CREDIT SUISSE FIRST BOSTON MORTGAGE SECURITIES CORP
S-3/A, 2000-05-23
ASSET-BACKED SECURITIES
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The attached Registration Statement filed by Credit Suisse First Boston Mortgage
Securities  Corp. on May 23, 2000,  replaces the  Registration  Statement  filed
earlier on this date, which inadvertently suppressed the Form S-3 cover.


<PAGE>


As filed with the Securities and Exchange Commission on May 23, 2000

                                                     Registration No. 333-______
     ======================================================================
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                               ------------------
                                    FORM S-3
                             REGISTRATION STATEMENT
                                      under
                           THE SECURITIES ACT OF 1933
                               ------------------

              CREDIT SUISSE FIRST BOSTON MORTGAGE SECURITIES CORP.
             (Exact name of registrant as specified in its charter)
                                    DELAWARE
         (State or other jurisdiction of incorporation or organization)
                                   13-3320910
                     (I.R.S. employer identification number)
              Credit Suisse First Boston Mortgage Securities Corp.
                                11 Madison Avenue
                            New York, New York 10010
                                 (212) 325-2000
   (Address, including zip code, and telephone number, including area code, of
                    registrant's principle executive offices)

                                 Thomas Zingalli
              Credit Suisse First Boston Mortgage Securities Corp.
                                11 Madison Avenue
                            New York, New York 10010
                                 (212) 325-2000
       (Name, address, including zip code, and telephone number, including
                        area code, of agent for service)

                                   Copies to:
                            Katharine I. Crost, Esq.
                       Orrick, Herrington & Sutcliffe LLP
                                666 Fifth Avenue
                            New York, New York 10103
     Approximate date of commencement of proposed sale to the public:  From time
to time after this  Registration  Statement  becomes  effective as determined by
market conditions.
     If the only  securities  being  registered  on this Form are to be  offered
pursuant to dividend or interest  reinvestment plans, please check the following
box. |_|
     If any of the securities being registered on this Form are to be offered on
a delayed or continuous  basis  pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box. |X|
     If this Form is filed to  register  additional  securities  for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list  the  Securities  Act  Registration  Statement  number  of the  earlier
effective Registration Statement for the same offering. |_|
     If this Form is a  post-effective  amendment  filed pursuant to Rule 462(c)
under the  Securities  Act,  check the following box and list the Securities Act
Registration  Statement number of the earlier effective  Registration  Statement
for the same offering. |-|
     If delivery of the  prospectus is expected to be made pursuant to Rule 434,
please check the following box. |_|

                         CALCULATION OF REGISTRATION FEE
================================================================================
<TABLE>

  Title of Securities to be        Amount to be        Proposed Maximum       Proposed Maximum        Amount of
        Registered(1)               Registered        Aggregate Price Per    Aggregate Offering    Registration Fee
- - - - - - - - ------------------------------- -------------------- ---------------------- ---------------------- -----------------
<S>                                    <C>                   <C>                    <C>                  <C>

     Conduit Mortgage and
Manufactured Housing Contract       $1,000,000               100%               $1,000,000(2)            $264
  Pass-Through Certificates
</TABLE>

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

(1)  This   Registration   Statement  also  relates  to  certain  market  making
     transactions that may be made by Credit Suisse First Boston Corporation, an
     affiliate of the Registrant.

(2)  Estimated solely for the purpose of calculating the registration fee.

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


     The Registrant  hereby amends this  Registration  Statement on such date or
dates as may be necessary to delay its effective date until the Registrant shall
file a further  amendment  which  specifically  states  that  this  Registration
Statement shall  thereafter  become effective in accordance with Section 8(a) of
the Securities Act of 1933, or until this  Registration  Statement  shall become
effective on such date as the Commission,  acting pursuant to said Section 8(a),
may determine.






<PAGE>

                                Explanatory Note

     This Registration  Statement includes (i) the basic prospectus  relating to
Conduit Mortgage and Manufactured  Housing Contract  Pass-Through  Certificates,
and (ii) an illustrative form of prospectus supplement for use in an offering of
Mortgage  Asset-Backed   Pass-Through   Certificates   representing   beneficial
ownership interests in a trust fund consisting primarily of mortgage loans.







The  information  in  this  prospectus  supplement  is not  complete  and may be
changed. We may not sell these securities until the registration statement filed
with the Securities Exchange Commission is effective. This prospectus supplement
is not an offer to sell these  securities  and it is not  soliciting an offer to
buy these securities in any state where the offer or sale is not permitted.

                              SUBJECT TO COMPLETION
PRELIMINARY PROSPECTUS SUPPLEMENT DATED ________________, 200_
Prospectus supplement dated ________,_____ (to prospectus dated
_____________,____)

                                  $____________

                               [_________________]
                               SELLER AND SERVICER

                           CREDIT SUISSE FIRST BOSTON
                            MORTGAGE SECURITIES CORP.
                                    DEPOSITOR

           MORTGAGE-BACKED PASS-THROUGH CERTIFICATES, SERIES 200_-___
                                     ISSUER


THE TRUST

The trust will hold a pool of one- to  four-family  residential  first  mortgage
loans.

OFFERED CERTIFICATES

The trust will issue these classes of  certificates  that are offered under this
prospectus supplement:

     o  [_] classes of Class A Certificates

    [o  [_] classes of Class R Certificates]

     o  [_] classes of Class M Certificates

CREDIT ENHANCEMENT

Credit   enhancement  for  all  of  these   certificates  will  be  provided  by
subordinated certificates.


- - - - - - - - --------------------------------------------------------------------------------
YOU SHOULD CONSIDER CAREFULLY THE RISK FACTORS BEGINNING ON PAGE S-[_] IN THIS
PROSPECTUS SUPPLEMENT.
- - - - - - - - --------------------------------------------------------------------------------


NEITHER  THE  SECURITIES  AND  EXCHANGE  COMMISSION  NOR  ANY  STATE  SECURITIES
COMMISSION HAS APPROVED OR DISAPPROVED  THE OFFERED  CERTIFICATES  OR DETERMINED
THAT THIS PROSPECTUS  SUPPLEMENT OR THE PROSPECTUS IS ACCURATE OR COMPLETE.  ANY
REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

THE ATTORNEY GENERAL OF THE STATE OF NEW YORK HAS NOT PASSED ON OR ENDORSED THE
MERITS OF THIS OFFERING. ANY REPRESENTATION TO THE CONTRARY IS UNLAWFUL.

Credit  Suisse First  Boston  Corporation  will offer the Class A  Certificates,
Class M certificates [and Class R Certificates], subject to availability.

                              [NAME OF UNDERWRITER]

                                   UNDERWRITER

[_________], 200_


<PAGE>


         IMPORTANT NOTICE ABOUT INFORMATION PRESENTED IN THIS PROSPECTUS
                          SUPPLEMENT AND THE PROSPECTUS

     You should rely on the  information  contained in this document or to which
we have referred you to in this  prospectus  supplement.  We have not authorized
anyone to provide you with information that is different. This document may only
be used where it is legal to sell these securities.

     We  provide  information  to you  about  the  offered  certificates  in two
separate documents that progressively provide more detail:

     o    the prospectus, which provides general information,  some of which may
          not apply to your series of certificates; and

     o    this prospectus supplement, which describes the specific terms of your
          series of certificates.

     We  include   cross-references  in  this  prospectus   supplement  and  the
accompanying  prospectus  to  captions  in these  materials  where  you can find
further related discussions.

     You can find a listing of the pages  where  capitalized  terms used in this
prospectus  supplement are defined under the caption "Index of Terms"  beginning
on page 126 in the prospectus.

                                TABLE OF CONTENTS

                                  [INSERT HERE]


<PAGE>

                                     SUMMARY

The following  summary  highlights  selected  information  from this  prospectus
supplement. It does not contain all of the information that you should consider
in making  your  investment  decision.  To  understand  the terms of the offered
certificates,   read  carefully  this  entire  prospectus   supplement  and  the
accompanying prospectus.

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

Title of series...........[_________________________ Mortgage-Backed
                          Pass-Through Certificates, Series 200_-___].

Depositor.................Credit Suisse First Boston Mortgage Securities Corp.

Seller and servicer.......[_________________________].

Trustee...................[_________________________].

Mortgag pool..............[_____] [fixed]  [adjustable] rate mortgage loans
                          with an aggregate  principal  balance of approximately
                          $[________]  as of the cut-off date,  secured by first
                          liens on one- to four-family residential properties.

Cut-off date..............[__________ 1, 200_].

Closing date..............On or about [_________, 200_].

Distribution date.........Beginning on [__________,  200_], and thereafter
                          on the [ ] day of each month, or if the [ ] day is not
                          a business day, on the next business day.

Scheduled final
 distribution date........[__________, 20__]. The actual
                          final   distribution   date  could  be   substantially
                          earlier.

Form of offered
 certificates............ Book-entry: Class A Certificates and Class M
                          Certificates.
                          Physical: Class R Certificates.
                          SEE   "DESCRIPTION  OF  THE   CERTIFICATES--BOOK-ENTRY
                          REGISTRATION" IN THIS PROSPECTUS SUPPLEMENT.

Minimum denominations.....[Class A Certificates and Class M Certificates]:
                          $25,000. Class R-1 and Class R-2 Certificates: [    ]%
                          percentage interests.



                                      S-3
<PAGE>


- - - - - - - - --------------------------------------------------------------------------------
                              OFFERED CERTIFICATES
- - - - - - - - --------------------------------------------------------------------------------
<TABLE>
                                   INITIAL
                     INITIAL       PASS-            INITIAL
                     PRINCIPAL     THROUGH          RATING
     CLASS           BALANCE       RATE             (____/____)    DESIGNATION
- - - - - - - - --------------------------------------------------------------------------------
<S>   <C>         <C>           <C>        <C>           <C>

CLASS A CERTIFICATES:
- - - - - - - - --------------------------------------------------------------------------------
                     $                %             Aaa/AAA        Senior
- - - - - - - - --------------------------------------------------------------------------------
                     $                %             Aaa/AAA        Senior
- - - - - - - - --------------------------------------------------------------------------------
Total Class A
Offered
Certificates:       $
- - - - - - - - --------------------------------------------------------------------------------

[CLASS R CERTIFICATES:
- - - - - - - - --------------------------------------------------------------------------------
      R-1           $                 %             NA/AAA     Senior/Residual
- - - - - - - - --------------------------------------------------------------------------------
      R-2           $                 %             NA/AAA     Senior/Residual
- - - - - - - - --------------------------------------------------------------------------------
Total Class R
Certificates:       $   ]
- - - - - - - - --------------------------------------------------------------------------------

CLASS M CERTIFICATES:
- - - - - - - - --------------------------------------------------------------------------------
                    $                 %            NA/AA        Mezzanine
- - - - - - - - --------------------------------------------------------------------------------
Total Class M
Certificates:       $
- - - - - - - - --------------------------------------------------------------------------------
Total offered
certificates:       $
- - - - - - - - --------------------------------------------------------------------------------
</TABLE>




                                      S-4
<PAGE>


THE TRUST

The depositor  will  establish a trust for the Series  200_-___  Mortgage-Backed
Pass-Through Certificates,  under a pooling and servicing agreement, dated as of
[_______]  1,  200_,   among  the   depositor,   the  seller  and  servicer  and
[______________],  as trustee.  On the closing date,  the depositor will deposit
the pool of mortgage loans described in this prospectus into the trust.

Each  certificate  will  represent  a partial  ownership  interest in the trust.
Distributions  on the  certificates  will be made from payments  received on the
mortgage loans as described in this prospectus.

THE MORTGAGE POOL

The mortgage  pool will consist of  approximately  [____]  [fixed]  [adjustable]
rate,  fully  amortizing  mortgage  loans  secured  by  first  liens  on  one-to
four-family  residential  properties  having an aggregate  principal  balance of
approximately $_______ as of __________ 1, 200_ .]

FOR ADDITIONAL  INFORMATION  REGARDING THE MORTGAGE POOL SEE "DESCRIPTION OF THE
MORTGAGE POOL" IN THIS PROSPECTUS SUPPLEMENT.

DISTRIBUTIONS ON THE OFFERED CERTIFICATES

AMOUNT AVAILABLE FOR MONTHLY  DISTRIBUTION.  On each monthly  distribution date,
the trustee will make  distributions  to  investors.  The amount  available  for
distribution will include:

o    collections  of  monthly   payments  on  the  mortgage   loans,   including
     prepayments and other unscheduled collections PLUS

o    advances for delinquent payments MINUS

o    the fees and  expenses  of the  subservicers  and the  servicer,  including
     reimbursement for advances.

SEE "DESCRIPTION OF THE CERTIFICATES--GLOSSARY OF TERMS--AVAILABLE  DISTRIBUTION
AMOUNT" IN THIS PROSPECTUS SUPPLEMENT.

PRIORITY OF  DISTRIBUTIONS.  Distributions on the offered  certificates  will be
made from available amounts as follows:

o    Distribution of interest to the interest-bearing  [Class A Certificates and
     Class R Certificates]

o    Distribution of principal to the remaining  [Class A Certificates and Class
     R Certificates] entitled to principal

o    Payment to servicer for various unreimbursed advances

Distribution to the Class M Certificates in the following order:

o    Interest to the Class M Certificates

o    Principal to the Class M Certificates

INTEREST  DISTRIBUTIONS.  The amount of interest  owed to each class of interest
bearing certificates on each distribution date will equal:

o    the  pass-through  rates  set  forth  on  page  S-[_]  for  that  class  of
     certificates MULTIPLIED BY

o    the  principal  balance  of  that  class  of  certificates  as of  the  day
     immediately  prior to the related  distribution date MULTIPLIED BY
/
o    1/12th MINUS

o    the share of some types of interest shortfalls allocated to that class.



                                      S-5
<PAGE>

SEE "DESCRIPTION OF THE CERTIFICATES--INTEREST DISTRIBUTIONS" IN THIS PROSPECTUS
SUPPLEMENT.

It is possible that, on any given  distribution date, there will be insufficient
payments from the mortgage loans to cover interest owed on the certificates.  As
a result, some certificates,  most likely the subordinate certificates,  may not
receive the full amount of accrued interest to which they are entitled.  If this
happens,  those  certificates  will be  entitled  to receive  any  shortfall  in
interest  distributions  in the  following  month in the same  priority as their
distribution of current interest.  However, there will be no extra interest paid
to make up for the delay.

ALLOCATIONS OF PRINCIPAL.  Principal  distributions on the certificates  will be
allocated among the various classes of offered certificates as described in this
prospectus supplement.  It is possible that on any distribution date, there will
be insufficient payments from the mortgage loans to make principal distributions
on the  certificates.  As a result,  some  certificates may not receive the full
amount of principal distributions to which they are entitled.

Until  the  distribution  date in  [__________]  200_,  all  prepayments  on the
mortgage  loans will be  distributed  to the [Class A  Certificates  and Class R
Certificates],  unless the principal  balances of those  certificates  have been
reduced to zero.

In  addition,  unscheduled  collections  of  principal  relating  to the Class M
Certificates and Class B Certificates will be paid to the most senior classes of
the  Class  M  Certificates  and  Class  B  certificates  as  described  in this
prospectus supplement.

SEE "DESCRIPTION OF THE  CERTIFICATES--PRINCIPAL  DISTRIBUTIONS" AND "--PRIORITY
OF DISTRIBUTIONS" IN THIS PROSPECTUS SUPPLEMENT.

CREDIT ENHANCEMENT

ALLOCATION  OF LOSSES.  Most losses on the  mortgage  loans will be allocated in
full to the first class listed below with a principal balance greater than zero:

o     Class B Certificates
o     Class M Certificates

When  this  occurs,  the  principal  balance  of the  class to which the loss is
allocated is reduced without a corresponding payment of principal.

If none of the Class M  Certificates  or Class B Certificates  are  outstanding,
losses on the mortgage loans will be allocated  proportionately among the senior
certificates.

SEE "DESCRIPTION OF THE  CERTIFICATES--ALLOCATION  OF LOSSES;  SUBORDINATION" IN
THIS PROSPECTUS SUPPLEMENT.

PRIORITY OF DISTRIBUTIONS

All or a  disproportionately  large portion of principal  prepayments  and other
unscheduled  payments of principal will be allocated to the senior certificates.
This provides  additional  credit  enhancement  for the senior  certificates  by
preserving  the  principal  balances  of the  Class M  certificates  and Class B
certificates for absorption of losses.

YIELD CONSIDERATIONS

The yield to maturity of each class of certificates  will depend on, among other
things:

o    the price at which the certificates are purchased;




                                      S-6
<PAGE>

o    the applicable pass-through rate; and

o    the rate of prepayments on the related mortgage loans.

FOR A  DISCUSSION  OF SPECIAL  YIELD  CONSIDERATIONS  APPLICABLE  TO THE OFFERED
CERTIFICATES,   SEE  "RISK   FACTORS"   AND   "SPECIAL   YIELD  AND   PREPAYMENT
CONSIDERATIONS" IN THIS PROSPECTUS SUPPLEMENT.

ADVANCES

For any month, if the servicer does not receive the full scheduled  payment on a
mortgage  loan,  the  servicer  will  advance  funds to cover the  amount of the
scheduled  payment that was not made.  However,  the servicer will advance funds
only if it determines that the advance will be recoverable  from future payments
or collections on that mortgage loan.

SEE "DESCRIPTION OF THE CERTIFICATES--ADVANCES" IN THIS PROSPECTUS SUPPLEMENT.

OPTIONAL TERMINATION

On any distribution  date on which the principal  balances of the mortgage loans
is less  than  10% of their  principal  balances  as of the  cut-off  date,  the
servicer will have the option to purchase from the trust all remaining  mortgage
loans, causing an early retirement of the certificates.

Early  retirement  of the  certificates  may  cause the  holders  of one or more
classes of certificates to receive less than their outstanding principal balance
plus the accrued interest.

SEE "THE POOLING AND SERVICING AGREEMENT--TERMINATION; RETIREMENT OF
CERTIFICATES" IN THE PROSPECTUS.

TAX STATUS

For federal income tax purposes,  the depositor will elect to treat the trust as
[two] real estate mortgage investment conduits. The certificates, other than the
Class R Certificates, will represent ownership of regular interests in the trust
and will be treated as  representing  ownership  of debt for federal  income tax
purposes.  You will be required to include as income all  interest  and original
issue  discount,  if any, on the  certificates  in  accordance  with the accrual
method of accounting regardless of your usual methods of accounting. For federal
income tax purposes,  each of the Class R Certificates will be the sole residual
interest in one of the two real estate mortgage investment conduits.

FOR  FURTHER  INFORMATION  REGARDING  THE  FEDERAL  INCOME TAX  CONSEQUENCES  OF
INVESTING IN THE OFFERED CERTIFICATES,  SEE "FEDERAL INCOME TAX CONSEQUENCES" IN
THIS PROSPECTUS SUPPLEMENT AND IN THE PROSPECTUS.

ERISA CONSIDERATIONS

The [Class A  Certificates]  may be considered  eligible for purchase by persons
investing  assets of employee benefit plans or individual  retirement  accounts.
Sales of the  Class M  Certificates  to these  plans  or  individual  retirement
accounts may be prohibited. Sales of the Class R Certificates to these plans and
retirement  accounts are prohibited.  Persons investing assets of those plans or
accounts should consult with their counsel before purchasing the notes.

SEE "ERISA CONSIDERATIONS" IN THIS PROSPECTUS SUPPLEMENT AND IN THE PROSPECTUS.

LEGAL INVESTMENT

When issued,  the [Class A Certificates and Class R Certificates]  will, and the
[Class M


                                      S-7
<PAGE>



Certificates]  will not, be "mortgage  related  securities"  for purposes of the
Secondary  Mortgage Market  Enhancement Act of 1984 or SMMEA. You should consult
your legal  advisors  in  determining  whether  and to what  extent the  offered
certificates constitute legal investments for you.

SEE "LEGAL INVESTMENT" IN THIS PROSPECTUS SUPPLEMENT FOR IMPORTANT INFORMATION
CONCERNING  POSSIBLE  RESTRICTIONS  ON OWNERSHIP OF THE OFFERED  CERTIFICATES BY
REGULATED INSTITUTIONS.

RATINGS

When issued,  the offered  certificates will receive ratings which are not lower
than those listed in the table on page S-[__] of this prospectus supplement. The
ratings on the offered  certificates  address the likelihood that the holders of
the offered  certificates  will  receive  all  distributions  on the  underlying
mortgage  loans  to  which  they  are  entitled.  A  security  rating  is  not a
recommendation  to buy,  sell or hold a security and may be changed or withdrawn
at any time by the assigning rating agency.  The ratings also do not address the
rate of principal  prepayments on the mortgage loans.  For example,  the rate of
prepayments,  if different than originally  anticipated,  could adversely affect
the yield realized by holders of the offered certificates.

SEE "RATINGS" IN THIS PROSPECTUS SUPPLEMENT.



                                      S-8
<PAGE>


                                  RISK FACTORS

     The offered certificates are not suitable investments for all investors. In
particular, you should not purchase any class of offered certificates unless you
understand the prepayment,  credit,  liquidity and market risks  associated with
that class.

     The offered certificates are complex securities. You should possess, either
alone or  together  with an  investment  advisor,  the  expertise  necessary  to
evaluate  the  information  contained  in  this  prospectus  supplement  and the
prospectus in the context of your financial situation and tolerance for risk.

     You should carefully consider, among other things, the following factors in
connection with the purchase of the offered certificates:

RISK OF LOSS

THE  UNDERWRITING  STANDARDS FOR THE MORTGAGE LOANS CREATE GREATER RISKS TO YOU.
[____]%  of  the  mortgage  loans  included  in  the  mortgage  loan  pool  were
underwritten  using  standards  that  are  standards  less  stringent  than  the
underwriting standards applied for the by other mortgage loan purchase programs,
such as mortgage Fannie Mae or Freddie Mac. Applying less stringent underwriting
standards  creates  additional  risks that greater  losses on the mortgage loans
will be allocated to certificateholders.

          Examples include:

          o    mortgage loans with original  principal  balances of greater than
               $1,000,000;

          o    mortgage loans secured by non-owner occupied properties;

          o    mortgage  loans made to  borrowers  who have high  debt-to-income
               ratios (i.e., a large portion of the borrower's income is used to
               make payments on other debt); and

          o    mortgage loans made to borrowers whose income was not required to
               be disclosed or verified.

          SEE  "DESCRIPTION  OF THE MORTGAGE  POOL--UNDERWRITING  STANDARDS" AND
          "CERTAIN  LEGAL  ASPECTS  OF  MORTGAGE  LOANS  AND  CONTRACTS"  IN THE
          PROSPECTUS.





                                      S-9
<PAGE>


THE RETURN ON YOUR CERTIFICATES MAY BE PARTICULARLY SENSITIVE TO CHANGES IN REAL
ESTATE  MARKETS IN SPECIFIC  AREAS.  One risk of  investing  in  mortgage-backed
securities is created by any  concentration of the related  properties in one or
more  geographic  regions.  Approximately  [ ]% of the  cut-off  date  principal
balance of the  mortgage  loans are located in the State of  [___________].  [No
more than [____]% of the cut-off date  principal  balance of the mortgage  loans
are  located  in any  one zip  code in the  State  of  [____________  ].] If the
regional economy or housing market in the state of [___________]  weakens, or in
any other region having a significant concentration of properties underlying the
mortgage  loans,  the mortgage loans in that region may experience high rates of
loss and  delinquency,  resulting  in losses to  certificateholders.  A region's
economic  condition and housing market may be adversely affected by a variety of
events,   including  a  downturn  in  various  industries  or  other  businesses
concentrated in the region,  natural  disasters such as earthquakes,  hurricanes
and floods, and civil disturbances including riots. The depositor cannot predict
whether, or to what extent or for how long, these events may occur.

          SEE  "DESCRIPTION  OF THE MORTGAGE  POOL--GENERAL"  IN THIS PROSPECTUS
          SUPPLEMENT.



THE RETURN ON YOUR  CERTIFICATES  WILL BE  REDUCED  IF LOSSES  EXCEED THE CREDIT
ENHANCEMENT AVAILABLE TO YOUR CERTIFICATES.  The only credit enhancement for the
senior  certificates  will  be  the  subordination   provided  by  the  Class  M
Certificates and Class B Certificates. The only credit enhancement for the Class
M  Certificates  will  be the  subordination  provided  by the  Class  B  losses
Certificates.  If the aggregate  principal balance of the e Class B certificates
is reduced to zero,  losses will be allocated to the Class M certificates  until
the principal balance of the Class M Certificates has been reduced to zero.

          SEE   "SUMMARY--CREDIT    ENHANCEMENT"   AND   "DESCRIPTION   OF   THE
          CERTIFICATES--ALLOCATION OF LOSSES;  SUBORDINATION" IN THIS PROSPECTUS
          SUPPLEMENT.


LIMITED OBLIGATIONS

PAYMENTS  ON THE  MORTGAGE  LOANS  ARE  THE  ONLY  SOURCE  OF  PAYMENTS  ON YOUR
CERTIFICATES.  The  certificates  represent  interests  only in the  trust.  The
certificates do not represent an interest in or obligation of the depositor, the
servicer,  the seller or any of their  affiliates.  None of the  depositor,  the
servicer  or any of their  affiliates  will have any  obligation  to  replace or
supplement the credit  enhancement,  or to take any other action to maintain any
rating of the  certificates.  If  proceeds  from the assets of the trust are not
sufficient  to make all payments  provided  for under the pooling and  servicing
agreement,  investors will have no recourse to the depositor,  the servicer, the
seller or any other entity, and will incur the losses.




                                      S-10
<PAGE>

LIQUIDITY RISKS

YOU MAY HAVE TO HOLD YOUR  CERTIFICATES  TO MATURITY IF THEIR  MARKETABILITY  IS
LIMITED. A secondary market for the offered  certificates may not develop.  Even
if a secondary  market does develop,  it may not continue or it may be illiquid.
Neither the  underwriter nor any other person will have any obligation to make a
secondary market in your certificates.  Illiquidity means you may not be able to
find a buyer to buy your securities readily or at prices that will enable you to
realize a desired  yield.  Illiquidity  can have a severe  adverse effect on the
market value of your certificates.

Any class of offered certificates may experience illiquidity, although typically
illiquidity  is more  likely  for  classes  that  are  especially  sensitive  to
prepayment,  credit or interest rate risk, or that have been  structured to meet
the investment requirements of limited categories of investors.


SPECIAL YIELD AND PREPAYMENT  CONSIDERATIONS

THE YIELD TO  MATURITY  ON YOUR  CERTIFICATES  WILL  DEPEND ON VARIOUS  FACTORS,
INCLUDING  THE RATE OF  PREPAYMENTS.  The  yield to  maturity  on each  class of
offered certificates will depend on a variety of factors, including:

     o    the rate and  timing of  Principal  payments  on the  mortgage  loans,
          including  prepayments,   defaults  and  factors,   liquidations,  and
          repurchases due to breaches of representations or warranties;

     o    interest shortfalls due to mortgagor prepayments; and

     o    the purchase price of that class.

     The rate of prepayments is one of the most important and least  predictable
     of these factors.

     In  general,  if you  purchase a  certificate  at a price  higher  than its
     outstanding   principal   balance  and  principal   distributions  on  your
     certificate  occur  faster than you assumed at the time of  purchase,  your
     yield  will be lower  than  you  anticipated.  On the  other  hand,  if you
     purchase a  certificate  at a price  lower than its  outstanding  principal
     balance and  principal  distributions  on that class occur more slowly than
     you  assumed  at the time of  purchase,  your  yield will be lower than you
     anticipated.





                                      S-11
<PAGE>

THE RATE OF  PREPAYMENTS  ON THE  MORTGAGE  LOANS WILL VARY  DEPENDING ON FUTURE
MARKET  CONDITIONS AND OTHER FACTORS.  Because  mortgagors can typically  prepay
their mortgage loans at any time, the rate and timing of principal distributions
on the  offered  certificates  are  highly  uncertain.  Typically,  when  market
interest  rates  increase,  borrowers  are less likely to prepay their  mortgage
loans.  This could result in a slower  return of principal to you at a time when
you might have been able to  reinvest  your funds at a higher  rate of  interest
than the  pass-through  rate on your class of  certificates.  On the other hand,
when market  interest  rates  decrease,  borrowers are typically  more likely to
prepay their mortgage  loans.  This could result in a faster return of principal
to you at a time  when  you  might  not be able to  reinvest  your  funds  at an
interest rate as high as the pass-through rate on your class of certificates.

[____]% of the mortgage loans provide for a prepayment  penalty if the mortgagor
prepays  the  mortgage  loan.  Prepayment  penalties  may  reduce  the  rate  of
prepayment  on the  mortgage  loans until the end of the period  during  which a
prepayment penalty applies.

SEE "MATURITY AND PREPAYMENT CONSIDERATIONS" IN THE PROSPECTUS.

THE YIELD ON YOUR CERTIFICATES WILL BE AFFECTED BY THE SPECIFIC  CHARACTERISTICS
THAT APPLY TO THAT CLASS,  DISCUSSED  BELOW.  The offered  certificates  of each
class have different yield  considerations  and different  sensitivities  to the
rate  and  timing  of  principal  distributions.  The  following  is  a  general
discussion of some yield  considerations  and prepayment  sensitivities  of each
class.

SEE "CERTAIN YIELD AND PREPAYMENT CONSIDERATIONS" IN THIS PROSPECTUS SUPPLEMENT.

CLASS A CERTIFICATES. The Class A Certificates are subject to various priorities
for payment of principal. Distributions of principal on the Class A Certificates
with an earlier  priority of payment will be affected by the rates and timing of
prepayment of the mortgage loans early in the life of the mortgage pool.

CLASS M  CERTIFICATES.  Losses on the mortgage loans will be allocated among the
certificates in the manner described in this prospectus supplement. The yield to
investors in the Class M  Certificates  will be sensitive to the rate and timing
of losses on the mortgage  loans, if those losses are not covered by the Class B
Certificates.

SEE "SUMMARY--CREDIT  ENHANCEMENT--ALLOCATION OF LOSSES" AND "DESCRIPTION OF THE
CERTIFICATES--ALLOCATION   OF   LOSSES;   SUBORDINATION"   IN  THIS   PROSPECTUS
SUPPLEMENT.



                                      S-12
<PAGE>

It is not expected that the Class M Certificates  will receive any distributions
of principal prepayments until the distribution date in [__________] 200_. After
that date, a large portion of principal prepayments on the mortgage loans may be
allocated to the senior certificates,  and none or a relatively small portion of
principal prepayments may be paid to the holders of the Class M Certificates and
Class B Certificates.  [As a result,  the weighted  average lives of the Class M
Certificates may be longer than would otherwise be the case.]


RISK OF CERTAIN SHORTFALLS

RECEIVERSHIP  BY THE FDIC OF THE SERVICER  COULD CREATE GREATER RISKS TO YOU. If
seller's transfer of the mortgage loans to the depositor is deemed to constitute
the creation of a security  interest in the  mortgage  loans and to the servicer
extent  the  security  interest  was  validly  perfected  [before  the  seller's
insolvency and was not taken in  contemplation  of insolvency of the seller,  or
with the intent to hinder,  delay or defraud the seller or the  creditors of the
seller],  the  Federal  Deposit  Insurance  Act or FDIA,  as  amended by FIRREA,
provides  that the security  interest  should not be subject to avoidance by the
FDIC.  If the FDIC cannot avoid a legally  enforceable  and  perfected  security
interest,  it may repudiate  the security  interest.  If the FDIC  repudiates an
unavoidable security interest,  it could be liable for statutory damages.  These
damages are typically limited to actual compensatory damages.

In  addition,  the  FDIC,  would  also have the  power to  repudiate  contracts,
including the seller's  obligations under the pooling and servicing agreement to
repurchase  mortgage loans which do not conform to the seller's  representations
and  warranties.  The  non-conforming  mortgage  loans could suffer losses which
could result in losses on the certificates.

In addition,  in the case of an event of default  relating to the  receivership,
conservatorship  or insolvency of the servicer,  the receiver or conservator may
terminate  the  servicer  and  replace  it  with  a  successor   servicer.   Any
interference  with the termination of the servicer or appointment of a successor
servicer could result in a delay in payments to the certificateholders.

THE LACK OF  PHYSICAL  CERTIFICATES  MAY  CAUSE  DELAYS  IN  PAYMENT  AND  CAUSE
DIFFICULTY IN PLEDGING OR SELLING OFFERED CERTIFICATES. The Class A Certificates
and Class M  Certificates  will  physical not be issued in physical  form.  As a
result,  certificateholders  will be able to transfer  certificates only through
DTC   and   its   participants   or   indirect   participants.    In   addition,
certificateholders may experience some delay in receiving distributions on these
certificates  because the trustee will send all distributions to DTC, which will
then  credit  those  distributions  to the  participating  organizations.  Those
organizations  will in  turn  credit  accounts  certificateholders  have  either
directly or indirectly through indirect participants.

SEE "DESCRIPTION OF THE  CERTIFICATES--REGISTRATION OF THE OFFERED CERTIFICATES"
IN THIS PROSPECTUS SUPPLEMENT.



                                      S-13
<PAGE>



                                  INTRODUCTION

     Credit Suisse First Boston Mortgage Securities Corp. will establish a trust
for [____________________]  Mortgage-Backed  Pass-Through  Certificates,  Series
200_-____ on the closing date, under a pooling and servicing agreement among the
depositor,  [_________________],  as servicer  and  [_____________________],  as
trustee,  dated as of [_______ 1, 200_]. On the closing date, the depositor will
deposit into the trust a pool of mortgage  loans secured by one- to  four-family
residential properties with terms to maturity of not more than [__] years.

     Some capitalized terms used in this prospectus supplement have the meanings
given below under "Description of the Certificates--Glossary of Terms" or in the
prospectus under "Glossary."

                        DESCRIPTION OF THE MORTGAGE POOL

GENERAL

     The mortgage pool will consist of approximately  [____] mortgage loans with
an  aggregate  principal  balance  outstanding  as of the  cut-off  date,  after
deducting  payments  of  principal  due  on  or  before  the  cut-off  date,  of
approximately $[________].  The mortgage loans are secured by first liens on fee
simple or leasehold interests in one- to four-family residential real properties
with terms to  maturity  of not more than [__]  years.  The  mortgage  pool will
consist of conventional,  [fixed] [adjustable] rate, [fully-amortizing],  [level
monthly payment] mortgage loans. All percentages of the mortgage loans described
in this prospectus supplement are approximate percentages by aggregate principal
balance as of the cut-off date unless otherwise indicated.

     The  mortgage  loans will be purchased  by the  depositor  from the seller.
[___]% of the mortgage  loans were either  originated or purchased by the seller
in the normal course of its business. [[___]%, [___]% and [___]% of the mortgage
loans   were    originated    by   or   purchased    by    ____________________,
_____________________ and ________________________], respectively.

     [___]%,  [___]%,  [___]% and [___]% of the  mortgage  loans are  secured by
mortgaged properties in the states of [_________], [_________], [__________] and
[________],  respectively. Less than [___]% of the mortgage loans are secured by
mortgaged  properties  in any other  single  state.  No more than  [___]% of the
mortgage loans are secured by mortgaged properties in any single zip code.

     Except for  approximately  [___]% of the mortgage loans, each mortgage loan
at the time of  origination  was  represented  by the  related  mortgagor  to be
owner-occupied.

     The  mortgage  loans may be prepaid by the  mortgagors  at any time without
payment of any  prepayment  fee or  penalty[,  except for [___]% of the mortgage
loans,  which  provide  for payment of a  prepayment  penalty.  This  prepayment
penalty may discourage  mortgagors  from prepaying  their  mortgage  loans.  The
prepayment penalty is calculated as a percentage of the original loan amount and
declines each year. The prepayment penalty is only charged for



                                      S-14
<PAGE>

mortgage  loans paid in full.  The  prepayment  penalty only applies  during the
first three years of the mortgage loan term].

     As of the cut-off date, not more than [__]% of the mortgage loans were more
than 30 days delinquent in payments of principal and interest.

     As of the cut-off date,  not more than [__]% of the mortgage  loans provide
for deferred interest or negative amortization.

MORTGAGE LOAN POOL  CHARACTERISTICS.  The mortgage loans will have the following
characteristics:

     o    The mortgage  loans  consist of [____] fixed rate  mortgage  loans and
          [____] adjustable rate mortgage loans.

     o    The  mortgage  loans  have an  aggregate  principal  balance as of the
          cut-off date of $[__________].

     o    The mortgage loans had individual principal balances as of the cut-off
          date of at least $[________] but not more than  $[_________],  with an
          average  principal  balance as of the  cut-off  date of  approximately
          $[________].

     o    The  mortgage  loans  have  original  terms  to  stated   maturity  of
          approximately [__] years.

     o    The mortgage  loans have a weighted  average  remaining term to stated
          maturity of approximately [___] months as of the cut-off date.

     o    As of the cut-off date, the fixed rate mortgage loans bore interest at
          mortgage  rates of at least  [___]% per annum but no more than  [___]%
          per annum,  with a weighted  average  mortgage  rate of  approximately
          [___]% per annum.

     o    As of the  cut-off  date,  the  adjustable  rate  mortgage  loans bore
          interest at mortgage  rates of at least [____]% per annum but not more
          than  [____]%  per annum,  with a weighted  average  mortgage  rate of
          approximately  [____]% per annum.  The maximum  interest  rates ranged
          from [____]% per annum to [____]% per annum,  with a weighted  average
          maximum rate of [____]% per annum,  the minimum  interest rates ranged
          from [____] % per annum to [____]%  per annum with a weighted  average
          minimum  rate of [____]%  per annum.  The gross  margins  ranged  from
          [____]% per annum to [____]% per annum with a weighted  average  gross
          margin of [____]% per annum.

     o    [Description of Index].

     o    The original  loan-to-value  ratio of the mortgage  loans was not more
          than [___]%,  with a weighted average original  loan-to-value ratio of
          approximately [___]%.

     Loan-to-value ratio as used in this prospectus supplement, is calculated as
the original  mortgage  loan amount,  divided by the lesser of (i) the appraised
value of the related mortgaged



                                      S-15
<PAGE>



property at origination  and (ii) if the mortgage loan is a purchase money loan,
the sales price of the related mortgaged property.



