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POOLING AND SERVICING AGREEMENT

Pooling and Servicing Agreement

POOLING AND SERVICING AGREEMENT
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Title: POOLING AND SERVICING AGREEMENT
Governing Law: New York     Date: 2/24/2006

POOLING AND SERVICING AGREEMENT
, Parties: indymac mbs inc
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                                                                     Exhibit 4.1


                               INDYMAC MBS, INC.,

                                    Depositor

                             [INDYMAC BANK, F.S.B.],

                                Seller and Servicer

                                       and

                             [                     ],

                                     Trustee

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


                          POOLING AND SERVICING AGREEMENT

                                 Dated as of [ ]

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




   [RESIDENTIAL ASSET SECURITIZATION TRUST] [INDYMAC INDX MORTGAGE LOAN TRUST]
                              Series 20__-[A][AR][IP]


                       MORTGAGE PASS-THROUGH CERTIFICATES
                                 Series 20__-[ ]


<PAGE>


                                Table of Contents
                                                                            Page
                                                                           ----


                                    ARTICLE I

                                   DEFINITIONS

SECTION 1.01.   Rules of Construction......................................I-34

                                   ARTICLE II

         CONVEYANCE OF MORTGAGE LOANS; REPRESENTATIONS AND WARRANTIES

SECTION 2.01.   Conveyance of Mortgage Loans...............................II-1
SECTION 2.02.   Acceptance by the Trustee of the Mortgage Loans............II-5
SECTION 2.03.   Representations, Warranties and Covenants of the Seller
               and the Servicer...........................................II-8
SECTION 2.04.   Representations and Warranties of the Depositor as to
               the Mortgage Loans........................................II-10
SECTION 2.05.   Delivery of Opinion of Counsel in Connection with
               Substitutions and Repurchases.............................II-11
SECTION 2.06.   Execution and Delivery of Certificates....................II-11
SECTION 2.07.   REMIC Matters.............................................II-11
SECTION 2.08.   Covenants of the Servicer.................................II-12
SECTION 2.09.   Subsequent Transfers......................................II-12
SECTION 2.10.   Mandatory Prepayment......................................II-16

                                   ARTICLE III

                ADMINISTRATION AND SERVICING OF MORTGAGE LOANS

SECTION 3.01.   Servicer to Service Mortgage Loans........................III-1
SECTION 3.02.   [Reserved]................................................III-2
SECTION 3.03.   Rights of the Depositor and the Trustee in Respect of
               the Servicer..............................................III-2
SECTION 3.04.   [Reserved]................................................III-2
SECTION 3.05.   Trustee to Act as Servicer................................III-2
SECTION 3.06.   Collection of Mortgage Loan Payments; Servicing
               Accounts; Collection Account; Certificate Account;
               Distribution Account; Pre-Funding Accounts; Capitalized
               Interest Accounts.........................................III-2
SECTION 3.07.   Collection of Taxes, Assessments and Similar Items;
               Escrow Accounts...........................................III-8
SECTION 3.08.   Access to Certain Documentation and Information
               Regarding the Mortgage Loans..............................III-9
SECTION 3.09.   Permitted Withdrawals from the Certificate Account, the
               Distribution Account and the Excess Reserve Fund Account..III-9


                                       i
<PAGE>


SECTION 3.10.   Maintenance of Hazard Insurance; Maintenance of Primary
                Insurance Policies.......................................III-11
SECTION 3.11.   Enforcement of Due-On-Sale Clauses; Assumption
               Agreements...............................................III-12
SECTION 3.12.   Realization Upon Defaulted Mortgage Loans; Repurchase of
               Certain Mortgage Loans...................................III-14
SECTION 3.13.   Trustee to Cooperate; Release of Mortgage Files..........III-16
SECTION 3.14.   Documents, Records and Funds in Possession of the
                Servicer to be Held for the Trustee......................III-17
SECTION 3.15.   Servicing Compensation...................................III-18
SECTION 3.16.   Access to Certain Documentation..........................III-18
SECTION 3.17.   Annual Statement as to Compliance........................III-18
SECTION 3.18.   [Reserved]...............................................III-19
SECTION 3.19.   Errors and Omissions Insurance; Fidelity Bonds...........III-19
SECTION 3.20.   Notification of Adjustments..............................III-19
SECTION 3.21.   Covenants and Representations of the Servicer Regarding
               Prepayment Charges.......................................III-20

                                   ARTICLE IV

                   DISTRIBUTIONS AND ADVANCES BY THE SERVICER

SECTION 4.01.   Advances...................................................IV-1
SECTION 4.02.   Priorities of Distribution.................................IV-2
SECTION 4.03.   Monthly Statements to Certificateholders...................IV-4
SECTION 4.04.   [Reserved].................................................IV-5
SECTION 4.05.   [Reserved].................................................IV-5
SECTION 4.06.   [Reserved].................................................IV-5
SECTION 4.07.   Certain Matters Relating to the Determination of LIBOR.....IV-5

                                    ARTICLE V

                                THE CERTIFICATES

SECTION 5.01.   The Certificates............................................V-1
SECTION 5.02.   Certificate Register; Registration of Transfer and
               Exchange of Certificates....................................V-1
SECTION 5.03.   Mutilated, Destroyed, Lost or Stolen Certificates...........V-6
SECTION 5.04.   Persons Deemed Owners.......................................V-6
SECTION 5.05.   Access to List of Certificateholders' Names and
               Addresses...................................................V-6
SECTION 5.06.   Maintenance of Office or Agency.............................V-7

                                   ARTICLE VI

                         THE DEPOSITOR AND THE SERVICER

SECTION 6.01.   Respective Liabilities of the Depositor and the Servicer...VI-1
SECTION 6.02.   Merger or Consolidation of the Depositor or the Servicer...VI-1


                                       ii
<PAGE>


SECTION 6.03.   Limitation on Liability of the Depositor, the Seller,
               the Servicer and Others....................................VI-1
SECTION 6.04.   Limitation on Resignation of the Servicer..................VI-2
SECTION 6.05.   Inspection.................................................VI-2

                                   ARTICLE VII

                                     DEFAULT

SECTION 7.01.   Events of Default.........................................VII-1
SECTION 7.02.   Trustee to Act; Appointment of Successor..................VII-3
SECTION 7.03.   Notification to Certificateholders........................VII-4

                                  ARTICLE VIII

                              Concerning the Trustee

SECTION 8.01.   Duties of the Trustee....................................VIII-1
SECTION 8.02.   Certain Matters Affecting the Trustee....................VIII-2
SECTION 8.03.   Trustee Not Liable for Certificates or Mortgage Loans....VIII-3
SECTION 8.04.   Trustee May Own Certificates.............................VIII-3
SECTION 8.05.   Trustee's Fees and Expenses..............................VIII-4
SECTION 8.06.   Eligibility Requirements for the Trustee.................VIII-4
SECTION 8.07.   Resignation and Removal of the Trustee...................VIII-5
SECTION 8.08.   Successor Trustee........................................VIII-6
SECTION 8.09.   Merger or Consolidation of the Trustee...................VIII-6
SECTION 8.10.   Appointment of Co-Trustee or Separate Trustee............VIII-7
SECTION 8.11.   Tax Matters..............................................VIII-8
SECTION 8.12.   Periodic Filings........................................VIII-11

                                    ARTICLE IX

                                   Termination

SECTION 9.01.   Termination upon Liquidation or Purchase of the Mortgage
               Loans......................................................IX-1
SECTION 9.02.   Final Distribution on the Certificates.....................IX-2
SECTION 9.03.   Additional Termination Requirements........................IX-3

                                    ARTICLE X

                            Miscellaneous Provisions

SECTION 10.01. Amendment...................................................X-1
SECTION 10.02. Recordation of Agreement; Counterparts......................X-3
SECTION 10.03. Governing Law...............................................X-3
SECTION 10.04. Intention of Parties........................................X-3
SECTION 10.05. Notices.....................................................X-4
SECTION 10.06. Severability of Provisions..................................X-5


                                      iii
<PAGE>


SECTION 10.07. Assignment..................................................X-5
SECTION 10.08. Limitation on Rights of Certificateholders..................X-5
SECTION 10.09. Inspection and Audit Rights.................................X-6
SECTION 10.10. Certificates Nonassessable and Fully Paid...................X-6
SECTION 10.11. Official Record.............................................X-6
SECTION 10.12. Protection of Assets........................................X-6
SECTION 10.13. Qualifying Special Purpose Entity...........................X-7

                                   ARTICLE XI

                             EXCHANGE ACT REPORTING

SECTION 11.01. Filing Obligations.........................................XI-1
SECTION 11.02. Form 10-D Filings..........................................XI-1
SECTION 11.03. Form 8-K Filings...........................................XI-2
SECTION 11.04. Form 10-K Filings..........................................XI-2
SECTION 11.05. Sarbanes-Oxley Certification...............................XI-3
SECTION 11.06. Form 15 Filing.............................................XI-3
SECTION 11.07. Report on Assessment of Compliance and Attestation.........XI-3
SECTION 11.08. Use of Subcontractors......................................XI-5
SECTION 11.09. Amendments.................................................XI-5


                                       iv
<PAGE>



                                    SCHEDULES

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

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

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

Schedule IV:    Planned Balanced Schedules................................S-IV-1

                                     EXHIBITS

Exhibit A:      Form of Class A, M and B Certificate.........................A-1

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

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

Exhibit D:      Form of Class X Certificate..................................D-1

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

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

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

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

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

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

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

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

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

Exhibit N:      Form of Request for Release (Mortgage Loan Paid in Full,
               Repurchased and Released)....................................N-1

Exhibit O:      Form of Subsequent Transfer Agreement........................O-1


                                       v
<PAGE>


            THIS POOLING AND SERVICING AGREEMENT, dated as of [            ],
among INDYMAC MBS, INC., a Delaware corporation, as depositor (the "Depositor"),
[INDYMAC BANK, F.S.B.] ("[IndyMac]"), a federal savings bank, as seller (in such
capacity, the "Seller") and as servicer (in such capacity, the "Servicer"), and
[ ], a banking corporation organized under the laws of the State of [ ], as
trustee (the "Trustee"),

                                  WITNESSETH THAT

            In consideration of the mutual agreements herein contained, the
parties hereto agree as follows:

                              PRELIMINARY STATEMENT

      The Trustee shall elect that the Trust Fund be treated for federal income
tax purposes as comprising two REMICs (each a "REMIC" or, in the alternative,
the Lower Tier REMIC and the Upper Tier REMIC, respectively). Each Certificate,
other than the Class R Certificate, represents ownership of a regular interest
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 each
of the Lower Tier REMIC and the Upper Tier REMIC for purposes of the REMIC
Provisions. The Startup Day for each REMIC described herein is the Closing Date.
The latest possible maturity date for each Certificate is the latest date
referenced in Section 9.01. The Upper Tier REMIC shall hold as assets the
several classes of uncertificated Lower Tier Regular Interests, set out below.
Each such Lower Tier Regular Interest is hereby designated as a regular interest
in the Lower Tier REMIC.

     Lower Tier Class         Lower Tier       Initial Lower Tier
        Designation          Interest Rate      Principal Amount
     ----------------        -------------     ------------------

         Class LT-C               (1)            $
         Class LT-AF-1            (1)
         Class LT-MF-1            (1)
         Class LT-MF-2            (1)
         Class LT-BF              (1)
         Class LT-D               (2)
         Class LT-AV-1            (2)
         Class LT-MV-1            (2)
         Class LT-MV-2            (2)
         Class LT-BV              (2)
         Class LT-E               (1)
         Class LT-R               (3)                      (3)


(1)    The interest rate with respect to any Distribution Date for these
      interests is a per annum variable rate equal to the Group 1 WAC Cap.

(2)    The interest rate with respect to any Distribution Date for these
      interests is a per annum variable rate equal to the Group 2 WAC Cap.


                                       1
<PAGE>


(3)    The Class LT-R Interest is the sole class of residual interest in the
      Lower Tier REMIC and it does not have a principal amount or an interest
      rate.

      The Lower Tier REMIC shall hold as assets all of the assets included in
the Trust Fund other than the Group 1 Pre-Funding Account, the Group 2
Pre-Funding Account, the Group 1 Capitalized Interest Account, the Group 2
Capitalized Interest Account, the Excess Reserve Fund Account, and the Lower
Tier Regular Interests.

      With respect to any Distribution Date, interest that accrues on the Class
LT-C Interest at the Pass-Through Rate shown above shall be deferred and added
to the principal balance of the Class LT-C Interest in an amount equal to [50]%
of any increase in the Subordinated Amount for the Group 1Certificates for such
Distribution Date.

      With respect to any Distribution Date, Available Funds with respect to the
Mortgage Loans in Loan Group 1 shall be applied to pay interest that accrues on
the Class LT-AF-1, Class LT-MF-1, Class LT-MF-2, Class LT-BF-1, Class LT-E, and
Class LT-C Interests at the Pass-Through Rates shown above, other than the
interest deferred on the Class LT-C Interest in the manner described in the
preceding paragraph.

      With respect to any Distribution Date, interest that accrues on the Class
LT-D Interest at the Pass-Through Rate shown above will be deferred and added to
the principal balance of the Class LT-D Interest in an amount equal to [50]% of
any increase in the Subordinated Amount for the Group 2 Certificates for such
Distribution Date.

      With respect to any Distribution Date, Available Funds with respect to the
Mortgage Loans in Loan Group 2 shall be applied to pay interest that accrues on
the Class LT-AV-1, Class LT-MV-1, Class LT-MV-2, Class LT-BV-1, and Class LT-D
Interests at the Pass-Through Rates shown above, other than the interest
deferred on the Class LT-D Interest in the manner described in the preceding
paragraph.

      With respect to any Distribution Date, Available Funds with respect to
Mortgage Loans in Loan Group 1 not applied to pay interest shall be first
distributed on the Class LT-E interest until its balance is reduced to zero, and
then, shall be distributed to, and losses shall be allocated among, the Class
LT-AF-1, Class LT-MF-1, Class LT-MF-2, Class LT-BF and Class LT-C Interests in a
manner such that, immediately following such Distribution Date, the principal
balance of each of the Class LT-AF-1, Class LT-MF-1, Class LT-MF-2, and Class
LT-BF Interests equals [50]% of its Corresponding Class of Upper Tier REMIC
Regular Interest.

      With respect to any Distribution Date, Available Funds with respect to
Mortgage Loans in Loan Group 2 not applied to pay interest shall be distributed
to, and losses shall be allocated among, the Class LT-AV-1, Class LT-MV-1, Class
LT-MV-2, Class LT-BV, and Class LT-D Interests in a manner such that,
immediately following such Distribution Date, the principal balance of each of
the Class LT-AV-1, Class LT-MV-1, Class LT-MV-2, and Class LT-BV Interests
equals [50]% of its Corresponding Class of Upper Tier REMIC Regular Interest.

      The Upper Tier REMIC shall issue the following classes of interests and
each Upper Tier Interest, other than the Class UT-R Interest, is hereby
designated as a regular interest in the Upper Tier REMIC.


                                       2
<PAGE>


                                            Initial Upper
    Upper Tier Class       Upper Tier        Tier Principal     Corresponding
       Designation        Interest Rate          Amount          Certificate
    ----------------      -------------      --------------      -------------

      Class AF-1              (1)             $                   Class AF-1
      Class MF-1              (1)                                Class MF-1
      Class MF-2              (1)                                Class MF-2
      Class BF                 (1)                                Class BF
      Class AV-1              (2)                                Class AV (7)
      Class MV-1              (2)                                Class MV-1 (7)
      Class MV-2              (2)                                 Class MV-2 (7)
      Class BV                (2)                                Class BV (7)
      Class XF                (3)                     (3)         Class X(5)
      Class XV                (4)                     (4)         Class X(5)
       Class UT-R              (6)                                  Class R


(1)    With respect to any Distribution Date, the rate at which interest is
      payable on these interests will be the lesser of the rate shown above or
      the Group 1 WAC Cap. Following the Optional Termination Date, the stated
      per annum Pass-Through Rates shown above will increase by [ ]% ([ ] basis
      points).

(2)    The Class AV-1, Class MV-1, Class MV-2 and Class BV Interests will bear
      interest during their initial Interest Accrual Period at [ ]%, [ ]%, [ ]%
      and [ ]%, respectively, per annum. The Class AV-1, Class MV-1, Class MV-2
      and Class BV Interests will bear interest during each Interest Accrual
      Period thereafter at a per annum rate equal to the least of (i) LIBOR plus
      [ ]%, [ ]%, [ ]% and [ ]%, respectively, (ii) the Group 2 Maximum Cap, and
      (iii) the Group 2 WAC Cap. Following the Optional Termination Date, the
      Pass-Through Margin for the Class AV-1 Certificates shall be [doubled] and
      the Pass-Through Margin for Group 2 Subordinated Certificates shall
      increase by [1.5] times.

(3)    The Class XF Interest has an initial principal balance of $[ ], but it
      will not accrue interest on such balance but will accrue interest on a
      notional principal balance. As of any Distribution Date, the Class XF
      Interest shall have a notional principal balance equal to the aggregate
      of the principal balances of the Lower Tier Fixed Rate Regular Interests,
       other than the Class LT-E interest, as of the first day of the related
      Interest Accrual Period. With respect to any Interest Accrual Period, the
      Class XF Interest shall bear interest at a rate equal to the excess, if
      any, of the Group 1 WAC Cap over the product of (i) 2 and (ii) the
      Adjusted Lower Tier Fixed Rate WAC. With respect to any Distribution
      Date, interest that so accrues on the notional balance of the Class XF
      Interest shall be deferred in an amount equal to any increase in the
      Subordinated Amount for the Group 1 Certificates on such Distribution
      Date. Such deferred interest shall not itself bear interest.

