment Percentage for any Mortgage Pool for such Distribution Date shall
once again equal 100% for such Distribution Date and if the Mortgage Pool is
Pool 1 or Pool 4, the Senior Prepayment Percentages for both Pool 1 and Pool 4
will once again equal 100%.

     Notwithstanding the foregoing, no decrease in the Senior Prepayment
Percentage for any Mortgage Pool below the level in effect for the most recent
prior period set forth in the paragraph above shall be effective on any
Distribution Date if, as of the first Distribution Date as to which any such
decrease applies, (i) the average outstanding principal balance on such
Distribution Date and for the preceding five Distribution Dates of all Mortgage
Loans in such Mortgage Pool that were delinquent 60 days or more (including for
this purpose any Mortgage Loans in foreclosure and the Scheduled Payments that
would have been due on Mortgage Loans with

                                       42
<PAGE>

respect to which the related Mortgaged Property has been acquired by the Trust
Fund if the related Mortgage Loan had remained in existence) is greater than or
equal to 50% of the applicable Group Subordinate Amount immediately prior to
such Distribution Date or (ii) cumulative Realized Losses with respect to the
Mortgage Loans in any Mortgage Pool exceed (a) with respect to the Distribution
Date on the fifth anniversary of the first Distribution Date, 30% of the related
Original Group Subordinate Amount, (b) with respect to the Distribution Date on
the sixth anniversary of the first Distribution Date, 35% of the related
Original Group Subordinate Amount, (c) with respect to the Distribution Date on
the seventh anniversary of the first Distribution Date, 40% of the related
Original Group Subordinate Amount, (d) with respect to the Distribution Date on
the eighth anniversary of the first Distribution Date, 45% of the related
Original Group Subordinate Amount, and (e) with respect to the Distribution Date
on the ninth anniversary of the first Distribution Date or thereafter, 50% of
the related Original Group Subordinate Amount. After the Class Principal Amount
of each Class of Senior Certificates and the Component Principal Amount of the
related Components in any Certificate Group has been reduced to zero, the Senior
Prepayment Percentage for the related Mortgage Pool shall be 0%.

     Senior Principal Distribution Amount: For each Certificate Group and any
Distribution Date, the sum of the following amounts:

         (i) the product of (1) the related Senior Percentage for such date and
     (2) the principal portion (multiplied by the applicable Non-AP Percentage)
     of each Scheduled Payment (without giving effect to any Debt Service
     Reduction occurring prior to the Bankruptcy Coverage Termination Date), on
     each Mortgage Loan in the related Mortgage Pool due during the related Due
     Period;

         (ii) the product of (a) the related Senior Prepayment Percentage for
     such date and (b) each of the following amounts (multiplied by the
     applicable Non-AP Percentage): (1) each Principal Prepayment on the
     Mortgage Loans in the related Mortgage Pool collected during the related
     Prepayment Period, (2) each other unscheduled collection, including
     Insurance Proceeds and Net Liquidation Proceeds (other than with respect to
     any Mortgage Loan in the related Mortgage Pool that was finally liquidated
     during the related Prepayment Period) representing or allocable to
     recoveries of principal received during the related Prepayment Period, and
     (3) the principal portion of all proceeds of the purchase of any Mortgage
     Loan in the related Mortgage Pool (or, in the case of a permitted
     substitution, amounts representing a principal adjustment) actually
     received by the Trustee during the related Prepayment Period;

         (iii) with respect to unscheduled recoveries allocable to principal of
     any Mortgage Loan in the related Mortgage Pool that was finally liquidated
     during the related Prepayment Period, the lesser of (a) the related net
     Liquidation Proceeds allocable to principal (multiplied by the applicable
     Non-AP Percentage) and (b) the product of the related Senior Prepayment
     Percentage for such date and the Scheduled Principal Balance (multiplied by
     the applicable Non-AP Percentage) of such related Mortgage Loan at the time
     of liquidation; and

         (iv) any amounts described in clauses (i) through (iii) for any
     previous Distribution Date that remain unpaid.

                                       43
<PAGE>

If on any Distribution Date the Class Principal Amount of each Class of Senior
Certificates (other than any Class AP Certificates) and the Component Principal
Amount of the related Component in any Certificate Group has been reduced to
zero, the Senior Principal Distribution Amount for such Certificate Group for
such date (following such reduction) and each subsequent Distribution Date shall
be zero.

     Senior Principal Priorities: The priorities for distribution of principal
to the Senior Certificates and Components as set forth in Exhibit O.

     Servicer: Any Servicer that has entered into any of the Servicing
Agreements attached as Exhibit E hereto, or any successors in interest.

     Servicing Advances: Expenditures incurred by the Servicer in connection
with the liquidation or foreclosure of a Mortgage Loan which are eligible for
reimbursement under the Servicing Agreement.

     Servicing Agreement: Each Servicing Agreement between a Servicer and the
related Seller dated as of November 1, 2001, attached hereto in Exhibit E, and
any other servicing agreement entered into between a successor servicer and the
related Seller or the Trustee pursuant to the terms hereof.

     Servicing Fee: The Servicing Fee specified in the applicable Servicing
Agreement.

     Servicing Fee Rate: With respect to any Servicer, as specified in the
applicable Servicing Agreement.

     Servicing Officer: Any officer of the Master Servicer involved in or
responsible for the administration and servicing or master servicing of the
Mortgage Loans whose name appears on a list of servicing officers furnished by
the Master Servicer to the Trustee, as such list may from time to time be
amended.

     Special Hazard Loss: With respect to the Mortgage Loans, (x) any Realized
Loss arising out of any direct physical loss or damage to a Mortgaged Property
which is caused by or results from any cause, exclusive of any loss covered by a
hazard policy or a flood insurance policy required to be maintained in respect
of such Mortgaged Property and any loss caused by or resulting from (i) normal
wear and tear, (ii) conversion or other dishonest act on the part of the
Trustee, the Master Servicer, any Servicer or any of their agents or employees,
or (iii) errors in design, faulty workmanship or faulty materials, unless the
collapse of the property or a part thereof ensues, or (y) any Realized Loss
arising from or related to the presence or suspected presence of hazardous
wastes, or hazardous substances on a Mortgaged Property unless such loss is
covered by a hazard policy or flood insurance policy required to be maintained
in respect of such Mortgaged Property, in any case, as reported by any Servicer
to the Master Servicer.

     Special Hazard Loss Limit: As of the Cut-off Date, $4,000,000, $3,010,463,
$5,196,236 and $5,200,000 for Pool 1, Pool 2, Pool 3 and Pool 4, respectively,
which amounts shall be reduced from time to time to an amount equal on any
Distribution Date to the lesser of (a) the greatest of (i) 1% of the aggregate
Scheduled Principal Balance of the Mortgage Loans in the related Mortgage Pool;
(ii) twice the Scheduled Principal Balance of the Mortgage Loan in the

                                       44
<PAGE>

related Mortgage Pool having the highest Scheduled Principal Balance, and (iii)
the aggregate Scheduled Principal Balance of the Mortgage Loans in the related
Mortgage Pool secured by Mortgaged Properties located in the single California
postal zip code area having the highest aggregate Scheduled Principal Balance of
Mortgage Loans in the related Mortgage Pool of any such postal zip code area and
(b) the Special Hazard Loss Limit as of the Closing Date less the amount, if
any, of Special Hazard Losses incurred with respect to Mortgage Loans since the
Closing Date.

     Specified Rating: Not applicable.

     Startup Day: The day designated as such pursuant to Section 10.01(b)
hereof.

     Subordinate Certificate: Any Class B Certificate.

     Subordinate Component: Any Component of a Class B Certificate.

     Subordinate Component Percentage: With respect to any Distribution Date and
each Subordinate Component, the percentage obtained by dividing the Component
Principal Amount of such Subordinate Component immediately prior to such
Distribution Date by the aggregate Component Principal Amounts of all
Subordinate Components having the same parenthetical designation immediately
prior to such Distribution Date.

     Subordinate Percentage: With respect to each Mortgage Pool and any
Distribution Date, the difference between 100% and the related Senior Percentage
for such Distribution Date.

     Subordinate Prepayment Percentage: With respect to each Mortgage Pool and
any Distribution Date, the difference between 100% and the related Senior
Prepayment Percentage for such Distribution Date.

     Subordinate Principal Distribution Amount: For each Certificate Group and
any Distribution Date, the sum of the following:

         (i) the product of (1) the related Subordinate Percentage for such date
     and (2) the principal portion (multiplied by the applicable Non-AP
     Percentage) of each Scheduled Payment (without giving effect to any Debt
     Service Reduction occurring prior to the applicable Bankruptcy Coverage
     Termination Date) on each Mortgage Loan in the related Mortgage Pool due
     during the related Due Period;

         (ii) the product of (a) the related Subordinate Prepayment Percentage
     for such date and (b) each of the following amounts (multiplied by the
     applicable Non-AP Percentage): (1) each Principal Prepayment on the
     Mortgage Loans in the related Mortgage Pool collected during the related
     Prepayment Period, (2) each other unscheduled collection, including
     Insurance Proceeds and Net Liquidation Proceeds (other than with respect to
     any Mortgage Loan in the related Mortgage Pool that was finally liquidated
     during the related Prepayment Period) representing or allocable to
     recoveries of principal received during the related Prepayment Period, and
     (3) the principal portion of all proceeds of the purchase of any Mortgage
     Loan in the related Mortgage Pool (or, in the case of a permitted
     substitution, amounts representing a

                                       45
<PAGE>

     principal adjustment) actually received by the Trustee during the related
     Prepayment Period;

         (iii) with respect to unscheduled recoveries allocable to principal of
     any Mortgage Loan in the related Mortgage Pool that was finally liquidated
     during the related Prepayment Period, the related net Liquidation Proceeds
     allocable to principal (multiplied by the applicable Non-AP Percentage)
     less any related amount paid pursuant to subsection (iii) of the definition
     of Senior Principal Distribution Amount for the related Certificate Group;
     and

         (iv) any amounts described in clauses (i) through (iii) for any
     previous Distribution Date that remain unpaid.

     Surety Bond: The Limited Purpose Surety Bond (Policy No. 09-700-4-2558),
dated November 30, 2001, issued by the Surety for the benefit of certain
beneficiaries, including the Trustee for the benefit of the Holders of the
Certificates, but only to the extent that such Limited Purpose Surety Bond
covers any Pledged Asset Mortgage Loans.

     TAC Certificate: Any Class 2-A7, Class 2-A8, Class 2-A9 or Class 2-A10
Certificate.

     TAC Component: The 2-A5(5) Component.

     TAC Principal Amount: For each Class of TAC Certificates and Component, and
as to each Distribution Date, the amount set forth for such Class or Component
and date under the applicable TAC Schedule in the Scheduled Balances Tables.

     Tax Matters Person: The "tax matters person" as specified in the REMIC
Provisions.

     Termination Price: As defined in Section 7.01 hereof.

     Title Insurance Policy: A title insurance policy maintained with respect to
a Mortgage Loan.

     Transfer Agreement: As defined in the related Mortgage Loan Sale Agreement.

     Transferor: Each seller of Mortgage Loans to Lehman Capital or Lehman Bank,
as applicable, pursuant to a Transfer Agreement.

     Trust Fund: The corpus of the trust created pursuant to this Agreement,
consisting of the Mortgage Loans (other than any Retained Interest), the
assignment of the Depositor's rights under the related Mortgage Loan Sale
Agreement, such amounts as shall from time to time be held in the Collection
Account, the Certificate Account, any Escrow Account, the Insurance Policies,
any REO Property, the Class A4 Certificate Insurance Policy, the Class A4
Reserve Fund, the Rounding Account, the Class A4 Policy Payments Account and the
other items referred to in, and conveyed to the Trustee under, Section 2.01(a).

     Trust Rate: With respect to each Mortgage Loan, the sum of (i) the related
Designated Rate, (ii) the applicable Servicing Fee Rate, (iii) the premium rate
on any lender-provided

                                       46
<PAGE>

mortgage insurance, (iv) if applicable, the PMI Premium Rate and (v) in the case
of any Employee Mortgage Loan, the Employee Discount Rate, if applicable.

     Trustee: Wells Fargo Bank Minnesota, N.A., not in its individual capacity
but solely as Trustee, or any successor in interest, or if any successor trustee
or any co-trustee shall be appointed as herein provided, then such successor
trustee and such co-trustee, as the case may be.

     UCC: The Uniform Commercial Code as adopted in the State of New York.

     Undercollateralization Distribution: As defined in Section 5.02(f)(i).

     Undercollateralized Group: With respect to any Distribution Date, the
Non-AP Senior Certificates and the senior Components of any Certificate Group as
to which the sum of the aggregate Certificate Principal Amount and Component
Principal Amount thereof, after giving effect to distributions pursuant to
Section 5.02 on such date is greater than the Non-AP Pool Balance of the related
Mortgage Pool for such Distribution Date.

     Underwriter: Lehman Brothers, Inc.

     Underwriter's Exemption: Prohibited Transaction Exemption 2000-58, 65 Fed.
Reg. 67765 (2000), as amended (or any successor thereto), or any substantially
similar administrative exemption granted by the U.S. Department of Labor.

     Unscheduled Principal Amount: With respect to each Distribution Date and
any Mortgage Pool, the amount described in clauses (ii) and (iii) (without
application of the related Senior Prepayment Percentage) of the definition of
Senior Principal Distribution Amount with respect to such Mortgage Pool.

     Upper Tier REMIC: One of the two separate REMICs as described in the
Preliminary Statement hereto.

     Voting Interests: The portion of the voting rights of all the Certificates
that is allocated to any Certificate for purposes of the voting provisions of
this Agreement. At all times during the term of this Agreement until the Class
Notional Amount of each Class of Notional Certificates has been reduced to zero,
94% of all Voting Interests shall be allocated to the Certificates other than
the Notional Certificates, the Class E Certificates and the Class P Certificates
will each be allocated 0.5% of all Voting Interests and 5% of all Voting
Interests shall be allocated to the Notional Certificates. After the Class
Notional Amount of each Class of Notional Certificate has been reduced to zero,
100% of all Voting Interests shall be allocated to the remaining Classes of
Certificates. Voting Interests allocated to the Notional Certificates shall be
allocated among the Classes of such Certificates (and among the Certificates of
each such Class) in proportion to their Class Notional Amounts (or Notional
Amounts). Voting Interests shall be allocated among the other Classes of
Certificates (and among the Certificates of each such Class) in proportion to
their Class Principal Amounts (or Certificate Principal Amounts); provided,
however, that on and after the date, if any, on which the Certificate Insurer
has paid a claim under the Class A4 Certificate Insurance Policy in respect of
the Class A4 Certificates, the Certificate Insurer shall be entitled to exercise
all consent, voting and related rights of such class.

                                       47
<PAGE>

     Section 1.02. Calculations Respecting Mortgage Loans.

     Calculations required to be made pursuant to this Agreement with respect to
any Mortgage Loan in the Trust Fund shall be made based upon current information
as to the terms of the Mortgage Loans and reports of payments received from the
Mortgagor on such Mortgage Loans and payments to be made to the Trustee as
supplied to the Trustee by the Master Servicer. The Trustee shall not be
required to recompute, verify or recalculate the information supplied to it by
the Master Servicer.

                                   ARTICLE II

                              DECLARATION OF TRUST;
                            ISSUANCE OF CERTIFICATES

     Section 2.01. Creation and Declaration of Trust Fund; Conveyance of
Mortgage Loans.

     (a) Concurrently with the execution and delivery of this Agreement, the
Depositor does hereby transfer, assign, set over, deposit with and otherwise
convey to the Trustee, without recourse, subject to Sections 2.02, 2.04, 2.05
and 2.06, in trust, all the right, title and interest of the Depositor in and to
the Mortgage Loans. Such conveyance includes, without limitation, the right to
all distributions of principal and interest received on or with respect to the
Mortgage Loans on and after the Cut-off Date (other than (i) any amounts
representing Retained Interest and (ii) payments of principal and interest due
on or before such date) and all such payments due after such date but received
prior to such date and intended by the related Mortgagors to be applied after
such date, together with all of the Depositor's right, title and interest in and
to the Collection Account and all amounts from time to time credited to and the
proceeds of the Collection Account, the Certificate Account and all amounts from
time to time credited to and the proceeds of the Certificate Account, any Escrow
Account established pursuant to Section 9.06 hereof and all amounts from time to
time credited to and the proceeds of any such Escrow Account, any REO Property
and the proceeds thereof, the Depositor's rights under any Insurance Policies
related to the Mortgage Loans, and the Depositor's security interest in any
collateral pledged to secure the Mortgage Loans, including the Mortgaged
Properties and any Additional Collateral, and any proceeds of the foregoing, to
have and to hold, in trust; and the Trustee declares that, subject to the review
provided for in Section 2.02, it has received and shall hold the Trust Fund, as
trustee, in trust, for the benefit and use of the Holders of the Certificates
and for the purposes and subject to the terms and conditions set forth in this
Agreement, and, concurrently with such receipt, has caused to be executed,
authenticated and delivered to or upon the order of the Depositor, in exchange
for the Trust Fund, Certificates in the authorized denominations evidencing the
entire ownership of the Trust Fund. In addition, the Depositor has caused the
Certificate Insurer to deliver the Class A4 Certificate Insurance Policy for the
benefit of the Class A4 Certificateholders and has made an initial deposit to
the Class A4 Reserve Fund of $5,000.

     Concurrently with the execution and delivery of this Agreement, the
Depositor does hereby assign to the Trustee all of its rights and interest under
each Mortgage Loan

                                       48
<PAGE>

Sale Agreement (other than any right to receive Retained Interest) including all
rights of the related Seller under the related Servicing Agreements to the
extent assigned under such Mortgage Loan Sale Agreement. The Trustee hereby
accepts such assignment, and shall be entitled to exercise all rights of the
Depositor under the related Mortgage Loan Sale Agreement as if, for such
purpose, it were the Depositor. The foregoing sale, transfer, assignment,
set-over, deposit and conveyance does not and is not intended to result in
creation or assumption by the Trustee of any obligation of the Depositor, any
Seller, or any other Person in connection with the Mortgage Loans or any other
agreement or instrument relating thereto except as specifically set forth
herein.

     In addition, with respect to any Additional Collateral Mortgage Loan, the
Depositor does hereby transfer, assign, set-over and otherwise convey to the
Trustee without recourse (except as provided herein) (i) its rights as assignee
under any security agreements, pledge agreements or guarantees relating to the
Additional Collateral supporting any Additional Collateral Mortgage Loan, (ii)
its security interest in and to any Additional Collateral, (iii) its right to
receive payments in respect of any Additional Collateral Mortgage Loan pursuant
to the Additional Collateral Servicing Agreement, and (iv) its rights as
beneficiary under the Surety Bond in respect of any Additional Collateral
Mortgage Loan.

     (b) In connection with such transfer and assignment, the Depositor does
hereby deliver to, and deposit with, or cause to be delivered to and deposited
with, the Trustee, and/or any custodian acting on the Trustee's behalf, if
applicable, the following documents or instruments with respect to each Mortgage
Loan (each a "Mortgage File") so transferred and assigned:

         (i) with respect to each Mortgage Loan, the original Mortgage Note
     endorsed without recourse in proper form to the order of the Trustee, as
     shown in Exhibit B-4, or in blank (in each case, with all necessary
     intervening endorsements as applicable);

         (ii) the original of any guarantee, security agreement or pledge
     agreement relating to any Additional Collateral executed in connection with
     the Mortgage Note, assigned to the Trustee;

         (iii) with respect to each Mortgage Loan other than a Cooperative Loan,
     the original recorded Mortgage with evidence of recording indicated
     thereon. If, in connection with any Mortgage Loan, the Depositor cannot
     deliver the Mortgage with evidence of recording thereon on or prior to the
     Closing Date because of a delay caused by the public recording office where
     such Mortgage has been delivered for recordation or because such Mortgage
     has been lost, the Depositor shall deliver or cause to be delivered to the
     Trustee (or its custodian), in the case of a delay due to recording, a true
     copy of such Mortgage, pending delivery of the original thereof, together
     with an Officer's Certificate of the Depositor certifying that the copy of
     such Mortgage delivered to the Trustee (or its custodian) is a true copy
     and that the original of such Mortgage has been forwarded to the public
     recording office, or, in the case of a Mortgage that has been lost, a copy
     thereof (certified as provided for under the laws of the appropriate
     jurisdiction) and a written Opinion of Counsel acceptable to the Trustee
     and the Depositor that an original recorded Mortgage is not required to
     enforce the Trustee's interest in the Mortgage Loan;

                                       49
<PAGE>

         (iv) the original of each assumption, modification or substitution
     agreement, if any, relating to the Mortgage Loans, or, as to any
     assumption, modification or substitution agreement which cannot be
     delivered on or prior to the Closing Date because of a delay caused by the
     public recording office where such assumption, modification or substitution
     agreement has been delivered for recordation, a photocopy of such
     assumption, modification or substitution agreement, pending delivery of the
     original thereof, together with an Officer's Certificate of the Depositor
     certifying that the copy of such assumption, modification or substitution
     agreement delivered to the Trustee (or its custodian) is a true copy and
     that the original of such agreement has been forwarded to the public
     recording office;

         (v) with respect to each Non-MERS Mortgage Loan other than a
     Cooperative Loan, the original Assignment of Mortgage for each Mortgage
     Loan;

         (vi) if applicable, such original intervening assignments of the
     Mortgage, notice of transfer or equivalent instrument (each, an
     "Intervening Assignment"), as may be necessary to show a complete chain of
     assignment from the originator, or, in the case of an Intervening
     Assignment that has been lost, a written Opinion of Counsel acceptable to
     the Trustee that such original Intervening Assignment is not required to
     enforce the Trustee's interest in the Mortgage Loans;

         (vii) the original Primary Mortgage Insurance Policy or certificate, if
     private mortgage guaranty insurance is required;

         (viii) with respect to each Mortgage Loan other than a Cooperative
     Loan, the original mortgagee title insurance policy or attorney's opinion
     of title and abstract of title;

         (ix) the original of any security agreement, chattel mortgage or
     equivalent executed in connection with the Mortgage or as to any security
     agreement, chattel mortgage or their equivalent that cannot be delivered on
     or prior to the Closing Date because of a delay caused by the public
     recording office where such document has been delivered for recordation, a
     photocopy of such document, pending delivery of the original thereof,
     together with an Officer's Certificate of the Depositor certifying that the
     copy of such security agreement, chattel mortgage or their equivalent
     delivered to the Trustee (or its custodian) is a true copy and that the
     original of such document has been forwarded to the public recording
     office;

         (x) with respect to any Cooperative Loan, the Cooperative Loan
     Documents;

         (xi) in connection with any pledge of Additional Collateral, the
     original additional collateral pledge and security agreement executed in
     connection therewith, assigned to the Trustee; and

         (xii) with respect to any manufactured housing contract, any related
     manufactured housing sales contract, installment loan agreement or
     participation interest.

                                       50
<PAGE>

     The parties hereto acknowledge and agree that the form of endorsement
attached hereto as Exhibit B-4 is intended to effect the transfer to the
Trustee, for the benefit of the Certificateholders, of the Mortgage Notes and
the Mortgages.

     (c) Assignments of Mortgage with respect to each Non-MERS Mortgage Loan
other than a Cooperative Loan shall be recorded; provided, however, that such
Assignments need not be recorded if, in the Opinion of Counsel (which must be
from Independent counsel) (which Opinion of Counsel may be in the form of a
memorandum of law) acceptable to the Trustee and the Rating Agencies, recording
in such states is not required to protect the Trustee's interest in the related
Non-MERS Mortgage Loans. Subject to the preceding sentence, as soon as
practicable after the Closing Date (but in no event more than 3 months
thereafter except to the extent delays are caused by the applicable recording
office), the Trustee, at the expense of the Depositor and with the cooperation
of the applicable Servicer, shall cause to be properly recorded by such Servicer
in each public recording office where the related Mortgages are recorded each
Assignment of Mortgage referred to in subsection (b)(v) above with respect to a
Non-MERS Mortgage Loan. With respect to each Cooperative Loan, the Trustee, at
the expense of the Depositor and with the cooperation of the applicable
Servicer, shall cause such Servicer to take such actions as are necessary under
applicable law in accordance with the advice of counsel (such advice not to be
obtained at the expense of the Trustee) in order to perfect the interest of the
Trustee in the related Mortgaged Property.

         (i) With respect to each MERS Mortgage Loan, the Trustee, at the
     expense of the Depositor and at the direction and with the cooperation of
     the applicable Servicer, shall cause to be taken such actions as are
     necessary to cause the Trustee to be clearly identified as the owner of
     each such Mortgage Loan on the records of MERS for purposes of the system
     of recording transfers of beneficial ownership of mortgages maintained by
     MERS.

     (d) In instances where a Title Insurance Policy is required to be delivered
to the Trustee, or to the applicable Custodian on behalf of the Trustee, under
clause (b)(viii) above and is not so delivered, the Depositor will provide a
copy of such Title Insurance Policy to the Trustee, or to the applicable
Custodian on behalf of the Trustee, as promptly as practicable after the
execution and delivery hereof, but in any case within 180 days of the Closing
Date.

     (e) For Mortgage Loans (if any) that have been prepaid in full after the
Cut-off Date and prior to the Closing Date, the Depositor, in lieu of delivering
the above documents, herewith delivers to the Trustee, or to the applicable
Custodian on behalf of the Trustee, an Officer's Certificate which shall include
a statement to the effect that all amounts received in connection with such
prepayment that are required to be deposited in the applicable Collection
Account pursuant to Section 4.01 have been so deposited. All original documents
that are not delivered to the Trustee or the applicable Custodian on behalf of
the Trustee shall be held by the Master Servicer or the applicable Servicer in
trust for the benefit of the Trustee and the Certificateholders.

                                       51
<PAGE>

     Section 2.02. Acceptance of Trust Fund by Trustee: Review of Documentation
for Trust Fund.

     (a) The Trustee, by execution and delivery hereof, acknowledges receipt by
the Trustee or by the applicable Custodian on behalf of the Trustee of the
Mortgage Files pertaining to the Mortgage Loans listed on the Mortgage Loan
Schedule, subject to review thereof by the Trustee, or by the applicable
Custodian on behalf of the Trustee, under this Section 2.02. The Trustee, or the
applicable Custodian on behalf of the Trustee, will execute and deliver to the
Trustee, the Depositor and the Master Servicer on the Closing Date an Initial
Certification in the form annexed hereto as Exhibit B-1 (or in the form annexed
to the applicable Custodial Agreement as Exhibit B-1, as applicable).

     (b) Within 45 days after the Closing Date, the applicable Custodian will,
on behalf of the Trustee and for the benefit of Holders of the Certificates,
review each Mortgage File to ascertain that all required documents set forth in
Section 2.01 have been received and appear on their face to contain the
requisite signatures by or on behalf of the respective parties thereto, and
shall deliver to the Trustee, the Depositor and the Master Servicer an Interim
Certification in the form annexed hereto as Exhibit B-2 (or in the form annexed
to the applicable Custodial Agreement as Exhibit B-2, as applicable) to the
effect that, as to each Mortgage Loan listed in the Mortgage Loan Schedule
(other than any Mortgage Loan prepaid in full or any Mortgage Loan specifically
identified in such certification as not covered by such certification), (i) all
of the applicable documents specified in Section 2.01(b) are in its possession
and (ii) such documents have been reviewed by it and appear to relate to such
Mortgage Loan. The Trustee, or the applicable Custodian on behalf of the
Trustee, shall make sure that the documents are executed and endorsed, but shall
be under no duty or obligation to inspect, review or examine any such documents,
instruments, certificates or other papers to determine that the same are valid,
binding, legally effective, properly endorsed, genuine, enforceable or
appropriate for the represented purpose or that they have actually been recorded
or are in recordable form or that they are other than what they purport to be on
their face. Neither the Trustee nor any Custodian shall have any responsibility
for verifying the genuineness or the legal effectiveness of or authority for any
signatures of or on behalf of any party or endorser.

     (c) If in the course of the review described in paragraph (b) above the
Trustee or the applicable Custodian discovers any document or documents
constituting a part of a Mortgage File that is missing, does not appear regular
on its face (i.e., is mutilated, damaged, defaced, torn or otherwise physically
altered) or appears to be unrelated to the Mortgage Loans identified in the
Mortgage Loan Schedule (each, a "Material Defect"), the Trustee, or the
applicable Custodian on behalf of the Trustee, shall promptly identify the
Mortgage Loan to which such Material Defect relates in the Interim Certificate
delivered to the Depositor or the Master Servicer (and to the Trustee). Within
90 days of its receipt of such notice, the Depositor shall be required to cure
such Material Defect (and, in such event, the Depositor shall provide the
Trustee with an Officer's Certificate confirming that such cure has been
effected). If the Depositor does not so cure such Material Defect, it shall, if
a loss has been incurred with respect to such Mortgage Loan that would, if such
Mortgage Loan were not purchased from the Trust Fund, constitute a Realized
Loss, and such loss is attributable to the failure of the Depositor to cure such
Material Defect, repurchase the related Mortgage Loan from the Trust Fund at the
Purchase Price. A loss shall be deemed to be attributable to the failure of the
Depositor to cure a Material

                                       52
<PAGE>

Defect if, as determined by the Depositor, upon mutual agreement with the
Trustee acting in good faith, absent such Material Defect, such loss would not
have been incurred. Within the two-year period following the Closing Date, the
Depositor may, in lieu of repurchasing a Mortgage Loan pursuant to this Section
2.02, substitute for such Mortgage Loan a Qualifying Substitute Mortgage Loan
subject to the provisions of Section 2.05. The failure of the Trustee or the
applicable Custodian to give the notice contemplated herein within 45 days after
the Closing Date shall not affect or relieve the Depositor of its obligation to
repurchase any Mortgage Loan pursuant to this Section 2.02 or any other Section
of this Agreement requiring the repurchase of Mortgage Loans from the Trust
Fund.

     (d) Within 180 days following the Closing Date, the Trustee, or the
applicable Custodian, shall deliver to the Trustee, the Depositor and the Master
Servicer a Final Certification substantially in the form annexed hereto as
Exhibit B-3 (or in the form annexed to the applicable Custodial Agreement as
Exhibit B-3, as applicable) evidencing the completeness of the Mortgage Files in
its possession or control, with any exceptions noted thereto.

     (e) Nothing in this Agreement shall be construed to constitute an
assumption by the Trust Fund, the Trustee, the Certificateholders or the
Certificate Insurer of any unsatisfied duty, claim or other liability on any
Mortgage Loan or to any Mortgagor.

     (f) Each of the parties hereto acknowledges that the Custodian shall
perform the applicable review of the Mortgage Loans and deliver the respective
certifications thereof as provided in this Section 2.02.

     Section 2.03. Representations and Warranties of the Depositor.

     (a) The Depositor hereby represents and warrants to the Trustee, for the
benefit of Certificateholders, to the Certificate Insurer and to the Master
Servicer, as of the Closing Date or such other date as is specified, that:

         (i) the Depositor is a corporation duly organized, validly existing and
     in good standing under the laws governing its creation and existence and
     has full corporate power and authority to own its property, to carry on its
     business as presently conducted, to enter into and perform its obligations
     under this Agreement, and to create the trust pursuant hereto;

         (ii) the execution and delivery by the Depositor of this Agreement have
     been duly authorized by all necessary corporate action on the part of the
     Depositor; neither the execution and delivery of this Agreement, nor the
     consummation of the transactions herein contemplated, nor compliance with
     the provisions hereof, will conflict with or result in a breach of, or
     constitute a default under, any of the provisions of any law, governmental
     rule, regulation, judgment, decree or order binding on the Depositor or its
     properties or the certificate of incorporation or bylaws of the Depositor;

         (iii) the execution, delivery and performance by the Depositor of this
     Agreement and the consummation of the transactions contemplated hereby do
     not require the consent or approval of, the giving of notice to, the
     registration with, or the taking of any other

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<PAGE>

     action in respect of, any state, federal or other governmental authority or
     agency, except such as has been obtained, given, effected or taken prior to
     the date hereof;

         (iv) this Agreement has been duly executed and delivered by the
     Depositor and, assuming due authorization, execution and delivery by the
     Trustee and the Master Servicer, constitutes a valid and binding obligation
     of the Depositor enforceable against it in accordance with its terms except
     as such enforceability may be subject to (A) applicable bankruptcy and
     insolvency laws and other similar laws affecting the enforcement of the
     rights of creditors generally and (B) general principles of equity
     regardless of whether such enforcement is considered in a proceeding in
     equity or at law;

         (v) there are no actions, suits or proceedings pending or, to the
     knowledge of the Depositor, threatened or likely to be asserted against or
     affecting the Depositor, before or by any court, administrative agency,
     arbitrator or governmental body (A) with respect to any of the transactions
     contemplated by this Agreement or (B) with respect to any other matter
     which in the judgment of the Depositor will be determined adversely to the
     Depositor and will if determined adversely to the Depositor materially and
     adversely affect it or its business, assets, operations or condition,
     financial or otherwise, or adversely affect its ability to perform its
     obligations under this Agreement; and

         (vi) immediately prior to the transfer and assignment of the Mortgage
     Loans to the Trustee, the Depositor was the sole owner of record and holder
     of each Mortgage Loan, and the Depositor had good and marketable title
     thereto, and had full right to transfer and sell each Mortgage Loan to the
     Trustee free and clear, subject only to (1) liens of current real property
     taxes and assessments not yet due and payable and, if the related Mortgaged
     Property is a condominium unit, any lien for common charges permitted by
     statute, (2) covenants, conditions and restrictions, rights of way,
     easements and other matters of public record as of the date of recording of
     such Mortgage acceptable to mortgage lending institutions in the area in
     which the related Mortgaged Property is located and specifically referred
     to in the lender's Title Insurance Policy or attorney's opinion of title
     and abstract of title delivered to the originator of such Mortgage Loan,
     and (3) such other matters to which like properties are commonly subject
     which do not, individually or in the aggregate, materially interfere with
     the benefits of the security intended to be provided by the Mortgage, of
     any encumbrance, equity, participation interest, lien, pledge, charge,
     claim 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 each Mortgage Loan pursuant to this Agreement.

     (b) The representations and warranties of each Transferor with respect to
the related Mortgage Loans in the applicable Transfer Agreement, which have been
assigned to the Trustee hereunder, were made as of the date specified in the
applicable Transfer Agreement (or underlying agreement, if such Transfer
Agreement is in the form of an assignment of a prior agreement). To the extent
that any fact, condition or event with respect to a Mortgage Loan constitutes a
breach of both (i) a representation or warranty of the applicable Transferor
under the applicable Transfer Agreement and (ii) a representation or warranty of
Lehman Capital or Lehman Bank under the related Mortgage Loan Sale Agreement,
the only right or remedy of the Trustee or of any Certificateholder shall be the
Trustee's right to enforce the obligations of the

                                       54
<PAGE>

applicable Transferor under any applicable representation or warranty made by
it. The Trustee acknowledges that Lehman Capital or Lehman Bank, as applicable,
shall have no obligation or liability with respect to any breach of a
representation or warranty made by it with respect to the Mortgage Loans if the
fact, condition or event constituting such breach also constitutes a breach of a
representation or warranty made by the applicable Transferor in the applicable
Transfer Agreement, without regard to whether such Transferor fulfills its
contractual obligations in respect of such representation or warranty. The
Trustee further acknowledges that the Depositor shall have no obligation or
liability with respect to any breach of any representation or warranty with
respect to the Mortgage Loans (except as set forth in Section 2.03(a)(vi)) under
any circumstances.

     Section 2.04. Discovery of Breach.

     It is understood and agreed that the representations and warranties (i) set
forth in Section 2.03, (ii) of Lehman Capital or of Lehman Bank set forth in the
related Mortgage Loan Sale Agreement and assigned to the Trustee by the
Depositor hereunder and (iii) of each Transferor, assigned by Lehman Capital or
by Lehman Bank, as applicable, to the Depositor pursuant to the related Mortgage
Loan Sale Agreement and assigned to the Trustee by the Depositor hereunder shall
each survive delivery of the Mortgage Files and the Assignment of Mortgage of
each Mortgage Loan to the Trustee and shall continue throughout the term of this
Agreement. Upon discovery by any of the Depositor, the Master Servicer, the
Trustee or the Certificate Insurer of a breach of any of such representations
and warranties that adversely and materially affects the value of the related
Mortgage Loan, the party discovering such breach shall give prompt written
notice to the other parties. Within 90 days of the discovery of a breach of any
representation or warranty given to the Trustee and the Certificate Insurer by
the Depositor, any Transferor, Lehman Bank or Lehman Capital and assigned to the
Trustee, the Depositor, such Transferor, Lehman Bank or Lehman Capital, as
applicable, shall either (a) cure such breach in all material respects, (b)
repurchase such Mortgage Loan or any property acquired in respect thereof from
the Trustee at the Purchase Price or (c) within the two year period following
the Closing Date, substitute a Qualifying Substitute Mortgage Loan for the
affected Mortgage Loan. In the event of discovery of a breach of any
representation and warranty of any Transferor assigned to the Trustee, the
Trustee shall enforce its rights under the applicable Transfer Agreement and the
related Mortgage Loan Sale Agreement for the benefit of Certificateholders. As
provided in each Mortgage Loan Sale Agreement, if any Transferor substitutes for
a Mortgage Loan for which there is a breach of any representations and
warranties in the related Transfer Agreement which adversely and materially
affects the value of such Mortgage Loan and such substitute mortgage loan is not
a Qualifying Substitute Mortgage Loan, under the terms of such Mortgage Loan
Sale Agreement, either Lehman Capital or Lehman Bank, as applicable, will, in
exchange for such Substitute Mortgage Loan, (i) provide the applicable Purchase
Price for the affected Mortgage Loan or (ii) within two years of the Closing
Date, substitute such affected Mortgage Loan with a Qualifying Substitute
Mortgage Loan.

     Section 2.05. Repurchase, Purchase or Substitution of Mortgage Loans.

     (a) With respect to any Mortgage Loan repurchased by the Depositor pursuant
to this Agreement, by Lehman Capital or Lehman Bank pursuant to the related
Mortgage Loan Sale Agreement or by any Transferor pursuant to the applicable
Transfer Agreement, the principal

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<PAGE>

portion of the funds received by the Trustee in respect of such repurchase of a
Mortgage Loan will be considered a Principal Prepayment and shall be deposited
in the Collection Account. The Trustee, upon receipt of the full amount of the
Purchase Price for a Deleted Mortgage Loan, or upon receipt of the Mortgage File
for a Qualifying Substitute Mortgage Loan substituted for a Deleted Mortgage
Loan (and any applicable Substitution Amount), shall release or cause to be
released and reassigned to the Depositor, Lehman Capital, Lehman Bank or the
applicable Transferor, as applicable, the related Mortgage File for the Deleted
Mortgage Loan and shall execute and deliver such instruments of transfer or
assignment, in each case without recourse, representation or warranty, as shall
be necessary to vest in such party or its designee or assignee title to any
Deleted Mortgage Loan released pursuant hereto, free and clear of all security
interests, liens and other encumbrances created by this Agreement, which
instruments shall be prepared by the Trustee (or its custodian), and the Trustee
shall have no further responsibility with respect to the Mortgage File relating
to such Deleted Mortgage Loan. Each Seller indemnifies and holds the Trust Fund,
the Trustee, the Depositor and each Certificateholder harmless against any and
all taxes, claims, losses, penalties, fines, forfeitures, reasonable legal fees
and related costs, judgements, and any other costs, fees and expenses that the
Trust Fund, the Trustee, the Depositor and any Certificateholder may sustain in
connection with any actions of the related Seller relating to a repurchase of a
Mortgage Loan other than in compliance with the terms of this Section 2.05 and
the related Mortgage Loan Sale Agreement, to the extent that any such action
causes (i) any federal or state tax to be imposed on the Trust Fund, including
without limitation, any federal tax imposed on "prohibited transactions" under
Section 860F(a)(l) of the Code or on "contributions after the startup date"
under Section 860G(d)(l) of the Code, or (ii) the REMIC to fail to qualify as a
REMIC at any time that any Certificate is outstanding.

     (b) With respect to each Qualifying Substitute Mortgage Loan to be
delivered to the Trustee (or its custodian) pursuant to the terms of this
Article II in exchange for a Deleted Mortgage Loan: (i) the Depositor, the
applicable Transferor, Lehman Bank or Lehman Capital, as applicable, must
deliver to the Trustee (or its custodian) the Mortgage File for the Qualifying
Substitute Mortgage Loan containing the documents set forth in Section 2.01(b)
along with a written certification certifying as to the delivery of such
Mortgage File and containing the granting language set forth in Section 2.01(a);
and (ii) the Depositor will be deemed to have made, with respect to such
Qualified Substitute Mortgage Loan, each of the representations and warranties
made by it with respect to the related Deleted Mortgage Loan. As soon as
practicable after the delivery of any Qualifying Substitute Mortgage Loan
hereunder, the Trustee, at the expense of the Depositor and at the direction and
with the cooperation of the applicable Servicer, shall (i) with respect to a
Qualifying Substitute Mortgage Loan that is a Non-MERS Mortgage Loan, cause the
Assignment of Mortgage to be recorded by such Servicer if required pursuant to
Section 2.01(c)(i), or (ii) with respect to a Qualifying Substitute Mortgage
Loan that is a MERS Mortgage Loan, cause to be taken such actions as are
necessary to cause the Trustee to be clearly identified as the owner of each
such Mortgage Loan on the records of MERS if required pursuant to Section
2.01(c)(ii).

     (c) Notwithstanding any other provision of this Agreement, the right to
substitute Mortgage Loans pursuant to this Article II shall be subject to the
additional limitations that no substitution of a Qualifying Substitute Mortgage
Loan for a Deleted Mortgage Loan shall be made unless the Trustee has received
an Opinion of Counsel (at the expense of the party seeking to make the
substitution) that, under current law, such substitution will not (A) affect
adversely

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<PAGE>

the status of any REMIC established hereunder as a REMIC, or of the related
"regular interests" as "regular interests" in any such REMIC, or (B) cause any
such REMIC to engage in a "prohibited transaction" or prohibited contribution
pursuant to the REMIC Provisions.

     Section 2.06. Grant Clause.