                                      S-16
<PAGE>


     The tables below describe  additional  statistical  characteristics  of the
mortgage loans as of the cut-off date. All  percentages  are approximate and are
stated by principal  balance of the mortgage  loans as of the cut-off date,  and
have been rounded in order to add to 100%.  Dollar  amounts and number of months
have also been rounded.

                      DISTRIBUTION OF YEAR OF FIRST PAYMENT

<TABLE>

                         NUMBER OF      AGGREGATE PRINCIPAL   % OF AGGREGATE
YEAR OF FIRST PAYMENT   MORTGAGE LOANS      BALANCE           PRINCIPAL BALANCE

<S>                       <C>                  <C>                  <C>





Total

</TABLE>




                                      S-17
<PAGE>





                                  GROSS MARGIN
<TABLE>

RANGE OF GROSS      NUMBER OF       AGGREGATE PRINCIPAL      % OF  AGGREGATE
MARGINS(%)        MORTGAGE LOANS        BALANCE              PRINCIPAL BALANCE

<S>                  <C>                 <C>                       <C>






      TOTAL..........

</TABLE>


                                 MORTGAGE RATES
<TABLE>

RANGE OF           NUMBER OF          AGGREGATE PRINCIPAL     % OF AGGREGATE
MORTGAGE RATES     MORTGAGE LOANS         BALANCE             PRINCIPAL BALANCE
<S>                    <C>                    <C>                 <C>

%
%
%
%
%
%
%
Total

</TABLE>

     As of the cut-off date, the weighted average mortgage rates of the mortgage
loans will be [____]%.


                           CUT-OFF DATE MORTGAGE LOAN
                               PRINCIPAL BALANCES





                                      S-18
<PAGE>

<TABLE>

RANGE OF CUT-OFF DATE       NUMBER OF        AGGREGATE PRINCIPAL    % OF AGGREGATE
PRINCIPAL BALANCES          MORTGAGE LOANS         BALANCE          PRINCIPAL BALANCE

<S>                            <C>                  <C>                  <C>

Up to $50,000.00
$50,000.01-$100,000.00
$100,000.01-$150,000.00
$150,000.01-$200,000.00
$200,000.01-$250,000.00
$250,000.01-$300,000.00
$300,000.01-$350,000.00
$350,000.01-$400,000.00
$400,000.01-$500,000.00
$500,000.01-$600,000.00
$600,000.01-$700,000.00
$700,000.01-$800,000.00
$800,000.01-$900,000.01
$900,000.01-$1,000,000.00
Over $1,000,000.01
Total

</TABLE>


     As of the cut-off  date,  the  mortgage  loan  principal  balances  will be
$[______].







                                      S-19
<PAGE>

                            MORTGAGED PROPERTY TYPES


<TABLE>

                    NUMBER OF         AGGREGATE PRINCIPAL     % OF AGGREGATE
PROPERTY TYPE     MORTGAGE LOANS          BALANCE             PRINCIPAL BALANCE

<S>                  <C>                   <C>                     <C>

Single-Family
Residence
Condominium
Two Family
Three Family
Four Family
Townhouse
Total

</TABLE>

                              MORTGAGE LOAN PURPOSE
<TABLE>

                          NUMBER OF      AGGREGATE PRINCIPAL    % OF AGGREGATE
PURPOSE                MORTGAGE LOANS        BALANCE          PRINCIPAL BALANCE

<S>                        <C>                  <C>                    <C>

Refinancing
Cash-Out Refinancing
Purchase
Unknown
Total

</TABLE>

                          MORTGAGE LOAN OCCUPANCY TYPES
<TABLE>

                      NUMBER OF       AGGREGATE PRINCIPAL    % OF AGGREGATE
OCCUPANCY TYPE      MORTGAGE LOANS        BALANCE            PRINCIPAL BALANCE

<S>                      <C>                 <C>                   <C>

Primary
Investment
Second Home
Total

</TABLE>



                                      S-20
<PAGE>


                        MORTGAGE LOAN DOCUMENTATION TYPES

<TABLE>
                      NUMBER OF       AGGREGATE PRINCIPAL      % OF AGGREGATE
DOCUMENTATION       MORTGAGE LOANS        BALANCE              PRINCIPAL BALANCE

<S>                      <C>                <C>                      <C>

Low Documentation
Full Documentation
Reduced Documentation
Streamline Refinance
Total

</TABLE>

                             ORIGINAL TERM TO STATED
                         MATURITY OF THE MORTGAGE LOANS

<TABLE>

                     NUMBER OF       AGGREGATE PRINCIPAL      % OF AGGREGATE
RANGE OF MONTHS     MORTGAGE LOANS        BALANCE             PRINCIPAL BALANCE

<S>                    <C>                <C>                     <C>



</TABLE>

     The  weighted  average  original  term to stated  maturity for the mortgage
loans is [___] months.

                            REMAINING TERM TO STATED
                         MATURITY OF THE MORTGAGE LOANS

<TABLE>
                      NUMBER OF      AGGREGATE PRINCIPAL       % OF AGGREGATE
RANGE OF MONTHS     MORTGAGE LOANS       BALANCE              PRINCIPAL BALANCE

<S>                     <C>               <C>                       <C>



           Total

</TABLE>

     The weighted  average  remaining  term to stated  maturity for the mortgage
loans is [___] months.



                                      S-21
<PAGE>


                    [INSERT GEOGRAPHICAL DISTRIBUTION TABLE]

                             ORIGINAL LOAN-TO-VALUE
                          RATIOS OF THE MORTGAGE LOANS

<TABLE>

RANGE OF ORIGINAL         NUMBER OF          AGGREGATE        % OF AGGREGATE
LOAN-TO-VALUE RATIOS   MORTGAGE LOANS    PRINCIPAL BALANCE   PRINCIPAL BALANCE

<S>                         <C>                <C>                 <C>

0.00%--50.00%
50.01%-55.00%
55.01%-60.00%
60.01%-65.00%
65.01%-70.00%
70.01%-75.00%
75.01%-80.00%
80.01%-85.00%
85.01%-90.00%
90.01%-95.00%
Total

</TABLE>

     The weighted average of the original  loan-to-value ratios for the mortgage
loans is [___]%.

     The weighted average of the Discount Fractions of the mortgage loans will
be ___%.

     [Included  below is a table showing the Credit Scores for some  mortgagors.
Credit Scores are obtained by many mortgage  lenders in connection with mortgage
loan applications to help assess a borrower's  credit-worthiness.  Credit Scores
are  obtained  from  credit  reports   provided  by  various  credit   reporting
organizations,   each  of  which  may  employ  differing   computer  models  and
methodologies.  The  Credit  Score is  designed  to assess a  borrower's  credit
history at a single point in time, using objective information currently on file
for the borrower at a particular credit reporting organization. Information used
to create a Credit  Score may  include,  among other  things,  payment  history,
delinquencies on accounts, levels of outstanding indebtedness,  length of credit
history,  types of credit, and bankruptcy  experience.  Credit Scores range from
[__] to [__], with higher scores  indicating an individual with a more favorable
credit history compared to an individual with a lower score.  However,  a Credit
Score  purports  only  to be a  measurement  of the  relative  degree  of risk a
borrower represents to a lender at a single point in time, i.e., a borrower with
a higher score is statistically expected to be less likely to default in payment
than a borrower with a lower score. In addition,  investors should be aware that
Credit Scores were developed to indicate a level of default  probability  over a
two-year  period,  which does not  correspond  to the life of a  mortgage  loan.
Mortgage loans typically amortize over a [__] year period.  Furthermore,  Credit
Scores were not  developed  specifically  for use in  connection  with  mortgage
loans,  but for consumer loans in general,  and assess only the borrower's  past
credit history.  Therefore,  a Credit Score does not take into consideration the
differences between mortgage loans and consumer loans generally, or the specific
characteristics  of the related  mortgage loan, for example,  the  loan-to-value
ratio, the collateral for the mortgage loan, or the debt to income ratio.  There
can be no assurance that the Credit Scores of the



                                      S-22
<PAGE>


mortgagors  will be an accurate  predictor of the likelihood of repayment of the
related  mortgage loans or that any mortgagor's  Credit Score would not be lower
if obtained as of the date of the prospectus supplement.]

                           [CREDIT SCORE DISTRIBUTION]

<TABLE>

                          NUMBER OF      AGGREGATE PRINCIPAL   % OF AGGREGATE
RANGE OF NOTE MARGINS   MORTGAGE LOANS       BALANCE           PRINCIPAL BALANCE

<S>                         <C>               <C>                  <C>

451-500
501-550
551-600
601-650
651-700
701-750
751-800
801-850
Total

</TABLE>

UNDERWRITING STANDARDS

GENERAL

     All of the mortgage loans included in the mortgage pool will be acquired by
the  depositor  from the seller.  The  following is a brief  description  of the
various  underwriting  standards and the  procedures  applicable to the mortgage
loans.

     All one- to four-family  residential  mortgage  loans must meet  acceptable
credit,  appraisal and underwriting  criteria as established by the seller.  The
seller's underwriting  standards are applied in accordance with applicable state
and federal laws and regulations. Underwriting guidelines are established to set
acceptable  criteria regarding credit history,  repayment  ability,  adequacy of
necessary liquidity, and adequacy of the collateral.  These guidelines typically
conform to secondary market standards, particularly for conforming loan amounts.

     Additional  loan-to-value  ratio  guidelines are established for individual
programs and loan amount ranges.

     Three general sets of  underwriting  guidelines  are applicable to mortgage
loans:

     o    Standard:  includes  all the basic  guidelines  and is applied to both
          fixed rate and ARM products;

     o    Portfolio  Feature:  includes  specific  enhanced  guidelines  such as
          slightly  higher  loan-to-value  ratios,  and 40  year  terms,  and is
          available only on ARM products; and




                                      S-23
<PAGE>

     o    Subprime:  allows for  deviations  from basic  guidelines  for credit,
          collateral  and  income  stability  in return for  risk-based  pricing
          premiums.

     [The mortgage loans have been  originated  under  documentation  guidelines
classified as "Full Doc", "Low Doc Reduced Doc" and "Streamline  Refinance Doc."
The Full Doc program  consists  of two years of tax  returns  for  self-employed
applicants,  paystubs and W-2's for salaried  applicants and bank statements for
verification of liquidity.  The Low Doc program utilizes income as stated by the
borrower in the loan application and, for certain  loan-to-value ratios and loan
amounts, assets as stated by the borrower. In Low Doc transactions,  independent
confirmation  of the  borrower's  source  of  income is  obtained.  The  Reduced
Documentation  program utilizes borrower paystubs and W-2 forms and a Streamline
Refinance   Documentation   program  utilizes  borrower  paystubs  and  original
appraised value with a current drive-by inspection.]

     [CSFB]'s underwriting of the mortgage loans consisted of an analysis of
the following applicant information:

     o    an  applicant's  income,  employment,   assets,  debts,  payments  and
          specific questions regarding credit history,

     o    an evaluation and confirmation of an applicant's credit history,

     o    the  adequacy  and  stability of an  applicant's  income,  including a
          review of the documentation, verification of employment and income, an
          analysis of tax returns and statements of assets and liabilities.

     o    calculations  are made to establish  the  relationship  between  fixed
          expenses  and  gross  monthly  income,  which  are  reviewed  for  the
          applicant's overall ability to repay the mortgage loan including other
          income  sources,  commitment  to the  property as evidenced by loan to
          value, other liquid resources,  ability to accumulate assets and other
          compensating factors, and

     o    the adequacy of the mortgaged  property to serve as  collateral  for a
          mortgage  loan,  including a physical  inspection of the property,  an
          evaluation  of the  property's  value for recent  sales of  comparable
          properties and its conformity to neighborhood standards.

     [All  mortgage  loans are  subject to a sampling by the  seller's  internal
Quality  Assurance  Department,  which  reviews  and  reverifies  a  statistical
sampling of loans on a regular basis. All loans with  loan-to-value  ratios over
80% have either private mortgage  insurance coverage in an amount meeting Fannie
Mae and Freddie Mac  requirements  or a higher  interest rate in lieu of private
mortgage  insurance.]  Adequate title insurance and hazard insurance is required
for all loans. From time to time, loan-to-value ratio exceptions may be made for
credit  worthy  applicants  who  exhibit  strong  compensating  factors and well
supported collateral valuations.



                                      S-24
<PAGE>



                           THE SELLER AND THE SERVICER

GENERAL

[____________________], is the seller and servicer for all the mortgage loans in
the mortgage pool.

                [ADDITIONAL SERVICER INFORMATION TO BE INCLUDED]



                         DESCRIPTION OF THE CERTIFICATES

GENERAL

     The Trust will issue the following [___] classes of senior certificates:

     o    [Class A Certificates]; [and

     o    [Class R Certificates].]

     In addition  to the senior  certificates,  the trust will also  include the
following [___] classes of subordinate certificates:

     o    [Class M Certificates]; and

     o    [Class B Certificates].

Only the Class A Certificates[,  Class R Certificates]  and Class M certificates
are offered by this prospectus supplement.

     The certificates will evidence the entire beneficial  ownership interest in
the trust. The trust will consist of:

     o    the mortgage loans;

     o    the assets as from time to time are  identified as deposited  relating
          to the mortgage loans in the Custodial  Account and in the Certificate
          Account and belonging to the trust;

     o    property acquired by foreclosure of the mortgage loans or deed in lieu
          of foreclosure;

     o    any  applicable   primary  mortgage   insurance  policies  and  hazard
          insurance policies; and

     o    all proceeds of any of the foregoing.




                                      S-25
<PAGE>

     The Class A Certificates evidence in the aggregate an initial beneficial
ownership   interest  of  approximately   [___]%  in  the  trust.  The  Class  M
Certificates and Class B Certificates  will evidence in the aggregate an initial
beneficial  ownership interest of approximately  [___]% and [___]% respectively,
in the trust.

     The Class A  Certificates  and the Class M  Certificates  will be available
only in book-entry  form through the facilities of The Depository  Trust Company
or DTC.  The Class A  Certificates  and Class M  Certificates  will be issued in
minimum  denominations of $25,000 and integral multiples of $1 in excess of that
amount.  [The Class R Certificates  will be issued in  registered,  certificated
form in minimum denominations of [__]% percentage interests.]

BOOK-ENTRY REGISTRATION

     The  Class  A  Certificates  and  Class  M  Certificates  will  be  issued,
maintained  and   transferred   on  the  book-entry   records  of  DTC  and  its
participants.  Any person  acquiring an interest in any Class A Certificate  and
Class  M  Certificate  will  hold  its  certificate  through  DTC,  if  it  is a
participant  in that  system,  or  indirectly  through  organizations  which are
participants in that system.  The Class A Certificates  and Class M Certificates
will be  represented by one or more  certificates  registered in the name of the
nominee of DTC. The  depositor  has been informed by DTC that DTC's nominee will
be Cede & Co.

     Beneficial  owners that are not  participants or indirect  participants but
desire to purchase,  sell or otherwise transfer ownership of, or other interests
in, the Class A  Certificates  or Class M  Certificates  may do so only  through
participants  and indirect  participants.  In addition,  beneficial  owners will
receive  all  distributions  of  principal  of  and  interest  on  the  Class  A
Certificates  and Class M  Certificates  from the paying  agent  through DTC and
participants.  Accordingly,  beneficial  owners may  experience  delays in their
receipt of payments. Unless and until definitive certificates are issued for the
Class A Certificates  and Class M Certificates,  it is anticipated that the only
registered   certificateholder   of  the  Class  A  Certificates   and  Class  M
Certificates  will be Cede,  as  nominee  of DTC.  No  beneficial  owner will be
entitled  to receive a  certificate  of any class in fully  registered  form,  a
definitive  certificate,  except as  described  in this  prospectus  supplement.
Beneficial  owners  will not be  recognized  by the  trustee or the  servicer as
certificateholders,  as the term is used in the pooling and servicing agreement,
and  beneficial  owners will be  permitted to receive  information  furnished to
certificateholders  and  to  exercise  the  rights  of  certificateholders  only
indirectly through DTC, its participants and indirect participants.

     Under the rules,  regulations and procedures creating and affecting DTC and
its  operations,  DTC is required to make  book-entry  transfers  of the Class A
Certificates  and Class M  Certificates  among  participants  and to receive and
transmit   distributions   of  principal  of,  and  interest  on,  the  Class  A
Certificates and Class M Certificates.  Participants  and indirect  participants
with which  beneficial  owners have  accounts for the Class A  Certificates  and
Class M  Certificates  similarly are required to make  book-entry  transfers and
receive and  transmit  distributions  on behalf of their  respective  beneficial
owners.  Accordingly,  although  beneficial  owners  will not  possess  physical
certificates  evidencing their interests in the Class A Certificates and Class M
Certificates,  DTC's  rules  provide a  mechanism  by which  beneficial  owners,
through




                                      S-26
<PAGE>

their  participants and indirect  participants,  will receive  distributions and
will be able to transfer their interests in the Class A Certificates and Class M
Certificates.

     None of the depositor, the servicer or the trustee will have any liability
for any actions  taken by DTC or its  nominee,  including,  without  limitation,
actions for any aspect of the records relating to or payments made on account of
beneficial  ownership  interests  in  the  Class  A  Certificates  and  Class  M
Certificates  held by Cede, as nominee for DTC, or for maintaining,  supervising
or reviewing any records relating to the beneficial ownership interests.

DEFINITIVE CERTIFICATES

     Definitive  certificates  will be  issued  to  beneficial  owners  or their
nominees,  respectively,  rather  than to DTC or its  nominee,  only  under  the
following limited conditions:

     o    the  depositor  notifies  the trustee in writing that DTC is no longer
          willing or able to discharge  its  responsibilities  as  depository in
          relation  to the  book-entry  certificates  and  the  trustee  and the
          depositor are unable to locate a qualified successor;

     o    the depositor  elects to terminate the book-entry  system through DTC;
          or

     o    after the  occurrence  of an event of default  under the  pooling  and
          servicing  agreement,  holders of certificates  evidencing at least 66
          2/3% of the aggregate outstanding certificate principal balance of the
          certificates,  advise  the  trustee  and  DTC  that  the  use  of  the
          book-entry  system  through DTC is no longer in the best  interests of
          the holders of the certificates.

     On the occurrence of any of the events  described above, DTC is required to
notify all DTC participants of the availability of definitive  certificates.  On
surrender  by  DTC of the  definitive  certificates  representing  the  Class  A
Certificates  and Class M Certificates  and on receipt of instructions  from DTC
for re-registration, the trustee will reissue the Class A Certificates and Class
M Certificates  as definitive  certificates  issued in the respective  principal
amounts owned by individual  beneficial  owners,  and thereafter the trustee and
the  servicer  will  recognize  the holders of the  definitive  certificates  as
certificateholders under the pooling and servicing agreement.




                                      S-27
<PAGE>



GLOSSARY OF TERMS

     The following terms are given the meanings shown below to help describe the
cash flows on the certificates:

     AGGREGATE SUBORDINATE PERCENTAGE - For any date of determination, an amount
equal to the aggregate Certificate Principal Balance of the Class M Certificates
and Class B  Certificates,  divided by the aggregate  Principal  Balances of the
mortgage loans immediately prior to that date.

     AVAILABLE DISTRIBUTION AMOUNT - For any distribution date, the excess of:

     (A) the sum of:

     o    the aggregate amount of scheduled payments and collections received by
          the servicer relating to each mortgage loan on or prior to the related
          determination  date and not  previously  remitted,  from  any  source,
          including  amounts  received  from the  related  mortgagor,  Insurance
          Proceeds,  Liquidation Proceeds,  net of related Liquidation Expenses,
          and condemnation  awards,  and amounts received in connection with the
          purchase  of any  mortgage  loans by the  seller or  servicer  and the
          substitution of replacement mortgage loans, and excluding interest and
          other  earnings on amounts on deposit in or credited to the  Custodial
          Account and the Certificate Account, and

     o    the aggregate amount of monthly Advances [and Compensating  Interest],
          required to be remitted by the servicer  relating to that distribution
          date;

     (B)  over the sum of:

     o    the aggregate  amount of the servicing  compensation to be paid to the
          servicer  under  the terms of the  pooling  and  servicing  agreement,
          including,  without limitation,  servicing fees, prepayment penalties,
          fees or premiums,  late payment  charges and  assumption  fees and any
          excess  interest  charges  payable by the  mortgagor  by virtue of any
          default or other non-compliance by the mortgagor with the terms of the
          mortgage  note  or  any  other  instrument  or  document  executed  in
          connection therewith or otherwise,

     o    any amount representing late payments or other recoveries of principal
          or  interest,  including  Liquidation  Proceeds,  net  of  Liquidation
          Expenses, Insurance Proceeds and condemnation awards, for any mortgage
          loans which the servicer has made a  previously  unreimbursed  monthly
          Advance to the extent of that monthly Advance,

     o    amounts  representing  reimbursement  of  nonrecoverable  Advances and
          other amounts  permitted to be withdrawn from the Custodial Account or
          the Certificate Account,




                                      S-28
<PAGE>


     o    all  monthly  payments or  portions  of monthly  payments,  other than
          principal prepayments and other unscheduled  collections of principal,
          received relating to scheduled  principal and interest on any mortgage
          loan due after the related due period and included therein,

     o    all payments due on any mortgage  loan on or prior to the cut-off date
          and included therein, and

     o    principal  prepayments and other unscheduled  collections of principal
          received after the related prepayment period and included therein.

     CERTIFICATE  PRINCIPAL BALANCE - For any offered certificate as of any date
of determination,  an amount equal to the initial Certificate  Principal Balance
of that certificate, reduced by the aggregate of:

     o    all amounts  allocable to principal  previously  distributed  for that
          certificate, and

     o    any  reductions  in  the   Certificate   Principal   Balance  of  that
          certificate  deemed to have occurred in connection with allocations of
          Realized Losses in the manner described in this prospectus supplement.

     CLASS B PERCENTAGE - As of any date of  determination a percentage equal to
100% minus the sum of the Class A Percentage and the Class M Percentage.

     CLASS M INTEREST DISTRIBUTION AMOUNT - For any distribution date, an amount
equal to:

     o    one-twelfth of the product of (i) the  Certificate  Principal  Balance
          for the  related  class of  certificates  immediately  preceding  that
          distribution  date,  multiplied by (ii) the pass-through rate for that
          class;

     o    minus, the sum of:

          (1)  any related Prepayment Interest  Shortfalls  occurring during the
               related Prepayment Period; and

          (2)  any related  Relief Act Shortfalls  occurring  during the related
               due period.

     CLASS  M  PERCENTAGE  -  For  any  date  of  determination,  the  aggregate
Certificate  Principal  Balances  of the  Class M  Certificates  divided  by the
aggregate  Principal  Balances of all mortgage loans  immediately  prior to that
determination date.

     CLASS M  PRINCIPAL  DISTRIBUTION  AMOUNT - For any  distribution  date,  an
amount equal to the lesser of (i) the Available  Distribution  Amount  remaining
after payment of the Senior Interest  Distribution  Amount, the Senior Principal
Distribution  Amount and the Class M Interest Amount and (ii) the product of the
related Class M Percentage and the Principal Distribution Amount.



                                      S-29
<PAGE>

     [COMPENSATING  INTEREST  - The  sum of the  servicing  fee  payable  to the
servicer for its servicing  activities and  reinvestment  income received by the
servicer on amounts payable for that distribution date.]

     FINAL  DISPOSITION  - With  respect to a defaulted  mortgage  loan, a Final
Disposition is deemed to have occurred upon a determination by the servicer that
it has received all Insurance Proceeds,  Liquidation Proceeds and other payments
or cash recoveries which the servicer reasonably and in good faith expects to be
finally recoverable with respect to the mortgage loan.

     NET MORTGAGE  RATE - On each  mortgage  loan is equal to its mortgage  rate
minus the servicing fee rate as described in this prospectus supplement.

     PASS-THROUGH RATE - For each class of certificates is the per annum rate at
which interest accrues on that class.

     o    The  Pass-Through   Rate  for  the  Class  A,  Class  M  and  Class  R
          Certificates is equal to the per annum rate listed on page S-[__].

     o    The Pass-Through Rate for the Class B Certificates is equal to [__]%.

     PREPAYMENT  INTEREST  SHORTFALL - For any distribution date is equal to the
aggregate  shortfall if any in collections of interest,  adjusted to the related
Net Mortgage  Rates,  resulting  from full or partial  mortgagor  prepayments of
principal on the related  mortgage  loans during the related  prepayment  period
less any  Compensating  Interest  payable  for  that  distribution  date.  These
shortfalls  will result  because  interest on prepayments in full is distributed
only to the date of  prepayment,  and  because no  interest  is  distributed  on
prepayments  in  part,  as  prepayments  in  part  are  applied  to  reduce  the
outstanding  principal  balance of the related mortgage loans as of the due date
in the month of prepayment.  For any distribution date, any interest  shortfalls
resulting from  prepayments in full during the preceding  calendar month will be
offset by the servicer,  but only to the extent such interest  shortfalls do not
exceed an amount equal to the lesser of (a) one-twelfth of 0.125% of the [Stated
Principal Balance] of the mortgage loans immediately preceding that distribution
date  and (b) the sum of the  servicing  fee  payable  to the  servicer  for its
servicing activities and reinvestment income received by the servicer on amounts
payable for that distribution date.

     PREPAYMENT  PERIOD - For any distribution  date is the calendar month prior
to the month in which that distribution date occurs.

     PRINCIPAL  BALANCE - For any mortgage loan as of any date of determination,
an amount equal to the initial  certificate  principal balance as of the cut-off
date,  minus all amounts  allocated to principal  that have been  distributed to
certificateholders  for that  mortgage  loan on or before that date,  as further
reduced to the extent any  Realized  Loss  thereon has been  allocated to one or
more classes of certificates on or before that date.

     PRINCIPAL  DISTRIBUTION  AMOUNT - On any distribution  date, the sum of the
following:




                                      S-30
<PAGE>

          (1) the principal portion of all scheduled monthly payments due during
     the related due period on each  outstanding  mortgage loan,  whether or not
     received on or prior to the related determination date;

          (2) the Principal Balance of any mortgage loan repurchased  during the
     related Prepayment Period under the pooling and servicing agreement and the
     amount of any shortfall  deposited in the  Custodial  Account in connection
     with the  substitution  of a deleted  mortgage  loan under the  pooling and
     servicing agreement during the related prepayment period;

          (3)  the  principal  portion  of all  other  unscheduled  collections,
     including  principal  prepayments  in full  and  curtailments  and  amounts
     received in connection with a [Final  Disposition] [Cash Liquidation or REO
     Disposition] of a mortgage loan described in clause  (a)(ii)(B),  Insurance
     Proceeds, Liquidation Proceeds; and

     any amounts  allocable to  principal  for any  previous  distribution  date
calculated under clauses (1), (2) and (3) above that remain undistributed to the
extent that such  amounts are not  attributable  to Realized  Losses  which were
allocated to the Class M Certificates or Class B Certificates.

     REALIZED LOSS - The amount  determined by the servicer,  in connection with
any  mortgage  loan  equal to (i) for any  liquidated  loan,  the  excess of the
principal  balance of the liquidated loan plus interest  thereon at a rate equal
to the  applicable  Net Mortgage Rate from the due date as to which interest was
last paid up to the due date next succeeding such liquidation over proceeds,  if
any,  received in connection  with the  liquidation,  after  application  of all
withdrawals  permitted  to be made by the  servicer  from the related  Custodial
Account for the mortgage  loan,  (ii) for any mortgage loan which has become the
subject of a deficient  valuation,  the excess of the  principal  balance of the
mortgage  loan over the  principal  amount as  reduced  in  connection  with the
proceedings  resulting in the deficient  valuation,  (iii) for any mortgage loan
which has become the subject of a Debt Service  Reduction,  the present value of
all monthly Debt Service  Reductions  on that mortgage  loan,  assuming that the
mortgagor  pays each  monthly  payment  on the  applicable  due date and that no
principal prepayments are received for that mortgage loan, discounted monthly at
the  applicable  mortgage  rate,  or (iv) the  amount  of any  reduction  by the
servicer to the  principal  balance of that  mortgage loan under the pooling and
servicing agreement as a result of a default or imminent default.

     RELIEF ACT SHORTFALL - For any distribution  date and any mortgage loan, is
the amount of any interest that is not collectible from the mortgagor during the
related due period under the Relief Act or similar legislation or regulations as
in effect from time to time.

     SENIOR  CUMULATIVE  INTEREST  SHORTFALL  AND  CLASS M  CUMULATIVE  INTEREST
SHORTFALL - For any distribution date, an amount equal to (i) any portion of the
related Senior  Interest  Distribution  Amount or Class M Interest  Distribution
Amount,  as applicable,  that was not  distributed to the Holders of the related
Senior  Certificates or the Holders of Class M Certificates,  as applicable,  on
any  preceding  Distribution  Date less (ii) any amount  described in clause (i)
hereof  that is  included  in a  Realized  Loss that has been  allocated  to the
holders of



                                      S-31
<PAGE>


Class A  Certificates,  Class R Certificates or Class M Certificates on or prior
to that distribution date.

     SENIOR INTEREST  DISTRIBUTION AMOUNT - For each distribution date an amount
equal to:  one-twelfth of the product of the Certificate  Principal  Balance for
the  related  class  of  Class  A   Certificates   immediately   preceding  that
distribution date,  multiplied by the pass-through rate on that class,  provided
that if the  Available  Distribution  Amount  is  insufficient  to make the full
distributions of interest referred to in this clause, the Available Distribution
Amount  shall  be  distributed  to the  Class A  Certificates  and  the  Class R
Certificates pro rata based on the full amounts allocable to that class.

     SENIOR  PERCENTAGE - As of any date of  determination a percentage equal to
the lesser of (a) 100% and (b) the aggregate  Certificate  Principal  Balance of
the [Class A Certificates and Class R Certificates],  immediately  prior to that
distribution  date  divided  by the  aggregate  Principal  Balance of all of the
mortgage loans immediately prior to that distribution date.

     SENIOR PRINCIPAL  DISTRIBUTION AMOUNT - On any distribution date, an amount
equal to the lesser of (a) the  balance  of the  Available  Distribution  Amount
remaining after the Senior Interest Distribution Amount has been distributed and
(b) the Senior Percentage times the Principal Distribution Amount.

DISTRIBUTIONS

     Distributions  on the offered  certificates  will be made by the trustee on
the [__] day of each month or, if that day is not a business  day, then the next
succeeding  business day,  commencing  in [______  200_].  Distributions  on the
certificates  will be made to the  persons in whose names the  certificates  are
registered at the close of business on the day prior to each  distribution  date
or, if the certificates are no longer DTC registered certificates, on the record
date. See  "Description  of the  Securities--Distributions"  in the  prospectus.
Distributions  will be made by check or money order mailed, or on the request of
a  certificateholder   owning  [Class  A  Certificates]  having   denominations,
aggregating at least $1,000,000,  by wire transfer or otherwise,  to the address
of the person entitled to the distribution, which, in the case of DTC registered
certificates,  will  be DTC or  its  nominee,  as it  appears  on the  trustee's
register in amounts calculated as described in this prospectus supplement on the
determination date. However, the final distribution relating to the certificates
will be made only on presentation and surrender of the certificate at the office
or the agency of the trustee  specified in the notice to  certificateholders  of
the final  distribution.  A business day is any day other than (a) a Saturday or
Sunday or (b) a day on which banking  institutions in the states of [__________]
and [_______] are required or authorized by law to be closed.

INTEREST DISTRIBUTIONS

     Holders  of each class of Class A  Certificates  [and each class of Class R
Certificates],  will be entitled to receive interest  distributions in an amount
equal to the Accrued  Certificate  Interest  on that class on each  distribution
date, to the extent of the Available  Distribution  Amount for that distribution
date,  commencing on the first  distribution  date in the case of all classes of
Class  A  Certificates   [and  Class  R   Certificates]   entitled  to  interest
distributions.



                                      S-32
<PAGE>

     Holders of each class of Class M  Certificates  will be entitled to receive
interest distributions in an amount equal to the Accrued Certificate Interest on
that  class  on  each  distribution   date,  to  the  extent  of  the  Available
Distribution  Amount for that distribution date after  distributions of interest
and  principal  to the Class A  Certificates  [and  Class R  Certificates],  and
reimbursements for some Advances to the servicer.

     Prepayment Interest Shortfalls will result because interest on prepayments
in full is distributed  only to the date of prepayment,  and because no interest
is distributed on prepayments in part, as these  prepayments in part are applied
to reduce the outstanding  principal balance of the related mortgage loans as of
the due date in the month of prepayment.

     [However,  on any  distribution  date, any Prepayment  Interest  Shortfalls
resulting from  prepayments in full during the preceding  calendar month will be
offset  by the  servicer,  but  only to the  extent  those  Prepayment  Interest
Shortfalls  do  not  exceed  the  amount  of  the  servicing  fee  due  on  that
distribution  date.   Prepayment  Interest  Shortfalls  resulting  from  partial
prepayments  will not be offset by the servicer from servicing  compensation  or
otherwise.  No assurance  can be given that the servicing  compensation  will be
sufficient to cover the shortfalls on any distribution date. Prepayment Interest
Shortfalls will be allocated to all certificates from which the shortfall arose,
based on interest  accrued on those  classes  for that  distribution  date.  See
"Pooling and Servicing  Agreement--Servicing  and Other Compensation and Payment
of Expenses" in this prospectus supplement.]

     If on any distribution date the Available  Distribution Amount is less than
Accrued  Certificate   Interest  on  the  Class  A  Certificates  [and  Class  R
Certificates] for that distribution  date, the shortfall will be allocated among
the holders of all classes of Class A Certificates [and Class R Certificates] in
proportion to the respective  amounts of Accrued  Certificate  Interest for that
distribution date. In addition,  the amount of any interest  shortfalls that are
covered by subordination, specifically, interest shortfalls not described in the
definition of Available Distribution Amount preceding paragraph,  will be unpaid
Accrued  Certificate  Interest  and  will be  distributable  to  holders  of the
certificates   of  those  classes   entitled  to  those  amounts  on  subsequent
distribution dates, in each case to the extent of available funds after interest
distributions as required in this prospectus supplement.

     These shortfalls could occur, for example, if delinquencies on the mortgage
loans were  exceptionally  high and were  concentrated in a particular month and
Advances by the  servicer  did not cover the  shortfall.  Any amounts so carried
forward will not bear interest.  Any interest shortfalls will not be offset by a
reduction in the servicing compensation of the servicer or otherwise,  except to
the limited extent described in the preceding  paragraph for Prepayment Interest
Shortfalls resulting from prepayments in full.

As described in this prospectus  supplement,  the Accrued  Certificate  Interest
allocable to each class of certificates  is based on the  Certificate  Principal
Balance of that class.




                                      S-33
<PAGE>




PRINCIPAL  DISTRIBUTIONS  ON THE CLASS A CERTIFICATES,  CLASS M CERTIFICATES AND
CLASS R CERTIFICATES

     Distributions  of  principal  in an amount  equal to the  Senior  Principal
Distribution  Amount on the Class A Certificates  [and Class R Certificates]  on
each  distribution  date will be made to the Class A  Certificates  [and Class R
Certificates],  after  distribution of the Senior Interest  Distribution and any
Senior Cumulative  Interest  Shortfall  Amount,  pro rata, in reduction of their
Certificate Principal Balances,  until their Certificate Principal Balances have
been reduced to zero.

     Holders  of each  class of the Class M  Certificates  will be  entitled  to
receive on each distribution date, to the extent of the portion of the Available
Distribution Amount remaining after:

     o    the sum of the Senior  Interest  Distribution  Amount,  Principal Only
          Distribution  Amount  and  Senior  Principal  Distribution  Amount  is
          distributed,

     o    reimbursement  is  made  to the  master  servicer  for  some  Advances
          remaining  unreimbursed following the final liquidation of the related
          mortgage loan to the extent described below under "Advances," and

     o    the aggregate amount of Accrued  Certificate  Interest  required to be
          distributed to the class of Class M Certificates on that  distribution
          date is distributed to those Class M Certificates,

a  distribution   allocable  to  principal   equal  to  the  Class  M  Principal
Distribution  Amount in reduction of their  Certificate  Principal Balance until
the Certificate  Principal Balances of the Class M Certificates has been reduced
to "zero."

REMAINING DISTRIBUTIONS

     Any amounts remaining after the distributions to the Class A, [Class R] and
Class M Certificateholders on any distribution date shall be paid to the holders
of the Class B  Certificates  and Class R  Certificates  in accordance  with the
terms of the Pooling Agreement.

ASSIGNMENT OF MORTGAGE LOANS

     On the closing  date,  the seller will  transfer to the  depositor  and the
depositor  will in turn  transfer  to the  trust,  all of its  right,  title and
interest  in and to each  mortgage  loan,  the related  mortgage  note and other
related  documents  contained  in the  mortgage  file,  including  all  payments
received  after the cut-off  date,  except  payments  that  represent  scheduled
principal and interest on the mortgage loans due on or before [_______] 1, 200_.
Each mortgage loan transferred to the trust will be identified on a schedule and
the schedule  will be delivered to the trustee  under the pooling and  servicing
agreement. The mortgage loan schedule will include




                                      S-34
<PAGE>

information as to the principal  balance of each mortgage loan as of the cut-off
date, as well as information regarding the mortgage rates on the mortgage loans.

     The servicer and the seller,  respectively,  will make  representations and
warranties  regarding  its ability to service and sell the mortgage  loans.  The
seller  will make  representations  and  warranties  as to the  accuracy  in all
material  respects  of  information  furnished  to the  trustee  regarding  each
mortgage  loan. In addition,  the seller will  represent and warrant,  as of the
closing  date,  that,  among  other  things (i) the seller  has  transferred  or
assigned to the depositor all of its right,  title and interest in each mortgage
loan and mortgage file,  free of any lien, and (ii) each mortgage loan complied,
at the time of origination,  in all material  respects with applicable state and
federal  laws.  Under the pooling and servicing  agreement,  the seller will, on
discovery of a breach of any  representation  and warranty which  materially and
adversely affects the interest of the certificateholders in the related mortgage
loans and mortgage files,  have a period of 60 days after discovery or notice of
the  breach to effect a cure.  If the breach  cannot be cured  within the 60-day
period, or 120 days if the seller is diligently pursuing a cure, the seller will
be obligated to (i)  substitute  for the  defective  mortgage loan a replacement
mortgage  loan if the  substitution  is within two years of the closing  date or
(ii) purchase the defective mortgage loan from the trust at a price equal to the
outstanding  principal balance of the defective  mortgage loan as of the date of
purchase,  plus unpaid interest  thereon from the date interest was last paid or
with respect to which interest was advanced and not  reimbursed  through the end
of the  calendar  month in which the purchase  occurred,  plus the amount of any
unreimbursed servicing advances made by the servicer.