(4)    The Class XV Interest has an initial principal balance of $[ ], but it
      will not accrue interest on such balance but will accrue interest on a
      notional principal balance. As of any Distribution Date, the Class XV
      Interest shall have a notional principal balance equal to the aggregate of
      the principal balances of the Lower Tier Adjustable Rate Regular Interests
      as of the first day of the related Interest Accrual Period. With respect
      to


                                       3
<PAGE>


      any Interest Accrual Period, the Class XV Interest shall bear interest
      at a rate equal to the excess, if any, of the Group 2 WAC Cap over the
      product of (i) 2 and (ii) the Adjusted Lower Tier Adjustable Rate WAC.
      With respect to any Distribution Date, interest that so accrues on the
      notional balance of the Class XV Interest shall be deferred in an amount
      equal to any increase in the Subordinated Amount for the Group 2
      Certificates on such Distribution Date. Such deferred interest shall not
      itself bear interest.

(5)    The Class XF and the Class XV Interests are non-severable components of
      the Class X Certificate.

(6)    The Class UT-R Interest is the sole class of residual interest in the
      Upper Tier REMIC. The Class UT-R Interest does not have an interest rate.

(7)    Each of these Certificates will represent not only the ownership of the
      Corresponding Class of Upper Tier Regular Interest but also the right to
      receive payments from the Excess Reserve Fund Account in respect of any
      Basis Risk CarryForward Amounts. For federal income tax purposes, the
      Trustee will treat a Certificateholder's right to receive payments from
      the Excess Reserve Fund Account as payments made pursuant to an interest
      rate cap contract written by the Class X Certificateholder.

      The minimum denomination for each Class of Certificates, other than the
Class R and the Class X Certificates, will be $25,000. The Class R and the Class
X Certificates will each represent a 100% Percentage Interest in such class.


                                        4
<PAGE>


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

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

Group 1
  Certificates...................    Class AF-1, Class MF-1, Class MF-2, Class BF
                                    and Class R Certificates.

Group 2
  Certificates...................    Class AV-1, Class MV-1, Class MV-2 and Class
                                    BV Certificates.

Group 1
  Class A Certificates...........    Class AF-1 Certificates.

Group 2
  Class A Certificates...........     Class AV-1 Certificates.

Group 1
  Mezzanine Certificates.........    Class MF-1 and Class
                                    MF-2 Certificates.

Group 2
  Mezzanine Certificates.........    Class MV-1 and Class
                                    MV-2 Certificates.

Group 1
  Subordinated Certificates......    Group 1 Mezzanine Certificates
                                    and Class BF Certificates.

Group 2
  Subordinated Certificates......    Group 2 Mezzanine Certificates
                                    and Class BV Certificates.

Adjustable Rate Certificates.....    Group 2 Certificates.

Fixed Rate Certificates..........    Class AF-1, Class MF-1, Class MF-2 and
                                    Class BF Certificates.

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

ERISA-Restricted
  Certificates...................    Subordinated Certificates, Class R
                                    Certificates and Class X Certificate.

Floating Rate Certificates.......    Adjustable Rate Certificates.


                                       5
<PAGE>


LIBOR Certificates...............    Adjustable Rate Certificates.

Mezzanine Certificates...........    Class MF-1, Class MF-2, Class MV-1 and
                                    Class MV-2 Certificates.

Non-Delay Certificates...........    Adjustable Rate Certificates.

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

Physical Certificates............    Class X and Class R Certificates.

Private Certificates.............    Class X Certificate.

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

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

Residual Certificates............    Class R Certificates.

Subordinated Certificates........    Mezzanine Certificates, Class BF
                                    Certificates and Class BV Certificates.

            References herein to "Class A," "Class M-1," "Class M-2," "Class B,"
"Mezzanine Certificates" and "Subordinated Certificates" are references to
Certificates of either or both Certificate Groups of similar designations, as
the context requires.


                                       6
<PAGE>


                                   ARTICLE I

                                  DEFINITIONS

            Whenever used in this Agreement, the following words and phrases,
unless the context otherwise requires, shall have the following meanings:

            Accrued Certificate Interest Distribution Amount: With respect to
any Distribution Date for each Class of Certificates (other than the Class X
Certificate), the amount of interest accrued during the related Interest Accrual
Period at the applicable Pass-Through Rate on the related Class Certificate
Balance immediately prior to such Distribution Date.

            Additional Designated Information:   As defined in Section [11.02].

            Adjusted Lower Tier Adjustable Rate WAC: With respect to any
Interest Accrual Period, the weighted average of the interest rates on the Lower
Tier Adjustable Rate Regular Interests determined for this purpose by first
subjecting the rate payable on the Class LT-D Interest to a cap of zero and
subjecting the rate payable on each of the Class LT-AV-1, Class LT-MV-1, Class
LT-MV-2, and Class LT-BV Interests to a cap equal to LIBOR plus the Margin that
corresponds to the Pass-Through Margin used in computing the Pass-Through Rate
on the Corresponding Class of Certificates.

            Adjusted Lower Tier Fixed Rate WAC: With respect to any Interest
Accrual Period, the weighted average of the interest rates on the Lower Tier
Fixed Rate Regular Interests determined for this purpose by first subjecting the
rate payable on the Class LT-C Interest to a cap of zero, subjecting the rate
payable on each of the Class LT-AF-1, Class LT-MF-1, Class LT-MF-2, and Class
LT-BF Interests to a cap that corresponds to the Pass-Through Rate payable on
the Corresponding Class of Certificates.

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

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

            Adjustment Date: As to any Mortgage Loan in Loan Group 2, the first
Due Date on which the related Mortgage Rate adjusts as set forth in the related
Mortgage Note and each Due Date thereafter on which the Mortgage Rate adjusts as
set forth in the related Mortgage Note.

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


                                       I-1
<PAGE>


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

            Amount Held for Future Distribution: As to the Certificates in
either Certificate Group on any Distribution Date, the aggregate amount held in
the Certificate Account at the close of business on the related Determination
Date on account of (i) Principal Prepayments and Liquidation Proceeds on the
Mortgage Loans in the related Loan Group received after the end of the related
Remittance Period and (ii) all Scheduled Payments on the Mortgage Loans in the
related Loan Group due after the end of the related Remittance Period.

            Applied Realized Loss Amount: With respect to any Distribution Date,
the amount, if any, by which, (i) with respect to the Group 1 Certificates, the
aggregate Class Certificate Balance of the Group 1 Certificates after
distributions of principal on such Distribution Date exceeds the aggregate
Stated Principal Balance of the Mortgage Loans in Loan Group 1 as of the last
day of the immediately preceding Remittance Period plus the amount in the
related Pre-Funding Account, if any, excluding investment earnings, and (ii)
with respect to the Group 2 Certificates, the aggregate Class Certificate
Balance of the Group 2 Certificates after distributions of principal on such
Distribution Date exceeds the aggregate Stated Principal Balance of the Mortgage
Loans in Loan Group 2 as of the last day of the immediately preceding Remittance
Period plus the amount in the related Pre-Funding Account, if any.

            Available Funds: With respect to any Distribution Date and the
Mortgage Loans in a Loan Group (x) the sum of (i) all scheduled installments of
interest (net of the related Expense Fees) and principal due on the Due Date on
such Mortgage Loans in the related Remittance Period and received prior to the
related Determination Date, together with any Advances in respect thereof; (ii)
all Insurance Proceeds and Liquidation Proceeds during the related Remittance
Period (in each case, net of unreimbursed expenses incurred in connection with a
liquidation or foreclosure and unreimbursed Advances, if any); (iii) all partial
or full prepayments on the Mortgage Loans in such Loan Group received during the
related Remittance Period together with all Compensating Interest thereon; (iv)
the related Unutilized Pre-Funding Amount; (v) the related Capitalized Interest
Requirement and (vi) amounts received with respect to such Distribution Date as
the Substitution Adjustment Amount or purchase price in respect of a Deleted
Mortgage Loan in such Loan Group or a Mortgage Loan repurchased by the Seller or
the Servicer in such Loan Group as of such Distribution Date; reduced by (y) (i)
amounts in reimbursement for Advances previously made with respect to the
Mortgage Loans in such Loan Group and other amounts as to which the Servicer is
entitled to be reimbursed pursuant to the Agreement with respect to such Loan
Group and (ii) the Trustee's Fee allocated to such Loan Group.

            Basic Principal Distribution Amount: With respect to any
Distribution Date and Loan Group, the excess of (i) the related Principal
Remittance Amount for such Distribution Date over (ii) the related Excess
Subordinated Amount, if any, for such Distribution Date.

            Basis Risk CarryForward Amount: With respect to each Class of Group
2 Certificates, as of any Distribution Date, the sum of (A) if on such
Distribution Date the Pass-Through Rate for any Class of Group 2 Certificates is
based upon the Group 2 WAC Cap, the excess of (i) the amount of interest such
Class of Group 2 Certificates would otherwise be


                                       I-2
<PAGE>


entitled to receive on such Distribution Date had such rate been calculated as
the sum of LIBOR and the applicable Pass-Through Margin on such Class of Group 2
Certificates for such Distribution Date, up to the Group 2 Maximum Cap over (ii)
the amount of interest payable on such Class of Group 2 Certificates at the
Group 2 WAC Cap for such Distribution Date and (B) the Basis Risk CarryForward
Amount for such Class of Group 2 Certificates for all previous Distribution
Dates not previously paid, together with interest thereon at a rate equal to the
sum of LIBOR and the applicable Pass-Through Margin for such Class of Group 2
Certificates for such Distribution Date, subject to the Group 2 Maximum Cap.

            Basis Risk Payment: For any Distribution Date, an amount equal to
the sum of (i) any Basis Risk CarryForward Amount and (ii) the Required Reserve
Amount for that date, provided, however, that with respect to any Distribution
Date, the payment cannot exceed the sum of the amounts otherwise distributable
on the Class X Certificates.

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

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

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

            Capitalized Interest Account:   Either of the Group 1 Capitalized
Interest Account or the Group 2 Capitalized Interest Account.

            Capitalized Interest Requirement: With respect to the Distribution
Date in [ ] and [ ] and Loan Group 1, the product of (a) the excess of the
Pre-Funding Amount for Loan Group 1 on the Closing Date over the Principal
Balance of any Subsequent Mortgage Loan transferred to the Trust Fund for Loan
Group 1 during the related Due Period or a prior Due Period that has a Monthly
Payment due during such Due Period and (b) a fraction, the numerator of which is
the weighted average of the Pass-Through Rates on the Group 1 Certificates for
such Distribution Date and the denominator of which is 12. With respect to the
Distribution Date in [ ] and [ ] and Loan Group 2, the product of (a) the excess
of the Pre-Funding Amount for Loan Group 2 on the Closing Date over the
Principal Balance of any Subsequent Mortgage Loan transferred to the Trust Fund
for Loan Group 2 during the related Due Period or a prior Due Period that has a
Monthly Payment due during such Due Period and (b) a fraction, the numerator of
which is the weighted average of the Pass-Through Rates on the Group 2
Certificates for such Distribution Date and the denominator of which is 12.

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

            Certificate Account: The separate Eligible Account or Accounts
created and maintained by the Servicer pursuant to Section 3.06(c) with a
depository institution in the name of the Servicer for the benefit of the
Trustee on behalf of Certificateholders and designated


                                        I-3
<PAGE>


"[IndyMac Bank, F.S.B.], in trust for the registered holders of Home Equity
Mortgage Loan Asset-Backed Certificates, Series SPMD [ ]".

            Certificate Balance: With respect to any Class of Certificates,
other than the Class X Certificate, at any date, the maximum dollar amount of
principal to which the Holder thereof is then entitled hereunder, such amount
being equal to the Denomination thereof minus all distributions of principal
previously made with respect thereto and in the case of any Subordinated
Certificates, reduced by any Applied Realized Loss Amounts applicable to such
Class of Subordinated Certificates. The Class X Certificate has no Certificate
Balance.

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

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

            Certificate Register:   The register maintained pursuant to
Section 5.02.

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

            Certification Party:   As defined in Section [11.05].

            Certifying Person:   As defined in Section [11.05].

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

            Class A Principal Distribution Amount: With respect to each Loan
Group and any Distribution Date, the excess of (i) the aggregate Class
Certificate Balance of the Class A Certificates for the related Certificate
Group immediately prior to such Distribution Date over (ii) the lesser of (A) [
]% for Loan Group 1 and [ ]% for Loan Group 2, of the aggregate Stated Principal
Balance of the Mortgage Loans in the related Loan Group as of the last day of
the related Remittance Period and (B) the Stated Principal Balances of the
Mortgage Loans in the


                                      I-4
<PAGE>


related Loan Group as of the last day of the related Remittance Period minus $[
] with respect to Loan Group 1 and $[ ] with respect to Loan Group 2.

            Class B Principal Distribution Amount: With respect to each Loan
Group and any Distribution Date, the excess of (i) the sum for the related
Certificate Group of (A) the aggregate Class Certificate Balance of the Class A
Certificates (after taking into account distribution of the Class A Principal
Distribution Amount on such Distribution Date), (B) the Class Certificate
Balance of the Class M-1 Certificates (after taking into account distribution of
the Class M-1 Principal Distribution Amount on such Distribution Date), (C) the
Class Certificate Balance of the Class M-2 Certificates (after taking into
account distribution of the Class M-2 Principal Distribution Amount for such
Distribution Date), and (D) the Class Certificate Balance of the Class B
Certificates immediately prior to such Distribution Date over (ii) the lesser of
(A) [ ]% for Loan Group 1 and [ ]% for Loan Group 2, of the aggregate Stated
Principal Balance of the Mortgage Loans in the related Loan Group as of the last
day of the related Remittance Period and (B) the Stated Principal Balances of
the Mortgage Loans in the related Loan Group as of the last day of the related
Remittance Period minus $[ ] with respect to Loan Group 1 and $[ ] with respect
to Loan Group 2, provided, however, that with respect to any Distribution Date
on which the Class Certificate Balances of the related Class A, Class M-1 and
Class M-2 Certificates have been reduced to zero, the Class B Principal
Distribution Amount is the lesser of (x) the Class Certificate Balance of the
Class B Certificates and (y) the related Principal Distribution Amount.

            Class Certificate Balance: With respect to any Class and as to any
date of determination, the aggregate of the Certificate Balances of all
Certificates of such Class as of such date.

            Class M-1 Principal Distribution Amount: With respect to each Loan
Group and any Distribution Date, the excess of (i) the sum for the related
Certificate Group of (A) the aggregate Class Certificate Balance of the Class A
Certificates (after taking into account distribution of the Class A Principal
Distribution Amount on such Distribution Date), and (B) the Class Certificate
Balance of the Class M-1 Certificates immediately prior to such Distribution
Date over (ii) the lesser of (A) [ ]% for Loan Group 1 and [ ]% for Loan Group
2, of the aggregate Stated Principal Balance of the Mortgage Loans in the
related Loan Group as of the last day of the related Remittance Period and (B)
the Stated Principal Balances of the Mortgage Loans in the related Loan Group as
of the last day of the related Remittance Period minus $[ ] with respect to Loan
Group 1 and $[ ] with respect to Loan Group 2.

            Class M-2 Principal Distribution Amount: With respect to each Loan
Group and any Distribution Date, the excess of (i) the sum for the related
Certificate Group of (A) the aggregate Class Certificate Balance of the Class A
Certificates (after taking into account distribution of the Class A Principal
Distribution Amount on such Distribution Date), (B) the Class Certificate
Balance of the Class M-1 Certificates (after taking into account distribution of
the Class M-1 Principal Distribution Amount on such Distribution Date) and (C)
the Class Certificate Balance of the Class M-2 Certificates immediately prior to
such Distribution Date over (ii) the lesser of (A) [ ]% for Loan Group 1 and [
]% for Loan Group 2, of the aggregate Stated Principal Balance of the Mortgage
Loans in the related Loan Group as of


                                      I-5
<PAGE>


the last day of the related Remittance Period and (B) the Stated Principal
Balances of the Mortgage Loans in the related Loan Group as of the last day of
the related Remittance Period minus $[ ] with respect to Loan Group 1 and $[ ]
with respect to Loan Group 2.

            Class X Distributable Amount: On any Distribution Date, the amount
of interest that has accrued on the Class XF and Class XV Regular Interests and
any portion of the principal balance of either the Class XF or Class XV Regular
Interests which is distributable as a Subordination Reduction Amount plus
Prepayment Charges and Servicer Prepayment Charge Payment Amounts, if any.

            Closing Date:   [                      ].

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

            Collateral Value: With respect to any Mortgage Loan, the Collateral
Value of the related Mortgaged Property shall be, other than with respect to
Mortgage Loans the proceeds of which were used for a Refinance Loan, the lesser
of (i) the appraised value determined in an appraisal obtained by the originator
at origination of such Mortgage Loan and (ii) the sales price for such Mortgaged
Property. In the case of Refinance Loans, the Collateral Value of the related
Mortgaged Property is the appraised value thereof determined in an appraisal
obtained at the time of refinancing.

            Collection Account:   As defined in Section 3.06(b).

            Combined Loan-to-Value Ratio: For any Mortgage Loan at any time,
shall be the ratio expressed as a percentage of (i) the sum of (a) the original
principal balance of such Mortgage Loan and (b) the outstanding principal
balance at the date of origination of such Mortgage Loan of any senior mortgage
loan(s), or in the case of any open-ended senior mortgage loan, the maximum
available line of credit with respect to such mortgage loan at origination,
regardless of any lesser amount actually outstanding at the date of origination
of such Mortgage Loan, to (ii) the Collateral Value of such Mortgage Loan.

            Commission:   means The U.S. Securities and Exchange Commission.