     (a) It is intended that the conveyance of the Depositor's right, title and
interest in and to property constituting the Trust Fund pursuant to this
Agreement shall constitute, and shall be construed as, a sale of such property
and not a grant of a security interest to secure a loan. However, if such
conveyance is deemed to be in respect of a loan, it is intended that: (1) the
rights and obligations of the parties shall be established pursuant to the terms
of this Agreement; (2) the Depositor hereby grants to the Trustee for the
benefit of the Holders of the Certificates and the Certificate Insurer a first
priority security interest in all of the Depositor's right, title and interest
in, to and under, whether now owned or hereafter acquired, the Trust Fund and
all proceeds of any and all property constituting the Trust Fund to secure
payment of the Certificates; and (3) this Agreement shall constitute a security
agreement under applicable law. If such conveyance is deemed to be in respect of
a loan and the Trust created by this Agreement terminates prior to the
satisfaction of the claims of any Person holding any Certificate, the security
interest created hereby shall continue in full force and effect and the Trustee
shall be deemed to be the collateral agent for the benefit of such Person, and
all proceeds shall be distributed as herein provided.

     (b) The Trustee shall, to the extent consistent with this Agreement, take
such reasonable actions (except for actions to be taken by other parties as set
forth herein), as set forth in an Opinion of Counsel (such opinion to be
provided at the expense of the Depositor) delivered to the Trustee, as may be
necessary to ensure that, if this Agreement were deemed to create a security
interest in the Mortgage Loans and the other property described above, 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 this Agreement. The Depositor will, at its own expense, make all initial
filings (if applicable) on or about the Closing Date and shall forward a copy of
such filing or filings to the Trustee. Without limiting the generality of the
foregoing, the Depositor shall prepare or cause the Master Servicer to prepare
and forward for filing, or shall cause to be forwarded for filing, at the
expense of the Depositor, all filings necessary to maintain the effectiveness of
any original filings necessary under the relevant UCC to perfect the Trustee's
security interest in or lien on the Mortgage Loans, including without limitation
(x) continuation statements, and (y) such other statements as may be occasioned
by (i) any change of name of the Seller, the Depositor or the Trustee, (ii) any
change of location of the jurisdiction of the Seller or the Depositor, (iii) any
transfer of any interest of the Seller or the Depositor in any Mortgage Loan or
(iv) any change under the relevant UCC or other applicable laws. Neither the
Seller nor the Depositor shall organize under the law of any jurisdiction other
than the State under which each is organized as of the Closing Date (whether
changing its jurisdiction of organization or organizing under an additional
jurisdiction) without giving 30 days prior written notice of such action to its
immediate and mediate transferee, including the Trustee. Before effecting such
change, the Seller or the Depositor proposing to change its jurisdiction of
organization shall prepare and file in the appropriate filing office any
financing statements or other statements necessary to continue the perfection of
the interests of its immediate and mediate transferees, including the Trustee,
in the Mortgage Loans. In connection

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<PAGE>

with the transactions contemplated by this Agreement, each of the Seller and the
Depositor authorizes its immediate or mediate transferee to file in any filing
office any initial financing statements, any amendments to financing statements,
any continuation statements, or any other statements or filings described in
this paragraph (b).

                                  ARTICLE III

                                THE CERTIFICATES

     Section 3.01. The Certificates.

     (a) The Certificates shall be issuable in registered form only and shall be
securities governed by Article 8 of the New York Uniform Commercial Code. The
Book-Entry Certificates will be evidenced by one or more certificates,
beneficial ownership of which will be held in the dollar denominations in
Certificate Principal Amount or Notional Principal Amount, as applicable, or in
the Percentage Interests, specified herein. Each Class of Book-Entry
Certificates shall be issued in the minimum denominations in Certificate
Principal Amount (or Notional Amount) or Percentage Interest specified in the
Preliminary Statement hereto and in integral multiples of $1 or 5% (in the case
of Certificates issued in Percentage Interests) in excess thereof. Each Class of
Non-Book Entry Certificates other than the Residual Certificate shall be issued
in definitive, fully registered form in the minimum denominations in Certificate
Principal Amount (or Notional Amount) specified in the Preliminary Statement
hereto and in integral multiples of $1 in excess thereof. The Residual
Certificate shall be issued as a single Certificate and maintained in
definitive, fully registered form in a minimum denomination equal to 100% of the
Percentage Interest of such Class. The Certificates may be issued in the form of
typewritten certificates. One Certificate of each Class of Certificates other
than any Class of Residual Certificates may be issued in any denomination in
excess of the minimum denomination.

     (b) The Certificates shall be executed by manual or facsimile signature on
behalf of the Trustee by an authorized officer. Each Certificate shall, on
original issue, be authenticated by the Trustee upon the order of the Depositor
upon receipt by the Trustee of the Mortgage Files described in Section 2.01. No
Certificate shall be entitled to any benefit under this Agreement, or be valid
for any purpose, unless there appears on such Certificate a certificate of
authentication substantially in the form provided for herein, executed by an
authorized officer of the Trustee or the Authenticating Agent, if any, by manual
signature, and such certification upon any Certificate shall be conclusive
evidence, and the only evidence, that such Certificate has been duly
authenticated and delivered hereunder. All Certificates shall be dated the date
of their authentication. At any time and from time to time after the execution
and delivery of this Agreement, the Depositor may deliver Certificates executed
by the Depositor to the Trustee or the Authenticating Agent for authentication
and the Trustee or the Authenticating Agent shall authenticate and deliver such
Certificates as in this Agreement provided and not otherwise.

     (c) The Class B4, Class B5 or Class B6 Certificates offered and sold in
reliance on the exemption from registration under Rule 144A shall be issued
initially in the form of one or more permanent global Certificates in
definitive, fully registered form without interest coupons with the applicable
legends set forth in Exhibit A added to the forms of such Certificates (each, a

                                       58
<PAGE>

"Restricted Global Security"), which shall be deposited on behalf of the
subscribers for such Certificates represented thereby with the Trustee, as
custodian for DTC and registered in the name of a nominee of DTC, duly executed
and authenticated by the Trustee as hereinafter provided. The aggregate
principal amounts of the Restricted Global Securities may from time to time be
increased or decreased by adjustments made on the records of the Trustee or DTC
or its nominee, as the case may be, as hereinafter provided.

     The Class B4, Class B5 or Class B6 Certificates sold in offshore
transactions in reliance on Regulation S shall be issued initially in the form
of one or more permanent global Certificates in definitive, fully registered
form without interest coupons with the applicable legends set forth in Exhibit A
hereto added to the forms of such Certificates (each, a "Regulation S Global
Security"), which shall be deposited on behalf of the subscribers for such
Certificates represented thereby with the Trustee, as custodian for DTC and
registered in the name of a nominee of DTC, duly executed and authenticated by
the Trustee as hereinafter provided. The aggregate principal amounts of the
Regulation S Global Securities may from time to time be increased or decreased
by adjustments made on the records of the Trustee or DTC or its nominee, as the
case may be, as hereinafter provided.

     The Class B4, Class B5 or Class B6 Certificates sold to an "accredited
investor" under Rule 501(a)(1), (2), (3) or (7) under the Act shall be issued
initially in the form of one or more Definitive Certificates.

     Section 3.02. Registration.

     The Trustee is hereby appointed, and hereby accepts its appointment as,
Certificate Registrar in respect of the Certificates and shall maintain books
for the registration and for the transfer of Certificates (the "Certificate
Register"). The Trustee may appoint a bank or trust company to act as
Certificate Registrar. A registration book shall be maintained for the
Certificates collectively. The Certificate Registrar may resign or be discharged
or removed and a new successor may be appointed in accordance with the
procedures and requirements set forth in Sections 6.06 and 6.07 hereof with
respect to the resignation, discharge or removal of the Trustee and the
appointment of a successor Trustee. The Certificate Registrar may appoint, by a
written instrument delivered to the Holders and the Master Servicer, any bank or
trust company to act as co-registrar under such conditions as the Certificate
Registrar may prescribe; provided, however, that the Certificate Registrar shall
not be relieved of any of its duties or responsibilities hereunder by reason of
such appointment.

     Section 3.03. Transfer and Exchange of Certificates.

     (a) A Certificate (other than Book-Entry Certificates which shall be
subject to Section 3.09 hereof) may be transferred by the Holder thereof only
upon presentation and surrender of such Certificate at the office of the
Certificate Registrar duly endorsed or accompanied by an assignment duly
executed by such Holder or his duly authorized attorney in such form as shall be
satisfactory to the Certificate Registrar. Upon the transfer of any Certificate
in accordance with the preceding sentence, the Trustee shall execute, and the
Trustee or any Authenticating Agent shall authenticate and deliver to the
transferee, one or more new Certificates of the same Class and evidencing, in
the aggregate, the same aggregate Certificate Principal Amount as the

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<PAGE>

Certificate being transferred. No service charge shall be made to a
Certificateholder for any registration of transfer of Certificates, but the
Certificate Registrar may require payment of a sum sufficient to cover any tax
or governmental charge that may be imposed in connection with any registration
of transfer of Certificates.

     (b) A Certificate may be exchanged by the Holder thereof for any number of
new Certificates of the same Class, in authorized denominations, representing in
the aggregate the same Certificate Principal Amount as the Certificate
surrendered, upon surrender of the Certificate to be exchanged at the office of
the Certificate Registrar duly endorsed or accompanied by a written instrument
of transfer duly executed by such Holder or his duly authorized attorney in such
form as is satisfactory to the Certificate Registrar. Certificates delivered
upon any such exchange will evidence the same obligations, and will be entitled
to the same rights and privileges, as the Certificates surrendered. No service
charge shall be made to a Certificateholder for any exchange of Certificates,
but the Certificate Registrar may require payment of a sum sufficient to cover
any tax or governmental charge that may be imposed in connection with any
exchange of Certificates. Whenever any Certificates are so surrendered for
exchange, the Trustee shall execute, and the Trustee or the Authenticating Agent
shall authenticate, date and deliver the Certificates which the
Certificateholder making the exchange is entitled to receive.

     (c) By acceptance of a Restricted Certificate or a Regulation S Global
Security, whether upon original issuance or subsequent transfer, each Holder of
such a Certificate acknowledges the restrictions on the transfer of such
Certificate set forth thereon and agrees that it will transfer such a
Certificate only as provided herein. In addition, each Holder of a Regulation S
Global Security shall be deemed to have represented and warranted to the
Trustee, the Certificate Registrar and any of their respective successors that:
(i) such Person is not a U.S. person within the meaning of Regulation S and was,
at the time the buy order was originated, outside the United States and (ii)
such Person understands that such Certificates have not been registered under
the Securities Act of 1933, as amended (the "Act"), and that (x) until the
expiration of the 40-day distribution compliance period (within the meaning of
Regulation S), no offer, sale, pledge or other transfer of such Certificates or
any interest therein shall be made in the United States or to or for the account
or benefit of a U.S. person (each as defined in Regulation S), (y) if in the
future it decides to offer, resell, pledge or otherwise transfer such
Certificates, such Certificates may be offered, resold, pledged or otherwise
transferred only (A) to a person which the seller reasonably believes is a
"qualified institutional buyer" (a "QIB") as defined in Rule 144A under the Act,
that is purchasing such Certificates for its own account or for the account of a
qualified institutional buyer to which notice is given that the transfer is
being made in reliance on Rule 144A or (B) in an offshore transaction (as
defined in Regulation S) in compliance with the provisions of Regulation S, in
each case in compliance with the requirements of this Agreement; and it will
notify such transferee of the transfer restrictions specified in this Section.

     The following restrictions shall apply with respect to the transfer and
registration of transfer of a Restricted Certificate to a transferee that takes
delivery in the form of a Definitive Certificate:

         (i) The Certificate Registrar shall register the transfer of a
     Restricted Certificate if the requested transfer is (x) to the Depositor or
     the Placement Agent, an

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<PAGE>

     affiliate (as defined in Rule 405 under the Act) of the Depositor or the
     Placement Agent or (y) being made to a QIB by a transferor that has
     provided the Trustee with a certificate in the form of Exhibit F hereto;
     and

         (ii) The Certificate Registrar shall register the transfer of a
     Restricted Certificate if the requested transfer is being made to an
     "accredited investor" under Rule 501(a)(1), (2), (3) or (7) under the Act
     by a transferor who furnishes to the Trustee a letter of the transferee
     substantially in the form of Exhibit G hereto.

     (d) No transfer of an ERISA-Restricted Certificate in the form of a
Definitive Certificate shall be made to any Person unless the Trustee has
received (A) a certificate substantially in the form of Exhibit H (or Exhibit
D-1 in the case of the Class R Certificate) hereto from such transferee or (B)
an Opinion of Counsel satisfactory to the Trustee and the Depositor to the
effect that the purchase and holding of such a Certificate will not constitute
or result in the assets of the Trust Fund being deemed to be "plan assets"
subject to the prohibited transactions provisions of ERISA or Section 4975 of
the Code and will not subject the Trustee or the Depositor to any obligation in
addition to those undertaken in the Agreement; provided, however, that the
Trustee will not require such certificate or opinion in the event that, as a
result of a change of law or otherwise, counsel satisfactory to the Trustee has
rendered an opinion to the effect that the purchase and holding of an
ERISA-Restricted Certificate by a Plan or a Person that is purchasing or holding
such a Certificate with the assets of a Plan will not constitute or result in a
prohibited transaction under ERISA or Section 4975 of the Code. Each Transferee
of an ERISA-Restricted Certificate that is a Book-Entry Certificate shall be
deemed to have made the representations set forth in Exhibit H. The preparation
and delivery of the certificate and opinions referred to above shall not be an
expense of the Trust Fund, the Trustee or the Depositor. Notwithstanding the
foregoing, no opinion or certificate shall be required for the initial issuance
of the ERISA-Restricted Certificates. The Trustee shall have no obligation to
monitor transfers of Book-Entry Certificates that are ERISA-Restricted
Certificates and shall have no liability for transfers of such Certificates in
violation of the transfer restrictions.

     Notwithstanding anything to the contrary herein, any purported transfer of
an ERISA-Restricted Certificate in the form of a Definitive Certificate to or on
behalf of an employee benefit plan subject to Section 406 ERISA or a plan
subject to Section 4975 of the Code without the delivery to the Trustee and the
Master Servicer of an Opinion of Counsel satisfactory to the Trustee and the
Master Servicer as described above shall be void and of no effect; provided that
the restriction set forth in this sentence shall not be applicable if there has
been delivered to the Trustee and the Master Servicer an Opinion of Counsel
meeting the requirements of clause (B) of the first sentence of the first
paragraph of this Section 3.03(d). 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 3.03(d) 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 by the Trustee in accordance with the foregoing
requirements. The Trustee shall be entitled, but not obligated, to recover from
any Holder of any ERISA-Restricted Certificate that was in fact an employee
benefit plan 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 at the time it became
a Holder or, at such subsequent time as it became such a plan or Person acting
on behalf of such a plan, all payments made on such ERISA-Restricted

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<PAGE>

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 Holder
of such Certificate that is not such a plan or Person acting on behalf of a
plan.

     (e) As a condition of the registration of transfer or exchange of any
Certificate, the Certificate Registrar may require the certified taxpayer
identification number of the owner of the Certificate and the payment of a sum
sufficient to cover any tax or other governmental charge imposed in connection
therewith; provided, however, that the Certificate Registrar shall have no
obligation to require such payment or to determine whether or not any such tax
or charge may be applicable. No service charge shall be made to the
Certificateholder for any registration, transfer or exchange of Certificate.

     (f) Notwithstanding anything to the contrary contained herein, no Residual
Certificate may be owned, pledged or transferred, directly or indirectly, by or
to (i) a Disqualified Organization or (ii) an individual, corporation or
partnership or other person unless such person is (A) not a Non-U.S. Person or
(B) is a Non-U.S. Person that holds a Residual Certificate in connection with
the conduct of a trade or business within the United States and has furnished
the transferor and the Trustee with an effective Internal Revenue Service Form
4224 or successor form at the time and in the manner required by the Code (any
such person who is not covered by clause (A) or (B) above is referred to herein
as a "Non-permitted Foreign Holder").

     Prior to and as a condition of the registration of any transfer, sale or
other disposition of a Residual Certificate, the proposed transferee shall
deliver to the Trustee an affidavit in substantially the form attached hereto as
Exhibit D-1 representing and warranting, among other things, that such
transferee is neither a Disqualified Organization, an agent or nominee acting on
behalf of a Disqualified Organization, nor a Non-permitted Foreign Holder (any
such transferee, a "Permitted Transferee") and the proposed transferor shall
deliver to the Trustee an affidavit in substantially the form attached hereto as
Exhibit D-2. In addition, the Trustee may (but shall have no obligation to)
require, prior to and as a condition of any such transfer, the delivery by the
proposed transferee of an Opinion of Counsel, addressed to the Depositor and the
Trustee satisfactory in form and substance to the Depositor, that such proposed
transferee or, if the proposed transferee is an agent or nominee, the proposed
beneficial owner, is not a Disqualified Organization, agent or nominee thereof,
or Non-permitted Foreign Holder. Notwithstanding the registration in the
Certificate Register of any transfer, sale, or other disposition of a Residual
Certificate to a Disqualified Organization, an agent or nominee thereof, or
Non-permitted Foreign Holder, such registration shall be deemed to be of no
legal force or effect whatsoever and such Disqualified Organization, agent or
nominee thereof, or Non-permitted Foreign Holder shall not be deemed to be a
Certificateholder for any purpose hereunder, including, but not limited to, the
receipt of distributions on such Residual Certificate. The Trustee shall not be
under any liability to any person for any registration or transfer of a Residual
Certificate to a Disqualified Organization, agent or nominee thereof, or
Non-permitted Foreign Holder or for the maturity of any payments due on such
Residual Certificate to the Holder thereof or for taking any other action with
respect to such Holder under the provisions of the Agreement, so long as the
transfer was effected in accordance with this Section 3.03(f), unless the
Trustee shall have actual knowledge at the time of such transfer or the time of
such payment or other action that the transferee is a Disqualified Organization,
agent or nominee thereof, or Non-permitted Foreign Holder. The Trustee shall be
entitled to recover from any Holder of a Residual Certificate that

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was a Disqualified Organization, agent or nominee thereof, or Non-permitted
Foreign Holder at the time it became a Holder or any subsequent time it became a
Disqualified Organization, agent or nominee thereof, or Non-permitted Foreign
Holder, all payments made on such Residual Certificate at and after either such
times (and all costs and expenses, including but not limited to attorneys' fees,
incurred in connection therewith). Any payment (not including any such costs and
expenses) so recovered by the Trustee shall be paid and delivered to the last
preceding Holder of such Residual Certificate.

     If any purported transferee shall become a registered Holder of a Residual
Certificate in violation of the provisions of this Section 3.03(f), then upon
receipt of written notice to the Trustee that the registration of transfer of
such Residual Certificate was not in fact permitted by this Section 3.03(f), the
last preceding Permitted Transferee shall be restored to all rights as Holder
thereof retroactive to the date of such 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 this Section 3.03(f), for making any payment due on such
Certificate to the registered Holder thereof or for taking any other action with
respect to such Holder under the provisions of this Agreement so long as the
transfer was registered upon receipt of the affidavit described in the preceding
paragraph of this Section 3.03(f).

     (g) Each Holder of a Residual Certificate, by such Holder's acceptance
thereof, shall be deemed for all purposes to have consented to the provisions of
this section.

     (h) Notwithstanding any provision to the contrary herein, so long as a
Global Security representing either of the Class B4, Class B5 or Class B6
Certificates remains outstanding and is held by or on behalf of DTC, transfers
of a Global Security representing any such Certificates, in whole or in part,
shall only be made in accordance with Section 3.01 and this Section 3.03(h).

            (A) Subject to clauses (B) and (C) of this Section 3.03(h),
         transfers of a Global Security representing either of the Class B4,
         Class B5 or Class B6 Certificates shall be limited to transfers of such
         Global Security, in whole or in part, to nominees of DTC or to a
         successor of DTC or such successor's nominee.

            (B) Restricted Global Security to Regulation S Global Security. If a
         holder of a beneficial interest in a Restricted Global Security
         deposited with or on behalf of DTC wishes at any time to exchange its
         interest in such Restricted Global Security for an interest in a
         Regulation S Global Security, or to transfer its interest in such
         Restricted Global Security to a Person who wishes to take delivery
         thereof in the form of an interest in a Regulation S Global Security,
         such holder, provided such holder is not a U.S. person, may, subject to
         the rules and procedures of DTC, exchange or cause the exchange of such
         interest for an equivalent beneficial interest in the Regulation S
         Global Security. Upon receipt by the Trustee, as Certificate Registrar,
         of (I) instructions from DTC directing the Trustee, as Certificate
         Registrar, to be credited a beneficial interest in a Regulation S
         Global Security in an amount equal to the beneficial interest in such
         Restricted Global Security to be exchanged but not less than the
         minimum denomination applicable to such holder's Certificates held
         through a Regulation S Global Security, (II) a written order given in
         accordance with DTC's procedures

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         containing information regarding the participant account of DTC and, in
         the case of a transfer pursuant to and in accordance with Regulation S,
         the Euroclear or Clearstream account to be credited with such increase
         and (III) a certificate in the form of Exhibit N-1 hereto given by the
         holder of such beneficial interest stating that the exchange or
         transfer of such interest has been made in compliance with the transfer
         restrictions applicable to the Global Securities, including that the
         holder is not a U.S. person, and pursuant to and in accordance with
         Regulation S, the Trustee, as Certificate Registrar, shall reduce the
         principal amount of the Restricted Global Security and increase the
         principal amount of the Regulation S Global Security by the aggregate
         principal amount of the beneficial interest in the Restricted Global
         Security to be exchanged, and shall instruct Euroclear or Clearstream,
         as applicable, concurrently with such reduction, to credit or cause to
         be credited to the account of the Person specified in such instructions
         a beneficial interest in the Regulation S Global Security equal to the
         reduction in the principal amount of the Restricted Global Security.

            (C) Regulation S Global Security to Restricted Global Security. If a
         holder of a beneficial interest in a Regulation S Global Security
         deposited with or on behalf of DTC wishes at any time to transfer its
         interest in such Regulation S Global Security to a Person who wishes to
         take delivery thereof in the form of an interest in a Restricted Global
         Security, such holder may, subject to the rules and procedures DTC,
         exchange or cause the exchange of such interest for an equivalent
         beneficial interest in a Restricted Global Security. Upon receipt by
         the Trustee, as Certificate Registrar, of (I) instructions from DTC
         directing the Trustee, as Certificate Registrar, to cause to be
         credited a beneficial interest in a Restricted Global Security in an
         amount equal to the beneficial interest in such Regulation S Global
         Security to be exchanged but not less than the minimum denomination
         applicable to such holder's Certificates held through a Restricted
         Global Security, to be exchanged, such instructions to contain
         information regarding the participant account with DTC to be credited
         with such increase, and (II) a certificate in the form of Exhibit N-2
         hereto given by the holder of such beneficial interest and stating,
         among other things, that the Person transferring such interest in such
         Regulation S Global Security reasonably believes that the Person
         acquiring such interest in a Restricted Global Security is a QIB, is
         obtaining such beneficial interest in a transaction meeting the
         requirements of Rule 144A and in accordance with any applicable
         securities laws of any State of the United States or any other
         jurisdiction, then the Trustee, as Certificate Registrar, will reduce
         the principal amount of the Regulation S Global Security and increase
         the principal amount of the Restricted Global Security by the aggregate
         principal amount of the beneficial interest in the Regulation S Global
         Security to be transferred and the Trustee, as Certificate Registrar,
         shall instruct DTC, concurrently with such reduction, to credit or
         cause to be credited to the account of the Person specified in such
         instructions a beneficial interest in the Restricted Global Security
         equal to the reduction in the principal amount of the Regulation S
         Global Security.

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            (D) Other Exchanges. In the event that a Global Security is
         exchanged for Certificates in definitive registered form without
         interest coupons, pursuant to Section 3.09(c) hereof, such Certificates
         may be exchanged for one another only in accordance with such
         procedures as are substantially consistent with the provisions above
         (including certification requirements intended to insure that such
         transfers comply with Rule 144A, comply with Rule 501(a)(1), (2), (3)
         or (7) or are to non-U.S. persons in compliance with Regulation S under
         the Act, as the case may be), and as may be from time to time adopted
         by the Trustee.

            (E) Restrictions on U.S. Transfers. Transfers of interests in the
         Regulation S Global Security to U.S. persons (as defined in Regulation
         S) shall be limited to transfers made pursuant to the provisions of
         Section 3.03(h)(C).

     Section 3.04. Cancellation of Certificates.

     Any Certificate surrendered for registration of transfer or exchange shall
be cancelled and retained in accordance with normal retention policies with
respect to cancelled certificates maintained by the Trustee or the Certificate
Registrar.

     Section 3.05. Replacement of Certificates.

     If (i) any Certificate is mutilated and is surrendered to the Trustee or
any Authenticating Agent or (ii) the Trustee or any Authenticating Agent
receives evidence to its satisfaction of the destruction, loss or theft of any
Certificate, and there is delivered to the Trustee or the Authenticating Agent
such security or indemnity as may be required by them to save each of them
harmless, then, in the absence of notice to the Depositor and any Authenticating
Agent that such destroyed, lost or stolen Certificate has been acquired by a
bona fide purchaser, the Trustee shall execute and the Trustee or any
Authenticating Agent shall authenticate and deliver, in exchange for or in lieu
of any such mutilated, destroyed, lost or stolen Certificate, a new Certificate
of like tenor and Certificate Principal Amount. Upon the issuance of any new
Certificate under this Section 3.05, the Trustee and Authenticating Agent 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 or the Authenticating Agent) connected
therewith. Any replacement Certificate issued pursuant to this Section 3.05
shall constitute complete and indefeasible evidence of ownership in the
applicable Trust Fund, as if originally issued, whether or not the lost, stolen
or destroyed Certificate shall be found at any time.

     Section 3.06. Persons Deemed Owners.

     Subject to the provisions of Section 3.09 with respect to Book-Entry
Certificates, the Depositor, the Master Servicer, the Trustee, the Certificate
Registrar and any agent of any of them may treat the Person in whose name any
Certificate is registered upon the books of the Certificate Registrar as the
owner of such Certificate for the purpose of receiving distributions pursuant to
Sections 5.01 and 5.02 and for all other purposes whatsoever, and neither the
Depositor, the Master Servicer, the Trustee, the Certificate Registrar nor any
agent of any of them shall be affected by notice to the contrary.

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     Section 3.07. Temporary Certificates.

     (a) Pending the preparation of definitive Certificates, upon the order of
the Depositor, the Trustee shall execute and shall authenticate and deliver
temporary Certificates that are printed, lithographed, typewritten, mimeographed
or otherwise produced, in any authorized denomination, substantially of the
tenor of the definitive Certificates in lieu of which they are issued and with
such variations as the authorized officers executing such Certificates may
determine, as evidenced by their execution of such Certificates.

     (b) If temporary Certificates are issued, the Depositor will cause
definitive Certificates to be prepared without unreasonable delay. After the
preparation of definitive Certificates, the temporary Certificates shall be
exchangeable for definitive Certificates upon surrender of the temporary
Certificates at the office or agency of the Trustee without charge to the
Holder. Upon surrender for cancellation of any one or more temporary
Certificates, the Trustee shall execute and authenticate and deliver in exchange
therefor a like aggregate Certificate Principal Amount of definitive
Certificates of the same Class in the authorized denominations. Until so
exchanged, the temporary Certificates shall in all respects be entitled to the
same benefits under this Agreement as definitive Certificates of the same Class.

     Section 3.08. Appointment of Paying Agent.

     The Trustee may appoint a Paying Agent (which may be the Trustee) for the
purpose of making distributions to Certificateholders hereunder. The Trustee
shall cause such Paying Agent to execute and deliver to the Trustee an
instrument in which such Paying Agent shall agree with the Trustee that such
Paying Agent will hold all sums held by it for the payment to Certificateholders
in an Eligible Account in trust for the benefit of the Certificateholders
entitled thereto until such sums shall be paid to the Certificateholders. All
funds remitted by the Trustee to any such Paying Agent for the purpose of making
distributions shall be paid to Certificateholders on each Distribution Date and
any amounts not so paid shall be returned on such Distribution Date to the
Trustee. If the Paying Agent is not the Trustee, the Trustee shall cause to be
remitted to the Paying Agent on or before the Business Day prior to each
Distribution Date, by wire transfer in immediately available funds, the funds to
be distributed on such Distribution Date. Any Paying Agent shall be either a
bank or trust company or otherwise authorized under law to exercise corporate
trust powers.

     Section 3.09. Book-Entry Certificates.

     (a) Each Class of Book-Entry Certificates, upon original issuance, shall be
issued in the form of one or more typewritten Certificates representing the
Book-Entry Certificates, to be delivered to The Depository Trust Company, or its
custodian, the initial Clearing Agency, by, or on behalf of, the Depositor. The
Book-Entry Certificates shall initially be registered on the Certificate
Register in the name of the nominee of the Clearing Agency, and no Certificate
Owner will receive a definitive certificate representing such Certificate
Owner's interest in the Book-Entry Certificates, except as provided in Section
3.09(c). Unless Definitive Certificates have been issued to Certificate Owners
of Book-Entry Certificates pursuant to Section 3.09(c):

         (i) the provisions of this Section 3.09 shall be in full force and
     effect;

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         (ii) the Depositor, the Master Servicer, the Paying Agent, the
     Registrar and the Trustee may deal with the Clearing Agency for all
     purposes (including the making of distributions on the Book-Entry
     Certificates) as the authorized representatives of the Certificate Owners
     and the Clearing Agency shall be responsible for crediting the amount of
     such distributions to the accounts of such Persons entitled thereto, in
     accordance with the Clearing Agency's normal procedures;

         (iii) to the extent that the provisions of this Section 3.09 conflict
     with any other provisions of this Agreement, the provisions of this Section
     3.09 shall control; and

         (iv) the rights of Certificate Owners shall be exercised only through
     the Clearing Agency and the Clearing Agency Participants and shall be
     limited to those established by law and agreements between such Certificate
     Owners and the Clearing Agency and/or the Clearing Agency Participants.
     Unless and until Definitive Certificates are issued pursuant to Section
     3.09(c), the initial Clearing Agency will make book-entry transfers among
     the Clearing Agency Participants and receive and transmit distributions of
     principal of and interest on the Book-Entry Certificates to such Clearing
     Agency Participants.

     (b) Whenever notice or other communication to the Certificateholders is
required under this Agreement, unless and until Definitive Certificates shall
have been issued to Certificate Owners pursuant to Section 3.09(c), the Trustee
shall give all such notices and communications specified herein to be given to
Holders of the Book-Entry Certificates to the Clearing Agency.

     (c) If (i) (A) the Depositor advises the Trustee in writing that the
Clearing Agency is no longer willing or able to discharge properly its
responsibilities with respect to the Book-Entry Certificates, and (B) the
Trustee or the Depositor is unable to locate a qualified successor, (ii) the
Depositor, at its option, advises the Trustee in writing that it elects to
terminate the book-entry system through the Clearing Agency or (iii) after the
occurrence of an Event of Default, Certificate Owners representing beneficial
interests aggregating not less than 50% of the Class Principal Amount of a Class
of Book-Entry Certificates identified as such to the Trustee by an Officer's
Certificate from the Clearing Agency advise the Trustee and the Clearing Agency
through the Clearing Agency Participants in writing that the continuation of a
book-entry system through the Clearing Agency is no longer in the best interests
of the Certificate Owners of a Class of Book-Entry Certificates, the Trustee
shall notify or cause the Certificate Registrar to notify the Clearing Agency to
effect notification to all Certificate Owners, through the Clearing Agency, of
the occurrence of any such event and of the availability of Definitive
Certificates to Certificate Owners requesting the same. Upon surrender to the
Trustee of the Book-Entry Certificates by the Clearing Agency, accompanied by
registration instructions from the Clearing Agency for registration, the Trustee
shall issue the Definitive Certificates. Neither the Transferor nor the Trustee
shall be liable for any delay in delivery of such instructions and may
conclusively rely on, and shall be protected in relying on, such instructions.
Upon the issuance of Definitive Certificates all references herein to
obligations imposed upon or to be performed by the Clearing Agency 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.

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                                   ARTICLE IV

                        ADMINISTRATION OF THE TRUST FUND

     Section 4.01. Collection Account.

     (a) On the Closing Date, the Master Servicer shall open and shall
thereafter maintain a segregated account held in trust (the "Collection
Account"), entitled "Aurora Loan Services Inc., as Master Servicer, in trust for
the benefit of the Holders of Structured Asset Securities Corporation Mortgage
Pass-Through Certificates, Series 2001-17." The Collection Account shall relate
solely to the Certificates issued by the Trust Fund hereunder, and funds in such
Collection Account shall not be commingled with any other monies.

     (b) The Collection Account shall be an Eligible Account. If an existing
Collection Account ceases to be an Eligible Account, the Master Servicer shall
establish a new Collection Account that is an Eligible Account within 30 days
and transfer all funds on deposit in such existing Collection Account into such
new Collection Account.

     (c) The Master Servicer shall give to the Trustee prior written notice of
the name and address of the depository institution at which the Collection
Account is maintained and the account number of such Collection Account. No
later than 12:00 p.m. on each Deposit Date, the entire amount on deposit in the
Collection Account (subject to permitted withdrawals set forth in Section 4.02),
excluding such amounts not included in the Available Distribution Amount for
such Distribution Date pursuant to clauses (a) through (g) of paragraph (i) of
the definition thereof, shall be remitted to the Trustee for deposit into the
Certificate Account by wire transfer in immediately available funds. The Master
Servicer, at its option, may choose to make daily remittances from the
Collection Account to the Trustee for deposit into the Certificate Account.

     (d) The Master Servicer shall deposit or cause to be deposited into the
Collection Account, no later than the Business Day following the Closing Date,
any amounts representing Scheduled Payments on the Mortgage Loans due after the
Cut-off Date and received by the Master Servicer on or before the Closing Date.
Thereafter, the Master Servicer shall deposit or cause to be deposited in the
Collection Account on the applicable Remittance Date the following amounts
received or payments made by it (other than in respect of principal of and
interest on the Mortgage Loans due on or before the Cut-Off Date):

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

         (ii) all payments on account of interest on the Mortgage Loans (other
     than payments due prior to the Cut-off Date), net of the applicable
     Servicing Fee and Master Servicing Fee with respect to each such Mortgage
     Loan, but only to the extent of the amount permitted to be withdrawn or
     withheld from the Collection Account in accordance with Sections 5.04 and
     9.21;

         (iii) any unscheduled payment or other recovery with respect to a
     Mortgage Loan not otherwise specified in this paragraph (d), including all
     Net Liquidation Proceeds with respect to the Mortgage Loans and REO
     Property, and all amounts received in

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     connection with the operation of any REO Property, net of any unpaid
     Servicing Fees and Master Servicing Fees with respect to such Mortgage
     Loans, but only to the extent of the amount permitted to be withdrawn or
     withheld from the Collection Account in accordance with Sections 5.04 and
     9.21; provided that if a Servicer is also the Retained Interest Holder with
     respect to any Mortgage Loan, payments on account of interest on the
     Mortgage Loans as to which such Servicer is the Retained Interest Holder
     may also be made net of the related Retained Interest with respect to each
     such Mortgage Loan.

         (iv) all Insurance Proceeds;

         (v) all Advances made by the Master Servicer or any Servicer pursuant
     to Section 5.04 or the applicable Servicing Agreement; and

         (vi) all proceeds of any Mortgage Loan purchased by any Person.

     (e) Funds in the Collection Account may be invested in Eligible Investments
(selected by and at the written direction of the Master Servicer) which shall
mature not later than the earlier of (a) the Deposit Date (except that if such
Eligible Investment is an obligation of the Trustee or the Paying Agent, if
other than the Trustee, and such Collection Account is maintained with the
Trustee or the Paying Agent, if other than the Trustee, then such Eligible
Investment shall mature not later than such applicable Distribution Date) or (b)
the day on which the funds in such Collection Account are required to be
remitted to the Trustee for deposit into the Certificate Account, and any such
Eligible Investment shall not be sold or disposed of prior to its maturity. All
such Eligible Investments shall be made in the name of the Trustee (in its
capacity as such) or its nominee. All income and gain realized from any such
investment shall be for the benefit of the Master Servicer and shall be subject
to its withdrawal on order from time to time, subject to Section 5.05, and shall
not be part of the Trust Fund. The amount of any losses incurred in respect of
any such investments shall be deposited in such Collection Account by the Master
Servicer out of its own funds, without any right of reimbursement therefor,
immediately as realized. The foregoing requirements for deposit in the
Collection Account are exclusive, it being understood and agreed that, without
limiting the generality of the foregoing, payments of interest on funds in the
Collection Account and payments in the nature of late payment charges or
assumption fees need not be deposited by the Master Servicer in the Collection
Account and may be retained by the Master Servicer or the applicable Servicer as
additional servicing compensation. If the Master Servicer deposits in the
Collection Account any amount not required to be deposited therein, it may at
any time withdraw such amount from such Collection Account.

     Section 4.02. Application of Funds in the Collection Account.

     The Master Servicer may, from time to time, make, or cause to be made,
withdrawals from the Collection Account for the following purposes:

         (i) to reimburse itself or any Servicer for Advances made by it or by
     such Servicer pursuant to Section 5.04 or the applicable Servicing
     Agreement; the Master Servicer's right to reimburse itself pursuant to this
     subclause (i) is limited to amounts received on or in respect of particular
     Mortgage Loans (including, for this purpose,

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     Liquidation Proceeds and amounts representing Insurance Proceeds with
     respect to the property subject to the related Mortgage) which represent
     late recoveries (net of the applicable Servicing Fee and the Master
     Servicing Fee) of payments of principal or interest respecting which any
     such Advance was made, it being understood, in the case of any such
     reimbursement, that the Master Servicer's or Servicer's right thereto shall
     be prior to the rights of the Certificateholders;

         (ii) to reimburse itself or any Servicer for any Servicing Advances
     made by it or by such Servicer that it determines in good faith will not be
     recoverable from amounts representing late recoveries of payments of
     principal or interest respecting the particular Mortgage Loan as to which
     such Servicing Advance was made or from Liquidation Proceeds or Insurance
     Proceeds with respect to such Mortgage Loan, it being understood, in the
     case of any such reimbursement, that such Master Servicer's or Servicer's
     right thereto shall be prior to the rights of the Certificateholders;

         (iii) to reimburse itself or any Servicer from Liquidation Proceeds for
     Liquidation Expenses and for amounts expended by it pursuant to Sections
     9.20 and 9.22(a) or the applicable Servicing Agreement in good faith in
     connection with the restoration of damaged property and, to the extent that
     Liquidation Proceeds after such reimbursement exceed the unpaid principal
     balance of the related Mortgage Loan, together with accrued and unpaid
     interest thereon at the applicable Mortgage Rate less the applicable
     Servicing Fee and the Master Servicing Fee for such Mortgage Loan to the
     Due Date next succeeding the date of its receipt of such Liquidation
     Proceeds, to pay to itself out of such excess the amount of any unpaid
     assumption fees, late payment charges or other Mortgagor charges on the
     related Mortgage Loan and to retain any excess remaining thereafter as
     additional servicing compensation, it being understood, in the case of any
     such reimbursement or payment, that such Master Servicer's or Servicer's
     right thereto shall be prior to the rights of the Certificateholders;

         (iv) to reimburse itself or any Servicer for expenses incurred by and
     recoverable by or reimbursable to it or such Servicer pursuant to Section
     9.04, 9.05, 9.06, 9.16 or 9.22(a) or pursuant to the applicable Servicing
     Agreement, and to reimburse itself for any expenses reimbursable to it
     pursuant to Section 10.01(c);

         (v) to pay to the applicable Person, with respect to each Mortgage Loan
     or REO Property acquired in respect thereof that has been repurchased by
     such Person pursuant to this Agreement, all amounts received thereon and
     not distributed on the date on which the related repurchase was effected;

         (vi) subject to Section 5.05, to pay to itself income earned on the
     investment of funds deposited in the Collection Account;

         (vii) on each Deposit Date, to make payments to the Trustee for deposit
     into the Certificate Account the Available Distribution Amount for the
     related Distribution Date;

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         (viii) to make distributions of the Retained Interest to the Retained
     Interest Holder on each Distribution Date (other than any Retained Interest
     not deposited into the Collection Account in accordance with Section
     4.01(d)(iii));

         (ix) to make payment to itself, the Trustee and others pursuant to any
     provision of this Agreement;

         (x) to withdraw funds deposited in error in the Collection Account;

         (xi) to clear and terminate any Collection Account pursuant to Section
     7.02;

         (xii) to reimburse a successor Master Servicer (solely in its capacity
     as successor Master Servicer), for any fee, expense or advance occasioned
     by a termination of the Master Servicer, and the assumption of such duties
     by the Trustee or a successor Master Servicer appointed by the Trustee
     pursuant to Section 6.14, in each case to the extent not reimbursed by the
     terminated Master Servicer, it being understood, in the case of any such
     reimbursement or payment, that the right of the Master Servicer or the
     Trustee thereto shall be prior to the rights of the Certificateholders; and

         (xiii) to reimburse any Servicer for such amounts as are due thereto
     under the applicable Servicing Agreement and have not been retained by or
     paid to such Servicer to the extent provided in such Servicing Agreement.

     If provided in the related Servicing Agreement, each Servicer shall be
entitled to retain as additional servicing compensation any Prepayment Interest
Excess (to the extent not offset by Prepayment Interest Shortfalls).

     Any Prepayment Penalty Amounts shall be distributed to the holder of the
Class P Certificates. The Class E Distributable Amount shall be distributed to
the holder of the Class E Certificates.

     In connection with withdrawals pursuant to subclauses (i), (iii), (iv) and
(vi) above, the Master Servicer's or Servicer's entitlement thereto is limited
to collections or other recoveries on the related Mortgage Loan. The Master
Servicer shall therefore keep and maintain a separate accounting for each
Mortgage Loan it master services for the purpose of justifying any withdrawal
from the Collection Account it maintains pursuant to such subclause (i), (iii),
(iv) and (vi) above.

     Section 4.03. Reports to Certificateholders.