ALLOCATION OF LOSSES; SUBORDINATION

     The  subordination  provided  to the  senior  certificates  by the  Class B
Certificates and Class M Certificates and the subordination  provided to each of
the Class M  Certificates  by the Class B  Certificates  and will cover Realized
Losses on the mortgage loans. Realized Losses will be allocated as follows:

     o    first, to the Class B Certificates; and

     o    second, to the Class M Certificates,

in  each  case  until  the  certificate   principal  balance  of  the  class  of
certificates has been reduced to zero; and thereafter, Realized Losses among all
the remaining  classes of [Class A Certificates  and Class R Certificates]  on a
pro rata  basis,  until  the  Certificate  Principal  Balances  of the  [Class A
Certificates and the Class R Certificates] has been reduced to zero.

     Investors in the Class A Certificates  and Class R  Certificates  should be
aware that the certificate  principal  balances of the Class M Certificates  and
Class B Certificates  could be reduced to zero as a result of a disproportionate
amount of realized  losses on the mortgage loans.  Therefore,  the allocation to
the Class M  Certificates  and Class B  Certificates  of realized  losses on the
mortgage  loans  will  reduce  the   subordination   provided  to  the  Class  A
Certificates  and Class R Certificates  by the Class M Certificates  and Class B
Certificates  and increase the likelihood  that realized losses may be allocated
to any class of the Class A Certificates and Class R Certificates.




                                      S-35
<PAGE>

     Any  allocation  of a  Realized  Loss  to a  certificate  will  be  made by
reducing:

     o    its  Certificate  Principal  Balance,  in the  case  of the  principal
          portion  of the  Realized  Loss,  in each case  until the  Certificate
          Principal Balance of the class has been reduced to zero, and

     o    the Accrued Certificate Interest for that certificate,  in the case of
          the interest  portion of the Realized Loss, by the amount so allocated
          as of the  distribution  date  occurring  in the month  following  the
          calendar month in which the Realized Loss was incurred.

     In addition, any allocation of a Realized Loss to a Class M Certificate may
also be made by operation of the payment priorities described under "--Principal
Distributions on the Senior  Certificates" and any class of Class M Certificates
with a higher payment priority.

     In order to maximize the likelihood of  distribution in full of each Senior
Interest  Distribution  Amount,  Principal Only  Distribution  Amount and Senior
Principal Distribution Amount, on each distribution date, holders of the Class A
Certificates  and  Class R  Certificates  have a right to  distributions  of the
related Available Distribution Amount that is prior to the rights of the holders
of the Class M Certificates and Class B Certificates, to the extent necessary to
satisfy each Senior Interest  Distribution  Amount,  Principal Only Distribution
Amount and Senior Principal Distribution Amount.  Similarly,  and holders of the
Class M Certificates have a right to distributions of the Available Distribution
Amount prior to the rights of holders of the Class B Certificates.

     An  allocation  of a Realized  Loss on a pro rata  basis  among two or more
classes  of  certificates  means  an  allocation  to each of  those  classes  of
certificates on the basis of its then outstanding  Certificate Principal Balance
prior to giving effect to distributions to be made on that  distribution date in
the case of an allocation of the principal  portion of a Realized Loss, or based
on the Accrued  Certificate  Interest thereon for that  distribution date in the
case of an allocation of the interest portion of a Realized Loss.

     The application of the Senior Accelerated  Prepayment  Percentage,  when it
exceeds  the Senior  Percentage,  to  determine  the  related  Senior  Principal
Distribution  Amount will  accelerate  the  amortization  of the related  senior
certificates  relative to the actual  amortization of the mortgage loans. To the
extent that the senior  certificates  are  amortized  faster  than the  mortgage
loans,  in the absence of offsetting  Realized  Losses  allocated to the Class M
Certificates and Class B Certificates,  the percentage interest evidenced by the
senior  certificates  in the  trust  will  be  decreased,  with a  corresponding
increase in the interest in the trust evidenced by the Class M Certificates  and
Class  B  Certificates,   thereby  increasing,   relative  to  their  respective
certificate   principal   balances,   the  subordination   afforded  the  senior
certificates  by  the  Class  M  Certificates   and  the  Class  B  Certificates
collectively.

SERVICING COMPENSATION AND PAYMENT OF EXPENSES

     The servicer  will be entitled to receive each month a servicing  fee equal
to one-twelfth of the per annum rate  established  for each mortgage loan as the
servicing fee rate on the Principal Balance of each mortgage loan. The servicing
fee relating to each mortgage loan will be retained




                                      S-36
<PAGE>



by the servicer from payments and collections,  including Insurance Proceeds and
Liquidation Proceeds, for that mortgage loan. The servicer will also be entitled
to retain as additional  servicing  compensation all investment income earned on
amounts  on  deposit in the  Custodial  Account,  all  default  charges  and all
prepayment,  late  payment  and  assumption  fees and other fees  payable by the
mortgagor under the related mortgage note.

     The  servicer  will  pay all  expenses  incurred  in  connection  with  its
responsibilities  under the pooling and servicing agreement,  including all fees
and expenses  payable to any subservicer and the various  expenses  discussed in
the prospectus. See "Description of the  Certificates--Servicing by Unaffiliated
Sellers" in the prospectus.

ADVANCES

     Prior to each distribution  date, the servicer is required to make Advances
of monthly  payments  which were due on the  mortgage  loans on the  immediately
preceding due date and delinquent on the business day next preceding the related
determination date.

     These  Advances  are required to be made only to the extent they are deemed
by the  servicer to be  recoverable  from related  late  collections,  Insurance
Proceeds,  Liquidation  Proceeds or amounts  otherwise payable to the holders of
the certificates.  The purpose of making these Advances is to maintain a regular
cash flow to the certificateholders,  rather than to guarantee or insure against
losses.  The servicer  will not be required to make any Advances with respect to
reductions  in the amount of the monthly  payments on the mortgage  loans due to
the  application of the Relief Act or similar  legislation or  regulations.  Any
failure by the  servicer  to make an Advance as  required  under the pooling and
servicing  agreement  will  constitute  an event of  default,  in which case the
trustee,  as successor  servicer,  will be  obligated  to make any  Advance,  in
accordance with the terms of the pooling and servicing agreement.

     All Advances will be reimbursable to the servicer on a first priority basis
from either (i) late collections,  Insurance  Proceeds and Liquidation  Proceeds
from the mortgage loan as to which such unreimbursed Advance was made or (ii) as
to any Advance that remains unreimbursed in whole or in part following the final
liquidation  of  the  related   mortgage  loan,   from  any  amounts   otherwise
distributable on any of the certificates.  The effect of these provisions on the
Class M  Certificates  is  that,  for any  Advance  which  remains  unreimbursed
following the final  liquidation of the related mortgage loan, the entire amount
of the  reimbursement  for the Advance will be borne first by the holders of the
Class  B  Certificates,  and  then  by the  holders  of the  class  of  Class  M
Certificates  to the  extent of the  amounts  otherwise  distributable  to them,
except as provided above.

OPTIONAL TERMINATION

     The servicer will have the option,  on any  distribution  date on which the
aggregate  principal  balance  of the  mortgage  loans  is less  than 10% of the
aggregate  principal  balance of the mortgage  loans as of the cut-off  date, to
purchase all  remaining  mortgage  loans and other assets in the trust,  thereby
effecting early retirement of the offered certificates. Any purchase of mortgage
loans and other assets of the trust shall be made at a price equal to the sum of
(a) 100% of the unpaid principal balance of each mortgage loan as of the date of
repurchase plus (b)



                                      S-37
<PAGE>



accrued  interest on each  mortgage  loan at the Net  Mortgage  Rate to, but not
including,  the  first  day of the  month  in  which  the  repurchase  price  is
distributed.   Distributions  on  the  certificates  relating  to  any  optional
termination  will be paid,  first,  to the Class A Certificates  and the Class R
Certificates,  pro rata,  second,  to the Class M  Certificates  in the order of
their payment priority and, third, to the Class B Certificates.

     On  presentation  and surrender of the offered  certificates  in connection
with the termination of the trust under the  circumstances  described above, the
holders  of the  offered  certificates  will  receive  an  amount  equal  to the
Certificate  Principal  Balance  of that  class  plus  interest  thereon  at the
then-applicable pass-through rate, plus any previously unpaid interest, reduced,
as described above, in the case of the termination of the trust resulting from a
purchase of all the assets of the trust.

THE TRUSTEE

     The trustee, [________________________], has its corporate trust offices at
[_______________________].  The trustee  may resign at any time,  in which event
the depositor  will be obligated to appoint a successor  trustee.  The depositor
may also remove the trustee if the trustee  ceases to be eligible to continue as
such  under the  pooling  and  servicing  agreement  or if the  trustee  becomes
insolvent.  In these  circumstances,  the  depositor  will also be  obligated to
appoint a  successor  trustee.  Any  resignation  or removal of the  trustee and
appointment of a successor trustee will not become effective until acceptance of
the appointment by the successor trustee.

     The pooling and servicing  agreement  requires the trustee to maintain,  at
its own expense,  an office or agency in New York City where certificates may be
surrendered  for  registration  of transfer or  exchange  and where  notices and
demands to or upon the trustee  and the  certificate  registrar  relating to the
certificates under the pooling and servicing agreement may be served.

     The  trustee,  or any of its  affiliates,  in its  individual  or any other
capacity,  may become the owner or pledgee of certificates  with the same rights
as it would have if it were not trustee.

     The  trustee  will  also act as paying  agent,  certificate  registrar  and
authenticating agent under the pooling and servicing agreement.




                                      S-38
<PAGE>



                   CERTAIN YIELD AND PREPAYMENT CONSIDERATIONS

FACTORS AFFECTING PREPAYMENTS AND DEFAULTS ON THE MORTGAGE LOANS

     The yields to maturity and the  aggregate  amount of  distributions  on the
offered  certificates  will be  affected  by the rate and  timing  of  principal
payments on the mortgage  loans and the amount and timing of mortgagor  defaults
resulting in Realized  Losses.  The rate of  principal  payments on the mortgage
loans will in turn be affected by the  amortization  schedules  of the  mortgage
loans,  the  rate  of  mortgagor  prepayments  on  the  mortgage  loans  by  the
mortgagors,  liquidations of defaulted  mortgage loans and purchases of mortgage
loans due to breaches of some representations and warranties.

     The  timing  of  changes  in the  rate  of  prepayments,  liquidations  and
purchases  of the mortgage  loans may,  and the timing of Realized  Losses will,
significantly  affect  the yield to an  investor,  even if the  average  rate of
principal  payments  experienced  over  time is  consistent  with an  investor's
expectation.  The rate of prepayments on mortgage loans is also  influenced by a
variety of economic,  geographic,  social and other factors, including the level
of mortgage  interest  rates and the rate at which  mortgagors  default on their
mortgages.  In general,  if interest rates fall significantly below the mortgage
rates on the mortgage  loans,  the mortgage  loans are likely to be subject to a
higher incidence of prepayment.  On the other hand, if prevailing interest rates
rise significantly  above the mortgage rates on the mortgage loans, the mortgage
loans are likely to be subject to a lower  incidence  of  prepayment.  Since the
rate and timing of  principal  payments  on the  mortgage  loans will  depend on
future  events and on a variety of  factors,  as  described  in this  prospectus
supplement and in the prospectus under "Yield  Considerations" and "Maturity and
Prepayment  Considerations",  no  assurance  can be  given as to the rate or the
timing of principal payments on the offered certificates.

     The mortgage  loans in most cases may be prepaid by the  mortgagors  at any
time without payment of any prepayment fee or penalty, although a portion of the
mortgage  loans  provide for payment of a prepayment  penalty,  which may have a
substantial  effect  on the rate of  prepayment  of those  mortgage  loans.  See
"Description of the Mortgage Pool--Mortgage Pool Characteristics."

     Investors in the offered  certificates  should consider the risk that rapid
rates  of  prepayments  on  the  mortgage  loans,  and  therefore  of  principal
distributions  on the offered  certificates,  may  coincide  with periods of low
prevailing interest rates. During these periods, the effective interest rates on
securities  in which an  investor  in the  offered  certificates  may  choose to
reinvest amounts received as principal distributions on the offered certificates
may be lower  than the  interest  rate borne by the  certificates.  On the other
hand,  slow  rates of  prepayments  on the  mortgage  loans,  and  therefore  of
principal distributions on the offered certificates may coincide with periods of
high prevailing  interest rates.  During these periods,  the amount of principal
distributions   available  to  an  investor  in  the  offered  certificates  for
reinvestment at the high prevailing interest rates may be relatively low.




                                      S-39
<PAGE>

     All of the mortgage  loans will contain  due-on-sale  clauses.  The sale of
mortgaged properties  encumbered by non-assumable  mortgage loans will result in
the  prepayment  of the  mortgage  loans  and a  corresponding  decrease  in the
weighted  average  life of the  applicable  class of offered  certificates.  See
"Maturity and Prepayment Considerations" in the prospectus.

     The mortgage loans have been  originated with  underwriting  standards that
are less  stringent  than  underwriting  standards  employed  by Freddie Mac and
Fannie Mae and,  as a result,  may  experience  a higher  rate of  default  than
mortgage  loans  originated  with  more  stringent  underwriting  standards.  In
addition,  there is significant  geographic  concentration in the mortgage pool,
which could also  increase  the risk of loss on the  Mortgage  loans.  See "Risk
Factors" and "Description of the Mortgage Pool" in this prospectus supplement

     The assumed scheduled final distribution date for the offered  certificates
is  [________]  20__  which is the  distribution  date  occurring  in the  month
following the month in which the latest stated  maturity of any mortgage loan in
the mortgage pool.

     No event of default,  change in the priorities for  distribution  among the
classes or other provision under the pooling and servicing  agreement will arise
or  become  applicable  solely by reason of the  failure  to retire  the  entire
Certificate  Principal  Balance  of any  offered  certificates  on or before its
assumed final distribution date.

MODELING ASSUMPTIONS

     For purposes of preparing  the table below,  indicating  the  percentage of
initial Certificate  Principal Balance outstanding and the weighted average life
of the offered  certificates under various prepayment  scenarios,  the following
assumptions have been made:

     the mortgage loans consist of the following characteristics:

                                         MORTGAGE LOANS

         Aggregate principal balance               $
         Weighted Average Mortgage Rate            %
         Servicing Fee Rate                        %
         Original term to maturity
         (months)
         Remaining term to maturity
         (months)


     (1)  there are no repurchases of the mortgage loans;

     (2)  the certificates will be purchased on [___________, 20__];

     (3)  distributions on the certificates will be made on the 19th day of each
          month, commencing in [___________, 20__];

     (4)  no mortgage loan is delinquent and there are no Realized  Losses while
          the certificates are outstanding;



                                      S-40
<PAGE>



     (5)  there are no Prepayment  Interest Shortfalls or shortfalls of interest
          with regard to the mortgage loans;

     (6)  there is no optional termination of the trust by the servicer.

     These  modeling  assumptions  have  been  based  on  the  weighted  average
characteristics of the mortgage loans. The actual characteristics of many of the
mortgage loans may vary significantly from these modeling assumptions.

     Prepayments  on  mortgage  loans  are  commonly   measured  relative  to  a
prepayment standard or model. The model used in this prospectus supplement,  the
prepayment speed assumption, represents an assumed rate of prepayment each month
relative to the then  outstanding  principal  balance of a pool of new  mortgage
loans. A 100% prepayment  assumption assumes a constant  prepayment rate of 0.0%
per annum of the then outstanding principal balance of the mortgage loans in the
first month of the life of the mortgage  loans and an additional  0.2% per annum
in each month thereafter until the thirteenth month. Beginning in the thirteenth
month and in each month thereafter during the life of the mortgage loans, a 100%
prepayment  assumption assumes a constant prepayment rate of 6.0% per annum each
month. As used in the table below, a 0% prepayment assumption assumes prepayment
rates equal to 0% of prepayment assumption, no prepayments.  Correspondingly,  a
100% prepayment  assumption assumes prepayment rates equal to 100% of prepayment
assumption,  and so  forth.  Prepayment  assumption  does  not  purport  to be a
historical   description  of  prepayment  experience  or  a  prediction  of  the
anticipated  rate of  prepayment  of any pool of mortgage  loans,  including the
mortgage loans.

     The actual  characteristics  and  performance  of the  mortgage  loans will
differ from the assumptions used in constructing  the tables shown below,  which
are  hypothetical in nature and are provided only to give a general sense of how
the principal cash flows might behave under varying  prepayment  scenarios.  For
example,  it is very  unlikely  that the mortgage  loans will prepay at the same
rate until  maturity.  Any  difference  between the  assumptions  and the actual
characteristics  and  performance of the mortgage  loans,  or actual  prepayment
experience,  will affect the percentage of initial Certificate Principal Balance
outstanding over time and the weighted average life of the offered certificates.

               [TABLES REGARDING CLASS M CERTIFICATES TO BE ADDED]

                         FEDERAL INCOME TAX CONSEQUENCES

     Orrick,  Herrington & Sutcliffe LLP,  counsel to the  depositor,  has filed
with the  depositor's  registration  statement  an opinion  to the effect  that,
assuming compliance with all provisions of the pooling and servicing  agreement,
for federal  income tax  purposes,  the trust will  qualify as a REMIC under the
Internal Revenue Code.

     For federal income tax purposes:

     o    the Class R Certificates  will  constitute the sole class of "residual
          interests" in the related REMIC, and




                                      S-41
<PAGE>

     o    each class of Class A Certificates,  Class M Certificates  and Class B
          Certificates  will represent  ownership of "regular  interests" in the
          REMIC and will be treated as debt instruments of the REMIC.

     See "Federal Income Tax Consequences--REMIC Trust Funds" in the prospectus.

     For federal  income tax reporting  purposes,  the [Class [__]  Certificates
will] [the Class [__]  Certificates  may] [and Class [__] Certificates will not]
be treated as having been issued with original  issue  discount.  The prepayment
assumption  that will be used in  determining  the rate of accrual  of  original
issue  discount,  market  discount and premium,  if any, for federal  income tax
purposes  will be based on the  assumption  that,  subsequent to the date of any
determination  the  mortgage  loans will prepay at a rate equal to [100]% of the
prepayment  assumption.  No  representation is made that the mortgage loans will
prepay  at  that  rate  or  at  any  other  rate.   See   "Federal   Income  Tax
Consequences--General"  and "--REMIC  Trust  Funds--Taxation  of Owners of REMIC
Regular Certificates--Original Issue Discount" in the prospectus.

     If the  method for  computing  original  issue  discount  described  in the
prospectus  results  in a  negative  amount  for any  period  with  respect to a
certificateholder,  the amount of  original  issue  discount  allocable  to that
period would be zero and the certificateholder  will be permitted to offset that
negative  amount  only  against  future   original  issue   discount,   if  any,
attributable to those certificates.

     In some  circumstances  the OID  regulations  permit  the  holder of a debt
instrument to recognize original issue discount under a method that differs from
that  used by the  issuer.  Accordingly,  it is  possible  that the  holder of a
certificate  may be able to  select  a method  for  recognizing  original  issue
discount that differs from that used by the servicer in preparing reports to the
certificateholders and the IRS.

     Some of the offered  certificates  may be treated  for  federal  income tax
purposes as having been issued at a premium.  Whether any holder of one of those
classes  of  certificates   will  be  treated  as  holding  a  certificate  with
amortizable bond premium will depend on the  certificateholder's  purchase price
and the distributions remaining to be made on the certificate at the time of its
acquisition by the  certificateholder.  Holders of those classes of certificates
should  consult  their  tax  advisors  regarding  the  possibility  of making an
election to amortize this premium.  See "Federal Income Tax  Consequences--REMIC
Trust  Funds--Taxation  of Owners of REMIC Regular  Certificates"  and "--Market
Discount and Premium" in the prospectus.

     The [offered  certificates]  will be treated as assets described in Section
7701(a)(19)(C)  of the  Internal  Revenue Code and "real  estate  assets"  under
Section  856(c)(4)(A)  of the Internal  Revenue Code in the same proportion that
the  assets of the trust  would be so  treated.  In  addition,  interest  on the
offered  certificates  will be treated as  "interest on  obligations  secured by
mortgages on real property" under Section  856(c)(3)(B) of the Internal  Revenue
Code to the extent that the Class A  Certificates  are  treated as "real  estate
assets" under Section 856(c)(4)(A) of the Internal Revenue Code.  Moreover,  the
offered  certificates,  other  than the  Principal  Only  Certificates,  will be
"qualified  mortgages" within the meaning of Section  860G(a)(3) of the Internal
Revenue Code if  transferred to another REMIC on its startup day in exchange for
a regular or  residual  interest  therein.  However,  prospective  investors  in
offered certificates that



                                      S-42
<PAGE>

will be  treated  as assets  described  in Section  860G(a)(3)  of the  Internal
Revenue Code should note that, regardless of the treatment,  any repurchase of a
certificate pursuant to the right of the servicer or the depositor to repurchase
the offered  certificates  may adversely affect any REMIC that holds the offered
certificates  if the  repurchase  is made under  circumstances  giving rise to a
Prohibited  Transaction Tax. See "Description of the  Certificates--Termination"
and "Federal Income Tax Consequences--REMIC Trust Funds--Classification of REMIC
Trust Funds" in the prospectus.

SPECIAL TAX CONSIDERATIONS APPLICABLE TO THE CLASS R CERTIFICATES

     The IRS has issued REMIC  regulations  under the provisions of the Internal
Revenue Code that significantly affect holders of the Class R Certificates.  The
REMIC regulations impose  restrictions on the transfer or acquisition of certain
residual interests,  including the Class R Certificates.  In addition, the REMIC
regulations  contain  restrictions  that apply to the transfer of  "noneconomic"
residual interests to United States persons. The pooling and servicing agreement
includes  other  provisions  regarding  the  transfer  of Class R  Certificates,
including  (i) the  requirement  that any  transferee  of a Class R  Certificate
provide an affidavit  representing that the transferee (a) is not a disqualified
organization,  (b) is not  acquiring  the  Class R  Certificate  on  behalf of a
disqualified  organization  and (c) will  maintain that status and will obtain a
similar  affidavit  from any person to whom the  transferee  shall  subsequently
transfer a Class R Certificate,  (ii) a provision that any transfer of a Class R
Certificate to a disqualified person shall be null and void and (iii) a grant to
the servicer of the right,  without notice to the holder or any prior holder, to
sell to a  purchaser  of its choice any Class R  Certificate  that shall  become
owned by a disqualified  organization  despite (i) and (ii) above.  In addition,
under the pooling and servicing  agreement,  the Class R Certificates may not be
transferred to non-United States persons.

     The REMIC  regulations  also  provide  that a transfer  to a United  States
person of "noneconomic"  residual  interests will be disregarded for all federal
income tax purposes, and that the purported transferor of "noneconomic" residual
interests  will  continue to remain liable for any taxes due with respect to the
income on the residual interests, unless "no significant purpose of the transfer
was to  impede  the  assessment  or  collection  of  tax."  Based  on the  REMIC
regulations,  the  Class R  Certificates  may  constitute  noneconomic  residual
interests  during  some  or  all of  their  terms  for  purposes  of  the  REMIC
regulations and, accordingly,  unless no significant purpose of a transfer is to
impede  the  assessment  or  collection  of  tax,   transfers  of  the  Class  R
Certificates may be disregarded and purported  transferors may remain liable for
any taxes due relating to the income on the Class R Certificates.  All transfers
of the Class R Certificates  will be restricted in accordance  with the terms of
the pooling and servicing  agreement that are intended to reduce the possibility
of any transfer  being  disregarded  to the extent that the Class R Certificates
constitute   noneconomic   residual   interests.   See   "Federal   Income   Tax
Consequences--REMIC   Trust   Funds--Taxation   of  Owners  of  REMIC   Residual
Certificates--Noneconomic REMIC Residual Certificates" in the prospectus.

     The  Class R  Certificateholders  may be  required  to  report an amount of
taxable  income for the  earlier  accrual  periods of the term of the REMIC that
significantly  exceeds the amount of cash distributions  received by the Class R
Certificateholders  from the REMIC for those  periods.  Furthermore,  the tax on
that income may exceed the cash distributions for those periods.



                                      S-43
<PAGE>

Consequently,  Class R  Certificateholders  should  have other  sources of funds
sufficient  to pay any  federal  income  taxes due in the  earlier  years of the
REMIC's  term as a result of their  ownership  of the Class R  Certificates.  In
addition,  the required  inclusion of this amount of taxable  income  during the
REMIC's earlier accrual periods and the deferral of corresponding  tax losses or
deductions until later accrual periods or until the ultimate sale or disposition
of a Class R  Certificate  or  possibly  later  under the "wash  sale"  rules of
Section   1091  of  the   Internal   Revenue   Code  may   cause   the  Class  R
Certificateholders'  after-tax rate of return to be zero or negative even if the
Class R  Certificateholders'  pre-tax rate of return is positive.  That is, on a
present value basis, the Class R  Certificateholders'  resulting tax liabilities
could  substantially  exceed the sum of any tax  benefits  and the amount of any
cash distributions on the Class R Certificates over their life.

     An individual,  trust or estate that holds,  whether directly or indirectly
through  pass-through  entities,  a Class R  Certificate  may  have  significant
additional gross income with respect to, but may be limited on the deductibility
of,  servicing and trustee's  fees and other  administrative  expenses  properly
allocable  to  the  REMIC  in  computing  the  certificateholder's  regular  tax
liability and will not be able to deduct those fees or expenses to any extent in
computing  the  certificateholder's   alternative  minimum  tax  liability.  See
"Federal Income Tax Consequences--REMIC Trust Funds--Taxation of Owners of REMIC
Residual Certificates--Pass-Through of Servicing Fees" in the prospectus.

     The seller will be designated as the "tax matters  person" for the REMIC as
defined in the REMIC Provisions, and in connection therewith will be required to
hold not less than 0.01% of the Class R Certificates.

     Purchasers  of the Class R  Certificates  are  strongly  advised to consult
their tax advisors as to the economic and tax  consequences of investment in the
Class R Certificates.  For further information  regarding the federal income tax
consequences of investing in the Class R  Certificates,  see "Federal Income Tax
Consequences--REMIC   Trust   Funds--Taxation   of  Owners  of  REMIC   Residual
Certificates" in the prospectus.

NEW WITHHOLDING REGULATIONS

     The Treasury Department has issued new regulations which make modifications
to the withholding, backup withholding and information reporting rules described
above.  The new  regulations  attempt to unify  certification  requirements  and
modify reliance  standards.  The new regulations  will be effective for payments
made after [December 31, 200_], subject to certain transition rules. Prospective
investors  are  urged  to  consult  their  own tax  advisors  regarding  the new
regulations.

                             METHOD OF DISTRIBUTION

     In accordance with the terms and conditions of an  underwriting  agreement,
dated  [__________],  200_, Credit Suisse First Boston Corporation has agreed to
purchase and the depositor has agreed to sell the Class A  Certificates  and the
Class  M  Certificates,  [except  that  a de  minimis  portion  of the  Class  R
Certificates will be retained by [____________]]. The certificates being sold to
the underwriter are referred to as the underwritten certificates. It is



                                      S-44
<PAGE>

expected that  delivery of the  underwritten  certificates  will be made only in
book-entry form through the Same Day Funds Settlement System of DTC, on or about
[________, 200_], against payment therefor in immediately available funds. It is
expected  that the Class R  Certificates  will be available  for delivery at the
office of the  underwriter,  against payment  therefor in immediately  available
funds.

     In connection  with the  underwritten  certificates,  the  underwriter  has
agreed,  in  accordance  with  the  terms  and  conditions  of the  underwriting
agreement,  to  purchase  all of  the  underwritten  certificates  if any of the
underwritten certificates are purchased thereby.

     The underwriting agreement provides that the obligations of the underwriter
to pay for and accept delivery of the  underwritten  certificates is conditioned
upon,  among other things,  the receipt of legal opinions and to the conditions,
among others, that no stop order suspending the effectiveness of the depositor's
registration  statement  shall be in effect,  and that no  proceedings  for that
purpose shall be pending  before or threatened  by the  Securities  and Exchange
Commission.

     The  distribution  of the offered  certificates  by the  underwriter may be
effected from time to time in one or more negotiated transactions, or otherwise,
at varying  prices to be determined  at the time of sale.  The  underwriter  may
effect the transactions by selling the  certificates to or through dealers,  and
these dealers may receive  compensation in the form of  underwriting  discounts,
concessions or commissions  from the  underwriter for whom they act as agent. In
connection with the sale of the underwritten  certificates,  the underwriter may
be  deemed  to have  received  compensation  from the  depositor  in the form of
underwriting compensation. The underwriter and any dealers that participate with
the underwriter in the  distribution  of any  underwritten  certificates  may be
deemed  to be  underwriters  and any  profit on the  resale of the  underwritten
certificates  positioned by them may be deemed to be underwriting  discounts and
commissions  under the  Securities  Act of 1933,  as  amended.  Proceeds  to the
depositor  from  the sale of the  underwritten  certificates,  before  deducting
expenses payable by the depositor, will be approximately [___]% of the aggregate
Certificate  Principal  Balance of the  underwritten  certificates  plus accrued
interest  from the cut-off  date.  The  underwriter  will sell the  underwritten
certificates, other than the Class R Certificates, to the seller.

     The underwriting  agreement  provides that the depositor will indemnify the
underwriter, and that under limited circumstances the underwriter will indemnify
the depositor,  against some liabilities under the Securities Act, or contribute
to payments required to be made in respect thereof.

     The primary  source of  information  available to investors  concerning the
underwritten  certificates  will  be the  monthly  statements  discussed  in the
prospectus    under    "Description    of    the     Certificates--Reports    to
Certificateholders,"  which  will  include  information  as to  the  outstanding
principal  balance of the offered  certificates.  There can be no assurance that
any additional  information regarding the offered certificates will be available
through any other source. In addition,  the depositor is not aware of any source
through which price information about the offered certificates will be available
on an ongoing  basis.  The  limited  nature of this  information  regarding  the
offered   certificates  may  adversely  affect  the  liquidity  of  the  offered
certificates,  even if a secondary market for the offered  certificates  becomes
available.



                                      S-45
<PAGE>

                                 LEGAL OPINIONS

     Certain legal matters  relating to the  certificates  will be passed on for
the depositor and the  underwriter  by [Orrick,  Herrington & Sutcliffe LLP, New
York, New York].  Legal matters  relating to the seller and the servicer will be
passed on by [_____________________].

                                     RATINGS

     It is a condition to the issuance of the Class A  Certificates,  other than
the Principal  Only  Certificates,  and the Class R  Certificates,  that they be
rated "AAA" by [___________________] and [__________________]. It is a condition
to the  issuance of the Class M  Certificates  that they be rated not lower than
"[_____]," "[_____]"and "[_____]," respectively, by [__________].

     The ratings on mortgage pass-through certificates address the likelihood of
the  receipt  by  certificateholders  of all  distributions  on  the  underlying
mortgage loans to which the  certificateholders are entitled. The rating process
addresses the structural  and legal aspects  associated  with the  certificates,
including the nature of the underlying  mortgage loans.  The ratings assigned to
mortgage  pass-through  certificates  do not  represent  any  assessment  of the
likelihood that principal  prepayments  will be made by mortgagors or the degree
to which any prepayments might differ from those originally anticipated,  and do
not address the possibility  that  certificateholders  might suffer a lower than
anticipated yield.

     [The  "r" of the  "AAAr"  rating  of the  Principal  Only  Certificates  by
_____________ is attached to highlight derivative, hybrid, and other obligations
that ______________  believes may experience high volatility or high variability
in expected returns due to non-credit risks. Examples of these obligations are:

     o    securities  whose principal or interest return is indexed to equities,
          commodities, or currencies
     o    certain swaps and options; and
     o    interest only and principal only mortgage securities.

     The absence of an "r" symbol should not be taken as an  indication  that an
obligation will exhibit no volatility or variability in total return.]

     A security rating is not a  recommendation  to buy, sell or hold securities
and may be subject to revision or withdrawal at any time by the assigning rating
organization.  Each  security  rating should be evaluated  independently  of any
other security rating. In the event that the ratings  initially  assigned to the
offered  certificates  are  subsequently  lowered for any  reason,  no person or
entity is obligated to provide any additional  support or credit enhancement for
the offered certificates.

                                LEGAL INVESTMENT

     The  [Class  A  Certificates  and  Class M  Certificates]  will  constitute
"mortgage related securities" for purposes of SMMEA so long as they are rated in
at least the second highest rating category by one of the Rating Agencies,  and,
as such,  are legal  investments  for entities to the extent  provided in SMMEA.
SMMEA provides, however, that states could override its



                                      S-46
<PAGE>


provisions on legal investment and restrict or condition  investment in mortgage
related  securities by taking  statutory  action on or prior to October 3, 1991.
Some states have enacted  legislation which overrides the preemption  provisions
of SMMEA.

     The depositor makes no representations as to the proper characterization of
any class of the offered certificates for legal investment or other purposes, or
as to the ability of  particular  investors to purchase any class of the offered
certificates under applicable legal investment restrictions. These uncertainties
may  adversely  affect  the  liquidity  of any  class of  offered  certificates.
Accordingly,  all institutions whose investment  activities are subject to legal
investment laws and regulations,  regulatory  capital  requirements or review by
regulatory  authorities  should consult with their legal advisors in determining
whether and to what extent any class of the offered  certificates  constitutes a
legal investment or is subject to investment, capital or other restrictions.

See "Legal Investment" in the prospectus.



                                      S-47
<PAGE>



                              ERISA CONSIDERATIONS

     Any ERISA  plan,  any  insurance  company,  whether  through its general or
separate  accounts or any other person  investing ERISA plan assets of any ERISA
plan, as defined under "ERISA  Considerations--Plan  Assets  Regulations" in the
prospectus, should carefully review with its legal advisors whether the purchase
or holding of offered  certificates could give rise to a transaction  prohibited
or not otherwise permissible under ERISA or Section 4975 of the Internal Revenue
Code.

     The purchase or holding of the offered certificates, other than the Class M
Certificates or the Class R Certificates, by or on behalf of, or with ERISA plan
assets  of,  an  ERISA  plan  may  qualify  for   exemptive   relief  under  the
underwriter's  prohibited  transaction  exemption,  as  described  under  "ERISA
Considerations--Underwriter's  PTE" in the  prospectus.  However,  the exemption
contains a number of  conditions  which must be met for the  exemption to apply,
including the requirement  that the ERISA plan must be an "accredited  investor"
as defined in Rule  501(a)(1)  of  Regulation D of the  Securities  and Exchange
Commission under the Securities Act.

     [Insurance companies contemplating the investment of general account assets
in the offered  certificates  should  consult with their legal  advisors for the
applicability   of  Section   401(c)  of  ERISA,   as  described   under  "ERISA
Considerations--Insurance  Company General Accounts" in the prospectus.  The DOL
issued final  regulations  under  Section  401(c) on January 4, 2000,  but these
final regulations are not applicable until July 5, 2001.]

     Because  the  exemptive  relief  afforded by the  exemption  or any similar
exemption that might be available will not likely apply to the purchase, sale or
holding of the Class M  Certificates,  no Class M  Certificate  or any  interest
therein may be acquired or held by any ERISA plan,  any trustee or other  person
acting on behalf of any ERISA plan,  or any other person using ERISA plan assets
to effect the acquisition or holding - a plan investor - unless:

     o    the acquirer or holder is an insurance company,

     o    the  source  of  funds  used to  acquire  or hold the  certificate  or
          interest therein is an "insurance  company general account" as defined
          in U.S.  Department of Labor  Prohibited  Transaction  Class Exemption
          95-60, and

     o    the conditions Sections I and III of PTCE 95-60 have been satisfied.

     Each  beneficial  owner of a Class M  Certificate  or any interest  therein
shall be deemed to have represented,  by virtue of its acquisition or holding of
the certificate or interest  therein,  that either (i) it is not a Plan Investor
or (ii) (1) it is an insurance company,  (2) the source of funds used to acquire
or hold the  certificate or interest  therein is an "insurance  company  general
account" as the term is defined in PTCE 95-60, and (3) the conditions  listed in
Sections I and III of PTCE 95-60 have been satisfied.

     If any Class M Certificate  or any interest  therein is acquired or held in
violation of the  provisions  of the  preceding  paragraph,  the next  preceding
permitted beneficial owner will be



                                      S-48
<PAGE>



treated as the beneficial  owner of the Class M Certificate,  retroactive to the
date of transfer to the purported  beneficial  owner.  Any purported  beneficial
owner whose  acquisition or holding of any  certificate or interest  therein was
effected  in  violation  of the  provisions  of the  preceding  paragraph  shall
indemnify  and hold  harmless the  depositor,  the trustee,  the  servicer,  any
subservicer  and the trust from and  against  any and all  liabilities,  claims,
costs or expenses  incurred by those parties as a result of that  acquisition or
holding.

     Investors in the Class M Certificates are urged to obtain from a transferee
of  those  certificates  a  certification  of the  transferee's  eligibility  to
purchase the certificates in the form of the  representation  letter attached as
Annex I to this prospectus supplement.

     Because  the  exemptive  relief  afforded by the  exemption  or any similar
exemption  that might be available  also will not likely apply to the  purchase,
sale or holding of the Class R  Certificates,  transfers  of those  certificates
will not be  registered  by the  trustee  unless  the  transferor  provides  the
depositor  and the trustee with a  certification  that the  transferee  is not a
ERISA plan investor.

     Any fiduciary of an ERISA plan considering  whether to purchase any offered
certificate  should consult with its own counsel  concerning the impact of ERISA
and the Internal  Revenue Code and the  potential  consequences  to its specific
circumstances, prior to making an investment in the certificates. Moreover, each
ERISA plan  fiduciary  should  determine  whether,  under the general  fiduciary
standards of  investment  procedure  and  diversification,  an investment in the
offered  certificate is appropriate for the ERISA plan,  taking into account the
overall  investment  policy of the ERISA plan and the  composition  of the ERISA
plan's investment portfolio.