            Compensating Interest: For any Distribution Date, the lesser of (i)
any and (ii) 0.125 an amount equal to [ ]% multiplied by one-twelfth multiplied
by the aggregate Stated Principal Balance of the Mortgage Loans as of the first
day of the prior month.

            Coop Shares:   Shares issued by a Cooperative Corporation.

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


                                       I-6
<PAGE>


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

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

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

            Corporate Trust Office:   The designated office of the Trustee in
the State of New York at which at any particular time its corporate trust
business with respect to this Agreement shall be administered, which office
at the date of the execution of this Agreement is located at [Address of
Trustee] (Attn:   [                                       ]), facsimile no.
[               ] and which is the address to which notices to and
correspondence with the Trustee should be directed.

            Corresponding Class: The class of interests in any REMIC created
under this Agreement that correspond to the Class of interests in another such
REMIC or to a Class of Certificates in the manner set out below:

       Lower Tier Class       Upper Tier        Corresponding
         Designation           Interest           Certificate
       ----------------       ----------        -------------

        Class LT-AF-1         Class AF-1         Class AF-1
        Class LT-MF-1         Class MF-1         Class MF-1
        Class LT-MF-2         Class MF-2         Class MF-2
         Class LT-BF           Class BF           Class BF
        Class LT-AV-1         Class AV-1         Class AV-1
        Class LT-MV-1         Class MV-1         Class MV-1
        Class LT-MV-2         Class MV-2         Class MV-2
        Class LT-BV           Class BV           Class BV


            Cut-off Date: For each Initial Mortgage Loan, [          ]; for each
Subsequent Mortgage Loan, [            ].

            Cut-off Date Pool Principal Balance:   For any Cut-off Date, the
aggregate Stated Principal Balance of all Mortgage Loans as of such date.

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

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

            Debt Service Reduction Mortgage Loan: Any Mortgage Loan that became
the subject of a Debt Service Reduction.


                                      I-7
<PAGE>


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

            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 the Mortgage Loan, or any reduction
in the amount of principal to be paid in connection with any Scheduled Payment
that results in a permanent forgiveness of principal, which valuation or
reduction results from an order of such court which is final and non-appealable
in a proceeding under the Bankruptcy Code.

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

            Delay Certificates:   As specified in the Preliminary Statement.

            Delay Delivery Mortgage Loans: (i) The Initial Mortgage Loans
identified on the Mortgage Loan Schedule for which all or a portion of a related
Mortgage File is not delivered to the Trustee on or prior to the Closing Date,
and (ii) all Subsequent Mortgage Loans. The Depositor shall deliver (or cause
delivery of) the Mortgage Files to the Trustee: (A) with respect to at least [
]% of the Initial Mortgage Loans, not later than the Closing Date, (B) with
respect to at least [ ]% of the Subsequent Mortgage Loans conveyed on a
Subsequent Transfer Date, not later than [twenty one] days after such Subsequent
Transfer Date, and (C) with respect to the remaining [ ]% of the Initial
Mortgage Loans, not later than [five] Business Days after the Closing Date, and
not later than [thirty] days after the relevant Subsequent Transfer Date with
respect to the remaining [ ]% of the Subsequent Mortgage Loans conveyed on the
related Subsequent Transfer Date. To the extent that the Seller shall be in
possession of any Mortgage Files with respect to any Delay Delivery Loan, until
delivery to of such Mortgage File to the Trustee as provided in Section 2.01,
the Seller shall hold such files as Servicer hereunder, as agent and in trust
for the Trustee.

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

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

            Denomination: With respect to each Certificate, the amount set forth
on the face thereof as the "Initial Certificate Balance of this Certificate" or
the Percentage Interest appearing on the face thereof.

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


                                      I-8
<PAGE>


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

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

            Determination Date: As to any Distribution Date, the [18]th day of
each month or if such [18]th day is not a Business Day the next succeeding
Business Day; provided, however, that if such next succeeding Business Day is
less than [two] Business Days prior to the related Distribution Date, then the
Determination Date shall be the next Business Day preceding the [18]th day of
such month.

            Distribution Account: The separate Eligible Account created and
maintained by the Trustee pursuant to Section 3.06(e) in the name of the Trustee
for the benefit of the Certificateholders and designated "[ ] in trust for
registered holders of IndyMac Home Equity Mortgage Loan Asset-Backed
Certificates, Series SPMD [ ]." Funds in the Distribution Account shall be held
in trust for the Certificateholders for the uses and purposes set forth in this
Agreement.

            Distribution Account Deposit Date: As to any Distribution Date,
12:30 p.m. Pacific time on the Business Day immediately preceding such
Distribution Date.

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

            Due Date:   With respect to any Mortgage Loan, the day of the
month on which a Scheduled Payment is due which is the [first] day of the
month.

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

            Eligible Account: Any of (i) an account or accounts maintained with
a federal or state chartered depository institution or trust company the
short-term unsecured debt obligations of which (or, in the case of a depository
institution or trust company that is the principal subsidiary of a holding
company, the debt obligations of such holding company, but only if Moody's is
not a Rating Agency) have the highest short-term ratings of each Rating Agency
at the time any amounts are held on deposit therein, or (ii) an account or
accounts in a depository institution or trust company in which such accounts are
insured by the FDIC or the SAIF (to the limits established by the FDIC or the
SAIF) and the uninsured deposits in which accounts are otherwise secured such
that, as evidenced by an Opinion of Counsel delivered to the Trustee and to each
Rating Agency, the Certificateholders have a claim with respect to the funds in
such account or a perfected first priority security interest against any
collateral (which shall be limited to Permitted Investments) securing such funds
that is superior to claims of any other depositors or creditors of the
depository institution or trust company in which such account is maintained,


                                      I-9
<PAGE>


or (iii) a trust account or accounts maintained with the trust department of a
federal or state chartered depository institution or trust company, acting in
its fiduciary capacity or (iv) any other account acceptable to each Rating
Agency without reduction or withdrawal of their then current ratings of the
Certificates as evidenced by a letter from each Rating Agency to the Trustee.
Eligible Accounts may bear interest, and may include, if otherwise qualified
under this definition, accounts maintained with the Trustee.

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

            ERISA-Qualifying Underwriting:   A best efforts or firm commitment
underwriting or private placement that meets the requirements of Prohibited
Transaction Exemption 97-34, 62 Fed. Reg. 39021 (1997), as amended (or any
successor thereto), or any substantially similar administrative exemption
granted by the U.S. Department of Labor (an "Underwriter's Exemption").

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

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

            Event of Default:   As defined in Section 7.01.

            Excess Proceeds: With respect to any Liquidated Mortgage Loan, the
amount, if any, by which the sum of any Liquidation Proceeds of such Mortgage
Loan received in the calendar month in which such Mortgage Loan became a
Liquidated Mortgage Loan, net of any amounts previously reimbursed to the
Servicer as Nonrecoverable Advance(s) with respect to such Mortgage Loan
pursuant to Section 3.09(a)(ii), exceeds (i) the unpaid principal balance of
such Liquidated Mortgage Loan as of the Due Date in the month in which such
Mortgage Loan became a Liquidated Mortgage Loan plus (ii) accrued interest at
the Mortgage Rate from the Due Date as to which interest was last paid or
advanced (and not reimbursed) to Certificateholders up to the Due Date
applicable to the Distribution Date immediately following the calendar month
during which such liquidation occurred.

            Excess Reserve Fund Account: The separate Eligible Account created
and maintained by the Trustee pursuant to Section 3.06(d) in the name of the
Trustee for the benefit of the Adjustable Rate Certificateholders and designated
"[ ] in trust for registered holders of IndyMac Home Equity Mortgage Loan
Asset-Backed Trust, Series [ ]." Funds in the Excess Reserve Fund Account shall
be held in trust for the Adjustable Rate Certificateholders for the uses and
purposes set forth in this Agreement.

            Excess Subordinated Amount: With respect to a Certificate Group and
any Distribution Date, the excess, if any, of (a) the related Subordinated
Amount on such Distribution Date over (b) the related Specified Subordinated
Amount for such Distribution Date.

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


                                      I-10
<PAGE>


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

            Expense Fees: As to each Mortgage Loan, the sum of the related
Servicing Fee and Trustee Fee.

            Expense Fee Rate: As to each Mortgage Loan, the sum of the related
Servicing Fee Rate, Trustee Fee Rate and any lender paid mortgage insurance
premiums.

            Extra Principal Distribution Amount: As of any Distribution Date and
either Certificate Group, the lesser of (x) the related Total Monthly Excess
Spread for such Distribution Date and (y) the related Subordination Deficiency
for such Distribution Date.

            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 Payment Date:   The Final Scheduled Payment Date
for each Class of Certificates is as follows:

                                                             Final Scheduled
                                                              Payment Date
                                                        -----------------------

Class AF-1 Certificates.................................    [             ]
Class MF-1 Certificates.................................    [             ]
Class MF-2 Certificates.................................    [             ]
Class BF Certificates...................................    [              ]
Class AV-1 Certificates.................................    [             ]
Class MV-1 Certificates.................................    [             ]
Class MV-2 Certificates.................................    [             ]
Class BV Certificates...................................    [             ]
Class R Certificates                                        [             ]


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

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


                                       I-11
<PAGE>


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

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

            Group 1 Certificates: As specified in the Preliminary Statement.

            Group 1 Capitalized Interest Account: The separate Eligible Account
created and maintained by the Trustee pursuant to Section 3.06 in the name of
the Trustee for the benefit of the Certificateholders and designated "[ ], in
trust for registered holders of IndyMac Home Equity Mortgage Loan Asset-Backed
Certificates, Series SPMD [ ]". Funds in the Group 1 Capitalized Interest
Account shall be held in trust for the Certificateholders for the uses and
purposes set forth in this Agreement and shall not be a part of any REMIC
created hereunder, provided, however that any investment income earned from
Permitted Investments made with funds in the Group 1 Capitalized Interest
Account will be for the account of the Seller.

            Group 1 Pre-Funding Account: The separate Eligible Account created
and maintained by the Trustee pursuant to Section 3.06 in the name of the
Trustee for the benefit of the Certificateholders and designated "[ ], in trust
for registered holders of IndyMac Home Equity Mortgage Loan Asset-Backed
Certificates, Series SPMD [ ]" allocated for the purchase of Subsequent Mortgage
Loans to be included in Loan Group 1. Funds in the Group 1 Pre-Funding Account
shall be held in trust for the Certificateholders for the uses and purposes set
forth in this Agreement and shall not be a part of any REMIC created hereunder.

            Group 1 WAC Cap: With respect to the Mortgage Loans in Loan Group 1
as of any Distribution Date, the weighted average of the Adjusted Net Mortgage
Rates in effect on the beginning of the related Remittance Period for such
Mortgage Loans.

            Group 2 Certificates: As specified in the Preliminary Statement.

            Group 2 Capitalized Interest Account: The separate Eligible Account
created and maintained by the Trustee pursuant to Section 3.06 in the name of
the Trustee for the benefit of the Certificateholders and designated "[ ], in
trust for registered holders of IndyMac Home Equity Mortgage Loan Asset-Backed
Certificates, Series SPMD [ ]". Funds in the Group 2 Capitalized Interest
Account shall be held in trust for the Certificateholders for the uses and
purposes set forth in this Agreement and shall not be a part of any REMIC
created hereunder, provided, however that any investment income earned from
Permitted Investments made with funds in the Group 2 Capitalized Interest
Account will be for the account of the Seller.

            Group 2 Pre-Funding Account: The separate Eligible Account created
and maintained by the Trustee pursuant to Section 3.05 in the name of the
Trustee for the benefit of the Certificateholders and designated "[ ], in trust
for registered holders of


                                      I-12
<PAGE>


IndyMac Home Equity Mortgage Loan Asset-Backed Certificates, Series SPMD
[           ]" allocated for the purchase of Subsequent Mortgage Loans to be
included in Loan Group 2. Funds in the Group 2 Pre-Funding Account shall be held
in trust for the Certificateholders for the uses and purposes set forth in this
Agreement and shall not be a part of any REMIC created hereunder.

            Group 2 Maximum Cap: With respect to the Mortgage Loans in Loan
Group 2 as of any Distribution Date, the weighted average of the Maximum Rates
on the Mortgage Loans in Loan Group 2 less the Expense Fee Rate.

            Group 2 WAC Cap: With respect to the Mortgage Loans in Loan Group 2
as of any Distribution Date, the product of (1) the weighted average of the
Adjusted Net Mortgage Rates then in effect on the beginning of the related
Remittance Period on the Mortgage Loans in Loan Group 2 and (ii) a fraction, the
numerator of which is 30 and the denominator of which is the actual number of
days in the Interest Accrual Period for the Group 2 Certificates related to such
Distribution Date.

            Index: As to each Mortgage Loan in Loan Group 2, the index from time
to time in effect for the adjustment of the Mortgage Rate set forth as such on
the related Mortgage Note.

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

            Initial Mortgage Loan: Such of the mortgage loans transferred and
assigned to the Trustee pursuant to the provisions hereof, as from time to time
are held as a part of the Trust Fund (including any REO Property), the mortgage
loans so held being identified on the Mortgage Loan Schedule as of the Closing
Date, notwithstanding foreclosure or other acquisition of title of the related
Mortgaged Property.

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

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

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

            Interest Accrual Period: With respect to each Class of Delay
Certificates and the Corresponding Class of Lower Tier Regular Interests and any
Distribution Date, the calendar month prior to the month of such Distribution
Date. For purposes of computing accrual of interest on each Class of Delay
Certificates and each Class of Lower Tier Regular Interests, each month is
assumed to have 30 days and each year is assumed to have 360 days. With respect
to each Class of Non-Delay Certificates and the Corresponding Class of Lower
Tier Regular Interests and any Distribution Date, the period commencing on the
[25]th day of the month preceding the month in which such Distribution Date
occurs and ending on the [24]th day of the


                                      I-13
<PAGE>


month in which such Distribution Date occurs (or in the case of the first
Distribution Date, the period from and including the Closing Date to but
excluding such first Distribution Date). For purposes of computing interest
accruals on each Class of Non-Delay Certificates, each Interest Accrual Period
has the actual number of days in such month and each year is assumed to have 360
days.

            Item 1119 Party: The Depositor, any Seller, the Servicer, the
Trustee, any originator identified in the Prospectus Supplement, the Corridor
Contract Counterparty, the Class AF-5B Insurer and any other material
transaction party, as identified in Exhibit S hereto, as updated pursuant to
Section 11.04.

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

            LIBOR: With respect to any Interest Accrual Period for the LIBOR
Certificates, the rate determined by the Trustee on the related LIBOR
Determination Date on the basis of the offered rate for one-month U.S. dollar
deposits as such rate appears on Telerate Page 3750 as of 11:00 a.m. (London
time) on such date; provided that if such rate does not appear on Telerate Page
3750, the rate for such date will be determined on the basis of the rates at
which one-month U.S. dollar deposits are offered by the Reference Banks at
approximately 11:00 a.m. (London time) on such date to prime banks in the London
interbank market. In such event, the Trustee will request the principal London
office of each of the Reference Banks to provide a quotation of its rate. If at
least two such quotations are provided, the rate for that date will be the
arithmetic mean of the quotations (rounded upwards if necessary to the nearest
whole multiple of 1/16%). If fewer than two quotations are provided as
requested, the rate for that date will be the arithmetic mean of the rates
quoted by major banks in New York City, selected by the Servicer, at
approximately 11:00 a.m. (New York City time) on such date for one-month U.S.
dollar loan to leading European banks.

            LIBOR Certificates: As specified in the Preliminary Statement.

            LIBOR Determination Date: With respect to any Interest Accrual
Period (other than the initial Interest Accrual Period) for the LIBOR
Certificates, the [second] London Business Day preceding the commencement of
such Interest Accrual Period.

            Limited Exchange Act Reporting Obligations: The obligations of the
Servicer under Section 3.17(b), Section 6.02 and Section 6.04 with respect to
notice and information to be provided to the Depositor and Article XI (except
Section 11.07(a)(1) and (2)).

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


                                      I-14
<PAGE>


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

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

            Loan Group 1:   All Mortgage Loans which have Mortgage Rates that
are fixed.

            Loan Group 2:   All Mortgage Loans which have Mortgage Rates that
are adjustable.

            Loan-to-Value Ratio: With respect to any Mortgage Loan and as of any
date of determination, is the fraction, expressed as a percentage, the numerator
of which is the original principal balance of the related Mortgage Loan at such
date of determination and the denominator of which is the Collateral Value of
the related Mortgaged Property.

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

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

            Lower Tier Adjustable Rate Regular Interest: Each of the Class
LT-AV-1, Class LT-MV-1, Class LT-MV-2, and Class BV Interests as described in
the Preliminary Statement.

            Lower Tier Fixed Rate Regular Interest: Each of the Class LT-AF-1,
Class LT-MF-1, Class LT-MF-2, and Class LT-BF Interests as described in the
Preliminary Statement.

            Lower Tier Regular Interests:   Each of the Lower Tier Adjustable
Rate Regular Interests and the Lower Tier Fixed Rate Regular Interests.

            Lower Tier REMIC:   As described in the Preliminary Statement

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

            Majority in Interest: As to any Class of Regular Certificates, the
Holders of Certificates of such Class evidencing, in the aggregate, at least
[51]% of the Percentage Interests evidenced by all Certificates of such Class.

            Margin: As to each Mortgage Loan, the percentage amount set forth on
the related Mortgage Note added to the Index in calculating the Mortgage Rate
thereon.

            Master REMIC: As defined in the Preliminary Statement.


                                      I-15
<PAGE>


            Maximum Rate: As to any Mortgage Loans in Loan Group 2, the maximum
rate set forth on the related Mortgage Note at which interest can accrue on such
Mortgage Loan.