     (a) On each Distribution Date, the Trustee shall have prepared (based
solely on information provided by the Master Servicer) and shall make available
to each Certificateholder and the Certificate Insurer a written report setting
forth the following information, by Mortgage Pool and Certificate Group (on the
basis of Mortgage Loan level information obtained from the Servicers and the
Master Servicer):

         (i) the aggregate amount of the distribution to be made on such
     Distribution Date to the Holders of each Class of Certificates, other than
     any Class of Notional

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     Certificates, and in respect of each Component, to the extent applicable,
     allocable to principal on the Mortgage Loans, including Liquidation
     Proceeds and Insurance Proceeds, stating separately the amount attributable
     to scheduled principal payments and unscheduled payments in the nature of
     principal in each Mortgage Pool;

         (ii) the aggregate amount of the distribution to be made on such
     Distribution Date to the Holders of each Class of Certificates, other than
     any Class of Principal Only Certificates, and in respect of each Component,
     allocable to interest, including any Accrual Amount added to the Class
     Principal Amount of any Class of Accrual Certificates;

         (iii) the amount, if any, of any distribution to the Holders of a
     Residual Certificate;

         (iv) (A) the aggregate amount of any Advances required to be made by or
     on behalf of the Master Servicer or any Servicer (or the Trustee) with
     respect to such Distribution Date, (B) the aggregate amount of such
     Advances actually made, and (C) the amount, if any, by which (A) above
     exceeds (B) above;

         (v) the Aggregate Principal Balance of the Mortgage Loans and the
     Non-AP Pool Balance of each Mortgage Pool for such Distribution Date, after
     giving effect to payments allocated to principal reported under clause (i)
     above;

         (vi) the Class Principal Amount (or Class Notional Amount) of each
     Class of Certificates, to the extent applicable, and the Component
     Principal Amount of each Component as of such Distribution Date after
     giving effect to payments allocated to principal reported under clause (i)
     above (and to the addition of any Accrual Amount in the case of any Class
     of Accrual Certificates), separately identifying any reduction of any of
     the foregoing Certificate Principal Amounts or due to Realized Losses;

         (vii) any Realized Losses realized with respect to the Mortgage Loans
     (x) in the applicable Prepayment Period and (y) in the aggregate since the
     Cut-off Date, stating separately the amount of Special Hazard Losses, Fraud
     Losses and Bankruptcy Losses and the aggregate amount of such Realized
     Losses, and the remaining Special Hazard Loss Amount, Fraud Loss Amount and
     Bankruptcy Loss Amount;

         (viii) the amount of Servicing Fees paid during the Due Period to which
     such distribution relates;

         (ix) the number and aggregate Scheduled Principal Balance of Mortgage
     Loans, as reported to the Trustee by the Master Servicer, (a) remaining
     outstanding (b) delinquent one month, (c) delinquent two months, (d)
     delinquent three or more months, and (e) as to which foreclosure
     proceedings have been commenced as of the close of business on the last
     Business Day of the calendar month immediately preceding the month in which
     such Distribution Date occurs;

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         (x) The deemed principal balance of each REO Property as of the close
     of business on the last Business Day of the calendar month immediately
     preceding the month in which such Distribution Date occurs;

         (xi) with respect to any Mortgage Loan that became an REO Property
     during the preceding calendar month, the principal balance of such Mortgage
     Loan and the number of such Mortgage Loans as of the close of business on
     the last Business Day of the calendar month immediately preceding the month
     in which such Distribution Date occurs;

         (xii) with respect to substitution of Mortgage Loans in the preceding
     calendar month, the Scheduled Principal Balance of each Deleted Mortgage
     Loan, and of each Qualifying Substitute Mortgage Loan;

         (xiii) the aggregate outstanding Interest Shortfalls and Net Prepayment
     Interest Shortfalls, if any, for each Class of Certificates, after giving
     effect to the distribution made on such Distribution Date;

         (xiv) the Certificate Interest Rate or Component Interest Rate
     applicable to such Distribution Date with respect to each Class of
     Certificates and each Component, respectively;

         (xv) if applicable, the amount of any shortfall (i.e., the difference
     between the aggregate amounts of principal and interest which
     Certificateholders would have received if there were sufficient available
     amounts in the Certificate Account and the amounts actually distributed);

         (xvi) any Insured Payments made in respect of Class A4 Guaranteed
     Distributions paid out of the Class A4 Policy Payments Account under the
     Class A4 Certificate Insurance Policy;

         (xvii) any amounts withdrawn from the Class A4 Reserve Fund pursuant to
     Section 4.06 for that Distribution Date; and

         (xviii) any information requested in writing by a Certificateholder for
     any Mortgage Loans that are delinquent three or more months and any REO
     Property held by the Trustee that is reported by the Master Servicer to the
     Trustee.

     In the case of information furnished pursuant to subclauses (i), (ii) and
(vii) above, the amounts shall be expressed as a dollar amount per $1,000 of
original principal amount of Certificates.

     The Trustee will make such report and additional loan level information
(and, at its option, any additional files containing the same information in an
alternative format) available each month to Certificateholders, the Certificate
Insurer and the Rating Agencies via the Trustee's internet website. The
Trustee's internet website shall initially be located at "www.ctslink.com".
Assistance in using the website can be obtained by calling the Trustee's
customer service desk at (301) 815-6600. Such parties that are unable to use the
website are

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entitled to have a paper copy mailed to them via first class mail by calling the
customer service desk and indicating such. The Trustee shall have the right to
change the way such statements are distributed in order to make such
distribution more convenient and/or more accessible to the above parties and the
Trustee shall provide timely and adequate notification to all above parties
regarding any such changes.

     The foregoing information and reports shall be prepared and determined by
the Trustee based solely on Mortgage Loan data provided to the Trustee by the
Master Servicer (in a format agreed to by the Trustee and the Master Servicer)
no later than 12:00 p.m. (noon) Eastern Standard Time four Business Days prior
to the Distribution Date. In preparing or furnishing the Mortgage Loan data to
the Trustee, the Master Servicer shall be entitled to rely conclusively on the
accuracy of the information or data regarding the Mortgage Loans and the related
REO Property that has been provided to the Master Servicer by each Servicer, and
the Master Servicer shall not be obligated to verify, recompute, reconcile or
recalculate any such information or data. The Trustee shall be entitled to
conclusively rely on the Mortgage Loan data provided by the Master Servicer and
shall have no liability for any errors in such Mortgage Loan data.

     (b) Upon the reasonable advance written request of any Certificateholder
that is a savings and loan, bank, insurance company or the Certificate Insurer,
which request, if received by the Trustee, will be promptly forwarded to the
Master Servicer, the Master Servicer shall provide, or cause to be provided,
(or, to the extent that such information or documentation is not required to be
provided by a Servicer under the applicable Servicing Agreement, shall use
reasonable efforts to obtain such information and documentation from such
Servicer, and provide) to such Certificateholder such reports and access to
information and documentation regarding the Mortgage Loans as such
Certificateholder may reasonably deem necessary to comply with applicable
regulations of the Office of Thrift Supervision or its successor or other
regulatory authorities with respect to investment in the Certificates; provided,
however, that the Master Servicer shall be entitled to be reimbursed by such
Certificateholder for such Master Servicer's actual expenses incurred in
providing such reports and access.

     (c) Within 90 days, or such shorter period as may be required by statute or
regulation, after the end of each calendar year, the Trustee shall make
available to each Person who at any time during the calendar year was a
Certificateholder of record, and make available to Certificate Owners
(identified as such by the Clearing Agency) in accordance with applicable
regulations, a report summarizing the items provided to Certificateholders
pursuant to Section 4.03(a) on an annual basis as may be required to enable such
Holders to prepare their federal income tax returns. Such information shall
include the amount of original issue discount accrued on each Class of
Certificates and information regarding the expenses of the Trust Fund. The
Master Servicer shall provide the Trustee with such information as is necessary
for the Trustee to prepare such reports.

     Section 4.04. Certificate Account.

     (a) The Trustee shall establish and maintain in its name, as trustee, a
trust account (the "Certificate Account"), to be held in trust for the benefit
of the Certificateholders and the Certificate Insurer until disbursed pursuant
to the terms of this Agreement. The Certificate Account shall be an Eligible
Account. If the existing Certificate Account ceases to be an

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Eligible Account, the Trustee shall establish a new Certificate Account that is
an Eligible Account within 20 Business Days and transfer all funds on deposit in
such existing Certificate Account into such new Certificate Account. The
Certificate Account shall relate solely to the Certificates issued hereunder and
funds in the Certificate Account shall be held separate and apart from and shall
not be commingled with any other monies including, without limitation, other
monies of the Trustee held under this Agreement.

     (b) The Trustee shall cause to be deposited into the Certificate Account on
the day on which, or, if such day is not a Business Day, the Business Day
immediately following the day on which, any monies are remitted by the Master
Servicer to the Trustee, all such amounts. The Trustee shall make withdrawals
from the Certificate Account only for the following purposes:

         (i) to withdraw amounts deposited in the Certificate Account in error;

         (ii) to pay itself any investment income earned with respect to funds
     in the Certificate Account invested in Eligible Investments as set forth in
     subsection (c) below, and to make payments to itself prior to making
     distributions pursuant to Section 5.02 for any expenses or other
     indemnification owing to the Trustee and others pursuant to any provision
     of this Agreement;

         (iii) to make payments of the Master Servicing Fee (to the extent not
     already withheld or withdrawn from the Collection Account by the Master
     Servicer) to the Master Servicer and to make payments with respect to the
     premium for the Pool PMI Policy to Mortgage Guaranty Insurance Corporation;

         (iv) to make distributions to the Certificateholders and the
     Certificate Insurer pursuant to Article V; and

         (v) to clear and terminate the Certificate Account pursuant to Section
     7.02.

     (c) The Trustee may invest, or cause to be invested, funds held in the
Certificate Account, which funds, if invested, shall be invested in Eligible
Investments (which may be obligations of the Trustee described in paragraph
(viii) of the definition thereof). All such investments must be payable on
demand or mature no later than the next Distribution Date, and shall not be sold
or disposed of prior to their maturity. All such Eligible Investments will be
made in the name of the Trustee (in its capacity as such) or its nominee. All
income and gain realized from any such investment shall be compensation for the
Trustee and shall be subject to its withdrawal on order from time to time. The
amount of any losses incurred in respect of any such investments shall be paid
by the Trustee for deposit in the Certificate Account out of its own funds,
without any right of reimbursement therefor, immediately as realized. Funds held
in the Certificate Account that are not invested shall be held in cash.

     Section 4.05. Determination of LIBOR.

     (a) If the outstanding Certificates include any LIBOR Certificates, then on
each LIBOR Determination Date the Trustee shall determine LIBOR on the basis of
the offered LIBOR quotations of the Reference Banks as of 11:00 a.m. London time
on such LIBOR Determination Date as follows:

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         (i) If on any LIBOR Determination Date two or more of the Reference
     Banks provide such offered quotations, LIBOR for the next Accrual Period
     will be the arithmetic mean of such offered quotations (rounding such
     arithmetic mean if necessary to the nearest five decimal places;

         (ii) If on any LIBOR Determination Date only one or none of the
     Reference Banks provides such offered quotations, LIBOR for the next
     Accrual Period will be whichever is the higher of (x) LIBOR as determined
     on the previous LIBOR Determination Date or (y) the Reserve Interest Rate.
     The "Reserve Interest Rate" will be either (A) the rate per annum which the
     Trustee determines to be the arithmetic mean (rounding such arithmetic mean
     if necessary to the nearest five decimal places) of the one-month
     Eurodollar lending rates that New York City banks selected by the Depositor
     are quoting, on the relevant LIBOR Determination Date, to the principal
     London offices of at least two leading banks in the London interbank market
     or (B) in the event that the Trustee can determine no such arithmetic mean,
     the lowest one-month Eurodollar lending rate that the New York City banks
     selected by the Depositor are quoting on such LIBOR Determination Date to
     leading European banks; and

         (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 (ii) above, LIBOR for the next Accrual Period will be LIBOR as
     determined on the previous LIBOR Determination Date or, in the case of the
     first LIBOR Determination Date, the Initial LIBOR Rate.

     (b) The establishment of LIBOR by the Trustee and the Trustee's subsequent
calculation of the Certificate Interest Rate applicable to the LIBOR
Certificates for the relevant Accrual Period, in the absence of manifest error,
will be final and binding. In all cases, the Trustee may conclusively rely on
quotations of LIBOR for the Reference Banks as such quotations appear on the
display designated "LIBOR" on the Bloomberg Financial Markets Commodities News.

     (c) As used herein, "Reference Banks" shall mean four leading banks engaged
in transactions in Eurodollar deposits in the international Eurocurrency market
(i) with an established place of business in London, England, (ii) whose
quotations appear on the "Bloomberg Screen LIBOR Index Page" (as described in
the definition of LIBOR) on the applicable LIBOR Determination Date and (iii)
which have been designated as such by the Depositor and are able and willing to
provide such quotations to the Depositor on each LIBOR Determination Date. The
Reference Banks initially shall be: Barclay's plc, Bank of Tokyo, National
Westminster Bank and Trust Company and Bankers Trust Company. If any of the
initial Reference Banks should be removed from the Bloomberg Screen LIBOR Index
Page or in any other way fail to meet the qualifications of a Reference Bank,
the Depositor shall use its best efforts to designate alternate Reference Banks.

     (d) If (i) with respect to any LIBOR Determination Date LIBOR is determined
pursuant to clause (a)(iii) of this Section and (ii) on the next succeeding
LIBOR Determination Date LIBOR would, without giving effect to this paragraph
(d), be determined pursuant to such clause (a)(iii), then the Depositor shall
select an alternative interest rate index over which the Depositor has no
control that is used for determining Eurodollar lending rates and is calculated
and

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published (or otherwise made available) by an independent third party, and such
alternative interest rate index shall constitute LIBOR for all purposes hereof.

     Section 4.06. The Class A4 Reserve Fund.

     (a) The Trustee shall establish and maintain the Class A4 Reserve Fund,
which shall be an Eligible Account into which there shall have been deposited
the amount of $5,000 on the Closing Date. No additional funds will be deposited
in the Class A4 Reserve Fund after the Closing Date. All funds deposited in the
Class A4 Reserve Fund, other than investment earnings thereon which shall be
released by the Trustee to Lehman Brothers Inc. from time to time by written
order, shall be held in trust for the benefit of the Holders of the Class A4
Certificates until withdrawn in accordance with Section 5.02(d). The amount of
any losses incurred in respect of any such investments shall be paid by Lehman
Brothers Inc. for deposit in the Class A4 Reserve Fund out of its own funds,
without any right of reimbursement therefor, immediately as realized. The Class
A4 Reserve Fund shall be an "outside reserve fund" under the REMIC Provisions.
Lehman Brothers Inc. shall be the beneficial owner of the Class A4 Reserve Fund
for federal and state income tax purposes. The Trustee, upon the instructions of
the Depositor, may invest, or cause to be invested, funds in the Class A4
Reserve Fund in Eligible Investments (which may be the obligation of the
Trustee).

     (b) The Trustee shall from time to time make withdrawals from the Class A4
Reserve Fund on behalf of the Trust Fund for the following purposes:

         (i) prior to each Distribution Date, to withdraw from the Class A4
     Reserve Fund an amount equal to the lesser of (a) any Net Prepayment
     Interest Shortfalls and any Relief Act Reductions for Pool 1 and Pool 2
     allocable to the Class A4 Certificates for the related Distribution Date,
     and (b) the amount on deposit in the Class A4 Reserve Fund, and remit such
     amount to the Certificate Account for distribution to the Class A4
     Certificateholders on such Distribution Date; and

         (ii) on the earlier of (a) the Distribution Date on which the Class
     Principal Amount of the Class A4 Certificates is reduced to zero and (b)
     the termination of this Agreement pursuant to Section 7.01, to clear and
     terminate the Class A4 Reserve Fund and to pay all amounts on deposit
     therein to Lehman Brothers Inc. at the address supplied by it to the
     Trustee for such purpose.

                                   ARTICLE V

                    DISTRIBUTIONS TO HOLDERS OF CERTIFICATES

     Section 5.01. Distributions Generally.

     (a) Subject to Section 7.01 respecting the final distribution on the
Certificates, on each Distribution Date the Trustee or the Paying Agent shall
make distributions in accordance with this Article V. Such distributions shall
be made by check mailed to each Certificateholder's address as it appears on the
Certificate Register of the Certificate Registrar (which shall initially be the
Trustee) or, upon written request made to the Trustee at least three Business
Days prior to the related Distribution Date to any Certificateholder owning an
aggregate initial Certificate

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Principal Amount of at least $2,500,000, or, in the case of the Notional
Certificates and Principal Only Certificates, a Percentage Interest of more than
25%, by wire transfer in immediately available funds to an account specified in
the request and at the expense of such Certificateholder; provided, however,
that the final distribution in respect of any Certificate shall be made only
upon presentation and surrender of such Certificate at the Corporate Trust
Office. Wire transfers will be made at the expense of the Holder requesting such
wire transfer by deducting a wire transfer fee from the related distribution.
Notwithstanding such final payment of principal of any of the Certificates, each
Residual Certificate will remain outstanding until the termination of each REMIC
and the payment in full of all other amounts due with respect to the Residual
Certificate and at such time such final payment in retirement of any Residual
Certificate will be made only upon presentation and surrender of such
Certificate at the Corporate Trust Office of the Trustee. If any payment
required to be made on the Certificates is to be made on a day that is not a
Business Day, then such payment will be made on the next succeeding Business
Day. Payments to the Certificate Insurer shall in all cases be made by wire
transfer of immediately available funds.

     (b) All distributions or allocations made with respect to
Certificateholders within each Class on each Distribution Date shall be
allocated among the outstanding Certificates in such Class equally in proportion
to their respective initial Certificate Principal Amounts (or initial Notional
Amounts), except for amounts redeemed in respect of the Redemption Certificate
pursuant to Sections 5.06(a) and (d).

     Section 5.02. Distributions from the Certificate Account.

     (a) On each Distribution Date, the Trustee (or the Paying Agent on behalf
of the Trustee) shall withdraw from the Certificate Account the Available
Distribution Amount with respect to each Mortgage Pool, and shall distribute
such amount to the Certificate Insurer and the Holders of record of each Class
of Certificates or Components, in the following order of priority:

         (i) from the Available Distribution Amounts for Pool 1, Pool 3 and Pool
     4, to the payment to the Certificate Insurer the Aggregate Certificate
     Insurance Premium allocable to such pool on the basis of the Component
     Principal Amount of the related Components of the Class A4 Certificates for
     such Distribution Date.

         (ii) from the Available Distribution Amount for each Mortgage Pool, to
     each Class of Senior Certificates of the related Certificate Group, other
     than any related Principal-Only Certificates, and the related Component of
     the Class A4 Certificates, the Accrued Certificate Interest thereon for
     such Distribution Date, as reduced, in each case, by such Class's or
     Component's allocable share of any Net Prepayment Interest Shortfalls for
     the related Mortgage Pool for such Distribution Date); provided, however,
     that any shortfall in available amounts for each Mortgage Pool shall be
     allocated among the Classes of Senior Certificates or Components of the
     related Certificate Group in proportion to the amount of Accrued
     Certificate Interest (as so reduced) that would otherwise be distributable
     thereon; and provided further, that any Accrued Certificate Interest
     allocable to a Class of Accrual Certificates or an Accrual Component shall
     not be distributable

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     thereto until the Distribution Date immediately following the related
     Accretion Termination Date but instead shall be distributable as provided
     in Section 5.02(e).

         (iii) from the Available Distribution Amount for each Mortgage Pool, to
     each Class of Senior Certificates of the related Certificate Group, other
     than any related Principal-Only Certificates, and the related Component of
     the Class A4 Certificates any related Interest Shortfall for such
     Distribution Date; provided, however, that any shortfall in available
     amounts for each Mortgage Pool shall be allocated among the Classes of
     Senior Certificates or Components of the related Certificate Group in
     proportion to the amount of such interest (as so reduced) that would
     otherwise be distributable thereon; and provided further, that any Interest
     Shortfall for any Accrual Certificates or Accrual Component shall not be
     distributable thereto until the Distribution Date immediately following the
     related Accretion Termination Date but instead shall be distributable as
     provided in Section 5.02(e).

         (iv) from the remaining Available Distribution Amount for each Mortgage
     Pool to the Senior Certificates or Components of any Class of Senior
     Certificates of each Certificate Group, other than any related Notional
     Certificates or Notional Components, as set forth in the Senior Principal
     Priorities attached as Exhibit O hereto, without regard to references to
     the word "approximately"; provided that all references to each PAC or TAC
     Principal Amount Schedule shall be deemed to refer to such schedule
     included in the Scheduled Balances Table attached as Exhibit P hereto.

         (v) concurrently, to the Class 1-AP and Class 4-AP Certificates, to the
     extent of the remaining aggregate Available Distribution Amount for Pool 1
     and Pool 4, the related Class AP Deferred Amount, respectively, for such
     Distribution Date; provided however, that distributions pursuant to this
     priority shall not exceed the aggregate Subordinate Principal Distribution
     Amount for such Mortgage Pools for such Distribution Date, and shall not
     reduce the Class Principal Amount of the Class 1-AP and Class 4-AP
     Certificates and provided further, that if the aggregate Subordinate
     Principal Distribution Amount for Pool 1 and Pool 4 is less than the
     aggregate Class AP Deferred Amount for the Class 1-AP and Class 4-AP
     Certificates, the remaining aggregate Available Distribution Amount for
     Pool 1 and Pool 4 shall be distributed pro rata to the Class 1-AP and Class
     4-AP Certificates on the basis of their respective Class AP Deferred
     Amounts;

         (vi) concurrently, to the Class 3-AP Certificates and the 2-A5(6)
     Component, to the extent of the remaining Available Distribution Amount for
     the related Mortgage Pool, the related Class AP Deferred Amount, for such
     Distribution Date; provided however, that distributions pursuant to this
     priority shall not exceed the Subordinate Principal Distribution Amount for
     the related Mortgage Pool for such Distribution Date, and shall not reduce
     the Class Principal Amount or Component Principal Amount of the Class 3-AP
     Certificates and the 2-A5(6) Component, respectively;

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         (vii) from the Available Distribution Amount for Pool 1, Pool 3 and
     Pool 4, to the Certificate Insurer any unreimbursed Insured Payments plus
     all amounts due to the Certificate Insurer under the Insurance Agreement,
     together with interest thereon at the rate specified in the Insurance
     Agreement (collectively, the "Reimbursement Amounts"); and

         (viii) to the extent of the remaining Available Distribution Amount for
     each Mortgage Pool (or in the case of the B1(1-4), B2(1-4), B3(1-4),
     B4(1-4), B5(1-4) and B6(1-4) Components, Available Distribution Amounts),
     to the related Subordinate Components, as follows(subject, in the case of
     Pool 1 and Pool 4, to prior distribution pursuant to paragraph (f) of this
     section 5.02):

            (A) to the extent of the remaining aggregate Available Distribution
         Amount for Pool 1 and Pool 4 to the B1(1-4) Component of the following
         amounts, in the following order of priority: (x) Accrued Certificate
         Interest thereon (as reduced by any Net Prepayment Interest Shortfalls
         for the related Mortgage Pool allocated to that Component on that
         Distribution Date), (y) any outstanding Interest Shortfalls previously
         allocated to that Component, and (z) such Component's Subordinate
         Component Percentage of the aggregate Subordinate Principal
         Distribution Amount for Pool 1 and Pool 4 for that Distribution Date,
         except as provided below, in reduction of the Component Principal
         Amounts thereof;

            (B) to the extent of the remaining aggregate Available Distribution
         Amount for Pool 1 and Pool 4 to the B2(1-4) Component of the following
         amounts, in the following order of priority: (x) Accrued Certificate
         Interest thereon (as reduced by any Net Prepayment Interest Shortfalls
         for the related Mortgage Pool allocated to that Component on that
         Distribution Date), (y) any outstanding Interest Shortfalls previously
         allocated to that Component, and (z) such Component's Subordinate
         Component Percentage of the aggregate Subordinate Principal
         Distribution Amount for Pool 1 and Pool 4 for that Distribution Date,
         except as provided below, in reduction of the Component Principal
         Amounts thereof;

            (C) to the extent of the remaining aggregate Available Distribution
         Amount for Pool 1 and Pool 4 to the B3(1-4) Component of the following
         amounts, in the following order of priority: (x) Accrued Certificate
         Interest thereon (as reduced by any Net Prepayment Interest Shortfalls
         for the related Mortgage Pool allocated to that Component on that
         Distribution Date), (y) any outstanding Interest Shortfalls previously
         allocated to that Component, and (z) such Component's Subordinate
         Component Percentage of the aggregate Subordinate Principal
         Distribution Amount for Pool 1 and Pool 4 or that Distribution Date,
         except as provided below, in reduction of the Component Principal
         Amounts thereof;

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            (D) to the extent of the remaining aggregate Available Distribution
         Amount for Pool 1 and Pool 4 to the B4(1-4) Component of the following
         amounts, in the following order of priority: (x) Accrued Certificate
         Interest thereon (as reduced by any Net Prepayment Interest Shortfalls
         for the related Mortgage Pool allocated to that Component on that
         Distribution Date), (y) any outstanding Interest Shortfalls previously
         allocated to that Component, and (z) such Component's Subordinate
         Component Percentage of the aggregate Subordinate Principal
         Distribution Amount for Pool 1 and Pool 4 for that Distribution Date,
         except as provided below, in reduction of the Component Principal
         Amounts thereof;

            (E) to the extent of the remaining aggregate Available Distribution
         Amount for Pool 1 and Pool 4 to the B5(1-4) Component of the following
         amounts, in the following order of priority: (x) Accrued Certificate
         Interest thereon (as reduced by any Net Prepayment Interest Shortfalls
         for the related Mortgage Pool allocated to that Component on that
         Distribution Date), (y) any outstanding Interest Shortfalls previously
         allocated to that Component, and (z) such Component's Subordinate
         Component Percentage of the aggregate Subordinate Principal
         Distribution Amount for Pool 1 and Pool 4 for that Distribution Date,
         except as provided below, in reduction of the Component Principal
         Amounts thereof;

            (F) to the extent of the remaining aggregate Available Distribution
         Amount for Pool 1 and Pool 4 to the B6(1-4) Component of the following
         amounts, in the following order of priority: (x) Accrued Certificate
         Interest thereon (as reduced by any Net Prepayment Interest Shortfalls
         for the related Mortgage Pool allocated to that Component on that
         Distribution Date), (y) any outstanding Interest Shortfalls previously
         allocated to that Component, and (z) such Component's Subordinate
         Component Percentage of the aggregate Subordinate Principal
         Distribution Amount for Pool 1 and Pool 4 for that Distribution Date,
         except as provided below, in reduction of the Component Principal
         Amounts thereof;

            (G) to the extent of the remaining Available Distribution Amount for
         Pool 2, to the Class B1(2) Component of the following amounts, in the
         following order of priority: (x) Accrued Certificate Interest thereon
         (as reduced by any Net Prepayment Interest Shortfalls for the related
         Mortgage Pool allocated to that Component on that Distribution Date),
         (y) any outstanding Interest Shortfalls previously allocated to that
         Component, and (z) that Component's Subordinate Component Percentage of
         the Subordinate Principal Distribution Amount for Pool 2 for that
         Distribution Date, except as provided below, in reduction of the
         Component Principal Amounts thereof;

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            (H) to the extent of the remaining Available Distribution Amount for
         Pool 2, to the Class B2(2) Component of the following amounts, in the
         following order of priority: (x) Accrued Certificate Interest thereon
         (as reduced by any Net Prepayment Interest Shortfalls for the related
         Mortgage Pool allocated to that Component on that Distribution Date),
         (y) any outstanding Interest Shortfalls previously allocated to that
         Component, and (z) that Component's Subordinate Component Percentage of
         the Subordinate Principal Distribution Amount for Pool 2 for that
         Distribution Date, except as provided below, in reduction of the
         Component Principal Amounts thereof;

            (I) to the extent of the remaining Available Distribution Amount for
         Pool 2, to the Class B3(2) Component of the following amounts, in the
         following order of priority: (x) Accrued Certificate Interest thereon
         (as reduced by any Net Prepayment Interest Shortfalls for the related
         Mortgage Pool allocated to that Component on that Distribution Date),
         (y) any outstanding Interest Shortfalls previously allocated to that
         Component, and (z) that Component's Subordinate Component Percentage of
         the Subordinate Principal Distribution Amount for Pool 2 for that
         Distribution Date, except as provided below, in reduction of the
         Component Principal Amounts thereof;

            (J) to the extent of the remaining Available Distribution Amount for
         Pool 2, to the Class B4(2) Component of the following amounts, in the
         following order of priority: (x) Accrued Certificate Interest thereon
         (as reduced by any Net Prepayment Interest Shortfalls for the related
         Mortgage Pool allocated to that Component on that Distribution Date),
         (y) any outstanding Interest Shortfalls previously allocated to that
         Component, and (z) that Component's Subordinate Component Percentage of
         the Subordinate Principal Distribution Amount for Pool 2 for that
         Distribution Date, except as provided below, in reduction of the
         Component Principal Amounts thereof;

            (K) to the extent of the remaining Available Distribution Amount for
         Pool 2, to the Class B5(2) Component of the following amounts, in the
         following order of priority: (x) Accrued Certificate Interest thereon
         (as reduced by any Net Prepayment Interest Shortfalls for the related
         Mortgage Pool allocated to that Component on that Distribution Date),
         (y) any outstanding Interest Shortfalls previously allocated to that
         Component, and (z) that Component's Subordinate Component Percentage of
         the Subordinate Principal Distribution Amount for Pool 2 for that
         Distribution Date, except as provided below, in reduction of the
         Component Principal Amounts thereof;

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            (L) to the extent of the remaining Available Distribution Amount for
         Pool 2, to the Class B6(2) Component of the following amounts, in the
         following order of priority: (x) Accrued Certificate Interest thereon
         (as reduced by any Net Prepayment Interest Shortfalls for the related
         Mortgage Pool allocated to that Component on that Distribution Date),
         (y) any outstanding Interest Shortfalls previously allocated to that
         Component, and (z) that Component's Subordinate Component Percentage of
         the Subordinate Principal Distribution Amount for Pool 2 for that
         Distribution Date, except as provided below, in reduction of the
         Component Principal Amounts thereof;

            (M) to the extent of the remaining Available Distribution Amount for
         Pool 3, to the B1(3) Component of the following amounts, in the
         following order of priority: (x) Accrued Certificate Interest thereon
         (as reduced by any Net Prepayment Interest Shortfalls for the related
         Mortgage Pool allocated to that Component on that Distribution Date),
         (y) any outstanding Interest Shortfalls previously allocated to that
         Component, and (z) such Component's Subordinate Component Percentage of
         the Subordinate Principal Distribution Amount for Pool 3 for that
         Distribution Date, except as provided below, in reduction of the
         Component Principal Amounts thereof;

            (N) to the extent of the remaining Available Distribution Amount for
         Pool 3, to the B2(3) Component of the following amounts, in the
         following order of priority: (x) Accrued Certificate Interest thereon
         (as reduced by any Net Prepayment Interest Shortfalls for the related
         Mortgage Pool allocated to that Component on that Distribution Date),
         (y) any outstanding Interest Shortfalls previously allocated to that
         Component, and (z) such Component's Subordinate Component Percentage of
         the Subordinate Principal Distribution Amount for Pool 3 for that
         Distribution Date, except as provided below, in reduction of the
         Component Principal Amounts thereof;

            (O) to the extent of the remaining Available Distribution Amount for
         Pool 3, to the B3(3) Component of the following amounts, in the
         following order of priority: (x) Accrued Certificate Interest thereon
         (as reduced by any Net Prepayment Interest Shortfalls for the related
         Mortgage Pool allocated to that Component on that Distribution Date),
         (y) any outstanding Interest Shortfalls previously allocated to that
         Component, and (z) such Component's Subordinate Component Percentage of
         the Subordinate Principal Distribution Amount for Pool 3 for that
         Distribution Date, except as provided below, in reduction of the
         Component Principal Amounts thereof;

            (P) to the extent of the remaining Available Distribution Amount for
         Pool 3, to the B4(3) Component of the following amounts, in

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         the following order of priority: (x) Accrued Certificate Interest
         thereon (as reduced by any Net Prepayment Interest Shortfalls for the
         related Mortgage Pool allocated to that Component on that Distribution
         Date), (y) any outstanding Interest Shortfalls previously allocated to
         that Component, and (z) such Component's Subordinate Component
         Percentage of the Subordinate Principal Distribution Amount for Pool 3
         for that Distribution Date, except as provided below, in reduction of
         the Component Principal Amounts thereof;

            (Q) to the extent of the remaining Available Distribution Amount for
         Pool 3, to the B5(3) Component of the following amounts, in the
         following order of priority: (x) Accrued Certificate Interest thereon
         (as reduced by any Net Prepayment Interest Shortfalls for the related
         Mortgage Pool allocated to that Component on that Distribution Date),
         (y) any outstanding Interest Shortfalls previously allocated to that
         Component, and (z) such Component's Subordinate Component Percentage of
         the Subordinate Principal Distribution Amount for Pool 3 for that
         Distribution Date, except as provided below, in reduction of the
         Component Principal Amounts thereof; and

            (R) to the extent of the remaining Available Distribution Amount for
         Pool 3, to the B6(3) Component of the following amounts, in the
         following order of priority: (x) Accrued Certificate Interest thereon
         (as reduced by any Net Prepayment Interest Shortfalls for the related
         Mortgage Pool allocated to that Component on that Distribution Date),
         (y) any outstanding Interest Shortfalls previously allocated to that
         Component, and (z) such Component's Subordinate Component Percentage of
         the Subordinate Principal Distribution Amount for Pool 3 for that
         Distribution Date, except as provided below, in reduction of the
         Component Principal Amounts thereof.

     (b) If on any Distribution Date the Component Principal Amount of each
Component relating to a Mortgage Pool has been reduced to zero (or in the case
of Pool 1 and 4, the Component Principal Amount of the B(1-4) Components have
been reduced to zero), the Available Distribution Amount with respect to the
related Mortgage Pool or Mortgage Pools remaining after distribution of interest
to the related Senior Certificates on such date shall be distributed among the
related Classes and Component of Senior Certificates proportionately, on the
basis of their respective Class (or Component) Principal Amounts immediately
prior to such Distribution Date, regardless of the priorities and amounts set
forth in Section 5.02(a). Net Prepayment Interest Shortfalls for each Mortgage
Pool shall be allocated among the Certificates and Components of the related
Certificate Group (other than any related Principal Only Certificates) pro rata
based on (i) in the case of the related Non-AP Senior Certificates and the
Subordinate Components related to Group 2 and Group 3, the Accrued Certificate
Interest otherwise distributable thereon, and (ii) in the case of the
Subordinate Components related to Group 1 and Group 4, interest accrued on the
related Apportioned Principal Balances.

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     (c) If on any Distribution Date the Credit Support Percentage for any
Component of the Class B1 Certificates is less than the Original Credit Support
Percentage for such Component, then, notwithstanding anything to the contrary in
Section 5.02(a), no distribution of amounts described in clauses (ii) and (iii)
of the definition of Subordinate Principal Distribution Amount for the related
Mortgage Pool (or Mortgage Pools, in the case of Pool 1 and Pool 4), will be
made in respect of the Components of the Class B2, Class B3, Class B4, Class B5
or Class B6 Certificates having the same parenthetical designation as such
Component on such Distribution Date. (ii) If on any Distribution Date the Credit
Support Percentage for any Component of the Class B2 Certificates is less than
the Original Credit Support Percentage for such Component, then, notwithstanding
anything to the contrary in Section 5.02(a), no distribution of amounts
described in clauses (ii) and (iii) of the definition of Subordinate Principal
Distribution Amount for the related Mortgage Pool (or Mortgage Pools in the case
of Pool 1 and Pool 4) will be made in respect of the Component of the Class B3,
Class B4, Class B5 or Class B6 Certificates having the same parenthetical
designation as such Component on such Distribution Date. (iii) If on any
Distribution Date the Credit Support Percentage for any Component of the Class
B3 Certificates is less than the Original Credit Support Percentage for such
Component, then, notwithstanding anything to the contrary in Section 5.02(a), no
distribution of amounts described in clauses (ii) and (iii) of the definition of
Subordinate Principal Distribution Amount for the related Mortgage Pool (or
Mortgage Pools, in the case of Pool 1 and Pool 4) will be made in respect of the
Component of the Class B4, Class B5 or Class B6 Certificates having the same
parenthetical designation as such Component on such Distribution Date. (iv) If
on any Distribution Date the Credit Support Percentage for any Component of the
Class B4 Certificates is less than the Original Credit Support Percentage for
such Component, then, notwithstanding anything to the contrary in Section
5.02(a), no distribution of amounts described in clauses (ii) and (iii) of the
definition of Subordinate Principal Distribution Amount for the related Mortgage
Pool (or Mortgage Pools, in the case of Pool 1 and Pool 4) will be made in
respect of the Component of the Class B5 or Class B6 Certificates having the
same parenthetical designation as such Component on such Distribution Date. (v)
If on any Distribution Date the Credit Support Percentage for any Component of
the Class B5 Certificates is less than the Original Credit Support Percentage
for such Component, then, notwithstanding anything to the contrary in Section
5.02(a), no distribution of amounts described in clauses (ii) and (iii) of the
definition of Subordinate Principal Distribution Amount for the related Mortgage
Pool (or Mortgage Pools, in the case of Pool 1 and Pool 4) shall be made in
respect of the Component of the Class B6 Certificates having the same
parenthetical designation as such Component on such Distribution Date.

     Any amount not distributed in respect of any Subordinate Component on any
Distribution Date pursuant to the immediately preceding paragraph shall be
allocated among the remaining Subordinate Components having the same
parenthetical designation (or including the same designation) as such Class or
Subordinate Component in proportion to their respective Class Principal Amounts
or Component Principal Amounts, as applicable.

     (d) On each Distribution Date, the Trustee shall distribute to the Holder
of the Class R Certificate any amounts remaining in the Upper Tier REMIC for
such Distribution Date after application of all amounts described in paragraph
(a) of this Section 5.02. Any distributions pursuant to this paragraph (d) shall
not reduce the Class Principal Amount of the Class R Certificate.

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     (e) On each Distribution Date, the combined Accrual Amount for such date
shall be distributed in reduction of the Class Principal Amounts (or Component
Notional Amounts) of the specified Classes and Components in accordance with
priorities set forth in Exhibit O, and an equal amount will be added to the
Class Principal Amount or Component Principal Amount of the Class 2-A11
Certificates and the 2-A5(5) Component.

     (f) On each Distribution Date prior to the Credit Support Depletion Date
for Certificate Group 1 and Certificate Group 4 but on or after the date on
which the aggregate Certificate Principal Amount of the Non-AP Senior
Certificates of (including the related Component of the Class A4 Certificates)
either Certificate Group 1 or Certificate Group 4 has been reduced to zero,
amounts otherwise distributable as principal on each of the B1(1-4), B2(1-4),
B3(1-4), B4(1-4), B5(1-4) and B6(1-4) Components pursuant to Section
5.02(a)(viii), in reverse order of priority, in respect of such Component's
allocable share of the Subordinate Principal Distribution Amount for Pool 1 and
Pool 4 shall be distributed as principal to such Non-AP Senior Certificates and
the related Component of the Class A4 Certificates (other than any Notional
Certificates) remaining outstanding in Certificate Group 1 or Certificate Group
4, as applicable, until the Class Principal Amounts and Component Principal
Amounts thereof have been reduced to zero, provided that on such Distribution
Date (a) the Group 1-4 Subordinate Percentage for such Distribution Date is less
than 200% of the Group 1-4 Subordinate Percentage as of the Cut-off Date or (b)
the average outstanding principal balance of the Mortgage Loans in either Pool 1
or Pool 4 that are delinquent 60 days or more over the last six months as a
percentage of the related Group Subordinate Amount is greater than or equal to
50%.

            (i) On any Distribution Date on which either Certificate Group 1 or
         Certificate Group 4 constitutes an Undercollateralized Group, all
         amounts otherwise distributable as principal on the B1(1-4), B2(1-4),
         B3(1-4), B4(1-4), B5(1-4) and B6(1-4) Components, in reverse order of
         priority (other than amounts necessary to pay Class AP Deferred Amounts
         or unpaid Interest Shortfalls) (or, following the Credit Support
         Depletion Date for Pool 1 and Pool 4, such other amounts described in
         the immediately following sentence), will be distributed as principal
         to the Non-AP Senior Certificates (including the related Component of
         the Class A4 Certificate but excluding any Notional Certificate) of
         such Undercollateralized Group, until the sum of the aggregate
         Certificate Principal Amount of such Non-AP Senior Certificates and the
         Component Principal Amount of the related Component of the Class A4
         Certificate equals the Non-AP Pool Balance of the related Mortgage Pool
         (such distribution, an "Undercollateralization Distribution"). If
         Certificate Group 1 or Certificate Group 4 constitutes an
         Undercollateralized Group on any Distribution Date following the Credit
         Support Depletion Date for Pool 1 and Pool 4, Undercollateralization
         Distributions will be made from any Available Distribution Amount for
         the other such Mortgage Pool not related to an Undercollateralized
         Group remaining after all required amounts have been distributed to the
         Non-AP Senior Certificates and the related Class A4 Component of such
         other Certificate Group. In addition, the amount of any unpaid Interest
         Shortfalls with respect to the Undercollateralized Group on any
         Distribution Date (including any

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         Interest Shortfalls for such Distribution Date) will be distributed to
         the Non-AP Senior Certificates and the related Class A4 Component of
         such Undercollateralized Group prior to the payment of any
         Undercollateralization Distributions from amounts otherwise
         distributable as principal on the B1(1-4), B2(1-4), B3(1-4), B4(1-4),
         B5(1-4) and B6(1-4) Components, in reverse order of priority (or,
         following the Credit Support Depletion Date, as provided in the
         preceding sentence hereof).

     Section 5.03. Allocation of Realized Losses.

     (a) On any Distribution Date, (x) the applicable AP Percentage of the
principal portion of each Realized Loss (other than any Excess Loss) in respect
of a Mortgage Loan will be allocated to the related Class of AP Certificates (or
in the case of Pool 2, the 2-A5(6) Component) until the Class Principal Amount
or Component Principal Amount thereof has been reduced to zero; and (y) the
applicable Non-AP Percentage of the principal portion of each Realized Loss
(other than any Excess Loss) in respect of a Mortgage Loan shall be allocated in
the following order of priority:

            first, to the related Component of the Class B6 Certificates, until
         the Component Principal Amount thereof has been reduced to zero;

            second, to the related Component of the Class B5 Certificates, until
         the Component Principal Amount thereof has been reduced to zero;

            third, to the related Component of the Class B4 Certificates, until
         the Component Principal Amount thereof has been reduced to zero;

            fourth, to the related Component of the Class B3 Certificates, until
         the Component Principal Amount thereof has been reduced to zero;

            fifth, to the related Component of the Class B2 Certificates, until
         the Component Principal Amount thereof has been reduced to zero;

            sixth, to the related Component of the Class B1 Certificates, until
         the Principal Amount thereof has been reduced to zero; and

            seventh, to the Classes of Senior Certificates or Components (other
         than the related Principal Only Certificates or Principal Only
         Components) of the related Certificate Group, pro rata, in accordance
         with their Class Principal Amounts or Component Principal Amounts;
         provided, however, that all losses that would otherwise be allocable to
         the Class 2-A5 Certificates (other than in respect of 2-A5(6)
         Component) will be allocated instead to the Class 2-A12 Certificates,
         until the Class Principal Amount thereof has been reduced to zero; and
         provided, further, that any such loss allocated to any Class of Accrual
         Certificates (or any Accrual Component) shall be allocated (subject to
         Section 5.03(c)) on the basis of the lesser of (x) the Class Principal
         Amount (or Component Principal

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         Amount) thereof immediately prior to the applicable Distribution Date
         and (y) the Class Principal Amount (or Component Principal Amount)
         thereof on the Closing Date (as reduced by any Realized Losses
         previously allocated thereto).