     In  addition,  any  fiduciary  or other  investor of ERISA plan assets that
proposes to acquire or hold the offered  certificates on behalf of or with ERISA
plan assets of any ERISA plan should  consult  with its counsel with respect to:
(i) whether the specific and general  conditions and the other  requirements  in
the exemption or any other  exemption  would be satisfied,  or whether any other
prohibited   transaction   exemption   would  apply;   and  (ii)  the  potential
applicability of the general  fiduciary  responsibility  provisions of ERISA and
the prohibited  transaction provisions of ERISA and Section 4975 of the Internal
Revenue  Code to the  proposed  investment.  See "ERISA  Considerations"  in the
prospectus.

     The  sale of any of the  offered  certificates  to an  ERISA  plan is in no
respect a representation by the depositor or the underwriter that the investment
meets all relevant legal  requirements  for investments by ERISA plans generally
or any  particular  ERISA plan, or that such an investment  is  appropriate  for
ERISA plans generally or any particular ERISA plan.



                                      S-49
<PAGE>

                                     ANNEX I

                           ERISA REPRESENTATION LETTER

                                     [date]

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

Credit Suisse First Boston Mortgage Securities Corp.
11 Madison Avenue
New York, New York 10010
Attention: General Counsel

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

       Re:  [__________________________]
            Mortgage-Backed Pass-Through Certificates, Series 200_-__, Class M-

Dear Ladies and Gentlemen:

     [__________________________],  (the  "Purchaser")  intends to purchase from
[______], (the "Seller")  $[____________________]  initial Certificate Principal
Balance  of  the  above-referenced  certificates  (the  "Certificates"),  issued
pursuant to the Pooling and  Servicing  Agreement  (the  "Pooling and  Servicing
Agreement"),  dated as of  [_______] 1, 200_,  among Credit  Suisse First Boston
Mortgage     Securities     Corp.,     as    depositor    (the     "Depositor"),
[__________________________].,  as  seller  and  servicer  (the  "Company")  and
[________________________],  as trustee (the "Trustee").  All terms used in this
prospectus  supplement  and not  otherwise  defined  shall have the meanings set
forth in the Pooling and Servicing Agreement.

     The Purchaser hereby  certifies,  represents and warrants to, and covenants
with the Depositor, the Company and the Trustee, either:

          (a) The Purchaser is not an employee  benefit or other plan subject to
     the prohibited  transaction  provisions of the Employee  Retirement  Income
     Security Act of 1974, as amended ("ERISA"), or Section 4975 of the Internal
     Revenue Code of 1986, as amended (a "Plan"), or any other person (including
     an investment  manager, a named fiduciary or a trustee of any Plan) acting,
     directly or  indirectly,  on behalf of or purchasing any  Certificate  with
     "plan  assets" of any Plan  within the  meaning of the U.S.  Department  of
     Labor ("DOL") regulation at 29 C.F.R.ss.2510.3-101; or

          (b) The Purchaser is an insurance  company,  the source of funds to be
     used by which to purchase the Certificates is an "insurance company general
     account"  (as such term is  defined  in



                                      S-50
<PAGE>



     DOL  Prohibited  Transaction  Class  Exemption  ("PTCE")  95-60),  and  the
     conditions  set  forth  in  Sections  I and III of  PTCE  95-60  have  been
     satisfied.

In addition,  the Purchaser  hereby  certifies,  represents and warrants to, and
covenants  with, the  Depositor,  the Company and the Trustee that the Purchaser
will not transfer  the  Certificates  to any Plan or person  unless such Plan or
person meets the requirements set forth in either (a) or (b) above.

                                Very truly yours,




                                By:________________________________



                                Name:______________________________



                                Title:_____________________________







                                      S-51
<PAGE>


                                [_______________]

                                  $___________

                    Mortgage-Backed Pass-Through Certificates

                                 Series 200_-___

                              Prospectus Supplement

                                  CREDIT FIRST

                                  SUISSE BOSTON

                                   Underwriter

You should rely only on the  information  contained or incorporated by reference
in this  prospectus  supplement  and the  accompanying  prospectus.  We have not
authorized anyone to provide you with different information.

We are not  offering  the  certificates  in any  state  where  the  offer is not
permitted.

We represent the accuracy of the information in this  prospectus  supplement and
the accompanying prospectus only as of the dates on their respective covers.

Dealers will be required to deliver a prospectus  supplement and prospectus when
acting as  underwriters of the  certificates  offered hereby and with respect to
their unsold allotments or subscriptions.  In addition,  all dealers selling the
offered  certificates,  whether or not  participating  in this offering,  may be
required   to   deliver   a   prospectus   supplement   and   prospectus   until
[____________________, 200_].





THE  INFORMATION IN THIS  PROSPECTUS IS NOT COMPLETE AND MAY BE CHANGED.  WE MAY
NOT SELL  THESE  SECURITIES  UNTIL THE  REGISTRATION  STATEMENT  FILED  WITH THE
SECURITIES AND EXCHANGE COMMISSION IS EFFECTIVE. THIS PROSPECTUS IS NOT AN OFFER
TO  SELL  THESE  SECURITIES  AND IT IS NOT  SOLICITING  AN  OFFER  TO BUY  THESE
SECURITIES IN ANY STATE WHERE THE OFFER OR SALE IS NOT PERMITTED.

Prospectus

Conduit Mortgage and Manufactured Housing Contract
Pass-Through Certificates

Credit Suisse First Boston Mortgage Securities Corp.

Depositor

The depositor may periodically  form separate trust funds to issue securities in
series, secured by assets of that trust fund.

Offered Securities. The  securities  in a series will consist of  certificates
                    representing interests in a trust fund and will be paid only
                    from the assets of that trust fund.  Each series may include
                    multiple classes of securities with differing  payment terms
                    and priorities.  Credit enhancement will be provided for all
                    offered securities.

Trust Assets.        Each trust fund will consist primarily of:

                  o     mortgage loans secured by one- to four-family
                        residential properties;

                  o     mortgage loans secured by multifamily
                        residential rental properties consisting of
                        five or more dwelling units;

                  o     mortgage loans secured by commercial real
                        estate properties;

                  o     mortgage loans secured by mixed residential
                        and commercial real estate properties;

                  o     loans secured by unimproved land;

                  o     loans made to finance  the  purchase  of certain  rights
                        relating to cooperatively  owned  properties  secured by
                        the pledge of shares issued by a cooperative corporation
                        and the assignment of the proprietary lease or occupancy
                        agreement  providing  the  exclusive  right to  occupy a
                        particular dwelling unit;

                  o     manufactured housing installment sales
                        contracts and installment loan agreements; or

                  o     mortgage or asset-backed securities backed
                        by, and whole or partial participations in,
                        the types of assets listed above.

Neither  the  Securities  and  Exchange  Commission  nor  any  state  securities
commission has approved or disapproved  of these  securities or determined  that
this prospectus is accurate or complete. Any representation to the contrary is a
criminal offense.

May __, 2000


<PAGE>
             Important notice about information presented in this
             prospectus and the accompanying prospectus supplement

We provide  information to you about the certificates in two separate  documents
that provide progressively more detail:

o    this prospectus, which provides general information,  some of which may not
     apply to your series of certificates; and

o    the accompanying prospectus supplement,  which describes the specific terms
     of your series of certificates.

You should  rely only on the  information  provided in this  prospectus  and the
accompanying  prospectus supplement,  including the information  incorporated by
reference.  We  have  not  authorized  anyone  to  provide  you  with  different
information.  We are not offering the  certificates in any state where the offer
is not permitted.

If the description of your securities in the accompanying  prospectus supplement
differs from the related description in this prospectus,  you should rely on the
information in that prospectus supplement.

Some capitalized terms used in this prospectus are defined in the section titled
"Glossary" beginning on page 104 of this prospectus.

We include  cross-references in this prospectus and the accompanying  prospectus
supplement  to captions in these  materials  where you can find further  related
discussions.  The following table of contents and the table of contents included
in the  accompanying  prospectus  supplement  provide  the pages on which  these
captions are located.



                                       2
<PAGE>



                                Table of Contents

                                                               Page


The Trust Fund....................................................5
      The Mortgage Pools..........................................5
      Underwriting Standards for Mortgage Loans..................10
      Qualifications of Unaffiliated Sellers.....................13
      Representations by Unaffiliated Sellers; Repurchases.......13
      Mortgage Certificates......................................14
      The Contract Pools.........................................15
      Underwriting Standards for Contracts.......................16
      Pre-Funding................................................16
The Depositor....................................................17
Use of Proceeds..................................................17
Yield Considerations.............................................17
Maturity and Prepayment Considerations...........................20
Description of the Certificates..................................22
      General....................................................22
      Form of Certificates.......................................24
      Distributions of Principal and Interest....................26
      Assignment of Mortgage Loans...............................27
      Assignment of Contracts....................................29
      Assignment of Mortgage Certificates........................31
      Servicing of Mortgage Loans and Contracts..................31
      Payments on Mortgage Loans.................................32
      Payments on Contracts......................................33
      Collection of Payments on Mortgage Certificates............34
      Distributions on Certificates..............................34
      Special Distributions......................................35
      Reports to Certificateholders..............................36
      Advances...................................................36
      Collection and Other Servicing Procedures..................37
      Standard Hazard Insurance..................................38
      Special Hazard Insurance...................................39
      Pool Insurance.............................................39
      Primary Mortgage Insurance.................................39
      Mortgagor Bankruptcy Bond..................................40
      Presentation of Claims.....................................40
      Enforcement of Due-on-Sale Clauses; Realization
      Upon Defaulted Mortgage Loans..............................41
      Enforcement of "Due-on-Sale" Clauses;
      Realization Upon Defaulted Contracts.......................42
      Servicing Compensation and Payment of Expenses.............42
      Evidence as to Compliance..................................43
      Certain Matters Regarding the Servicer, the
      Depositor, the Trustee and the Special Servicer............44
      Events of Default..........................................45
      Rights Upon Event of Default...............................45
      Amendment..................................................45
      Termination................................................46
Credit Support...................................................47
      Financial Guaranty Insurance
           Policies; Surety Bonds................................47
      Letters of Credit..........................................48
      Subordinated Certificates..................................49
      Shifting Interest..........................................49
      Overcollateralization......................................49
      Swaps and Yield Supplement
           Agreements............................................49
      Purchase Obligations.......................................50

                                       3
<PAGE>

      Reserve Fund..............................................50
      Performance Bond..........................................52
Description of Insurance........................................52
      Primary Mortgage Insurance Policies.......................52
      FHA Insurance and VA Guarantees...........................54
      Standard Hazard Insurance Policies on Mortgage Loans......55
      Standard Hazard Insurance Policies on the
      Manufactured Homes........................................56
      Pool Insurance Policies...................................57
      Special Hazard Insurance Policies.........................59
      Mortgagor Bankruptcy Bond.................................60
Certain Legal Aspects of the Mortgage Loans and Contracts.......60
      The Mortgage Loans........................................60
      The Manufactured Housing Contracts........................68
      Enforceability of Certain Provisions......................70
      Consumer Protection Laws..................................70
      Applicability of Usury Laws...............................71
      Environmental Legislation.................................71
      Soldiers' and Sailors' Civil Relief Act of 1940...........72
      Default Interest and Limitations on Prepayments...........72
      Forfeitures in Drug and RICO Proceedings..................73
      Negative Amortization Loans...............................73
Material Federal Income Tax Consequences........................73
      General...................................................73
      Classification of REMICs and FASITs.......................74
      Taxation of Owners of REMIC and FASIT Regular
      Certificates..............................................75
      Taxation of Owners of REMIC Residual Certificates.........82
      Backup Withholding with Respect to Securities.............90
      Foreign Investors in Regular Certificates.................90
      Non-REMIC Trust Funds.....................................92
State and Other Tax Consequences................................95
ERISA Considerations............................................95
      Plan Assets Regulation....................................96
      Underwriter's PTE.........................................96
      General Considerations....................................98
      Insurance Company General Accounts........................99
Legal Investment................................................99
Plan of Distribution...........................................101
Legal Matters..................................................102
Financial Information..........................................102
Additional Information.........................................102
Reports to Certificateholders102
Incorporation of Certain Information by Reference..............102
Ratings........................................................103
Glossary.......................................................104


                                       4
<PAGE>

                                 The Trust Fund

     Ownership of the mortgage or contract pool included in the trust fund for a
series of certificates  may be evidenced by one or more classes of certificates,
which may consist of one or more  subclasses,  as  described  in the  prospectus
supplement for each series of  certificates.  Each certificate will evidence the
undivided  interest,  beneficial  interest or notional  amount  specified in the
related prospectus  supplement in a mortgage pool containing mortgage loans or a
contract pool containing  manufactured  housing  installment  sales contracts or
installment loan agreements,  or contracts.  If stated in the related prospectus
supplement, each class or subclass of the certificates of a series will evidence
the percentage  interest specified in the related  prospectus  supplement in the
payments of principal and interest on the mortgage loans in the related mortgage
pool or on the contracts in the related contract pool.

     To the extent specified in the related prospectus supplement, each mortgage
pool or contract pool,  with respect to a series will be covered by some form of
credit enhancement. Types of credit enhancement that may be used include:

o    financial guaranty insurance policies or surety bonds;

o    letters of credit;

o    pool insurance policies;

o    special hazard insurance policies;

o    mortgagor bankruptcy bonds;

o    the  subordination  of the  rights  of  the  holders  of  the  subordinated
     certificates  of a  series  to the  rights  of the  holders  of the  senior
     certificates  of that series,  which,  if stated in the related  prospectus
     supplement, may include certificates of a subordinated class or subclass;

o    the establishment of a reserve fund;

o    by the  right of one or more  classes  or  subclasses  of  certificates  to
     receive a disproportionate amount of certain distributions of principal;

o    another  form or forms of  Alternative  Credit  Support  acceptable  to the
     related Rating Agency; or

o    by any combination of the foregoing.

See "Description of Insurance" and "Credit Support" in this prospectus.

The Mortgage Pools

     General.  If stated in the prospectus  supplement with respect to a series,
the trust fund for that series may include:

     (1)  one or more mortgage pools containing:

o    conventional one- to four-family residential,  first and/or second mortgage
     loans,

o    Cooperative  Loans made to finance the purchase of certain rights  relating
     to cooperatively owned properties secured by the pledge of shares issued by
     a  Cooperative  and the  assignment  of a  proprietary  lease or  occupancy
     agreement providing the exclusive right to occupy a particular  Cooperative
     Dwelling,

o    mortgage loans secured by multifamily property,

o    mortgage loans secured by commercial property,

o    mortgage loans secured by Mixed-Use Property,

o    mortgage loans secured by unimproved land,

                                       5
<PAGE>

o    mortgage participation certificates or pass-through certificates evidencing
     interests in those loans that are  acceptable to the related Rating Agency,
     or

o    mortgage pass-through certificates issued by one or more trusts established
     by one or more private entities;

      (2)  one  or  more  contract   pools   containing   manufactured   housing
           conditional  sales  contracts  and  installment  loan  agreements  or
           participation  certificates or pass-through certificates representing
           interests in those contracts; or

      (3)  any combination of the foregoing.

The mortgage loans and contracts, will be newly originated or seasoned, and will
be purchased by the depositor,  Credit Suisse First Boston  Mortgage  Securities
Corp.,  either  directly or through  affiliates,  from one or more affiliates or
sellers unaffiliated with the depositor.

     All  mortgage  loans will be  evidenced by Mortgage  Notes.  Single  family
property  will  consist  of  one-  to  four-family  residential  dwelling  units
including  single family  detached homes,  attached  homes,  single family units
having a common wall, individual units located in condominiums,  and Cooperative
Dwellings  and such other type of homes or units as are set forth in the related
prospectus supplement. Multi-family property may include multifamily residential
rental  properties  and  apartment   buildings  owned  by  cooperative   housing
corporations.  Each  detached or attached home or  multifamily  property will be
constructed  on land owned in fee simple by the  mortgagor  or on land leased by
the mortgagor.  Attached homes may consist of duplexes, triplexes and fourplexes
(multifamily  structures  where each mortgagor owns the land upon which the unit
is built with the remaining adjacent land owned in common). Multifamily property
may include,  and  Mixed-Use  Property  will consist of,  mixed  commercial  and
residential   buildings.   The  mortgaged   properties  may  include  investment
properties  and vacation and second homes.  Commercial  property will consist of
income-producing  commercial  real estate.  Mortgage loans secured by commercial
property,  multifamily property and Mixed-Use Property may also be secured by an
assignment  of leases  and rents and  operating  or other  cash flow  guarantees
relating to the  mortgaged  properties  to the extent  specified  in the related
prospectus supplement.

     If stated in the related prospectus supplement, a mortgage pool may contain
mortgage  loans  with  adjustable  mortgage  rates.  Any  mortgage  loan with an
adjustable  mortgage rate may provide that on the day on which the mortgage rate
adjusts,  the  amount  of the  monthly  payments  on the  mortgage  loan will be
adjusted  to provide for the payment of the  remaining  principal  amount of the
mortgage loan with level  monthly  payments of principal and interest at the new
mortgage  rate to the maturity  date of the mortgage  loan.  Alternatively,  the
mortgage  loan may provide that the mortgage rate adjusts more  frequently  than
the monthly  payment.  As a result,  a greater or lesser  portion of the monthly
payment will be applied to the payment of principal on the mortgage  loan,  thus
increasing  or  decreasing  the rate at which the mortgage  loan is repaid.  See
"Yield  Considerations"  in this prospectus.  In the event that an adjustment to
the mortgage  rate causes the amount of interest  accrued in any month to exceed
the  amount  of the  monthly  payment  on such  mortgage  loan,  the  excess  or
"deferred" interest will be added to the principal balance of the mortgage loan,
unless  otherwise paid by the mortgagor,  and will bear interest at the mortgage
rate in effect  from time to time.  The  amount  by which the  mortgage  rate or
monthly  payment may increase or decrease and the  aggregate  amount of deferred
interest  on any  mortgage  loan  may be  subject  to  certain  limitations,  as
described in the related prospectus supplement.

     If stated in the prospectus supplement for the related series, the mortgage
rate on certain  adjustable  rate  mortgage  loans will be  convertible  from an
adjustable  rate to a fixed rate, at the option of the  mortgagor  under certain
circumstances.  If stated in the  related  prospectus  supplement,  the  related
pooling and  servicing  agreement  will  provide  that the seller from which the
depositor  acquired  the  convertible  adjustable  rate  mortgage  loans will be
obligated to repurchase from the trust fund any adjustable rate mortgage loan as
to which the conversion option has been exercised, at a purchase price set forth
in the related prospectus  supplement.  The amount of the purchase price will be
required to be deposited in the  Certificate  Account and will be distributed to
the certificateholders on the distribution date in the month following the month
of the exercise of the conversion  option.  The obligation of the related seller
to  repurchase  converted  adjustable  rate  mortgage  loans  may or may  not be
supported by cash, letters of credit, insurance policies, third party guarantees
or other similar arrangements.

                                       6
<PAGE>

     A  mortgage  pool  may  include  VA Loans or FHA  Loans.  VA Loans  will be
partially  guaranteed by the United States Department of Veteran's  Affairs,  or
VA,  under  the  Servicemen's   Readjustment  Act  of  1944,  as  amended.   The
Servicemen's  Readjustment  Act of 1944,  as amended,  permits a veteran,  or in
certain  instances the spouse of a veteran,  to obtain a mortgage loan guarantee
by the VA covering  mortgage  financing of the purchase of a one- to four-family
dwelling unit at interest rates permitted by the VA. The program has no mortgage
loan  limits,  requires  no down  payment  from the  purchasers  and permits the
guarantee of mortgage  loans of up to 30 years'  duration.  However,  no VA Loan
will have an original  principal  amount  greater than five times the partial VA
guarantee for such VA Loan. The maximum guarantee that may be issued by VA under
this  program  is 50% of the  principal  amount  of  the  mortgage  loan  if the
principal  amount of the mortgage loan is $45,000 or less, the lesser of $36,000
and 40% of the principal  amount of the mortgage loan if the principal amount of
the  mortgage  loan is greater  than $45,000 but less than or equal to $144,000,
and the lesser of $46,000 and 25% of the  principal  amount of the mortgage loan
if the principal amount of the mortgage loan is greater than $144,000.

     FHA Loans will be insured by the Federal Housing Administration, or FHA, as
authorized  under the National  Housing Act, as amended,  and the United  States
Housing Act of 1937,  as amended.  FHA Loans will be insured  under  various FHA
programs including the standard FHA 203-b programs to finance the acquisition of
one-to four-family housing units, the FHA 245 graduated payment mortgage program
and the FHA 221 and 223  programs  to finance  certain  multifamily  residential
rental  properties.  FHA  Loans  generally  require a minimum  down  payment  of
approximately  5% of the original  principal amount of the FHA Loan. No FHA Loan
may have an interest rate or original  principal amount exceeding the applicable
FHA limits at the time of origination of such FHA Loan.

     With respect to any trust fund that contains mortgage loans, the prospectus
supplement  for the series of  certificates  related to that  trust  fund,  will
contain  information  as to the type of mortgage  loans that will  comprise  the
related  mortgage  pool.  The related  prospectus  supplement  will also contain
information as to:

o    the aggregate  principal balance of the mortgage loans as of the applicable
     Cut-off Date,

o    the type of mortgaged  properties  securing the mortgage loans, o the range
     of original terms to maturity of the mortgage loans,

o    the range of  principal  balances  and  average  principal  balance  of the
     mortgage loans,

o    the  earliest  origination  date and latest  maturity  date of the mortgage
     loans,

o    the  aggregate  principal  balance of mortgage  loans having  loan-to-value
     ratios at origination exceeding 80%,

o    the interest rate or range of interest rates borne by the mortgage loans,

o    the geographical distribution of the mortgage loans,

o    the  aggregate  principal  balance  of  Buy-Down  Loans  or GPM  Loans,  if
     applicable,

o    the delinquency status of the mortgage loans as of the Cut-off Date,

o    with respect to adjustable rate mortgage loans,  the adjustment  dates, the
     highest,  lowest  and  weighted  average  margin,  the  limitations  on the
     adjustment of the interest rates on any  adjustment  date and over the life
     of the loans, and

o    whether the mortgage  loan provides for an interest only period and whether
     the  principal  amount  of that  mortgage  loan is fully  amortizing  or is
     amortized on the basis of a period of time that extends beyond the maturity
     date of the mortgage loan.

The aggregate principal balance of the mortgage loans or contracts in a mortgage
pool or contract pool as stated in the related prospectus  supplement is subject
to a permitted variance of plus or minus 5%.

     No  assurance  can be given that values of the  mortgaged  properties  in a
mortgage  pool have  remained  or will  remain  at their  levels on the dates of
origination  of the related  mortgage  loans.  If the real estate  market should
experience  an overall  decline in  property  values  such that the  outstanding
balances of the mortgage loans and any

                                       7
<PAGE>

secondary  financing on the mortgaged  properties in a particular  mortgage pool
become  equal to or  greater  than the value of the  mortgaged  properties,  the
actual  rates of  delinquencies,  foreclosures  and losses  could be higher than
those now generally  experienced in the mortgage lending industry.  In addition,
the value of property  securing  Cooperative Loans and the delinquency rate with
respect  to  Cooperative  Loans  could  be  adversely  affected  if the  current
favorable  tax  treatment  of  cooperative  stockholders  were  to  become  less
favorable.  See "Certain Legal Aspects of the Mortgage Loans and  Contracts--The
Mortgage  Loans" in this  prospectus.  To the  extent  that such  losses are not
covered by the methods of credit support or the insurance  policies described in
this prospectus or by Alternative Credit Support,  they will be borne by holders
of the certificates of the series  evidencing  interests in the related mortgage
pool.

     The depositor will cause the mortgage loans constituting each mortgage pool
to be assigned to the trustee named in the applicable prospectus supplement, for
the benefit of the holders of the certificates of that series. The servicer,  if
any, named in the related prospectus supplement will service the mortgage loans,
either by itself or through other mortgage servicing institutions,  if any, or a
special  servicer,  if any,  pursuant to a pooling and servicing  agreement,  as
described in this prospectus,  among the servicer, the special servicer, if any,
the depositor and the trustee,  or a separate  servicing  agreement  between the
servicer  and the  depositor  and will  receive  a fee for those  services.  See
"--Mortgage  Loan  Program"  and  "Description  of  the  Certificates"  in  this
prospectus. With respect to those mortgage loans serviced by a special servicer,
the special  servicer will be required to service the related  mortgage loans in
accordance  with a  servicing  agreement  between the  servicer  and the special
servicer,  and will  receive the fee for the  services  specified in the related
agreement;   however,   the  servicer  will  remain  liable  for  its  servicing
obligations  under the pooling and servicing  agreement as if the servicer alone
were servicing the related mortgage loans.

     If stated in the applicable prospectus supplement,  the depositor will make
certain limited representations and warranties regarding the mortgage loans, but
its  assignment of the mortgage  loans to the trustee will be without  recourse.
See "Description of the  Certificates--Assignment of Mortgage Loans." The seller
of the  Mortgage  Loans  will  also make  certain  limited  representations  and
warranties  with  respect to the  Mortgage  Loans.  See "--  Representations  by
Unaffiliated Sellers;  Repurchases." The servicer's  obligations with respect to
the  mortgage  loans  will  consist  principally  of its  contractual  servicing
obligations under the related pooling and servicing agreement. This will include
its obligation to enforce certain purchase and other  obligations of any special
servicer,  subservicers and/or sellers unaffiliated with the depositor,  as more
fully    described    in    this    prospectus     under     "--Mortgage    Loan
Program--Representations by Unaffiliated Sellers;  Repurchases," "Description of
the Certificates--Assignment of Mortgage Loans" and "--Servicing by Unaffiliated
Sellers," and its obligations to make Advances in the event of  delinquencies in
payments  on or  with  respect  to the  mortgage  loans  or in  connection  with
prepayments and liquidations of the mortgage loans, in amounts described in this
prospectus  under  "Description  of the  Certificates--Advances."  Advances with
respect to delinquencies  will be limited to amounts that the servicer  believes
ultimately  would  be  reimbursable  under  any  applicable  financial  guaranty
insurance  policy or surety  bond,  letter of  credit,  pool  insurance  policy,
special hazard insurance  policy,  mortgagor  bankruptcy bond or other policy of
insurance,  from  amounts  in the  related  reserve  fund,  if  any,  under  any
Alternative Credit Support or out of the proceeds of liquidation of the mortgage
loans,  cash in the Certificate  Account or otherwise.  See  "Description of the
Certificates--Advances," "Credit Support" and "Description of Insurance" in this
prospectus.

     Single Family Mortgage  Loans.  The applicable  prospectus  supplement will
specify the types of mortgaged properties securing single family mortgage loans,
the  original  principal  balances  of the single  family  mortgage  loans,  the
original maturities of such mortgage loans and the loan-to-value  ratios of such
mortgage loans.  Single family mortgage loans may be  fully-amortizing  mortgage
loans or balloon mortgage loans. If stated in the related prospectus supplement,
a mortgage pool may also include  adjustable rate mortgage loans with a mortgage
interest rate  adjusted  periodically,  with  corresponding  adjustments  in the
amount of monthly payments,  to equal the sum, which may be rounded,  of a fixed
margin and an index  described  in that  prospectus  supplement,  subject to any
applicable  restrictions  on those  adjustments.  The  mortgage  pools  may also
include other types of single family  mortgage  loans to the extent set forth in
the applicable prospectus supplement.

     If provided for in the applicable  prospectus  supplement,  a mortgage pool
may contain  Buy-Down Loans.  The resulting  difference in payment on a Buy-Down
Loan shall be  compensated  for from amounts on deposit in the related  Buy-Down
Fund. In lieu of a cash deposit, if stated in the related prospectus supplement,
a letter of credit or  guaranteed  investment  contract  may be delivered to the
trustee to fund the Buy-Down Fund. See "Description of the


                                       8
<PAGE>

Certificates--Payments  on Mortgage  Loans" in this  prospectus.  Buy-Down Loans
included in a mortgage  pool will  provide for a reduction  in monthly  interest
payments by the mortgagor for a period of up to the first four years of the term
of such mortgage loans.

     If provided for in the applicable  prospectus  supplement,  a mortgage pool
may  contain  GPM Loans.  If stated in the related  prospectus  supplement,  the
resulting  difference  in payment on a GPM Loan  shall be  compensated  for from
amounts on deposit in the GPM Fund. In lieu of cash  deposit,  the depositor may
deliver to the  trustee a letter of credit,  guaranteed  investment  contract or
another instrument acceptable to the related Rating Agency to fund the GPM Fund.

     If  specified in the related  prospectus  supplement,  a mortgage  pool may
contain  "re-performing  loans", which includes previously delinquent loans that
have been brought  current,  mortgage loans that are subject to a repayment plan
or bankruptcy  plan, and that had arrearages of at least three monthly  payments
when the repayment plan or bankruptcy  plan was entered into, and mortgage loans
that have been  modified.  These mortgage loans may be acquired by the depositor
from a wide  variety of sources  through  bulk or  periodic  sales.  The rate of
default on  re-performing  mortgage loans may be higher than the rate of default
on mortgage loans that have not previously been in arrears.

     If specified in the applicable  prospectus  supplement,  the mortgage loans
may include "step-down"  mortgage loans, which permit the servicer to reduce the
interest  rate on the  mortgage  loan if the  borrower  has been  current in its
monthly  payments of principal  and  interest.  The amount by which the mortgage
rate may be reduced and the period during which the mortgage loan must have been
current will be specified in the mortgage note.

     Commercial,  Multifamily  and  Mixed-Use  Mortgage  Loans.  The  commercial
mortgage  loans,  multifamily  mortgage loans and Mixed-Use  Mortgage Loans will
consist of mortgage loans secured by first or junior  mortgages,  deeds of trust
or similar  security  instruments on, or installment  contracts for the sale of,
fee  simple  or  leasehold   interests  in  commercial  real  estate   property,
multifamily  residential  property,  cooperatively owned multifamily  properties
and/or mixed  residential  and  commercial  property,  and related  property and
interests.  Commercial  mortgage  loans will not represent  more than 10% of the
aggregate principal balance of any mortgage pool as of the related Cut-off Date.

     Certain of the commercial mortgage loans, multifamily mortgage loans and
Mixed-Use  Mortgage Loans may be Simple Interest Loans, and other mortgage loans
may provide for payment of interest in advance rather than in arrears.

     The commercial  mortgage  loans,  multifamily  mortgage loans and Mixed-Use
Mortgage  Loans may also be  secured  by one or more  assignments  of leases and
rents,  management  agreements or operating agreements relating to the mortgaged
property and in some cases by certain letters of credit,  personal guarantees or
both.  Pursuant to an  assignment  of leases and rents,  the  related  mortgagor
assigns its right,  title and interest as landlord  under each related lease and
the income derived therefrom to the related lender, while retaining a license to
collect the rents for so long as there is no default. If the mortgagor defaults,
the license  terminates  and the related lender is entitled to collect the rents
from tenants to be applied to the monetary  obligations of the mortgagor.  State
law may limit or restrict the  enforcement of the assignment of leases and rents
by a lender until the lender takes possession of the related mortgaged  property
and a receiver is appointed.  See "Certain  Legal Aspects of the Mortgage  Loans
and Contracts--Leases and Rents" in this prospectus.

     The  prospectus  supplement  relating  to  each  series  will  specify  the
originator or originators relating to the commercial mortgage loans, multifamily
mortgage loans and Mixed-Use  Mortgage Loans,  which may include,  among others,
commercial banks, savings and loan associations,  other financial  institutions,
insurance companies or real estate developers and, to the extent available,  the
underwriting criteria in connection with originating the related mortgage loans.

     Commercial,  multifamily  and  mixed-use  real estate  lending is generally
viewed as exposing the lender to a greater risk of loss than one- to four-family
residential lending.  Commercial,  multifamily and mixed-use real estate lending
typically  involves  larger  loans to single  borrowers  or  groups  of  related
borrowers than residential one- to four-family mortgage loans. Furthermore,  the
repayment of loans secured by income producing properties is


                                       9
<PAGE>

typically  dependent  upon the  successful  operation of the related real estate
project.  If the cash flow from the project is reduced,  for example,  if leases
are not  obtained or renewed,  the  borrower's  ability to repay the loan may be
impaired.  Commercial,  multifamily  and  mixed-use  real estate can be affected
significantly  by supply  and  demand  in the  market  for the type of  property
securing the loan and, therefore, may be subject to adverse economic conditions.
Market  values  may  vary  as  a  result  of  economic  events  or  governmental
regulations  outside the control of the borrower or lender, such as rent control
laws,  which impact the future cash flow of the property.  Corresponding  to the
greater  lending  risk  is  a  generally  higher  interest  rate  applicable  to
commercial, multifamily and mixed-use real estate lending.

     Balloon Loans. A mortgagor's ability to pay the balloon amount at maturity,
which,  based on the  amortization  schedule of those loans, is expected to be a
substantial  amount,  will typically depend on the mortgagor's ability to obtain
refinancing of the related mortgage loan or to sell the mortgaged property prior
to the  maturity of the balloon  loan.  The ability to obtain  refinancing  will
depend on a number of  factors  prevailing  at the time  refinancing  or sale is
required,  including,  without  limitation,  real estate values, the mortgagor's
financial  situation,  the level of available  mortgage loan interest rates, the
mortgagor's  equity in the  related  mortgaged  property,  tax laws,  prevailing
general  economic  conditions  and the terms of any related  first lien mortgage
loan.  Neither the  depositor,  the servicer or  subservicer,  the  trustee,  as
applicable,  nor any of their  affiliates  will be  obligated  to  refinance  or
repurchase any mortgage loan or to sell the mortgaged property.

     Simple  Interest  Loans.  If  specified  in  the  accompanying   prospectus
supplement,  a portion of the loans  underlying  a series of  securities  may be
simple interest  loans. A simple interest loan provides the  amortization of the
amount financed under the loan over a series of equal monthly payments,  except,
in the case of a balloon mortgage loan, the final payment.  Each monthly payment
consists of an  installment  of interest which is calculated on the basis of the
outstanding principal balance of the loan multiplied by the stated loan rate and
further multiplied by a fraction, with the numerator equal to the number of days
in the period  elapsed since the preceding  payment of interest was made and the
denominator  equal to the number of days in the annual period for which interest
accrues on the loan. As payments are received under a simple  interest loan, the
amount received is applied first to interest  accrued to the date of payment and
then the  remaining  amount is applied to pay any unpaid fees and then to reduce
the unpaid principal  balance.  Accordingly,  if a borrower pays a fixed monthly
installment on a simple interest loan before its scheduled due date, the portion
of the payment  allocable to interest for the period since the preceding payment
was made  will be less  than it would  have  been had the  payment  been made as
scheduled, and the portion of the payment applied to reduce the unpaid principal
balance will be correspondingly greater. On the other hand, if a borrower pays a
fixed  monthly  installment  after its  scheduled  due date,  the portion of the
payment  allocable to interest for the period  since the  preceding  payment was
made  will be  greater  than it would  have  been had the  payment  been made as
scheduled,  and the remaining portion,  if any, of the payment applied to reduce
the unpaid  principal  balance will be  correspondingly  less. If each scheduled
payment  under a simple  interest  loan is made on or prior to its scheduled due
date,  the  principal  balance  of the loan  will  amortize  more  quickly  than
scheduled.  However, if the borrower consistently makes scheduled payments after
the scheduled due date, the loan will amortize more slowly than scheduled.  If a
simple  interest loan is prepaid,  the borrower is required to pay interest only
to the date of prepayment. The variable allocations among principal and interest
of a simple interest loan may affect the distributions of principal and interest
on the securities, as described in the accompanying prospectus supplement.

     Monthly  payments on most loans are  computed  and applied on an  actuarial
basis.  Monthly  payments  on  actuarial  loans are applied  first to  interest,
generally in an amount equal to,  one-twelfth of the applicable  loan rate times
the unpaid  principal  balance,  with any  remainder  of the payment  applied to
principal.

Underwriting Standards for Mortgage Loans

     The  depositor  expects that the  originator of each of the loans will have
applied,  consistent  with  applicable  federal and state laws and  regulations,
underwriting  procedures intended to evaluate the borrower's credit standing and
repayment  ability  and/or the value and  adequacy  of the  related  property as
collateral.  The depositor  expects that any FHA loan or VA loans will have been
originated  in  compliance  with  the  underwriting  policies  of the FHA or VA,
respectively.  The underwriting criteria applied by the originators of the loans
included  in a pool may  vary  significantly  among  sellers.  The  accompanying
prospectus  supplement will describe most aspects of the underwriting  criteria,
to the extent known by the  depositor,  that were applied by the  originators of
the loans. In

                                       10
<PAGE>

most cases,  the depositor  will have less detailed  information  concerning the
origination  of  seasoned  loans than it will have  concerning  newly-originated
loans.

     The underwriting standards of any particular originator typically include a
set of specific criteria by which the underwriting  evaluation is made. However,
the application of the underwriting  standards does not imply that each specific
criterion was satisfied  individually.  Rather,  a loan will be considered to be
originated in accordance with a given set of underwriting standards if, based on
an overall qualitative  evaluation,  the loan is in substantial  compliance with
the underwriting standards. For example, a loan may be considered to comply with
a set of underwriting standards,  even if one or more specific criteria included
in the underwriting  standards were not satisfied,  if other factors compensated
for the criteria  that were not  satisfied or if the loan is considered to be in
substantial compliance with the underwriting standards.

     Mortgage loans may have been originated  over the internet,  or acquired by
the  depositor or the seller  pursuant to a purchase  that was arranged over the
internet.