            Modified Mortgage Loan: Any Mortgage Loan which the Servicer has
modified pursuant to Section 3.12(c).

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

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

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

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

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

            Moneyline Telerate Page 3750: The display page currently so
designated on the Moneyline Telerate Information Services, Inc. (or any page
replacing that page on that service for the purpose of displaying London
inter-bank offered rates of major banks).

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

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

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

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

            Mortgage Loans: Such of the mortgage loans transferred and assigned
to the Trustee pursuant either (i) to the provisions hereof or (ii) to the
provisions of a Subsequent Transfer Agreement and to the provisions hereof, as
from time to time are held as a part of the Trust Fund (including any REO
Property), the mortgage loans so held being identified on the Mortgage Loan
Schedule, notwithstanding foreclosure or other acquisition of title of the
related Mortgaged Property.


                                      I-16
<PAGE>


            Mortgage Loan Schedule: As of any date, the list of Mortgage Loans
included in the Trust Fund on such date, separately identifying the Initial
Mortgage Loans and the Subsequent Mortgage Loans (if any), attached hereto as
Schedule I. The Mortgage Loan Schedule shall be prepared by the Seller and shall
set forth the following information with respect to each Mortgage Loan.

            (i) the loan number;

             (ii) the Mortgagor's name and the street address of the Mortgaged
      Property, including the zip code;

            (iii) the maturity date;

            (iv) the original principal balance;

            (v) the Cut-off Date Principal Balance;

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

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

            (viii) the Loan-to-Value Ratio or Combined Loan-to-Value (as
      applicable) at origination;

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

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

            (xi) the Mortgage Rate;

            (xii) the purpose for the Mortgage Loan;

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

            (xiv) with respect to the Mortgage Loans in Loan Group 2:

                  (a) the Maximum Rate;

                  (b) the Periodic Rate Cap;

                   (c) the Adjustment Date;

                  (d) the Margin;

            (xv) a code indicating whether the Mortgage Loan is a Performance
      Loan;


                                      I-17
<PAGE>


            (xvi) the Servicing Fee Rate;

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

            (xviii) with respect to the Lender PMI Loans, the Lender PMI fee
      premium; and

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

Such schedule shall also set forth the total of the amounts described under (v)
above for all of the Mortgage Loans.

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

            Mortgage Rate: The annual rate of interest borne by a Mortgage Note
from time to time.

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

            Mortgagor:   The obligor(s) on a Mortgage Note.

            MR Interest:   As defined in the Preliminary Statement.

            Net Monthly Excess Cashflow: For any Distribution Date the amount
remaining for distribution pursuant to subsection 4.02(iii) (before giving
effect to distributions pursuant to such subsection).

            Net Prepayment Interest Shortfall: For any Distribution Date and any
Loan Group, the amount by which the sum of the Prepayment Interest Shortfalls
with respect to such Loan Group exceeds the sum of the Compensating Interest
payments made on such Distribution Date with respect to such Loan Group.

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

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

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

            Offered Certificates:   As specified in the Preliminary Statement.

            Officer's Certificate: A certificate (i) signed by the Chairman of
the Board, the Vice Chairman of the Board, the President, a Managing Director, a
Vice President (however


                                      I-18
<PAGE>


denominated), an Assistant Vice President, the Treasurer, the Secretary, or one
of the Assistant Treasurers or Assistant Secretaries of the Depositor or the
Servicer, (ii) if provided for in this Agreement, signed by a Servicing Officer,
as the case may be, and delivered to the Depositor and the Trustee, as the case
may be, as required by this Agreement or (iii) in the case of any other Person,
signed by an authorized officer of such Person.

            Opinion of Counsel: A written opinion of counsel, who may be counsel
for the Depositor or the Servicer, including in-house counsel, reasonably
acceptable to the Trustee; provided, however, that with respect to the
interpretation or application of the REMIC Provisions, such counsel must (i) in
fact be independent of the Depositor and the Servicer, (ii) not have any direct
financial interest in the Depositor or the Servicer or in any affiliate of
either, and (iii) not be connected with the Depositor or the Servicer as an
officer, employee, promoter, underwriter, trustee, partner, director or person
performing similar functions.

            Optional Termination: The termination of the Trust Fund created
hereunder in connection with the purchase of the Mortgage Loans pursuant to
Section 9.01(a) hereof.

            Optional Termination Date: The Distribution Date on which the assets
of the Trust Fund decline to [10]% or less of the Cut-off Date Principal
Balances of the Mortgage Loans.

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

            OTS:   The Office of Thrift Supervision.

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

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

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

            Outstanding Mortgage Loan: As of any Due Date, a Mortgage Loan with
a Stated Principal Balance greater than zero which was not the subject of a
Principal Prepayment in Full prior to such Due Date and which did not become a
Liquidated Mortgage Loan prior to such Due Date.

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

            Pass-Through Margin: With respect to each Class of Adjustable Rate
Certificates, the following percentages: Class AV-1 Certificates, [    ]%; Class
MV-1 Certificates, [    ]%; Class MV-2 Certificates, [    ]%; and Class BV
Certificates, [    ]%. Following the Optional Termination Date, the Pass-Through
Margin for the Class AV-1 Certificates shall be [doubled]


                                      I-19
<PAGE>


and the Pass-Through Margin for Group 2 Subordinated Certificates shall increase
by [1.5] times.

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

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

            Performance Certification:   As defined in Section 11.05.

            Performance Loan: Mortgage Loans that provide borrowers the
potential of margin reduction for good payment history. If, at the time of
evaluation, the related borrower has made scheduled payments in full since the
origination of the loan with a maximum of one late payment (which, however,
cannot be in the month of evaluation) the Mortgage Loan is eligible for a
reduction (ranging from [ ]% to [ ]%) in the margin used to calculate the
Mortgage Rate.

            Periodic Rate Cap: As to any Mortgage Loan in Loan Group 2 and any
Adjustment Date, the maximum percentage increase or decrease to the related
Mortgage Rate on any such Adjustment Date, as specified in the related Mortgage
Note.

            Permitted Investments:   At any time, any one or more of the
following obligations and securities:

            (i) obligations of the United States or any agency thereof, provided
      that such obligations are backed by the full faith and credit of the
      United States;

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

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

            (iv) certificates of deposit, demand or time deposits, or bankers'
      acceptances issued by any depository institution or trust company
      incorporated under the laws of the United States or of any state thereof
      and subject to supervision and examination by federal and/or state
      banking authorities, provided that the commercial paper and/or long-term
      unsecured debt obligations of such depository institution or trust
      company (or in the case of the principal depository institution in a
      holding company system, the commercial


                                      I-20
<PAGE>


      paper or long-term unsecured debt obligations of such holding company,
      but only if Moody's is not a Rating Agency) are then rated one of the two
      highest long-term and the highest short-term ratings of each Rating
      Agency for such securities, or such lower ratings as will not result in
      the downgrading or withdrawal of the ratings then assigned to the
      Certificates by the Rating Agencies, as evidenced by a signed writing
      delivered by each Rating Agency;

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

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

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

            (viii) securities (other than stripped bonds, stripped coupons or
      instruments sold at a purchase price in excess of [ ]% of the face amount
      thereof) bearing interest or sold at a discount issued by any corporation
      incorporated under the laws of the United States or any state thereof
      which, at the time of such investment, have one of the two highest ratings
      of each Rating Agency (except if the Rating Agency is Moody's such rating
      shall be the highest commercial paper rating of Moody's for any such
      securities), or such lower rating as will not result in the downgrading or
      withdrawal of the ratings then assigned to the Certificates by the Rating
      Agencies, as evidenced by a signed writing delivered by each Rating
      Agency;

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

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

provided that no such instrument shall be a Permitted Investment if such
instrument evidences the right to receive interest only payments with respect to
the obligations underlying such instrument. Any permitted Investment shall be
relatively risk free and no options or voting rights


                                      I-21
<PAGE>


shall be exercised with respect to any Permitted Investment. No Permitted
Investment may be sold or disposed of before its maturity.

            Permitted Transferee: Any person other than (i) the United States,
any State or political subdivision thereof, or any agency or instrumentality of
any of the foregoing, (ii) a foreign government, International Organization or
any agency or instrumentality of either of the foregoing, (iii) an organization
(except certain farmers' cooperatives described in section 521 of the Code)
which is exempt from tax imposed by Chapter 1 of the Code (including the tax
imposed by section 511 of the Code on unrelated business taxable income) on any
excess inclusions (as defined in section 860E(c)(1) of the Code) with respect to
any Residual Certificate, (iv) rural electric and telephone cooperatives
described in section 1381(a)(2)(C) of the Code, (v) a Person that is not a U.S.
Person, and (vi) any other Person so designated by the Depositor based upon an
Opinion of Counsel that the Transfer of an Ownership Interest in a Residual
Certificate to such Person may cause the REMIC hereunder to fail to qualify as a
REMIC at any time that the Certificates are outstanding. The terms "United
States," "State" and "International Organization" shall have the meanings set
forth in section 7701 of the Code or successor provisions. A corporation will
not be treated as an instrumentality of the United States or of any State or
political subdivision thereof for these purposes if all of its activities are
subject to tax and, with the exception of the Federal Home Loan Mortgage
Corporation, a majority of its board of directors is not selected by such
government unit.

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

            Physical Certificates:   As specified in the Preliminary Statement.

            Pool Stated Principal Balance: As to any Distribution Date, the
aggregate of the Stated Principal Balances of the Mortgage Loans on the last day
of the related Remittance Period which were Outstanding Mortgage Loans on such
day.

            Pre-Funding Amount: With respect to any date, the amount on deposit
in the respective Pre-Funding Accounts as of such date (net of any reinvestment
earnings thereon).

            Pre-Funding Accounts: The separate Eligible Accounts created and
maintained by the Trustee pursuant to Section 3.06 in the name of the Trustee
for the benefit of the Certificateholders and designated "[ ], in trust for
registered holders of IndyMac Home Equity Mortgage Loan Asset-Backed
Certificates, Series SPMD [ ]." Funds in the Pre-Funding Accounts shall be held
in trust for the Certificateholders for the uses and purposes set forth in this
Agreement and shall not be a part of any REMIC created hereunder, provided,
however that any investment income earned from Permitted Investments made with
funds in the Pre-Funding Accounts will be for the account of the Depositor.

            Pre-Funding Period: With respect to each Loan Group, the period
commencing on the Closing Date and ending on the earlier to occur of (i) the
date on which the amount on deposit in the Pre-Funding Accounts (exclusive of
any investment earnings) is less than $[       ] and (ii) [       ].


                                      I-22
<PAGE>


            Prepayment Charge: As to a Mortgage Loan, any charge paid by a
Mortgagor in connection with certain partial prepayments and all prepayments in
full made within the related Prepayment Charge Period, the Prepayment Charges
with respect to each applicable Mortgage Loan so held by the Trust being
identified in the Prepayment Charge Schedule (other than any Servicer Prepayment
Charge Payment Amount).

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

            Prepayment Charge Schedule: As of any date, the list of Prepayment
Charges included in the Trust on such date, (including the prepayment charge
summary attached thereto). The Prepayment Charge Schedule shall set forth the
following information with respect to each prepayment Charge.

            (i) the Mortgage Loan account number;

            (ii) a code indicating the type of Prepayment Charge;

            (iii) the state of origination in which the related Mortgage
      Property is located;

            (iv) the first date on which a Monthly Payment is or was due under
      the related Mortgage Note;

            (v) The term of the Prepayment Charge;

            (vi) the original principal amount of the related Mortgage Loan; and

            (vii) the Cut-off Date Principal Balance of the related mortgage
      Loan.

            The Prepayment Charge Schedule shall be amended from time to time by
the Servicer in accordance with the provisions of this Agreement.

            Prepayment Interest Shortfall: As to any Distribution Date, Mortgage
Loan and Principal Prepayment, the amount, if any, by which one month's interest
at the related Mortgage Rate (net of the related Servicing Fee Rate) on such
Principal Prepayment exceeds the amount of interest paid in connection with such
Principal Prepayment.

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

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

            Principal Distribution Amount: For each Certificate Group on any
Distribution Date, the sum of (i) the Basic Principal Distribution Amount for
such Distribution Date for such


                                      I-23
<PAGE>


Certificate Group and (ii) the Extra Principal Distribution Amount for such
Distribution Date for such Certificate Group.

            Principal Prepayment: Any payment of principal by a Mortgagor on a
Mortgage Loan (including without limitation the Purchase Price of any Modified
Mortgage Loan purchased pursuant to Section 3.12(c)) that is received in advance
of its scheduled Due Date and is not accompanied by an amount representing
scheduled interest due on any date or dates in any month or months subsequent to
the month of prepayment. Partial Principal Prepayments shall be applied by the
Servicer in accordance with the terms of the related Mortgage Note.

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

            Principal Remittance Amount: With respect to any Distribution Date
and each Loan Group, the amount equal to the sum of the following amounts
(without duplication) with respect to the immediately preceding Remittance
Period: (i) each payment of principal on a Mortgage Loan in the related Loan
Group received by the Servicer during such Remittance Period, including all full
and partial principal prepayments, (ii) the Liquidation Proceeds on the Mortgage
Loans in the related Loan Group allocable to principal actually collected by the
Servicer during the related Remittance Period, (iii) the portion of the purchase
price with respect to each Deleted Mortgage Loan in the related Loan Group, the
repurchase obligation for which arose during the related Remittance Period and
that was repurchased prior to the related Distribution Account Deposit Date,
(iv) the principal portion of any Substitution Adjustment Amounts in connection
with a substitution of a Mortgage Loan in the related Loan Group as of such
Distribution Date, (v) with respect to the Distribution Date occurring in the
month following the end of the Pre-Funding Period, the related Unutilized
Pre-Funding Amount and (vi) the allocable portion of the proceeds received with
respect to the termination of the Trust Fund (to the extent such proceeds relate
to principal).

            Private Certificates:   As specified in the Preliminary Statement.

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

            Prospectus Supplement:   The Prospectus Supplement dated
[                         ] relating to the Offered Certificates.

            PUD:   Planned Unit Development.

            Purchase Price: With respect to any Modified Mortgage Loan or any
Mortgage Loan required to be purchased by the Seller pursuant to Section 2.02 or
2.03 or purchased at the option of the Servicer pursuant to Section 3.12, an
amount equal to the sum of (i) 100% of the unpaid principal balance of the
Mortgage Loan on the date of such purchase, and (ii) accrued interest thereon at
the applicable Mortgage Rate (or at the applicable Adjusted Net Mortgage Rate if
(x) the purchaser is the Servicer or (y) if the purchaser is the Seller and the
Seller is the Servicer) from the date through which interest was last paid by
the Mortgagor to the Due Date in the month in which the Purchase Price is to be
distributed to Certificateholders and (iii) any costs and damages incurred by
the Trust Fund in connection with any violation by the Mortgage Loan


                                      I-24
<PAGE>


of any predatory or abusive lending law, provided, however, that if such
Mortgage Loan is a Modified Mortgage Loan, the interest component of the
Purchase Price shall be computed (i) on the basis of the applicable Adjusted Net
Mortgage Rate before giving effect to the related modification and (ii) from the
date to which interest was last paid to the date on which such Modified Mortgage
Loan is assigned to the Servicer pursuant to Section 3.12(c).

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

            Rating Agency: Each of the Rating Agencies specified in the
Preliminary Statement. If either such organization or a successor is no longer
in existence, "Rating Agency" shall be such nationally recognized statistical
rating organization, or other comparable Person, as is designated by the
Depositor, notice of which designation shall be given to the Trustee. References
herein to a given rating or rating category of a Rating Agency shall mean such
rating category without giving effect to any modifiers. For purposes of Section
10.05(b), the addresses for notices to each Rating Agency shall be (i) [S&P] and
(ii) [Fitch, Attention: Residential Mortgage Surveillance Monitoring], or such
other address as either such Rating Agency may hereafter furnish to the
Depositor and the Servicer.

            Realized Loss: The excess of the Stated Principal Balance of a
defaulted Mortgage Loan over the net Liquidation Proceeds with respect thereto
that are allocated to principal.

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

            Record Date: With respect to any Distribution Date, the close of
business on the last Business Day of the month preceding the month in which such
applicable Distribution Date occurs.

             Reference Bank:   As defined in Section 4.07.

            Refinance Loan:   Any Mortgage Loan the proceeds of which are used
to refinance an existing mortgage loan.

            Regular Certificates:   As specified in the Preliminary Statement.

             Regulation AB:   Subpart 229.1100 - Asset Backed Securities
(Regulation AB), 17 C.F.R. ss.ss.229.1100-229.1123, as such may be amended from
time to time, and subject to such clarification and interpretation as have
been provided by the Commission in the adopting release


                                      I-25
<PAGE>


(Asset-Backed Securities, Securities Act Release No. 33-8518, 70 Fed. Reg.
1,506, 1,531 (Jan. 7, 2005)) or by the staff of the Commission, or as may be
provided by the Commission or its staff from time to time.

            Relevant Mortgage Loan: A Mortgage Loan as to which there has been a
reduction in the amount of interest collectible thereon for the most recently
ended calendar month as a result of the application of the Relief Act, the
amount, if any, by which interest collectible on such Mortgage Loan for the most
recently ended calendar month is less than interest accrued thereon for such
month pursuant to the Mortgage Note.

            Relief Act:   The Servicemembers Civil Relief Act of 1940, as
amended.

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

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

            REMIC Change of Law: Any proposed, temporary or final regulation,
revenue ruling, revenue procedure or other official announcement or
interpretation relating to REMICs and the REMIC Provisions issued after the
Closing Date.