     (b) With respect to any Distribution Date, (i) the applicable Non-AP
Percentage of the principal portion of any Excess Loss (other than a Debt
Service Reduction) in respect of a Mortgage Loan in Pool 1 shall be allocated,
pro rata, to the Non-AP Senior Certificates of Certificate Group 1 and the A4(1)
Component based on the respective Class Principal Amounts and Component
Principal Amounts thereof, and to the B1(1-4), B2(1-4), B3(1-4), B4(1-4),
B5(1-4) and B6(1-4) Components on the basis of their Apportioned Principal
Balances; (ii) the applicable Non-AP Percentage of the principal portion of any
Excess Loss (other than a Debt Service Reduction) in respect of a Mortgage Loan
in Pool 2 shall be allocated, pro rata, to the Non-AP Senior Certificates and
Components of Certificate Group 2 (other than in respect of the 2-A5(6)
Component) based on their respective Class Principal Amounts and Component
Principal Amounts, and to the B1(2), B2(2), B3(2), B4(2), B5(2) and B6(2)
Components on the basis of their Component Principal Amounts, and Senior
Percentage; (iii) the applicable Non-AP Percentage of the principal portion of
any Excess Loss (other than a Debt Service Reduction) in respect of a Mortgage
Loan in Pool 3 shall be allocated, pro rata, to the Non-AP Senior Certificates
and Components of Certificate Group 3 and the A4(3) Component based on their
respective Class Principal Amounts and Component Principal Amounts, and to the
B1(3), B2(3), B3(3), B4(3), B5(3) and B6(3) Components on the basis of their
Component Principal Amounts and (iv) the applicable Non-AP Percentage of the
principal portion of any Excess Loss (other than a Debt Service Reduction) in
respect of a Mortgage Loan in Pool 4 shall be allocated, pro rata, to the Non-AP
Senior Certificates of Certificate Group 4 and the A4(4) Component based on the
respective Class Principal Amounts and Component Principal Amounts thereof, and
to the B1(1-4), B2(1-4), B3(1-4), B4(1-4), B5(1-4) and B6(1-4) Components on the
basis of the Apportioned Principal Balances; provided, that any such loss
allocated to any Class of Accrual Certificates (and any Accrual Component) shall
be allocated (subject to Section 5.03(c)) on the basis of the lesser of (x) the
Class Principal Amount (or Component Principal Amount) thereof immediately prior
to the applicable Distribution Date and (y) the Class Principal Amount (or
Component Principal Amount) thereof on the Closing Date (as reduced by any
Realized Losses previously allocated thereto) and provided, further that the
principal portion of any Excess Loss (other than a Debt Service Reduction)
allocable to the Class 2-A5 Certificates shall instead be allocated to the Class
2-A12 Certificates until the Class Principal Amount thereof has been reduced to
zero. The applicable AP Percentage of the principal portion of an Excess Loss in
a Mortgage Pool shall be applied to the related Class of Principal Only
Certificates or Components until the Class Principal Amount or Component
Principal Amount thereof has been reduced to zero.

     The applicable AP Percentage of the principal portion of any Excess Loss
(other than a Debt Service Reduction) on a Mortgage Loan in Pool 1, Pool 3 or
Pool 4 for any Distribution Date shall be allocated to the related Class of
Class AP Certificates (or, in the case of Pool 2, the 2-A5(6) Component).

     (c) Any Realized Losses allocated to a Class of Certificates pursuant to
Section 5.03(a) or (b) shall be allocated among the Certificates of such Class
in proportion to their respective Certificate Principal Amounts. In addition,
any Realized Losses allocated to any Class of Component Certificates on a
Distribution Date shall be allocated in reduction of the Component Principal
Amounts of the related Components (other than any Notional Component) in
proportion to their respective Component Principal Amounts immediately prior to
such

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Distribution Date. Any allocation of Realized Losses pursuant to this paragraph
(c) shall be accomplished by reducing the Certificate Principal Amount (or, in
the case of any Component, the Component Principal Amount) of the related
Certificates (or Components) on the related Distribution Date in accordance with
Section 5.03(d).

     (d) Realized Losses allocated in accordance with this Section 5.03 shall be
allocated on the Distribution Date in the month following the month in which
such loss was incurred and, in the case of the principal portion thereof, after
giving effect to distributions made on such Distribution Date, except that the
aggregate amount of Realized Losses to be allocated to the Principal Only
Certificates on such Distribution Date will be taken into account in determining
distributions in respect of any related Class AP Deferred Amount for such date.

     (e) On each Distribution Date, any Component Writedown Amount for such date
shall effect a corresponding reduction in the Component Principal Amount of the
lowest ranking related Component, which reduction shall occur on such
Distribution Date after giving effect to distributions made on such Distribution
Date.

     (f) In the event that there is a recovery of an amount in respect of
principal of a Mortgage Loan, which amount had previously been allocated as a
Realized Loss to one or more Classes or Components of Certificates, each
outstanding Class or Component to which any portion of such Realized Loss had
previously been allocated shall be entitled to receive, on the Distribution Date
in the month following the month in which such recovery is received, its pro
rata share (based on the Class Principal Amount thereof) of such recovery, up to
the amount of the portion of such Realized Loss previously allocated to such
Class or Component. In the event that the total amount of such recovery exceeds
the amount of Realized Loss allocated to the outstanding Classes or Components
in accordance with the preceding provisions, each outstanding Class of
Certificates or Component shall be entitled to receive its pro rata share of the
amount of such excess, up to the amount of any unrecovered Realized Loss
previously allocated to such Class or Component. Any such recovery allocated to
a Class of Certificates shall not further reduce the Certificate Principal
Amount or Component Principal Amount of such Certificate. Any such amounts not
otherwise allocated to any Class of Certificates pursuant to this subsection
shall be treated as Principal Prepayments for purposes of this Agreement.

     Section 5.04. Advances by Master Servicer and the Trustee.

     (a) Advances shall be made in respect of each Deposit Date as provided
herein. If, on any Determination Date, the Master Servicer determines that any
Scheduled Payments due during the related Due Period (other than Balloon
Payments) have not been received, the Master Servicer shall, or cause the
applicable Servicer to, advance such amount, less an amount, if any, to be set
forth in an Officer's Certificate to be delivered to the Trustee on such
Determination Date, which if advanced the Master Servicer or the applicable
Servicer has determined would not be recoverable from amounts received with
respect to such Mortgage Loan, including late payments, Liquidation Proceeds,
Insurance Proceeds or otherwise. If the Master Servicer determines that an
Advance is required, it shall on the Deposit Date immediately following such
Determination Date either (i) remit to the Trustee from its own funds (or funds
advanced by the applicable Servicer) for deposit in the Certificate Account
immediately available funds in an amount equal to such Advance, (ii) cause to be
made an appropriate entry in the records of the

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Collection Account that funds in such account being held for future distribution
or withdrawal have been, as permitted by this Section 5.04, used by the Master
Servicer to make such Advance, and remit such immediately available funds to the
Trustee for deposit in the Certificate Account or (iii) make Advances in the
form of any combination of clauses (i) and (ii) aggregating the amount of such
Advance. Any funds being held in the Collection Account for future distribution
to Certificateholders and so used shall be replaced by the Master Servicer from
its own funds by remittance to the Trustee for deposit in the Certificate
Account on or before any future Deposit Date to the extent that funds in the
Certificate Account on such Deposit Date shall be less than payments to
Certificateholders required to be made on the related Distribution Date. The
Master Servicer and each Servicer shall be entitled to be reimbursed from the
Collection Account for all Advances made by it as provided in Section 4.02.

     (b) In the event that the Master Servicer fails for any reason to make an
Advance required to be made pursuant to Section 5.04(a) on or before the Deposit
Date, the Trustee, solely in its capacity as successor Master Servicer pursuant
to Section 6.14, shall, on or before the related Distribution Date, deposit in
the Certificate Account an amount equal to the excess of (a) Advances required
to be made by the Master Servicer that would have been deposited in such
Certificate Account over (b) the amount of any Advance made by the Master
Servicer with respect to such Distribution Date; provided, however, that the
Trustee shall be required to make such Advance only if it is not prohibited by
law from doing so and it has determined that such Advance would be recoverable
from amounts to be received with respect to such Mortgage Loan, including late
payments, Liquidation Proceeds, Insurance Proceeds, or otherwise. The Trustee
shall be entitled to be reimbursed from the Certificate Account for Advances
made by it pursuant to this Section 5.04 as if it were the Master Servicer.

     Section 5.05. Compensating Interest Payments.

     The amount of the Master Servicing Fee payable to the Master Servicer in
respect of any Distribution Date shall be reduced by the amount of any
Compensating Interest Payment for such Distribution Date. Such amount shall not
be treated as an Advance and shall not be reimbursable to the Master Servicer.

     Section 5.06. Distributions of Principal on Redemption Certificates.

     (a) Except as provided in subclauses (d) and (f) below, on each
Distribution Date on which distributions in reduction of the Class Principal
Amount of a Class of Redemption Certificates are made, such distributions will
be made in the following order of priority:

         (i) any request by the personal representative of a Deceased Holder or
     by a surviving tenant by the entirety, by a surviving joint tenant or by a
     surviving tenant in common or other Person empowered to act on behalf of
     such Deceased Holder upon his or her death, in an amount up to but not
     exceeding $100,000 per request; and

         (ii) any request by a Living Holder, in an amount up to but not
     exceeding $10,000 per request.

     Thereafter, distributions will be made as provided in clauses (i) and (ii)
above up to a second $100,000 and $10,000 per request, respectively. This
sequence of priorities will be

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repeated for each request for principal distributions made by the Certificate
Owners of a Class of Redemption Certificates until all such requests have been
honored.

     Requests for distributions in reduction of the Certificate Principal
Amounts of Redemption Certificates presented on behalf of Deceased Holders in
accordance with the provisions of clause (i) above will be accepted in the order
of their receipt by the Clearing Agency. Requests for distributions in reduction
of the Certificate Principal Amounts of Redemption Certificates presented in
accordance with the provisions of clause (ii) above will be accepted in the
order of priority established by the random lot procedures of the Clearing
Agency after all requests with respect to such Class presented in accordance
with clause (i) have been honored. All requests for distributions in reduction
of the Class Principal Amount of a Class of Redemption Certificates with respect
to any Distribution Date shall be made in accordance with Section 5.06(c) below
and must be received by the Clearing Agency and forwarded to, and received by,
the Trustee no later than the close of business on the related Record Date.
Requests for distributions that are received by the Clearing Agency and
forwarded to the Trustee after the related Record Date and requests, in either
case, for distributions timely received but not accepted with respect to any
Distribution Date, will be treated as requests for distributions in reduction of
the Class Principal Amount of the applicable Class of Redemption Certificates on
the next succeeding Distribution Date, and each succeeding Distribution Date
thereafter, until each such request is accepted or is withdrawn as provided in
Section 5.06(c). Such requests as are not so withdrawn shall retain their order
of priority without the need for any further action on the part of the
appropriate Certificate Owner of the related Redemption Certificate, all in
accordance with the procedures of the Clearing Agency and the Trustee. Upon the
transfer of beneficial ownership of any Redemption Certificate, any distribution
request previously submitted with respect to such Certificate will be deemed to
have been withdrawn only upon the receipt by the Trustee of notification of such
withdrawal using a form required by the Clearing Agency.

     Distributions in reduction of the Certificate Principal Amounts of
Redemption Certificates will be applied, in the aggregate, to such Certificates
in an amount equal to the portion of the Available Distribution Amount
distributable to the Redemption Certificates pursuant to Section 5.02(a)(iv),
plus any amounts available for distribution from the applicable Rounding Account
pursuant to Section 5.06(e), provided that the aggregate distribution in
reduction of the Class Principal Amount of any Class of Redemption Certificates
on any Distribution Date is made in an integral multiple of $1,000.

     (b) A "Deceased Holder" is a Certificate Owner of a Redemption Certificate
who was living at the time such interest was acquired and whose authorized
personal representative, surviving tenant by the entirety, surviving joint
tenant or surviving tenant in common or other Person empowered to act on behalf
of such Certificate Owner upon his or her death, causes to be furnished to the
Trustee a certified copy of the death certificate of such Certificate Owner and
any additional evidence of death required by and satisfactory to the Trustee and
any tax waivers requested by the Trustee. Redemption Certificates beneficially
owned by tenants by the entirety, joint tenants or tenants in common will be
considered to be beneficially owned by a single owner. The death of a tenant by
the entirety, joint tenant or tenant in common will be deemed to be the death of
the Certificate Owner, and any Redemption Certificates so beneficially owned
will be eligible for priority with respect to distributions in reduction of the
Class Principal

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Amount of such Class of Redemption Certificates, subject to the limitations
stated above. Redemption Certificates beneficially owned by a trust will be
considered to be beneficially owned by each beneficiary of the trust to the
extent of such beneficiary's beneficial interest therein, but in no event will a
trust's beneficiaries collectively be deemed to be Certificate Owners of a
number of Individual Redemption Certificates greater than the number of
Individual Redemption Certificates of which such trust is the beneficial owner.
The death of a beneficiary of a trust will be deemed to be the death of a
Certificate Owner of the Redemption Certificates beneficially owned by the trust
to the extent of such beneficiary's beneficial interest in such trust. The death
of an individual who was a tenant by the entirety, joint tenant or tenant in
common in a tenancy that is the beneficiary of a trust will be deemed to be the
death of the beneficiary of the trust. The death of a person who, during his or
her lifetime, was entitled to substantially all of the beneficial ownership
interests in Redemption Certificates will be deemed to be the death of the
Certificate Owner of such Redemption Certificates regardless of the registration
of ownership of such Redemption Certificates, if such beneficial interest can be
established to the satisfaction of the Trustee. Such beneficial interest will be
deemed to exist in typical cases of street name or nominee ownership, ownership
by a trustee, ownership under the Uniform Gifts to Minors Act and community
property or other joint ownership arrangements between a husband and wife.
Beneficial interests shall include the power to sell, transfer or otherwise
dispose of a Redemption Certificate and the right to receive the proceeds
therefrom, as well as interest and distributions in reduction of the Certificate
Principal Amounts of the Redemption Certificates payable with respect thereto.
The Trustee shall not be under any duty to determine independently (a) the
occurrence of the death of any deceased Certificate Owner or (b) whether an
individual is the personal representative of a Deceased Holder, or the surviving
tenant by the entirety, or the surviving joint tenant, or the surviving tenant
in common, or is otherwise the Person empowered to act on behalf of such
Deceased Holder (a "Representative"). The Trustee shall be entitled to rely on a
certificate executed by the Representative indicating the nature of such
Representative's authority on behalf of the Deceased Holder. The Trustee may
rely entirely upon documentation delivered to it pursuant to this Section 5.06
in establishing the eligibility of any Certificate Owner to receive the priority
accorded Deceased Holders in this Section 5.06(b), and shall have no liability
if it makes such determination in accordance with such documentation.

     (c) Requests for distributions in reduction of the Certificate Principal
Amount of a Redemption Certificate must be made by delivering a written request
therefor to the Clearing Agency Participant or Financial Intermediary that
maintains the account evidencing the Certificate Owner's interest in such
Redemption Certificate. Such Clearing Agency Participant or Financial
Intermediary should in turn make the request of the Clearing Agency (or, in the
case of an Financial Intermediary, such Financial Intermediary should notify the
related Clearing Agency Participant of such request, which Clearing Agency
Participant should make the request of the Clearing Agency) on a form required
by the Clearing Agency and provided to the Clearing Agency Participant. Upon
receipt of such request, the Clearing Agency will date and time stamp such
request and forward such request to the Trustee. The Clearing Agency may
establish such procedures as it deems fair and equitable to establish the order
of receipt of requests for such distributions received by it on the same day.
The Trustee shall not be liable for any delay in delivery of requests for
distributions or withdrawals of such requests by the Clearing Agency, a Clearing
Agency Participant or any Financial Intermediary.

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         In the event that any requests for distributions in reduction of the
Certificate Principal Amount of Redemption Certificates are rejected by the
Trustee for failure to comply with the requirements of this Section 5.06, the
Trustee shall return such requests to the appropriate Clearing Agency
Participant with a copy to the Clearing Agency with an explanation as to the
reason for such rejection.

         The Trustee shall maintain a list of those Clearing Agency Participants
representing the Certificate Owners of Redemption Certificates that have
submitted requests for distributions in reduction of the Certificate Principal
Amount of such Redemption Certificates, together with the order of receipt and
the amounts of such requests. The Trustee shall notify the Clearing Agency and
the appropriate Clearing Agency Participants as to which requests should be
honored on each Distribution Date. Requests shall be honored by the Clearing
Agency in accordance with the procedures, and subject to the priorities and
limitations, described in this Section 5.06. The exact procedures to be followed
by the Trustee and the Clearing Agency for purposes of determining such
priorities and limitations shall be those established from time to time by the
Trustee or the Clearing Agency, as the case may be. The decisions of the Trustee
and the Clearing Agency concerning such matters shall be final and binding on
all affected Persons.

         Payments in reduction of the Certificate Principal Amounts of
Redemption Certificates shall be made on the applicable Distribution Date and
the Certificate Principal Amounts as to which such payments are made shall cease
to bear interest after the last day of the month preceding the month in which
such Distribution Date occurs.

         Any Certificate Owner of a Redemption Certificate that has requested a
distribution may withdraw its request by so notifying in writing the Clearing
Agency Participant or Financial Intermediary that maintains such Certificate
Owner's account. In the event that such account is maintained by a Financial
Intermediary, such Financial Intermediary should notify the related Clearing
Agency Participant which in turn should forward the withdrawal of such request,
on a form required by the Clearing Agency, to the Trustee. If such notice of
withdrawal of a request for distribution has not been received by the Clearing
Agency and forwarded to the Trustee on or before the Record Date for the next
Distribution Date, the previously made request for distribution will be
irrevocable with respect to the making of distributions in reduction of the
Certificate Principal Amount of such Redemption Certificate on such Distribution
Date.

     (d) To the extent, if any, that amounts available for distribution in
reduction of the Class Principal Amount of any Class of Redemption Certificates
on a Distribution Date exceed the dollar amount of requests for distributions
with respect to such Class that have been received by the related Record Date,
as provided in Section 5.06(c) above, distributions in reduction of the Class
Principal Amount of such Class of Redemption Certificates will be made by
mandatory distributions in reduction thereof. The Trustee shall notify the
Clearing Agency of the aggregate amount of the mandatory distribution in
reduction of the Class Principal Amount of such Class of Redemption Certificates
to be made on the next Distribution Date. The Clearing Agency shall then
allocate such aggregate amount among its Clearing Agency Participants on a
random lot basis. Each Clearing Agency Participant and, in turn, each Financial
Intermediary, will then select, in accordance with its own procedures,
Individual Redemption Certificates from among

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those held in its accounts to receive mandatory distributions in reduction of
the Class Principal Amount of such Class of Redemption Certificates, such that
the total amount so selected is equal to the aggregate amount of such mandatory
distributions allocated to such Clearing Agency Participant by the Clearing
Agency and to such Financial Intermediary by its related Clearing Agency
Participant, as the case may be. Clearing Agency Participants and Financial
Intermediaries that hold Redemption Certificates selected for mandatory
distributions in reduction of the Class Principal Amount thereof should provide
notice of such mandatory distributions to the affected Certificate Owners.

     (e) On the Closing Date, a Rounding Account shall be established with the
Trustee for each Class of Redemption Certificates, and Lehman Brothers Inc.
shall cause to be initially deposited the sum of $999.99 in each Rounding
Account. On each Distribution Date on which a distribution is made in reduction
of the Class Principal Amount of a Class of Redemption Certificates, funds on
deposit in the applicable Rounding Account shall be, to the extent needed,
withdrawn by the Trustee and applied to round upward to an integral multiple of
$1,000 the aggregate distribution in reduction of the Class Principal Amount to
be made on such Redemption Certificates. Rounding of such distribution on such
Redemption Certificates shall be accomplished, on the first such Distribution
Date, by withdrawing from the applicable Rounding Account the amount of funds,
if any, needed to round the amount otherwise available for such distribution in
reduction of the Class Principal Amount of such Class of Redemption Certificates
upward to the next integral multiple of $1,000. On each succeeding Distribution
Date on which distributions in reduction of the Class Principal Amount of such
Class of Redemption Certificates are to be made, the aggregate amount of such
distributions allocable to such Class of Redemption Certificates shall be
applied first to repay any funds withdrawn from the applicable Rounding Account
and not previously repaid, and then the remainder of such allocable amount, if
any, shall be similarly rounded upward and applied as distributions in reduction
of the Class Principal Amount of such Class of Redemption Certificates; this
process shall continue on succeeding Distribution Dates until the Class
Principal Amount of such Class of Redemption Certificates has been reduced to
zero. Each Rounding Account shall be an "outside reserve fund" under the REMIC
Provisions that is beneficially owned for all federal income tax purposes by
Lehman Brothers Inc. Lehman Brothers Inc. will report all income, gain,
deduction or loss with respect thereto. The Trustee, upon the written
instructions of the Depositor, may invest, or cause to be invested funds in and
Rounding Account in Eligible Investments (which may be obligations of the
Trustee). The Trustee shall distribute interest earnings, if any, on amounts
held in any Rounding Account as such interest is earned pursuant to written
instructions from Lehman Brothers Inc. to the Trustee. In no event shall the
Trustee be liable for investment losses resulting from investment of funds in
the Rounding Accounts made in accordance with the instructions of the Depositor.

     Notwithstanding anything herein to the contrary, on the Distribution Date
on which distributions in reduction of the Class Principal Amount of any Class
of Redemption Certificates will reduce the Class Principal Amount thereof to
zero or in the event that distributions in reduction of the Class Principal
Amount of such Class of Redemption Certificates are made in accordance with the
provisions set forth in Section 5.06(f), an amount equal to the difference
between $999.99 and the sum then held in the applicable Rounding Account shall
be paid from the Available Distribution Amount for such Distribution Date to
such Rounding Account. Any funds then on deposit in such Rounding Account shall
be distributed to Lehman Brothers Inc.

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     (f) Notwithstanding any provisions herein to the contrary, on each
Distribution Date following the first Distribution Date on or after the Credit
Support Depletion Date, all distributions in reduction of the Class Principal
Amount of any Class of Redemption Certificates will be made among the Holders of
such Class of Certificates, pro rata, based on their Certificate Principal
Amounts, and will not be made in integral multiples of $1,000 or pursuant to
requested distributions or mandatory distributions by random lot.

     (g) In the event that Definitive Certificates representing any Class of
Redemption Certificates are issued pursuant to Section 3.09(c), all requests for
distributions or withdrawals of such requests relating to such Class must be
submitted to the Trustee, and the Trustee shall perform the functions described
in Section 5.06(a) through (c) using its own procedures, which procedures shall,
to the extent practicable, be consistent with the procedures described in
Section 5.06(a) through (c).

     Section 5.07. The Class A4 Certificate Insurance Policy.

     (a) If, on the second Business Day before any Distribution Date, the
Trustee determines that an Insured Payment is required to be made by the
Certificate Insurer on such Distribution Date, the Trustee shall determine the
amount of any such Insured Payment and shall give written notice to the
Certificate Insurer by completing a Notice in the form of Exhibit A to the Class
A4 Certificate Insurance Policy and submitting such Notice by 12:00 noon, New
York City time on such second Business Day as a claim for an Insured Payment.
The Trustee's responsibility for delivering a Notice to the Certificate Insurer,
as provided in the preceding sentence, is limited to the availability,
timeliness and accuracy of the information provided by the Master Servicer.

     (b) In the event the Trustee receives a certified copy of an order of the
appropriate court that any scheduled payment of principal or interest on a Class
A4 Certificate has been voided in whole or in part as a preference payment under
applicable bankruptcy law, the Trustee shall promptly notify the Certificate
Insurer, and the Trustee shall comply with the provisions of the Class A4
Certificate Insurance Policy to obtain payment by the Certificate Insurer of
such voided scheduled payment. In addition, the Trustee (at the Depositor's
Expense) shall mail notice to all Holders of the Class A4 Certificates so
affected that, in the event that any such Holder's scheduled payment is so
recovered, such Holder will be entitled to payment pursuant to the terms of the
Class A4 Certificate Insurance Policy, a copy of which shall be made available
to such Holders by the Trustee. If requested in writing, the Trustee shall
furnish to the Certificate Insurer, its records listing the payments on the
affected Class A4 Certificates, if any, that have been made by the Trustee and
subsequently recovered from the affected Holders, and the dates on which such
payments were made by the Trustee.

     (c) At the time of the execution hereof, and for the purposes hereof, the
Trustee shall establish a separate special purpose trust account in the name of
the Trustee for the benefit of Holders of the Class A4 Certificates (the "Class
A4 Policy Payments Account") over which the Trustee shall have exclusive control
and sole right of withdrawal. The Class A4 Policy Payments Account shall be an
Eligible Account. The Trustee shall deposit any amount paid under the Class A4
Certificate Insurance Policy into the Class A4 Policy Payments Account and
distribute such amount only for the purposes of making payments to Holders of
the Class A4

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Certificates in respect of the Class A4 Guaranteed Distributions (or other
amounts payable pursuant to paragraph (b) above on the Class A4 Certificates by
the Certificate Insurer pursuant to the Class A4 Certificate Insurance Policy)
for which the related claim was made under the Class A4 Certificate Insurance
Policy. Such amounts shall be allocated by the Trustee to Holders of Class A4
Certificates entitled to such payments in the same manner as principal and
interest distributions are to be allocated with respect to such Certificates
pursuant to Section 5.02. It shall not be necessary for such payments to be made
by checks or wire transfers separate from the checks or wire transfers used to
make regular payments hereunder with funds withdrawn from the Certificate
Account. However, any payments made on the Class A4 Certificates from funds in
the Class A4 Policy Payments Account shall be noted as provided in subsection
(e) below. Funds held in the Class A4 Policy Payments Account shall not be
invested by the Trustee.

     (d) Any funds received from the Certificate Insurer for deposit into the
Class A4 Policy Payments Account pursuant to the Class A4 Certificate Insurance
Policy in respect of a Distribution Date or otherwise as a result of any claim
under such Class A4 Certificate Insurance Policy shall be applied by the Trustee
directly to the payment in full (i) of the Insured Payments due on such
Distribution Date on the Class A4 Certificates, or (ii) of other amounts to
which payments under the Class A4 Certificate Insurance Policy are to be
applied. Funds received by the Trustee as a result of any claim under the Class
A4 Certificate Insurance Policy shall be used solely for payment to the Holders
of the Class A4 Certificates and may not be applied for any other purpose,
including, without limitation, satisfaction of any costs, expenses or
liabilities of the Trustee or the Trust Fund. Any funds remaining in the Class
A4 Policy Payments Account on the first Business Day after each Distribution
Date shall be remitted promptly to the Certificate Insurer pursuant to the
written instruction of the Certificate Insurer.

     (e) The Trustee shall keep complete and accurate records in respect of (i)
all funds remitted to the Trustee by the Certificate Insurer and deposited into
the Class A4 Policy Payments Account and (ii) the allocation of such funds to
(A) payments of interest on and principal in respect of any Class A4
Certificates, (B) Realized Losses allocated to the Class A4 Certificates, (C)
Net Prepayment Interest Shortfalls and Relief Act Reductions allocated to the
Class A4 Certificates, and (D) payments in respect of Preference Amounts. The
Certificate Insurer shall have the right to inspect such records at reasonable
times during normal business hours upon three Business Days' prior notice to the
Trustee. Any Insured Payments disbursed by the Trustee from proceeds of the
Class A4 Certificate Insurance Policy shall be considered payment by the
Certificate Insurer and not by the Trust Fund with respect to the Class A4
Certificates and the Certificate Insurer will be entitled to receive the related
Reimbursement Amount pursuant to Section 5.02(a)(vii).

     (f) The Trustee acknowledges, and each Holder of a Class A4 Certificate by
its acceptance of such Class A4 Certificate agrees, that, without the need for
any further action on the part of the Certificate Insurer or the Trustee, to the
extent the Certificate Insurer makes Insured Payments, directly or indirectly,
on account of principal of or interest on any Class A4 Certificates, the
Certificate Insurer will be fully subrogated to the rights of the Holders of
such Class A4 Certificates to receive the related Reimbursement Amount pursuant
to Section 5.02(a)(vii). The Class A4 Certificateholders, by acceptance of the
Class A4 Certificates, assign their rights as Holders of the Class A4
Certificates to the extent of the Certificate Insurer's

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interest with respect to amounts paid under the Class A4 Certificate Insurance
Policy. Each of the Depositor and Trustee agrees to such subrogation and,
further agrees to execute such instruments and to take such actions as, in the
sole judgment of the Certificate Insurer are necessary to evidence such
subrogation and, subject to the priority of payment provisions of this
Agreement, to perfect the rights of the Certificate Insurer to receive any
moneys paid or payable in respect of the Class A4 Certificates under this
Agreement or otherwise. Anything herein to the contrary notwithstanding, solely
for purposes of determining the Certificate Insurer's rights as subrogee for
payments distributable pursuant to Section 5.02, any payment with respect to
distributions to the Class A4 Certificates that is made with funds received
pursuant to the terms of the Class A4 Certificate Insurance Policy shall not be
considered payment of the Class A4 Certificates from the Trust Fund and shall
not result in the distribution or the provision for the distribution in
reduction of the Class Principal Amount of the Class A4 Certificates or Accrued
Certificate Interest thereon, within the meaning of Article V.

     (g) Upon actual knowledge of the occurrence of an Event of Default, the
Trustee shall promptly notify the Certificate Insurer of such Event of Default.

     (h) The Trustee shall promptly notify the Certificate Insurer of either of
the following as to which a Responsible Officer of the Trustee has actual
knowledge: (A) the commencement of any proceeding by or against the Depositor
commenced under the United States bankruptcy code or any other applicable
bankruptcy, insolvency, receivership, rehabilitation or similar law (an
"Insolvency Proceeding") and (B) the making of any claim in connection with any
Insolvency Proceeding seeking the avoidance as a preferential transfer (a
"Preference Claim") of any distribution made with respect to the Class A4
Certificates. Each Holder of a Class A4 Certificate, by its purchase of Class A4
Certificates, and the Trustee hereby agree that the Certificate Insurer (so long
as no Certificate Insurer Default exists) may at any time during the
continuation of any proceeding relating to a Preference Claim direct all matters
relating to such Preference Claim, including, without limitation, (i) the
direction of any appeal of any order relating to any Preference Claim and (ii)
the posting of any surety, supersedeas or performance bond pending any such
appeal. In addition and without limitation of the foregoing, the Certificate
Insurer shall be subrogated to the rights of the Trustee and each Holder of a
Class A4 Certificate in the conduct of any Preference Claim, including, without
limitation, all rights of any party to an adversary proceeding action with
respect to any court order issued in connection with any such Preference Claim.

     (i) The Trustee shall surrender the Class A4 Certificate Insurance Policy
to the Certificate Insurer for cancellation upon the termination of the Trust
Fund pursuant to Section 7.01 hereof.

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                                   ARTICLE VI

                             CONCERNING THE TRUSTEE;
                                EVENTS OF DEFAULT

     Section 6.01. Duties of Trustee.

     (a) The Trustee, except during the continuance of an Event of Default (of
which a Responsible Officer of the Trustee shall have actual knowledge)
undertakes to perform such duties and only such duties as are specifically set
forth in this Agreement. Any permissive right of the Trustee provided for in
this Agreement shall not be construed as a duty of the Trustee. If an Event of
Default (of which a Responsible Officer of the Trustee shall have actual
knowledge) has occurred and has not otherwise been cured or waived, 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 unless the Trustee is acting as Master Servicer, in which case it
shall use the same degree of care and skill as the Master Servicer hereunder.

     (b) The Trustee, upon receipt of all resolutions, certificates, statements,
opinions, reports, documents, orders or other instruments furnished to the
Trustee which 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; provided, however, that the Trustee shall
not be responsible for the accuracy or content of any such resolution,
certificate, statement, opinion, report, document, order or other instrument
furnished by the Master Servicer, to the Trustee pursuant to this Agreement, and
shall not be required to recalculate or verify any numerical information
furnished to the Trustee pursuant to this Agreement.

     (c) The Trustee shall not have any liability arising out of or in
connection with this Agreement, except for its negligence or willful misconduct.
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:

         (i) The Trustee shall not be personally liable with respect to any
     action taken, suffered or omitted to be taken by it in good faith in
     accordance with the consent or direction of Holders of Certificates as
     provided in Section 6.19 hereof;

         (ii) For all purposes under this Agreement, the Trustee shall not be
     deemed to have notice of any Event of Default (other than resulting from a
     failure by the Master Servicer (i) to remit funds (or to make Advances) or
     (ii) to furnish information to the Trustee when required to do so) unless a
     Responsible Officer of the Trustee has actual knowledge thereof or unless
     written notice of any event which is in fact such a default is received by
     the Trustee at the Corporate Trust Office, and such notice references the
     Holders of the Certificates and this Agreement;

         (iii) No provision of this Agreement shall require the Trustee to
     expend or risk its own funds or otherwise incur any financial liability in
     the performance of any of its duties hereunder, or in the exercise of any
     of its rights or powers, if it shall have reasonable grounds for believing
     that repayment of such funds or adequate indemnity

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     against such risk or liability is not reasonably assured to it, and none of
     the provisions contained in this Agreement shall in any event require the
     Trustee to perform, or be responsible for the manner of performance of, any
     of the obligations of the Master Servicer under this Agreement except
     during such time, if any, as the Trustee shall be the successor to, and be
     vested with the rights, duties, powers and privileges of, the Master
     Servicer in accordance with the terms of this Agreement.

     (d) The Trustee shall have no duty hereunder with respect to any complaint,
claim, demand, notice or other document it may receive or which may be alleged
to have been delivered to or served upon it by the parties as a consequence of
the assignment of any Mortgage Loan hereunder; provided, however, that the
Trustee shall use its best efforts to remit to the Master Servicer upon receipt
any such complaint, claim, demand, notice or other document (i) which is
delivered to the Corporate Trust Office of the Trustee, (ii) of which a
Responsible Officer has actual knowledge, and (iii) which contains information
sufficient to permit the Trustee to make a determination that the real property
to which such document relates is a Mortgaged Property.

     (e) The Trustee shall not personally liable with respect to any action
taken, suffered or omitted to be taken by it in good faith in accordance with
the direction of Certificateholders of any Class holding Certificates which
evidence, as to such Class, Percentage Interests aggregating not less than 25%
as 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.

     (f) Subject to Section 4.04, the Trustee shall not be held liable by reason
of any insufficiency in any account (including without limitation the Collection
Account) held by or on behalf of the Trustee resulting from any investment loss
on any Eligible Investment included therein (except to the extent that the
Trustee is the obligor and has defaulted thereon).

     (g) Except as otherwise provided herein, the Trustee shall have no duty (A)
to see to any recording, filing, or depositing of this Agreement or any
agreement referred to herein or any financing statement or continuation
statement evidencing a security interest, or to see to the maintenance of any
such recording or filing or depositing or to any re-recording, re-filing or
re-depositing of any thereof, (B) to see to any insurance, (C) to see to the
payment or discharge of any tax, assessment, or other governmental charge or any
lien or encumbrance of any kind owing with respect to, assessed or levied
against, any part of the Trust Fund other than from funds available in the
Collection Account or the Certificate Account, or (D) to confirm or verify the
contents of any reports or certificates of the Master Servicer delivered to the
Trustee pursuant to this Agreement believed by the Trustee to be genuine and to
have been signed or presented by the proper party or parties.

     (h) The Trustee shall not be liable in its individual capacity for an error
of judgment made in good faith by a Responsible Officer or other officers of the
Trustee unless it shall be proved that the Trustee was negligent in ascertaining
the pertinent facts.

     (i) Notwithstanding anything in this Agreement to the contrary, the Trustee
shall not be liable for special, indirect or consequential losses or damages of
any kind whatsoever (including,

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but not limited to, lost profits), even if the Trustee has been advised of the
likelihood of such loss or damage and regardless of the form of action.

     Section 6.02. Certain Matters Affecting the Trustee.

     Except as otherwise provided in Section 6.01:

         (i) The Trustee may request, and may rely and shall be protected in
     acting or refraining from acting upon any resolution, Officer's
     Certificate, certificate of auditors, Opinion of Counsel or any other
     certificate, statement, instrument, opinion, report, notice, request,
     consent, order, approval, 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;

         (ii) The Trustee may consult with counsel and any advice of its counsel
     or 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 advice or Opinion of
     Counsel;

         (iii) The Trustee shall not be personally liable for any action taken,
     suffered or omitted by it in good faith and reasonably believed by it to be
     authorized or within the discretion or rights or powers conferred upon it
     by this Agreement;

         (iv) Unless an Event of Default shall have occurred and be continuing,
     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 (provided the same appears regular on its face), unless
     requested in writing to do so by Holders of at least a majority in Class
     Principal Amount (or Class Notional Amount) of each Class of Certificates;
     provided, however, that, if the payment within a reasonable time to the
     Trustee of the costs, expenses or liabilities likely to be incurred by it
     in the making of such investigation is, in the opinion of the Trustee not
     reasonably assured to the Trustee by the security afforded to it by the
     terms of this Agreement, the Trustee may require reasonable indemnity
     against such expense or liability or payment of such estimated expenses as
     a condition to proceeding. The reasonable expense thereof shall be paid by
     the Holders requesting such investigation;

         (v) The Trustee may execute any of the trusts or powers hereunder or
     perform any duties hereunder either directly or by or through agents,
     custodians, or attorneys, which agents, custodians or attorneys shall have
     any and all of the rights, powers, duties and obligations of the Trustee
     conferred on them by such appointment provided that the Trustee shall
     continue to be responsible for its duties and obligations hereunder to the
     extent provided herein, and provided further that the Trustee shall not be
     responsible for any misconduct or negligence on the part of any such agent
     or attorney appointed with due care by the Trustee;

         (vi) The Trustee shall be under no obligation to exercise any of the
     trusts or powers vested in it by this Agreement or to institute, conduct or
     defend any litigation hereunder or in relation hereto, in each case at the
     request, order or direction of any of the

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     Certificateholders pursuant to the provisions of this Agreement, unless
     such Certificateholders shall have offered to the Trustee reasonable
     security or indemnity against the costs, expenses and liabilities which may
     be incurred therein or thereby;

         (vii) The right of the Trustee to perform any discretionary act
     enumerated in this Agreement shall not be construed as a duty, and the
     Trustee shall not be answerable for other than its negligence or willful
     misconduct in the performance of such act; and

         (viii) The Trustee shall not be required to give any bond or surety in
     respect of the execution of the Trust Fund created hereby or the powers
     granted hereunder.

     Section 6.03. Trustee Not Liable for Certificates.

     The Trustee makes no representations as to the validity or sufficiency of
this Agreement, the Class A4 Certificate Insurance Policy or of the Certificates
(other than the certificate of authentication on the Certificates) or of any
Mortgage Loan, or related document save that the Trustee represents that,
assuming due execution and delivery by the other parties hereto, this Agreement
has been duly authorized, executed and delivered by it and constitutes its valid
and binding obligation, enforceable against it in accordance with its terms
except that such enforceability may be subject to (A) applicable bankruptcy and
insolvency laws and other similar laws affecting the enforcement of the rights
of creditors generally, and (B) general principles of equity regardless of
whether such enforcement is considered in a proceeding in equity or at law. The
Trustee shall not be accountable for the use or application by the Depositor of
funds paid to the Depositor in consideration of the assignment of the Mortgage
Loans to the Trust Fund by the Depositor or for the use or application of any
funds deposited into the Collection Account, the Certificate Account, any Escrow
Account or any other fund or account maintained with respect to the
Certificates. The Trustee shall not be responsible for the legality or validity
of this Agreement or the validity, priority, perfection or sufficiency of the
security for the Certificates issued or intended to be issued hereunder. The
Trustee shall have no responsibility for filing 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 or to
record this Agreement.

     Section 6.04. Trustee May Own Certificates.

     The Trustee and any Affiliate or agent of the Trustee in its individual or
any other capacity may become the owner or pledgee of Certificates and may
transact banking and trust with the other parties hereto with the same rights it
would have if it were not Trustee or such agent.

     Section 6.05. Eligibility Requirements for Trustee.

     The Trustee hereunder shall at all times be (i) an institution insured by
the FDIC and (ii) a corporation or national banking association, organized and
doing business under the laws of any State or the United States of America,
authorized under such laws to exercise corporate trust powers, having a combined
capital and surplus of not less than $50,000,000 and subject to supervision or
examination by federal or state authority. If such corporation or national
banking association publishes reports of condition at least annually, pursuant
to law or to the

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<PAGE>

requirements of the aforesaid supervising or examining authority, then, for the
purposes of this Section, the combined capital and surplus of such corporation
or national banking 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 either the Trustee shall cease to be eligible in accordance
with provisions of this Section, the Trustee shall resign immediately in the
manner and with the effect specified in Section 6.06.

     Section 6.06. Resignation and Removal of Trustee.

     (a) The Trustee may at any time resign and be discharged from the trust
hereby created by giving written notice thereof to the Depositor and the Master
Servicer. Upon receiving such notice of resignation, the Depositor will promptly
appoint a successor trustee by written instrument, one copy of which instrument
shall be delivered to the resigning Trustee one copy to the successor trustee
and one copy to the Master Servicer and one copy to the Certificate Insurer. If
no successor trustee shall have been so appointed and shall have accepted
appointment within 30 days after the giving of such notice of resignation, the
resigning Trustee may petition any court of competent jurisdiction for the
appointment of a successor trustee.