     Single and  Multi-Family  Mortgage  Loans.  The  mortgage  credit  approval
process for one- to four-family  residential loans follows a standard  procedure
that generally  complies with FHLMC and FNMA regulations and guidelines,  except
that certain  mortgage loans may have higher loan amount and qualifying  ratios,
and  applicable  federal  and state laws and  regulations.  The credit  approval
process for Cooperative  Loans follows a procedure that generally  complies with
applicable  FNMA  regulations  and  guidelines,  except for the loan amounts and
qualifying ratios,  and applicable  federal and state laws and regulations.  The
originator  of  a  mortgage  loan  generally  will  review  a  detailed   credit
application by the prospective  mortgagor  designed to provide  pertinent credit
information, including a current balance sheet describing assets and liabilities
and a statement of income and expenses, as well as an authorization to apply for
a credit report that summarizes the prospective  mortgagor's credit history with
local  merchants  and  lenders and any record of  bankruptcy.  In  addition,  an
employment  verification is obtained from the prospective  mortgagor's  employer
wherein the employer  reports the length of employment  with that  organization,
the current  salary,  and gives an  indication as to whether it is expected that
the prospective  mortgagor will continue such  employment in the future.  If the
prospective  mortgagor is self-employed,  he or she is required to submit copies
of signed  tax  returns.  The  prospective  mortgagor  may also be  required  to
authorize  verification  of  deposits  at  financial  institutions.  In  certain
circumstances, other credit considerations may cause the originator or depositor
not to require some of the above  documents,  statements or proofs in connection
with the origination or purchase of certain mortgage loans.

     An appraisal  generally will be required to be made on each residence to be
financed.  Such appraisal  generally will be made by an appraiser who meets FNMA
requirements as an appraiser of one- to four-family residential properties.  The
appraiser  is  required to inspect  the  property  and verify that it is in good
condition  and that,  if new,  construction  has been  completed.  The appraisal
generally will be based on the appraiser's judgment of value, giving appropriate
weight to both the market  value of  comparable  homes and the cost of replacing
the  residence.  Alternatively,  as  specified  in the  accompanying  prospectus
supplement, values may be supported by:

o     a statistical valuation;

o     a broker's price opinion; or

o     a drive-by appraisal or other certification of value.

     Based on the data provided,  certain  verifications  and the  appraisal,  a
determination is made by the originator as to whether the prospective  mortgagor
has sufficient  monthly  income  available to meet the  prospective  mortgagor's
monthly  obligations  on the  proposed  loan and other  expenses  related to the
residence, such as property taxes, hazard and primary mortgage insurance and, if
applicable,  maintenance,  and other  financial  obligations  and monthly living
expenses.  Each originator's lending guidelines for conventional  mortgage loans
generally  will specify that mortgage  payments plus taxes and insurance and all
monthly payments extending beyond one year,  including those mentioned above and
other  fixed  obligations,  such as car  payments,  would  equal  no  more  than
specified  percentages  of  the  prospective  mortgagor's  gross  income.  These
guidelines will be applied only to the payments to be made during the first year
of the loan. Other credit  considerations may cause an originator to depart from
these guidelines.  For example, when two individuals co-sign the loan documents,
the incomes and expenses of both individuals may be included in the computation.

                                       11
<PAGE>

     The  mortgaged  properties  may be located in states where,  in general,  a
lender  providing  credit on a single-family  property may not seek a deficiency
judgment  against the  mortgagor but rather must look solely to the property for
repayment  in  the  event  of  foreclosure.   Lenders'  underwriting   standards
applicable to all states,  including  anti-deficiency states,  typically require
that the value of the property  being  financed,  as indicated by the appraisal,
currently  supports and is anticipated to support in the future the  outstanding
loan balance.

     Certain of the types of mortgage loans that may be included in the mortgage
pools may involve  additional  uncertainties not present in traditional types of
loans.  For example,  Buy-Down  Loans and GPM Loans  provide for  escalating  or
variable  payments  by  the  mortgagor.   These  types  of  mortgage  loans  are
underwritten on the basis of a judgment that the mortgagor will have the ability
to make larger  monthly  payments in  subsequent  years.  In some  instances the
mortgagor's  income  may not be  sufficient  to  enable it to  continue  to make
scheduled loan payments as such payments increase.

     To the extent specified in the related prospectus supplement, the depositor
may purchase  mortgage loans for inclusion in a trust fund that are underwritten
under standards and procedures which vary from and are less stringent than those
described in this prospectus.  For instance,  mortgage loans may be underwritten
under a  "limited  documentation"  program if stated in the  related  prospectus
supplement. With respect to these mortgage loans, minimal investigation into the
borrowers' credit history and income profile is undertaken by the originator and
such mortgage loans may be  underwritten  primarily on the basis of an appraisal
of the mortgaged property or Cooperative Dwelling and the loan-to-value ratio at
origination.  Thus,  if the  loan-to-value  ratio  is  less  than  a  percentage
specified  in the  related  prospectus  supplement,  the  originator  may forego
certain aspects of the review relating to monthly income, and traditional ratios
of monthly or total expenses to gross income may not be considered.

     Other  examples of  underwriting  standards that may be less stringent than
traditional  underwriting  standards include investment  properties,  loans with
high loan-to-value  ratios and no primary mortgage insurance,  and loans made to
borrowers with imperfect credit histories.

     The loan-to-value ratio of a mortgage loan will be equal to:

o    the original principal amount of the mortgage loan divided by the lesser of
     the "appraised value" or the sales price for the mortgaged property; or

o    such other ratio as described in the related prospectus supplement.

     The  underwriting  standards  for  mortgage  loans  secured by  multifamily
property will be described in the related prospectus supplement.

     Commercial and Mixed-Use  Mortgage Loans. The  underwriting  procedures and
standards for commercial mortgage loans and Mixed-Use Mortgage Loans included in
a mortgage  pool will be specified in the related  prospectus  supplement to the
extent such procedures and standards are known or available. Such mortgage loans
may be  originated  in  contemplation  of the  transactions  described  in  this
prospectus and the related prospectus  supplement or may have been originated by
third-parties  and acquired by the depositor  directly or through its affiliates
in negotiated transactions.

     The  majority of  originators  of  commercial  mortgage  loans or Mixed-Use
Mortgage Loans will have applied  underwriting  procedures intended to evaluate,
among  other  things,  the  income  derived  from the  mortgaged  property,  the
capabilities   of  the  management  of  the  project,   including  a  review  of
management's  past  performance  record,  its  management  reporting and control
procedures,  to determine its ability to recognize and respond to problems,  and
its accounting  procedures to determine cash management  ability,  the obligor's
credit  standing  and  repayment  ability  and the  value  and  adequacy  of the
mortgaged property as collateral.

     If  stated  in  the  related  prospectus  supplement,  the  adequacy  of  a
commercial  property  or  Mixed-Use  Property  as security  for  repayment  will
generally  have been  determined  by an appraisal  by an  appraiser  selected in
accordance with  preestablished  guidelines  established by or acceptable to the
loan originator for appraisers.  If stated in the related prospectus supplement,
the appraiser must have personally inspected the property and verified that it


                                       12
<PAGE>

was in good condition and that  construction,  if new, has been  completed.  The
appraisal  will have been based upon a cash flow  analysis  and/or a market data
analysis of recent sales of comparable properties and, when deemed applicable, a
replacement  cost  analysis  based  on  the  current  cost  of  constructing  or
purchasing a similar  property,  or such other factors that are described in the
applicable prospectus supplement.

     No  assurance  can be given that  values of any  commercial  properties  or
Mixed-Use  Properties  in a mortgage  pool have remained or will remain at their
levels on the dates of origination of the related mortgage loans. Further, there
is no assurance  that  appreciation  of real estate values  generally will limit
loss  experiences  on  commercial  properties  or Mixed-Use  Properties.  If the
commercial  real estate market should  experience an overall decline in property
values such that the  outstanding  balances  of any  commercial  mortgage  loans
and/or  Mixed-Use  Mortgage  Loans and any  additional  financing on the related
mortgaged  properties  in a particular  mortgage pool become equal to or greater
than the value of the mortgaged  properties,  the actual rates of delinquencies,
foreclosures  and losses on such  mortgage  loans could be higher than those now
generally  experienced in the mortgage lending industry. To the extent that such
losses  are not  covered  by the  methods  of credit  support  or the  insurance
policies  described in this prospectus or by Alternative  Credit  Support,  they
will be borne by holders of the certificates of the series evidencing  interests
in the mortgage pool. Even where credit support covers all losses resulting from
defaults  and  foreclosure,  the effect of defaults and  foreclosures  may be to
increase  prepayment  experience on the related mortgage loans,  thus shortening
weighted average life and affecting yield to maturity.

Qualifications of Unaffiliated Sellers

     Each  seller  unaffiliated  with  the  depositor  must  be  an  institution
experienced  in originating  conventional  mortgage loans and/or FHA Loans or VA
Loans in accordance  with accepted  practices and prudent  guidelines,  and must
maintain  satisfactory  facilities to originate  those loans, or have such other
origination  or  servicing  experience  as  may  be  specified  in  the  related
prospectus supplement.

Representations by Unaffiliated Sellers; Repurchases

     If stated in the  related  prospectus  supplement,  each  seller  that sold
mortgage  loans  directly  or  indirectly  to  the  depositor,  will  have  made
representations  and  warranties  in respect of the mortgage  loans sold by that
seller. These representations and warranties will generally include, among other
things:

o    with respect to each mortgaged  property,  that title insurance,  or in the
     case of  mortgaged  properties  located in areas  where such  policies  are
     generally  not  available,  an  attorney's  certificate  of title,  and any
     required  hazard  and  primary  mortgage  insurance  was  effective  at the
     origination of each mortgage loan, and that each policy,  or certificate of
     title, remained in effect on the date of purchase of the mortgage loan from
     the seller;

o    that the seller had good and marketable title to each mortgage loan sold by
     it;

o    to the best of the seller's knowledge,  the mortgaged property is free from
     damage and in good repair;

o    with respect to each mortgaged property,  that each mortgage  constituted a
     valid first lien, or, if  applicable,  a more junior lien, on the mortgaged
     property, subject only to permissible title insurance exceptions; and

o    that there were no delinquent tax or assessment liens against the mortgaged
     property.

     With respect to a Cooperative  Loan,  the seller will represent and warrant
that:

o    the  security  interest  created  by the  cooperative  security  agreements
     constituted a valid first lien, or, if  applicable,  a more junior lien, on
     the collateral  securing the Cooperative Loan,  subject to the right of the
     related  Cooperative to cancel shares and terminate the  proprietary  lease
     for  unpaid  assessments  and to the lien of the  related  Cooperative  for
     unpaid  assessments  representing  the  mortgagor's  pro rata  share of the
     Cooperative's  payments for its mortgage,  current and future real property
     taxes,  maintenance  charges and other assessments to which like collateral
     is commonly subject; and

                                       13
<PAGE>

o    the  related  cooperative  apartment  was free from  damage and was in good
     repair.

     The  representations  and  warranties  of a seller in respect of a mortgage
loan  generally will have been made as of the date on which that seller sold the
mortgage loan to the depositor or its  affiliate.  A substantial  period of time
may have  elapsed  between  such date and the date of  initial  issuance  of the
series of certificates  evidencing an interest in that mortgage loan.  Since the
representations  and warranties of a seller do not address events that may occur
following the sale of a mortgage loan by that seller, the repurchase  obligation
described  below will not arise if, during the period  commencing on the date of
sale of a mortgage  loan by that  seller to or on behalf of the  depositor,  the
relevant event occurs that would have given rise to a repurchase  obligation had
the event occurred prior to sale of the affected  mortgage  loan.  However,  the
depositor will not include any mortgage loan in the trust fund for any series of
certificates if anything has come to the depositor's  attention that would cause
it to believe that the  representations  and warranties of an seller will not be
accurate  and  complete  in all  material  respects  in respect  of the  related
mortgage  loan  as of the  related  Cut-off  Date.  If  stated  in  the  related
prospectus  supplement,  the  seller  may have  made no, or  extremely  limited,
representations and warranties regarding the mortgage loans.

     In most cases,  the  depositor  will assign its rights with  respect to the
representations and warranties of the seller regarding the mortgage loans to the
trustee for the benefit of the certificateholders.  Alternatively, the depositor
will make similar representations and warranties regarding the mortgage loans to
the trustee for the benefit of the certificateholders. Upon the discovery of the
breach of any  representation  or warranty  made by a seller or the depositor in
respect of a mortgage loan that  materially and adversely  affects the interests
of the  certificateholders  of the related series, that seller or the depositor,
as the case may be, will be  obligated  to  repurchase  the  mortgage  loan at a
purchase price equal to 100% of the unpaid principal balance thereof at the date
of  repurchase  or,  in the case of a series  of  certificates  as to which  the
depositor has elected to treat the related trust fund as a REMIC,  as defined in
the Code, at some other price as may be necessary to avoid a tax on a prohibited
transaction,  as described in Section 860F(a) of the Code, in each case together
with accrued interest on the mortgage loans in the related mortgage pool, to the
first  day  of  the  month  following  the  repurchase  and  the  amount  of any
unreimbursed  Advances made by the servicer or  subservicer,  as applicable,  in
respect of that  mortgage  loan.  The servicer  will be required to enforce this
obligation for the benefit of the trustee and the certificateholders,  following
the  practices it would employ in its good faith  business  judgment were it the
owner of that mortgage  loan.  Subject to the right,  if any, and the ability of
the seller or the  depositor to  substitute  for certain  mortgage  loans,  this
repurchase   obligation   constitutes   the  sole   remedy   available   to  the
certificateholders  of the  related  series  for a breach of  representation  or
warranty by a seller or the depositor.

     If stated in the related prospectus supplement,  if the seller or depositor
discovers or receives notice of any breach of its representations and warranties
relating to a mortgage loan within two years of the date of the initial issuance
of  the  certificates,  or  other  period  as may be  specified  in the  related
prospectus  supplement,  the seller or depositor  may remove that  mortgage loan
from the trust fund, rather than repurchase the mortgage loan as provided above,
and substitute in its place a substitute  mortgage loan. Any substitute mortgage
loan, on the date of substitution, will:

o    have an outstanding  principal  balance,  after  deduction of all scheduled
     payments due in the month of substitution, not in excess of the outstanding
     principal balance of the mortgage loan that it is replacing,  the amount of
     any  shortfall  to be  distributed  to  certificateholders  in the month of
     substitution;

o    have a mortgage rate not less than,  and not more than 1% greater than, the
     mortgage rate of the mortgage loan that it is replacing;

o    have a remaining  term to maturity not greater than,  and not more than one
     year less than, that of the mortgage loan that it is replacing; and

o    comply with all the representations and warranties set forth in the related
     pooling and servicing agreement as of the date of substitution.

This repurchase or substitution obligation constitutes the sole remedy available
to the certificateholders or the trustee for any breach of representation.

                                       14
<PAGE>

     No  assurance  can be given that  sellers  will carry out their  respective
repurchase obligations with respect to mortgage loans. Neither the depositor nor
any other person will be obligated to  repurchase  mortgage  loans if the seller
fails to do so.

Mortgage Certificates

     If stated in the prospectus  supplement with respect to a series, the trust
fund for such series may include  Mortgage  Certificates.  A description  of the
mortgage loans underlying the Mortgage  Certificates and the related pooling and
servicing   arrangements  will  be  set  forth  in  the  applicable   prospectus
supplement.   The  applicable  prospectus   supplement,   will  also  set  forth
information  with respect to the entity or entities forming the related mortgage
pool,   the  issuer  of  any  credit   support  with  respect  to  the  Mortgage
Certificates,  the aggregate  outstanding principal balance and the pass-through
rate  borne  by each  Mortgage  Certificate  included  in the  trust  fund.  The
inclusion of Mortgage  Certificates  in a trust fund with respect to a series of
certificates  is  conditioned  upon  their  characteristics  being  in form  and
substance satisfactory to the related Rating Agency.

The Contract Pools

     General.  If stated in the prospectus  supplement with respect to a series,
the trust fund for that series may include a contract pool evidencing  interests
in  manufactured  housing  conditional  sales  contracts  and  installment  loan
agreements originated by a manufactured housing dealer in the ordinary course of
business and  purchased by the  depositor.  The  contracts  may be  conventional
manufactured  housing  contracts  or  contracts  insured by the FHA or partially
guaranteed by the VA. Each contract will be secured by a manufactured  home. The
contracts may be fully  amortizing or provide for a balloon payment at maturity,
and will bear  interest at a fixed  annual  percentage  rate or a variable  rate
described in the applicable prospectus supplement.

     The manufactured homes securing the contracts consist of manufactured homes
within the meaning of 42 United States Code,  Section  5402(6),  which defines a
"manufactured  home" as "a  structure,  transportable  in one or more  sections,
which in the  traveling  mode, is eight body feet or more in width or forty body
feet or more in length,  or, when erected on site,  is three  hundred  twenty or
more square feet,  and which is built on a permanent  chassis and designed to be
used as a dwelling with or without a permanent  foundation when connected to the
required utilities,  and includes the plumbing,  heating, air conditioning,  and
electrical  systems contained  therein;  except that such term shall include any
structure which meets all the  requirements of [this]  paragraph except the size
requirements  and with  respect to which the  manufacturer  voluntarily  files a
certification  required by the  Secretary of Housing and Urban  Development  and
complies with the standards established under [this] chapter."

     The depositor will cause the contracts  constituting  each contract pool to
be assigned to the trustee named in the related  prospectus  supplement  for the
benefit of the related certificateholders. The servicer specified in the related
prospectus  supplement  will service the contracts,  either by itself or through
other  subservicers,   pursuant  to  a  pooling  and  servicing  agreement.  See
"Description of the  Certificates--Servicing  by  Unaffiliated  Sellers" in this
prospectus.  With respect to those contracts  serviced by the servicer through a
subservicer, the servicer will remain liable for its servicing obligations under
the related  pooling  and  servicing  agreement  as if the  servicer  alone were
servicing the related contracts. If stated in the related prospectus supplement,
the contract documents may be held for the benefit of the trustee by a custodian
appointed pursuant to a custodial agreement among the depositor, the trustee and
the custodian named in the custodial agreement.

     The related prospectus supplement, or, if such information is not available
in advance of the date of the related prospectus  supplement,  will specify, for
the contracts contained in the related contract pool, among other things:

o    the range of dates of origination of the contracts;

o    the weighted average annual percentage rate on the contracts;

o    the range of outstanding principal balances as of the Cut-off Date;

o    the  average  outstanding  principal  balance  of the  contracts  as of the
     Cut-off Date;

o    the weighted average term to maturity as of the Cut-off Date; and

                                       15
<PAGE>

o    the range of original maturities of the contracts.

     The servicer or the seller of the contracts  will  represent and warrant as
to the payment  status of the  contracts  as of the  Cut-off  Date and as to the
accuracy  in all  material  respects  of certain  information  furnished  to the
trustee in respect of each such  contract.  Upon a breach of any  representation
that materially and adversely affects the interest of the  certificateholders in
a contract, the servicer or the seller, as appropriate, will be obligated either
to cure the breach in all  material  respects or to purchase the contract or, if
stated in the related prospectus  supplement,  to substitute another contract as
described below. This repurchase or substitution obligation constitutes the sole
remedy  available  to the  certificateholders  or the  trustee  for a breach  of
representation by the servicer, or seller.

Underwriting Standards for Contracts

     Conventional  contracts will comply with the  underwriting  policies of the
originator or seller as described in the related prospectus supplement.

     With respect to a contract  made in connection  with the related  obligor's
purchase of a manufactured  home, the "appraised value" is the amount determined
by  a  professional  appraiser.   The  appraiser  must  personally  inspect  the
manufactured  home and  prepare a report  which  includes  market  data based on
recent sales of comparable  manufactured  homes and, when deemed  applicable,  a
replacement  cost analysis  based on the current cost of a similar  manufactured
home. The loan-to-value ratio of a contract will be equal to:

o    the original  principal amount of the contract divided by the lesser of the
     "appraised value" or the sales price for the manufactured home; or

o    such other ratio as described in the related prospectus supplement.

Pre-Funding

     If stated in the related prospectus  supplement,  a portion of the issuance
proceeds of the  certificates  of a  particular  series will be  deposited  in a
pre-funding  account to be established  with the trustee,  which will be used to
acquire additional mortgage loans or contracts from time to time during the time
period specified in the related prospectus  supplement.  Prior to the investment
of amounts on deposit in the related  pre-funding account in additional mortgage
loans or  contracts,  those  amounts  may be  invested  in one or more  Eligible
Investments,  or  other  investments  that  may  be  specified  in  the  related
prospectus supplement.

     Additional  mortgage  loans or contracts that are purchased with amounts on
deposit in a pre-funding account will be required to satisfy certain eligibility
criteria  more  fully  set  forth  in the  related  prospectus  supplement.  The
eligibility  criteria  for  additional  mortgage  loans  or  contracts  will  be
consistent  with the  eligibility  criteria of the  mortgage  loans or contracts
included in the related trust fund as of the related closing date subject to the
exceptions that are stated in the related prospectus supplement.

     Although the specific  parameters of a pre-funding  account with respect to
any  issuance  of  certificates  will be  specified  in the  related  prospectus
supplement, it is anticipated that:

o    the period  during which  additional  mortgage  loans or  contracts  may be
     purchased from amounts on deposit in the related  pre-funding  account will
     not exceed 90 days from the related closing date; and

o    the  additional  mortgage  loans or contracts to be acquired by the related
     trust fund will be subject to the same  representations  and  warranties as
     the mortgage  loans or contracts  included in the related trust fund on the
     related closing date,  although additional criteria may also be required to
     be satisfied, as described in the related prospectus supplement.

In no event will the period during which additional  mortgage loans or contracts
may be purchased exceed one year. In no event will the amounts on deposit in any
pre-funding   account  exceed  25%  of  the  initial  principal  amount  of  the
certificates of the related series.

                                       16
<PAGE>

                                  The Depositor

     The  depositor  was  incorporated  in the State of Delaware on December 31,
1985, as a wholly-owned subsidiary of First Boston Securities  Corporation,  the
name of which was subsequently  changed to Credit Suisse First Boston Securities
Corporation,  or FBSC. FBSC is a wholly-owned  subsidiary of Credit Suisse First
Boston,  Inc.  Credit  Suisse  First  Boston  Corporation,  which  may act as an
underwriter in offerings made by this prospectus and an accompanying  prospectus
supplement, as described in "Plan of Distribution" in this prospectus, is also a
wholly-owned  subsidiary  of Credit  Suisse First  Boston,  Inc.  The  principal
executive  offices of the depositor are located at 11 Madison Avenue,  New York,
N.Y. 10010. Its telephone number is (212) 325-2000.

     The  depositor  was  organized,  among other  things,  for the  purposes of
establishing trusts,  selling beneficial interests in those trusts and acquiring
and selling mortgage assets to those trusts.  Neither the depositor,  its parent
nor any of the depositor's affiliates will ensure or guarantee  distributions on
the certificates of any series.

     Trust Assets will be acquired by the depositor directly or through one or
more affiliates.

                                 Use of Proceeds

     The depositor will apply all or substantially  all of the net proceeds from
the sale of each series offered by this prospectus and by the related prospectus
supplement to purchase the Trust Assets,  to repay  indebtedness  which has been
incurred to obtain funds to acquire the Trust  Assets,  to establish the reserve
funds,  if any, for the series and to pay costs of  structuring  and issuing the
certificates.  If stated in the related prospectus supplement,  certificates may
be exchanged by the depositor for Trust Assets. The Trust Assets for each series
of certificates  will be acquired by the depositor either  directly,  or through
one or more  affiliates  which will have  acquired the related Trust Assets from
time to time either in the open market or in privately negotiated transactions.

                              Yield Considerations

     The yield to  maturity  of a security  will depend on the price paid by the
holder of the  security,  the  pass-through  rate on any  security  entitled  to
payments  of  interest,  which  pass-through  rate  may  vary if  stated  in the
accompanying  prospectus  supplement,  and the  rate  and  timing  of  principal
payments on the loans, including prepayments,  liquidations and repurchases, and
the  allocation  of principal  payments to reduce the  principal  balance of the
security or notional amount thereof, if applicable.

     In general,  if a security is  purchased  at a premium over its face amount
and  payments  of  principal  on the  related  loan occur at a rate  faster than
anticipated at the time of purchase,  the  purchaser's  actual yield to maturity
will be lower than that assumed at the time of purchase. On the other hand, if a
class of securities is purchased at a discount from its face amount and payments
of principal on the related loan occur at a rate slower than  anticipated at the
time of purchase,  the  purchaser's  actual yield to maturity will be lower than
assumed.  The effect of principal  prepayments,  liquidations  and  purchases on
yield  will be  particularly  significant  in the case of a class of  securities
entitled to payments of interest only or disproportionate  payments of interest.
In addition,  the total return to investors of securities  evidencing a right to
distributions  of interest at a rate that is based on the  weighted  average net
loan rate of the loans from time to time will be adversely affected by principal
prepayments on loans with loan rates higher than the weighted  average loan rate
on the loans.  In general,  loans with higher loan rates prepay at a faster rate
than loans with lower loan rates. In some  circumstances  rapid  prepayments may
result in the failure of the holders to recoup  their  original  investment.  In
addition,  the  yield to  maturity  on other  types of  classes  of  securities,
including  accrual   securities,   securities  with  a  pass-through  rate  that
fluctuates  inversely  with or at a multiple  of an index or other  classes in a
series  including  more than one class of  securities,  may be  relatively  more
sensitive to the rate of  prepayment  on the related loans than other classes of
securities.

     A class of  securities  may be entitled to payments of interest at a fixed,
variable or adjustable  pass-through  rate, or any  combination of  pass-through
rates, each as specified in the accompanying  prospectus supplement.  A variable
pass-through  rate may be  calculated  based on the weighted  average of the net
loan rates,  net of servicing fees and any excess  spread,  of the related loans
for the month preceding the distribution  date. An adjustable  pass-through rate
may be calculated by reference to an index or otherwise.

                                       17
<PAGE>

     The aggregate payments of interest on a class of securities,  and the yield
to  maturity  on that  security,  will be  affected  by the rate of  payment  of
principal on the securities,  or the rate of reduction in the notional amount of
securities entitled to payments of interest only, and, in the case of securities
evidencing  interests in adjustable  rate mortgage  loans, by changes in the net
loan rates on the adjustable rate mortgage  loans.  See "Maturity and Prepayment
Considerations"  in this  prospectus.  The yield on the securities  will also be
affected by liquidations of loans following  borrower  defaults and by purchases
of loans in the event of breaches of  representations  made for the loans by the
depositor,  the  servicer or the  subservicer  and  others,  or  conversions  of
adjustable rate mortgage loans to a fixed interest rate. See "The Trust Fund" in
this prospectus.

     In general,  defaults on mortgage loans and contracts are expected to occur
with greater  frequency  in their early  years.  The rate of default on cash out
refinance,  limited  documentation  or no  documentation  mortgage loans, and on
loans  with high  loan-to-value  ratios or  combined  loan-to-value  ratios,  as
applicable,  may be higher than for other types of loans.  Likewise, the rate of
default  on loans  that  have  been  originated  under  lower  than  traditional
underwriting  standards may be higher than those  originated  under  traditional
standards.  A trust fund may include  mortgage  loans or contracts  that are one
month or more  delinquent  at the time of  offering  of the  related  series  of
securities or which have recently been several  months  delinquent.  The rate of
default on  delinquent  mortgage  loans or mortgage  loans or  contracts  with a
recent history of delinquency,  including re-performing loans, is more likely to
be higher than the rate of default on loans that have a current payment status.

     The rate of  defaults  and the  severity  of  losses on  mortgage  loans or
contracts  with document  deficiencies  may be higher than for mortgage loans or
contracts with no  documentation  deficiencies.  To the extent that any document
relating to a loan is not in the  possession of the trustee,  the deficiency may
make it  difficult or  impossible  to realize on the  mortgaged  property in the
event of foreclosure, which will affect the timing and the amount of liquidation
proceeds received by the trustee.

     The risk of loss may also be greater on mortgage  loans or  contracts  with
loan-to-value  ratios or combined  loan-to-value  ratios greater than 80% and no
primary insurance policies.  The yield on any class of securities and the timing
of  principal  payments on that class may also be affected by  modifications  or
actions that may be taken or approved by the servicer, the subservicer or any of
their  affiliates  as described in this  prospectus  under  "Description  of the
Certificates--Servicing  of Mortgage Loans and  Contracts," in connection with a
mortgage  loan or  contract  that is in default,  or if a default is  reasonably
foreseeable.

     In addition, the rate and timing of prepayments,  defaults and liquidations
on the  mortgage  loans or  contracts  will be affected by the general  economic
condition  of the region of the  country or the  locality  in which the  related
mortgaged  properties are located. The risk of delinquencies and loss is greater
and prepayments are less likely in regions where a weak or deteriorating economy
exists, as may be evidenced by, among other factors,  increasing unemployment or
falling property values.

     For some loans,  including adjustable rate mortgage loans, the loan rate at
origination  may be below the rate  that  would  result if the index and  margin
relating  to those  loans were  applied  at  origination.  Under the  applicable
underwriting  standards,  the borrower  under each of the loans  usually will be
qualified on the basis of the loan rate in effect at origination  which reflects
a rate significantly  lower than the maximum rate. The repayment of any loan may
thus be dependent on the ability of the borrower to make larger monthly payments
following the adjustment of the loan rate. In addition, the periodic increase in
the amount paid by the  borrower of a Buy-Down  Loan during or at the end of the
applicable  buy-down  period  may  create a  greater  financial  burden  for the
borrower,  who might  not have  otherwise  qualified  for a  mortgage  under the
applicable  underwriting  guidelines,  and may accordingly  increase the risk of
default for the related loan.

     For any loans  secured by junior liens on the related  mortgaged  property,
the inability of the borrower to pay off the balance  thereof may be affected by
the ability of the borrower to obtain  refinancing  of any related  senior loan,
thereby preventing a potential improvement in the borrower's circumstances.

     The holder of a loan  secured  by a junior  lien on the  related  mortgaged
property  will be  subject to a loss of its  mortgage  if the holder of a senior
mortgage is successful in foreclosure  of its mortgage and its claim,  including
any related  foreclosure  costs,  is not paid in full,  since no junior liens or
encumbrances survive such a foreclosure. Also, due to the priority of the senior
mortgage, the holder of a loan secured by a junior lien on the related


                                       18
<PAGE>

mortgaged property may not be able to control the timing, method or procedure of
any foreclosure action relating to the mortgaged  property.  Investors should be
aware  that  any  liquidation,  insurance  or  condemnation  proceeds  receiving
relating to any loans secured by junior liens on the related mortgaged  property
will be available to satisfy the  outstanding  balance of such loans only to the
extent  that the  claims  of the  holders  of the  senior  mortgages  have  been
satisfied in full, including any related foreclosure costs. For loans secured by
junior  liens that have low  balances  relative  to the  amount  secured by more
senior  mortgages,   foreclosure  costs  may  be  substantial  relative  to  the
outstanding  balance  of the loan,  and the amount of any  liquidation  proceeds
available  to  certificateholders   may  be  smaller  as  a  percentage  of  the
outstanding  balance  of the  loan  than  would  be the  case  for a first  lien
residential loan. In addition,  the holder of a loan secured by a junior lien on
the related  mortgaged  property may only foreclose on the property securing the
related  loan  subject to any senior  mortgages,  in which case the holder  must
either  pay  the  entire  amount  due  on the  senior  mortgages  to the  senior
mortgagees at or prior to the  foreclosure  sale or undertake the  obligation to
make payments on the senior mortgages.

     Similarly, a borrower of a Balloon Loan will be required to pay the Balloon
Amount  at   maturity.   Those  loans  pose  a  greater  risk  of  default  than
fully-amortizing   loans,   because  the  borrower's  ability  to  make  such  a
substantial  payment at  maturity  will in most cases  depend on the  borrower's
ability to obtain  refinancing  or to sell the mortgaged  property  prior to the
maturity of the loan. The ability to obtain  refinancing will depend on a number
of factors  prevailing at the time  refinancing or sale is required,  including,
without  limitation,   the  borrower's  personal  economic  circumstances,   the
borrower's  equity  in the  related  mortgaged  property,  real  estate  values,
prevailing  market interest rates,  tax laws and national and regional  economic
conditions.  None of the the depositor,  any seller,  or any of their affiliates
will be obligated to refinance or  repurchase  any loan or to sell any mortgaged
property,  unless that  obligation is specified in the  accompanying  prospectus
supplement.

     The loans  rates on  adjustable  rate  mortgage  loans that are  subject to
negative amortization  typically adjust monthly and their amortization schedules
adjust less frequently.  Because initial loan rates are typically lower than the
sum of the indices  applicable at origination and the related margins,  during a
period of rising interest rates as well as immediately  after  origination,  the
amount of interest  accruing on the principal  balance of those loans may exceed
the  amount of the  scheduled  monthly  payment.  As a result,  a portion of the
accrued  interest on negatively  amortizing  loans may become deferred  interest
which will be added to their  principal  balance  and will bear  interest at the
applicable loan rate.

     If stated in the accompanying  prospectus  supplement,  a trust may contain
GPM Loans or Buy-down Loans that have monthly  payments that increase during the
first few years following origination. Borrowers in most cases will be qualified
for those loans on the basis of the initial monthly payment.  To the extent that
the related  borrower's income does not increase at the same rate as the monthly
payment,  such a loan may be more  likely to default  than a mortgage  loan with
level monthly payments.

     Manufactured  homes,  unlike  residential real estate  properties,  in most
cases  depreciate in value.  Consequently,  at any time after  origination it is
possible,  especially in the case of contracts with high loan-to-value ratios at
origination,  that the market value of a manufactured home may be lower than the
principal amount outstanding under the related contract.

     If credit enhancement for a series of securities is provided by a letter of
credit,  insurance policy or bond that is issued or guaranteed by an entity that
suffers financial difficulty,  that credit enhancement may not provide the level
of  support  that  was  anticipated  at  the  time  an  investor  purchased  its
certificate.  In the event of a default  under the terms of a letter of  credit,
insurance  policy or bond,  any Realized  Losses on the loans not covered by the
credit  enhancement  will be  applied  to a series of  securities  in the manner
described in the accompanying prospectus supplement and may reduce an investor's
anticipated yield to maturity.

     The  accompanying   prospectus  supplement  may  set  forth  other  factors
concerning  the loans  securing a series of  securities or the structure of that
series that will affect the yield on the securities.

     No assurance can be given that the value of the mortgaged property securing
a loan  has  remained  or will  remain  at the  level  existing  on the  date of
origination.  If the residential real estate market should experience an overall
decline in property values such that the  outstanding  balances of the loans and
any secondary financing on the mortgaged  properties in a particular pool become
equal to or greater than the value of the mortgaged properties, the

                                       19
<PAGE>

actual  rates of  delinquencies,  foreclosures  and losses  could be higher than
those now generally experienced in the mortgage lending industry.

     Generally,  when a full  prepayment is made on a mortgage loan or contract,
the  mortgagor  under the  mortgage  loan or the obligor  under a  contract,  is
charged  interest for the number of days  actually  elapsed from the due date of
the  preceding  monthly  payment up to the date of such  prepayment,  at a daily
interest rate  determined by dividing the mortgage rate or contract rate by 365.
Full  prepayments  will  reduce  the  amount  of  interest  paid by the  related
mortgagor or obligor  because  interest on the principal  amount of any mortgage
loan or contract so prepaid will be paid only to the date of prepayment  instead
of for a full  month;  however,  unless  otherwise  provided  in the  applicable
prospectus supplement, the servicer with respect to a series will be required to
pay from its own funds the portion of any interest at the related  mortgage rate
or  contract  rate,  in each case less the  servicing  fee rate,  that is not so
received.  Partial  prepayments  generally  are  applied on the first day of the
month following receipt, with no resulting reduction in interest payable for the
period in which the partial prepayment is made.  Accordingly,  to the extent not
covered by the  servicer,  prepayments  will reduce the yield to maturity of the
certificates. See "Maturity and Prepayment Considerations" in this prospectus.

                     Maturity and Prepayment Considerations

     As indicated in this prospectus  under "The Trust Fund," the original terms
to  maturity of the loans in a given  trust will vary  depending  on the type of
loans  included  in that  trust.  The  prospectus  supplement  for a  series  of
securities  will contain  information  regarding the types and maturities of the
loans in the related trust.  The prepayment  experience,  the timing and rate of
repurchases and the timing and amount of liquidations for the related loans will
affect  the  weighted  average  life  of and  yield  on the  related  series  of
securities.

     Prepayments  on  loans  are  commonly  measured  relative  to a  prepayment
standard or model.  The prospectus  supplement for each series of securities may
describe  one or more  prepayment  standards  or models and may  contain  tables
setting  forth the  projected  yields to maturity on each class of securities or
the weighted  average life of each class of securities and the percentage of the
original  principal amount of each class of securities of that series that would
be outstanding on the specified  distribution  dates for the series based on the
assumptions  stated  in  the  accompanying   prospectus  supplement,   including
assumptions  that  prepayments on the loans are made at rates  corresponding  to
various  percentages of the prepayment  standard or model. There is no assurance
that  prepayment of the loans  underlying a series of securities will conform to
any level of the  prepayment  standard or model  specified  in the  accompanying
prospectus supplement.

     The following is a list of factors that may affect prepayment experience:

o    homeowner mobility;

o    economic conditions;

o    changes in borrowers' housing needs;

o    job transfers;

o    unemployment;

o    borrowers' equity in the properties securing the mortgages;

o    servicing decisions;

o    enforceability of due-on-sale clauses;

o    mortgage market interest rates;

o    mortgage recording taxes;

o    solicitations and the availability of mortgage funds; and

o    the obtaining of secondary financing by the borrower.

                                       20
<PAGE>

     All  statistics  known  to  the  depositor  that  have  been  compiled  for
prepayment  experience  on loans  indicate  that  while  some  loans may  remain
outstanding  until their stated  maturities,  a substantial  number will be paid
significantly  earlier  than their  respective  stated  maturities.  The rate of
prepayment for  conventional  fixed-rate  loans has fluctuated  significantly in
recent  years.  In  general,   however,   if  prevailing   interest  rates  fall
significantly  below  the  loan  rates  on the  loans  underlying  a  series  of
securities,  the  prepayment  rate of those loans is likely to be  significantly
higher  than if  prevailing  rates  remain at or above the rates  borne by those
loans. Conversely,  when prevailing interest rates increase,  borrowers are less
likely to prepay their loans.