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

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

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

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

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


                                      I-26
<PAGE>


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

            (c) with respect to the Servicer only, if the Servicer becomes aware
      of any bankruptcy or receivership with respect to the Seller, the
      Depositor, the Servicer, the Trustee, the Corridor Contract Counterparty,
      the Class AF-5B Insurer, any enhancement or support provider contemplated
      by Items 1114(b) or 1115 of Regulation AB, or any other material party
      contemplated by Item 1101(d)(1) of Regulation AB;

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

            (e) any amendment to this Agreement;

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

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

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

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

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

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


                                      I-27
<PAGE>


             Required Reserve Amount: On any Distribution Date that (A) the Group
2 WAC Cap exceeds the Pass-Through Rate on the Class BV Certificate by less than
[      ]% ([      ] basis points), the greater of $[      ] or the product of (i)
[      ]% and the Class Certificate Balance of the Adjustable Rate Certificates
as of such Distribution Date and (B) the Group 2 WAC Cap exceeds the
Pass-Through Rate on the Class BV Certificates by more than [      ]%, $[      ].

            Residual Certificates:   As specified in the Preliminary Statement.

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

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

            Sarbanes-Oxley Certification:   As defined in Section 11.05.

            [S&P: Standard & Poor's, a division of The McGraw-Hill Companies. If
S&P is designated as a Rating Agency in the Preliminary Statement, for purposes
of Section 10.05(b) the address for notices to S&P shall be Standard & Poor's
Ratings Group, 26 Broadway, 10th Floor, New York, New York 10004, Attention:
Mortgage Surveillance Monitoring, or such other address as S&P may hereafter
furnish to the Depositor and the Servicer.]

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

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

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

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

            Senior Enhancement Percentage: With respect to either Certificate
Group and any Distribution Date, the percentage obtained by dividing (x) the sum
of (i) the aggregate Class Certificate Balance of the Subordinated Certificates
of such Certificate Group and (ii) the related Subordinated Amount (in each case
after taking into account the distributions of the related Principal
Distribution Amount for such Distribution Date) by (y) the aggregate Stated
Principal


                                      I-28
<PAGE>

Balance of the Mortgage Loans in the related Loan Group as of the last
day of the related Remittance Period.

            Senior Specified Enhancement Percentage: As of any date of
Determination, [ ]% with respect to Certificate Group 1 and [ ]% with respect to
Certificate Group 2.

            Servicer:   [IndyMac Bank, F.S.B.],   a federal savings bank, and
its successors and assigns, in its capacity as servicer hereunder.

             Servicer Advance Date:   As to any Distribution Date, 12:30 p.m.
Pacific time on the Business Day immediately preceding such Distribution Date.

            Servicer Event of Default:   As defined in Section 7.01(I).

            Servicer Prepayment Charge Payment Amount:   The amounts payable
by the Servicer in respect of waived Prepayment Charges pursuant to Section
3.06(d)(ix).

            Servicing Account:   The separate Eligible Account or Accounts
created and maintained pursuant to Section 3.06(b) hereof.

            Servicing Advances: All customary, reasonable and necessary "out of
pocket" costs and expenses incurred in the performance by the Servicer of its
servicing obligations, including, but not limited to, the cost of (i) (a) the
preservation, restoration and protection of a Mortgaged Property, (b) expenses
reimbursable to the Servicer pursuant to Section 3.12 and any enforcement or
judicial proceedings, including foreclosures, (c) the maintenance and
liquidation of any REO Property and (d) compliance with the obligations under
Section 3.10; and (ii) reasonable compensation to the Servicer or its affiliates
for acting as broker in connection with the sale of foreclosed Mortgaged
Properties and for performing certain default management and other similar
services (including, but not limited to, appraisal services) in connection with
the servicing of defaulted Mortgage Loans; provided, however, that for purposes
of this clause (ii), only costs and expenses incurred in connection with the
performance of activities generally considered to be outside the scope of
customary servicing or servicing duties shall be treated as Servicing Advances.

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

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

             Servicing Fee Rate: With respect to any Mortgage Loan, the per annum
rate set forth in the Mortgage Loan Schedule for such Mortgage Loan.


                                      I-29
<PAGE>


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

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

             60+ Day Delinquent Loan: Each Mortgage Loan with respect to which
any portion of a Scheduled Payment is, as of the last day of the prior
Remittance Period, two months or more past due (without giving effect to any
grace period), each Mortgage Loan in foreclosure, all REO Property and each
Mortgage Loan for which the Mortgagor has filed for bankruptcy.

            Specified Subordinated Amount: With respect to each Loan Group prior
to the Stepdown Date for the related Certificate Group, an amount equal to [ ]%
for Loan Group 1 and [ ]% for Loan Group 2, of the Cut-off Date Principal
Balance of the Mortgage Loans in the related Loan Group, and with respect to
each Loan Group on and after the Stepdown Date for the related Certificate
Group, an amount equal to [ ]% for Loan Group 1 and [ ]% for Loan Group 2, of
the aggregate Stated Principal Balance of the Mortgage Loans in such Loan Group
as of the last day of the related Remittance Period, subject to a minimum amount
equal to [ ]% for each Loan Group of the aggregate Stated Principal Balance of
the Mortgage Loans in that Loan Group as of the related Cut-off Date, provided,
however, that if, on any Distribution Date, a Trigger Event for a Certificate
Group has occurred, the Specified Subordinated Amount shall not be reduced to
the applicable percentage of the then current aggregate Stated Principal Balance
of the Mortgage Loans in the related Loan Group until the Distribution Date on
which a Trigger Event for such Certificate Group is no longer occurring.

             SR Interest: As defined in the Preliminary Statement.

            Startup Day:   [The Closing Date].

            Stated Principal Balance: As to any Mortgage Loan and Due Date, the
unpaid principal balance of such Mortgage Loan as of such Due Date as specified
in the amortization schedule at the time relating thereto (before any adjustment
to such amortization schedule by reason of any moratorium or similar waiver or
grace period) after giving effect to any previous partial Principal Prepayments
and Liquidation Proceeds allocable to principal (other than with respect to any
Liquidated Mortgage Loan) and to the payment of principal due on such Due Date
and irrespective of any delinquency in payment by the related Mortgagor.

            Stepdown Date: With respect to either Loan Group, the later to occur
of (i) the Distribution Date in [ ] and (ii) the first Distribution Date on
which the Senior Enhancement Percentage (calculated for this purpose only after
taking into account distributions of principal on the Mortgage Loans in the
related Loan Group on the last day of the related Remittance Period but prior to
any applications of Principal Distribution Amount to the related Certificates)
is greater than or equal to the related Senior Specified Enhancement Percentage.


                                      I-30
<PAGE>


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

            Subordinated Amount: For each Certificate Group and as of any
Distribution Date and related Loan Group, the excess, if any, of (a) the
aggregate Stated Principal Balance of the Mortgage Loans in such Loan Group as
of the end of the related Remittance Period over (b) the aggregate of the Class
Certificate Balances of the Offered Certificates in the related Certificate
Group as of such Distribution Date (after giving effect to the payment of
principal on such Certificates on such Distribution Date) plus amount in the
related Pre-Funding Account, if any, excluding investment earnings.

            Subordinated Certificates:   As specified in the Preliminary
Statement.

            Subordination Deficiency: With respect to any Distribution Date and
either Loan Group, the excess, if any, of (a) the Specified Subordinated Amount
for the related Certificate Group applicable to such Distribution Date over (b)
the Subordinated Amount for such Certificate Group applicable to such
Distribution Date.

             Subordination Reduction Amount: With respect to any Distribution
Date and either Loan Group, an amount equal to the lesser of (a) the related
Excess Subordinated Amount and (b) the Total Monthly Excess Spread for the
related Certificate Group.

             Subsequent Mortgage Loan: Such of the mortgage loans transferred and
assigned to the Trustee pursuant to (i) the provisions of a Subsequent Transfer
Agreement and (ii) the provisions hereof, as from time to time are held as a
part of the Trust Fund (including any REO Property), the mortgage loans so held
being identified on the Mortgage Loan Schedule for the related Subsequent
Transfer Date, notwithstanding foreclosure or other acquisition of title of the
related Mortgaged Property. When used with respect to a single Subsequent
Transfer Date, "Subsequent Mortgage Loan" shall mean a Subsequent Mortgage Loan
conveyed to the Trust Fund on such Subsequent Transfer Date.

            Subsequent Transfer Agreement: A Subsequent Transfer Agreement
substantially in the form of Exhibit O hereto, executed and delivered by the
Seller, the Depositor and the Trustee as provided in Section 2.09(a).

            Subsequent Transfer Date: For any Subsequent Transfer Agreement, the
"Subsequent Transfer Date" identified in such Subsequent Transfer Agreement;
provided, however, the Subsequent Transfer Date for any Subsequent Transfer
Agreement may not be a date earlier than the date on which the Subsequent
Transfer Agreement is executed and delivered by the parties thereto pursuant to
Section 2.09(a).

            Subsidiary REMIC: As defined in the Preliminary Statement.

            Substitute Mortgage Loan: A Mortgage Loan substituted by the Seller
for a Deleted Mortgage Loan which must, on the date of such substitution, as
confirmed in a Request


                                      I-31
<PAGE>


for Release, substantially in the form of Exhibit M, (i) have a Stated Principal
Balance, after deduction of the principal portion of the Scheduled Payment due
in the month of substitution, not in excess of, and not more than [10]% less
than, the Stated Principal Balance of the Deleted Mortgage Loan; (ii) be
accruing interest at a rate no lower than and not more than [1]% per annum
higher than, that of the Deleted Mortgage Loan; (iii) have a Loan-to-Value Ratio
or Combined Loan-to-Value Ratio (as applicable) no higher than that of the
Deleted Mortgage Loan; (iv) have a remaining term to maturity no greater than
(and not more than one year less than that of) the Deleted Mortgage Loan; (v)
not be a Cooperative Loan unless the Deleted Mortgage Loan was a Cooperative
Loan, (vi) comply with each representation and warranty set forth in Section
2.03, (vii) satisfy the criteria for inclusion in the applicable Loan Group.

             Substitution Adjustment Amount: The meaning ascribed to such term
pursuant to Section 2.03.

            Telerate Page 3750: The display page currently so designated on the
Bridge Telerate Service (or such other page as may replace that page on that
service for displaying comparable rates or prices).

            Total Monthly Excess Spread: As to either Loan Group and any
Distribution Date, an amount equal to the excess if any, of (i) the interest
collected or advanced on the related Mortgage Loans during the related
Remittance Period plus the related Capitalized Interest Requirement for such
Distribution Date over (ii) the sum of the interest payable to the Classes of
Certificates in the related Certificate Group on such Distribution Date.

            Transaction Documents: This Agreement, [each Yield Maintenance
Agreement,] [the Class [ ] Policy] and any other document or agreement entered
into in connection with the Trust Fund, the Certificates or the Mortgage Loans.

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

            Trigger Event: With respect to the Certificates of a Certificate
Group after a Stepdown Date for the related Loan Group, exists if the quotient
(expressed as a percentage) of (x) the three month rolling average of 60+ Day
Delinquent Loans for the related Loan Group, as of the last day of the related
Remittance Period, over (y) the Stated Principal Balance of the Mortgage Loans
in that Loan Group equals or exceeds [50]% (in the case of Loan Group 1) or
[40]% (in the case of Loan Group 2) of the related Senior Enhancement
Percentage.

            Trust Fund: The corpus of the trust created hereunder consisting of
(i) the Mortgage Loans and all interest and principal received on or with
respect thereto after the related Cut-off Date, other than such amounts which
were due on the Mortgage Loans on or before the related Cut-off Date; (ii) the
Certificate Account, Excess Reserve Fund Account, the Distribution Account, the
Pre-Funding Accounts and the Capitalized Interest Accounts and all amounts
deposited therein pursuant to the applicable provisions of this Agreement
(including, without limitation, amounts received from the Seller on the Closing
Date which shall be deposited by the Trustee in the Certificate Account pursuant
to Section 2.01); (iii) property that secured a Mortgage Loan and has been
acquired by foreclosure, deed-in-lieu of foreclosure or otherwise;


                                      I-32
<PAGE>


(iv) the right to collect any amounts under any mortgage insurance policies
covering any Mortgage Loan and any collections received under any mortgage
insurance policies covering any Mortgage Loan; (v) all rights to receive amounts
under, and to enforce remedies in, the Cap Contract, and (vi) all proceeds of
the conversion, voluntary or involuntary, of any of the foregoing.

            Trustee: [         ] and its successors and, if a successor trustee
is appointed hereunder, such successor.

            Trustee Fee: As to each Mortgage Loan and any Distribution Date, an
amount equal to one month's interest at the related Trustee Fee Rate on the
Stated Principal Balance of such Mortgage Loan or, in the event of any payment
of interest which accompanies a Principal Prepayment in Full made by the
Mortgagor, interest at the Trustee Fee Rate on the Stated Principal Balance of
such Mortgage Loan for the period covered by such payment of interest.

            Trustee Fee Rate: With respect to each Mortgage Loan, the per annum
rate agreed upon in writing on or prior to the Closing Date by the Trustee and
the Depositor.

            Unpaid Interest Amounts: As of any Distribution Date and any Class
of Certificates, the sum of (a) the excess of (i) the sum of the Accrued
Certificate Interest Distribution Amount for such Distribution Date and any
portion of such Accrued Certificate Interest Distribution Amount from prior
Distribution Dates remaining unpaid over (ii) the amount in respect of interest
on such Class of Certificates actually distributed on the preceding Distribution
Date and (b) 30 days' interest on such excess at the applicable Pass-Through
Rate (to the extent permitted by applicable law).

            Unpaid Realized Loss Amount: With respect to any Class of
Subordinated Certificates and as to any Distribution Date, is the excess of (i)
Applied Realized Loss Amounts with respect to such Class over (ii) the sum of
all distributions in reduction of such Applied Realized Loss Amounts on all
previous Distribution Dates. Any amounts distributed to a Class of Subordinated
Certificates in respect of any Unpaid Realized Loss Amount will not be applied
to reduce the Class Certificate Balance of such Class.

            United States Person or U.S. Person: Shall mean (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.


                                      I-33
<PAGE>


            Unutilized Pre-Funding Amount:   The Pre-Funding Amount
immediately after the end of the Pre-Funding Period.

            Upper Tier Regular Interest:   As described in the Preliminary
Statement.

            Upper Tier REMIC:.   As described in the Preliminary Statement.

            Voting Rights: The portion of the voting rights of all of the
Certificates which is allocated to any Certificate. As of any date of
determination, (a) [1]% of all Voting Rights shall be allocated to the Class X
Certificates, if any (such Voting Rights to be allocated among the holders of
Certificates of each such Class in accordance with their respective Percentage
Interests) and (b) the remaining Voting Rights shall be allocated among Holders
of the remaining Classes of Certificates in proportion to the Certificate
Balances of their respective Certificates on such date.

            SECTION 1.01. Rules of Construction

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

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

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

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

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

            (e) A reference to "a [thing]" or "any [of a thing]" does not imply
the existence or occurrence of the thing referred to even though not followed by
"if any," and "any [of a thing]" is any of it. A reference to the plural of
anything as to which there could be either one or more than one does not imply
the existence of more than one (for instance, the phrase "the obligors on a
note" means "the obligor or obligors on a note"). "Until [something occurs]"
does


                                       I-34
<PAGE>


not imply that it must occur, and will not be modified by the word "unless." The
word "due" and the word "payable" are each used in the sense that the stated
time for payment has passed. The word "accrued" is used in its accounting sense,
i.e., an amount paid is no longer accrued. In the calculation of amounts of
things, differences and sums may generally result in negative numbers, but when
the calculation of the excess of one thing over another results in zero or a
negative number, the calculation is disregarded and an "excess" does not exist.
Portions of things may be expressed as fractions or percentages interchangeably.

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

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

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


                                      I-35
<PAGE>


                                    ARTICLE II

                          CONVEYANCE OF MORTGAGE LOANS;
                         REPRESENTATIONS AND WARRANTIES

            SECTION 2.01. Conveyance of Mortgage Loans.

            (a) The Seller, concurrently with the execution and delivery hereof,
hereby sells, transfers, assigns, sets over and otherwise conveys to the
Depositor, without recourse, all the right, title and interest of the Seller in
and to each Initial Mortgage Loan, including all interest and principal received
or receivable by the Seller on or with respect to each Initial Mortgage Loan
after the related Cut-off Date and all interest and principal payments on each
Initial Mortgage Loan received prior to such related Cut-off Date in respect of
installments of interest and principal due thereafter, but not including
payments of principal and interest due and payable on each Initial Mortgage Loan
on or before such related Cut-off Date. On or prior to the Closing Date, the
Seller shall deliver to the Depositor or, at the Depositor's direction, to the
Trustee or other designee of the Depositor, the Mortgage File for each Initial
Mortgage Loan listed in the Mortgage Loan Schedule as of the Closing Date. Such
delivery of the Mortgage Files shall be made against payment by the Depositor of
the purchase price, previously agreed to by the Seller and Depositor, for the
Initial Mortgage Loans.

            (b) The Depositor, concurrently with the execution and delivery
hereof, hereby sells, transfers, assigns, sets over and otherwise conveys to the
Trustee for the benefit of the Certificateholders, without recourse, all the
right, title and interest of the Depositor in and to the Trust Fund, together
with the Depositor's right to require the Seller to cure any breach of a
representation or warranty made herein by the Seller or to repurchase or
substitute for any affected Initial Mortgage Loan in accordance herewith.