     (b) If at any time (i) the Trustee shall cease to be eligible in accordance
with the provisions of Section 6.05 and shall fail to resign after written
request therefor by the Depositor, (ii) the Trustee shall become incapable of
acting, or shall be adjudged a bankrupt or insolvent, or a receiver of the
Trustee of its property shall be appointed, or any public officer shall take
charge or control of the Trustee of its property or affairs for the purpose of
rehabilitation, conservation or liquidation, (iii) a tax is imposed or
threatened with respect to the Trust Fund by any state in which the Trustee or
the Trust Fund held by the Trustee is located, or (iv) the continued use of the
Trustee would result in a downgrading of the rating by the Rating Agencies of
any Class of Certificates with a rating (in the case of the Class A4
Certificates, determined without regard to the Class A4 Certificate Insurance
Policy), then the Depositor shall remove the Trustee and appoint a successor
trustee by written instrument, one copy of which instrument shall be delivered
to the Trustee so removed, one copy to the successor trustee, one copy to the
Certificate Insurer and one copy to the Master Servicer.

     (c) The Holders of more than 50% of the Class Principal Amount (or Class
Notional Amount) of each Class of Certificates may at any time upon 30 days'
written notice to the Trustee, the Depositor and the Certificate Insurer remove
the Trustee by such written instrument, signed by such Holders or their
attorney-in-fact duly authorized, one copy of which instrument shall be
delivered to the Depositor, one copy to the Trustee so removed, one copy to the
Certificate Insurer and one copy to the Master Servicer; the Depositor shall
thereupon use its best efforts to appoint a mutually acceptable successor
trustee in accordance with this Section.

     (d) Any resignation or removal of the Trustee and appointment of a
successor trustee pursuant to any of the provisions of this Section shall become
effective upon acceptance of appointment by the successor trustee as provided in
Section 6.07.

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     Section 6.07. Successor Trustee.

     (a) Any successor trustee appointed as provided in Section 6.06 shall
execute, acknowledge and deliver to the Depositor, the Master Servicer and to
its predecessor trustee 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 like effect as if originally
named as trustee herein. The predecessor trustee shall deliver to the successor
trustee (or assign to the Trustee its interest under each Custodial Agreement,
to the extent permitted thereunder) all Mortgage Files and documents and
statements related to each Mortgage Files held by it hereunder, and shall duly
assign, transfer, deliver and pay over to the successor trustee the entire Trust
Fund, together with all necessary instruments of transfer and assignment or
other documents properly executed necessary to effect such transfer and such of
the record or copies thereof maintained by the predecessor trustee in the
administration hereof as may be requested by the successor trustee and shall
thereupon be discharged from all duties and responsibilities under this
Agreement. In addition, the Master Servicer and the predecessor trustee shall
execute and deliver such other instruments and do such other things as may
reasonably be required to more fully and certainly vest and confirm in the
successor trustee as applicable all such rights, powers, duties and obligations.

     (b) No successor trustee shall accept appointment as provided in this
Section unless at the time of such appointment such successor trustee shall be
eligible under the provisions of Section 6.05.

     (c) Upon acceptance of appointment by a successor trustee as provided in
this Section, the Master Servicer shall mail notice of the succession of such
trustee hereunder to the Certificate Insurer and to all Holders of Certificates
at their addresses as shown in the Certificate Register and to the Rating
Agencies. The expenses of such mailing shall be borne by the Master Servicer.

     Section 6.08. Merger or Consolidation of Trustee.

     Any Person into which the Trustee may be merged or with which it may be
consolidated, or any Person resulting from any merger, conversion or
consolidation to which the Trustee shall be a party, or any Persons succeeding
to the business of the Trustee shall be the successor to the Trustee 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 that such Person shall be eligible under the provisions of Section
6.05.

     Section 6.09. Appointment of Co-Trustee, Separate Trustee or Custodian.

     (a) Notwithstanding any other provisions hereof, at any time, the Trustee,
the Depositor or the Certificateholders evidencing more than 50% of the Class
Principal Amount (or Class Notional Amount) of each Class of Certificates shall
each have the power from time to time to appoint one or more Persons to act
either as co-trustees jointly with the Trustee, or as separate trustees, or as
custodians, for the purpose of holding title to, foreclosing or otherwise taking

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action with respect to any Mortgage Loan outside the state where the Trustee has
its principal place of business where such separate trustee or co-trustee is
necessary or advisable (or the Trustee has been advised by the Master Servicer
that such separate trustee or co-trustee is necessary or advisable) under the
laws of any state in which a property securing a Mortgage Loan is located or for
the purpose of otherwise conforming to any legal requirement, restriction or
condition in any state in which a property securing a Mortgage Loan is located
or in any state in which any portion of the Trust Fund is located. The separate
Trustees, co-trustees, or custodians so appointed shall be trustees or
custodians for the benefit of all the Certificateholders and shall have such
powers, rights and remedies as shall be specified in the instrument of
appointment; provided, however, that no such appointment shall, or shall be
deemed to, constitute the appointee an agent of the Trustee.

     (b) Every separate trustee, co-trustee, and custodian shall, to the extent
permitted by law, be appointed and act subject to the following provisions and
conditions:

         (i) all powers, duties, obligations and rights conferred upon the
     Trustee in respect of the receipt, custody and payment of moneys shall be
     exercised solely by the Trustee;

         (ii) all other rights, powers, duties and obligations conferred or
     imposed upon the Trustee shall be conferred or imposed upon and exercised
     or performed by the Trustee and such separate trustee, co-trustee, or
     custodian jointly, except to the extent that under any law of any
     jurisdiction in which any particular act or acts are to be performed 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 Trust Fund or any portion thereof in any such
     jurisdiction, shall be exercised and performed by such separate trustee,
     co-trustee, or custodian;

         (iii) no trustee or custodian hereunder shall be personally liable by
     reason of any act or omission of any other trustee or custodian hereunder;
     and

         (iv) the Trustee or the Certificateholders evidencing more than 50% of
     the Aggregate Voting Interests of the Certificates may at any time accept
     the resignation of or remove any separate trustee, co-trustee or custodian,
     so appointed by it or them, if such resignation or removal does not violate
     the other terms of this Agreement.

     (c) Any notice, request or other writing given to the Trustee shall be
deemed to have been given to each of the then separate trustees and co-trustees,
as effectively as if given to each of them. Every instrument appointing any
separate trustee, co-trustee or custodian shall refer to this Agreement and the
conditions of this Article VI. 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.

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     (d) Any separate trustee, co-trustee or custodian 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. The Trustee shall not
be responsible for any action or inaction of any separate trustee, co-trustee or
custodian. If any separate trustee, co-trustee or custodian 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.

     (e) No separate trustee, co-trustee or custodian hereunder shall be
required to meet the terms of eligibility as a successor trustee under Section
6.05 hereunder and no notice to Certificateholders of the appointment shall be
required under Section 6.07 hereof.

     (f) The Trustee agrees to instruct the co-trustees, if any, to the extent
necessary to fulfill the Trustee's obligations hereunder.

     (g) The Trustee shall pay the reasonable compensation of the co-trustees to
the extent, and in accordance with the standards, specified in Section 6.12
hereof (which compensation shall not reduce any compensation payable to the
Trustee under such Section).

     Section 6.10. Authenticating Agents.

     (a) The Trustee may appoint one or more Authenticating Agents which shall
be authorized to act on behalf of the Trustee in authenticating Certificates.
Wherever reference is made in this Agreement to the authentication of
Certificates by the Trustee or the Trustee's certificate of authentication, such
reference shall be deemed to include authentication on behalf of the Trustee by
an Authenticating Agent and a certificate of authentication executed on behalf
of the Trustee by an Authenticating Agent. Each Authenticating Agent must be a
corporation organized and doing business under the laws of the United States of
America or of any state, having a combined capital and surplus of at least
$15,000,000, authorized under such laws to do a trust business and subject to
supervision or examination by federal or state authorities.

     (b) Any Person into which any Authenticating Agent may be merged or
converted or with which it may be consolidated, or any Person resulting from any
merger, conversion or consolidation to which any Authenticating Agent shall be a
party, or any Person succeeding to the corporate agency business of any
Authenticating Agent, shall continue to be the Authenticating Agent without the
execution or filing of any paper or any further act on the part of the Trustee
or the Authenticating Agent.

     (c) Any Authenticating Agent may at any time resign by giving at least 30
days' advance written notice of resignation to the Trustee and the Depositor.
The Trustee may at any time terminate the agency of any Authenticating Agent by
giving written notice of termination to such Authenticating Agent and the
Depositor. Upon receiving a notice of resignation or upon such a termination, or
in case at any time any Authenticating Agent shall cease to be eligible in
accordance with the provisions of this Section 6.10, the Trustee may appoint a
successor Authenticating Agent, shall give written notice of such appointment to
the Depositor and shall mail notice of such appointment to all Holders of
Certificates. Any successor Authenticating

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Agent upon acceptance of its appointment hereunder shall become vested with all
the rights, powers, duties and responsibilities of its predecessor hereunder,
with like effect as if originally named as Authenticating Agent. No successor
Authenticating Agent shall be appointed unless eligible under the provisions of
this Section 6.10. No Authenticating Agent shall have responsibility or
liability for any action taken by it as such at the direction of the Trustee.
Any Authenticating Agent shall be entitled to reasonable compensation for its
services and, if paid by the Trustee, it shall be a reimbursable expense
pursuant to Section 6.12.

     Section 6.11. Indemnification of Trustee.

     The Trustee and its directors, officers, employees and agents shall be
entitled to indemnification from the Trust Fund for any loss, liability or
expense incurred without negligence or willful misconduct on their part (it
being understood that the negligence or willful misconduct of any Custodian
shall not constitute negligence or willful misconduct on the part of the Trustee
or its directors, officers, employees, or agents for such purpose), arising out
of, or in connection with, the acceptance or administration of the trusts
created hereunder or in connection with the performance of the Trustee's duties
hereunder or under the Mortgage Loan Sale Agreement or any Servicing Agreement
or Custodial Agreement, including any applicable fees and expenses payable
pursuant to Section 6.12 and the costs and expenses of defending themselves
against any claim in connection with the exercise or performance of any of their
powers or duties hereunder, provided that:

         (i) with respect to any such claim, the Trustee shall have given the
     Depositor, the Master Servicer and the Holders written notice thereof
     promptly after the Trustee shall have knowledge thereof; provided that
     failure to so notify shall not relieve the Trust Fund of the obligation to
     indemnify the Trustee;

         (ii) while maintaining control over its own defense, the Trustee shall
     cooperate and consult fully with the Depositor in preparing such defense;
     and

         (iii) notwithstanding anything to the contrary in this Section 6.11,
     the Trust Fund shall not be liable for settlement of any such claim by the
     Trustee entered into without the prior consent of the Depositor, which
     consent shall not be unreasonably withheld.

     The provisions of this Section 6.11 shall survive any termination of this
Agreement and the resignation or removal of the Trustee and shall be construed
to include, but not be limited to any loss, liability or expense under any
environmental law.

     Section 6.12. Compensation of the Trustee.

     The Trustee shall be entitled to (i) receive, and is authorized to pay to
itself the amount of income or gain earned from the investment of funds in the
Certificate Account and (ii) reimbursement of all reasonable expenses,
disbursements and advancements incurred or made by the Trustee in accordance
with this Agreement (including fees and expenses of its counsel and all persons
not regularly in its employment), except any such expenses arising from its
negligence, bad faith or willful misconduct. The Custodian shall be compensated
as separately agreed with the Master Servicers and the Depositor

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     Section 6.13. Collection of Monies.

     Except as otherwise expressly provided in this Agreement, the Trustee may
demand payment or delivery of, and shall receive and collect, all money and
other property payable to or receivable by the Trustee pursuant to this
Agreement. The Trustee shall hold all such money and property received by it as
part of the Trust Fund and shall distribute it as provided in this Agreement. If
the Trustee shall not have timely received amounts to be remitted with respect
to the Mortgage Loans from the Master Servicer, the Trustee shall request the
Master Servicer to make such distribution as promptly as practicable or legally
permitted. If the Trustee shall subsequently receive any such amount, it may
withdraw such request.

     Section 6.14. Events of Default; Trustee To Act; Appointment of Successor.

     (a) The occurrence of any one or more of the following events shall
constitute an "Event of Default":

         (i) Any failure by the Master Servicer to furnish the Trustee the
     Mortgage Loan data sufficient to prepare the reports described in Section
     4.03(a) which continues unremedied for a period of one Business Day after
     the date upon which written notice of such failure shall have been given to
     such Master Servicer by the Trustee or to such Master Servicer and the
     Trustee by the Holders of not less than 25% of the Class Principal Amount
     (or Class Notional Amount) of each Class of Certificates affected thereby;
     or

         (ii) Any failure on the part of the Master Servicer duly to observe or
     perform in any material respect any other of the covenants or agreements on
     the part of such Master Servicer contained in this Agreement which
     continues unremedied for a period of 30 days (or 15 days, in the case of a
     failure to maintain any Insurance Policy required to be maintained pursuant
     to this Agreement) after the date on which written notice of such failure,
     requiring the same to be remedied, shall have been given to such Master
     Servicer by the Trustee, or to such Master Servicer and the Trustee by the
     Holders of not less than 25% of the Class Principal Amount (or Class
     Notional Amount) of each Class of Certificates affected thereby; or

         (iii) A decree or order of a court or agency or supervisory authority
     having jurisdiction for the appointment of a conservator or receiver 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 Master
     Servicer, and such decree or order shall have remained in force
     undischarged or unstayed for a period of 60 days or any Rating Agency
     reduces or withdraws or threatens to reduce or withdraw the rating of the
     Certificates because of the financial condition or loan servicing
     capability of such Master Servicer; or

         (iv) The Master Servicer shall consent to the appointment of a
     conservator or receiver or liquidator in any insolvency, readjustment of
     debt, marshalling of assets and liabilities, voluntary liquidation or
     similar proceedings of or relating to such Master Servicer or of or
     relating to all or substantially all of its property; or

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         (v) The Master Servicer shall admit in writing its inability to pay its
     debts generally as they become due, file a petition to take advantage of
     any applicable insolvency or reorganization statute, make an assignment for
     the benefit of its creditors or voluntarily suspend payment of its
     obligations; or

         (vi) The Master Servicer shall be dissolved, or shall dispose of all or
     substantially all of its assets, or consolidate with or merge into another
     entity or shall permit another entity to consolidate or merge into it, such
     that the resulting entity does not meet the criteria for a successor
     servicer as specified in Section 9.27 hereof; or

         (vii) If a representation or warranty set forth in Section 9.14 hereof
     shall prove to be incorrect as of the time made in any respect that
     materially and adversely affects the interests of the Certificateholders,
     and the circumstance or condition in respect of which such representation
     or warranty was incorrect shall not have been eliminated or cured within 60
     days after the date on which written notice of such incorrect
     representation or warranty shall have been given to the Master Servicer by
     the Trustee, or to the Master Servicer and the Trustee by the Holders of
     not less than 25% of the Aggregate Certificate Principal Amount of each
     Class of Certificates; or

         (viii) A sale or pledge of the any of the rights of the Master Servicer
     hereunder or an assignment of this Agreement by the Master Servicer or a
     delegation of the rights or duties of the Master Servicer hereunder shall
     have occurred in any manner not otherwise permitted hereunder and without
     the prior written consent of the Trustee and Certificateholders holding
     more than 50% of the Class Principal Amount (or Class Notional Amount) of
     each Class of Certificates;

         (ix) Any Servicer at any time is not either an FNMA- or FHLMC- approved
     Seller/Servicer, and the Master Servicer has not terminated the rights and
     obligations of such Servicer under the applicable Servicing Agreement and
     replaced such Servicer with an FNMA- or FHLMC-approved servicer within 30
     days of the absence of such approval; or

         (x) Any failure of the Master Servicer to remit to the Trustee any
     payment required to be made to the Trustee for the benefit of
     Certificateholders under the terms of this Agreement, including any
     Advance, on any Deposit Date.

     If an Event of Default described in clauses (i) through (ix) of this
Section 6.14 shall occur, then, in each and every case, subject to applicable
law, so long as any such Event of Default shall not have been remedied within
any period of time prescribed by this Section 6.14, the Trustee, by notice in
writing to the Master Servicer may, and shall, if so directed by
Certificateholders evidencing more than 50% of the Class Principal Amount (or
Class Notional Amount) of each Class of Certificates, terminate all of the
rights and obligations of the Master Servicer hereunder and in and to the
Mortgage Loans and the proceeds thereof. If an Event of Default described in
clause (x) of this Section 6.14 shall occur, then, in each and every case,
subject to applicable law, the Trustee, by notice in writing to the Master
Servicer, shall promptly terminate all of the rights and obligations of the
Master Servicer hereunder and in and to the Mortgage Loans and the proceeds
thereof. On or after the receipt by the Master Servicer of such

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written notice, all authority and power of the Master Servicer, and only in its
capacity as Master Servicer under this Agreement, whether with respect to the
Mortgage Loans or otherwise, shall pass to and be vested in the Trustee pursuant
to and under the terms of this Agreement; and the Trustee is hereby authorized
and empowered to execute and deliver, on behalf of the defaulting Master
Servicer as attorney-in-fact or otherwise, any and all 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. The defaulting Master Servicer agrees to
cooperate with the Trustee in effecting the termination of the defaulting Master
Servicer's responsibilities and rights hereunder as Master Servicer including,
without limitation, notifying Servicers of the assignment of the master
servicing function and providing the Trustee or its designee all documents and
records in electronic or other form reasonably requested by it to enable the
Trustee or its designee to assume the defaulting Master Servicer's functions
hereunder and the transfer to the Trustee for administration by it of all
amounts which shall at the time be or should have been deposited by the
defaulting Master Servicer in the Collection Account maintained by such
defaulting Master Servicer and any other account or fund maintained with respect
to the Certificates or thereafter received with respect to the Mortgage Loans.
The Master Servicer being terminated shall bear all costs of a master servicing
transfer, including but not limited to those of the Trustee reasonably allocable
to specific employees and overhead, legal fees and expenses, accounting and
financial consulting fees and expenses, and costs of amending the Agreement, if
necessary.

     Notwithstanding the termination of its activities as Master Servicer, each
terminated Master Servicer shall continue to be entitled to reimbursement to the
extent provided in Section 4.02(i), (ii), (iii), (iv), (v), (vi), (vii), (ix)
and (xi) to the extent such reimbursement relates to the period prior to such
Master Servicer's termination.

     If any Event of Default shall occur of which a Responsible Officer of the
Trustee has actual knowledge, the Trustee shall promptly notify the Certificate
Insurer and the Rating Agencies of the nature and extent of such Event of
Default. The Trustee shall immediately give written notice to the Master
Servicer upon such Master Servicer's failure to remit funds on the Deposit Date.

     Within 90 days of the time the Master Servicer receives a notice of
termination from the Trustee pursuant to Section 6.14(a) or the Trustee receives
the resignation of the Master Servicer evidenced by an Opinion of Counsel
pursuant to Section 9.28, the Trustee, unless another master servicer shall have
been appointed, shall be the successor in all respects to the Master Servicer in
its capacity as such under this Agreement and the transactions set forth or
provided for herein and shall have all the rights and powers and be subject to
all the responsibilities, duties and liabilities relating thereto and arising
thereafter placed on the Master Servicer hereunder, including the obligation to
make Advances; provided, however, that any failure to perform such duties or
responsibilities caused by the Master Servicer's failure to provide information
required by this Agreement shall not be considered a default by the Trustee
hereunder. Notwithstanding the foregoing, the parties hereto agree that the
Trustee, in its capacity as successor Master Servicer, immediately will assume
all of the obligations of the Master Servicer to make Advances. In addition, the
Trustee shall have no responsibility for any act or omission of the Master
Servicer prior to the issuance of any notice of termination and shall have no
liability

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relating to the representations and warranties of the Master Servicer set forth
in Section 9.14. In the Trustee's capacity as such successor, the Trustee shall
have the same limitations on liability herein granted to the Master Servicer. As
compensation therefor, the Trustee shall be entitled to receive all compensation
payable to the Master Servicer under this Agreement, including the Master
Servicing Fee. The Trustee shall be entitled to be reimbursed from the Master
Servicer (or by the Trust Fund if the Master Servicer is unable to fulfill its
obligations hereunder) for all costs associated with the transfer of master
servicing from the predecessor master servicer, including, without limitation,
any costs or expenses associated with the complete transfer of all master
servicing data and the completion, correction or manipulation of such master
servicing data as may be required by the Trustee to correct any errors or
insufficiencies in the master servicing data or otherwise to enable the Trustee
to master service the Mortgage Loans properly and effectively.

     (b) Notwithstanding the above, the Trustee may, if it shall be unwilling to
continue to so act, or shall, if it is unable to so act, appoint, petition a
court of competent jurisdiction to appoint, any established housing and home
finance institution servicer, master servicer, servicing or mortgage servicing
institution having a net worth of not less than $15,000,000 and meeting such
other standards for a successor master servicer as are set forth in this
Agreement, as the successor to such Master Servicer in the assumption of all of
the responsibilities, duties or liabilities of a master servicer, like the
Master Servicer. Any entity designated by the Trustee as a successor master
servicer may be an Affiliate of the Trustee; provided, however, that, unless
such Affiliate meets the net worth requirements and other standards set forth
herein for a successor master servicer, the Trustee, in its individual capacity
shall agree, at the time of such designation, to be and remain liable to the
Trust Fund for such Affiliate's actions and omissions in performing its duties
hereunder. 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 no
such compensation shall be in excess of that permitted to the Master Servicer
hereunder. The Trustee and such successor shall take such actions, consistent
with this Agreement, as shall be necessary to effectuate any such succession and
may make other arrangements with respect to the servicing to be conducted
hereunder which are not inconsistent herewith. The Master Servicer shall
cooperate with the Trustee and any successor master servicer in effecting the
termination of the Master Servicer's responsibilities and rights hereunder
including, without limitation, notifying Mortgagors of the assignment of the
master servicing functions and providing the Trustee and successor master
servicer, as applicable, all documents and records in electronic or other form
reasonably requested by it to enable it to assume the Master Servicer's
functions hereunder and the transfer to the Trustee or such successor master
servicer, as applicable, all amounts which shall at the time be or should have
been deposited by the Master Servicer in the Collection Account and any other
account or fund maintained with respect to the Certificates or thereafter be
received with respect to the Mortgage Loans. Neither the Trustee nor any other
successor master servicer shall be deemed to be in default hereunder by reason
of any failure to make, or any delay in making, any distribution hereunder or
any portion thereof caused by (i) the failure of the Master Servicer to deliver,
or any delay in delivering, cash, documents or records to it, (ii) the failure
of the Master Servicer to cooperate as required by this Agreement, (iii) the
failure of the Master Servicer to deliver the Mortgage Loan data to the Trustee
as required by this Agreement or (iv) restrictions imposed by any regulatory
authority having jurisdiction over the Master Servicer.

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     Section 6.15. Additional Remedies of Trustee Upon Event of Default.

     During the continuance of any Event of Default, so long as such Event of
Default shall not have been remedied, the Trustee, in addition to the rights
specified in Section 6.14, shall have the right, in its own name and as trustee
of an express trust, to take all actions now or hereafter existing at law, in
equity or by statute to enforce its rights and remedies and to protect the
interests, and enforce the rights and remedies, of the Certificateholders and
the Certificate Insurer (including the institution and prosecution of all
judicial, administrative and other proceedings and the filings of proofs of
claim and debt in connection therewith). Except as otherwise expressly provided
in this Agreement, no remedy provided for by this Agreement shall be exclusive
of any other remedy, and each and every remedy shall be cumulative and in
addition to any other remedy, and no delay or omission to exercise any right or
remedy shall impair any such right or remedy or shall be deemed to be a waiver
of any Event of Default.

     Section 6.16. Waiver of Defaults.

     35% or more of the Aggregate Voting Interests of Certificateholders may
waive any default or Event of Default by the Master Servicer in the performance
of its obligations hereunder, except that a default in the making of any
required deposit to the Certificate Account that would result in a failure of
the Trustee to make any required payment of principal of or interest on the
Certificates may only be waived with the consent of 100% of the affected
Certificateholders. Upon any such waiver of a past default, such default shall
cease to exist, and any Event of Default arising therefrom shall be deemed to
have been remedied for every purpose of this Agreement. No such waiver shall
extend to any subsequent or other default or impair any right consequent thereon
except to the extent expressly so waived.

     Section 6.17. Notification to Holders.

     Upon termination of the Master Servicer or appointment of a successor to
the Master Servicer, in each case as provided herein, the Trustee shall promptly
mail notice thereof by first class mail to the Certificate Insurer and the
Certificateholders at their respective addresses appearing on the Certificate
Register. The Trustee shall also, within 45 days after the occurrence of any
Event of Default known to the Trustee, give written notice thereof to
Certificateholders, unless such Event of Default shall have been cured or waived
prior to the issuance of such notice and within such 45-day period.

     Section 6.18. Directions by Certificateholders and Duties of Trustee During
Event of Default.

     Subject to the provisions of Section 8.01 hereof, during the continuance of
any Event of Default, Holders of Certificates evidencing not less than 25% of
the Class Principal Amount (or Class Notional Amount) of each Class of
Certificates may direct 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; provided, however, that the
Trustee shall be under no obligation to pursue any such remedy, or to exercise
any of the trusts or powers vested in it by this Agreement (including, without
limitation, (i) the conducting or defending of any administrative action or
litigation hereunder or in relation hereto and (ii) the terminating of

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the Master Servicer or any successor master servicer from its rights and duties
as master servicer hereunder) at the request, order or direction of any of the
Certificateholders, unless such Certificateholders shall have offered to the
Trustee reasonable security or indemnity against the cost, expenses and
liabilities which may be incurred therein or thereby; and, provided further,
that, subject to the provisions of Section 8.01, the Trustee shall have the
right to decline to follow any such direction if the Trustee, in accordance with
an Opinion of Counsel, determines that the action or proceeding so directed may
not lawfully be taken or if the Trustee in good faith determines that the action
or proceeding so directed would involve it in personal liability or be unjustly
prejudicial to the non-assenting Certificateholders.

     Section 6.19. Action Upon Certain Failures of the Master Servicer and Upon
Event of Default.

     In the event that the Responsible Officer of the Trustee shall have actual
knowledge of any action or inaction of the Master Servicer that would become an
Event of Default upon the Master Servicer's failure to remedy the same after
notice, the Trustee shall give notice thereof to the Master Servicer. For all
purposes of this Agreement, in the absence of actual knowledge by a Responsible
Officer of the Trustee, the Trustee shall not be deemed to have knowledge of any
failure of the Master Servicer or any other Event of Default unless notified in
writing by the Depositor, the Master Servicer or a Certificateholder.

     Section 6.20. Preparation of Tax Returns and Other Reports.

     (a) The Trustee shall prepare or cause to be prepared on behalf of the
Trust Fund, based upon information calculated in accordance with this Agreement
pursuant to instructions given by the Depositor, and the Trustee shall file,
federal tax returns and appropriate state income tax returns and such other
returns as may be required by applicable law relating to the Trust Fund, and
shall file any other documents to the extent required by applicable state tax
law (to the extent such documents are in the Trustee's possession). The Trustee
shall forward copies to the Depositor of all such returns and Form 1099
supplemental tax information and such other information within the control of
the Trustee as the Depositor may reasonably request in writing, and shall
forward to each Certificateholder such forms and furnish such information within
the control of the Trustee as are required by the Code and the REMIC Provisions
to be furnished to them, and will prepare and disseminate to the Trustee for
distribution to Certificateholders Form 1099 (supplemental tax information) (or
otherwise furnish information within the control of the Trustee) to the extent
required by applicable law. The Master Servicer will indemnify the Trustee for
any liability of or assessment against the Trustee, as applicable, resulting
from any error in any of such tax or information returns directly resulting from
errors in the information provided by such Master Servicer.

     (b) The Trustee shall prepare and file with the Internal Revenue Service
("IRS"), on behalf of each of the Lower Tier REMIC and the Upper Tier REMIC, an
application on IRS Form SS-4. The Trustee, upon receipt from the IRS of the
Notice of Taxpayer Identification Number Assigned for each REMIC, shall promptly
forward copies of such notices to the Master Servicer, the Trustee and the
Depositor. The Trustee will file an IRS Form 8811.

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     (c) The Depositor shall prepare or cause to be prepared the initial current
report on Form 8-K. Thereafter, within 15 days after each Distribution Date, the
Trustee shall, in accordance with industry standards, file with the Securities
and Exchange Commission (the "Commission") via the Electronic Data Gathering and
Retrieval System (EDGAR), a Form 8-K with a copy of the statement to the
Certificateholders for such Distribution Date as an exhibit thereto. Prior to
January 30, 2002, the Trustee shall, in accordance with industry standards, file
a Form 15 Suspension Notification with respect to the Trust Fund, if applicable.
Prior to March 31, 2002, the Trustee shall file a Form 10-K, in substance
conforming to industry standards, with respect to the Trust Fund. The Depositor
hereby grants to the Trustee a limited power of attorney to execute and file
each such document on behalf of the Depositor. Such power of attorney shall
continue until either the earlier of (i) receipt by the Trustee from the
Depositor of written termination of such power of attorney and (ii) the
termination of the Trust Fund. The Depositor agrees to promptly furnish to the
Trustee, from time to time upon request, such further information, reports, and
financial statements within its control related to this Agreement and the
Mortgage Loans as the Trustee reasonably deems appropriate to prepare and file
all necessary reports with the Commission. The Trustee shall have no
responsibility to file any items other than those specified in this section.

                                  ARTICLE VII

                            PURCHASE AND TERMINATION
                                OF THE TRUST FUND

     Section 7.01. Termination of Trust Fund Upon Repurchase or Liquidation of
All Mortgage Loans.

     (a) The respective obligations and responsibilities of the Trustee and the
Master Servicer created hereby (other than the obligation of the Trustee to make
payments to Certificateholders as set forth in Section 7.02, the obligation of
the Master Servicer to make a final remittance to the Trustee for deposit into
the Certificate Account pursuant to Section 4.01 and the obligations of the
Master Servicer to the Trustee pursuant to Sections 9.10 and 9.14), shall
terminate on the earlier of (i) the final payment or other liquidation of the
last Mortgage Loan remaining in the Trust Fund and the disposition of all REO
Property and (ii) the sale of the property held by the Trust Fund in accordance
with Section 7.01(b); provided, however, that in no event shall the Trust Fund
created hereby continue beyond the expiration of 21 years from the death of the
last 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 hereof. Any
termination of the Trust Fund shall be carried out in such a manner so that the
termination of each REMIC included therein shall qualify as a "qualified
liquidation" under the REMIC Provisions.

     (b) On any Distribution Date occurring after the date on which the
aggregate Scheduled Principal Balance of the Mortgage Loans is less than 5% of
the Cut-off Date Aggregate Principal Balance, the Master Servicer may, upon
written direction to the Trustee cause (i) the Trustee to sell (or arrange for
the sale of) the assets of the Trust Fund and (ii) the Trust Fund to adopt a
plan of complete liquidation pursuant to Section 7.03(a)(i) hereof to sell all
of its property. The property of the Trust Fund shall be sold at a price (the
"Termination Price") equal to: (i) 100% of the unpaid principal balance of each
Mortgage Loan on the day of such purchase plus interest

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accrued thereon at the applicable Mortgage Rate with respect to any Mortgage
Loan and unpaid to the date of such repurchase, (ii) the fair market value of
any REO Property and any other property held by any REMIC, such fair market
value to be determined by an appraiser or appraisers appointed by the Master
Servicer with the consent of the Trustee, (iii) any unreimbursed Servicing
Advances with respect to each Mortgage Loan, and (iv) any Reimbursement Amounts
due to the Certificate Insurer.

     Section 7.02. Procedure Upon Termination of Trust Fund.

     (a) Notice of any termination pursuant to the provisions of Section 7.01,
specifying the Distribution Date upon which the final distribution shall be
made, shall be given promptly by the Trustee by first class mail to
Certificateholders mailed (x) no later than five Business Days after the Trustee
has received notice from the Master Servicer of its intent to exercise its right
to cause the termination of the Trust Fund pursuant to Section 7.01(b) or (y)
upon the final payment or other liquidation of the last Mortgage Loan or REO
Property in the Trust Fund. Such notice shall specify (A) the Distribution Date
upon which final distribution on the Certificates of all amounts required to be
distributed to Certificateholders pursuant to Section 5.02 will be made upon
presentation and surrender of the Certificates at the Corporate Trust Office,
and (B) that the Record Date otherwise applicable to such Distribution Date is
not applicable, distribution being made only upon presentation and surrender of
the Certificates at the office or agency of the Trustee therein specified. The
Trustee shall give such notice to the Master Servicer and the Certificate
Registrar at the time such notice is given to Holders of the Certificates. Upon
any such termination, the duties of the Certificate Registrar with respect to
the Certificates shall terminate and the Trustee shall terminate, or request the
Master Servicer to terminate, the Collection Account it maintains, the
Certificate Account and any other account or fund maintained with respect to the
Certificates, subject to the Trustee's obligation hereunder to hold all amounts
payable to Certificateholders in trust without interest pending such payment.

     (b) In the event that all of the Holders do not surrender their
Certificates for cancellation within three months after the time 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
one year after the second notice any Certificates shall not have been
surrendered for cancellation, the Trustee may take appropriate steps to contact
the remaining Certificateholders concerning surrender of such Certificates, and
the cost thereof shall be paid out of the amounts distributable to such Holders.
If within two years after the second notice any Certificates shall not have been
surrendered for cancellation, the Trustee shall, subject to applicable state law
relating to escheatment, hold all amounts distributable to such Holders for the
benefit of such Holders. No interest shall accrue on any amount held by the
Trustee and not distributed to a Certificateholder due to such
Certificateholder's failure to surrender its Certificate(s) for payment of the
final distribution thereon in accordance with this Section.

     (c) Any reasonable expenses incurred by the Trustee in connection with any
termination or liquidation of the Trust Fund shall be reimbursed from proceeds
received from the liquidation of the Trust Fund.

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     Section 7.03. Additional Trust Fund Termination Requirements.

     (a) Any termination of the Trust Fund shall be effected in accordance with
the following additional requirements, unless the Trustee seeks (at the request
of the Master Servicer), and subsequently receives, an Opinion of Counsel (at
the expense of the Master Servicer), addressed to the Trustee to the effect that
the failure of the Trust Fund to comply with the requirements of this Section
7.03 will not (i) result in the imposition of taxes on any REMIC under the REMIC
Provisions or (ii) cause any REMIC established hereunder to fail to qualify as a
REMIC at any time that any Certificates are outstanding:

         (i) The Trustee shall sell all of the assets of the Trust Fund for cash
     and, within 90 days of such sale, shall distribute the proceeds of such
     sale to the Certificateholders in complete liquidation of the Trust Fund,
     the Lower Tier REMIC and the Upper Tier REMIC; and

         (ii) The Trustee shall attach a statement to the final Federal income
     tax return for each of the Lower Tier REMIC and the Upper Tier REMIC
     stating that pursuant to Treasury Regulation (Section) 1.860F-1, the first
     day of the 90-day liquidation period for each such REMIC was the date on
     which the Trustee sold the assets of the Trust Fund.

     (b) By its acceptance of a Residual Certificate, each Holder thereof hereby
(i) authorizes the Trustee to take the action described in paragraph (a) above
and (ii) agrees to take such other action as may be necessary to facilitate
liquidation of each REMIC created under this Agreement, which authorization
shall be binding upon all successor Residual Certificateholders.

                                  ARTICLE VIII

                          RIGHTS OF CERTIFICATEHOLDERS

     Section 8.01. Limitation on Rights of Holders.

     (a) The death or incapacity of any Certificateholder shall not operate to
terminate this Agreement or this Trust Fund, nor entitle such
Certificateholder's legal representatives or heirs to claim an accounting or
take any action or proceeding in any court for a partition or winding up of this
Trust Fund, nor otherwise affect the rights, obligations and liabilities of the
parties hereto or any of them. Except as otherwise expressly provided herein, no
Certificateholder, solely by virtue of its status as a Certificateholder, shall
have any right to vote or in any manner otherwise control the Master Servicer or
the operation and management of the Trust Fund, or the obligations of the
parties hereto, 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 person by reason of any
action taken by the parties to this Agreement pursuant to any provision hereof.

     (b) No Certificateholder, solely by virtue of its status as
Certificateholder, shall have any right by virtue or by availing of any
provision 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

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the continuance thereof, as hereinbefore provided, and unless also the Holders
of Certificates evidencing not less than 25% of the Class Principal Amount (or
Class Notional Amount) of Certificates of each Class shall have made written
request upon 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 cost, expenses and liabilities to be
incurred therein or thereby, and the Trustee, for sixty 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 and no direction inconsistent
with such written request has been given such Trustee during such sixty-day
period by such Certificateholders; 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 of any
provision of this Agreement to affect, disturb or prejudice the rights of the
Holders of any other of such 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 benefit
of all Certificateholders. For the protection and enforcement of the provisions
of this Section, each and every Certificateholder and the Trustee shall be
entitled to such relief as can be given either at law or in equity.

     Section 8.02. Access to List of Holders.

     (a) If the Trustee is not acting as Certificate Registrar, the Certificate
Registrar will furnish or cause to be furnished to the Trustee, within fifteen
days after receipt by the Certificate Registrar of a request by the Trustee in
writing, a list, in such form as the Trustee may reasonably require, of the
names and addresses of the Certificateholders of each Class as of the most
recent Record Date.

     (b) If three or more Holders or Certificate Owners (hereinafter referred to
as "Applicants") apply in writing to the Trustee, and such application states
that the Applicants desire to communicate with other Holders with respect to
their rights under this Agreement or under the Certificates and is accompanied
by a copy of the communication which such Applicants propose to transmit, then
the Trustee shall, within five Business Days after the receipt of such
application, afford such Applicants reasonable access during the normal business
hours of the Trustee to the most recent list of Certificateholders held by the
Trustee or shall, as an alternative, send, at the Applicants' expense, the
written communication proffered by the Applicants to all Certificateholders at
their addresses as they appear in the Certificate Register.

     (c) Every Holder or Certificate Owner, if the Holder is a Clearing Agency,
by receiving and holding a Certificate, agrees with the Depositor, the Master
Servicer, the Certificate Registrar and the Trustee that neither the Depositor,
the Master Servicer, the Certificate Registrar nor the Trustee shall be held
accountable by reason of the disclosure of any such information as to the names
and addresses of the Certificateholders hereunder, regardless of the source from
which such information was derived.

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     Section 8.03. Acts of Holders of Certificates.

     (a) Any request, demand, authorization, direction, notice, consent, waiver
or other action provided by this Agreement to be given or taken by Holders or
Certificate Owner, if the Holder is a Clearing Agency, may be embodied in and
evidenced by one or more instruments of substantially similar tenor signed by
such Holders in person or by agent duly appointed in writing; and, except as
herein otherwise expressly provided, such action shall become effective when
such instrument or instruments are delivered to the Trustee and, where expressly
required herein, to the Master Servicer. Such instrument or instruments (as the
action embodies therein and evidenced thereby) are herein sometimes referred to
as an "Act" of the Holders signing such instrument or instruments. Proof of
execution of any such instrument or of a writing appointing any such agents
shall be sufficient for any purpose of this Agreement and conclusive in favor of
the Trustee and Master Servicer, if made in the manner provided in this Section.
Each of the Trustee and Master Servicer shall promptly notify the others of
receipt of any such instrument by it, and shall promptly forward a copy of such
instrument to the others.

     (b) The fact and date of the execution by any Person of any such instrument
or writing may be proved by the affidavit of a witness of such execution or by
the certificate of any notary public or other officer authorized by law to take
acknowledgments or deeds, certifying that the individual signing such instrument
or writing acknowledged to him the execution thereof. Whenever such execution is
by an officer of a corporation or a member of a partnership on behalf of such
corporation or partnership, such certificate or affidavit shall also constitute
sufficient proof of his authority. The fact and date of the execution of any
such instrument or writing, or the authority of the individual executing the
same, may also be proved in any other manner which the Trustee deems sufficient.

     (c) The ownership of Certificates (whether or not such Certificates shall
be overdue and notwithstanding any notation of ownership or other writing
thereon made by anyone other than the Trustee) shall be proved by the
Certificate Register, and neither the Trustee, the Master Servicer, nor the
Depositor shall be affected by any notice to the contrary.

     (d) Any request, demand, authorization, direction, notice, consent, waiver
or other action by the Holder of any Certificate shall bind every future Holder
of the same Certificate and the Holder of every Certificate issued upon the
registration of transfer thereof or in exchange therefor or in lieu thereof, in
respect of anything done, omitted or suffered to be done by the Trustee or the
Master Servicer in reliance thereon, whether or not notation of such action is
made upon such Certificate.

                                   ARTICLE IX

                 ADMINISTRATION AND SERVICING OF MORTGAGE LOANS
                             BY THE MASTER SERVICER

     Section 9.01. Duties of the Master Servicer.

     The Certificateholders, by their purchase and acceptance of the
Certificates, appoint Aurora Loan Services Inc., as Master Servicer. For and on
behalf of the Depositor, the Trustee

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and the Certificateholders, the Master Servicer shall master service the
Mortgage Loans in accordance with the provisions of this Agreement and the
provisions of the applicable Servicing Agreement.

     Section 9.02. Master Servicer Fidelity Bond and Master Servicer Errors and
Omissions Insurance Policy.

     (a) The Master Servicer, at its expense, shall maintain in effect a
Fidelity Bond and an Errors and Omissions Insurance Policy, affording coverage
with respect to all directors, officers, employees and other Persons acting on
such Master Servicer's behalf, and covering errors and omissions in the
performance of the Master Servicer's obligations hereunder. The Errors and
Omissions Insurance Policy and the Fidelity Bond shall be in such form and
amount that would meet the requirements of FNMA or FHLMC if it were the
purchaser of the Mortgage Loans. The Master Servicer shall (i) require each
Servicer to maintain an Errors and Omissions Insurance Policy and a Fidelity
Bond in accordance with the provisions of the applicable Servicing Agreement,
(ii) cause each Servicer to provide to the Master Servicer certificates
evidencing that such policy and bond is in effect and to furnish to the Master
Servicer any notice of cancellation, non-renewal or modification of the policy
or bond received by it, as and to the extent provided in the applicable
Servicing Agreement, and (iii) furnish copies of the certificates and notices
referred to in clause (ii) to the Trustee upon its request. The Fidelity Bond
and Errors and Omissions Insurance Policy may be obtained and maintained in
blanket form.