     Some mortgage loans may only be prepaid by the borrowers  during  specified
periods upon the payment of a prepayment fee or penalty.  The requirement to pay
a prepayment fee or penalty may discourage  some borrowers from prepaying  their
mortgage loans or contracts. The servicer or subservicer will be entitled to all
prepayment  charges  and late  payment  charges  received on the loans and those
amounts  will not be  available  for  payment on the  securities,  except to the
extent specified in the related  prospectus  supplement.  However,  some states'
laws restrict the imposition of prepayment  charges even when the mortgage loans
or contracts expressly provide for the collection of those charges. As a result,
it is possible  that  prepayment  charges may not be collected  even on mortgage
loans or contracts that provide for the payment of these charges.

     The  addition  of any  deferred  interest to the  principal  balance of any
related  class of  securities  will  lengthen the weighted  average life of that
class  of  securities  and may  adversely  affect  yield  to  holders  of  those
securities.

     Mortgage loans and contracts with fixed interest rates,  except in the case
of FHA and VA  Loans,  generally  contain  due-on-sale  clauses  permitting  the
mortgagee or obligee to accelerate the maturity  thereof upon  conveyance of the
mortgaged property.  In most cases, the servicer may permit proposed assumptions
of mortgage loans and contracts where the proposed buyer meets the  underwriting
standards  applicable to that mortgage loan or contract.  This assumption  would
have the effect of extending  the average life of the mortgage loan or contract.
FHA Loans and VA Loans are not permitted to contain "due on sale"  clauses,  and
are freely assumable.

     An adjustable rate mortgage loan is assumable,  in some  circumstances,  if
the  proposed  transferee  of the related  mortgaged  property  establishes  its
ability to repay the loan and, in the reasonable  judgment of the servicer,  the
security  for the  adjustable  rate  mortgage  loan would not be impaired by the
assumption.  The extent to which  adjustable  rate mortgage loans are assumed by
purchasers  of the  mortgaged  properties  rather  than  prepaid by the  related
borrowers in connection  with the sales of the mortgaged  properties will affect
the weighted average life of the related series of securities.  See "Description
of the  Certificates--Servicing of Mortgage Loans and Contracts," "--Enforcement
of  "Due-on-Sale"  Clauses;  Realization  Upon  Defaulted  Mortgage  Loans," and
"Certain  Legal Aspects of the Mortgage Loans and  Contracts--Enforceability  of
Certain  Provisions" for a description of provisions of each agreement and legal
developments that may affect the prepayment rate of loans.

     The terms of the  pooling  and  servicing  agreement  related to a specific
series  generally will require the related  subservicer,  special  servicer,  if
applicable,  or servicer to enforce any due-on-sale  clause to the extent it has
knowledge  of  the  conveyance  or the  proposed  conveyance  of the  underlying
mortgaged  property  or  Cooperative  Dwelling;   provided,  however,  that  any
enforcement  action that would impair or threaten to impair any  recovery  under
any related insurance policy will not be required or permitted. See "Description
of the  Certificates--Enforcement  of  "Due-On-Sale"  Clauses;  Realization Upon
Defaulted  Mortgage  Loans" and "Certain Legal Aspects of the Mortgage Loans and
Contracts--The  Mortgage Loans" for a description of certain  provisions of each
pooling and servicing  agreement and certain legal  developments that may affect
the prepayment experience on the related mortgage loans.

     At  the  request  of  the  related  mortgagors,  the  related  servicer  or
subservicer,  as  applicable,  may refinance the mortgage  loans in any mortgage
pool by  accepting  prepayments  on those  mortgage  loans and  making new loans
secured by a mortgage on the same property. Upon any refinancing,  the new loans
will not be included in the related  mortgage  pool and the related  servicer or
subservicer, as applicable, will be required to repurchase the affected mortgage
loan.  A mortgagor  may be legally  entitled to require the related  servicer or
subservicer,  as  applicable,  to  allow  a  refinancing.  Any  repurchase  of a
refinanced  mortgage  loan will have the same effect as a prepayment  in full of
the related mortgage loan.


                                       21
<PAGE>

     For any index used in  determining  the rate of interest  applicable to any
series  of  securities  or  loan  rates  of the  underlying  mortgage  loans  or
contracts,  there are a number of factors  that affect the  performance  of that
index and may cause that index to move in a manner different from other indices.
If an index  applicable to a series  responds to changes in the general level of
interest rates less quickly than other indices,  in a period of rising  interest
rates, increases in the yield to certificateholders due to those rising interest
rates may occur later than that which would be produced by other indices, and in
a period of  declining  rates,  that index may remain  higher than other  market
interest  rates which may result in a higher level of  prepayments of the loans,
which adjust in accordance with that index,  than of mortgage loans or contracts
which adjust in accordance with other indices.

     Mortgage  loans made with  respect to  commercial  properties,  multifamily
properties and Mixed-Use Properties may have provisions that prohibit prepayment
entirely  or for  certain  periods  and/or  require  payment of premium or yield
maintenance  penalties,  and may provide for payments of interest  only during a
certain period  followed by amortization of principal on the basis of a schedule
extending beyond the maturity of the related mortgage loan.  Prepayments of such
mortgage loans may be affected by these and other factors,  including changes in
interest  rates and the  relative  tax  benefits  associated  with  ownership of
commercial property, multifamily property and Mixed-Use Property.

     If stated in the prospectus  supplement  relating to a specific series, the
depositor  or other  specified  entity  will have the option to  repurchase  the
assets  included in the related  trust fund under the  conditions  stated in the
related  prospectus  supplement.  For any  series  of  securities  for which the
depositor  has  elected  to  treat  the  trust  fund as a  REMIC,  any  optional
repurchase of assets will be effected in  compliance  with the  requirements  of
Section  860F(a)(4) of the Code so as to  constitute a "qualifying  liquidation"
thereunder.  In  addition,  the  depositor  will  be  obligated,  under  certain
circumstances,  to  repurchase  certain  assets of the related  trust fund.  The
sellers will also have certain repurchase  obligations,  as more fully described
in  this  prospectus.  In  addition,  the  mortgage  loans  underlying  Mortgage
Certificates may be subject to repurchase under  circumstances  similar to those
described  above.   Repurchases  of  the  mortgage  loans  underlying   Mortgage
Certificates  will have the same effect as  prepayments  in full. See "The Trust
Fund--Mortgage   Loan    Program--Representations   by   Unaffiliated   Sellers;
Repurchases," "Description of the  Certificates--Assignment  of Mortgage Loans,"
"--Assignment  of  Mortgage  Certificates,"   "--Assignment  of  Contracts"  and
"--Termination."

                         Description of the Certificates

     Each  series  of  securities  will  be  issued  pursuant  to  an  agreement
consisting of either:

o    a pooling and servicing agreement; or

o    a trust agreement.

A pooling and servicing agreement will be an agreement among the depositor,  the
servicer, if any, and the trustee named in the applicable prospectus supplement.
A trust  agreement  will be an agreement  between the depositor and the trustee.
Forms of the pooling and servicing  agreement and the trust  agreement have been
filed as exhibits to the  Registration  Statement of which this  prospectus is a
part. The following  summaries describe all material terms of the securities and
the pooling and servicing  agreements or trust  agreement that are not described
in the  related  prospectus  supplement.  The  summaries  do not  purport  to be
complete and are subject to, and are  qualified  in their  entirety by reference
to, all of the  provisions  of the  pooling  and  servicing  agreement  or trust
agreement for the applicable series and the related prospectus supplement.

General

     The trust fund with respect to a series will consist of:

o    the mortgage loans, contracts,  and Mortgage Certificates and distributions
     thereon as from time to time are subject to the applicable  related pooling
     and servicing agreement;

o    the assets as from time to time  identified  as  deposited  in the  related
     Certificate Account;

o    the related  property  acquired by foreclosure of mortgage loans or deed in
     lieu of foreclosure, or manufactured homes acquired by repossession;

                                       22
<PAGE>


o    the surety  bond or  financial  guaranty  insurance  policy,  if any,  with
     respect to that series;

o    the letter of credit, if any, with respect to that series;

o    the pool insurance policy,  if any, with respect to that series,  described
     below under "Description of Insurance",

o    the special hazard insurance  policy,  if any, with respect to that series,
     described below under "Description of Insurance";

o    the mortgagor bankruptcy bond and proceeds thereof, if any, with respect to
     that series, as described below under "Description of Insurance";

o    the  performance  bond and proceeds  thereof,  if any, with respect to that
     series;

o    the primary  mortgage  insurance  policies,  if any,  with  respect to that
     series, as described below under "Description of Insurance"; and

o    the GPM Funds and Buy-Down Funds, if any, with respect to that series;  or,
     in lieu of some or all of the foregoing,  the Alternative Credit Support as
     shall be described in the applicable prospectus supplement.

     Upon  the  original  issuance  of  a  series  of  securities,  certificates
representing the minimum undivided interest or beneficial  ownership interest in
the related trust fund or the minimum  notional  amount  allocable to each class
will  evidence  the  undivided  interest,   beneficial   ownership  interest  or
percentage ownership interest specified in the related prospectus supplement.

     If stated in the related prospectus supplement, one or more subservicers or
the depositor may directly  perform some or all of the duties of a servicer with
respect to a series.

     If stated in the prospectus supplement for a series, ownership of the trust
fund for that series may be evidenced  by one or more  classes of  certificates.
Distributions  of principal  and interest  with respect to those  classes may be
made on a sequential or concurrent basis, as specified in the related prospectus
supplement.

     The Residual Certificates,  if any, included in a series will be designated
by the depositor as the "residual interest" in the related REMIC for purposes of
Section  860G(a)(2)  of the  Code,  and will  represent  the  right  to  receive
distributions as specified in the prospectus  supplement for the related series.
All other classes of securities of the related series will  constitute  "regular
interests"  in the  related  REMIC,  as  defined  in the Code.  If stated in the
related prospectus  supplement,  the Residual Certificates may be offered hereby
and by means of the  related  prospectus  supplement.  See  "Federal  Income Tax
Consequences" in this prospectus.

     If stated in the  prospectus  supplement  for a series,  each  asset in the
related  trust fund will be assigned an initial  asset  value.  If stated in the
related  prospectus  supplement,  the asset  value of each asset in the  related
trust fund will be the Certificate Principal Balance of each class or classes of
certificates  of that  series  that,  based  upon  certain  assumptions,  can be
supported  by  distributions  on the Trust  Assets  allocable  to that  class or
subclass,  together with reinvestment income thereon, to the extent specified in
the related prospectus supplement.  The method of determining the asset value of
the  assets in the trust  fund for a series  will be  specified  in the  related
prospectus supplement.

     If stated in the prospectus supplement with respect to a series,  ownership
of the trust fund for that  series may be  evidenced  by one or more  classes or
subclasses of securities  that are senior  securities and one or more classes or
subclasses of securities that are subordinated securities, each representing the
undivided  interests  in the trust  fund  specified  in the  related  prospectus
supplement. If stated in the related prospectus supplement,  one or more classes
or subclasses of subordinated  securities of a series may be subordinated to the
right of the holders of securities of one or more other classes or subclasses of
subordinated securities within that series to receive distributions with respect
to the mortgage  loans or contracts in the related trust fund, in the manner and
to the extent specified in the related prospectus  supplement.  If stated in the
related prospectus  supplement,  the holders of the senior  certificates of that
series  may have the  right to  receive a greater  than pro rata  percentage  of
prepayments of


                                       23
<PAGE>

principal on the related mortgage loans,  contracts or mortgage loans underlying
the  related  Mortgage  Certificates  in the manner and under the  circumstances
described in the related prospectus supplement.

     If stated in the related  prospectus  supplement,  the  depositor  may sell
certain classes or subclasses of the certificates of a series,  including one or
more  classes  or   subclasses   of   subordinated   certificates   or  Residual
Certificates,  in privately  negotiated  transactions  exempt from  registration
under the Securities Act of 1933, as amended.  Certificates sold in one of these
privately  negotiated exempt  transactions will be transferable only pursuant to
an  effective  registration  statement  or an  applicable  exemption  under  the
Securities Act of 1933, as amended,  and pursuant to any  applicable  state law.
Alternatively, if stated in the related prospectus supplement, the depositor may
offer one or more classes or  subclasses  of the  subordinated  certificates  or
Residual  Certificates  of a series by means of this  prospectus and the related
prospectus supplement.  The certificates of a series offered hereby and by means
of the related  prospectus  supplements will be transferable and exchangeable at
the office or agency maintained by the trustee for the purposes set forth in the
related prospectus  supplement.  No service charge will be made for any transfer
or exchange  of  certificates,  but the  trustee  may  require  payment of a sum
sufficient to cover any tax or other governmental  charge in connection with any
transfer or exchange.

Form of Certificates

     As specified in the  applicable  prospectus  supplement,  the securities of
each series will be issued either as physical  securities or in book-entry form.
If issued as physical  securities,  the securities  will be in fully  registered
form  only  in  the  denominations  specified  in  the  accompanying  prospectus
supplement,  and will be  transferable  and  exchangeable at the corporate trust
office of the  certificate  registrar  appointed  under the related  pooling and
servicing agreement or trust agreement to register the certificates.  No service
charge will be made for any  registration of exchange or transfer of securities,
but the  trustee  may require  payment of a sum  sufficient  to cover any tax or
other governmental  charge. The term  certificateholder  or holder refers to the
entity whose name  appears on the records of the  certificate  registrar  or, if
applicable,  a transfer  agent,  as the  registered  holder of the  certificate,
except as otherwise indicated in the accompanying prospectus supplement.

     If issued in book-entry form, the classes of a series of securities will be
initially  issued  through the  book-entry  facilities of The  Depository  Trust
Company,  or DTC, or Clearstream  Banking,  societe  anonyme,  formerly known as
Cedelbank,  SA, or Clearstream,  or the Euroclear System in Europe,  if they are
participants of those systems,  or indirectly  through  organizations  which are
participants  in those systems,  or through any other  depository or facility as
may be specified in the accompanying  prospectus supplement.  As to any class of
book-entry  securities so issued,  the record holder of those securities will be
DTC's nominee.  Clearstream and Euroclear System will hold omnibus  positions on
behalf  of  their  participants   through  customers'   securities  accounts  in
Clearstream's  and  Euroclear  System's  names on the books of their  respective
depositaries,  which in turn will hold those positions in customers'  securities
accounts  in  the   depositaries'   names  on  the  books  of  DTC.   DTC  is  a
limited-purpose trust company organized under the laws of the State of New York,
which  holds  securities  for its DTC  participants,  which  include  securities
brokers and dealers,  banks,  trust  companies  and clearing  corporations.  DTC
together with the Clearstream and Euroclear System  participating  organizations
facilitates  the clearance and  settlement  of securities  transactions  between
participants   through   electronic   book-entry  changes  in  the  accounts  of
participants.   Other  institutions  that  are  not  participants  but  indirect
participants  which  clear  through or maintain a  custodial  relationship  with
participants have indirect access to DTC's clearance system.

     Unless otherwise specified in the accompanying  prospectus  supplement,  no
beneficial  owner in an interest in any book-entry  certificate will be entitled
to receive a certificate representing that interest in registered,  certificated
form, unless either (i) DTC ceases to act as depository for that certificate and
a successor depository is not obtained, or (ii) the depositor elects in its sole
discretion to discontinue the registration of the securities  through DTC. Prior
to any such event,  beneficial owners will not be recognized by the trustee, the
servicer or the subservicer as holders of the related securities for purposes of
the related  agreement,  and  beneficial  owners will be able to exercise  their
rights as owners of their securities only indirectly  through DTC,  participants
and indirect participants.  Any beneficial owner that desires to purchase,  sell
or  otherwise  transfer  any interest in  book-entry  securities  may do so only
through  DTC,  either  directly  if the  beneficial  owner is a  participant  or
indirectly through participants and, if applicable, indirect participants. Under
the procedures of DTC,  transfers of the beneficial  ownership of any book-entry
securities will be required to be made in minimum denominations specified in the
accompanying prospectus supplement.  The ability of a beneficial owner to pledge
book-entry securities to persons or entities that are not


                                       24
<PAGE>

participants  in the  DTC  system,  or to  otherwise  act  with  respect  to the
securities,  may  be  limited  because  of the  lack  of  physical  certificates
evidencing   the   securities  and  because  DTC  may  act  only  on  behalf  of
participants.

     Because of time zone differences,  the securities  account of a Clearstream
or  Euroclear  System  participant  as a  result  of a  transaction  with  a DTC
participant,  other  than a  depositary  holding  on  behalf of  Clearstream  or
Euroclear  System,  will be credited during a subsequent  securities  settlement
processing  day,  which  must be a business  day for  Clearstream  or  Euroclear
System,  as the case may be,  immediately  following  the DTC  settlement  date.
Credits or any transactions in those  securities  settled during this processing
will be reported to the relevant  Euroclear  System  participant  or Clearstream
participants  on that business day.  Cash received in  Clearstream  or Euroclear
System  as a  result  of  sales  of  securities  by  or  through  a  Clearstream
participant or Euroclear System participant to a DTC participant, other than the
depositary for Clearstream or Euroclear  System,  will be received with value on
the DTC settlement  date,  but will be available in the relevant  Clearstream or
Euroclear  System cash account only as of the business day following  settlement
in DTC.

     Transfers  between  participants  will occur in accordance  with DTC rules.
Transfers  between  Clearstream  participants and Euroclear System  participants
will occur in accordance with their respective rules and operating procedures.

     Cross-market  transfers  between  persons  holding  directly or  indirectly
through DTC, on the one hand,  and directly or  indirectly  through  Clearstream
participants or Euroclear System participants, on the other, will be effected in
DTC  in  accordance   with  DTC  rules  on  behalf  of  the  relevant   European
international clearing system by the relevant  depositaries;  however, the cross
market  transactions  will  require  delivery of  instructions  to the  relevant
European  international  clearing  system by the  counterparty in that system in
accordance  with its rules and procedures and within its  established  deadlines
defined  with respect to European  time.  The  relevant  European  international
clearing  system will, if the  transaction  meets its  settlement  requirements,
deliver instructions to its depositary to take action to effect final settlement
on its  behalf by  delivering  or  receiving  securities  in DTC,  and making or
receiving  payment  in  accordance  with  normal  procedures  for same day funds
settlement  applicable to DTC.  Clearstream  participants  and Euroclear  System
participants may not deliver instructions directly to the depositaries.

     Clearstream,  as  a  professional  depository,  holds  securities  for  its
participating  organizations  and  facilitates  the clearance and  settlement of
securities  transactions  between  Clearstream  participants  through electronic
book-entry changes in accounts of Clearstream participants,  thereby eliminating
the need for physical  movement of  securities.  As a  professional  depository,
Clearstream is subject to regulation by the Luxembourg Monetary Institute.

     Euroclear  System  was  created  to hold  securities  for  participants  of
Euroclear System and to clear and settle  transactions  between Euroclear System
participants  through  simultaneous   electronic   book-entry  delivery  against
payment,  thereby  eliminating the need for physical  movement of securities and
any risk from lack of simultaneous  transfers of securities and cash.  Euroclear
System operator is the Brussels, Belgium office of Morgan Guaranty Trust Company
of New York,  under contract with the clearance  cooperative,  Euroclear  System
Clearance Systems S.C., a Belgian co-operative  corporation.  All operations are
conducted by the Euroclear System operator,  and all Euroclear System securities
clearance  accounts and  Euroclear  System cash  accounts are accounts  with the
Euroclear System operator, not the clearance cooperative.

     The clearance cooperative establishes policy for Euroclear System on behalf
of Euroclear System  participants.  The Euroclear System operator is the Belgian
branch of a New York banking  corporation  which is a member bank of the Federal
Reserve  System.  As a result,  it is  regulated  and  examined  by the Board of
Governors  of the  Federal  Reserve  System  and  the  New  York  State  Banking
Department,  as well as the Belgian  Banking  Commission.  Securities  clearance
accounts and cash accounts with the  Euroclear  System  operator are governed by
the terms and  conditions  Governing  Use of  Euroclear  System and the  related
operating  procedures of the Euroclear  System and  applicable  Belgian law. The
terms and conditions  govern  transfers of securities and cash within  Euroclear
System,  withdrawals of securities and cash from Euroclear System,  and receipts
of payments for  securities  in Euroclear  System.  All  securities in Euroclear
System are held on a fungible basis without  attribution of specific  securities
to specific securities clearance accounts.

                                       25
<PAGE>

     Distributions on the book-entry securities will be forwarded by the trustee
to  DTC,  and  DTC  will  be  responsible  for  forwarding   those  payments  to
participants,  each of which will be responsible  for disbursing the payments to
the beneficial owners it represents or, if applicable, to indirect participants.
Accordingly,  beneficial owners may experience delays in the receipt of payments
relating to their  securities.  Under DTC's  procedures,  DTC will take  actions
permitted to be taken by holders of any class of book-entry securities under the
related  agreement  only at the direction of one or more  participants  to whose
account the  book-entry  securities  are credited and whose  aggregate  holdings
represent  no less than any minimum  amount of  percentage  interests  or voting
rights required  therefor.  DTC may take  conflicting  actions for any action of
certificateholders of any class to the extent that participants  authorize those
actions. None of the servicer,  the subservicer,  the depositor,  the trustee or
any of their respective affiliates will have any liability for any aspect of the
records  relating  to or  payments  made  on  account  of  beneficial  ownership
interests in the  book-entry  securities,  or for  maintaining,  supervising  or
reviewing any records relating to those beneficial ownership interests.

Distributions of Principal and Interest

     Beginning  on the date  specified  in the  related  prospectus  supplement,
distributions  of principal and interest on the certificates of a series will be
made by the servicer or trustee, if stated in the related prospectus supplement,
on each  distribution  date to  persons  in  whose  name  the  certificates  are
registered  at the  close  of  business  on the  day  specified  in the  related
prospectus  supplement.  Distributions  of interest  will be  calculated  in the
manner and at the per annum rate specified in the related prospectus supplement,
which  rate may be fixed  or  variable.  Interest  on the  certificates  will be
calculated on the basis of a 360-day year consisting of twelve 30-day months, or
such  other  method  as  specified   in  the  related   prospectus   supplement.
Distributions of principal on the certificates  will be made in the priority and
manner and in the amounts specified in the related prospectus supplement.

     On each distribution  date, the trustee will distribute to each holder of a
certificate for each class or subclass an amount equal to:

o    the product of the Percentage  Interest  evidenced by that  certificate and
     the  interest of the  related  class or  subclass  in the  distribution  of
     principal and the distribution of interest; or

o    some other amount as described in the related prospectus supplement.

A  certificate  of a class  or  subclass  may  represent  a right to  receive  a
percentage  of both  the  distribution  of  principal  and the  distribution  of
interest  or a  percentage  of  either  the  distribution  of  principal  or the
distribution of interest, as specified in the related prospectus supplement.  If
stated in the related prospectus supplement, a class or subclass of certificates
may be entitled to interest only or principal only.

     If stated in the related prospectus  supplement,  the holders of the senior
certificates  may have the  right to  receive a  percentage  of  prepayments  of
principal on the related  mortgage  loans or contracts  that is greater than the
percentage of regularly  scheduled  payment of principal that holder is entitled
to receive.  These percentages may vary from time to time,  subject to the terms
and conditions specified in the prospectus supplement.

     Distributions of interest on certain classes or subclasses of certificates,
known as Compound Interest Certificates,  will be made only after the occurrence
of certain events specified in the related prospectus  supplement.  Prior to the
time  distributions  of  interest  are made on those  certificates,  accrued and
unpaid  interest,   or  Accrual  Distribution  Amount,  will  be  added  to  the
Certificate  Principal  Balance of those  certificates on each distribution date
and will accrue  interest  until paid as  described  in the  related  prospectus
supplement.  If  stated  in  the  related  prospectus  supplement,  the  Accrual
Distribution  Amount  will be payable  as  principal  to one or more  classes or
subclasses of certificates.

     Distributions  in  reduction  of  the  Certificate   Principal  Balance  of
certificates of a series will be made on each  distribution date for the related
series to the holders of the certificates of the class or subclass then entitled
to  receive  distributions  until the  aggregate  amount of  distributions  have
reduced  the  Certificate   Principal  Balance  of  the  certificates  to  zero.
Allocation of distributions in reduction of Certificate  Principal  Balance will
be made to each  class or  subclass  of  certificates  in the order and  amounts
specified in the related prospectus supplement,  which, if stated in the related
prospectus supplement, may be concurrently.

                                       26
<PAGE>

     The Certificate  Principal Balance of a certificate of a series at any time
represents the maximum  specified  dollar  amount,  exclusive of interest at the
related  Pass-Through  Rate,  to which the holder  thereof is entitled  from the
assets in the trust fund for the related series,  and will decline to the extent
distributions in reduction of Certificate Principal Balance are received by, and
losses  on  the   mortgage   loans  or   contracts   are   allocated   to,   the
certificateholder.  The initial  Certificate  Principal Balance of each class or
subclass within a series that has been assigned a Certificate  Principal Balance
will be specified in the related prospectus supplement.

     Distributions,  other  than the final  distribution  in  retirement  of the
certificates, will be made by check mailed to the address of the person entitled
thereto as it appears on the certificate register for the related series, except
that,  with  respect to any holder of a  certificate  meeting  the  requirements
specified in the applicable prospectus  supplement,  distributions shall be made
by wire transfer in immediately available funds, provided that the trustee shall
have been  furnished  with  appropriate  wiring  instructions  not less than two
business days prior to the related  distribution date. The final distribution in
retirement of certificates  will be made only upon presentation and surrender of
the  certificates  at the  office or agency  designated  by the  trustee  or the
servicer for that  purpose,  as specified  in the final  distribution  notice to
certificateholders.

Assignment of Mortgage Loans

     The depositor will cause the mortgage loans constituting a mortgage pool to
be assigned to the trustee, together with all principal and interest received on
or with  respect  to those  mortgage  loans  after  the  Cut-off  Date,  but not
including  principal and interest due on or before the Cut-off Date. The trustee
will,   concurrently  with  the  assignment  of  mortgage  loans,   deliver  the
certificates to the depositor in exchange for the mortgage loans.  Each mortgage
loan will be  identified  in a schedule  appearing  as an exhibit to the related
pooling and servicing agreement. The schedule will include information as to the
adjusted principal balance of each mortgage loan as of the Cut-off Date, as well
as information respecting the mortgage rate, the currently scheduled monthly, or
other  periodic,  payment of principal  and  interest,  the maturity date of the
Mortgage Note and the loan-to-value ratio of the mortgage loan at origination.

     If stated in the accompanying prospectus supplement, and in accordance with
the  rules  of  membership  of  MERSCORP,   Inc.  and/or   Mortgage   Electronic
Registration Systems,  Inc. or, MERS(R),  assignments of mortgages for any trust
asset in the related trust will be registered  electronically  through  Mortgage
Electronic  Registration  Systems,  Inc.,  or MERS(R)  System.  For trust assets
registered  through the MERS(R)  System,  MERS(R)  shall serve as  mortgagee  of
record  solely  as a  nominee  in an  administrative  capacity  on behalf of the
trustee and shall not have any interest in any of those trust assets.

     In addition,  in most cases the  depositor  will,  as to each mortgage loan
that is not a Cooperative Loan, deliver or cause to be delivered to the trustee,
or to the custodian  hereinafter  referred to, the Mortgage Note endorsed to the
order of the  trustee or in blank,  the  mortgage  with  evidence  of  recording
indicated thereon and, except in the case of a mortgage registered with MERS(R),
an assignment of the mortgage in recordable  form.  With respect to any mortgage
not returned from the public recording office, the depositor will deliver a copy
of the mortgage  together with its certificate  stating that the original of the
mortgage was delivered to the recording  office.  In most cases,  assignments of
the  mortgage  loans to the trustee will be recorded in the  appropriate  public
office for real  property  records,  except in states  where,  in the opinion of
counsel  acceptable  to the trustee,  a recording is not required to protect the
trustee's  interest in the  mortgage  loan  against the claim of any  subsequent
transferee or any successor to or creditor of the depositor or the originator of
the mortgage  loan.  In other cases,  the Mortgage  Notes and  mortgages  may be
retained by sellers  unaffiliated  with the depositor or the servicer  under the
circumstances   described  in  the  related  prospectus   supplement,   and  the
assignments of mortgage into the name of the trustee will only be recorded under
the circumstances  described in the related prospectus supplement.  In addition,
with respect to any commercial  mortgage loans,  multifamily  mortgage loans and
Mixed-Use Mortgage Loans, the depositor will deliver or cause to be delivered to
the trustee, or the custodian hereinafter referred to, the assignment of leases,
rents and profits, if separate from the mortgage,  and an executed re-assignment
of assignment of leases, rents and profits.

     The depositor  will cause to be delivered to the trustee,  its agent,  or a
custodian,  with respect to any Cooperative  Loan, the related original security
agreement,  the  proprietary  lease  or  occupancy  agreement,  the  recognition
agreement,  an executed  financing  statement and the relevant stock certificate
and related blank stock

                                       27
<PAGE>

powers. The servicer will file in the appropriate  office a financing  statement
evidencing the trustee's security interest in each Cooperative Loan.

     The  trustee  or a  custodian  on  behalf  of the  trustee  will,  within a
specified  number of days  after  receipt  thereof,  review  the  mortgage  loan
documents.  If the seller or another entity specified in the related  prospectus
supplement  cannot cure any  material  omission or defect in the  mortgage  loan
documents within the time period specified in the related prospectus supplement,
the seller or other entity will be obligated to either  substitute  the affected
mortgage  loan for a substitute  mortgage loan or loans,  or to  repurchase  the
related  mortgage loan from the trustee within the time period  specified in the
related prospectus  supplement at a price equal to the principal balance thereof
as of the date of  purchase  or, in the case of a series as to which an election
has been made to treat the related trust fund as a REMIC, at some other price as
may be  necessary to avoid a tax on a  prohibited  transaction,  as described in
Section 860F(a) of the Code, in each case together with accrued  interest at the
applicable mortgage rate to the first day of the month following the repurchase,
plus the amount of any unreimbursed  Advances made by the servicer in respect of
the related  mortgage  loan. The servicer is obligated to enforce the repurchase
obligation  of the  seller,  to the  extent  described  above  under  "The Trust
Fund--Representations  by  Unaffiliated  Sellers;  Repurchases."  This  purchase
obligation  constitutes the sole remedy available to the  certificateholders  or
the trustee  for a material  omission or defect in a  constituent  document.  If
stated in the related  prospectus  supplement,  mortgage loans or contracts will
not be required to be  repurchased  or  substituted  for upon the  discovery  of
certain omissions or defects in a constituent document.

     If stated in the  applicable  prospectus  supplement,  with  respect to the
mortgage  loans in a  mortgage  pool,  the  depositor  or the  seller  will make
representations and warranties as to the types and geographical  distribution of
the related  mortgage  loans and as to the accuracy in all material  respects of
certain  information  furnished to the trustee in respect of each mortgage loan.
In addition, if stated in the related prospectus supplement,  the depositor will
represent  and warrant  that,  as of the Cut-off Date for the related  series of
certificates,  no mortgage loan is more than 30 days delinquent as to payment of
principal and interest.  Upon a breach of any  representation or warranty by the
depositor or the seller that  materially  and adversely  affects the interest of
the  certificateholders,  the depositor or the seller,  as  applicable,  will be
obligated either to cure the breach in all material  respects or to purchase the
mortgage loan at the purchase price set forth in the previous paragraph. In some
cases,  the  depositor  or the  seller  may  substitute  for  mortgage  loans as
described  in  the  succeeding   paragraph.   This  repurchase  or  substitution
obligation  constitutes the sole remedy available to the  certificateholders  or
the trustee for a breach of  representation  or warranty by the depositor or the
seller.

     Within the period specified in the related prospectus supplement, following
the date of issuance of a series of certificates,  the depositor,  the servicer,
sellers unaffiliated with the depositor or the related subservicer,  as the case
may be, may deliver to the trustee substitute mortgage loans in substitution for
any one or more of the mortgage loans  initially  included in the trust fund but
which  do not  conform  in one  or  more  respects  to the  description  thereof
contained  in the related  prospectus  supplement,  or as to which a breach of a
representation or warranty is discovered,  which breach materially and adversely
affects the interests of the certificateholders. The required characteristics of
any  substitute  mortgage loan and any additional  restrictions  relating to the
substitution of mortgage loans will generally be as described in this prospectus
under "The Trust Fund-- Representations by Unaffiliated Sellers; Repurchases."

     If  stated  in  related  prospectus  supplement,   mortgage  loans  may  be
transferred to the trust fund with  documentation of defects or omissions,  such
as missing notes or mortgages or missing title insurance policies.  If stated in
the related  prospectus  supplement,  none of the seller,  the  depositor or any
other person will be required to cure those defects or repurchase those mortgage
loans if the defect or omission is not cured.

     The trustee will be  authorized,  with the consent of the depositor and the
servicer,  to appoint a custodian pursuant to a custodial  agreement to maintain
possession  of  documents  relating  to the  mortgage  loans as the agent of the
trustee.

     Pursuant to each pooling and  servicing  agreement,  the  servicer,  either
directly or through  subservicers,  or a special servicer,  if applicable,  will
service and  administer the mortgage loans assigned to the trustee as more fully
set forth  below.  The special  servicer  may also be a party to the pooling and
servicing agreement with respect to a

                                       28
<PAGE>

series of certificates,  in which case the related  prospectus  supplement shall
set forth the duties and responsibilities of the special servicer thereunder.

Assignment of Contracts

     The depositor will cause the contracts constituting the contract pool to be
assigned to the trustee,  together  with  principal  and interest due on or with
respect to the contracts after the Cut-off Date, but not including principal and
interest due on or before the Cut-off Date. If the depositor is unable to obtain
a perfected  security interest in a contract prior to transfer and assignment to
the trustee,  the related  unaffiliated  seller will be obligated to  repurchase
that contract. The trustee,  concurrently with an assignment of contracts,  will
authenticate and deliver the certificates for that series. Each contract will be
identified  in a schedule  appearing  as an exhibit to the  related  pooling and
servicing agreement.  That contract schedule will specify,  with respect to each
contract, among other things:

o    the original  principal amount and the adjusted principal balance as of the
     close of business on the Cut-off Date;

o    the annual percentage rate;

o    the current scheduled monthly level payment of principal and interest; and

o    the maturity of the contract.

     In addition, in most cases the depositor, as to each contract, will deliver
or cause to be  delivered  to the  trustee,  or,  as  specified  in the  related
prospectus  supplement,  the  custodian,  the  original  contract  and copies of
documents and instruments  related to each contract and the security interest in
the manufactured  home securing each contract.  In other cases, the contract and
other documents and instruments may be retained by sellers unaffiliated with the
depositor  or the  servicer  under the  circumstances  described  in the related
prospectus supplement.  In order to give notice of the right, title and interest
of the  certificateholders  to the  contracts,  the depositor will cause a UCC-1
financing  statement to be executed by the depositor  identifying the trustee as
the secured party and identifying all contracts as collateral.  If stated in the
related prospectus supplement, the contracts will be stamped or otherwise marked
to reflect their  assignment from the depositor to the trust fund.  However,  in
most cases the  contracts  will not be stamped  or  otherwise  marked to reflect
their  assignment  from  the  depositor  to  the  trust  fund.  Therefore,  if a
subsequent  purchaser  were able to take  physical  possession  of the contracts
without  notice  of  the  assignment  to  the  trustee,   the  interest  of  the
certificateholders  in the  contracts  could be  defeated.  See  "Certain  Legal
Aspects of Mortgage Loans and Contracts--The Contracts" in this prospectus.

     The  trustee,  or a  custodian  on behalf of the  trustee,  will review the
contract documents within the number of days specified in the related prospectus
supplement  after  receipt  thereof.  If any  contract  document  is found to be
defective in any material  respect,  the related  seller  unaffiliated  with the
depositor must cure that defect within 90 days, or within some other period that
is specified in the related prospectus  supplement.  If the defect is not cured,
the related seller will repurchase the related contract or any property acquired
in respect thereof from the trustee at a price equal to:

o    the remaining unpaid principal balance of the defective contract; or

o    in the  case of a  repossessed  manufactured  home,  the  unpaid  principal
     balance of the defective contract immediately prior to the repossession; or

o    in the case of a series as to which an election  has been made to treat the
     related  trust fund as a REMIC,  at some other price as may be necessary to
     avoid a tax on a prohibited transaction, as described in Section 860F(a) of
     the Code;

in each case together  with accrued but unpaid  interest to the first day of the
month  following  repurchase,  plus any  unreimbursed  Advances  respecting  the
defective  contract.  The  repurchase  obligation  constitutes  the sole  remedy
available to the  certificateholders  or the trustee for a material  defect in a
contract document.

                                       29
<PAGE>

     If stated in the related prospectus supplement, each seller of contracts
will have represented, among other things, that:

o    immediately  prior to the transfer and  assignment  of the  contracts,  the
     seller  unaffiliated with the depositor had good title to, and was the sole
     owner of each  contract  and  there  had been no other  sale or  assignment
     thereof;

o    as of the date of the transfer to the depositor,  the contracts are subject
     to no offsets, defenses or counterclaims;

o    each  contract at the time it was made  complied in all  material  respects
     with  applicable  state and federal  laws,  including  usury,  equal credit
     opportunity and disclosure laws;

o    as of the date of the transfer to the  depositor,  each contract is a valid
     first lien on the related  manufactured  home and the related  manufactured
     home is free of material damage and is in good repair;

o    as of the date of the transfer to the  depositor,  no contract is more than
     30 days delinquent in payment and there are no delinquent tax or assessment
     liens against the related manufactured home; and

o    with respect to each contract,  the manufactured home securing the contract
     is covered by a standard hazard  insurance policy in the amount required in
     the related  pooling and servicing  agreement and that all premiums now due
     on the insurance have been paid in full.

     All of the  representations  and  warranties  of a seller in  respect  of a
contract  will  have  been  made as of the date on which  that  seller  sold the
contract to the  depositor  or its  affiliate,  which may be a date prior to the
date of initial  issuance of the related series of  certificates.  A substantial
period of time may have elapsed between the date as of which the representations
and warranties  were made and the later date of initial  issuance of the related
series of certificates.  Since the representations and warranties referred to in
the preceding paragraph are the only representations and warranties that will be
made by a seller, the seller's  repurchase  obligation  described below will not
arise if, during the period  commencing on the date of sale of a contract by the
seller to the depositor or its  affiliate,  the relevant event occurs that would
have given rise to the  repurchase  obligation  had the event  occurred prior to
sale of the affected contract.