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

                  (i) (A) the original Mortgage Note, endorsed by manual or
            facsimile signature in blank in the following form: "Pay to the
            order of ______________ without recourse", with all intervening
            endorsements showing a complete chain of endorsement from the
            originator to the Person endorsing the Mortgage Note (each such
            endorsement being sufficient to transfer all right, title and
            interest of the party so endorsing, as noteholder or assignee
            thereof, in and to that Mortgage Note) and (B) with respect to any
            Lost Mortgage Note, a lost note affidavit from the Seller stating
            that the original Mortgage Note was lost or destroyed, together with
            a copy of such Mortgage Note;


                                      II-1
<PAGE>


                  (ii) Except as provided below and for each Mortgage Loan that
            is not a MERS Mortgage Loan, the original recorded Mortgage or a
             copy of such Mortgage certified by the Seller as being a true and
            complete copy of the Mortgage (or, in the case of a Mortgage for
            which the related Mortgaged Property is located in the Commonwealth
            of Puerto Rico, a true copy of the Mortgage certified as such by the
            applicable notary) and in the case of each MERS Mortgage Loan, the
            original Mortgage, noting the presence of the MIN of the Mortgage
            Loan and either language indicating that the Mortgage Loan is a MOM
            Loan if the Mortgage Loan is a MOM Loan or if the Mortgage Loan was
            not a MOM Loan at origination, the original Mortgage and the
            assignment thereof to MERS, with evidence of recording indicated
            thereon, or a copy of the Mortgage certified by the public recording
            office in which such Mortgage has been recorded;

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

                  (iv) the original or copies of each assumption, modification,
            written assurance or substitution agreement, if any;

                  (v) except as provided below, the original or duplicate
            original lender's title policy and all riders thereto; and

                  (vi) in the case of a Cooperative Loan, the originals of the
            following documents or instruments:

                  (a)    The Coop Shares, together with a stock power in blank;

                  (b)    The executed Security Agreement;

                  (c)    The executed Proprietary Lease;

                  (d)    The executed Recognition Agreement;

                  (e)    The executed UCC-1 financing statement with evidence of
                        recording thereon which have been filed in all places
                        required to perfect the Seller's interest in the Coop
                        Shares and the Proprietary Lease; and


                                      II-2
<PAGE>


                  (f)    Executed UCC-3 financing statements or other appropriate
                        UCC financing statements required by state law,
                        evidencing a complete and unbroken line from the
                        mortgagee to the Trustee with evidence of recording
                        thereon (or in a form suitable for recordation). If in
                         connection with any Mortgage Loan the Depositor cannot
                        deliver

                        (i)    the original recorded Mortgage,

                        (ii)   all interim recorded assignments, or

                        (iii) the lender's title policy (together with all its
                              riders).

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

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


                                      II-3
<PAGE>


possible upon receipt thereof and, in any event, within [720] days following the
Closing Date (or, for a Subsequent Mortgage Loan, the Subsequent Transfer Date).
The Depositor shall forward or cause to be forwarded to the Trustee (a) from
time to time additional original documents evidencing an assumption or
modification of a Mortgage Loan and (b) any other documents required to be
delivered by the Depositor or the Servicer to the Trustee. In the event that the
original Mortgage is not delivered and in connection with the payment in full of
the related Mortgage Loan the public recording office requires the presentation
of a "lost instruments affidavit and indemnity" or any equivalent document,
because only a copy of the Mortgage can be delivered with the instrument of
satisfaction or reconveyance, the Servicer shall execute and deliver or cause to
be executed and delivered such a document to the public recording office. In the
case where a public recording office retains the original recorded Mortgage or
in the case where a Mortgage is lost after recordation in a public recording
office, the Seller shall deliver to the Trustee a copy of such Mortgage
certified by such public recording office to be a true and complete copy of the
original recorded Mortgage.

            As promptly as practicable subsequent to such transfer and
assignment, and in any event, within thirty (30) days thereafter, the Trustee
shall (i) affix the Trustee's name to each assignment of Mortgage, as the
assignee thereof and (ii) cause to be delivered for recording in the appropriate
public office for real property records the assignments of the Mortgages to the
Trustee, except that, with respect to any assignment of a Mortgage as to which
the Trustee has not received the information required to deliver such
assignment, the Trustee's obligation to do so and to deliver the same for such
recording shall be as soon as practicable after receipt of such information and
in any event within [thirty (30)] days after the receipt thereof, and the
Trustee need not cause to be recorded any assignment which relates to a Mortgage
Loan (a) the Mortgaged Property and Mortgage File relating to which are located
in California or (b) in any other jurisdiction (including Puerto Rico) under the
laws of which, as evidenced by an Opinion of Counsel delivered by the Seller (at
the Seller's expense) to the Trustee, the recordation of such assignment is not
necessary to protect the Trustee's and the Certificateholders' interest in the
related Mortgage Loan.

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

            Notwithstanding anything to the contrary in this Agreement, within
[five] Business Days after the Closing Date (in the case of Initial Mortgage
Loans) or within [thirty] days of the Subsequent Transfer Date (in the case of
Subsequent Mortgage Loans), the Seller shall either (i) deliver to the Trustee
the Mortgage File as required pursuant to this Section 2.01 for each Delay
Delivery Mortgage Loan or (ii) (A) repurchase the Delay Delivery Mortgage Loan
or (B) substitute the Delay Delivery Mortgage Loan for a Substitute Mortgage
Loan, which repurchase or substitution shall be accomplished in the manner and
subject to the conditions set forth in Section 2.03, provided that if the Seller
fails to deliver a Mortgage File for any Delay Delivery Mortgage Loan within the
period provided in the prior sentence, the cure period provided for in Section
2.02 or in Section 2.03 shall not apply to the initial delivery of the Mortgage
File for such Delay Delivery Mortgage Loan, but rather the Seller shall have
[five (5)] Business Days to cure such failure to deliver. The Seller shall
promptly provide each Rating


                                      II-4
<PAGE>


Agency with written notice of any cure, repurchase or substitution made pursuant
to the proviso of the preceding sentence. On or before the [fifth] Business Day
after the Closing Date (in the case of Initial Mortgage Loans) or the
[thirtieth] ([30]th) day (or if such [thirtieth] day is not a Business Day, the
succeeding Business Day) after Subsequent Transfer Date (in the case of
Subsequent Mortgage Loans), the Trustee shall, in accordance with the provisions
of Section 2.02, send a Delay Delivery Certification substantially in the form
annexed hereto as Exhibit G-1 (with any applicable exceptions noted thereon) for
all Delay Delivery Mortgage Loan delivered within the specified numbers of days
after the pertinent date. The Trustee will promptly send a copy of such Delay
Delivery Certification to each Rating Agency. The Seller shall use its best
reasonable efforts to effect a substitution, rather than a repurchase of, any
Deleted Mortgage Loan.

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

            SECTION 2.02. Acceptance by the Trustee of the Mortgage Loans.

            (a) The Trustee acknowledges receipt of the documents identified in
the Initial Certification in the form annexed hereto as Exhibit G, and receipt
of the amount of $[      ] for deposit in the Group 1 Pre-Funding Account and the
amount of $[          ] for deposit in the Group 2 Pre-Funding Account and
declares that it holds and will hold such documents and the other documents
delivered to it constituting the Mortgage Files for the Initial Mortgage Loans,
that it holds and will hold all amounts in the Pre-Funding Accounts and the
Capitalized Interest Accounts, and that it holds or will hold such other assets
as are included in the Trust Fund, in trust for the exclusive use and benefit of
all present and future Certificateholders. The Trustee acknowledges that it will
maintain possession of the related Mortgage Notes in the State of California,
unless otherwise permitted by the Rating Agencies.

            The Trustee agrees to execute and deliver on the Closing Date to the
Depositor, the Servicer and the Seller an Initial Certification in the form
annexed hereto as Exhibit G. Based on its review and examination, and only as to
the documents identified in such Initial Certification, the Trustee acknowledges
that such documents appear regular on their face and relate to such Initial
Mortgage Loans. The Trustee shall be under no duty or obligation to inspect,
review or examine said documents, instruments, certificates or other papers to
determine that the same are genuine, enforceable or appropriate for the
represented purpose or that they have actually been recorded in the real estate
records or that they are other than what they purport to be on their face.

            On or before the [thirtieth (30th)] day after the Closing Date (or
if such [thirtieth] day is not a Business Day, the succeeding Business Day), the
Trustee shall deliver to the Depositor, the Servicer and the Seller a Delay
Delivery Certification with respect to the Initial Mortgage Loans substantially
in the form annexed hereto as Exhibit G-1, with any applicable exceptions noted
thereon.

            Not later than [90] days after the Closing Date, the Trustee shall
deliver to the Depositor, the Servicer and the Seller a Final Certification in
the form annexed hereto as Exhibit H, with any applicable exceptions noted
thereon.


                                      II-5
<PAGE>


            If, in the course of such review, the Trustee finds any document
constituting a part of a Mortgage File which does not meet the requirements of
Section 2.01, the Trustee shall list such as an exception in the Final
Certification; provided, however, that the Trustee shall not make any
determination as to whether (i) any endorsement is sufficient to transfer all
right, title and interest of the party so endorsing, as noteholder or assignee
thereof, in and to that Mortgage Note or (ii) any assignment is in recordable
form or is sufficient to effect the assignment of and transfer to the assignee
thereof under the mortgage to which the assignment relates. The Seller shall
promptly correct or cure such defect within [90] days from the date it was so
notified of such defect and, if the Seller does not correct or cure such defect
within such period, the Seller shall either (a) substitute for the related
Initial Mortgage Loan a Substitute Mortgage Loan, which substitution shall be
accomplished in the manner and subject to the conditions set forth in Section
2.03, or (b) purchase such Initial Mortgage Loan from the Trustee within [90]
days from the date the Seller was notified of such defect in writing at the
Purchase Price of such Initial Mortgage Loan; provided, however, that in no
event shall such substitution or purchase occur more than [540] days from the
Closing Date, except that if the substitution or purchase of an Initial Mortgage
Loan pursuant to this provision is required by reason of a delay in delivery of
any documents by the appropriate recording office, or there is a dispute between
either the Servicer or the Seller and the Trustee over the location or status of
the recorded document, then such substitution or purchase shall occur within
[720] days from the Closing Date. The Trustee shall deliver written notice to
each Rating Agency within [270] days from the Closing Date indicating each
Initial Mortgage Loan (a) which has not been returned by the appropriate
recording office or (b) as to which there is a dispute as to location or status
of such Initial Mortgage Loan. Such notice shall be delivered every [90] days
thereafter until the related Initial Mortgage Loan is returned to the Trustee.
Any such substitution pursuant to (a) above or purchase pursuant to (b) above
shall not be effected prior to the delivery to the Trustee of the Opinion of
Counsel required by Section 2.05, if any, and any substitution pursuant to (a)
above shall not be effected prior to the additional delivery to the Trustee of a
Request for Release substantially in the form of Exhibit N. No substitution is
permitted to be made in any calendar month after the Determination Date for such
month. The Purchase Price for any such Initial Mortgage Loan shall be deposited
by the Seller in the Certificate Account on or prior to the Distribution Account
Deposit Date for the Distribution Date in the month following the month of
repurchase and, upon receipt of such deposit and certification with respect
thereto in the form of Exhibit N hereto, the Trustee shall release the related
Mortgage File to the Seller and shall execute and deliver at the Seller's
request such instruments of transfer or assignment prepared by the Seller, in
each case without recourse, as shall be necessary to vest in the Seller, or a
designee, the Trustee's interest in any Initial Mortgage Loan released pursuant
hereto.

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

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


                                      II-6
<PAGE>


            (b) The Trustee agrees to execute and deliver to the Depositor, the
Servicer and the Seller on the Subsequent Transfer Date an Initial Certification
in the form annexed hereto as Exhibit G acknowledging receipt of the documents
identified in such Initial Certification and declaring that it holds and will
hold such documents and the other documents delivered to it constituting the
Mortgage Files for the related Subsequent Mortgage Loans, and that it holds or
will hold such other assets as are included in the Trust Fund, in trust for the
exclusive use and benefit of all present and future Certificateholders. The
Trustee acknowledges that it will maintain possession of the related Mortgage
Notes in the State of California, unless otherwise permitted by the Rating
Agencies.

            Based on its review and examination, and only as to the documents
identified in such Initial Certification, the Trustee acknowledges that such
documents appear regular on their face and relate to such Subsequent Mortgage
Loan. The Trustee shall be under no duty or obligation to inspect, review or
examine said documents, instruments, certificates or other papers to determine
that the same are genuine, enforceable or appropriate for the represented
purpose or that they have actually been recorded in the real estate records or
that they are other than what they purport to be on their face.

            Not later than [90] days after the Subsequent Transfer Date, the
Trustee shall deliver to the Depositor, the Servicer and the Seller a Final
Certification in the form annexed hereto as Exhibit H, with any applicable
exceptions noted thereon.

            If, in the course of such review, the Trustee finds any document
constituting a part of a Subsequent Mortgage File which does not meet the
requirements of Section 2.01, the Trustee shall list such as an exception in the
Final Certification; provided, however, that the Trustee shall not make any
determination as to whether (i) any endorsement is sufficient to transfer all
right, title and interest of the party so endorsing, as Noteholder or assignee
thereof, in and to that Mortgage Note or (ii) any assignment is in recordable
form or is sufficient to effect the assignment of and transfer to the assignee
thereof under the mortgage to which the assignment relates. The Seller shall
promptly correct or cure such defect within [90] days from the date it was so
notified of such defect and, if the Seller does not correct or cure such defect
within such period, the Seller shall either (a) substitute for the related
Subsequent Mortgage Loan a Substitute Mortgage Loan, which substitution shall be
accomplished in the manner and subject to the conditions set forth in Section
2.03, or (b) purchase such Subsequent Mortgage Loan from the Trustee within [90]
days from the date the Seller was notified of such defect in writing at the
Purchase Price of such Subsequent Mortgage Loan; provided, however, that in no
event shall such substitution or purchase occur more than [540] days from the
Subsequent Transfer Date, except that if the substitution or purchase of a
Subsequent Mortgage Loan pursuant to this provision is required by reason of a
delay in delivery of any documents by the appropriate recording office, or there
is a dispute between either the Servicer or the Seller and the Trustee over the
location or status of the recorded document, then such substitution or purchase
shall occur within [720] days from the Subsequent Transfer Date. The Trustee
shall deliver written notice to each Rating Agency within [270] days from the
Subsequent Transfer Date indicating each Subsequent Mortgage Loan (a) which has
not been returned by the appropriate recording office or (b) as to which there
is a dispute as to location or status of such Mortgage Loan. Such notice shall
be delivered every [90] days thereafter until the related Subsequent Mortgage
Loan is returned to the Trustee. Any such substitution pursuant to (a)


                                       II-7
<PAGE>


above or purchase pursuant to (b) above shall not be effected prior to the
delivery to the Trustee of the Opinion of Counsel required by Section 2.05, if
any, and any substitution pursuant to (a) above shall not be effected prior to
the additional delivery to the Trustee of a Request for Release substantially in
the form of Exhibit N. No substitution is permitted to be made in any calendar
month after the Determination Date for such month. The Purchase Price for any
such Subsequent Mortgage Loan shall be deposited by the Seller in the
Certificate Account on or prior to the Distribution Account Deposit Date for the
Distribution Date in the month following the month of repurchase and, upon
receipt of such deposit and certification with respect thereto in the form of
Exhibit N hereto, the Trustee shall release the related Mortgage File to the
Seller and shall execute and deliver at the Seller's request such instruments of
transfer or assignment prepared by the Seller, in each case without recourse, as
shall be necessary to vest in the Seller, or a designee, the Trustee's interest
in any Subsequent Mortgage Loan released pursuant hereto.

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

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

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

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

            (a) [IndyMac], in its capacities as Seller and Servicer, hereby
makes the representations and warranties set forth in Schedule II hereto, and by
this reference incorporated herein, to the Depositor and the Trustee, as of the
Closing Date.

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

            (c) Upon discovery by any of the parties hereto of a breach of a
representation or warranty made pursuant to Section 2.03(b) that materially and
adversely affects the interests of the Certificateholders in any Mortgage Loan,
the party discovering such breach shall give prompt notice thereof to the other
parties. The Seller hereby covenants that within [90] days of


                                      II-8
<PAGE>


the earlier of its discovery or its receipt of written notice from any party of
a breach of any representation or warranty made pursuant to Section 2.03(b)
which materially and adversely affects the interests of the Certificateholders
in any Mortgage Loan, it shall cure such breach in all material respects, and if
such breach is not so cured, shall, (i) if such [90] day period expires prior to
the second anniversary of the Closing Date, remove such Mortgage Loan (a
"Deleted Mortgage Loan") from the Trust Fund and substitute in its place a
Substitute Mortgage Loan, in the manner and subject to the conditions set forth
in this Section 2.03; or (ii) repurchase the affected Mortgage Loan or Mortgage
Loans from the Trustee at the Purchase Price in the manner set forth below;
provided, however, that any such substitution pursuant to (i) above shall not be
effected prior to the delivery to the Trustee of the Opinion of Counsel required
by Section 2.05, if any, and a Request for Release substantially in the form of
Exhibit N, and the Mortgage File for any such Substitute Mortgage Loan; and
provided, further, that, anything to the contrary herein notwithstanding, Seller
shall have no obligation to cure any such breach or to repurchase or substitute
for such affected Mortgage Loan if the substance of such breach constitutes
fraud in the origination of such affected Mortgage Loan and the Seller, at the
time of such origination and on the Closing Date, did not have actual knowledge
of such fraud. The Seller shall promptly reimburse the Servicer and the Trustee
for any expenses reasonably incurred by the Servicer or the Trustee in respect
of enforcing the remedies for such breach.