     (b) The Master Servicer shall promptly report to the Trustee any material
changes that may occur in the Master Servicer Fidelity Bond or the Master
Servicer Errors and Omissions Insurance Policy and shall furnish to the Trustee,
on request, certificates evidencing that such bond and insurance policy are in
full force and effect. The Master Servicer shall promptly report to the Trustee
all cases of embezzlement or fraud, if such events involve funds relating to the
Mortgage Loans. The total losses, regardless of whether claims are filed with
the applicable insurer or surety, shall be disclosed in such reports together
with the amount of such losses covered by insurance. If a bond or insurance
claim report is filed with any of such bonding companies or insurers, the Master
Servicer shall promptly furnish a copy of such report to the Trustee. Any
amounts relating to the Mortgage Loans collected by the Master Servicer under
any such bond or policy shall be promptly remitted by the Master Servicer to the
Trustee for deposit into the Certificate Account. Any amounts relating to the
Mortgage Loans collected by any Servicer under any such bond or policy shall be
remitted to the Master Servicer to the extent provided in the applicable
Servicing Agreement.

     Section 9.03. Master Servicer's Financial Statements and Related
Information.

     For each year this Agreement is in effect, the Master Servicer shall submit
to the Trustee, each Rating Agency and the Depositor a copy of its annual
unaudited financial statements on or prior to August 31 of each year. Such
financial statements shall include a balance sheet, income statement, statement
of retained earnings, statement of additional paid-in capital, statement of
changes in financial position and all related notes and schedules and shall be
in comparative form, certified by a nationally recognized firm of Independent
Accountants to the effect that such statements were examined and prepared in
accordance with generally accepted accounting principles applied on a basis
consistent with that of the preceding year.

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<PAGE>

     Section 9.04. Power to Act; Procedures.

     (a) The Master Servicer shall master service the Mortgage Loans and shall
have full power and authority, subject to the REMIC Provisions and the
provisions of Article X hereof, and each Servicer shall have full power and
authority (to the extent provided in the applicable Servicing Agreement) to do
any and all things that it may deem necessary or desirable in connection with
the servicing and administration of the Mortgage Loans, including but not
limited to the power and authority (i) to execute and deliver, on behalf of the
Certificateholders and the Trustee, customary consents or waivers and other
instruments and documents, (ii) to consent to transfers of any Mortgaged
Property and assumptions of the Mortgage Notes and related Mortgages, (iii) to
collect any Insurance Proceeds and Liquidation Proceeds, and (iv) to effectuate
foreclosure or other conversion of the ownership of the Mortgaged Property
securing any Mortgage Loan, in each case, in accordance with the provisions of
this Agreement and applicable Servicing Agreement, as applicable; provided that
the Master Servicer shall not take, or knowingly permit any Servicer to take,
any action that is inconsistent with or prejudices the interests of the Trust
Fund or the Certificateholders in any Mortgage Loan or the rights and interests
of the Depositor, the Trustee and the Certificateholders under this Agreement.
The Master Servicer further is authorized and empowered by the Trustee, on
behalf of the Certificateholders and the Trustee, in its own name or in the name
of any Servicer, when the Master Servicer or a Servicer, as the case may be,
believes it is appropriate in its best judgment to register any Mortgage Loan
with MERS, or cause the removal from the registration of any Mortgage Loan on
the MERS 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. The Master Servicer shall represent and protect the
interests of the Trust Fund in the same manner as it protects its own interests
in mortgage loans in its own portfolio in any claim, proceeding or litigation
regarding a Mortgage Loan and shall not make or knowingly permit any Servicer to
make any modification, waiver or amendment of any term of any Mortgage Loan that
would cause the Trust Fund 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 Master Servicer in its own
name or in the name of a Servicer, and each Servicer, to the extent such
authority is delegated to such Servicer by the Master Servicer under the
applicable Servicing Agreement, is hereby authorized and empowered by the
Trustee when the Master Servicer or applicable Servicer, as the case may be,
believes it appropriate in its best judgment and in accordance with Accepted
Servicing Practices and the applicable Servicing Agreement, to execute and
deliver, on behalf of itself and the Certificateholders, the Trustee or any of
them, any and all 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. The Trustee
shall execute, upon request, any powers of attorney furnished to it by the
Master Servicer empowering the Master Servicer or any Servicer to execute and
deliver instruments of satisfaction or cancellation, or of partial or full
release or discharge, and to foreclose upon or otherwise liquidate Mortgaged
Property, and to appeal, prosecute or defend in any court action relating to the
Mortgage Loans or the Mortgaged Property, in accordance with the applicable
Servicing Agreement and this Agreement, and the Trustee shall execute and
deliver such other documents, as the Master Servicer may request, necessary or
appropriate to enable the Master Servicer to master service and administer the
Mortgage Loans

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and carry out its duties hereunder, in each case in accordance with Accepted
Servicing Practices (and the Trustee shall have no liability for misuse of any
such powers of attorney by the Master Servicer or any Servicer). If the Master
Servicer or the Trustee has been advised that it is likely that the laws of the
state in which action is to be taken prohibit such action if taken in the name
of the Trustee or that the Trustee would be adversely affected under the "doing
business" or tax laws of such state if such action is taken in its name, then
upon request of the Trustee, the Master Servicer shall join with the Trustee in
the appointment of a co-trustee pursuant to Section 6.09 hereof. In the
performance of its duties hereunder, the Master Servicer shall be an independent
contractor and shall not, except in those instances where it is taking action in
the name of the Trustee, be deemed to be the agent of the Trustee.

     (b) In master servicing and administering the Mortgage Loans, the Master
Servicer shall employ procedures, and shall cause each Servicer to employ
procedures (including, but not limited to, collection procedures), consistent
with the applicable Servicing Agreement. Consistent with the foregoing, the
Master Servicer may, and may permit any Servicer to, in its discretion (i) waive
any late payment charge or any prepayment charge or penalty interest in
connection with the prepayment of a Mortgage Loan and (ii) extend the due dates
for payments due on a Mortgage Note for a period not greater than 120 days;
provided, however, that the maturity of any Mortgage Loan shall not be extended
past the date on which the final payment is due on the latest maturing Mortgage
Loan as of the Cut-off Date. In the event of any extension described in clause
(ii) above, the Master Servicer shall make or cause to be made Advances on the
related Mortgage Loan in accordance with the provisions of Section 5.04 on the
basis of the amortization schedule of such Mortgage Loan without modification
thereof by reason of such extension. Notwithstanding anything to the contrary in
this Agreement, the Master Servicer shall not, unless default by the related
Mortgagor is, in the reasonable judgment of the Master Servicer or the related
Servicer, imminent, make or knowingly permit such Servicer to make any
modification, waiver or amendment of any material term of any Mortgage Loan
(including but not limited to the interest rate, the principal balance, the
amortization schedule, or any other term affecting the amount or timing of
payments on the Mortgage Loan or the collateral therefor) unless the Master
Servicer or the related Servicer shall have provided or caused to be provided to
the Trustee an Opinion of Counsel (at the expense of the party seeking the
modification) in writing to the effect that such modification, waiver or
amendment would not be treated as giving rise to a new debt instrument for
federal income tax purposes and would not adversely affect the status of the
REMIC.

     Section 9.05. Servicing Agreements Between the Master Servicer and
Servicers; Enforcement of Servicers' Obligations.

     (a) Each Servicing Agreement requires the applicable Servicer to service
the Mortgage Loans in accordance with the provisions thereof. References in this
Agreement to actions taken or to be taken by the Master Servicer include such
actions taken or to be taken by a Servicer pursuant to a Servicing Agreement.
Any fees, costs and expenses and other amounts payable to such Servicers shall
be deducted from amounts remitted to the Master Servicer by the applicable
Servicer and shall not be an obligation of the Trust, the Trustee or the Master
Servicer.

     (b) The Master Servicer, for the benefit of the Trustee and the
Certificateholders, shall enforce the obligations of each Servicer under the
related Servicing Agreement, and shall use its

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reasonable best efforts to enforce the obligations of each Servicer under the
related Servicing Agreement and shall, upon its obtaining actual knowledge of
the failure of a Servicer to perform its obligations in accordance with the
related Servicing Agreement, to the extent that the non-performance of any such
obligations would have a material adverse effect on a Mortgage Loan, the Trust
Fund or Certificateholders (determined in the case of the Class A4 Certificates
without regard to the Class A4 Certificate Insurance Policy), terminate the
rights and obligations of such Servicer thereunder to the extent and in the
manner permitted by the related Servicing Agreement and either act as servicer
of the related Mortgage Loans or enter into a Servicing Agreement with a
successor Servicer. Such enforcement, including, without limitation, the legal
prosecution of claims, termination of Servicing Agreements and the pursuit of
other appropriate remedies, shall be in such form and carried out to such an
extent and at such time as the Master Servicer, in its good faith business
judgment, would require were it the owner of the related Mortgage Loans. The
Master Servicer shall pay the costs of such enforcement at its own expense, and
shall be reimbursed therefor initially only (i) from a general recovery
resulting from such enforcement only to the extent, if any, that such recovery
exceeds all amounts due in respect of the related Mortgage Loans or (ii) from a
specific recovery of costs, expenses or attorneys' fees against the party
against whom such enforcement is directed, and then, to the extent that such
amounts are insufficient to reimburse the Master Servicer for the costs of such
enforcement, (iii) from the Collection Account.

     Section 9.06. Collection of Taxes, Assessments and Similar Items.

     (a) To the extent provided in the applicable Servicing Agreement, the
Master Servicer shall cause each Servicer to establish and maintain one or more
custodial accounts at a depository institution (which may be a depository
institution with which the Master Servicer or any Servicer establishes accounts
in the ordinary course of its servicing activities), the accounts of which are
insured to the maximum extent permitted by the FDIC (each, an "Escrow Account")
and shall deposit therein any collections of amounts received with respect to
amounts due for taxes, assessments, water rates, Standard Hazard Insurance
Policy premiums or any comparable items for the account of the Mortgagors.
Withdrawals from any Escrow Account may be made (to the extent amounts have been
escrowed for such purpose) only in accordance with the applicable Servicing
Agreement. Each Servicer shall be entitled to all investment income not required
to be paid to Mortgagors on any Escrow Account maintained by such Servicer. The
Master Servicer shall make (or cause to be made) to the extent provided in the
applicable Servicing Agreement advances to the extent necessary in order to
effect timely payment of taxes, water rates, assessments, Standard Hazard
Insurance Policy premiums or comparable items in connection with the related
Mortgage Loan (to the extent that the Mortgagor is required, but fails, to pay
such items), provided that it has determined that the funds so advanced are
recoverable from escrow payments, reimbursement pursuant to Section 4.02(v) or
otherwise.

     (b) Costs incurred by the Master Servicer or by Servicers in effecting the
timely payment of taxes and assessments on the properties subject to the
Mortgage Loans may be added to the amount owing under the related Mortgage Note
where the terms of the Mortgage Note so permit; provided, however, that the
addition of any such cost shall not be taken into account for purposes of
calculating the distributions to be made to Certificateholders. Such costs, to
the extent that they are unanticipated, extraordinary costs, and not ordinary or
routine costs shall be recoverable by the Master Servicer pursuant to Section
4.02(v).

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     Section 9.07. Termination of Servicing Agreements; Successor Servicers.

     (a) The Master Servicer shall be entitled to terminate the rights and
obligations of any Servicer under the applicable Servicing Agreement in
accordance with the terms and conditions of such Servicing Agreement and without
any limitation by virtue of this Agreement; provided, however, that in the event
of termination of any Servicing Agreement by the Master Servicer or the related
Servicer, the Master Servicer shall either act as Servicer of the related
Mortgage Loans, or enter into a Servicing Agreement with a successor Servicer.

     (b) If the Master Servicer acts as Servicer, it will not assume liability
for the representations and warranties of the Servicer, if any, that it
replaces. The Master Servicer shall use reasonable efforts to have the successor
Servicer assume liability for the representations and warranties made by the
terminated Servicer in respect of the related Mortgage Loans, and in the event
of any such assumption by the successor Servicer, the Trustee or the Master
Servicer, as applicable, may, in the exercise of its business judgment, release
the terminated Servicer from liability for such representations and warranties.

     Section 9.08. Master Servicer Liable for Enforcement.

     Notwithstanding any Servicing Agreement, the Master Servicer shall remain
obligated and liable to the Trustee and the Certificateholders in accordance
with the provisions of this Agreement, to the extent of its obligations
hereunder, without diminution of such obligation or liability by virtue of such
Servicing Agreements or arrangements. The Master Servicer shall use commercially
reasonable efforts to ensure that the Mortgage Loans are serviced in accordance
with the provisions of this Agreement and shall use commercially reasonable
efforts to enforce the provisions of each Servicing Agreement for the benefit of
the Certificateholders. The Master Servicer shall be entitled to enter into any
agreement with the Servicers for indemnification of the Master Servicer and
nothing contained in this Agreement shall be deemed to limit or modify such
indemnification. Except as expressly set forth herein, the Master Servicer shall
have no liability for the acts or omissions of any Servicer in the performance
by such Servicer of its obligations under the related Servicing Agreement.

     Section 9.09. No Contractual Relationship Between Servicers and Trustee or
Depositor.

     Any Servicing Agreement that may be entered into and any other transactions
or services relating to the Mortgage Loans involving a Servicer in its capacity
as such and not as an originator shall be deemed to be between such Servicer,
the related Seller and the Master Servicer, and, except to the extent expressly
provided therein, the Trustee and the Depositor shall not be deemed parties
thereto and shall have no claims, rights, obligations, duties or liabilities
with respect to such Servicer except as set forth in Section 9.10 hereof.

     Section 9.10. Assumption of Servicing Agreement by Trustee.

     (a) In the event the Master Servicer shall for any reason no longer be the
Master Servicer (including by reason of any Event of Default under this
Agreement), the Trustee shall, in accordance with Section 6.14, thereupon assume
all of the rights and obligations of such Master Servicer hereunder and enforce
the rights under each Servicing Agreement entered into with respect to the
Mortgage Loans. The Trustee, its designee or any successor master servicer

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appointed by the Trustee shall be deemed to have assumed all of the Master
Servicer's interest herein and therein to the same extent as if such Servicing
Agreement had been assigned to the assuming party, except that the Master
Servicer shall not thereby be relieved of any liability or obligations of the
Master Servicer under such Servicing Agreement accruing prior to its replacement
as Master Servicer, and shall be liable to the Trustee, and hereby agrees to
indemnify and hold harmless the Trustee from and against all costs, damages,
expenses and liabilities (including reasonable attorneys' fees) incurred by the
Trustee as a result of such liability or obligations of the Master Servicer and
in connection with the Trustee's assumption (but not its performance, except to
the extent that costs or liability of the Trustee are created or increased as a
result of negligent or wrongful acts or omissions of the Master Servicer prior
to its replacement as Master Servicer) of the Master Servicer's obligations,
duties or responsibilities thereunder; provided that the Master Servicer shall
not indemnify or hold harmless the Trustee against negligent or willful
misconduct of the Trustee.

     (b) The Master Servicer that has been terminated shall, upon request of the
Trustee but at the expense of such Master Servicer, deliver to the assuming
party all documents and records relating to each Servicing Agreement and the
related Mortgage Loans and an accounting of amounts collected and held by it and
otherwise use its best efforts to effect the orderly and efficient transfer of
each Servicing Agreement to the assuming party.

     Section 9.11. "Due-on-Sale" Clauses; Assumption Agreements.

     (a) To the extent provided in the applicable Servicing Agreement, to the
extent Mortgage Loans contain enforceable due-on-sale clauses, and to the extent
that the Master Servicer has knowledge of the conveyance of a Mortgaged
Property, the Master Servicer shall use its reasonable best efforts to cause the
Servicers to enforce such clauses in accordance with the applicable Servicing
Agreement. If applicable law prohibits the enforcement of a due-on-sale clause
or such clause is otherwise not enforced in accordance with the applicable
Servicing Agreement, and, as a consequence, a Mortgage Loan is assumed, the
original Mortgagor may be released from liability in accordance with the
applicable Servicing Agreement.

     (b) The Master Servicer or the related Servicer, as the case may be, shall
be entitled to approve a request from a Mortgagor for the granting of an
easement thereon in favor of another Person or any alteration or demolition of
the related Mortgaged Property if it has determined, exercising its good faith
business judgment in the same manner as it would if it were the owner of the
related Mortgage Loan, that the security for, and the timely and full
collectability of, such Mortgage Loan would not be materially adversely affected
thereby. Any fee collected by the Master Servicer or the related Servicer for
processing such a request will be retained by the Master Servicer or such
Servicer as additional servicing compensation.

     Section 9.12. Release of Mortgage Files.

     (a) Upon (i) becoming aware of the payment in full of any Mortgage Loan or
(ii) the receipt by the Master Servicer of a notification that payment in full
has been or will be escrowed in a manner customary for such purposes, the Master
Servicer will, or will cause the applicable Servicer to, promptly notify the
Trustee (or the applicable Custodian) by a certification (which certification
shall include a statement to the effect that all amounts received or to be
received in

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connection with such payment that are required to be deposited in the Collection
Account maintained by the Master Servicer pursuant to Section 4.01 have been or
will be so deposited) of a Servicing Officer and shall request the Trustee or
the applicable Custodian, to deliver to the applicable Servicer the related
Mortgage File. In lieu of sending a hard copy certification of a Servicing
Officer, the Master Servicer may, or may cause the Servicer to, deliver the
request for release in a mutually agreeable electronic format. To the extent
that such a request, on its face, originates from a Servicing Officer, no
signature shall be required. Upon receipt of such certification and request, the
Trustee or the applicable Custodian, shall promptly release the related Mortgage
File to the applicable Servicer and neither the Trustee nor the Custodian shall
have any further responsibility with regard to such Mortgage File. The Master
Servicer is authorized, and each Servicer, to the extent such authority is
delegated to such Servicer by the Master Servicer under the applicable Servicing
Agreement, is authorized, to give, as agent for the Trustee, as the mortgagee
under the Mortgage that secured the Mortgage Loan, an instrument of satisfaction
(or assignment of mortgage without recourse) regarding the Mortgaged Property
subject to the Mortgage, which instrument of satisfaction or assignment, as the
case may be, shall be delivered to the Person or Persons entitled thereto
against receipt therefor of such payment, it being understood and agreed that no
expenses incurred in connection with such instrument of satisfaction or
assignment, as the case may be, shall be chargeable to the Collection Account.

     (b) From time to time and as appropriate for the servicing or foreclosure
of, or other legal proceedings relating to, any Mortgage Loan and in accordance
with Accepted Servicing Practices and the applicable Servicing Agreement, the
Trustee shall execute such pleadings, request for trustee's sale or other
documents as shall be prepared and furnished to the Trustee by the Master
Servicer, or by a Servicer (in form reasonably acceptable to the Trustee) and as
are necessary to the prosecution of any such proceedings. The Trustee or the
Custodian, shall, upon request of the Master Servicer, or of a Servicer, and
delivery to the Trustee or the applicable Custodian, of a trust receipt signed
by a Servicing Officer substantially in the form annexed hereto as Exhibit C or
in the form annexed to the applicable Custodial Agreement as Exhibit C, release
the related Mortgage File held in its possession or control to the Master
Servicer (or the applicable Servicer). Such trust receipt shall obligate the
Master Servicer or applicable Servicer to return the Mortgage File to the
Trustee or Custodian, as applicable, when the need therefor by the Master
Servicer or applicable Servicer no longer exists unless (i) the Mortgage Loan
shall be liquidated, in which case, upon receipt of a certificate of a Servicing
Officer similar to that herein above specified, the trust receipt shall be
released by the Trustee or the Custodian, as applicable, to the Master Servicer
(or the applicable Servicer) or (ii) the Mortgage File has been delivered
directly or through a Servicer to an attorney, or to a public trustee or other
public official as required by law, for purposes of initiating or pursuing legal
action or other proceedings for the foreclosure of the Mortgaged Property either
judicially or non-judicially, and the Master Servicer has delivered directly or
through a Servicer to the Trustee a certificate of a Servicing Officer
certifying as to the name and address of the Person to which such Mortgage File
or such document was delivered and the purpose or purposes of such delivery.

     Section 9.13. Documents, Records and Funds in Possession of Master Servicer
To Be Held for Trustee.

     (a) The Master Servicer shall transmit, or cause the applicable Servicer to
transmit, to the Trustee such documents and instruments coming into the
possession of the Master Servicer or

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such Servicer from time to time as are required by the terms hereof to be
delivered to the Trustee. Any funds received by the Master Servicer or by a
Servicer in respect of any Mortgage Loan or which otherwise are collected by the
Master Servicer or by a Servicer as Liquidation Proceeds or Insurance Proceeds
in respect of any Mortgage Loan shall be held for the benefit of the Trustee and
the Certificateholders subject to the Master Servicer's right to retain or
withdraw from the Collection Account the Master Servicing Fee and other amounts
provided in this Agreement, and to the right of each Servicer to retain its
Servicing Fee and other amounts as provided in the applicable Servicing
Agreement. The Master Servicer shall, and shall (to the extent provided in the
applicable Servicing Agreement) cause each Servicer to, provide access to
information and documentation regarding the Mortgage Loans to the Trustee, its
agents and accountants at any time upon reasonable request and during normal
business hours, and to Certificateholders that are savings and loan
associations, banks or insurance companies, the Office of Thrift Supervision,
the FDIC and the supervisory agents and examiners of such Office and Corporation
or examiners of any other federal or state banking or insurance regulatory
authority if so required by applicable regulations of the Office of Thrift
Supervision or other regulatory authority, such access to be afforded without
charge but only upon reasonable request in writing and during normal business
hours at the offices of the Master Servicer designated by it. In fulfilling such
a request the Master Servicer shall not be responsible for determining the
sufficiency of such information.

     (b) All Mortgage Files and funds collected or held by, or under the control
of, the Master Servicer, or any Servicer, in respect of any Mortgage Loans,
whether from the collection of principal and interest payments or from
Liquidation Proceeds or Insurance Proceeds, shall be held by the Master
Servicer, or by such Servicer, for and on behalf of the Trustee and the
Certificateholders and shall be and remain the sole and exclusive property of
the Trustee; provided, however, that the Master Servicer and each Servicer shall
be entitled to setoff against, and deduct from, any such funds any amounts that
are properly due and payable to the Master Servicer or such Servicer under this
Agreement or the applicable Servicing Agreement and shall be authorized to remit
such funds to the Trustee in accordance with this Agreement.

     (c) The Master Servicer hereby acknowledges that concurrently with the
execution of this Agreement, the Trustee shall own or, to the extent that a
court of competent jurisdiction shall deem the conveyance of the Mortgage Loans
from either Seller to the Depositor not to constitute a sale, the Trustee shall
have a security interest in such Mortgage Loans and in all Mortgage Files
representing such Mortgage Loans and in all funds now or hereafter held by, or
under the control of, a Servicer or the Master Servicer that are collected by
such Servicer or the Master Servicer in connection with such Mortgage Loans,
whether as scheduled installments of principal and interest or as full or
partial prepayments of principal or interest or as Liquidation Proceeds or
Insurance Proceeds or otherwise, and in all proceeds of the foregoing and
proceeds of proceeds (but excluding any fee or other amounts to which such
Servicer is entitled under the applicable Servicing Agreement, or the Master
Servicer or the Depositor is entitled to hereunder); and the Master Servicer
agrees that so long as the Mortgage Loans are assigned to and held by the
Trustee, all documents or instruments constituting part of the Mortgage Files,
and such funds relating to the Mortgage Loans which come into the possession or
custody of, or which are subject to the control of, the Master Servicer or any
Servicer shall be held by the Master Servicer or such Servicer for and on behalf
of the Trustee as the Trustee's agent and bailee for purposes of

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perfecting the Trustee's security interest therein as provided by the applicable
Uniform Commercial Code or other laws.

     (d) The Master Servicer agrees that it shall not, and shall not authorize
any Servicer to, create, incur or subject any Mortgage Loans, or any funds that
are deposited in any custodial account, Escrow Account or the Collection
Account, or any funds that otherwise are or may become due or payable to the
Trustee, to any claim, lien, security interest, judgment, levy, writ of
attachment or other encumbrance, nor assert by legal action or otherwise any
claim or right of setoff against any Mortgage Loan or any funds collected on, or
in connection with, a Mortgage Loan.

     Section 9.14. Representations and Warranties of the Master Servicer.

     (a) The Master Servicer hereby represents and warrants to the Depositor and
the Trustee, for the benefit of the Certificateholders and the Certificate
Insurer, as of the Closing Date that:

         (i) it is validly existing and in good standing under the jurisdiction
     of its formation, and as Master Servicer has full power and authority to
     transact any and all business contemplated by this Agreement and to
     execute, deliver and comply with its obligations under the terms of this
     Agreement, the execution, delivery and performance of which have been duly
     authorized by all necessary corporate action on the part of the Master
     Servicer;

         (ii) the execution and delivery of this Agreement by the Master
     Servicer and its performance and compliance with the terms of this
     Agreement will not (A) violate the Master Servicer's charter or bylaws, (B)
     violate any law or regulation or any administrative decree or order to
     which it is subject or (C) constitute a default (or an event which, with
     notice or lapse of time, or both, would constitute a default) under, or
     result in the breach of, any material contract, agreement or other
     instrument to which the Master Servicer is a party or by which it is bound
     or to which any of its assets are subject, which violation, default or
     breach would materially and adversely affect the Master Servicer's ability
     to perform its obligations under this Agreement;

         (iii) this Agreement constitutes, assuming due authorization, execution
     and delivery hereof by the other respective parties hereto, a legal, valid
     and binding obligation of the Master Servicer, enforceable against it in
     accordance with the terms hereof, except as such enforcement may be limited
     by bankruptcy, insolvency, reorganization, moratorium and other laws
     affecting the enforcement of creditors' rights in general, and by general
     equity principles (regardless of whether such enforcement is considered in
     a proceeding in equity or at law);

         (iv) the Master Servicer is not in default with respect to any order or
     decree of any court or any order or regulation of any federal, state,
     municipal or governmental agency to the extent that any such default would
     materially and adversely affect its performance hereunder;

         (v) the Master Servicer is not a party to or bound by any agreement or
     instrument or subject to any charter provision, bylaw or any other
     corporate restriction or

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     any judgment, order, writ, injunction, decree, law or regulation that may
     materially and adversely affect its ability as Master Servicer to perform
     its obligations under this Agreement or that requires the consent of any
     third person to the execution of this Agreement or the performance by the
     Master Servicer of its obligations under this Agreement;

         (vi) no litigation is pending or, to the best of the Master Servicer's
     knowledge, threatened against the Master Servicer which would prohibit its
     entering into this Agreement or performing its obligations under this
     Agreement;

         (vii) the Master Servicer, or an affiliate thereof the primary business
     of which is the servicing of conventional residential mortgage loans, is an
     FNMA- and FHLMC approved seller/servicer;

         (viii) no consent, approval, authorization or order of any court or
     governmental agency or body is required for the execution, delivery and
     performance by the Master Servicer of or compliance by the Master Servicer
     with this Agreement or the consummation of the transactions contemplated by
     this Agreement, except for such consents, approvals, authorizations and
     orders (if any) as have been obtained;

         (ix) the consummation of the transactions contemplated by this
     Agreement are in the ordinary course of business of the Master Servicer;
     and

         (x) the Master Servicer has obtained an Errors and Omissions Insurance
     Policy and a Fidelity Bond in accordance with Section 9.02, each of which
     is in full force and effect, and each of which provides at least such
     coverage as is required hereunder.

     (b) It is understood and agreed that the representations and warranties set
forth in this Section 9.14 shall survive the execution and delivery of this
Agreement. The Master Servicer shall indemnify the Depositor and the Trustee and
hold them harmless against any loss, damages, penalties, fines, forfeitures,
legal fees and related costs, judgments, and other costs and expenses resulting
from any claim, demand, defense or assertion based on or grounded upon, or
resulting from, a breach of the Master Servicer's representations and warranties
contained in Section 9.14(a). Notwithstanding anything in this Agreement to the
contrary, the Master Servicer shall not be liable for special, indirect or
consequential losses or damages of any kind whatsoever (including, but not
limited to, lost profits). It is understood and agreed that the enforcement of
the obligation of the Master Servicer set forth in this Section to indemnify the
Depositor and the Trustee as provided in this Section constitutes the sole
remedy (other than as set forth in Section 6.14) of the Depositor and the
Trustee respecting a breach of the foregoing representations and warranties.
Such indemnification shall survive any termination of the Master Servicer as
Master Servicer hereunder, and any termination of this Agreement.

     Any cause of action against the Master Servicer relating to or arising out
of the breach of any representations and warranties made in this Section shall
accrue upon discovery of such breach by either the Depositor, the Master
Servicer, the Trustee or the Certificate Insurer or notice thereof by any one of
such parties to the other parties.

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     (c) It is understood and agreed that the representations and warranties of
the Depositor set forth in Sections 2.03(a) through (f) shall survive the
execution and delivery of this Agreement. The Depositor shall indemnify the
Master Servicer and hold it harmless against any loss, damages, penalties,
fines, forfeitures, legal fees and related costs, judgments, and other costs and
expenses resulting from any claim, demand, defense or assertion based on or
grounded upon, or resulting from, a breach of the Depositor's representations
and warranties contained in Sections 2.03(a) through (f) hereof. It is
understood and agreed that the enforcement of the obligation of the Depositor
set forth in this Section to indemnify the Master Servicer as provided in this
Section constitutes the sole remedy of the Master Servicer respecting a breach
by the Depositor of the representations and warranties in Sections 2.03(a)
through (f) hereof.

     Any cause of action against the Depositor relating to or arising out of the
breach of the representations and warranties made in Sections 2.03(a) through
(f) hereof shall accrue upon discovery of such breach by either the Depositor or
the Master Servicer or notice thereof by any one of such parties to the other
parties.

     Section 9.15. Closing Certificate and Opinion.

     On or before the Closing Date, the Master Servicer shall cause to be
delivered to the Depositor and Lehman Brothers Inc. an Opinion of Counsel, dated
the Closing Date, in form and substance reasonably satisfactory to the Depositor
and Lehman Brothers Inc., as to the due authorization, execution and delivery of
this Agreement by the Master Servicer and the enforceability thereof.

     Section 9.16. Standard Hazard and Flood Insurance Policies.

     For each Mortgage Loan (other than a Cooperative Loan), the Master Servicer
shall maintain, or cause to be maintained by each Servicer, standard fire and
casualty insurance and, where applicable, flood insurance, all in accordance
with the provisions of this Agreement and the related Servicing Agreement, as
applicable. It is understood and agreed that such insurance shall be with
insurers meeting the eligibility requirements set forth in the applicable
Servicing Agreement and that no earthquake or other additional insurance is to
be required of any Mortgagor or to be maintained on property acquired in respect
of a defaulted loan, other than pursuant to such applicable laws and regulations
as shall at any time be in force and as shall require such additional insurance.

     Pursuant to Section 4.01, any amounts collected by the Master Servicer, or
by any Servicer, under any insurance policies maintained pursuant to this
Section 9.16 (other than amounts to be applied to the restoration or repair of
the property subject to the related Mortgage or released to the Mortgagor in
accordance with the Master Servicer's or the Servicer's normal servicing
procedures and Accepted Servicing Practices) shall be deposited into the
Collection Account, subject to withdrawal pursuant to Section 4.02. Any cost
incurred by the Master Servicer or any Servicer in maintaining any such
insurance if the Mortgagor defaults in its obligation to do so shall be added to
the amount owing under the Mortgage Loan where the terms of the Mortgage Loan so
permit; provided, however, that the addition of any such cost shall not be taken
into account for purposes of calculating the distributions to be made to

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Certificateholders and shall be recoverable by the Master Servicer or such
Servicer pursuant to Section 4.02(v).

     Section 9.17. Presentment of Claims and Collection of Proceeds.

     The Master Servicer shall, or shall cause each Servicer (to the extent
provided in the applicable Servicing Agreement) to, prepare and present on
behalf of the Trustee and the Certificateholders all claims under the Insurance
Policies with respect to the Mortgage Loans, and take such actions (including
the negotiation, settlement, compromise or enforcement of the insured's claim)
as shall be necessary to realize recovery under such policies. Any proceeds
disbursed to the Master Servicer (or disbursed to a Servicer and remitted to the
Master Servicer) in respect of such policies or bonds shall be promptly
deposited in the Collection Account upon receipt, except that any amounts
realized that are to be applied to the repair or restoration of the related
Mortgaged Property or released to the Mortgagor in accordance with the Master
Servicer's or the Servicer's normal servicing procedures need not be so
deposited (or remitted).

     Section 9.18. Maintenance of the Primary Mortgage Insurance Policies.

     (a) The Master Servicer shall not take, or knowingly permit any Servicer
(consistent with the applicable Servicing Agreement) to take, any action that
would result in non-coverage under any applicable Primary Mortgage Insurance
Policy of any loss which, but for the actions of such Master Servicer or
Servicer, would have been covered thereunder. To the extent that coverage is
available, the Master Servicer shall use its best reasonable efforts to keep in
force and effect, or to cause each Servicer to keep in force and effect (to the
extent that the Mortgage Loan requires the Mortgagor to maintain such
insurance), primary mortgage insurance applicable to each Mortgage Loan in
accordance with the provisions of this Agreement and the related Servicing
Agreement, as applicable. The Master Servicer shall not, and shall not permit
any Servicer to, cancel or refuse to renew any such Primary Mortgage 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 except as required by applicable
law or in accordance with the provisions of this Agreement and the related
Servicing Agreement, as applicable.

     (b) The Master Servicer agrees to present, or to cause each Servicer to
present, on behalf of the Trustee and the Certificateholders, claims to the
insurer under any Primary Mortgage Insurance Policies and, in this regard, to
take such reasonable action as shall be necessary to permit recovery under any
Primary Mortgage Insurance Policies respecting defaulted Mortgage Loans.
Pursuant to Section 4.01, any amounts collected by the Master Servicer or any
Servicer under any Primary Mortgage Insurance Policies shall be deposited in the
Collection Account, subject to withdrawal pursuant to Section 4.02.

     Section 9.19. Trustee To Retain Possession of Certain Insurance Policies
and Documents.

     The Trustee (or its custodian, if any, as directed by the Trustee), shall
retain possession and custody of the originals of the Primary Mortgage Insurance
Policies or certificate of insurance if applicable and any certificates of
renewal as to the foregoing as may be issued from time to time as contemplated
by this Agreement. Until all amounts distributable in respect of the

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Certificates have been distributed in full and the Master Servicer otherwise has
fulfilled its obligations under this Agreement, the Trustee (or its custodian,
if any, as directed by the Trustee) shall also retain possession and custody of
each Mortgage File in accordance with and subject to the terms and conditions of
this Agreement. The Master Servicer shall promptly deliver or cause to be
delivered to the Trustee (or its custodian, if any, as directed by the Trustee),
upon the execution or receipt thereof the originals of the Primary Mortgage
Insurance Policies and any certificates of renewal thereof, and such other
documents or instruments that constitute portions of the Mortgage File that come
into the possession of the Master Servicer from time to time.

     Section 9.20. Realization Upon Defaulted Mortgage Loans.

     The Master Servicer shall use its reasonable best efforts to, or to cause
each Servicer to, foreclose upon, repossess or otherwise comparably convert the
ownership of Mortgaged Properties securing such of the Mortgage Loans as come
into and continue in default and as to which no satisfactory arrangements can be
made for collection of delinquent payments, all in accordance with the
applicable Servicing Agreement. Alternatively, the Master Servicer may take, or
authorize any Servicer to take, other actions in respect of a defaulted Mortgage
Loan, which may include (i) accepting a short sale (a payoff of the Mortgage
Loan for an amount less than the total amount contractually owed in order to
facilitate a sale of the Mortgaged Property by the Mortgagor) or permitting a
short refinancing (a payoff of the Mortgage Loan for an amount less than the
total amount contractually owed in order to facilitate refinancing transactions
by the Mortgagor not involving a sale of the Mortgaged Property), (ii) arranging
for a repayment plan or (iii) agreeing to a modification in accordance with
Section 9.04. In connection with such foreclosure or other conversion or action,
the Master Servicer shall, consistent with Section 9.18, follow such practices
and procedures as it shall reasonably determine to be in the best interests of
the Trust Fund and the Certificateholders and which shall be consistent with its
customary practices in performing its general mortgage servicing activities;
provided that the Master Servicer shall not be liable in any respect hereunder
if the Master Servicer is acting in connection with any such foreclosure or
other conversion or action in a manner that is consistent with the provisions of
this Agreement. Neither the Master Servicer, nor any Servicer, shall be required
to expend its own funds or incur other reimbursable charges in connection with
any foreclosure, or attempted foreclosure which is not completed, or toward the
correction of any default on a related senior mortgage loan, or towards the
restoration of any property unless it shall determine (i) that such restoration
and/or foreclosure will increase the proceeds of liquidation of the Mortgage
Loan to the Certificateholders after reimbursement to itself for such expenses
or charges and (ii) that such expenses and charges will be recoverable to it
through Liquidation Proceeds or Insurance Proceeds (as provided in Section
4.02).

     Section 9.21. Compensation to the Master Servicer.

     The Master Servicer shall be entitled to withdraw from the Collection
Account, subject to Section 5.05, the Master Servicing Fee to the extent
permitted by Section 4.02(vi). Servicing compensation in the form of assumption
fees, if any, late payment charges, as collected, if any, or otherwise
(including any Prepayment Penalty Amount) shall be retained by the Master
Servicer (or the applicable Servicer) and shall not be deposited in the
Collection Account. If the Master Servicer does not retain or withdraw the
Master Servicing Fee from the Collection Account as provided herein, the Master
Servicer shall be entitled to direct the Trustee to pay the

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Master Servicing Fee to such Master Servicer by withdrawal from the Certificate
Account. The Master Servicer shall be required to pay all expenses incurred by
it in connection with its activities hereunder and shall not be entitled to
reimbursement therefor except as provided in this Agreement. Pursuant to Section
4.01(e), all income and gain realized from any investment of funds in the
Collection Account shall be for the benefit of the Master Servicer as additional
compensation. The provisions of this Section 9.21 are subject to the provisions
of Section 6.14(b).

     Section 9.22. REO Property.

     (a) In the event the Trust Fund acquires ownership of any REO Property in
respect of any Mortgage Loan, the deed or certificate of sale shall be issued to
the Trustee, or to its nominee, on behalf of the Certificateholders. The Master
Servicer shall use its reasonable best efforts to sell, or, to the extent
provided in the applicable Servicing Agreement, cause the applicable Servicer to
sell, any REO Property as expeditiously as possible and in accordance with the
provisions of this Agreement and the related Servicing Agreement, as applicable,
but in all events within the time period, and subject to the conditions set
forth in Article X hereof. Pursuant to its efforts to sell such REO Property,
the Master Servicer shall protect and conserve, or cause the applicable Servicer
to protect and conserve, such REO Property in the manner and to such extent
required by the applicable Servicing Agreement, subject to Article X hereof.

     (b) The Master Servicer shall deposit or cause to be deposited all funds
collected and received by it, or recovered from any Servicer, in connection with
the operation of any REO Property in the Collection Account.

     (c) The Master Servicer and the applicable Servicer, upon the final
disposition of any REO Property, shall be entitled to reimbursement for any
related unreimbursed Advances as well as any unpaid Master Servicing Fees or
Servicing Fees from Liquidation Proceeds received in connection with the final
disposition of such REO Property; provided, that any such unreimbursed Advances
as well as any unpaid Master Servicing Fees or Servicing Fees may be reimbursed
or paid, as the case may be, prior to final disposition, out of any net rental
income or other net amounts derived from such REO Property.

     (d) The Liquidation Proceeds from the final disposition of the REO
Property, net of any payment to the Master Servicer and the applicable Servicer
as provided above, shall be deposited in the Collection Account on or prior to
the Determination Date in the month following receipt thereof (and the Master
Servicer shall provide prompt written notice to the Trustee upon such deposit)
and be remitted by wire transfer in immediately available funds to the Trustee
for deposit into the Certificate Account on the next succeeding Deposit Date.

     Section 9.23. [Omitted]

     Section 9.24. Reports to the Trustee.

     (a) Not later than 30 days after each Distribution Date, the Master
Servicer shall forward to the Trustee a statement, deemed to have been certified
by a Servicing Officer, setting forth the status of the Collection Account
maintained by the Master Servicer as of the close of business on the related
Distribution Date, indicating that all distributions required by this Agreement
to be

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made by the Master Servicer have been made (or if any required distribution has
not been made by the Master Servicer, specifying the nature and status thereof)
and showing, for the period covered by such statement, the aggregate of deposits
into and withdrawals from the Collection Account maintained by the Master
Servicer. Copies of such statement shall be provided by the Master Servicer to
the Depositor, Attention: Contract Finance, and, upon request, any
Certificateholders (or by the Trustee at the Master Servicer's expense if the
Master Servicer shall fail to provide such copies (unless (i) the Master
Servicer shall have failed to provide the Trustee with such statement or (ii)
the Trustee shall be unaware of the Master Servicer's failure to provide such
statement)).

     (b) Not later than two Business Days following each Distribution Date, the
Master Servicer shall deliver to the Person designated by the Depositor, in a
format consistent with other electronic loan level reporting supplied by the
Master Servicer in connection with similar transactions, "loan level"
information with respect to the Mortgage Loans as of the related Determination
Date, to the extent that such information has been provided to the Master
Servicer by the Servicers or by the Depositor.

     Section 9.25. Annual Officer's Certificate as to Compliance.

     (a) The Master Servicer shall deliver to the Trustee, the Rating Agencies
and the Certificate Insurer on or before August 31 of each year, commencing on
August 31, 2002, an Officer's Certificate, certifying that with respect to the
period ending on the immediately preceding December 31; (i) such Servicing
Officer has reviewed the activities of such Master Servicer during the preceding
calendar year or portion thereof and its performance under this Agreement; (ii)
to the best of such Servicing Officer's knowledge, based on such review, such
Master Servicer has performed and fulfilled its duties, responsibilities and
obligations under this Agreement in all material respects throughout such year,
or, if there has been a default in the fulfillment of any such duties,
responsibilities or obligations, specifying each such default known to such
Servicing Officer and the nature and status thereof, (iii) nothing has come to
the attention of such Servicing Officer to lead such Servicing Officer to
believe that any Servicer has failed to perform any of its duties,
responsibilities and obligations under its Servicing Agreement in all material
respects throughout such year, or, if there has been a material default in the
performance or fulfillment of any such duties, responsibilities or obligations,
specifying each such default known to such Servicing Officer and the nature and
status thereof, and (iv) the Master Servicer has received from each Servicer
such Servicer's annual certificate of compliance and a copy of such Servicer's
annual audit report, in each case to the extent required under the applicable
Servicing Agreement, or, if any such certificate or report has not been received
by the Master Servicer, the Master Servicer is using its best reasonable efforts
to obtain such certificate or report.