     If a seller cannot cure a breach of any  representation or warranty made by
it in respect of a contract that  materially and adversely  affects the interest
of the  certificateholders  in that  contract  within 90 days,  or other  period
specified in the related prospectus supplement,  after notice from the servicer,
the related seller will be obligated to repurchase  the defective  contract at a
price equal to:

o    the principal balance thereof as of the date of the repurchase; or

o    in the case of a series as to which an election  has been made to treat the
     related  trust fund as a REMIC,  at some other price as may be necessary to
     avoid a tax on a prohibited transaction, as described in Section 860F(a) of
     the Code;

in each case together  with accrued and unpaid  interest to the first day of the
month  following  repurchase,  plus the amount of any  unreimbursed  Advances in
respect of the  defective  contract.  The  servicer  will be required  under the
applicable  pooling and servicing  agreement to enforce this  obligation for the
benefit of the trustee and the  certificateholders,  following  the practices it
would  employ  in its good  faith  business  judgment  were it the  owner of the
contract.  This repurchase  obligation will constitute the sole remedy available
to  certificateholders or the trustee for a breach of representation by a seller
unaffiliated with the depositor.

     Neither the  depositor  nor the  servicer  will be  obligated to purchase a
contract if a seller  defaults on its  obligation to do so, and no assurance can
be given that sellers  will carry out their  respective  repurchase  obligations
with respect to defective contracts. However, to the extent that a breach of the
representations  and  warranties  of a seller may also  constitute a breach of a
representation  made  by the  depositor,  the  depositor  may  have  a  purchase
obligation as described in this prospectus  under "The Trust Fund--The  Contract
Pools."

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<PAGE>

     If stated in the related  prospectus  supplement,  the  depositor  may make
certain limited representations with respect to the contracts.

Assignment of Mortgage Certificates

     Pursuant to the applicable pooling and servicing  agreement for a series of
certificates that includes Mortgage  Certificates in the related trust fund, the
depositor will cause the Mortgage  Certificates to be transferred to the trustee
together  with  all  principal  and  interest   distributed  on  those  Mortgage
Certificates  after the Cut-off Date.  Each Mortgage  Certificate  included in a
trust  fund will be  identified  in a  schedule  appearing  as an exhibit to the
applicable   pooling  and  servicing   agreement.   The  schedule  will  include
information as to the principal  balance of each Mortgage  Certificate as of the
date of  issuance  of the  certificates  and its  interest  rate,  maturity  and
original principal balance. In addition, steps will be taken by the depositor as
are  necessary  to cause the  trustee  to become  the  registered  owner of each
Mortgage  Certificate  which is  included in a trust fund and to provide for all
distributions on each Mortgage Certificate to be made directly to the trustee.

     In connection with the assignment of Mortgage  Certificates to the trustee,
the depositor  will make certain  representations  and warranties in the related
pooling and servicing  agreement as to, among other things, its ownership of the
Mortgage  Certificates.  In the event that these  representations and warranties
are breached,  and the breach or breaches  adversely affect the interests of the
certificateholders in the Mortgage Certificates,  the depositor will be required
to  repurchase  the  affected  Mortgage  Certificates  at a price  equal  to the
principal  balance thereof as of the date of purchase  together with accrued and
unpaid interest  thereon at the related  pass-through  rate to the  distribution
date for the Mortgage Certificates.  The Mortgage Certificates with respect to a
series may also be subject to  repurchase,  in whole but not in part,  under the
circumstances and in the manner described in the related prospectus  supplement.
Any amounts received in respect of repurchases of Mortgage  Certificates will be
distributed to  certificateholders  on the immediately  succeeding  distribution
date or such other date described in the related prospectus supplement.

     The applicable prospectus supplement will describe the characteristics of
the mortgage loans and contracts underlying the Mortgage Certificates.

     If stated in the related prospectus supplement, within the specified period
following the date of issuance of a series of  certificates,  the depositor may,
in lieu of the  repurchase  obligation  set forth  above,  and in certain  other
circumstances,  deliver to the trustee new Mortgage Certificates in substitution
for any one or more of the Mortgage Certificates initially included in the trust
fund. The required  characteristics or any such substitute Mortgage Certificates
and  any  additional  restrictions  relating  to the  substitution  of  Mortgage
Certificates will be set forth in the related prospectus supplement.

Servicing of Mortgage Loans and Contracts

     Each seller of a mortgage  loan or a contract  may act as the  servicer for
the  related  mortgage  loan or contract  pursuant  to a pooling  and  servicing
agreement.  A  representative  form of pooling and servicing  agreement has been
filed as an exhibit to the Registration  Statement of which this prospectus is a
part. The following description does not purport to be complete and is qualified
in its entirety by reference to the pooling and servicing agreement entered into
by the servicer,  the subservicer,  the depositor and the trustee. If a servicer
is appointed  pursuant to a separate  servicing  agreement,  that agreement will
contain servicing  provisions generally consistent with the provisions described
in this prospectus.

     Any  servicer  will be  required to perform the  customary  functions  of a
servicer, including:

o    collection  of payments  from  mortgagors  and obligors and  remittance  of
     collections to the servicer;

o    maintenance of primary  mortgage,  hazard  insurance,  FHA insurance and VA
     guarantees and filing and settlement of claims under those policies;

o    maintenance  of escrow  accounts of mortgagors  and obligors for payment of
     taxes,  insurance,  and other items  required  to be paid by the  mortgagor
     pursuant to terms of the related  mortgage loan or the obligor  pursuant to
     the related contract;

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<PAGE>

o    processing of assumptions or substitutions;

o    attempting to cure delinquencies;

o    supervising foreclosures or repossessions;

o    inspection and management of mortgaged properties, Cooperative Dwellings or
     manufactured homes under certain circumstances; and

o    maintaining   accounting   records  relating  to  the  mortgage  loans  and
     contracts.

     A  servicer  may  delegate  its  servicing   obligations   to   third-party
subservicers,  but will  continue to be  responsible  for the  servicing  of the
mortgage  loans or  contracts  pursuant  to the related  pooling  and  servicing
agreement.

     A servicer  or  subservicer  will also be  obligated  to make  Advances  in
respect of delinquent  installments  of principal and interest on mortgage loans
and contracts,  as described more fully in this prospectus under  "--Payments on
Mortgage  Loans" and  "--Payments on Contracts," and in respect of certain taxes
and insurance premiums not paid on a timely basis by mortgagors and obligors.

     As compensation for its servicing duties, a servicer or subservicer will be
entitled  to  amounts  from  payments  with  respect to the  mortgage  loans and
contracts  serviced  by it. A servicer or  subservicer  will also be entitled to
collect and retain, as part of its servicing compensation, certain fees and late
charges provided in the Mortgage Note or related instruments. A subservicer will
be reimbursed by the servicer for certain expenditures that it makes,  generally
to the same extent that the servicer  would be reimbursed  under the  applicable
pooling and servicing agreement.

Payments on Mortgage Loans

     The  servicer  will  establish  and  maintain  a  Certificate   Account  in
connection with each series.  The  Certificate  Account may be maintained with a
depository institution that is an affiliate of the servicer.

     The  servicer  will deposit in the  Certificate  Account for each series of
certificates on a daily basis the following payments and collections received or
made by it subsequent to the Cut-off Date,  other than payments due on or before
the Cut-off Date, in the manner set forth in the related prospectus supplement:

o    all payments on account of principal,  including principal prepayments,  on
     the related  mortgage loans,  net of any portion of payments that represent
     unreimbursed  or  unrecoverable  Advances  made by the related  servicer or
     subservicer;

o    all payments on account of interest on the related  mortgage loans,  net of
     any portion thereof retained by the servicer or subservicer, if any, as its
     servicing fee;

o    all Insurance  Proceeds or any  Alternative  Credit Support  established in
     lieu  of  any  insurance  and  described  in  the   applicable   prospectus
     supplement;

o    all Liquidation Proceeds, net of expenses of liquidation,  unpaid servicing
     compensation with respect to the related mortgage loans and unreimbursed or
     unrecoverable Advances made by the servicers or subservicers of the related
     mortgage loans;

o    all payments under the financial guaranty insurance policy,  surety bond or
     letter of credit, if any, with respect to that series;

o    all amounts  required to be deposited in the  Certificate  Account from the
     reserve fund, if any, for that series;

o    any Advances  made by a subservicer  or the servicer,  as described in this
     prospectus under "--Advances";

o    any  Buy-Down  Funds,  and, if  applicable,  investment  earnings  thereon,
     required to be deposited in the Certificate  Account,  as described  below;
     and

                                       32
<PAGE>

o    all  proceeds  of  any  mortgage  loan  repurchased  by the  servicer,  the
     depositor,  any subservicer or any seller  unaffiliated with the depositor,
     as  described  in this  prospectus  under  "The Trust  Fund--Mortgage  Loan
     Program--Representations   by   Unaffiliated   Sellers;   Repurchases"   or
     "--Assignment  of  Mortgage  Loans"  or  repurchased  by the  depositor  as
     described in this prospectus under "--Termination".

     If stated in the applicable prospectus supplement, the servicer, in lieu of
establishing a Certificate  Account,  may instead establish a Custodial Account.
If the  servicer  elects to  establish  a  Custodial  Account,  amounts  in that
Custodial Account,  after making the required deposits and withdrawals specified
in this  section  "--Payments  on  Mortgage  Loans,"  shall be  remitted  to the
Certificate   Account   maintained   by  the   trustee   for   distribution   to
certificateholders in the manner set forth in this prospectus and in the related
prospectus supplement. The servicer will also be required to advance any monthly
installment  of principal  and interest that was not timely  received,  less its
servicing fee, provided that this requirement shall only apply to the extent the
servicer  determines  in good  faith  any  advance  will be  recoverable  out of
insurance proceeds, proceeds of the liquidation of the related mortgage loans or
otherwise.

     In those cases where a subservicer is servicing a mortgage loan pursuant to
a  subservicing  agreement,  the  subservicer  will  establish  and  maintain  a
Servicing  Account  that will comply with either the  standards  set forth for a
Custodial  Account  or,  subject to the  conditions  set forth in the  servicing
related pooling and servicing agreement, meeting the requirements of the related
Rating Agency, and that is otherwise acceptable to the servicer. The subservicer
will be  required  to deposit  into the  Servicing  Account on a daily basis all
amounts  enumerated  above in  respect of the  mortgage  loans  received  by the
subservicer,  less its  servicing  compensation.  On the date  specified  in the
servicing related pooling and servicing  agreement,  the subservicer shall remit
to the  servicer  all funds held in the  Servicing  Account with respect to each
mortgage  loan.  Any payments or other amounts  collected by a special  servicer
with respect to any specially  serviced  mortgage loans will be deposited by the
related special servicer as set forth in the related prospectus supplement.

     With respect to each series which contains Buy-Down Loans, if stated in the
related  prospectus  supplement,  the servicer or the related  subservicer  will
establish a Buy-Down  Fund.  Amounts on deposit in the Buy-Down  Fund,  together
with  investment  earnings  thereon if  specified in the  applicable  prospectus
supplement, will be used to support the full monthly payments due on the related
Buy-Down  Loans on a level debt  service  basis.  Neither the  servicer  nor the
depositor  will be  obligated  to add to the  Buy-Down  Fund  should  investment
earnings prove  insufficient  to maintain the scheduled level of payments on the
Buy-Down Loans. To the extent that any insufficiency is not recoverable from the
mortgagor  under  the  terms of the  related  Mortgage  Note,  distributions  to
certificateholders  will be affected.  With respect to each Buy-Down  Loan,  the
servicer will  withdraw  from the Buy-Down  Fund and deposit in the  Certificate
Account  on or  before  each  distribution  date the  amount,  if any,  for each
Buy-Down Loan that, when added to the amount due on that date from the mortgagor
on the related Buy-Down Loan,  equals the full monthly payment that would be due
on the Buy-Down Loan if it were not subject to a buy-down plan.

     If stated in the prospectus  supplement  with respect to a series,  in lieu
of, or in addition to the foregoing, the depositor may deliver cash, a letter of
credit or a guaranteed  investment  contract to the trustee to fund the Buy-Down
Fund for that series, which shall be drawn upon by the trustee in the manner and
at the times specified in the related prospectus supplement.

Payments on Contracts

     A Certificate Account meeting the requirements set forth under "Description
of the Certificates--Payments on Mortgage Loans" will be established in the name
of the trustee.

     There will be deposited in the Certificate  Account or a Custodial  Account
on a daily basis the following  payments and collections  received or made by it
subsequent to the Cut-off Date,  including  scheduled  payments of principal and
interest  due after the Cut-off  Date but  received by the servicer on or before
the Cut-off Date:

o    all  obligor  payments  on  account  of  principal,   including   principal
     prepayments, on the contracts;

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<PAGE>

o    all obligor  payments on account of interest on the  contracts,  net of the
     servicing fee;

o    all  Liquidation  Proceeds  received  with respect to contracts or property
     acquired in respect thereof by foreclosure or otherwise;

o    all Insurance  Proceeds  received with respect to any contract,  other than
     proceeds  to be applied to the  restoration  or repair of the  manufactured
     home or released to the obligor;

o    any Advances made as described under "--Advances" and certain other amounts
     required  under the pooling and servicing  agreement to be deposited in the
     Certificate Account;

o    all amounts  received  from any credit  support  provided with respect to a
     series of certificates;

o    all  proceeds  of any  contract or  property  acquired  in respect  thereof
     repurchased by the servicer,  the depositor or otherwise as described above
     or under "--Termination" below; and

o    all amounts,  if any, required to be transferred to the Certificate Account
     from the reserve fund.

Collection of Payments on Mortgage Certificates

     The  Mortgage  Certificates  included  in the trust fund with  respect to a
series of certificates will be registered in the name of the trustee so that all
distributions  thereon  will be made  directly to the  trustee.  The pooling and
servicing  agreement  will  require  the  trustee,  if it  has  not  received  a
distribution with respect to any Mortgage Certificate by the second business day
after the date on which that  distribution  was due and payable  pursuant to the
terms of the Mortgage Certificate,  to request the issuer or guarantor,  if any,
of the Mortgage  Certificate to make payment as promptly as possible and legally
permitted  and to take  whatever  legal  action  against the  related  issuer or
guarantor as the trustee deems  appropriate under the  circumstances,  including
the prosecution of any claims in connection therewith. The reasonable legal fees
and expenses  incurred by the trustee in connection  with the prosecution of any
legal  action will be  reimbursable  to the  trustee out of the  proceeds of any
action and will be retained by the trustee prior to the deposit of any remaining
proceeds  in  the   Certificate   Account   pending   distribution   thereof  to
certificateholders  of the  affected  series.  In the event that the trustee has
reason to believe that the proceeds of any legal action may be  insufficient  to
reimburse it for its projected legal fees and expenses,  the trustee will notify
the related  certificateholders that it is not obligated to pursue any available
remedies unless  adequate  indemnity for its legal fees and expenses is provided
by those certificateholders.

Distributions on Certificates

     On each  distribution  date with respect to a series of  certificates,  the
servicer will withdraw from the applicable  Certificate Account funds on deposit
in that  Certificate  Account and  distribute,  or, if stated in the  applicable
prospectus supplement, will withdraw from the Custodial Account funds on deposit
in that Custodial Account and remit to the trustee,  who will distribute,  those
funds to  certificateholders  of  record  on the  applicable  Record  Date.  The
distributions  shall  occur in the manner  described  in this  prospectus  under
"Description of the  Certificates--Distributions  of Principal and Interest" and
in the related prospectus supplement. Those funds shall consist of the aggregate
of all  previously  undistributed  payments on account of  principal,  including
principal prepayments,  Insurance Proceeds and Liquidation Proceeds, if any, and
interest  received  after  the  Cut-off  Date and on or prior to the  applicable
Determination Date, except:

o    all payments that were due on or before the Cut-off Date;

o    all principal prepayments received during the month of distribution and all
     payments of principal and interest due after the related Due Period;

o    all payments which  represent  early receipt,  other than  prepayments,  of
     scheduled  payments  of  principal  and  interest  due on a date  or  dates
     subsequent to the first day of the month of distribution;

o    amounts received on particular mortgage loans or contracts as late payments
     of  principal  or interest  and  respecting  which the servicer has made an
     unreimbursed Advance;

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<PAGE>

o    amounts  representing  reimbursement for previously  unreimbursed  expenses
     incurred or Advances made by the servicer or subservicer; and

o    that portion of each  collection of interest on a particular  mortgage loan
     in the related  mortgage  pool or on a  particular  contract in the related
     contract pool that represents:

(1)  servicing  compensation  to the servicer  and, if  applicable,  the special
     servicer; or

(2)  amounts  payable  to the entity or  entities  specified  in the  applicable
     prospectus supplement or permitted withdrawals from the Certificate Account
     out of payments under the financial guaranty insurance policy,  surety bond
     or letter of credit, if any, with respect to the series.

     No later than the business day immediately  preceding the distribution date
for a series of  certificates,  the  servicer  will  furnish a statement  to the
trustee  setting  forth the  information  that is  necessary  for the trustee to
determine  the  amount of  distributions  to be made on the  certificates  and a
statement  setting forth certain  information with respect to the mortgage loans
or contracts.

     If  stated  in the  applicable  prospectus  supplement,  the  trustee  will
establish and maintain the Certificate Account for the benefit of the holders of
the  certificates  of the related series in which the trustee shall deposit,  as
soon as practicable after receipt,  each distribution made to the trustee by the
servicer,  as set forth above,  with respect to the mortgage loans or contracts,
any  distribution   received  by  the  trustee  with  respect  to  the  Mortgage
Certificates,  if any,  included in the trust fund and deposits from any reserve
fund or GPM Fund. If stated in the applicable  prospectus  supplement,  prior to
making any distributions to certificateholders,  any portion of the distribution
on the Mortgage  Certificates that represents  servicing  compensation,  if any,
payable to the trustee shall be deducted and paid to the trustee.

     Funds on deposit in the  Certificate  Account  may be  invested in Eligible
Investments  maturing in general not later than the business day  preceding  the
next distribution date. All income and gain realized from any investment will be
for the benefit of the  servicer,  or other  entity if stated in the  applicable
prospectus supplement.  The servicer or other entity will be required to deposit
the amount of any losses  incurred  with respect to  investments  out of its own
funds, when realized.

     The timing and method of distribution  of funds in the Certificate  Account
to classes  or  subclasses  of  certificates  having  differing  terms,  whether
subordinated or not, to the extent not described in this prospectus, will be set
forth in the related prospectus supplement.

Special Distributions

     To the extent specified in the prospectus  supplement  relating to a series
of  certificates,  one or more classes of  certificates  that do not provide for
monthly  distribution  dates may receive special  distributions  in reduction of
Certificate  Principal  Balance  in any  month,  other  than a month  in which a
distribution date occurs, if, as a result of principal prepayments on the assets
in  the  related  trust  fund  and/or  low  reinvestment   yields,  the  trustee
determines,  based on assumptions specified in the related pooling and servicing
agreement,  that  the  amount  of  cash  anticipated  to be on  deposit  in  the
Certificate  Account on the next distribution date for that series and available
to be  distributed  to the  holders  of the  certificates  of those  classes  or
subclasses may be less than the sum of:

o    the interest  scheduled to be distributed to holders of the certificates of
     those classes or subclasses; and

o    the amount to be distributed in reduction of Certificate  Principal Balance
     on those certificates on that distribution date.

Any  special  distributions  will be made in the same  priority  and  manner  as
distributions in reduction of Certificate Principal Balance would be made on the
next distribution date.

                                       35
<PAGE>

Reports to Certificateholders

     The  servicer  or the  trustee  will  include  with  each  distribution  to
certificateholders  of record of the related series, or within a reasonable time
thereafter,  a  statement  generally  setting  forth,  among other  things,  the
following information, if applicable:

      (1)  to  each  holder  of  a  certificate,   the  amount  of  the  related
           distribution  allocable  to  principal  of the assets of the  related
           trust  fund,  separately  identifying  the  aggregate  amount  of any
           prepayments of principal on the related mortgage loans,  contracts or
           mortgage loans underlying the related Mortgage  Certificates included
           in that trust fund, and the portion, if any, advanced by the servicer
           or a subservicer;

      (2)  to  each  holder  of  a  certificate,   the  amount  of  the  related
           distribution allocable to interest on the assets of the related trust
           fund  and  the  portion,  if  any,  advanced  by  the  servicer  or a
           subservicer;

      (3)  in  the  case  of  a  series  of   certificates   with  a   variable
           Pass-Through   Rate,  the   Pass-Through   Rate  applicable  to  the
           distribution;

      (4)  the  amount  of  coverage  remaining  under  the  financial  guaranty
           insurance  policy,  surety  bond,  letter of credit,  pool  insurance
           policy,  special hazard insurance policy,  mortgagor bankruptcy bond,
           or reserve fund as applicable,  in each case,  after giving effect to
           any amounts with respect thereto distributed to certificateholders on
           that distribution date;

      (5)  in  the  case  of  a  series  of  certificates  benefiting  from  the
           Alternative  Credit  Support  described  in  the  related  prospectus
           supplement,  the  amount of  coverage  under the  Alternative  Credit
           Support  after  giving  effect to any amounts  with  respect  thereto
           distributed to certificateholders on the distribution date;

      (6)  the aggregate unpaid  principal  balance of the assets of the related
           trust fund as of a date not earlier than the distribution  date after
           giving   effect   to   payments   of   principal    distributed    to
           certificateholders on the distribution date;

      (7)  the book value of any  collateral  acquired by the mortgage  pool or
           contract pool through foreclosure, repossession or otherwise;

      (8)  the number  and  aggregate  principal  amount of  mortgage  loans or
           contracts one month, two months, and three or more delinquent; and

      (9)  the remaining balance, if any, in the Pre-Funding Account.

     In  addition,  within a  reasonable  period  of time  after the end of each
calendar  year,  the servicer,  or the trustee,  if specified in the  applicable
prospectus  supplement,  will cause to be furnished to each certificateholder of
record at any time during that  calendar  year a report as to the  aggregate  of
amounts reported  pursuant to (1) and (2) above and other  information as in the
judgment of the servicer or the  trustee,  as the case may be, is needed for the
certificateholder  to prepare its tax return,  as applicable,  for that calendar
year or, in the event such  person was a  certificateholder  of record  during a
portion of that calendar year, for the applicable portion of that year.

Advances

     If stated in the related  prospectus  supplement,  each subservicer and the
servicer,  with respect to mortgage  loans or contracts  serviced by it and with
respect to  Advances  required to be made by the  subservicers  that were not so
made,  will be  obligated to advance  funds in an amount equal to the  aggregate
scheduled  installments of payments of principal and interest, as reduced by the
servicing  fee, that were due on the due date with respect to a mortgage loan or
contract  and that  were  delinquent,  as of the close of  business  on the date
specified in the pooling and servicing  agreement,  to be remitted no later than
the close of business on the business day immediately preceding the distribution
date,  subject  to  their  respective  determinations  that  such  advances  are
reimbursable under any financial guaranty insurance policy,  surety bond, letter
of credit, pool insurance policy,  primary mortgage insurance policy,  mortgagor
bankruptcy bond, from the proceeds of Alternative  Credit Support,  from cash in
the reserve fund, or  liquidation  proceeds from the mortgage loan or contracts.
In making  Advances,  the  subservicers and servicer will endeavor to maintain a
regular   flow  of   scheduled   interest   and   principal   payments   to  the
certificateholders,

                                       36
<PAGE>

rather than to guarantee or insure against losses. Any Advances are reimbursable
to the  subservicer or servicer out of related  recoveries on the mortgage loans
respecting  which  those  amounts  were  advanced.  In  addition,  Advances  are
reimbursable  from  cash in the  reserve  fund,  the  Servicing  or  Certificate
Accounts to the extent that the subservicer or the servicer, as the case may be,
shall determine that any Advances previously made are not ultimately recoverable
from other sources.

     The subservicers and the servicer  generally will also be obligated to make
advances in respect of certain  taxes,  insurance  premiums and, if  applicable,
property  protection  expenses  not paid by  mortgagors  or obligors on a timely
basis and,  to the  extent  deemed  recoverable,  foreclosure  costs,  including
reasonable  attorney's fees.  "Property  protection  expenses"  comprise certain
costs and  expenses  incurred  in  connection  with  defaulted  mortgage  loans,
acquiring title or management of REO Property or the sale of defaulted  mortgage
loans or REO  Properties,  as more fully  described  in the  related  prospectus
supplement.  Funds so advanced are reimbursable out of recoveries on the related
mortgage loans.  This right of reimbursement  for any advance by the servicer or
subservicer will be prior to the rights of the certificateholders to receive any
amounts  recovered with respect to the related  mortgage loans or contracts.  If
stated  in the  applicable  prospectus  supplement,  the  subservicers  and  the
servicer will also be required to advance an amount  necessary to provide a full
month's interest,  adjusted to the applicable  Pass-Through  Rate, in connection
with full or partial  prepayments  of the  mortgage  loans or  contracts.  Those
Advances will not be reimbursable to the subservicers or the servicer.

Collection and Other Servicing Procedures

     The servicer will be responsible  for servicing the mortgage loans pursuant
to the related  pooling and  servicing  agreement  for the related  series.  The
servicer may subcontract the servicing of all or a portion of the mortgage loans
to one or more  subservicers  and  may  subcontract  the  servicing  of  certain
commercial mortgage loans,  multifamily mortgage loans and/or Mixed-Use Mortgage
Loans that are in default or otherwise  require  special  servicing to a special
servicer,  and certain  information with respect to the special servicer will be
set forth in the related prospectus  supplement.  Any subservicer or any special
servicer  may be an  affiliate  of the  depositor  and may have  other  business
relationships with depositor and its affiliates.

     The servicer,  directly or through the subservicers or a special  servicer,
as the case may be, will make reasonable  efforts to collect all payments called
for  under  the  mortgage  loans or  contracts  and  will,  consistent  with the
applicable pooling and servicing agreement and any applicable financial guaranty
insurance policy, surety bond, letter of credit, pool insurance policy,  special
hazard insurance policy, primary mortgage insurance policy, mortgagor bankruptcy
bond, or Alternative Credit Support, follow the collection procedures it follows
with respect to mortgage  loans or contracts  serviced by it that are comparable
to the mortgage loans or contracts, except when, in the case of FHA or VA Loans,
applicable  regulations  require  otherwise.  Consistent  with  the  above,  the
servicer may, in its discretion, waive any late payment charge or any prepayment
charge or penalty  interest in connection with the prepayment of a mortgage loan
or  contract  or extend the due dates for  payments  due on a  Mortgage  Note or
contract for a period of not greater than 270 days,  provided that the insurance
coverage  for that  mortgage  loan or contract or the  coverage  provided by any
financial  guaranty   insurance  policy,   surety  bond,  letter  of  credit  or
Alternative Credit Support, will not be adversely affected.

     Under the related  pooling and servicing  agreement,  the servicer,  either
directly or through subservicers or a special servicer,  to the extent permitted
by law, may  establish  and maintain an escrow in which  mortgagors  or obligors
will be  required  to deposit  amounts  sufficient  to pay  taxes,  assessments,
mortgage  and  hazard  insurance  premiums  and  other  comparable  items.  This
obligation may be satisfied by the provision of insurance  coverage against loss
occasioned  by the failure to escrow  insurance  premiums  rather  than  causing
escrows to be made.  The  special  servicer,  if any,  will be required to remit
amounts received for the purposes  described in this paragraph on mortgage loans
serviced by it for deposit in the related escrow  account,  and will be entitled
to direct the servicer to make  withdrawals  from that escrow  account as may be
required for servicing of the related mortgage loans. Withdrawals from an escrow
account may be made to effect timely payment of taxes, assessments, mortgage and
hazard insurance,  to refund to mortgagors or obligors amounts  determined to be
overages,  to pay interest to  mortgagors or obligors on balances in that escrow
account,  if  required,  and to clear and  terminate  that escrow  account.  The
servicer will be responsible for the  administration  of each escrow account and
will be obliged to make advances to those  accounts when a deficiency  exists in
any of those escrow accounts.  Alternatively,  in lieu of establishing an escrow
account,  the servicer may procure a performance bond or other form of insurance
coverage,


                                       37
<PAGE>

in an amount  acceptable to the related Rating Agency,  covering loss occasioned
by the failure to escrow such amounts.

Standard Hazard Insurance

     Except to the extent  specified  in a related  prospectus  supplement,  the
terms of each pooling and servicing  agreement  will require the servicer or the
special  servicer,  if any, to cause to be maintained  for each mortgage loan or
contract  that it services,  and the  servicer  will be required to maintain for
each  mortgage  loan or contract  serviced by it directly,  a policy of standard
hazard insurance covering the mortgaged property underlying the related mortgage
loan or manufactured  home underlying the related contract in an amount at least
equal to the maximum  insurable value of the  improvements  securing the related
mortgage loan or contract or the principal  balance of the related mortgage loan
or contract, whichever is less.

     Each  subservicer,  the special servicer,  if any, or the servicer,  as the
case may be,  shall also be  required to  maintain  on  property  acquired  upon
foreclosure, or deed in lieu of foreclosure, of any mortgage loan or contract, a
standard hazard insurance policy. Any amounts collected by the subservicer,  the
special  servicer,  if any, or the  servicer  under those  policies,  other than
amounts to be applied to the restoration or repair of the mortgaged  property or
manufactured  home  or  released  to the  borrower  in  accordance  with  normal
servicing  procedures,  shall be deposited in the related  Servicing Account for
deposit  in the  Certificate  Account  or, in the case of the  servicer,  may be
deposited  directly  into  the  Certificate   Account.   Any  cost  incurred  in
maintaining  any  insurance  shall not, for the purpose of  calculating  monthly
distributions  to  certificateholders,  be added to the amount  owing  under the
mortgage loan or contract,  notwithstanding  that the terms of the mortgage loan
or contract may so permit.  The cost incurred in maintaining any insurance shall
be  recoverable  by the  servicer  or the  special  servicer,  if  any,  only by
withdrawal  of funds  from the  Servicing  Account  or by the  servicer  only by
withdrawal  from the  Certificate  Account,  as  described  in the  pooling  and
servicing agreement.

     No  earthquake  or other  additional  insurance  is to be  required  of any
borrower or  maintained  on property  acquired in respect of a mortgage  loan or
contract, other than pursuant to applicable laws and regulations as shall at any
time be in force and as shall require earthquake or additional  insurance.  When
the  mortgaged  property  or  manufactured  home  is  located  at  the  time  of
origination  of the mortgage  loan or contract in a federally  designated  flood
area, the related subservicer or the special servicer,  if any, or the servicer,
in the case of each  mortgage  loan or contract  serviced by it  directly,  will
cause flood insurance to be maintained,  to the extent available, in those areas
where flood  insurance is required  under the National  Flood  Insurance  Act of
1968, as amended.

     The depositor  will not require that a standard  hazard or flood  insurance
policy be maintained on the  Cooperative  Dwelling  relating to any  Cooperative
Loan. Generally, the Cooperative itself is responsible for maintenance of hazard
insurance for the property owned by the Cooperative and the  tenant-stockholders
of that Cooperative do not maintain individual hazard insurance policies. To the
extent,  however,  that a Cooperative and the related  borrower on a Cooperative
Loan do not  maintain  insurance  or do not  maintain  adequate  coverage or any
insurance  proceeds are not applied to the restoration of damaged property,  any
damage to that borrower's  Cooperative  Dwelling or that Cooperative's  building
could  significantly  reduce the value of the  collateral  securing  the related
Cooperative Loan to the extent not covered by other credit support.

     The related  pooling and  servicing  agreement  will permit the servicer to
obtain and maintain a blanket  policy  insuring  against hazard losses on all of
the related  mortgage  loans or  contracts,  in lieu of  maintaining  a standard
hazard  insurance  policy for each  mortgage  loan or contract that it services.
This blanket policy may contain a deductible  clause, in which case the servicer
will,  in the event that there has been a loss that would have been covered by a
policy absent the deductible,  deposit in the Certificate Account the amount not
otherwise  payable under the blanket  policy  because of the  application of the
deductible clause.

     Since the amount of hazard  insurance to be maintained on the  improvements
securing the mortgage  loans or contracts may decline as the principal  balances
owing thereon decrease,  and since properties have  historically  appreciated in
value over time, in the event of partial loss, hazard insurance  proceeds may be
insufficient  to fully restore the damaged  mortgaged  property or  manufactured
home. See "Description of  Insurance--Special  Hazard Insurance  Policies" for a
description of the limited  protection  afforded by a special  hazard  insurance
policy against

                                       38
<PAGE>

losses  occasioned by certain  hazards that are otherwise  uninsured  against as
well as against losses caused by the application of the  coinsurance  provisions
contained in the standard hazard insurance policies.

     With respect to mortgage  loans secured by commercial  property,  Mixed-Use
Property and multifamily property,  certain additional insurance policies may be
required,  including,  but not limited to, loss of rent  endorsements,  business
interruption  insurance and comprehensive  public liability  insurance,  and the
related  pooling and  servicing  agreement  may require the servicer to maintain
public liability insurance with respect to any related REO Properties.  Any cost
incurred by the servicer in  maintaining  any insurance  policy will be added to
the  amount  owing  under  the  related  mortgage  loan  where the terms of that
mortgage loan so permit; provided,  however, that the addition of that cost will
not be taken into account for purposes of  calculating  the  distribution  to be
made to  certificateholders.  These costs may be recovered by the servicer  from
the  Certificate  Account,  with  interest  thereon,  as provided by the related
pooling and servicing agreement.

Special Hazard Insurance

     If  stated in the  related  prospectus  supplement,  the  servicer  will be
required to exercise its best reasonable  efforts to maintain the special hazard
insurance policy, if any, with respect to a series of certificates in full force
and effect,  unless  coverage  thereunder has been exhausted  through payment of
claims,  and will pay the premium for the special hazard  insurance  policy on a
timely  basis;  provided,  however,  that  the  servicer  shall be under no such
obligation  if coverage  under the pool  insurance  policy with  respect to that
series has been exhausted.  If the special hazard  insurance policy is cancelled
or  terminated  for any  reason,  other  than the  exhaustion  of  total  policy
coverage,  the servicer will exercise its best reasonable efforts to obtain from
another insurer a replacement  policy comparable to the special hazard insurance
policy with a total coverage that is equal to the then existing  coverage of the
special hazard  insurance  policy;  provided that if the cost of any replacement
policy is  greater  than the cost of the  terminated  special  hazard  insurance
policy,  the amount of coverage under the replacement  special hazard  insurance
policy  may be  reduced to a level  such that the  applicable  premium  will not
exceed the cost of the special hazard insurance policy that was replaced.

Pool Insurance

     To the extent specified in a related  prospectus  supplement,  the servicer
will exercise its best  reasonable  efforts to maintain a pool insurance  policy
with respect to a series of  certificates  in effect  throughout the term of the
pooling and servicing  agreement,  unless coverage thereunder has been exhausted
through  payment of claims,  and will pay the  premiums  for the pool  insurance
policy on a timely basis.  In the event that the related pool insurer  ceases to
be a  qualified  insurer  because  it is not  qualified  to  transact a mortgage
guaranty  insurance  business under the laws of the state of its principal place
of business or any other state which has  jurisdiction  over the pool insurer in
connection with the pool insurance  policy,  or if the pool insurance  policy is
cancelled  or  terminated  for any reason,  other than the  exhaustion  of total
policy  coverage,  the servicer  will  exercise its best  reasonable  efforts to
obtain a replacement  policy of pool insurance  comparable to the pool insurance
policy  and may  obtain a total  coverage  that is  equal  to the then  existing
coverage of the special hazard  insurance  policy;  provided that if the cost of
any replacement policy is greater than the cost of the terminated pool insurance
policy,  the amount of coverage under the replacement  pool insurance policy may
be reduced to a level such that the applicable  premium will not exceed the cost
of the pool insurance policy that was replaced.

Primary Mortgage Insurance

     To the extent specified in the related prospectus supplement,  the servicer
will be required to keep in force and effect for each  mortgage  loan secured by
single  family  property  serviced by it  directly,  and each  subservicer  of a
mortgage loan secured by single family property will be required to keep in full
force and effect with respect to each mortgage loan serviced by it, in each case
to the extent required by the underwriting standards of the depositor, a primary
mortgage  insurance  policy  issued by a qualified  insurer  with regard to each
mortgage loan for which coverage is required pursuant to the applicable  pooling
and servicing agreement and to act on behalf of the trustee, or "insured," under
each primary mortgage insurance policy. Neither the servicer nor the subservicer
will be  permitted to cancel or refuse to renew any primary  mortgage  insurance
policy in effect at the date of the initial issuance of a series of certificates
that is required to be kept in force  under the  related  pooling and  servicing
agreement  unless  a  replacement  primary  mortgage  insurance  policy  for the
cancelled or non-renewed policy is



                                       39
<PAGE>

maintained  with an insurer  whose  claims-paying  ability is  acceptable to the
related Rating Agency. See "Description of Insurance--Primary Mortgage Insurance
Policies."

Mortgagor Bankruptcy Bond

     If stated in the related prospectus supplement,  the servicer will exercise
its best reasonable efforts to maintain a mortgagor bankruptcy bond for a series
of certificates in full force and effect  throughout the term of the pooling and
servicing  agreement,  unless  coverage  thereunder has been  exhausted  through
payment of claims,  and will pay the premiums for the mortgagor  bankruptcy bond
on a timely basis.  At the request of the depositor,  coverage under a mortgagor
bankruptcy  bond will be  cancelled  or  reduced by the  servicer  to the extent
permitted  by the related  Rating  Agency,  provided  that any  cancellation  or
reduction does not adversely affect the then current rating of that series.  See
"Description of Insurance--Mortgagor Bankruptcy Bond."