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

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


                                      II-9
<PAGE>


            For any month in which the Seller substitutes one or more Substitute
Mortgage Loans for one or more Deleted Mortgage Loans, the Servicer will
determine the amount (if any) by which the aggregate principal balance of all
such Substitute Mortgage Loans as of the date of substitution is less than the
aggregate Stated Principal Balance of all such Deleted Mortgage Loans (after
application of the scheduled principal portion of the monthly payments due in
the Remittance Period of substitution and any adjustment due to any costs or
damages incurred by the Trust Fund in connection with any violation of the
Mortgae Loan of any predatory or abusive lending law). The amount of such
shortage (the "Substitution Adjustment Amount") plus, if the Seller is not the
Servicer, an amount equal to the aggregate of any unreimbursed Advances and
Servicing Advances with respect to such Deleted Mortgage Loans shall be
deposited into the Certificate Account by the Seller on or before the
Distribution Account Deposit Date for the Distribution Date in the month
succeeding the calendar month during which the related Mortgage Loan became
required to be purchased or replaced hereunder.

            In the event that the Seller repurchases a Mortgage Loan, the
Purchase Price therefor shall be deposited in the Certificate Account pursuant
to Section 3.06 on or before the Distribution Account Deposit Date for the
Distribution Date in the month following the month during which the Seller
became obligated hereunder to repurchase or replace such Mortgage Loan and upon
such deposit of the Purchase Price, the delivery of the Opinion of Counsel
required by Section 2.05 and receipt of a Request for Release in the form of
Exhibit N hereto, the Trustee shall release the related Mortgage File held for
the benefit of the Certificateholders to such Person, and the Trustee shall
execute and deliver at such Person's direction such instruments of transfer or
assignment prepared by such Person, in each case without recourse, as shall be
necessary to transfer title from the Trustee. It is understood and agreed that
the obligation under this Agreement of any Person to cure, repurchase or replace
any Mortgage Loan as to which a breach has occurred and is continuing shall
constitute the sole remedy against such Persons respecting such breach available
to Certificateholders, the Depositor or the Trustee on their behalf.

            The representations and warranties made pursuant to this Section
2.03 shall survive delivery of the respective Mortgage Files to the Trustee for
the benefit of the Certificateholders.

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

            The Depositor hereby represents and warrants to the Trustee with
respect to each Mortgage Loan as of the date hereof or such other date set forth
herein that as of the Closing Date (or, for a Subsequent Mortgage Loan, the
Subsequent Transfer Date), and following the transfer of the Mortgage Loans to
it by the Seller, the Depositor had good title to the Mortgage Loans and the
Mortgage Notes were subject to no offsets, defenses or counterclaims.

            The Depositor hereby assigns, transfers and conveys to the Trustee
all of its rights with respect to the Mortgage Loans including, without
limitation, the representations and warranties of the Seller made pursuant to
Section 2.03(b), together with all rights of the Depositor to require the Seller
to cure any breach thereof or to repurchase or substitute for any affected
Mortgage Loan in accordance with this Agreement.


                                     II-10
<PAGE>


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

            SECTION 2.05. Delivery of Opinion of Counsel in Connection with
                          Substitutions and Repurchases.

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

            (b) Upon discovery by the Depositor, the Seller, the Servicer or the
Trustee that any Mortgage Loan does not constitute a "qualified mortgage" within
the meaning of section 860G(a)(3) of the Code, the party discovering such fact
shall promptly (and in any event within [five (5)] Business Days of discovery)
give written notice thereof to the other parties. In connection therewith, the
Trustee shall require the Seller, at the Seller's option, to either (i)
substitute, if the conditions in Section 2.03(c) with respect to substitutions
are satisfied, a Substitute Mortgage Loan for the affected Mortgage Loan, or
(ii) repurchase the affected Mortgage Loan within [90] days of such discovery in
the same manner as it would a Mortgage Loan for a breach of representation or
warranty made pursuant to Section 2.03. The Trustee shall reconvey to the Seller
the Mortgage Loan to be released pursuant hereto in the same manner, and on the
same terms, as it would a Mortgage Loan repurchased for breach of a
representation or warranty contained in Section 2.03.

            SECTION 2.06. Execution and Delivery of Certificates.

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

            SECTION 2.07. REMIC Matters.

            The Preliminary Statement sets forth the designations and "latest
possible maturity date" for federal income tax purposes of all interests created
hereby. The "Startup Day" for purposes of the REMIC Provisions shall be the
Closing Date.


                                     II-11
<PAGE>


            SECTION 2.08. Covenants of the Servicer.

            The Servicer hereby covenants to the Depositor and the Trustee as
follows:

            (a) the Servicer shall comply in the performance of its obligations
under this Agreement with all reasonable rules and requirements of the insurer
under each Required Insurance Policy; and

            (b) no written information, certificate of an officer, statement
furnished in writing or written report delivered to the Depositor, any affiliate
of the Depositor or the Trustee and prepared by the Servicer pursuant to this
Agreement will contain any untrue statement of a material fact or omit to state
a material fact necessary to make such information, certificate, statement or
report not misleading.

            SECTION 2.09. Subsequent Transfers.

            (a) Upon [five] Business Days prior written notice to the Trustee,
the Depositor, the Seller and the Trustee shall complete, execute and deliver a
Subsequent Transfer Agreement. Subject to the satisfaction of the conditions set
forth in Article II and paragraph (b) below and pursuant to the terms of the
related Subsequent Transfer Agreement, in consideration of the Trustee's
delivery on each Subsequent Transfer Date to or upon the order of the Seller of
all or a portion of the balance of funds in the Pre-Funding Accounts (net of
investment earnings), the Seller shall on each Subsequent Transfer Date sell,
transfer, assign, set over and otherwise convey to the Depositor, without
recourse, all the right, title and interest of the Seller in and to each
Subsequent Mortgage Loan listed on the Mortgage Loan Schedule delivered by the
Seller on such Subsequent Transfer Date, including all interest and principal
received or receivable by the Seller on or with respect to each Subsequent
Mortgage Loan after the related Cut-off Date and all interest and principal
payments on each Subsequent Mortgage Loan received prior to such related Cut-off
Date in respect of installments of interest and principal due thereafter, but
not including payments of principal and interest due and payable on each
Subsequent Mortgage Loan on or before such related Cut-off Date, and the
Depositor shall simultaneously sell, transfer, assign, set over and otherwise
convey to the Trustee for the benefit of the Certificateholders, without
recourse, all the right, title and interest of the Depositor in and to each
Subsequent Mortgage Loan listed on the Mortgage Loan Schedule delivered by the
Seller on such Subsequent Transfer Date, including all interest and principal
received or receivable by the Depositor on or with respect to each Subsequent
Mortgage Loan after the related Cut-off Date and all interest and principal
payments on each Subsequent Mortgage Loan received prior to such related Cut-off
Date in respect of installments of interest and principal due thereafter, but
not including payments of principal and interest due and payable on each
Subsequent Mortgage Loan on or before such related Cut-off Date.

            (b) If the assignment and transfer of the Subsequent Mortgage Loans
and the other property specified in this Section 2.09 from the Seller to the
Depositor pursuant to this Agreement is held or deemed not to be a sale or is
held or deemed to be a pledge of security for a loan, the Seller intends that
the rights and obligations of the parties shall be established pursuant to the
terms of this Agreement and that, in such event, (i) the Seller shall be deemed
to have granted and does hereby grant to the Depositor as of each Subsequent
Transfer Date a perfected,


                                     II-12
<PAGE>


first priority security interest in the entire right, title and interest of the
Seller in and to the related Subsequent Mortgage Loans and all other property
conveyed to the Depositor pursuant to this Section 2.09 and all proceeds
thereof, and (ii) this Agreement shall constitute a security agreement under
applicable law.

             (c) If the assignment and transfer of the Subsequent Mortgage Loans
and the other property specified in this Section 2.09 from the Depositor to the
Trustee pursuant to this Agreement is held or deemed not to be a sale or is held
or deemed to be a pledge of security for a loan, the Depositor intends that the
rights and obligations of the parties shall be established pursuant to the terms
of this Agreement and that, in such event, (i) the Depositor shall be deemed to
have granted and does hereby grant to the Trustee as of each Subsequent Transfer
Date a perfected, first priority security interest in the entire right, title
and interest of the Depositor in and to the related Subsequent Mortgage Loans
and all other property conveyed to the Trust Fund pursuant to this Section 2.09
and all proceeds thereof, and (ii) this Agreement shall constitute a security
agreement under applicable law.

            (d) The amount released from the Group 1 Pre-Funding Account by the
Trustee pursuant to this Section 2.09 shall be the aggregate Cut-off Date
Principal Balance of the Subsequent Mortgage Loans so transferred to Loan Group
1. The amount released from the Group 2 Pre-Funding Account by the Trustee
pursuant to this Section 2.09 shall be the aggregate Cut-off Date Principal
Balance of the Subsequent Mortgage Loans so transferred to Loan Group 2.

            (e) The Trustee shall contribute from the Pre-Funding Accounts funds
in an amount equal to the aggregate Cut-off Date Principal Balance of the
Subsequent Mortgage Loans so transferred to the Trust Fund to purchase the
Subsequent Mortgage Loans on behalf of the Trust Fund, along with the other
property and rights related thereto described in Section 2.09(a) hereof only
upon the satisfaction of each of the following conditions:

                  (i) the Trustee will be provided Opinions of Counsel addressed
            to the Rating Agencies with respect to the sale of the Subsequent
            Mortgage Loans conveyed on such Subsequent Transfer Date (such
             opinions being substantially similar to the opinions delivered on
            the Closing Date to the Rating Agencies with respect to the sale of
            the Initial Mortgage Loans on the Closing Date);

                  (ii) the execution and delivery of such Subsequent Transfer
            Agreement or conveyance of the related Subsequent Mortgage Loans
            does not result in a reduction or withdrawal of the any ratings
            assigned to the Certificates by the Ratings Agencies;

                   (iii) the Depositor shall deliver to the Trustee an Officer's
            Certificate confirming the satisfaction of each of the conditions
            set forth in Article II and this Section 2.09(b) required to be
            satisfied by such Subsequent Transfer Date;

                  (iv) each Subsequent Mortgage Loan conveyed on such Subsequent
            Transfer Date satisfies the representations and warranties
            applicable to it under this Agreement, provided, however, that with
            respect to a breach of a


                                     II-13
<PAGE>


            representation and warranty with respect to a Subsequent Mortgage
            Loan set forth in this clause (iv), the obligation under Section
            2.03(c) of this Agreement of the Seller to cure, repurchase or
            replace such Subsequent Mortgage Loan shall constitute the sole
            remedy against the Seller respecting such breach available to
            Certificateholders, the Depositor or the Trustee.

                  (v) the Subsequent Mortgage Loans conveyed on such Subsequent
            Transfer Date were selected in a manner reasonably believed not to
            be adverse to the interests of the Certificateholders;

                  (vi) no Subsequent Mortgage Loan conveyed on such Subsequent
            Transfer Date was [30] or more days delinquent;

                  (vii) each Subsequent Mortgage Loan conveyed on such
            Subsequent Transfer Date that is an Adjustable Rate Mortgage Loan is
            secured by a first lien on the related Mortgaged Property;

                  (viii) following the conveyance of the Subsequent Mortgage
            Loans on such Subsequent Transfer Date to the related Loan Group,
            the characteristics of such Loan Group listed below will not vary by
            more than the permitted variance listed below for each
            characteristic with respect to the Initial Mortgage Loans as set
            forth on the Mortgage Loan Schedule delivered on the Closing Date;
            provided that for the purpose of making such calculations, the
            characteristics for each Mortgage Loan made will be taken as of the
            related Cut-off Date for such Mortgage Loan:

      Loan Group 1:                                                Variation
         Loan Weighted Average Coupon:......................          [    %]
         Weighted Average Original Term to Maturity.........   [+/- 1 month]
         Weighted Average Original Loan-to-Value Ratio:.....          [    %]
         Weighted Average Combined Loan-to-Value Ratio......          [    %]
         Balloon Loans:.....................................          [    %]
         Maximum Principal Balance..........................    [$          ]
         State Concentration:...............................          [    %]
         Zip Code Concentration:............................          [    %]
         Non-Owner Occupied:................................          [    %]
         Second First Liens:................................          [    %]
         Manufactured Housing:..............................          [    %]

      Loan Group 2:                                                Variation
         Loan Weighted Average Coupon:......................          [    %]
         Weighted Average Original Maturity.................   [+/- 1 month]
         Weighted Average Original Loan-to-Value Ratio                [    %]
         Weighted Average Combined Loan-to-Value Ratio:.....          [    %]
         Performance Loans:.................................          [    %]
         Maximum Principal Balance..........................    [$          ]
         State Concentration:...............................          [    %]


                                     II-14
<PAGE>


         Zip Code Concentration:............................          [    %]
         Non-Owner Occupied:................................          [    %]
         First Liens:.......................................          [    %]
         Manufactured Housing:..............................          [    %]

                  (ix) neither the Seller nor the Depositor is insolvent and
            neither the Seller nor the Depositor will be rendered insolvent by
            the conveyance of Subsequent Mortgage Loans on such Subsequent
            Transfer Date;

                  (x) delivery to the Trustee of an Opinion of Counsel, which
            Opinion of Counsel shall not be at the expense of either the Trustee
            or the Trust Fund, addressed to the Trustee, to the effect that such
            purchase of Subsequent Mortgage Loans will not (i) result in the
            imposition of the tax on "prohibited transactions" on the Trust Fund
             or contributions after the Startup Date, as defined in Sections
            860F(a)(2) and 860G(d) of the Code, respectively or (ii) cause the
            Trust Fund to fail to qualify as a REMIC at any time that any
            Certificates are outstanding; and

                  (xi) delivery to the Trustee of the Mortgage File for each
            Subsequent Mortgage Loan to be transferred pursuant to the related
            Subsequent Transfer Agreement.

            The Trustee shall not be required to investigate or otherwise verify
compliance with these conditions, except for its own receipt of documents
specified above, and shall be entitled to rely on the required Officer's
Certificate.

            (f) In connection with each Subsequent Transfer Date and on the
related Distribution Date, the Seller shall determine (i) the amount and correct
dispositions of the funds distributed from the Capitalized Interest Accounts and
the Pre-Funding Accounts and (ii) any other necessary matters in connection with
the administration of the Capitalized Interest Accounts and the Pre-Funding
Accounts. In the event that any amounts are released by the Trustee from a
Pre-Funding Account or from a Capitalized Interest Account as a result of the
Seller's calculation error, the Trustee shall not be liable therefor, and the
Seller shall immediately repay such amounts to the Trustee.

            (g) Within five Business Days of the final Subsequent Transfer Date,
a letter addressed from an independent accountant retained by the Depositor
confirming that the characteristics of the Mortgage Loans, following the
acquisition of the related Subsequent Mortgage Loans, conform to the
characteristics identified in Section 2.09(d) will be addressed to and delivered
to the Trustee. If the characteristics of the Mortgage Loans do not conform to
these characteristics, within five Business Days of notice of this
non-conformity, the Seller shall purchase sufficient Subsequent Mortgage Loans
so that the characteristics of the Mortgage Loans conform to the characteristics
identified in Section 2.09(d).


                                     II-15
<PAGE>


            SECTION 2.10. Mandatory Prepayment.

            Any Unutilized Pre-Funding Amount shall be distributed to Holders of
the related Group of Certificates in accordance with Section 4.02 hereof on the
Distribution Date immediately following the Due Period in which the end of the
Pre-Funding Period occurs.


                                     II-16
<PAGE>


                                   ARTICLE III

                          ADMINISTRATION AND SERVICING
                                OF MORTGAGE LOANS

            SECTION 3.01. Servicer to Service Mortgage Loans.

            For and on behalf of the Certificateholders, the Servicer shall
service and administer the Mortgage Loans in accordance with the terms of this
Agreement and the Servicing Standard. In connection with such servicing and
administration, the Servicer shall have full power and authority, acting alone
to do or cause to be done any and all things that it may deem necessary or
desirable in connection with such servicing and administration, including but
not limited to, the power and authority, subject to the terms hereof, (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 (but only in the manner provided in this Agreement),
(iii) to collect any Insurance Proceeds and other Liquidation Proceeds, and (iv)
to effectuate foreclosure or other conversion of the ownership of the Mortgaged
Property securing any Mortgage Loan. The Servicer shall not make or permit any
modification, waiver or amendment of any term of any Mortgage Loan 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 Servicer, in its own name or in the name of any
Servicer or the Depositor and the Trustee, is hereby authorized and empowered by
the Depositor and the Trustee, when the Servicer or the Servicer, as the case
may be, believes it appropriate in its reasonable judgment, to execute and
deliver, on behalf of the Trustee, the Depositor, the Certificateholders or any
of them, any 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 held for the
benefit of the Certificateholders. The Servicer shall prepare and deliver to the
Depositor and/or the Trustee such documents requiring execution and delivery by
either or both of them as are necessary or appropriate to enable the Servicer to
service and administer the Mortgage Loans to the extent that the Servicer is not
permitted to execute and deliver such documents pursuant to the preceding
sentence. Upon receipt of such documents, the Depositor and/or the Trustee shall
execute such documents and deliver them to the Servicer.

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

            In accordance with and to the extent of the Servicing Standard, the
Servicer shall advance or cause to be advanced funds as necessary for the
purpose of effecting the payment of taxes and assessments on the Mortgaged
Properties, which advances shall be reimbursable in the


                                      III-1
<PAGE>


first instance from related collections from the Mortgagors pursuant to Section
3.07, and further as provided in Section 3.09. The costs incurred by the
Servicer, if any, in effecting the timely payments of taxes and assessments on
the Mortgaged Properties and related insurance premiums shall not, for the
purpose of calculating monthly distributions to the Certificateholders, be added
to the Stated Principal Balances of the related Mortgage Loans, notwithstanding
that the terms of such Mortgage Loans so permit.

            SECTION 3.02. [Reserved].

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

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

            SECTION 3.04. [Reserved].

            SECTION 3.05. Trustee to Act as Servicer.