     (b) Copies of such statements shall be provided to any Certificateholder
upon request, by the Master Servicer or by the Trustee at the Master Servicer's
expense if the Master Servicer failed to provide such copies (unless (i) the
Master Servicer shall have failed to provide the Trustee with such statement or
(ii) the Trustee shall be unaware of the Master Servicer's failure to provide
such statement).

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     Section 9.26. Annual Independent Accountants' Servicing Report.

     If the Master Servicer has, during the course of any fiscal year, directly
serviced any of the Mortgage Loans, then the Master Servicer at its expense
shall cause a nationally recognized firm of independent certified public
accountants to furnish a statement to the Trustee, the Certificate Insurer, the
Rating Agencies and the Depositor on or before August 31 of each year,
commencing on August 31, 2002, to the effect that, with respect to the most
recently ended fiscal year, such firm has examined certain records and documents
relating to the Master Servicer's performance of its servicing obligations under
this Agreement and pooling and servicing and trust agreements in material
respects similar to this Agreement and to each other and that, on the basis of
such examination conducted substantially in compliance with the audit program
for mortgages serviced for FHLMC or the Uniform Single Attestation Program for
Mortgage Bankers, such firm is of the opinion that the Master Servicer's
activities have been conducted in compliance with this Agreement, or that such
examination has disclosed no material items of noncompliance except for (i) such
exceptions as such firm believes to be immaterial, (ii) such other exceptions as
are set forth in such statement and (iii) such exceptions that the Uniform
Single Attestation Program for Mortgage Bankers or the Audit Program for
Mortgages Serviced by FHLMC requires it to report. Copies of such statements
shall be provided to any Certificateholder upon request by the Master Servicer,
or by the Trustee at the expense of the Master Servicer if the Master Servicer
shall fail to provide such copies. If such report discloses exceptions that are
material, the Master Servicer shall advise the Trustee whether such exceptions
have been or are susceptible of cure, and will take prompt action to do so.

     Section 9.27. Merger or Consolidation.

     Any Person into which the Master Servicer may be merged or consolidated, or
any Person resulting from any merger, conversion, other change in form or
consolidation to which the Master Servicer shall be a party, or any Person
succeeding to the business of the Master Servicer, shall be the successor to the
Master Servicer 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 resulting
Person to the Master Servicer shall be a Person that shall be qualified and
approved to service mortgage loans for FNMA or FHLMC and shall have a net worth
of not less than $15,000,000.

     Section 9.28. Resignation of Master Servicer.

     Except as otherwise provided in Sections 9.27 and 9.29 hereof, the Master
Servicer shall not resign from the obligations and duties hereby imposed on it
unless it or the Trustee determines that the Master Servicer's duties hereunder
are no longer permissible under applicable law or are in material conflict by
reason of applicable law with any other activities carried on by it and cannot
be cured. Any such determination permitting the resignation of the Master
Servicer shall be evidenced by an Opinion of Counsel that shall be Independent
to such effect delivered to the Trustee. No such resignation shall become
effective until the Trustee shall have assumed, or a successor master servicer
shall have been appointed by the Trustee and until such successor shall have
assumed, the Master Servicer's responsibilities and obligations under this
Agreement. Notice of such resignation shall be given promptly by the Master
Servicer to the Depositor.

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     Section 9.29. Assignment or Delegation of Duties by the Master Servicer.

     Except as expressly provided herein, the Master Servicer shall not assign
or transfer any of its rights, benefits or privileges hereunder to any other
Person, or delegate to or subcontract with, or authorize or appoint any other
Person to perform any of the duties, covenants or obligations to be performed by
the Master Servicer hereunder; provided, however, that the Master Servicer shall
have the right without the prior written consent of the Trustee, the Depositor
or the Rating Agencies to delegate or assign to or subcontract with or authorize
or appoint an Affiliate of the Master Servicer to perform and carry out any
duties, covenants or obligations to be performed and carried out by the Master
Servicer hereunder. In no case, however, shall any such delegation,
subcontracting or assignment to an Affiliate of the Master Servicer relieve the
Master Servicer of any liability hereunder. Notice of such permitted assignment
shall be given promptly by the Master Servicer to the Depositor and the Trustee.
If, pursuant to any provision hereof, the duties of the Master Servicer are
transferred to a successor master servicer, the entire amount of the Master
Servicing Fees and other compensation payable to the Master Servicer pursuant
hereto, including amounts payable to or permitted to be retained or withdrawn by
the Master Servicer pursuant to Section 9.21 hereof, shall thereafter be payable
to such successor master servicer.

     Section 9.30. Limitation on Liability of the Master Servicer and Others.

     Neither the Master Servicer nor any of the directors, officers, employees
or agents of the Master Servicer shall be under any liability to the Trustee or
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 Master Servicer or
any such person against any liability that would otherwise be imposed by reason
of willful misfeasance, bad faith or negligence in its performance of its duties
or by reason of reckless disregard for its obligations and duties under this
Agreement. The Master Servicer and any director, officer, employee or agent of
the Master Servicer shall be entitled to indemnification by the Trust Fund and
will be held harmless against any loss, liability or expense incurred in
connection with any legal action relating to this Agreement or the Certificates
other than any loss, liability or expense incurred by reason of willful
misfeasance, bad faith or negligence in the performance of his or its duties
hereunder or by reason of reckless disregard of his or its obligations and
duties hereunder. The Master Servicer and any director, officer, employee or
agent of the Master 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 Master Servicer shall be under no obligation to appear
in, prosecute or defend any legal action that is not incidental to its duties to
master service the Mortgage Loans in accordance with this Agreement and that in
its opinion may involve it in any expenses or liability; provided, however, that
the Master Servicer may in its sole discretion undertake any such action that it
may deem necessary or desirable in respect to this Agreement and the rights and
duties of the parties hereto and the interests of 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 Master Servicer shall be entitled to be reimbursed therefor
out of the Collection Account it maintains as provided by Section 4.02.

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     Section 9.31. Indemnification; Third-Party Claims.

     The Master Servicer agrees to indemnify the Depositor and the Trustee, and
hold them harmless against any and all claims, losses, penalties, fines,
forfeitures, legal fees and related costs, judgments, and any other costs,
liability, fees and expenses that the Depositor and the Trustee may sustain as a
result of the failure of the Master Servicer to perform its duties and master
service the Mortgage Loans in compliance with the terms of this Agreement. The
Depositor and the Trustee shall immediately notify the Master Servicer if a
claim is made by a third party with respect to this Agreement or the Mortgage
Loans entitling the Depositor or the Trustee to indemnification hereunder,
whereupon the Master Servicer shall assume the defense of any such claim and pay
all expenses in connection therewith, including counsel fees, and promptly pay,
discharge and satisfy any judgment or decree which may be entered against it or
them in respect of such claim.

                                   ARTICLE X

                              REMIC ADMINISTRATION

     Section 10.01. REMIC Administration.

     (a) As set forth in the Preliminary Statement hereto, the Trustee shall
elect REMIC status in accordance with the REMIC Provisions with respect to each
of the Lower Tier REMIC and the Upper Tier REMIC. The Trustee shall make such
elections on Forms 1066 or other appropriate federal tax or information return
for the taxable year ending on the last day of the calendar year in which the
Certificates are issued. For the purposes of such elections, each of the Lower
Tier Interests, other than the Class LT-R Interest, is hereby designated as a
regular interest in the Lower Tier REMIC, and each Certificate, other than the
Class 2-A5 Certificates and the Class R Certificate, and each of the seven
Components of the Class 2-A5 Certificates is hereby designated as a regular
interest in the Upper Tier REMIC. The Class LT-R Interest is hereby designated
as the sole residual interest in the Lower Tier REMIC. The Class R Certificate
evidences ownership of the Class LT-R Interest and is also hereby designated as
the sole residual interest in the Upper Tier REMIC.

     (b) The Closing Date is hereby designated as the "Startup Day" of each
REMIC within the meaning of section 86OG(a)(9) of the Code. The latest possible
maturity date for purposes of Treasury Regulation 1.86OG-1(a)(4) will be the
Latest Possible Maturity Date.

     (c) The Trustee shall pay any and all tax related expenses (not including
taxes) of each REMIC, including but not limited to any professional fees or
expenses related to audits or any administrative or judicial proceedings with
respect to such REMIC that involve the Internal Revenue Service or state tax
authorities, but only to the extent that (i) such expenses are ordinary or
routine expenses, including expenses of a routine audit but not expenses of
litigation (except as described in (ii)); or (ii) such expenses or liabilities
(including taxes and penalties) are attributable to the negligence or willful
misconduct of the Trustee in fulfilling its duties hereunder (including its
duties as tax return preparer). The Trustee shall be entitled to reimbursement
of expenses to the extent provided in clause (i) above from the Certificate
Account.

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     (d) The Trustee shall prepare, sign and file, all of each REMIC's federal
and state tax and information returns as such REMIC's direct representative. The
expenses of preparing and filing such returns shall be borne by the Trustee. If
any Disqualified Organization acquires any Ownership Interest in a Residual
Certificate, then the Trustee will upon request provide to the Internal Revenue
Service, and to the persons specified in Sections 860E(e)(3) and (6) of the
Code, such information as required in Section 860D(a)(6)(B) of the code needed
to compute the tax imposed under Section 860E(e) of the Code on transfers of
residual interests to disqualified organizations. The Trustee shall be entitled
to additional compensation from such person for the cost of providing such
information.

     (e) The Trustee shall perform on behalf of each REMIC all reporting and
other tax compliance duties that are the responsibility of such REMIC under the
Code, the REMIC Provisions, or other compliance guidance issued by the Internal
Revenue Service or any state or local taxing authority. Among its other duties,
if required by the Code, the REMIC Provisions, or other such guidance, the
Trustee shall provide (i) to the Treasury or other governmental authority such
information as is necessary for the application of any tax relating to the
transfer of a Residual Certificate to any disqualified person or organization
and (ii) to the Certificateholders such information or reports as are required
by the Code or REMIC Provisions.

     (f) The Trustee, the Master Servicer and the Holders of Certificates shall
take any action or cause the REMIC to take any action necessary to create or
maintain the status of such REMIC as a REMIC under the REMIC Provisions and
shall assist each other as necessary to create or maintain such status. Neither
the Trustee, the Master Servicer nor the Holder of any Residual Certificate
shall take any action, cause the REMIC to take any action or fail to take (or
fail to cause to be taken) any action that, under the REMIC Provisions, if taken
or not taken, as the case may be, could (i) endanger the status of such REMIC as
a REMIC or (ii) result in the imposition of a tax upon such REMIC (including but
not limited to the tax on prohibited transactions as defined in Code Section
860F(a)(2) and the tax on prohibited contributions set forth on Section 860G(d)
of the Code) (either such event, an "Adverse REMIC Event") unless the Trustee
and the Master Servicer have received an Opinion of Counsel (at the expense of
the party seeking to take such action) to the effect that the contemplated
action will not endanger such status or result in the imposition of such a tax.
In addition, prior to taking any action with respect to the REMIC or the assets
therein, or causing such REMIC to take any action, which is not expressly
permitted under the terms of this Agreement any Holder of a Residual Certificate
will consult with the Trustee and the Master Servicer, or their respective
designees, in writing, with respect to whether such action could cause an
Adverse REMIC Event to occur with respect to such REMIC, and no such Person
shall take any such action or cause such REMIC to take any such action as to
which the Trustee or the Master Servicer has advised it in writing that an
Adverse REMIC Event could occur.

     (g) Each Holder of a Residual Certificate shall pay when due any and all
taxes imposed on the related REMIC by federal or state governmental authorities.
To the extent that such Trust taxes are not paid by a Residual
Certificateholder, the Trustee shall pay any remaining REMIC taxes out of
current or future amounts otherwise distributable to the Holder of the Residual
Certificate in such REMIC or, if no such amounts are available, out of other
amounts held in the Collection Account, and shall reduce amounts otherwise
payable to holders of regular interests in such REMIC, as the case may be.

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     (h) The Trustee shall, for federal income tax purposes, maintain books and
records with respect to each REMIC on a calendar year and on an accrual basis.

     (i) No additional contributions of assets shall be made to any REMIC,
except as expressly provided in this Agreement with respect to eligible
substitute mortgage loans.

     (j) Neither the Trustee nor the Master Servicer shall enter into any
arrangement by which any REMIC will receive a fee or other compensation for
services.

     (k) Upon the request of any Rating Agency, the Trustee shall deliver to
such Rating Agency an Officer's Certificate stating the Trustee's compliance
with the provisions of this Section 10.01 applicable to it.

     Section 10.02. Prohibited Transactions and Activities.

     Neither the Depositor, the Master Servicer nor the Trustee shall sell,
dispose of, or substitute for any of the Mortgage Loans, except in a disposition
pursuant to (i) the foreclosure of a Mortgage Loan, (ii) the bankruptcy of the
Trust Fund, (iii) the termination of each REMIC pursuant to Article VII of this
Agreement, (iv) a substitution pursuant to Article II of this Agreement or (v) a
repurchase of Mortgage Loans pursuant to Article II of this Agreement, nor
acquire any assets for any REMIC, nor sell or dispose of any investments in the
Certificate Account for gain, nor accept any contributions to the REMIC after
the Closing Date, unless it has received an Opinion of Counsel (at the expense
of the party causing such sale, disposition, or substitution) that such
disposition, acquisition, substitution, or acceptance will not (a) affect
adversely the status of such REMIC as a REMIC or of the Certificates other than
the Residual Certificates as the regular interests therein, (b) affect the
distribution of interest or principal on the Certificates, (c) result in the
encumbrance of the assets transferred or assigned to the Trust Fund (except
pursuant to the provisions of this Agreement) or (d) cause such REMIC to be
subject to a tax on prohibited transactions or prohibited contributions pursuant
to the REMIC Provisions.

     Section 10.03. Indemnification with Respect to Certain Taxes and Loss of
REMIC Status.

     (a) In the event that a REMIC fails to qualify as a REMIC, loses its status
as a REMIC, or incurs federal, state or local taxes as a result of a prohibited
transaction or prohibited contribution under the REMIC Provisions due to the
negligent performance by the Trustee of its duties and obligations set forth
herein, the Trustee shall indemnify the Holder of the Residual Certificate
against any and all losses, claims, damages, liabilities or expenses ("Losses")
resulting from such negligence; provided, however, that the Trustee shall not be
liable for any such Losses attributable to the action or inaction of the Master
Servicer, the Depositor, or the Holder of such Residual Certificate, as
applicable, nor for any such Losses resulting from misinformation provided by
the Holder of such Residual Certificate on which the Trustee has relied. The
foregoing shall not be deemed to limit or restrict the rights and remedies of
the Holder of such Residual Certificate now or hereafter existing at law or in
equity. Notwithstanding the foregoing, however, in no event shall the Trustee
have any liability (1) for any action or omission that is taken in accordance
with and in compliance with the express terms of, or which is expressly
permitted by the terms

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of, this Agreement, (2) for any Losses other than arising out of a negligent
performance by the Trustee of its duties and obligations set forth herein, and
(3) for any special or consequential damages to Certificateholders (in addition
to payment of principal and interest on the Certificates).

     Section 10.04. REO Property.

     (a) Notwithstanding any other provision of this Agreement, the Master
Servicer, acting on behalf of the Trustee hereunder, shall not (except to the
extent provided in the applicable Servicing Agreement) permit any Servicer to,
rent, lease, or otherwise earn income on behalf of any REMIC with respect to any
REO Property which might cause such REO Property to fail to qualify as
"foreclosure" property within the meaning of section 860G(a)(8) of the Code or
result in the receipt by any REMIC of any "income from non-permitted assets"
within the meaning of section 860F(a)(2) of the Code or any "net income from
foreclosure property" which is subject to tax under the REMIC Provisions unless
the Master Servicer has advised, or has caused the applicable Servicer to
advise, the Trustee in writing to the effect that, under the REMIC Provisions,
such action would not adversely affect the status of the REMIC as a REMIC and
any income generated for such REMIC by the REO Property would not result in the
imposition of a tax upon such REMIC.

     (b) The Master Servicer shall make, or shall cause the applicable Servicer
to make, reasonable efforts to sell any REO Property for its fair market value.
In any event, however, the Master Servicer shall, or shall cause the applicable
Servicer to, dispose of any REO Property within three years from the end of the
calendar year of its acquisition by the Trust Fund unless the Trustee has
received a grant of extension from the Internal Revenue Service to the effect
that, under the REMIC Provisions and any relevant proposed legislation and under
applicable state law, the REMIC may hold REO Property for a longer period
without adversely affecting the REMIC status of such REMIC or causing the
imposition of a Federal or state tax upon such REMIC. If the Trustee has
received such an extension, then (a) the Trustee shall provide a copy of such
extension to the Master Servicer and (b) the Trustee, or the Master Servicer,
acting on its behalf hereunder, shall, or shall cause the applicable Servicer
to, continue to attempt to sell the REO Property for its fair market value for
such period longer than three years as such extension permits (the "Extended
Period"). If the Trustee has not received such an extension and the Trustee, or
the Master Servicer acting on behalf of the Trustee hereunder, or the applicable
Servicer is unable to sell the REO Property within 33 months after its
acquisition by the Trust Fund or if the Trustee has received such an extension,
and the Trustee, or the Master Servicer acting on behalf of the Trustee
hereunder, is unable to sell the REO Property within the period ending three
months before the close of the Extended Period, the Master Servicer shall, or
shall cause the applicable Servicer to, before the end of the three year period
or the Extended Period, as applicable, (i) purchase such REO Property at a price
equal to the REO Property's fair market value or (ii) auction the REO Property
to the highest bidder (which may be the Master Servicer) in an auction
reasonably designed to produce a fair price prior to the expiration of the
three-year period or the Extended Period, as the case may be.

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                                   ARTICLE XI

                            MISCELLANEOUS PROVISIONS

     Section 11.01. Binding Nature of Agreement; Assignment.

     This Agreement shall be binding upon and inure to the benefit of the
parties hereto and their respective successors and permitted assigns.

     Section 11.02. Entire Agreement.

     This Agreement contains the entire agreement and understanding among the
parties hereto with respect to the subject matter hereof, and supersedes all
prior and contemporaneous agreements, understandings, inducements and
conditions, express or implied, oral or written, of any nature whatsoever with
respect to the subject matter hereof. The express terms hereof control and
supersede any course of performance and/or usage of the trade inconsistent with
any of the terms hereof.

     Section 11.03. Amendment.

     (a) This Agreement may be amended from time to time by the Depositor, the
Master Servicer and the Trustee, without notice to or the consent of any of the
Holders, (i) to cure any ambiguity, (ii) to cause the provisions herein to
conform to or be consistent with or in furtherance of the statements made with
respect to the Certificates, the Trust Fund or this Agreement in any Offering
Document; or to correct or supplement any provision herein which may be
inconsistent with any other provisions herein, (iii) to make any other
provisions with respect to matters or questions arising under this Agreement or
(iv) to add, delete, or amend any provisions to the extent necessary or
desirable to comply with any requirements imposed by the Code and the REMIC
Provisions. No such amendment effected pursuant to the preceding sentence shall,
as evidenced by an Opinion of Counsel, adversely affect the status of any REMIC
created pursuant to this Agreement, nor shall such amendment effected pursuant
to clause (iii) of such sentence adversely affect in any material respect the
interests of any Holder (without regard to the Class A4 Certificate Insurance
Policy). Prior to entering into any amendment without the consent of Holders
pursuant to this paragraph, the Trustee may require an Opinion of Counsel (at
the expense of the party requesting such amendment) to the effect that such
amendment is permitted under this paragraph. Any such amendment shall be deemed
not to adversely affect in any material respect any Holder if the Trustee
receives written confirmation from each Rating Agency that such amendment will
not cause such Rating Agency to reduce, qualify or withdraw the then current
rating assigned to the Certificates (in the case of the Class A4 Certificates,
determined without regard to the Class A4 Certificate Insurance Policy) (and any
Opinion of Counsel requested by the Trustee in connection with any such
amendment may rely expressly on such confirmation as the basis therefor).

     (b) This Agreement may also be amended from time to time by the Depositor,
the Master Servicer and the Trustee with the consent of the Holders of not less
than 66 2/3% of the Class Principal Amount (or Percentage Interest) of each
Class of Certificates affected thereby for the purpose of adding any provisions
to or changing in any manner or eliminating any of the

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provisions of this Agreement or of modifying in any manner the rights of the
Holders; provided, however, that no such amendment shall be made unless the
Trustee receives an Opinion of Counsel, at the expense of the party requesting
the change, that such change will not adversely affect the status of the REMIC
as a REMIC or cause a tax to be imposed on such REMIC; and provided further,
that no such amendment may (i) reduce in any manner the amount of, or delay the
timing of, payments received on Mortgage Loans which are required to be
distributed on any Certificate, without the consent of the Holder of such
Certificate or (ii) reduce the aforesaid percentages of Class Principal Amount
(or Percentage Interest) of Certificates of each Class, the Holders of which are
required to consent to any such amendment without the consent of the Holders of
100% of the Class Principal Amount (or Class Notional Amount) of each Class of
Certificates affected thereby. For purposes of this paragraph, references to
"Holder" or "Holders" shall be deemed to include, in the case of any Class of
Book-Entry Certificates, the related Certificate Owners.

     (c) Promptly after the execution of any such amendment, the Trustee shall
furnish written notification of the substance of such amendment to each Holder,
the Depositor and to the Rating Agencies.

     (d) It shall not be necessary for the consent of Holders under this Section
11.03 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 Holders shall be subject to such reasonable regulations as the
Trustee may prescribe.

     (e) Notwithstanding anything to the contrary in any Servicing Agreement,
the Trustee shall not consent to any amendment of any Servicing Agreement except
pursuant to the standards provided in this Section with respect to amendment of
this Agreement.

     (f) Notwithstanding the foregoing, the Certificate Insurer shall be
required to consent (such consent not to be unreasonably withheld) to any
amendment that has a material adverse effect in any respect on the rights and
interests of the Certificate Insurer hereunder.

     Section 11.04. Voting Rights.

     Except to the extent that the consent of all affected Certificateholders is
required pursuant to this Agreement, with respect to any provision of this
Agreement requiring the consent of Certificateholders representing specified
percentages of aggregate outstanding Certificate Principal Amount (or Notional
Amount), Certificates owned by the Depositor, the Master Servicer, the Trustee
or any Servicer or Affiliates thereof are not to be counted so long as such
Certificates are owned by the Depositor, the Master Servicer, the Trustee or any
Servicer or Affiliates thereof.

     Section 11.05. Provision of Information.

     (a) For so long as any of the Certificates of any Series or Class are
"restricted securities" within the meaning of Rule 144(a)(3) under the Act, each
of the Depositor and the Trustee agree to cooperate with each other to provide
to any Certificateholders and to any prospective purchaser of Certificates
designated by such Certificateholder, upon the request of such

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Certificateholder or prospective purchaser, any information required to be
provided to such holder or prospective purchaser to satisfy the condition set
forth in Rule 144A(d)(4) under the Act. Any reasonable, out-of-pocket expenses
incurred by the Trustee in providing such information shall be reimbursed by the
Depositor.

     (b) The Trustee will provide to any person to whom a Prospectus was
delivered, upon the request of such person specifying the document or documents
requested, (i) a copy (excluding exhibits) of any report on Form 8-K or Form
10-K filed with the Securities and Exchange Commission pursuant to Section
6.20(c) and (ii) a copy of any other document incorporated by reference in the
Prospectus. Any reasonable out-of-pocket expenses incurred by the Trustee in
providing copies of such documents shall be reimbursed by the Depositor.

     (c) On each Distribution Date, the Trustee shall deliver or cause to be
delivered by first class mail to the Depositor, Attention: Contract Finance, a
copy of the report delivered to Certificateholders pursuant to Section 4.03.

     Section 11.06. Governing Law.

     THIS AGREEMENT SHALL BE CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE
OF NEW YORK, AND THE OBLIGATIONS, RIGHTS AND REMEDIES OF THE PARTIES HEREUNDER
SHALL BE DETERMINED IN ACCORDANCE WITH SUCH LAWS WITHOUT REGARD TO CONFLICT OF
LAWS PRINCIPLES APPLIED IN NEW YORK.

     Section 11.07. Notices.

     All demands, notices and communications hereunder shall be in writing and
shall be deemed to have been duly given when delivered to such party at the
relevant address, facsimile number or electronic mail address set forth below
(or at such other address, facsimile number or electronic mail address as such
party may designate from time to time by written notice in accordance with this
Section 11.07): (a) in the case of the Depositor, Structured Asset Securities
Corporation, 200 Vesey Street, 12th Floor, New York, New York 10285, Attention:
Mark Zusy, (b) in the case of the Trustee, 11000 Broken Land Parkway, Columbia,
Maryland 21044, Attention: Corporate Trust Services (SASCO 2001-17), telecopy
number 410-884-2360, with a copy to: Wells Fargo Bank Minnesota, N.A., Sixth and
Marquette Avenue, Minneapolis, Minnesota 55475, Attention: Corporate Trust
Services, (c) in the case of the Master Servicer, Aurora Loan Services Inc.,
2530 South Parker Road, Suite 601, Aurora, Colorado 80014; Attention: Master
Servicing and (d) in the case of the Certificate Insurer, MBIA Insurance
Corporation, 113 King Street, Armonk, New York 10504, Attention: Insured
Portfolio Management-Structured Finance (SASCO 2001-17), or as to each party
such other address as may hereafter be furnished by such party to the other
parties in writing. Any notice required or permitted to be mailed to a Holder
shall be given by first class mail, postage prepaid, at the address of such
Holder as shown in the Certificate Register. Any notice so mailed within the
time prescribed in this Agreement shall be conclusively presumed to have been
duly given, whether or not the Holder receives such notice.

                                      141
<PAGE>

     Section 11.08. 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 11.09. Indulgences; No Waivers.

     Neither the failure nor any delay on the part of a party to exercise any
right, remedy, power or privilege under this Agreement shall operate as a waiver
thereof, nor shall any single or partial exercise of any right, remedy, power or
privilege preclude any other or further exercise of the same or of any other
right, remedy, power or privilege, nor shall any waiver of any right, remedy,
power or privilege with respect to any occurrence be construed as a waiver of
such right, remedy, power or privilege with respect to any other occurrence. No
waiver shall be effective unless it is in writing and is signed by the party
asserted to have granted such waiver.

     Section 11.10. Headings Not To Affect Interpretation.

     The headings contained in this Agreement are for convenience of reference
only, and they shall not be used in the interpretation hereof.

     Section 11.11. Benefits of Agreement.

     Nothing in this Agreement or in the Certificates, express or implied, shall
give to any Person, other than the parties to this Agreement and their
successors hereunder and the Holders of the Certificates, any benefit or any
legal or equitable right, power, remedy or claim under this Agreement, except to
the extent specified in Sections 11.14 and 11.15.

     Section 11.12. Special Notices to the Rating Agencies.

     (a) The Depositor shall give prompt notice to the Rating Agencies and to
the Certificate Insurer of the occurrence of any of the following events of
which it has notice:

         (i) any amendment to this Agreement pursuant to Section 11.03;

         (ii) any Assignment by the Master Servicer of its rights hereunder or
     delegation of its duties hereunder;

         (iii) the occurrence of any Event of Default described in Section 6.14;

         (iv) any notice of termination given to the Master Servicer pursuant to
     Section 6.14 and any resignation of the Master Servicer hereunder;

         (v) the appointment of any successor to any Master Servicer pursuant to
     Section 6.14; and

                                      142
<PAGE>

         (vi) the making of a final payment pursuant to Section 7.02.

     (b) All notices to the Rating Agencies provided for this Section shall be
in writing and sent by first class mail, telecopy or overnight courier, as
follows:

     If to Fitch, to:

     Fitch, Inc..
     One State Street Plaza
     New York, NY  10041
     Attention:  Residential Mortgage Surveillance

     If to S&P, to:

     Standard & Poor's Ratings Service
     55 Water Street, 41st Floor
     New York, New York 10041
     Attn:  Residential Mortgage Surveillance

     (c) The Trustee shall provide or make available to the Rating Agencies
reports prepared pursuant to Section 4.03. In addition, the Trustee shall, at
the expense of the Trust Fund, make available to each Rating Agency such
information as such Rating Agency may reasonably request regarding the
Certificates or the Trust Fund, to the extent that such information is
reasonably available to the Trustee.

     Section 11.13. Counterparts.

     This Agreement may be executed in one or more counterparts, each of which
shall be deemed to be an original, and all of which together shall constitute
one and the same instrument.

     Section 11.14. Transfer of Servicing.

     Each Seller agrees that it shall provide written notice to the Trustee, the
Certificate Insurer and the Master Servicer thirty days prior to any transfer or
assignment by it of its rights under any Servicing Agreement or of the servicing
thereunder or delegation of its rights or duties thereunder or any portion
thereof to any Person other than the initial Servicer under such Servicing
Agreement; provided that each Seller shall not be required to provide prior
notice of (i) any transfer of servicing that occurs within three months
following the Closing Date to an entity that is a Servicer on the Closing Date
or (ii) any assignment of any servicing rights from one Seller to the other
Seller. In addition, the ability of each Seller to transfer or assign its rights
and delegate its duties under any Servicing Agreement or to transfer the
servicing thereunder to a successor servicer shall be subject to the following
conditions:

         (i) Such successor servicer must be qualified to service loans for FNMA
     or FHLMC;

         (ii) Such successor servicer must satisfy the seller/servicer
     eligibility standards in the applicable Servicing Agreement, exclusive of
     any experience in mortgage loan

                                      143
<PAGE>

     origination, and must be reasonably acceptable to the Master Servicer,
     whose approval shall not be unreasonably withheld;

         (iii) Such successor servicer must execute and deliver to the Trustee
     and the Master Servicer an agreement, in form and substance reasonably
     satisfactory to the Trustee and the Master Servicer, that contains an
     assumption by such successor servicer of the due and punctual performance
     and observance of each covenant and condition to be performed and observed
     by the applicable Servicer under the applicable Servicing Agreement or, in
     the case of a transfer of servicing to a party that is already a Servicer
     pursuant to this Agreement, an agreement to add the related Mortgage Loans
     to the Servicing Agreement already in effect with such Servicer;

         (iv) If the successor servicer is not a Servicer of Mortgage Loans at
     the time of transfer, there must be delivered to the Trustee a letter from
     each Rating Agency to the effect that such transfer of servicing will not
     result in a qualification, withdrawal or downgrade of the then-current
     rating of any of the Certificates (determined without regard to the Class
     A4 Certificate Insurance Policy, in the case of the Class A4 Certificates);

         (v) The related Seller shall, at its cost and expense, take such steps,
     or cause the terminated Servicer to take such steps, as may be necessary or
     appropriate to effectuate and evidence the transfer of the servicing of the
     Mortgage Loans to such successor servicer, including, but not limited to,
     the following: (A) to the extent required by the terms of the Mortgage
     Loans and by applicable federal and state laws and regulations, the related
     Seller shall cause the prior Servicer to timely mail to each obligor under
     a Mortgage Loan any required notices or disclosures describing the transfer
     of servicing of the Mortgage Loans to the successor servicer; (B) prior to
     the effective date of such transfer of servicing, the related Seller shall
     cause the prior Servicer to transmit to any related insurer notification of
     such transfer of servicing; (C) on or prior to the effective date of such
     transfer of servicing, the related Seller shall cause the prior Servicer to
     deliver to the successor servicer all Mortgage Loan Documents and any
     related records or materials; (D) on or prior to the effective date of such
     transfer of servicing, the related Seller shall cause the prior Servicer to
     transfer to the successor servicer, or, if such transfer occurs after a
     Remittance Date but before the next succeeding Deposit Date, to the Master
     Servicer, all funds held by the applicable Servicer in respect of the
     Mortgage Loans; (E) on or prior to the effective date of such transfer of
     servicing, the related Seller shall cause the prior Servicer to, after the
     effective date of the transfer of servicing to the successor servicer,
     continue to forward to such successor servicer, within one Business Day of
     receipt, the amount of any payments or other recoveries received by the
     prior Servicer, and to notify the successor servicer of the source and
     proper application of each such payment or recovery; and (F) the related
     Seller shall cause the prior Servicer to, after the effective date of
     transfer of servicing to the successor servicer, continue to cooperate with
     the successor servicer to facilitate such transfer in such manner and to
     such extent as the successor servicer may reasonably request.

                                      144
<PAGE>

     Section 11.15. Matters Relating to the Class A4 Certificate Insurance
Policy.

     (a) All notices, statements, reports, certificates or opinions required by
this Agreement to be sent to any other party hereto or to the Class A4
Certificateholders shall also be sent, and any report or statement sent by the
Master Servicer to the Trustee shall be sent by the Trustee, as applicable, to
the Certificate Insurer at the following address:

     MBIA Insurance Corporation
     113 King Street
     Armonk, New York  10504
     Attention:  Insured Portfolio Management - Structured Finance
     Re:  Structured Asset Securities Corporation Mortgage Pass-Through
          Certificates, Series 2001-17, Class A4 Certificates

or such other address as the Certificate Insurer may hereafter furnish to the
Depositor and the Trustee.

     (b) Notwithstanding any provision to the contrary, the parties to this
Agreement agree that it is appropriate, in furtherance of the interest of such
parties as set forth herein, the Certificate Insurer receive the benefit of
Sections 4.03, 5.02, 5.07 and 11.15 as an intended third party beneficiary of
this Agreement to the extent of such provisions.

     (c) No purchase of the property of the Trust Fund pursuant to Section
7.01(b) shall occur if such purchase would result in a draw on the Class A4
Certificate Insurance Policy, unless the Certificate Insurer has consented to
such purchase.

     All references herein to the rating of the Certificates shall be without
regard to the Class A4 Certificate Insurance Policy.

                                      145
<PAGE>

     IN WITNESS WHEREOF, the Depositor, the Trustee and the Master Servicer have
caused their names to be signed hereto by their respective officers hereunto
duly authorized as of the day and year first above written.

                                             STRUCTURED ASSET SECURITIES
                                               CORPORATION, as Depositor

                                             By: /s/ Ellen V. Kiernan
                                                 -------------------------------
                                                 Name: Ellen V. Kiernan
                                                 Title: Vice President

                                             WELLS FARGO BANK MINNESOTA,
                                               NATIONAL ASSOCIATION,
                                               as Trustee

                                             By: /s/ Peter A. Gobell
                                                 -------------------------------
                                                 Name: Peter A. Gobell
                                                 Title: Assistant Vice President

                                             AURORA LOAN SERVICES INC.,
                                               as Master Servicer

                                             By: /s/ E. Todd Whittemore
                                                 -------------------------------
                                                 Name: E. Todd Whittemore
                                                 Title: Exec. Vice President

Solely for purposes of Section 11.14,
saccepted and agreed to by:

LEHMAN CAPITAL, A DIVISION OF
  LEHMAN BROTHERS HOLDINGS INC.

By: /s/ Joseph J. Kelly
    -------------------------------
    Name: Joseph J. Kelly
    Title:   Authorized Signatory

<PAGE>

Solely for purposes of Section 11.14,
accepted and agreed to by:

LEHMAN BROTHERS BANK, FSB

By: /s/ Gary Taylor
    -------------------------------------------------
    Name: Gary Taylor
    Title: Vice President

                                      147
<PAGE>

                                    EXHIBIT A
                                    ---------

                              FORMS OF CERTIFICATES

                                   [See Tab ]

                                       A-1

<PAGE>

                                   EXHIBIT B-1

                      FORM OF TRUSTEE INITIAL CERTIFICATION

                                                    ----------------------------
                                                              [Date]

Structured Asset Securities Corporation
101 Hudson Street
Jersey City, New Jersey 07302

     RE:  Trust Agreement, dated as of November 1, 2001, (the "Trust
          Agreement"), between Structured Asset Securities Corporation, as
          Depositor, Aurora Loan Services Inc., as Master Servicer and Wells
          Fargo Bank Minnesota, N.A., as Trustee, with respect to Structured
          Asset Securities Corporation Mortgage Pass-Through Certificates,
          Series 2001-17
          ------------------------------------------------------------------

Ladies and Gentlemen:

     In accordance with Section 2.01(a) of the Trust Agreement, subject to
review of the contents thereof, the undersigned, as Trustee, hereby certifies
that it has received the documents listed in Section 2.01(b) of the Trust
Agreement for each Mortgage File pertaining to each Mortgage Loan listed on
Schedule A, to the Trust Agreement.

     Capitalized words and phrases used herein and not otherwise defined herein
shall have the respective meanings assigned to them in the Trust Agreement. This
Certificate is subject in all respects to the terms of Section 2.02 of the Trust
Agreement and the Trust Agreement sections cross-referenced therein.

                                         WELLS FARGO BANK MINNESOTA, N.A.,
                                         as Trustee

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

                                      B-1
<PAGE>

                                   EXHIBIT B-2
                                   -----------

                      FORM OF TRUSTEE INTERIM CERTIFICATION

                                                    ----------------------------
                                                              [Date]

Structured Asset Securities Corporation
101 Hudson Street
Jersey City, New Jersey 07302

     RE:  Trust Agreement, dated as of November 1, 2001, (the "Trust
          Agreement"), between Structured Asset Securities Corporation, as
          Depositor, Aurora Loan Services Inc., as Master Servicer and Wells
          Fargo Bank Minnesota, N.A., as Trustee, with respect to Structured
          Asset Securities Corporation Mortgage Pass-Through Certificates,
          Series 2001-17
          ------------------------------------------------------------------

Ladies and Gentlemen:

     In accordance with Section 2.02(b) of the Trust 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 attachment hereto) it has received:

         (i) with respect to each Mortgage Loan, the original Mortgage Note
     endorsed without recourse in proper form to the order of the Trustee;

         (ii) the original of any guarantee executed in connection with the
     Mortgage Note, assigned to the Trustee;

         (iii) with respect to each Mortgage Loan other than a Cooperative Loan,
     the original recorded Mortgage with evidence of recording indicated
     thereon. If, in connection with any Mortgage Loan, the Depositor cannot
     deliver the Mortgage with evidence of recording thereon on or prior to the
     Closing Date because of a delay caused by the public recording office where
     such Mortgage has been delivered for recordation or because such Mortgage
     has been lost, the Depositor shall deliver or cause to be delivered to the
     Trustee (or its custodian), in the case of a delay due to recording, a true
     copy of such Mortgage, pending delivery of the original thereof, together
     with an Officer's Certificate of the Depositor certifying that the copy of
     such Mortgage delivered to the Trustee (or its custodian) is a true copy
     and that the original of such Mortgage has been forwarded to the public
     recording office, or, in the case of a Mortgage that has been lost, a copy
     thereof (certified as provided for under the laws of the appropriate
     jurisdiction) and a written Opinion of Counsel, memorandum of law or other
     written assurance

                                     B-2-1
<PAGE>

     acceptable to the Trustee and the Depositor that an original recorded
     Mortgage is not required to enforce the Trustee's interest in the Mortgage
     Loan;

         (iv) The original of each assumption, modification or substitution
     agreement, if any, relating to the Mortgage Loans, or, as to any
     assumption, modification or substitution agreement which cannot be
     delivered on or prior to the Closing Date because of a delay caused by the
     public recording office where such assumption, modification or substitution
     agreement has been delivered for recordation, a photocopy of such
     assumption, modification or substitution agreement, pending delivery of the
     original thereof, together with an Officer's Certificate of the Depositor
     certifying that the copy of such assumption, modification or substitution
     agreement delivered to the Trustee (or its custodian) is a true copy and
     that the original of such agreement has been forwarded to the public
     recording office;

         (v) with respect to each Non-MERS Mortgage Loan other than a
     Cooperative Loan, the original Assignment of Mortgage for each Mortgage
     Loan;

         (vi) If applicable, such original intervening assignments of the
     Mortgage, notice of transfer or equivalent instrument (each, an
     "Intervening Assignment"), as may be necessary to show a complete chain of
     assignment from the originator, or, in the case of an Intervening
     Assignment that has been lost, a written Opinion of Counsel acceptable to
     the Trustee that such original Intervening Assignment is not required to
     enforce the Trustee's interest in the Mortgage Loans;

         (vii) the original Primary Mortgage Insurance Policy or certificate, if
     private mortgage guaranty insurance is required;

         (viii) with respect to each Mortgage Loan other than a Cooperative
     Loan, the original mortgagee title insurance policy or attorney's opinion
     of title and abstract of title;

         (ix) the original of any security agreement, chattel mortgage or
     equivalent executed in connection with the Mortgage or as to any security
     agreement, chattel mortgage or their equivalent that cannot be delivered on
     or prior to the Closing Date because of a delay caused by the public
     recording office where such document has been delivered for recordation, a
     photocopy of such document, pending delivery of the original thereof,
     together with an Officer's Certificate of the Depositor certifying that the
     copy of such security agreement, chattel mortgage or their equivalent
     delivered to the Trustee (or its custodian) is a true copy and that the
     original of such document has been forwarded to the public recording
     office;

         (x) with respect to any Cooperative Loan, the Cooperative Loan
     Documents; and

                                     B-2-2
<PAGE>

         (xi) in connection with any pledge of Additional Collateral, the
     original additional collateral pledge and security agreement executed in
     connection therewith, assigned to the Trustee.

     The undersigned hereby certifies that as to each Mortgage Loan identified
on the Mortgage Loan Schedule, other than any Mortgage Loan listed on the
attachment hereto, it has reviewed the documents listed above and has determined
that each such document appears regular on its face and appears to relate to the
Mortgage Loan identified in such document.

     Capitalized words and phrases used herein shall have the respective
meanings assigned to them in the Trust Agreement. This Certificate is qualified
in all respects by the terms of said Trust Agreement including, but not limited
to, Section 2.02(b).

                                              WELLS FARGO BANK MINNESOTA, N.A.,
                                              as Trustee

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

                                     B-2-3
<PAGE>

                                  EXHIBIT B-3
                                  -----------

                       FORM OF TRUSTEE FINAL CERTIFICATION

                                                    ----------------------------
                                                              [Date]

Structured Asset Securities Corporation
101 Hudson Street
Jersey City, New Jersey 07302

     Re:  Trust Agreement, dated as of November 1, 2001, (the "Trust
          Agreement"), between Structured Asset Securities Corporation, as
          Depositor, Aurora Loan Services Inc., as Master Servicer and Wells
          Fargo Bank Minnesota, N.A., as Trustee, with respect to Structured
          Asset Securities Corporation Mortgage Pass-Through Certificates,
          Series 2001-17
          ------------------------------------------------------------------

Ladies and Gentlemen:

     In accordance with Section 2.02(d) of the Trust 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 attachment hereto) it has received the applicable documents listed in
Section 2.02(b) of the Trust Agreement.