            In the event that the Servicer shall for any reason no longer be the
Servicer hereunder (including because of an Event of Default or termination by
the Depositor), the Trustee or its successor shall thereupon assume all of the
rights and obligations of the Servicer hereunder arising thereafter (except that
the Trustee shall not be (i) liable for losses of the Servicer pursuant to
Section 3.10 or any acts or omissions of the predecessor Servicer hereunder),
(ii) obligated to make Advances if it is prohibited from doing so by applicable
law, (iii) obligated to effectuate repurchases or substitutions of Mortgage
Loans hereunder, including but not limited to repurchases or substitutions
pursuant to Section 2.02 or 2.03, (iv) responsible for expenses of the Servicer
pursuant to Section 2.03 or (v) deemed to have made any representations and
warranties of the Servicer hereunder. Any such assumption shall be subject to
Section 7.02.

            SECTION 3.06. Collection of Mortgage Loan Payments; Servicing
                          Accounts; Collection Account; Certificate Account;
                          Distribution Account; Pre-Funding Accounts;
                          Capitalized Interest Accounts.

            (a) In accordance with and to the extent of the Servicing Standard,
the Servicer shall make reasonable efforts in accordance with the customary and
usual standards of practice of prudent mortgage servicers to collect all
payments called for under the terms and provisions of the Mortgage Loans to the
extent such procedures shall be consistent with this Agreement and the terms and
provisions of any related Required Insurance Policy. Consistent


                                     III-2
<PAGE>


with the foregoing, the Servicer may in its discretion (i) waive any late
payment charge (ii) modify any delinquent or defaulted Mortgage Loan (including
modifications that change the Mortgage Rate, forgive the payment of principal or
interest or extend the final maturity date of that Mortgage Loan), provided such
modification is consistent with the Servicing Standard and if in the Servicer's
determination such modification is not materially adverse to the interests of
the Certificateholders (taking into account any estimated loss that might result
absent such action) and is expected to minimize the loss of such Mortgage Loan,
provided, however, that the Servicer shall not initiate new lending to such
mortgagor through the trust and (iii) extend the due dates for payments due on a
Mortgage Note for a period not greater than [125] days; provided, however, that
the Servicer cannot extend the maturity of any such Mortgage Loan past the date
on which the final payment is due on the latest maturing Mortgage Loan in the
applicable Loan Group as of the related Cut-off Date In the event of any such
arrangement, the Servicer shall make Advances on the related Mortgage Loan in
accordance with the provisions of Section 4.01 during the scheduled period in
accordance with the amortization schedule of such Mortgage Loan without
modification thereof by reason of such arrangements. The Servicer shall not be
required to institute or join in litigation with respect to collection of any
payment (whether under a Mortgage, Mortgage Note or otherwise or against any
public or governmental authority with respect to a taking or condemnation) if it
reasonably believes that enforcing the provision of the Mortgage or other
instrument pursuant to which such payment is required is prohibited by
applicable law. The Servicer shall not sell any delinquent or defaulted Mortgage
Loan.

            (b) The Servicer shall establish and maintain one or more Servicing
Accounts into which the Servicer shall deposit or cause to be deposited on a
daily basis within [one] Business Day of receipt, the following payments and
collections received by it in respect of Mortgage Loans subsequent to the
related Cut-off Date (other than in respect of principal and interest due on the
Mortgage Loans on or before the related Cut-off Date):

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

                  (ii) all payments on account of interest on the Mortgage
            Loans, net of the related Servicing Fee and, in cases where the
            Servicer maintains the Servicing Account, the related Servicer Fee;
            and

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

            On or before the Withdrawal Date in each calendar month, the
Servicer shall (a) withdraw (or cause to be withdrawn and remitted to the
Servicer) from the Servicing Account all amounts on deposit therein pursuant to
clauses (i) and (ii) above (other than amounts attributable to a Principal
Prepayment in Full) and (b) deposit such amounts in the Collection Account. On
or before the Business Day in each calendar month following the deposit in the
Servicing Account of amounts on deposit therein pursuant to clause (iii) above
or pursuant to any Principal Prepayment in Full, the Servicer shall (a) withdraw
(or cause to be withdrawn and remitted to the


                                     III-3
<PAGE>


Servicer) such amounts from the Servicing Account and (b) deposit such amounts
in the Collection Account.

            (c) The Servicer shall establish and maintain a Collection Account
into which the Servicer shall deposit, as and when required by paragraph (b) of
this Section 3.06, all amounts required to be deposited in the Collection
Account pursuant to that paragraph.

            (d) The Servicer shall establish and maintain a Certificate Account
into which the Servicer shall deposit or cause to be deposited on a daily basis
(i) within [one] Business Day of deposit in the Collection Account (in the case
of items (i) through (iii) below) and (2) within [one] Business Day of receipt
(in the case of all other items), except as otherwise specified herein, the
following payments and collections received by it in respect of Mortgage Loans
subsequent to the related Cut-off Date (other than in respect of principal and
interest due on the Mortgage Loans on or before the related Cut-off Date) and
the following amounts required to be deposited hereunder:

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

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

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

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

                        (v) any amounts required to be deposited by the Servicer
                  pursuant to Sections 3.12 and 3.14;

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

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

                        (viii) any other amounts required to be deposited
                  hereunder; and

                        (ix) all Prepayment Charges collected.

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


                                      III-4
<PAGE>


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

            (e) (i) The Trustee shall establish and maintain the Excess Reserve
Fund Account, on behalf of the Class X Certificateholders, to secure their
limited recourse obligation to pay to the Adjustable Rate Certificateholders
Basis Risk CarryForward Amounts.

            (ii) On the Closing Date, the Depositor shall deposit into the
      Excess Reserve Fund Account $[ ].

            (iii) On each Distribution Date, the Trustee shall deposit the
      amount of any Basis Risk Payment for such date into the Excess Reserve
      Fund Account.

            (iv) The Trustee shall invest amounts held in the Excess Reserve
      Fund Account only in Permitted Investments, which shall mature not later
      than the Business Day next preceding the next Distribution Date (except
      that if such Permitted Investment is an obligation of the institution that
      maintains such account, then such Permitted Investment shall mature not
      later than the next Distribution Date) and, in each case, shall not be
      sold or disposed of before its maturity. The Class X Certificateholder
      shall direct the Trustee in writing with respect to investment of amounts
      in the Excess Reserve Fund. In the absence of such written direction, all
       funds in the Excess Reserve Fund Account shall be invested by the Trustee
      in the [ ] Cash Reserve Fund.

            (f) (i) (A) On each Distribution Date the Required Reserve Fund
Deposit shall be deposited in the Excess Reserve Fund Account.

             (B) On each Distribution Date on which there exists a Basis Risk
      CarryForward Amount on any Class of Certificates, the Trustee shall
      withdraw from the Excess Reserve Fund Account amounts necessary to pay to
      such Class or Classes of Certificates the Basis Risk CarryForward Amount.
      Such payments shall be allocated to those Classes on a pro rata basis
      based upon the amount of Basis Risk CarryForward Amount owed to each such
      Class and shall be paid in the priority set forth in Section 4.02(iii)(i)
      hereof.

            (ii) The Trustee shall account for the Excess Reserve Fund Account
      as an outside reserve fund within the meaning of Treasury regulation
      1.860G-2(h) and not an asset of any REMIC created pursuant to this
      Agreement. The owner of


                                     III-5
<PAGE>

      the Excess Reserve Fund Account is the Class X Certificateholder. For all
      Federal tax purposes, amounts transferred by the Upper Tier REMIC to the
      Excess Reserve Fund Account shall be treated as distributions by the
      Trustee to the Class X Certificateholder.

            (iii) Any Basis Risk CarryForward Amounts paid by the Trustee to the
      Adjustable Rate Certificateholders shall be accounted for by the Trustee
      as amounts paid to the Holders of the Class X Certificate. In addition,
      the Trustee shall account for the Adjustable Rate Certificateholders
      rights to receive payments of Basis Risk CarryForward Amounts as rights in
      a limited recourse interest rate cap contract written by the Class X
      Certificateholders in favor of the Adjustable Rate Certificateholders.

            (iv) Notwithstanding any provision contained in this Agreement, the
      Trustee shall not be required to make any payments from the Excess Reserve
      Fund Account except as expressly set forth in this Section 3.06(f).

            (g) The Trustee shall establish and maintain the Distribution
Account on behalf of the Certificateholders. The Trustee shall, promptly upon
receipt, deposit in the Distribution Account and retain therein the following:

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

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

            (iii) any other amounts deposited hereunder which are required to be
      deposited in the Distribution Account.

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

            (h) (1) Each institution at which the Certificate Account or
Distribution Account is maintained shall invest the funds therein as directed in
writing by the Servicer in Permitted Investments, which shall mature not later
than (i) in the case of the Certificate Account, the [second] Business Day next
preceding the related Distribution Account Deposit Date (except that if such
Permitted Investment is an obligation of the institution that maintains such
account, then such Permitted Investment shall mature not later than the Business
Day next preceding such Distribution Account Deposit Date) and (ii) in the case
of the Distribution Account, the Business Day next preceding the Distribution
Date (except that if such Permitted Investment is an obligation of the
institution that maintains such account, then such Permitted


                                     III-6
<PAGE>


Investment shall mature not later than such Distribution Date) and, in each
case, shall not be sold or disposed of prior to its maturity. All such Permitted
Investments shall be made in the name of the Trustee, for the benefit of the
Certificateholders. All income and gain (net of any losses) realized from any
such investment of funds on deposit in the Certificate Account or the
Distribution Account shall be for the benefit of the Servicer as servicing
compensation and shall be remitted to it monthly as provided herein. The amount
of any realized losses in the Certificate Account or the Distribution Account
incurred in any such account in respect of any such investments shall promptly
be deposited by the Servicer in the Certificate Account or paid to the Trustee
for deposit into the Distribution Account, as applicable. The Trustee shall not
be liable for the amount of any loss incurred in respect of any investment or
lack of investment of funds held in the Certificate Account or the Distribution
Account and made in accordance with this Section 3.06.

            (2) The Trustee shall invest funds in the Capitalized Interest
Accounts or Pre-Funding Accounts as directed in writing by the Servicer in
Permitted Investments, which shall mature not later than the Business Day next
preceding the Distribution Date (except that if such Permitted Investment is an
obligation of the institution that maintains such account, then such Permitted
Investment shall mature not later than such Distribution Date) and, in each
case, shall not be sold or disposed of prior to its maturity. All such Permitted
Investments shall be made in the name of the Trustee, for the benefit of the
Certificateholders.

            (i) The Trustee shall establish and maintain, on behalf of the
Certificateholders, two separate accounts denominated the Group 1 Pre-Funding
Account and the Group 2 Pre-Funding Account in the name of the Trustee. Each of
the Pre-Funding Accounts shall be treated as an "outside reserve fund" under
applicable Treasury regulations and shall not be part of any REMIC. Any
investment earnings on the Pre-Funding Accounts shall be treated as owned by the
Seller and will be taxable to the Seller. The amount of any realized losses on
Permitted Investments in the Pre-Funding Account shall promptly be deposited by
Seller in the Pre-Funding Account. On the Closing Date the Seller shall remit $[
] to the Trustee for deposit in the Pre-Funding Accounts. The Trustee shall
allocate (i) $[ ] of the such amount to the Group 1 Pre-Funding Account for the
purchase of Subsequent Mortgage Loans to be included in Loan Group 1 and (ii) $[
] of the such amount to the Group 2 Pre-Funding Account for the purchase of
Subsequent Mortgage Loans to be included in Loan Group 2.

            The Trustee shall establish and maintain, on behalf of the
Certificateholders, two separate accounts denominated the Group 1 Capitalized
Interest Account and the Group 2 Capitalized Interest Account in the name of the
Trustee. Each of the Capitalized Interest Accounts shall be treated as an
"outside reserve fund" under applicable Treasury regulations and shall not be
part of the REMIC. Any investment earnings on the Capitalized Interest Accounts
shall be treated as owned by the Seller and will be taxable to the Seller. The
amount of any realized losses on Permitted Investments in the Capitalized
Interest Account shall promptly be deposited by the Seller in the Capitalized
Interest Account.

            On each Subsequent Transfer Date, upon satisfaction of the
conditions set forth in Section 2.09 hereof, the Trustee shall withdraw from the
related Pre-Funding Accounts an amount equal to [100]% of the aggregate of the
Cut-off Date Principal Balances of the


                                     III-7
<PAGE>


Subsequent Mortgage Loans sold to the Trust Fund for inclusion in Loan Group 1
or Loan Group 2, as the case may be, on such Subsequent Transfer Date and pay
such amount to or upon the order of the Seller.

            On the Business Day prior to the Distribution Date immediately
following the Remittance Period in which the Pre-Funding Period ends, the
Trustee shall (i) withdraw the Unutilized Pre-Funding Amount, if any, from each
of the Pre-Funding Accounts, (ii) promptly deposit each amount in the
Distribution Account and (iii) distribute each amount to the related Certificate
Group on such Distribution Date pursuant to Section 4.02 hereof.

            The amount deposited in the Distribution Account pursuant to the
preceding paragraph shall be net of any investment earnings on the amounts on
deposit in the Pre-Funding Accounts.

            On the Business Day prior to each Distribution Date, through the
Distribution Date immediately following the Remittance Period in which the
Pre-Funding Period ends, the Trustee shall transfer from each Capitalized
Interest Account to the Distribution Account the related Capitalized Interest
Requirement and shall distribute such amount to the related Certificate Group on
such Distribution Date pursuant to Section 4.02 hereof. To the extent that a
Capitalized Interest Requirement on any such Distribution Date exceeds the
amounts on deposit in the related Capitalized Interest Account, the Trustee
shall transfer to the Distribution Account, to the extent of such shortfall in
the Capitalized Interest Requirement, the investment earnings on the amounts on
deposit in the related Capitalized Interest Account and Pre-Funding Account. The
remaining investment earnings on deposit in the Capitalized Interest Account and
the Pre-Funding Account shall be transferred to the Seller.

            All amounts, if any, remaining in the Capitalized Interest Accounts
and any investment earnings remaining in the Pre-Funding Accounts on the
Distribution Date following the Remittance Period in which the Pre-Funding
Period ends shall be transferred to the Seller.

            (j) The Servicer shall give notice to the Trustee, the Seller, each
Rating Agency and the Depositor of any proposed change of the location of the
Certificate Account and the Collection Account not later than [30] days and not
more than [45] days prior to any change thereof.

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

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

            (b) Withdrawals of amounts so collected from the Escrow Accounts may
be made only to effect timely payment of taxes, assessments, hazard insurance
premiums, condominium or PUD association dues, or comparable items, to reimburse
(without duplication)


                                     III-8
<PAGE>


the Servicer out of related collections for any payments made pursuant to
Sections 3.12 (with respect to taxes and assessments and insurance premiums) and
3.13 (with respect to hazard insurance), to refund to any Mortgagors any sums
determined to be overages, to pay interest, if required by law or the terms of
the related Mortgage or Mortgage Note, to Mortgagors on balances in the Escrow
Account or to clear and terminate the Escrow Account at the termination of this
Agreement in accordance with Section 9.01. The Escrow Accounts shall not be a
part of the Trust Fund.

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

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

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

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

            SECTION 3.09. Permitted Withdrawals from the Certificate Account,
                          the Distribution Account and the Excess Reserve Fund
                           Account.

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

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

                  (ii) to reimburse the Servicer for unreimbursed Advances made
            by it, such right of reimbursement pursuant to this subclause (ii)
            being limited to


                                      III-9
<PAGE>


            amounts received on the Mortgage Loan(s) in respect of which such
            Advance was made;

                  (iii) to reimburse the Servicer for any Nonrecoverable Advance
            previously made;

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

                  (v) to reimburse the Servicer for (a) unreimbursed Servicing
            Advances, the Servicer's right to reimbursement pursuant to this
            clause (a) with respect to any Mortgage Loan being limited to
            amounts received on such Mortgage Loan(s) that represent late
            recoveries of the payments for which such advances were made
            pursuant to Section 3.01 or Section 3.07 and (b) for unpaid
            Servicing Fees as provided in Section 3.12;

                  (vi) to pay to the purchaser, with respect to each Mortgage
            Loan or property acquired in respect thereof that has been purchased
            pursuant to Section 2.02, 2.03 or 3.14, all amounts received thereon
            after the date of such purchase;

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

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

                  (ix) on or prior to the Distribution Account Deposit Date, to
            withdraw an amount equal to (1) the related Available Funds for both
            Loan Groups and the Trustee Fee for such Distribution Date, to the
            extent on deposit, and (2) the Prepayment Charges on deposit, and
            remit such amount to the Trustee for deposit in the Distribution
            Account; and

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

            The Servicer shall keep and maintain separate accounting, on a
Mortgage Loan by Mortgage Loan basis, for the purpose of justifying any
withdrawal from the Certificate Account pursuant to such subclauses (i), (ii),
(iv), (v) and (vi). Prior to making any withdrawal from the Certificate Account
pursuant to subclause (iii), the Servicer shall deliver to the Trustee an
Officer's Certificate of a Servicing Officer indicating the amount of any
previous Advance determined by the Servicer to be a Nonrecoverable Advance and
identifying the related Mortgage Loan(s) and their respective portions of such
Nonrecoverable Advance.

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


                                     III-10
<PAGE>


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

                  (ii) to pay to the Servicer as additional servicing
            compensation earnings on or investment income with respect to funds
            in the Distribution Account;

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

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

            (c) On each Distribution Date, the Trustee shall make withdrawals
from the Excess Reserve Fund Account for deposit in the Distribution Account an
amount equal to the amount required pursuant to Section 3.06(f) above. On the
earlier of (i) the Distribution Date on which all of the Adjustable Rate
Certificates


 
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