     The undersigned hereby certifies that as to each Mortgage Loan identified
on the Mortgage Loan Schedule, other than any Mortgage Loan listed on the
attachment hereto, it has reviewed the documents listed above and has determined
that each such document appears to be complete and, based on an examination of
such documents, the information set forth in the Mortgage Loan Schedule is
correct.

     Capitalized words and phrases used herein shall have the respective
meanings assigned to them in the Trust Agreement. This Certificate is qualified
in all respects by the terms of said Trust Agreement.

                                    WELLS FARGO BANK MINNESOTA, N.A.,
                                    as Trustee

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

                                      B-3-1

<PAGE>

                                   EXHIBIT B-4

                               FORM OF ENDORSEMENT

     Pay to the order of Wells Fargo Bank Minnesota, N.A., as trustee (the
"Trustee") under the Trust Agreement dated as of November 1, 2001, among
Structured Asset Securities Corporation, as Depositor, the Trustee and the
Master Servicer relating to Structured Asset Securities Corporation Mortgage
Pass-Through Certificates, Series 2001-17, without recourse.

                                       --------------------------------------
                                          [current signatory on note]

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

                                     B-4-1

<PAGE>

                                    EXHIBIT C
                                    ---------

                  REQUEST FOR RELEASE OF DOCUMENTS AND RECEIPT

                                                    ----------------------------
                                                              [Date]

[Addressed to Trustee
or, if applicable, custodian]

     In connection with the administration of the mortgages held by you as
Trustee under a certain Trust Agreement dated as of November 1, 2001 among
Structured Asset Securities Corporation, as Depositor, Aurora Loan Services
Inc., as Master Servicer and you, as Trustee (the "Trust Agreement"), the
undersigned Master Servicer hereby requests a release of the Mortgage File held
by you as Trustee with respect to the following described Mortgage Loan for the
reason indicated below.

     Mortgagor's Name:

     Address:

     Loan No.:

     Reason for requesting file:

     1. Mortgage Loan paid in full. (The Master Servicer hereby certifies that
all amounts received in connection with the loan have been or will be credited
to the Collection Account or the Certificate Account (whichever is applicable)
pursuant to the Trust Agreement.)

     2. The Mortgage Loan is being foreclosed.

     3. Mortgage Loan substituted. (The Master Servicer hereby certifies that a
Qualifying Substitute Mortgage Loan has been assigned and delivered to you along
with the related Mortgage File pursuant to the Trust Agreement.)

     4. Mortgage Loan repurchased. (The Master Servicer hereby certifies that
the Purchase Price has been credited to the Collection Account or the
Certificate Account (whichever is applicable) pursuant to the Trust Agreement.)

     5. Other. (Describe)

     6. California Mortgage Loan expected to be paid in full.

     The undersigned acknowledges that the above Mortgage File will be held by
the undersigned in accordance with the provisions of the Trust Agreement and
will be returned to

                                      C-1
<PAGE>

you within ten (10) days of our receipt of the Mortgage File, except if the
Mortgage Loan has been paid in full, or repurchased or substituted for a
Qualifying Substitute Mortgage Loan (in which case the Mortgage File will be
retained by us permanently) and except if the Mortgage Loan is being foreclosed
or is a California Mortgage Loan specified in #6 above (in which case the
Mortgage File will be returned when no longer required by us for such purpose).

     Capitalized terms used herein shall have the meanings ascribed to them in
the Trust Agreement.

                                         -------------------------------------
                                             [Name of Master Servicer]

                                      By:
                                         -------------------------------------
                                         Name:
                                         Title: Servicing Officer

                                      C-2
<PAGE>

                                   EXHIBIT D-1
                                   -----------

          FORM OF RESIDUAL CERTIFICATE TRANSFER AFFIDAVIT (TRANSFEREE)

STATE OF         )
                 )  ss.:
COUNTY OF        )

     [NAME OF OFFICER], _________________ being first duly sworn, deposes and
says:

     1. That he [she] is [title of officer] ________________________ of [name of
Purchaser] _________________________________________ (the "Purchaser"), a
_______________________ [description of type of entity] duly organized and
existing under the laws of the [State of __________] [United States], on behalf
of which he [she] makes this affidavit.

     2. That the Purchaser's Taxpayer Identification Number is ______________.

     3. That the Purchaser is not a "disqualified organization" within the
meaning of Section 860E(e)(5) of the Internal Revenue Code of 1986, as amended
(the "Code") and will not be a "disqualified organization" as of
__________________ [date of transfer], and that the Purchaser is not acquiring a
Residual Certificate (as defined in the Agreement) for the account of, or as
agent (including a broker, nominee, or other middleman) for, any person or
entity from which it has not received an affidavit substantially in the form of
this affidavit.

     4. That the Purchaser either (x) is not, and on __________________ [date of
transfer] will not be, an employee benefit plan subject to Section 406 or
Section 407 of the Employee Retirement Income Security Act of 1974, as amended
("ERISA"), or Section 4975 of the Code, the trustee of any such plan or a person
acting on behalf of any such plan or investing the assets of any such plan to
acquire a Residual Certificate; (y) is an insurance company that is purchasing
the Certificate with funds contained in an "insurance company general account"
as defined in Section V(e) of Prohibited Transaction Class Exemption ("PTCE")
95-60 and the purchase and holding of the Certificate are covered under Section
I and III of PTCE 95-60; or (z) herewith delivers to the Trustee and shall
deliver to the Depositor an opinion of counsel (a "Benefit Plan Opinion")
satisfactory to the Trustee and the Depositor, and upon which the Trustee and
the Depositor shall be entitled to rely, to the effect that the purchase or
holding of such Residual Certificate by the Investor will not result in the
assets of the Trust Fund being deemed to be plan assets and subject to the
prohibited transaction provisions of ERISA or the Code and will not subject the
Trustee or the Depositor to any obligation in addition to those undertaken by
such entities in the Trust Agreement, which opinion of counsel shall not be an
expense of the Trustee or the Depositor.

     5. That the Purchaser hereby acknowledges that under the terms of the Trust
Agreement (the "Agreement") among Structured Asset Securities Corporation, Wells
Fargo Bank Minnesota, N.A., as Trustee and Aurora Loan Services Inc., as Master
Servicer, dated as of

                                     D-1-1
<PAGE>

November 1, 2001, no transfer of a Residual Certificate shall be permitted to be
made to any person unless the Depositor and the Trustee have received a
certificate from such transferee containing the representations in paragraphs 3,
4 and 5 hereof.

     6. That the Purchaser does not hold REMIC residual securities as nominee to
facilitate the clearance and settlement of such securities through electronic
book-entry changes in accounts of participating organizations (such entity, a
"Book-Entry Nominee").

     7. That the Purchaser does not have the intention to impede the assessment
or collection of any federal, state or local taxes legally required to be paid
with respect to such Residual Certificate, and that the Purchaser has provided
financial statements or other financial information requested by the transferor
in connection with the transfer of the Residual Certificate in order to permit
the transferor to assess the financial capability of the Purchaser to pay such
taxes.

     8. That the Purchaser will not transfer a Residual Certificate to any
person or entity (i) as to which the Purchaser has actual knowledge that the
requirements set forth in paragraph 3, paragraph 6 or paragraph 10 hereof are
not satisfied or that the Purchaser has reason to believe does not satisfy the
requirements set forth in paragraph 7 hereof, and (ii) without obtaining from
the prospective Purchaser an affidavit substantially in this form and providing
to the Trustee a written statement substantially in the form of Exhibit G to the
Agreement.

     9. That the Purchaser understands that, as the holder of a Residual
Certificate, the Purchaser may incur tax liabilities in excess of any cash flows
generated by the interest and that it intends to pay taxes associated with
holding such Residual Certificate as they become due.

     10. That the Purchaser (i) is a U.S. Person or (ii) is a Non-U.S. Person
that holds a Residual Certificate in connection with the conduct of a trade or
business within the United States and has furnished the transferor and the
Trustee with an effective Internal Revenue Service Form W-8 ECI (Certificate of
Foreign Person's Claim for exception From Withholding on Income Effectively
Connected with the Conduct of a Trade or Business in the United States) or
successor form at the time and in the manner required by the Code. "Non-U.S.
Person" means any person other than (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; (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; (vi) and, to the extent provided in Treasury regulations, certain trusts
in existence prior to August 20, 1996 that are treated as United States persons
prior to such date and elect to continue to be treated as United States persons.

                                     D-1-2
<PAGE>

     11. That the Purchaser agrees to such amendments of the Trust Agreement as
may be required to further effectuate the restrictions on transfer of any
Residual Certificate to such a "disqualified organization," an agent thereof, a
Book-Entry Nominee, or a person that does not satisfy the requirements of
paragraph 7 and paragraph 10 hereof.

     12. That the Purchaser consents to the designation of the Trustee as its
agent to act as "tax matters person" of the Trust Fund pursuant to the Trust
Agreement.

                                     D-1-3

<PAGE>

     IN WITNESS WHEREOF, the Purchaser has caused this instrument to be executed
on its behalf, pursuant to authority of its Board of Directors, by its [title of
officer] this _____ day of __________, 20__.

                                    --------------------------------------
                                        [name of Purchaser]

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

     Personally appeared before me the above-named [name of officer]
________________, known or proved to me to be the same person who executed the
foregoing instrument and to be the [title of officer] _________________ of the
Purchaser, and acknowledged to me that he [she] executed the same as his [her]
free act and deed and the free act and deed of the Purchaser.

     Subscribed and sworn before me this _____ day of __________, 20__.

NOTARY PUBLIC

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

COUNTY OF_____________________

STATE OF_______________________

My commission expires the _____ day of __________, 20__.

                                     D-1-4

<PAGE>

                                   EXHIBIT D-2
                                   -----------

          FORM OF RESIDUAL CERTIFICATE TRANSFER AFFIDAVIT (TRANSFEROR)

                                               ---------------------------------
                                                         Date

     Re:  Structured Asset Securities Corporation
          Mortgage Pass-Through Certificates
          Series 2001-17
          ---------------------------------------

     _______________________ (the "Transferor") has reviewed the attached
affidavit of _____________________________ (the "Transferee"), and has no actual
knowledge that such affidavit is not true and has no reason to believe that the
information contained in paragraph 7 thereof is not true, and has no reason to
believe that the Transferee has the intention to impede the assessment or
collection of any federal, state or local taxes legally required to be paid with
respect to a Residual Certificate. In addition, the Transferor has conducted a
reasonable investigation at the time of the transfer and found that the
Transferee had historically paid its debts as they came due and found no
significant evidence to indicate that the Transferee will not continue to pay
its debts as they become due.

                                     Very truly yours,

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

                                     D-2-1
<PAGE>

                                    EXHIBIT E
                                    ---------

                              SERVICING AGREEMENTS

                             [See Tabs # through #]

                                       E-1

<PAGE>

                                    EXHIBIT F
                                    ---------

                     FORM OF RULE 144A TRANSFER CERTIFICATE

     Re:  Structured Asset Securities Corporation
          Mortgage Pass-Through Certificates
          Series 2001-17
          ---------------------------------------

     Reference is hereby made to the Trust Agreement dated as of November 1,
2001 (the "Trust Agreement") among Structured Asset Securities Corporation, as
Depositor, Wells Fargo Bank Minnesota, N.A., as Trustee and Aurora Loan Services
Inc., as Master Servicer. Capitalized terms used but not defined herein shall
have the meanings given to them in the Trust Agreement.

     This letter relates to $_________ initial Certificate Principal Amount of
Class--Certificates which are held in the form of Definitive Certificates
registered in the name of _________ (the "Transferor"). The Transferor has
requested a transfer of such Definitive Certificates for Definitive Certificates
of such Class registered in the name of [insert name of transferee].

     In connection with such request, and in respect of such Certificates, the
Transferor hereby certifies that such Certificates are being transferred in
accordance with (i) the transfer restrictions set forth in the Trust Agreement
and the Certificates and (ii) Rule 144A under the Securities Act to a purchaser
that the Transferor reasonably believes is a "qualified institutional buyer"
within the meaning of Rule 144A purchasing for its own account or for the
account of a "qualified institutional buyer", which purchaser is aware that the
sale to it is being made in reliance upon Rule 144A, in a transaction meeting
the requirements of Rule 144A and in accordance with any applicable securities
laws of any state of the United States or any other applicable jurisdiction.

     This certificate and the statements contained herein are made for your
benefit and the benefit of the Placement Agent and the Depositor.

                                       ----------------------------------------
                                           [Name of Transferor]

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

Dated: __________________, ________

                                      F-1

<PAGE>

                                    EXHIBIT G
                                    ---------

                         FORM OF PURCHASER'S LETTER FOR
                        INSTITUTIONAL ACCREDITED INVESTOR

                                               ---------------------------------
                                                               Date

Dear Sirs:

     In connection with our proposed purchase of $______________ principal
amount of Mortgage Pass-Through Certificates, Series 2001-17 (the "Privately
Offered Certificates") of Structured Asset Securities Corporation (the
"Depositor") which are held in the form of Definitive Certificates, we confirm
that:

(1)  We understand that the Privately Offered Certificates have not been, and
     will not be, registered under the Securities Act of 1933, as amended (the
     "Securities Act"), and may not be sold except as permitted in the following
     sentence. We agree, on our own behalf and on behalf of any accounts for
     which we are acting as hereinafter stated, that if we should sell any
     Privately Offered Certificates within two years of the later of the date of
     original issuance of the Privately Offered Certificates or the last day on
     which such Privately Offered Certificates are owned by the Depositor or any
     affiliate of the Depositor (which includes the Placement Agent) we will do
     so only (A) to the Depositor, (B) to "qualified institutional buyers"
     (within the meaning of Rule 144A under the Securities Act) in accordance
     with Rule 144A under the Securities Act ("QIBs"), (C) pursuant to the
     exemption from registration provided by Rule 144 under the Securities Act,
     or (D) to an institutional "accredited investor" within the meaning of Rule
     501(a)(1), (2), (3) or (7) of Regulation D under the Securities Act that is
     not a QIB (an "Institutional Accredited Investor") which, prior to such
     transfer, delivers to the Trustee under the Trust Agreement dated as of
     November 1, 2001 among the Depositor, Wells Fargo Bank Minnesota, N.A., as
     Trustee (the "Trustee") and Aurora Loan Services Inc., as Master Servicer,
     a signed letter in the form of this letter; and we further agree, in the
     capacities stated above, to provide to any person purchasing any of the
     Privately Offered Certificates from us a notice advising such purchaser
     that resales of the Privately Offered Certificates are restricted as stated
     herein.

(2)  We understand that, in connection with any proposed resale of any Privately
     Offered Certificates to an Institutional Accredited Investor, we will be
     required to furnish to the Trustee and the Depositor a certification from
     such transferee in the form hereof to confirm that the proposed sale is
     being made pursuant to an exemption from, or in a transaction not subject
     to, the registration requirements of the Securities Act. We further
     understand that the Privately Offered Certificates purchased by us will
     bear a legend to the foregoing effect.

                                      G-1
<PAGE>

(3)  We are acquiring the Privately Offered Certificates for investment purposes
     and not with a view to, or for offer or sale in connection with, any
     distribution in violation of the Securities Act. We have such knowledge and
     experience in financial and business matters as to be capable of evaluating
     the merits and risks of our investment in the Privately Offered
     Certificates, and we and any account for which we are acting are each able
     to bear the economic risk of such investment.

(4)  We are an Institutional Accredited Investor and we are acquiring the
     Privately Offered Certificates purchased by us for our own account or for
     one or more accounts (each of which is an Institutional Accredited
     Investor) as to each of which we exercise sole investment discretion.

(5)  We have received such information as we deem necessary in order to make our
     investment decision.

(6)  If we are acquiring ERISA-Restricted Certificates, we understand that in
     accordance with ERISA, the Code and the Exemption, no Plan and no person
     acting on behalf of such a Plan may acquire such Certificate except in
     accordance with Section 3.03(d) of the Trust Agreement.

     Terms used in this letter which are not otherwise defined herein have the
respective meanings assigned thereto in the Trust Agreement.

                                      G-2
<PAGE>

     You and the Depositor are entitled to rely upon this letter and are
irrevocably authorized to produce this letter or a copy hereof to any interested
party in any administrative or legal proceeding or official inquiry with respect
to the matters covered hereby.

                                           Very truly yours,

                                           ----------------------------------
                                              [Purchaser]

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

                                      G-3
<PAGE>

                                    EXHIBIT H
                                    ---------

                       [FORM OF ERISA TRANSFER AFFIDAVIT]

STATE OF NEW YORK         )
                          )  ss.:
COUNTY OF NEW YORK        )

     The undersigned, being first duly sworn, deposes and says as follows:

     1. The undersigned is the ______________________ of (the "Investor"), a
[corporation duly organized] and existing under the laws of __________, on
behalf of which he makes this affidavit.

     2. The Investor either (x) is not, and on ___________ [date of transfer]
will not be, an employee benefit plan subject to Section 406 or Section 407 of
the Employee Retirement Income Security Act of 1974, as amended ("ERISA"), or
Section 4975 of the Internal Revenue Code of 1986, as amended (the "Code"), the
trustee of any such plan or a person acting on behalf of any such plan or
investing the assets of any such plan; (y) if the Certificate has been the
subject of an ERISA-Qualifying Underwriting, is an insurance company that is
purchasing the Certificate with funds contained in an "insurance company general
account" as defined in Section V(e) of Prohibited Transaction Class Exemption
("PTCE") 95-60 and the purchase and holding of the Certificate are covered under
Section I and III of PTCE 95-60; or (z) herewith delivers to the Trustee and
shall deliver to the Depositor an opinion of counsel (a "Benefit Plan Opinion")
satisfactory to the Trustee and the Depositor, and upon which the Trustee and
the Depositor shall be entitled to rely, to the effect that the purchase or
holding of such Certificate by the Investor will not result in the assets of the
Trust Fund being deemed to be plan assets and subject to the prohibited
transaction provisions of ERISA or the Code and will not subject the Trustee or
the Depositor to any obligation in addition to those undertaken by such entities
in the Trust Agreement, which opinion of counsel shall not be an expense of the
Trustee or the Depositor.

     3. The Investor hereby acknowledges that under the terms of the Trust
Agreement (the "Agreement") among Structured Asset Securities Corporation, as
Depositor, Wells Fargo Bank Minnesota, N.A., as Trustee and Aurora Loan Services
Inc., as Master Servicer, dated as of November 1, 2001, no transfer of the
ERISA-Restricted Certificates shall be permitted to be made to any person unless
the Depositor and Trustee have received a certificate from such transferee in
the form hereof.

                                      H-1
<PAGE>

     IN WITNESS WHEREOF, the Investor has caused this instrument to be executed
on its behalf, pursuant to proper authority, by its duly authorized officer,
duly attested, this ____ day of _______________, 20__.

                                      ----------------------------------------
                                         [Investor]

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

ATTEST:

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

STATE OF           )
                   )  ss.:
COUNTY OF          )

     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 Investor, and acknowledged that he executed the
same as his free act and deed and the free act and deed of the Investor.

     Subscribed and sworn before me this _____ day of ___________ 20___.

                                      ----------------------------------
                                      NOTARY PUBLIC

                                      My commission expires the
                                      ____ day of __________, 20__.

                                      H-2
<PAGE>

                                    EXHIBIT I
                                    ---------

                            MONTHLY REMITTANCE ADVICE

                                [Not applicable]

                                      I-1
<PAGE>

                                    EXHIBIT J
                                    ---------

                      MONTHLY ELECTRONIC DATA TRANSMISSION

                                [Not applicable]

                                      J-1

<PAGE>

                                    EXHIBIT K
                                    ---------

                              CUSTODIAL AGREEMENTS

                             [See Tabs # through #]

                                       K-1
<PAGE>

                                    EXHIBIT L
                                    ---------

                               INSURANCE AGREEMENT

                                   [See Tab #]

                                       L-1

<PAGE>

                                    EXHIBIT M
                                    ---------

                      CLASS A4 CERTIFICATE INSURANCE POLICY

                                   [See Tab #]

                                       M-1

<PAGE>

                                  EXHIBIT N-1
                                  -----------

                          FORM OF TRANSFER CERTIFICATE
                  FOR TRANSFER FROM RESTRICTED GLOBAL SECURITY
                         TO REGULATION S GLOBAL SECURITY

                   (Transfers pursuant to (Section) 3.03(h)(B)
                                of the Agreement)
                   -------------------------------------------

          Re:  Structured Asset Securities Corporation Mortgage Loan Trust
               Mortgage Pass-Through Certificates, Series 2001-17

     Reference is hereby made to the Trust Agreement (the "Agreement") among
Structured Asset Securities Corporation, as Depositor, Aurora Loan Services
Inc., as Master Servicer, Wells Fargo Bank Minnesota, N.A., as Trustee, dated as
of November 1, 2001. Capitalized terms used but not defined herein shall have
the meanings given to them in the Agreement.

     This letter relates to U.S. $____________________ aggregate principal
amount of Securities which are held in the form of a Restricted Global Security
with DTC in the name of [name of transferor]_________________________________
(the "Transferor") to effect the transfer of the Securities in exchange for an
equivalent beneficial interest in a Regulation S Global Security.

     In connection with such request, the Transferor does hereby certify that
such transfer has been effected in accordance with the transfer restrictions set
forth in the Agreement and the Securities and in accordance with Rule 904 of
Regulation S, and that:

         a. the offer of the Securities was not made to a person in the United
         States;

         b. at the time the buy order was originated, the transferee was outside
         the United States or the Transferor and any person acting on its behalf
         reasonably believed that the transferee was outside the United States;

         c. no directed selling efforts have been made in contravention of the
         requirements of Rule 903 or 904 of Regulation S, as applicable;

         d. the transaction is not part of a plan or scheme to evade the
         registration requirements of the United States Securities Act of 1933,
         as amended; and

         e. the transferee is not a U.S. person (as defined in Regulation S).

     You are entitled to rely upon this letter and are irrevocably authorized to
produce this letter or a copy hereof to any interested party in any
administrative or legal proceedings or official inquiry with respect to the
matters covered hereby. Terms used in this certificate have the meanings set
forth in Regulation S.

                                      N-1
<PAGE>

                                         ----------------------------------
                                         [Name of Transferor]

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

Date:________________, ___________

                                      N-2
<PAGE>

                                   EXHIBIT N-2
                                   -----------

                    FORM OF TRANSFER CERTIFICATE FOR TRANSFER
                        FROM REGULATION S GLOBAL SECURITY
                          TO RESTRICTED GLOBAL SECURITY
                   (Transfers pursuant to (Section) 3.03(h)(C)
                                of the Agreement)
                   -------------------------------------------

          Re:  Structured Asset Securities Corporation Mortgage Pass-Through
               Certificates, Series 2001-17

     Reference is hereby made to the Trust Agreement (the "Agreement") among
Structured Asset Securities Corporation, as Depositor, Aurora Loan Services
Inc., as Master Servicer, Wells Fargo Bank Minnesota, N.A., as Trustee, dated as
of November 1, 2001. Capitalized terms used but not defined herein shall have
the meanings given to them in the Agreement.

     This letter relates to U.S. $_______________ aggregate principal amount of
Securities which are held in the form of a Regulations S Global Security in the
name of [name of transferor] __________________________________ (the
"Transferor") to effect the transfer of the Securities in exchange for an
equivalent beneficial interest in a Restricted Global Security.

     In connection with such request, and in respect of such Securities, the
Transferor does hereby certify that such Securities are being transferred in
accordance with (i) the transfer restrictions set forth in the Agreement and the
Securities and (ii) Rule 144A under the United States Securities Act of 1933, as
amended, to a transferee that the Transferor reasonably believes is purchasing
the Securities for its own account or an account with respect to which the
transferee exercises sole investment discretion, the transferee and any such
account is a qualified institutional buyer within the meaning of Rule 144A, in a
transaction meeting the requirements of Rule 144A and in accordance with any
applicable securities laws of any state of the United States or any other
jurisdiction.

                                               ---------------------------------
                                               [Name of Transferor]

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

Date: _________________, _______________

                                     N-2-1
<PAGE>

                                    EXHIBIT O

                           SENIOR PRINCIPAL PRIORITIES
              (EXCERPTED FROM SASCO 2001-17 PROSPECTUS SUPPLEMENT)

     (4) to the Senior Certificates or Components of any Class of Senior
Certificates of each Certificate Group, other than any related Interest-Only
Certificates or Interest-Only Components, to the extent of the remaining related
Available Distribution Amount for the related Mortgage Pool, as follows:

         (a) to the Group 1 Senior Certificates (other than the Class 1-A3,
     Class 1-A6 and Class 1-AX Certificates) and Component, in reduction of
     their Class Principal Amounts (or Component Principal Amount), from the
     Available Distribution Amount for Pool 1, concurrently, as follows:

            (i) to the Class 1-A1, Class 1-A2 and Class 1-A5 Certificates and
         the A4(1) Component, in an amount up to the Senior Principal
         Distribution Amount for Pool 1, in the following order of priority:

               (A) if the Distribution Date occurs on or after the Distribution
            Date in December 2004, an amount up to approximately $20,992 for
            such Distribution Date to the A4(1) Component, until its Component
            Principal Amount has been reduced to zero;

               (B) concurrently, to the specified classes of Senior Certificates
            and Components for Group 1, as follows:

                  (1) approximately 10.52632% of the remaining Senior Principal
               Distribution Amount for Pool 1, to the Class 1-A2 Certificates,
               until their Class Principal Amount has been reduced to zero; and

                  (2) the remaining Senior Principal Distribution Amount for
               Pool 1, to the Class 1-A1 and Class 1-A5 Certificates and the
               A4(1) Component, in the following order of priority:

                  (a)  to the Class 1-A1 and Class 1-A5 Certificates, until a
                       total of approximately $1,380,000 has been distributed
                       under this clause 4(a)(i)(B)(2)(a) for such Distribution
                       Date, concurrently, as follows:

                       (I)   approximately 80.00% of the amount distributable
                             pursuant to clause 4(a)(i)(B)(2)(a) to the Class
                             1-A1 Certificates, until their Class Principal
                             Amount has been reduced to zero; and

                                      O-1
<PAGE>

                       (II)  approximately 20.00% of the amount distributable
                             pursuant to clause 4(a)(i)(B)(2)(a) to the Class
                             1-A5 Certificates, until their Class Principal
                             Amount has been reduced to zero;

                  (b)  to the Class 1-A5 Certificates, until their Class
                       Principal Amount has been reduced to zero;

                  (c)  to the Class 1-A1 Certificates, until their Class
                       Principal Amount has been reduced to zero;

                  (d)  to the A4(1) Component, until its Component Principal
                       Amount has been reduced to zero; and

            (ii) to the Class 1-AP Certificates, the AP Principal Distribution
         Amount for Pool 1, until their Class Principal Amount has been reduced
         to zero; and

         (b) to the Group 2 Senior Certificates (other than the Class 2-A3,
     Class 2-A6 and Class 2-AX Certificates) and Components (other than the
     2-A5(2), 2-A5(3), 2-A5(4) and 2-A5(7) Components), in reduction of their
     Class Principal Amounts ( or Component Principal Amounts), from the
     Available Distribution Amount for Pool 2, concurrently, as follows:

            (i) to such Senior Certificates and Components for Group 2 (other
         than in respect of the Class 2-A5(6) Component) in an amount up to the
         Senior Principal Distribution Amount for Group 2, concurrently, as
         follows:

                  (1) approximately 0.3616511% of the Senior Principal
               Distribution Amount for Pool 2, to the Class 2-A12 Certificates,
               until their Class Principal Amount as been reduced to zero; and

                  (2) the remaining Senior Principal Distribution Amount for
               Pool 2, to the specified Classes and Components, in the following
               order of priority:

                  (a)  to the Class R Certificate, until its Class Principal
                       Amount has been reduced to zero;

                  (b)  sequentially, to the Class 2-A1 and Class 2-A2
                       Certificates and the 2-A5(1) Component, in that order, up
                       to an amount necessary to reduce the aggregate Class
                       Principal Amounts of such Classes and the Component
                       Principal Amount of such Component, to the applicable PAC
                       Principal Amount for such Distribution Date (as set forth
                       in the PAC Principal Amount Schedule attached as Annex B
                       to this Prospectus Supplement);

                                      O-2
<PAGE>

                  (c)  to the Class 2-A7 and Class 2-A9 Certificates on each
                       Distribution Date on which both such Classes are
                       outstanding, until a total of approximately $500 has been
                       distributed under this clause 4(b)(i)(2)(c) for such
                       Distribution Date, concurrently, as follows:

                       (I)   approximately 84.00% of the amount distributable
                             pursuant to clause 4(b)(i)(2)(c), to the Class 2-A7
                             Certificates, until their Class Principal Amount
                             has been reduced to zero; and

                       (II)  approximately 16.00% of the amount distributable
                             pursuant to clause 4(b )(i)(2)(c), to the Class
                             2-A9 Certificates, until their Class Principal
                             Amount has been reduced to zero;

                  (d)  to the Class 2-A8 and Class 2-A10 Certificates on each
                       Distribution Date on which both such Classes are
                       outstanding, until a total of approximately $500 has been
                       distributed under this clause 4(b)(i)(A)(2)(d) for such
                       Distribution Date, concurrently, as follows:

                       (I)   approximately 55.00% of the amount distributable
                             pursuant to clause 4(b )(i)(2)(d), to the Class
                             2-A8 Certificates, until their Class Principal
                             Amount has been reduced to zero; and

                       (II)  approximately 45.00% of the amount distributable
                             pursuant to clause 4(b )(i)(2)(d), to the Class
                             2-A10 Certificates, until their Class Principal
                             Amount has been reduced to zero;

                  (e)  to the Class 2-A7, Class 2-A8, Class 2-A9 and Class 2-A10
                       Certificates, up to the amount necessary to reduce the
                       Class Principal Amounts thereof to their TAC Principal
                       Amount for such Distribution Date (as set forth in the
                       TAC I Principal Amount Schedule attached in Annex C to
                       this Prospectus Supplement), concurrently, as follows:

                       (I)   concurrently, to the Class 2-A7 and Class 2-A9
                             Certificates, a percentage of the amount
                             distributable pursuant to clause 4(b)(i)(2)(e)
                             equal to a fraction, the numerator of which is the
                             aggregate Class Principal Amount of the Class 2-A7
                             and Class 2-A9 Certificates immediately before the
                             application of clause 4(b)(i)(2)(e), and the
                             denominator of which is the aggregate Class

                                      O-3
<PAGE>

                             Principal Amount of the Class 2-A7, Class 2-A8,
                             Class 2-A9 and Class 2-A10 Certificates immediately
                             before the application of clause 4(b)(i)(2)(e), as
                             follows:

                             (1)  to the Class 2-A7 and Class 2 A9 Certificates
                                  on each Distribution Date on which both such
                                  Classes are outstanding, up to the amount
                                  necessary to reduce the aggregate Class
                                  Principal Amounts thereof to their TAC
                                  Principal Amount for such Distribution Date
                                  (as set forth in the TAC V Principal Amount
                                  Schedule attached in Annex C to this
                                  Prospectus Supplement), concurrently, as
                                  follows:

                                  (A) approximately 84.00% of the amount
                                      distributable pursuant to clause
                                      4(b)(i)(2)(e)(I), to the Class 2-A7
                                      Certificates, until-their Class Principal
                                      Amount has been reduced to zero; and

                                  (B) approximately 16.00% of the amount
                                      distributable pursuant to clause
                                      4(b)(i)(2)(e)(I), to the Class 2-A9
                                      Certificates, until their Class Principal
                                      Amount has been reduced to zero;

                             (2)  to the Class 2-A9 Certificates, up to the
                                  amount necessary to reduce the Class Principal
                                  Amount thereof to their TAC Principal Amount
                                  for such Distribution Date (as set forth in
                                  the TAC VI Principal Amount Schedule attached
                                  in Annex C to this Prospectus Supplement),
                                  until their Class Principal Amount has been
                                  reduced to zero;

                             (3)  to the Class 2-A7 and Class 2-A9 Certificates
                                  on each Distribution Date on which both such
                                  Classes are outstanding, without regard to
                                  their TAC Principal Amount Schedule (as set
                                  forth in the TAC V Principal Amount Schedule
                                  attached in

                                      O-4
<PAGE>

                                  Annex C to this Prospectus Supplement),
                                  concurrently, ad follows:

                                  (A) approximately 52.00% of the amount
                                      distributable pursuant to clause
                                      4(b)(i)(2)(e)(I)(3), to the Class 2-A7
                                      Certificates, until their Class Principal
                                      Amount has been reduced to zero; and

                                  (B) approximately 48.00% of the amount
                                      distributable pursuant to clause
                                      4(b)(i)(2)(e)(I)(3), to the Class 2-A9
                                      Certificates, until their Class Principal
                                      Amount has been reduced to zero; I

                             (4)  to the Class 2-A9 Certificates, until their
                                  Class Principal Amount has been reduced to
                                  zero; and

                             (5)  to the Class 2-A7, Certificates, until their
                                  Class Principal Amount has been reduced to
                                  zero;

                       (II)  concurrently, to the Class 2-A8 and Class 2-A10
                             Certificates, a percentage of the amount
                             distributable pursuant to clause 4(b)(i)(2)(e)
                             equal to a fraction, the numerator of which is the
                             aggregate Class Principal Amount of the Class 2-A8
                             and Class 2-A10 Certificates immediately before the
                             application of clause 4(b)(i)(2)(e), and the
                             denominator of which is the aggregate Class
                             Principal Amount of the Class 2-7, Class 2-A8,
                             Class 2-A9 and Class 2-A10 Certificates immediately
                             before the application of clause 4(b)(i)(2)(e), as
                             follows:

                             (1)  to the Class 2-A8 and Class 2-A10 Certificates
                                  on each Distribution Date on which both such
                                  Classes are outstanding, up to the amount
                                  necessary to reduce the aggregate Class
                                  Principal Amounts thereof to their TAC
                                  Principal Amount for such Distribution Date
                                  (as set forth in the TAC VII Principal Amount
                                  Schedule attached in

                                      O-5
<PAGE>

                                  Annex C to this Prospectus Supplement),
                                  concurrently, as follows:

                                  (A) approximately 55.00% of the amount
                                      distributable pursuant to clause
                                      4(b)(i)(2)(e)(II), to the Class 2-A8
                                      Certificates, until their Class Principal
                                      Amount has been reduced to zero; and

                                  (B) approximately 45.00% of the amount
                                      distributable pursuant to clause
                                      4(b)(i)(2)(e)(II), to the Class 2-A10
                                      Certificates, until their Class Principal
                                      Amount has been reduced to zero;

                             (2)  to the Class 2-A10 Certificates, up to the
                                  amount necessary to reduce the Class Principal
                                  Amount thereof to their TAC Principal Amount
                                  for such Distribution Date (as set forth in
                                  the TAC VIII Principal Amount Schedule
                                  attached in Annex C to this Prospectus
                                  Supplement), until their Class Principal
                                  Amount has been reduced to zero;

                             (3)  to the Class 2-A8 and Class 2-A10 Certificates
                                  on each Distribution Date on which both such
                                  Classes are outstanding, concurrently, as
                                  follows:

                                  (A) approximately 52.00% of the amount
                                      distributable pursuant to clause
                                      4(b)(i)(2)(e)(II)(3), to the Class 2-A8
                                      Certificates, until their Class Principal
                                      Amount has been reduced to zero; and

                                  (B) approximately 48.00% of the amount
                                      distributable pursuant to clause
                                      4(b)(i)(2)(e)(II)(3), to the Class 2-A10
                                      Certificates, until their Class Principal
                                      Amount has been reduced to zero;

                                      O-6
<PAGE>

                             (4)  to the Class 2-A10 Certificates, until their
                                  Class Principal Amount has been reduced to
                                  zero; and

                             (5)  to the Class 2-A8 Certificates, until their
                                  Class Principal Amount has been reduced to
                                  zero;

                  (f)  to the 2-A5(5) Component, up to the amount necessary to
                       reduce the Component Principal Amount of such Component
                       to its TAC Principal Amount for such Distribution Date
                       (as set forth in the TAC II Principal Amount Schedule
                       attached in Annex C to this Prospectus Supplement), until
                       the Component Principal Amount thereof has been reduced
                       to zero;

                  (g)  to the Class 2-A11 Certificates until their Class
                       Principal Amount has been reduced to zero;

                  (h)  to the Class 2-A7, Class 2-A8, Class 2-A9 and Class 2-A10
                       Certificates, in the same manner and priority as set
                       forth in clause (e) above; except that, the reference to
                       the TAC I Principal Amount Schedule in such clause shall
                       instead be to the TAC III Principal Amount Schedule;

                  (i)  to the 2-A5(5) Component, up to the amount necessary to
                       reduce the Component Principal Amount of such Component
                       to its TAC Principal Amount for such Distribution Date
                       (as set forth in the TAC IV Principal Amount Schedule
                       attached in Annex C to this Prospectus Supplement), until
                       the Component Principal Amount thereof has been reduced
                       to zero;

                  (j)  to the Class 2-A7, Class 2-A8, Class 2-A9 and Class 2-A10
                       Certificates, until their Class Principal Amounts ( or
                       Component Principal Amounts) have been reduced to zero,
                       in the same manner and priority as set forth in clause
                       (e) above; except that, amounts distributable shall not
                       be limited by application of the TAC I Principal Amount
                       Schedule; and

                  (k)  to the 2-A5(5) Component, without regard to its TAC
                       Principal Amount Schedule, until its Component Principal
                       Amount has been reduced to zero; and

                  (1)  sequentially, to the Class 2-Al and Class 2-A2
                       Certificates and the 2-A5(1) Component, in that order,
                       without regard to their PAC Principal Amount Schedule,
                       until their Class

                                      O-7
<PAGE>

                       Principal Amount (or Component Principal Amount) have
                       been reduced to zero; and

            (ii) to the 2-A5(6) Component, the AP Principal Distribution Amount
         for Poo12, until the Class Principal Amount thereof has been reduced to
         zero;

         (c) to the Group 3 Senior Certificates (other than the Class 3-AX
     Certificates) and Component, in reduction of their respective Class
     Principal Amounts (or Component Principal Amount), from the Available
     Distribution Amount for Pool 3, concurrently, as follows:

            (i) to the Class 3-Al, Class 3-A2, Class 3-A3 and Class 3-A5
         Certificates and the A4(3) Component, in an amount up to the Senior
         Principal Distribution Amount for Pool 3, in the following order of
         priority:

               (1) if the Distribution Date occurs on or after the Distribution
            Date in December 2004, concurrently, (A) an amount up to
            approximately $7,732 for such Distribution Date to the A4(3)
            Component, until its Component Principal Amount has been reduced to
            zero and (B) an amount up to approximately $96 for such Distribution
            Date to the Class 3-A5 Certificates, until their Class Principal
            Amount has been reduced to zero;

               (2) to the Class 3-A3 Certificates, the lesser of (i) the Class
            3-A3 Priority Amount (as defined herein) for such Distribution Date
            and (ii) approximately 98.60% of the Senior Principal Distribution
            Amount for Pool 3, until its Class Principal Amount has been reduced
            to zero;

               (3) sequentially, to the Class 3-Al and Class 3-A2 Certificates,
            in that order, until their Class Principal Amounts have been reduced
            to zero;

               (4) pro rata, to the A4(3) Component and the Class 3-A5
            Certificates, until their Component Principal Amount (or Class
            Principal Amount) has been reduced to zero; and

               (5) to the Class 3-A3 Certificates, until their Class Principal
            Amount has been reduced to zero; and

            (ii) to the Class 3-AP Certificates, the AP Principal Distribution
         Amount for Pool until its Class Principal Amount has been reduced to
         zero; and

         (d) to the Group 4 Senior Certificates (other than the Class 4-A5,
     Class 4-A6 and Class 4-AX Certificates) and Component, in reduction of
     their respective Class Principal Amounts (or Component Principal Amount),
     from the Available Distribution Amount for Pool 4, concurrently, as
     follows:

            (i) to the Class 4-Al, Class 4-A2, Class 4-A3 and Class 4-A7
         Certificates and the A4(4) Component, in an amount up to the Senior
         Principal Distribution Amount for Pool 4, in the following order of
         priority:

                                      O-8

<PAGE>

               (1) if the Distribution Date occurs on or after the Distribution
            Date in December 2004, an amount up to approximately $2,200 for such
            Distribution Date to the A4(4) Component, until its Component
            Principal Amount has been reduced to zero;

               (2) to the Class 4-A7 Certificates, the lesser of (i) the Class
            4-A7 Priority Amount (as defined herein) for such Distribution Date
            and (ii) approximately 98.60% of the Senior Principal Distribution
            Amount for Pool 4, until its Class Principal Amount has been reduced
            to zero;

               (3) to the Class 4-Al Certificates, until their Class Principal
            Amount has been reduced to zero;

               (4) pro rata, to the Class 4-A2 and Class 4-A3 Certificates,
            until their Class Principal Amounts have been reduced to zero;

               (5) sequentially, to the A4(4) Component and the Class 4-A7
            Certificates, in that order, until their Component Principal Amount
            (or Class Principal Amount) has been reduced to zero; and

               (ii) to the Class 4-AP Certificates, the AP Principal
            Distribution Amount for Pool 4, until its Class Principal Amount has
            been reduced to zero; and

                                      O-9
<PAGE>

                                    EXHIBIT P

                           (See Prospectus Supplement)

                                       P-1
<PAGE>

                                   SCHEDULE A
                                   ----------

                               ALL MORTGAGE LOANS

                               (by Mortgage Pool)

              [To be Retained in a Separate Closing Binder Entitled
          "SASCO 2001-17 Mortgage Loan Schedules" at McKee Nelson LLP]

                                      A-1
<PAGE>

                                   SCHEDULE B
                                   ----------

                      MORTGAGE LOANS WITH RETAINED INTEREST

              [To be Retained in a Separate Closing Binder Entitled
          "SASCO 2001-17 Mortgage Loan Schedules" at McKee Nelson LLP]

                                     Sch B-1
<PAGE>

                                  SCHEDULE B-1
                                  ------------

                                 POOL 1 AX LOANS

              [To be Retained in a Separate Closing Binder Entitled
          "SASCO 2001-17 Mortgage Loan Schedules" at McKee Nelson LLP]

                                    Sch B-1-1

<PAGE>

                                  SCHEDULE B-2
                                  ------------

                                 POOL 2 AX LOANS

              [To be Retained in a Separate Closing Binder Entitled
          "SASCO 2001-17 Mortgage Loan Schedules" at McKee Nelson LLP]

                                    Sch B-2-2

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