Presentation of Claims

     The servicer, on behalf of itself, the trustee and the  certificateholders,
will  present  claims to HUD,  the VA,  the pool  insurer,  the  special  hazard
insurer,  the issuer of the mortgagor bankruptcy bond, and each primary mortgage
insurer,  as  applicable,  and take whatever  reasonable  steps are necessary to
permit  recovery under the related  insurance  policies or mortgagor  bankruptcy
bond, if any, with respect to a series  concerning  defaulted  mortgage loans or
contracts or mortgage  loans or  contracts  that are the subject of a bankruptcy
proceeding.  All  collections  by the  servicer  under any FHA  insurance  or VA
guarantee,  any pool insurance policy,  any primary mortgage insurance policy or
any  mortgagor  bankruptcy  bond and,  where the related  property  has not been
restored,  any special  hazard  insurance  policy,  are to be  deposited  in the
Certificate  Account,  subject to withdrawal as heretofore  described.  In those
cases in which a mortgage  loan or contract is  serviced by a  subservicer,  the
subservicer,  on behalf of itself, the trustee and the certificateholders,  will
present claims to the applicable primary mortgage insurer and to the FHA and the
VA, as  applicable,  and all  collections  thereunder  shall be deposited in the
Servicing Account, subject to withdrawal, as set forth above, for deposit in the
Certificate Account.

     If any property  securing a defaulted  mortgage loan or contract is damaged
and proceeds,  if any, from the related  standard hazard insurance policy or the
applicable  special  hazard  insurance  policy are  insufficient  to restore the
damaged  property to a condition  sufficient to permit  recovery  under any pool
insurance policy or any primary mortgage insurance policy,  neither the servicer
nor the  subservicer,  as the case may be,  will be  required  to expend its own
funds to restore the damaged property unless it determines,  and, in the case of
a determination by a subservicer, the servicer agrees:

o    that the restoration  will increase the proceeds to  certificateholders  on
     liquidation  of the mortgage loan or contract  after  reimbursement  of the
     expenses  incurred by the subservicer or the servicer,  as the case may be;
     and

o    that the expenses will be recoverable  through  proceeds of the sale of the
     mortgaged  property or proceeds of any related pool insurance  policy,  any
     related primary mortgage insurance policy or otherwise.

     If recovery under a pool insurance  policy or any related primary  mortgage
insurance  policy  is not  available  because  the  related  subservicer  or the
servicer  has been unable to make the above  determinations  or  otherwise,  the
subservicer or the servicer is nevertheless  obligated to follow whatever normal
practices and procedures  are deemed  necessary or advisable to realize upon the
defaulted  mortgage  loan. If the proceeds of any  liquidation  of the mortgaged
property  or  manufactured  home are  less  than the  principal  balance  of the
defaulted mortgage loan or contract, respectively, plus interest accrued thereon
at the  Pass-Through  Rate,  and if  coverage  under any other  method of credit
support with respect to that series is  exhausted,  the related  trust fund will
realize a loss in the amount of the  difference  plus the  aggregate of expenses
incurred by the subservicer or the servicer in connection with those proceedings
and which are reimbursable under the related pooling and servicing agreement. In
the  event  that any  proceedings  result  in a total  recovery  that is,  after
reimbursement  to the subservicer or the servicer of its expenses,  in excess of
the principal  balance of the related  mortgage loan or contract,  together with
accrued and unpaid interest  thereon at the applicable  Pass-Through  Rates, the
subservicer and the servicer will be entitled to

                                       40
<PAGE>

withdraw  amounts  representing  normal  servicing  compensation  on the related
mortgage loan or contract from the Servicing Account or the Certificate Account,
as the case may be.

Enforcement of Due-on-Sale Clauses; Realization Upon Defaulted Mortgage Loans

     Each  pooling  and  servicing   agreement  with  respect  to   certificates
representing  interests in a mortgage pool will provide that, when any mortgaged
property has been conveyed by the related borrower,  the related  subservicer or
the  servicer,  as the case may be, will,  to the extent it has knowledge of the
conveyance, exercise its rights to accelerate the maturity of that mortgage loan
under any "due-on-sale"  clause applicable thereto, if any, unless it reasonably
believes that enforcement of the  "due-on-sale"  clause is not exercisable under
applicable law or regulations,  would result in loss of insurance  coverage with
respect  to that  mortgage  loan or  would  not be in the best  interest  of the
related series of  certificateholders.  In any case where the due-on-sale clause
will not be exercised,  the subservicer or the servicer is authorized to take or
enter into an assumption and  modification  agreement from or with the person to
whom the  related  mortgaged  property  has  been or is  about  to be  conveyed,
pursuant to which that person becomes liable under the Mortgage Note and, unless
prohibited  by  applicable  state law, the  mortgagor  remains  liable  thereon,
provided  that  the  mortgage  loan  will  continue  to be  covered  by any pool
insurance policy and any related primary mortgage  insurance policy. In the case
of an FHA Loan,  such an  assumption  can occur  only with HUD  approval  of the
substitute mortgagor. Each subservicer and the servicer will also be authorized,
with the prior approval of the insurer under any required insurance policies, to
enter into a substitution of liability  agreement with that person,  pursuant to
which the  original  mortgagor  is released  from  liability  and that person is
substituted as mortgagor and becomes liable under the Mortgage Note.

     Under each  pooling  and  servicing  agreement  relating  to a series,  the
subservicer  or the  servicer,  as the  case  may  be,  will  foreclose  upon or
otherwise  comparably convert the ownership of properties  securing those of the
related  mortgage  loans as come into and continue in default and as to which no
satisfactory  arrangements can be made for collection of delinquent payments. In
connection  with the  foreclosure or other  conversion,  the  subservicer or the
servicer will follow whatever  practices and procedures are deemed  necessary or
advisable  and as shall be normal and usual in its  general  mortgage  servicing
activities,  except when, in the case of FHA or VA Loans, applicable regulations
require  otherwise.  However,  neither the  subservicer nor the servicer will be
required to expend its own funds in connection  with any  foreclosure or towards
the  restoration  of any  property  unless it  determines  and, in the case of a
determination by a subservicer, the servicer agrees:

o    that the  restoration  and/or  foreclosure  will  increase  the proceeds of
     liquidation  of the  related  mortgage  loan  to  certificateholders  after
     reimbursement to itself for expenses; and

o    that the expenses  will be  recoverable  to it either  through  Liquidation
     Proceeds,  Insurance  Proceeds,  payments  under  the  letter  of credit or
     amounts in the reserve fund, if any, with respect to the related series, or
     otherwise.

     Any  prospective  purchaser of a  Cooperative  Dwelling  will  generally be
required  to obtain  the  approval  of the  board of  directors  of the  related
Cooperative  before  purchasing  the  shares  and  acquiring  rights  under  the
proprietary  lease or occupancy  agreement  securing the  Cooperative  Loan. See
"Certain  Legal  Aspects  of the  Mortgage  Loans  and  Contracts--The  Mortgage
Loans--Foreclosure"  in this  prospectus.  This approval is usually based on the
purchaser's  income  and net worth and  numerous  other  factors.  Although  the
Cooperative's  approval is unlikely to be unreasonably  withheld or delayed, the
necessity  of  acquiring  the  approval  could  limit the  number  of  potential
purchasers for those shares and otherwise limit the trust fund's ability to sell
and realize the value of those shares.

     The market value of any single  family  property may have declined in value
since the date of  origination  of the  mortgage  loan.  The market value of any
commercial  property,  multifamily  property or Mixed-Use  Property  obtained in
foreclosure or by deed in lieu of foreclosure will be based substantially on the
operating income obtained from renting the commercial or dwelling units. Since a
default on a mortgage loan secured by commercial property,  multifamily property
or Mixed-Use  Property is likely to have occurred because operating income,  net
of  expenses,  is  insufficient  to make debt  service  payments  on the related
mortgage loan, it can be anticipated that the market value of that property will
be less than was anticipated when the related  mortgage loan was originated.  To
the extent that



                                       41
<PAGE>

the equity in the property does not absorb the loss in market value and the loss
is not covered by other credit support, a loss may be experienced by the related
trust fund.

     With respect to multifamily  property  consisting of an apartment  building
owned  by  a  Cooperative,  the  Cooperative's  ability  to  meet  debt  service
obligations on the mortgage loan, as well as all other operating expenses,  will
be  dependent  in large part on the  receipt of  maintenance  payments  from the
tenant-stockholders, as well as any rental income from units or commercial areas
the Cooperative might control. Unanticipated expenditures may in some cases have
to be paid by special assessments of the tenant-stockholders.  The Cooperative's
ability to pay the principal  amount of the mortgage loan at maturity may depend
on its ability to refinance the mortgage loan. The depositor,  any  unaffiliated
seller and the servicer will have no obligation to provide  refinancing  for any
such mortgage loan.

     The servicer or subservicer will treat a defaulted  mortgage loan as having
been finally liquidated after all Liquidation  Proceeds,  Insurance Proceeds and
other amounts that the servicer or subservicer  expects to receive in connection
with the liquidation have been received.  Any Realized Loss will be allocated to
the certificates in the manner set forth in the related  prospectus  supplement.
Generally,  amounts  received  after a Realized  Loss has been  allocated to the
certificates  will not be distributed  to the  certificateholders,  however,  if
stated in the related prospectus  supplement,  amounts received after a Realized
Loss  has  been  allocated  to  the  certificates  may  be  distributed  to  the
certificateholders.

Enforcement of "Due-on-Sale" Clauses; Realization Upon Defaulted Contracts

     Each  pooling  and  servicing   agreement  with  respect  to   certificates
representing   interests  in  a  contract  pool  will  provide  that,  when  any
manufactured  home  securing a contract  is about to be  conveyed by the related
obligor,  the  servicer,  to the  extent  it has  knowledge  of the  prospective
conveyance  and prior to the time of the  consummation  of the  conveyance,  may
exercise  its rights to  accelerate  the  maturity  of that  contract  under the
applicable  "due-on-sale"  clause,  if any, unless it is not  exercisable  under
applicable  law. In that case,  the servicer is authorized to take or enter into
an assumption agreement from or with the person to whom the related manufactured
home has been or is about to be conveyed,  pursuant to which that person becomes
liable under the contract and, unless determined to be materially adverse to the
interests  of  certificateholders,  with the prior  approval of the related pool
insurer,  if any, to enter into a substitution of liability  agreement with that
person,  pursuant to which the original  obligor is released from  liability and
that person is  substituted  as obligor and becomes  liable under the  contract.
Where authorized by the contract,  the annual  percentage rate may be increased,
upon assumption, to the then-prevailing market rate, but shall not be decreased.

     Under  pooling and  servicing  agreement,  the servicer  will  repossess or
otherwise  comparably convert the ownership of properties  securing those of the
related  manufactured homes as come into and continue in default and as to which
no satisfactory  arrangements can be made for collection of delinquent payments.
In  connection  with the  repossession  or other  conversion,  the  servicer  or
subservicer  will  follow  whatever  practices  and  procedures  it  shall  deem
necessary or advisable and as shall be normal and usual in its general  contract
servicing activities. The servicer or subservicer, however, will not be required
to expend its own funds in  connection  with any  repossession  or  towards  the
restoration of any property unless it determines:

o    that  the  restoration  or  repossession  will  increase  the  proceeds  of
     liquidation  of  the  related  contract  to  the  certificateholders  after
     reimbursement to itself for the expenses; and

o    that the expenses  will be  recoverable  to it either  through  liquidation
     proceeds or through insurance proceeds.

Servicing Compensation and Payment of Expenses

     Under the pooling and servicing agreement for a series of certificates, the
depositor or the person or entity specified in the related prospectus supplement
and any  servicer  will be  entitled  to  receive  an amount  described  in that
prospectus  supplement.  The servicer's primary  compensation  generally will be
equal to a monthly  servicing  fee in the amount  specified  in the  pooling and
servicing agreement.  Servicing compensation shall be payable by withdrawal from
the related Servicing  Account prior to deposit in the Certificate  Account from
interest payments on


                                       42
<PAGE>


the mortgage loans or contracts,  Insurance  Proceeds,  Liquidation  Proceeds or
letter of credit payments, as applicable.  Additional servicing  compensation in
the form of  prepayment  charges,  assumption  fees,  late  payment  charges  or
otherwise shall be retained by the  subservicers  and the servicer to the extent
not  required  to be  deposited  in the  Certificate  Account.  If the  servicer
subcontracts  the servicing of specially  serviced  mortgage  loans to a special
servicer,  the amount and calculation of the fee payable to the special servicer
will be set forth in the related prospectus  supplement.  Subservicers will also
be  entitled to receive  servicing  compensation  in  addition to the  servicing
compensation to the extent described in the prospectus supplement.

     The  subservicers,  any special  servicer and the servicer will pay certain
expenses  incurred in  connection  with the  servicing of the mortgage  loans or
contracts,  including,  without  limitation,  payment  of the  insurance  policy
premiums and, in the case of the servicer, fees or other amounts payable for any
Alternative  Credit  Support,  payment  of the  fees  and  disbursements  of the
trustee, and any custodian selected by the trustee, the certificate register for
the related series and independent  accountants and payment of expenses incurred
in enforcing the obligations of servicers and sellers. Certain of these expenses
may be  reimbursable  pursuant to the terms of the related pooling and servicing
agreement.  In  addition,  the  servicer  will be entitled to  reimbursement  of
expenses  incurred  in  enforcing  the  obligations  of any  special  servicers,
subservicers and any sellers under certain circumstances.

     As set  forth in the  preceding  section,  the  subservicers,  any  special
servicer and the servicer will be entitled to reimbursement for certain expenses
incurred by them in connection with the liquidation of defaulted  mortgage loans
or  contracts.  The  related  trust fund will  suffer no loss by reason of those
expenses  to the  extent  claims are fully  paid  under the  financial  guaranty
insurance policy, surety bond or letter of credit, if any, the related insurance
policies,  from amounts in the reserve fund or under any applicable  Alternative
Credit Support described in a prospectus supplement. In the event, however, that
claims are either not made or fully paid under a  financial  guaranty  insurance
policy, surety bond, letter of credit,  insurance policies or Alternative Credit
Support, or if coverage thereunder has ceased, or if amounts in the reserve fund
are not sufficient to fully pay the losses, the related trust fund will suffer a
loss to the extent that the Liquidation  Proceeds,  after  reimbursement  of the
expenses of the subservicers or the servicer,  as the case may be, are less than
the principal balance of the related mortgage loan or contract. In addition, the
subservicers,   a  special  servicer  and  the  servicer  will  be  entitled  to
reimbursement   of  expenditures   incurred  by  them  in  connection  with  the
restoration of a mortgaged property,  Cooperative Dwelling or manufactured home.
The right of reimbursement will be prior to the rights of the certificateholders
to receive any payments under the financial  guaranty  insurance policy,  surety
bond or  letter of  credit,  if any,  or from any  related  Insurance  Proceeds,
Liquidation Proceeds, amounts in the reserve fund or any proceeds of Alternative
Credit Support.

     Under  the  applicable  trust  agreement,  the  trustee  or  a  certificate
administrator  will be entitled to deduct,  from  distributions of interest with
respect to the  Mortgage  Certificates,  a  specified  percentage  of the unpaid
principal balance of each Mortgage  Certificate as servicing  compensation.  The
trustee or  certificate  administrator  shall be required  to pay all  expenses,
except as expressly provided in the related trust agreement,  subject to limited
reimbursement as provided in the related trust agreement.

Evidence as to Compliance

     The servicer will deliver to the  depositor  and the trustee,  on or before
the  date  specified  in the  pooling  and  servicing  agreement,  an  officer's
certificate stating that:

o          a review  of the  activities  of the  servicer  and the  subservicers
           during the preceding calendar year and of their performance under the
           related  pooling  and  servicing  agreement  has been made  under the
           supervision of that officer; and

o          to the best of that  officer's  knowledge,  based on the review,  the
           servicer and each subservicer has fulfilled all its obligations under
           the related pooling and servicing agreement and the minimum servicing
           standards  set forth in the Uniform  Single  Attestation  Program for
           Mortgage Bankers,  or, if there has been a default in the fulfillment
           of any obligation,  specifying each default known to that officer and
           the nature and status thereof.

                                       43
<PAGE>

The  officer's  certificate  shall be  accompanied  by a statement  of a firm of
independent  public  accountants  to  the  effect  that,  on  the  basis  of  an
examination  of certain  documents  and  records  relating to  servicing  of the
mortgage  loans or contracts,  the servicing of the mortgage  loans or contracts
was  conducted in  compliance  with the  provisions of the pooling and servicing
agreement,  and the minimum servicing  standards set forth in the Uniform Single
Attestation Program for Mortgage Bankers,  except for the exceptions as the firm
of independent public accountants believes it is required to report.

Certain Matters Regarding the Servicer, the Depositor, the Trustee and the
Special Servicer

     The servicer  under each pooling and servicing  agreement  will be named in
the  applicable  prospectus  supplement.  The entity acting as servicer may be a
seller   unaffiliated   with  the  depositor  and  have  other  normal  business
relationships with the depositor and/or affiliates of the depositor or may be an
affiliate of the  depositor.  In the event there is no servicer  under a pooling
and servicing  agreement,  all servicing of mortgage  loans or contracts will be
performed by a servicer  pursuant to a servicing  agreement,  which will provide
for servicing responsibilities similar to those described in this prospectus for
a servicer acting pursuant to a pooling and servicing agreement.

     The  servicer  may not resign  from its  obligations  and duties  under the
pooling and servicing  agreement  except in connection with an assignment of its
obligations and duties permitted by the pooling and servicing  agreement or upon
a  determination  that its duties  thereunder  are no longer  permissible  under
applicable  law. No  resignation  will become  effective  until the trustee or a
successor  servicer has assumed the servicer's  obligations and duties under the
pooling and servicing agreement.

     The trustee under each pooling and servicing  agreement or trust  agreement
will be named in the applicable  prospectus  supplement.  The commercial bank or
trust company serving as trustee may have normal banking  relationships with the
depositor and/or its affiliates and with the servicer and/or its affiliates.

     The trustee may resign from its  obligations  under the related pooling and
servicing  agreement or trust  agreement at any time, in which event a successor
trustee will be appointed.  In addition, the depositor may remove the trustee if
the trustee  ceases to be eligible to act as trustee  under the related  pooling
and servicing  agreement or trust agreement or if the trustee becomes insolvent,
at which  time the  depositor  will  become  obligated  to  appoint a  successor
trustee.  The  trustee  may  also  be  removed  at any  time by the  holders  of
certificates  evidencing  voting  rights  aggregating  not less  than 50% of the
voting rights evidenced by the certificates of that series.  Any resignation and
removal of the trustee,  and the  appointment of a successor  trustee,  will not
become effective until acceptance of the appointment by the successor trustee.

     Each pooling and servicing  agreement and trust agreement will also provide
that neither the depositor nor the servicer nor any director,  officer, employee
or agent of the  depositor or the servicer or the  trustee,  or any  responsible
officers of the trustee will be under any  liability to the  certificateholders,
for the taking of any action or for refraining  from the taking of any action in
good faith  pursuant to the pooling and  servicing  agreement,  or for errors in
judgment;  provided,  however,  that none of the depositor,  the servicer or the
trustee nor any  director,  officer,  employee or agent of the  depositor or the
servicer or the  trustee,  or any  responsible  officers of the trustee  will be
protected against, in the case of the servicer and the depositor,  any breach of
representations or warranties made by them, and in the case of the servicer, the
depositor and the trustee, against any liability that would otherwise be imposed
by reason of willful misfeasance,  bad faith or negligence in the performance of
its duties or by reason of  reckless  disregard  of its  obligations  and duties
thereunder.

     Each  pooling and  servicing  agreement  and trust  agreement  will further
provide  that the  depositor,  the  servicer  and the trustee and any  director,
officer and  employee  or agent of the  depositor,  the  servicer or the trustee
shall be  entitled  to  indemnification,  by the  trust  fund in the case of the
depositor and servicer and by the servicer in the case of the trustee,  and will
be held harmless  against any loss,  liability or expense incurred in connection
with any legal action  relating to the applicable  related pooling and servicing
agreement or the  certificates,  and in the case of the trustee,  resulting from
any error in any tax or information  return prepared by the servicer or from the
exercise of any power of attorney  granted pursuant to the pooling and servicing
agreement,  other than any loss,  liability  or expense  related to any specific
mortgage loan, contract or Mortgage  Certificate,  except any loss, liability or
expense otherwise  reimbursable  pursuant to the applicable  related pooling and
servicing  agreement,  and any loss,  liability or expense incurred by reason of
willful  misfeasance,  bad  faith or gross  negligence  (or,  in the case of the
trustee,


                                       44
<PAGE>

negligence),  in the  performance  of their  duties  thereunder  or by reason of
reckless disregard of their obligations and duties thereunder. In addition, each
related pooling and servicing  agreement will provide that neither the depositor
nor the servicer, as the case may be, will be under any obligation to appear in,
prosecute or defend any legal action that is not  incidental to its duties under
the related pooling and servicing  agreement and that in its opinion may involve
it in any expense or liability.  The depositor or the servicer may, however,  in
their  discretion,  undertake any action  deemed by them  necessary or desirable
with respect to the applicable  related pooling and servicing  agreement and the
rights  and  duties  of  the   parties   thereto  and  the   interests   of  the
certificateholders thereunder. In that event, the legal expenses and costs of an
action  and any  liability  resulting  therefrom  will be  expenses,  costs  and
liabilities of the related trust fund, and the servicer or the depositor, as the
case may be, will be entitled to be reimbursed  therefor out of the  Certificate
Account.

     If the servicer  subcontracts the servicing of specially  serviced mortgage
loans to a special servicer,  the standard of care for, and any  indemnification
to be  provided  to,  the  special  servicer  will be set  forth in the  related
prospectus supplement or pooling and servicing agreement.

Events of Default

     Events of default under each pooling and servicing agreement will include:

o    any failure to make a specified payment which continues unremedied, in most
     cases, for five business days after the giving of written notice;

o    any failure by the trustee, the subservicer or the servicer, as applicable,
     duly to  observe  or  perform  in any  material  respect  any  other of its
     covenants  or  agreements  in the pooling  and  servicing  agreement  which
     failure shall continue for 60 days, 15 days in the case of a failure to pay
     the premium for any insurance policy,  or any breach of any  representation
     and warranty made by the servicer or the subservicer, if applicable,  which
     continues unremedied for 120 days after the giving of written notice of the
     failure or breach; and

o    certain events of insolvency,  readjustment of debt,  marshalling of assets
     and  liabilities  or  similar  proceedings  regarding  the  servicer  or  a
     subservicer, as applicable.

Rights Upon Event of Default

     So long as an Event of Default  with  respect  to a series of  certificates
remains  unremedied,  the depositor,  the trustee or the holders of certificates
evidencing  not less than the  percentage of the voting rights  evidenced by the
certificates  of that  series  specified  in the related  pooling and  servicing
agreement may terminate all of the rights and  obligations of the servicer under
the  pooling  and  servicing  agreement  and in and to the  mortgage  loans  and
contracts  and the  proceeds  thereof,  whereupon,  subject  to  applicable  law
regarding  the  trustee's  ability  to make  advances,  the  trustee  or, if the
depositor  so notifies  the  trustee  and the  servicer,  the  depositor  or its
designee,  will succeed to all the  responsibilities,  duties and liabilities of
the  servicer  under the related  pooling and  servicing  agreement  and will be
entitled  to similar  compensation  arrangements.  In the event that the trustee
would be obligated to succeed the servicer but is unwilling or unable so to act,
it may  appoint,  or  petition  to a court  of  competent  jurisdiction  for the
appointment  of, a successor  servicer.  Pending an  appointment,  the  trustee,
unless  prohibited  by law from so  acting,  shall be  obligated  to act in that
capacity.  The trustee and the  successor  servicer may agree upon the servicing
compensation  to be paid to the  successor  servicer,  which in no event  may be
greater  than the  compensation  to the servicer  under the related  pooling and
servicing agreement.

Amendment

     Each pooling and servicing  agreement may be amended by the depositor,  the
servicer and the trustee, without the consent of the certificateholders:

o    to cure any ambiguity;

o    to correct or  supplement  any  provision  in that  pooling  and  servicing
     agreement that may be inconsistent with any other provision in that pooling
     and servicing agreement; or

                                       45
<PAGE>

o    to make any other  provisions with respect to matters or questions  arising
     under the related pooling and servicing agreement that are not inconsistent
     with the  provisions  thereof,  provided that the action will not adversely
     affect in any material  respect the interests of any  certificateholder  of
     the related series.

     The related  pooling  and  servicing  agreement  may also be amended by the
depositor,  the  servicer  and the  trustee  with  the  consent  of  holders  of
certificates  evidencing not less than 66 2/3% of the voting rights evidenced by
the certificates, for the purpose of adding any provisions to or changing in any
manner or  eliminating  any of the  provisions  of that  pooling  and  servicing
agreement or of  modifying  in any manner the rights of the  certificateholders;
provided, however, that no amendment may:

(1)  reduce in any  manner  the  amount  of,  delay the  timing of or change the
     manner in which payments  received on or with respect to mortgage loans and
     contracts are required to be  distributed  with respect to any  certificate
     without the consent of the holder of that certificate;

(2)  adversely  affect in any material respect the interests of the holders of a
     class or  subclass  of the senior  certificates,  if any,  of a series in a
     manner  other than that set forth in (1) above  without  the consent of the
     holders of the senior certificates of that class or subclass evidencing not
     less than 66 2/3% of that class or subclass;

(3)  adversely  affect in any material  respect the  interests of the holders of
     the subordinated  certificates,  if any, of a series in a manner other than
     that  set  forth  in (1)  above  without  the  consent  of the  holders  of
     subordinated certificates evidencing not less than 66 2/3% of that class or
     subclass; or

(4)  reduce the aforesaid  percentage of the certificates,  the holders of which
     are  required  to  consent to the  amendment,  without  the  consent of the
     holders of the class affected thereby.

Termination

     The obligations created by the pooling and servicing agreement for a series
of certificates will terminate upon the earlier of:

      (1)  the  repurchase of all mortgage  loans or contracts and all property
           acquired by foreclosure of any mortgage loan or contract; and

      (2)  the later of:

o    the maturity or other  liquidation  of the last  mortgage  loan or contract
     subject  thereto  and  the  disposition  of  all  property   acquired  upon
     foreclosure of any mortgage loan or contract; and

o    the payment to the  certificateholders  of all amounts held by the servicer
     and  required  to be paid to  them  pursuant  to the  related  pooling  and
     servicing agreement.

     The obligations  created by the related pooling and servicing  agreement or
trust  agreement  for  a  series  of   certificates   will  terminate  upon  the
distribution to  certificateholders of all amounts required to be distributed to
them pursuant to that pooling and servicing agreement or trust agreement.  In no
event,  however,  will the trust  created  by either  the  related  pooling  and
servicing   agreement  or  the  related  trust  agreement  continue  beyond  the
expiration  of 21 years from the death of the last  survivor of certain  persons
identified in the related  pooling and servicing  agreement or the related trust
agreement.

     For each series of  certificates,  the servicer will give written notice of
termination of the applicable  related pooling and servicing  agreement or trust
agreement of each  certificateholder,  and the final  distribution  will be made
only upon surrender and  cancellation of the certificates at an office or agency
specified in the notice of  termination.  After  termination  of the  applicable
related pooling and servicing  agreement or trust  agreement,  the  certificates
will no longer  accrue  interest,  and the only  obligation  of the  trust  fund
thereafter  will be to pay principal and accrued  interest that was available to
be paid on the date of termination,  upon surrender of the related certificates.
The  trust  fund  and the  certificateholders  will  have no  obligation  to the
purchaser of the assets of the related  trust fund with respect to the assets so
purchased.

                                       46
<PAGE>

     If stated in the related prospectus  supplement,  the pooling and servicing
agreement  for each series of  certificates  will permit,  but not require,  the
depositor or some other person as stated in the related prospectus supplement to
repurchase  from the trust fund for that series all remaining  mortgage loans or
contracts subject to the pooling and servicing agreement at a price specified in
that prospectus supplement. If stated in the related prospectus supplement,  the
repurchase price will be equal to:

      (1)  the aggregate  principal  balance of the mortgage loans  outstanding,
           including  mortgage  loans  that  have  been  foreclosed  upon if the
           Liquidation Proceeds have not yet been distributed,  plus accrued and
           unpaid interest thereon; or

      (2)  the aggregate outstanding principal balance of and accrued and unpaid
           interest  on the  mortgage  loans  outstanding,  plus the fair market
           value  of  any  mortgaged   property   acquired  in   foreclosure  or
           deed-in-lieu of foreclosure if the Liquidation Proceeds in respect of
           that property have not yet been received by or on behalf of the trust
           fund.

The  purchase  price  described  in clause (2) above could result in one or more
classes of  certificates  receiving  less than their  outstanding  principal and
accrued  interest  if the fair  market  value of the  property  is less than the
outstanding principal and accrued interest on the related mortgage loan.

     In the event that the depositor elects to treat the related trust fund as a
REMIC under the Code,  any  repurchase  will be effected in compliance  with the
requirements  of  Section  860F(a)(4)  of the  Code,  in order to  constitute  a
"qualifying liquidation" under the Code. The exercise of any right to repurchase
will effect early retirement of the  certificates of that series,  but the right
so to  repurchase  may be  effected  only on or after  the  aggregate  principal
balance  of the  mortgage  loans or  contracts  for that  series  at the time of
repurchase  is less than a specified  percentage,  not greater  than 10%, of the
aggregate  principal  balance at the Cut-off Date for the series, or on or after
the date set forth in the related prospectus supplement.

                                 Credit Support

     Credit support for a series of certificates  may be provided by one or more
financial  guaranty insurance  policies,  surety bonds or letters of credit, the
issuance of subordinated  classes or subclasses of  certificates,  which may, if
stated in the related prospectus supplement,  be issued in notional amounts, the
provision for shifting  interest  credit  enhancement,  the  establishment  of a
reserve  fund,  the  method  of  Alternative  Credit  Support  specified  in the
applicable  prospectus  supplement,  or any  combination  of the  foregoing,  in
addition  to,  or in lieu  of,  the  insurance  arrangements  set  forth in this
prospectus  under  "Description  of Insurance."  The amount and method of credit
support will be set forth in the prospectus  supplement with respect to a series
of certificates.

Financial Guaranty Insurance Policies; Surety Bonds

     The depositor may obtain one or more financial  guaranty insurance policies
or surety bonds  issued by insurers or other  parties  acceptable  to the rating
agency or agencies rating the securities of a series.  Any such policy or surety
bond  may  provide  payments  to the  holders  of only  one or more  classes  of
securities of a series, as specified in the applicable prospectus supplement.

     Unless  specified  in  the  prospectus  supplement,  a  financial  guaranty
insurance policy or surety bond will be  unconditional  and irrevocable and will
guarantee to holders of the  applicable  securities  that an amount equal to the
full amount of payments due to these  holders will be received by the trustee or
its agent on  behalf of the  holders  for  payment  on each  payment  date.  The
specific terms of any financial guaranty insurance policy or surety bond will be
described  in the  accompanying  prospectus  supplement.  A  financial  guaranty
insurance policy or surety bond may have  limitations  and, in most cases,  will
not  insure the  obligation  of the  sellers or the  depositor  to  purchase  or
substitute for a defective  trust asset and will not guarantee any specific rate
of principal  prepayments or cover specific interest shortfalls.  In most cases,
the insurer  will be  subrogated  to the rights of each holder to the extent the
insurer makes payments under the financial guaranty insurance policy.


                                       47
<PAGE>


Letters of Credit

     The letters of credit,  if any,  with  respect to a series of  certificates
will be issued by the bank or  financial  institution  specified  in the related
prospectus supplement. The maximum obligation of the letter of credit bank under
the  related  letter of  credit  will be to honor  requests  for  payment  in an
aggregate  fixed dollar amount,  net of  unreimbursed  payments  previously made
under the letter of credit,  equal to the percentage of the aggregate  principal
balance on the related Cut-off Date of the mortgage loans or contracts evidenced
by each series  specified in the  prospectus  supplement  for that  series.  The
duration of coverage and the amount and  frequency of any  reduction in coverage
provided by the letter of credit with respect to a series of  certificates  will
be in compliance with the requirements  established by the related Rating Agency
and will be set forth in the  prospectus  supplement  relating to that series of
certificates. The amount available under the letter of credit in all cases shall
be reduced to the extent of the unreimbursed  payments previously made under the
letter of credit.  The obligations of the letter of credit bank under the letter
of credit for each series of  certificates  will expire 30 days after the latest
of the scheduled  final maturity dates of the mortgage loans or contracts in the
related  mortgage pool or contract pool or the  repurchase of all mortgage loans
or contracts in the mortgage pool or contract pool, or on another date specified
in the related prospectus supplement.

     If stated  in the  applicable  prospectus  supplement,  under  the  related
pooling and  servicing  agreement,  the servicer will be required not later than
three  business  days prior to each  distribution  date to  determine  whether a
payment  under the letter of credit will be necessary on the  distribution  date
and will, no later than the third business day prior to that distribution  date,
advise the letter of credit bank and the trustee of its  determination,  stating
the amount of any required  payment.  On the  distribution  date,  the letter of
credit bank will be required  to honor the  trustee's  request for payment in an
amount equal to the lesser of:

o    the remaining amount available under the letter of credit; and

o    the outstanding  principal balances of any Liquidating Loans to be assigned
     on that  distribution  date,  together  with  accrued  and unpaid  interest
     thereon  at the  related  mortgage  rate or annual  percentage  rate to the
     related due date.

The proceeds of payments  under the letter of credit will be deposited  into the
Certificate Account and will be distributed to certificateholders, in the manner
specified  in the related  prospectus  supplement,  on that  distribution  date,
except to the extent of any unreimbursed Advances, servicing compensation due to
the  subservicers and the servicer and other amounts payable to the depositor or
the person or entity named in the applicable prospectus supplement.

     If at any time the  letter of credit  bank makes a payment in the amount of
the full  outstanding  principal  balance and accrued  interest on a Liquidating
Loan,  it will be  entitled  to receive  an  assignment  by the  trustee of that
Liquidating  Loan,  and the  letter  of  credit  bank  will  thereafter  own the
Liquidating  Loan  free  of  any  further  obligation  to  the  trustee  or  the
certificateholders  with respect to that loan.  Payments made to the Certificate
Account by the letter of credit bank under the letter of credit with  respect to
a Liquidating Loan will be reimbursed to the letter of credit bank only from the
proceeds,  net of  liquidation  costs,  of that  Liquidating  Loan.  The  amount
available  under the  letter of credit  will be  increased  to the  extent it is
reimbursed for those payments.

     To the extent the proceeds of liquidation of a Liquidating Loan acquired by
a letter of credit  bank in the  manner  described  in the  preceding  paragraph
exceed the amount of payments  made with respect  thereto,  the letter of credit
bank will be entitled  to retain the  proceeds as  additional  compensation  for
issuance of the letter of credit.

     Prospective  purchasers of  certificates  of a series with respect to which
credit  support is provided by a letter of credit must look to the credit of the
letter of credit  bank,  to the  extent of its  obligations  under the letter of
credit,  in the event of  default  by  mortgagors  or  obligors.  If the  amount
available under the letter of credit is exhausted,  or the letter of credit bank
becomes insolvent, and amounts in the reserve fund, if any, with respect to that
series  are  insufficient  to pay the  entire  amount  of the loss and  still be
maintained  at the level  specified in the related  prospectus  supplement,  the
certificateholders,   in  the  priority  specified  in  the  related  prospectus
supplement,  will  thereafter  bear all risks of loss  resulting from default by
mortgagors or obligors, including losses not covered by insurance or


                                       48
<PAGE>

     Alternative  Credit  Support,  and must look  primarily to the value of the
properties  securing  defaulted  mortgage loans or contracts for recovery of the
outstanding principal and unpaid interest.

Subordinated Certificates

     To the extent of the  Subordinated  Amount as specified  in the  applicable
prospectus  supplement,  credit support may be provided by the  subordination of
the rights of the holders of one or more classes or subclasses  of  certificates
to receive distributions with respect to the mortgage loans in the mortgage pool
or contracts  in the  contract  pool  underlying  that series,  to the rights of
senior  certificateholders  or holders of one or more classes or  subclasses  of
subordinated  certificates  of that series to receive  distributions.  In such a
case,  credit  support may also be provided  by the  establishment  of a reserve
fund, as described in "--Reserve Fund." The Subordinated  Amount will be reduced
by an amount equal to the aggregate amount of Realized Losses that have occurred
in the  mortgage  pool or contract  pool.  If stated in the  related  prospectus
supplement,  the Subordinated Amount will decline over time in accordance with a
schedule which will also be set forth in the related prospectus supplement.

Shifting Interest

     If stated in the  prospectus  supplement for a series of  certificates  for
which credit  enhancement is provided by shifting  interest as described in this
section,  the rights of the holders of subordinated  certificates of that series
to receive  distributions with respect to the mortgage loans or contracts in the
related  trust fund will be  subordinated  to the right of the holders of senior
certificates of that series to receive  distributions to the extent described in
that prospectus  supplement.  This subordination  feature is intended to enhance
the likelihood of regular receipt by holders of senior  certificates of the full
amount of scheduled  monthly  payments of principal and interest due them and to
provide limited protection to the holders of senior certificates  against losses
due to mortgagor defaults.

     The protection  afforded to the holders of senior  certificates of a series
by the shifting interest  subordination feature will be effected by distributing
to the holders of senior certificates a disproportionately greater percentage of
prepayments of principal on the related  mortgage  loans,  contracts or mortgage
loans underlying the related Mortgage  Certificates.  The initial  percentage of
principal  to be  received by the senior  certificates  for a series will be the
percentage  specified in the related prospectus  supplement and will decrease in
accordance  with the  schedule  and  subject  to the  conditions  stated in that
prospectus  supplement.  This  disproportionate  distribution  of prepayments of
principal on the related mortgage loans,  contracts or mortgage loans underlying
the  related  Mortgage  Certificates  will have the effect of  accelerating  the
amortization of the senior certificates while increasing the respective interest
of the  subordinated  certificates  in  the  mortgage  pool  or  contract  pool.
Increasing the respective interest of the subordinated  certificates relative to
that of the senior  certificates is intended to preserve the availability of the
benefits of the subordination provided by the subordinated certificates.

Overcollateralization

     If stated in the applicable prospectus supplement,  interest collections on
the mortgage loans or contracts may exceed  interest  payments on the securities
for the related distribution date. To the extent such excess interest is applied
as  principal  payments  on the  securities,  the  effect  will be to reduce the
principal balance of the securities  relative to the outstanding  balance of the
mortgage loan or contract, thereby creating overcollateralization and additional
protection  to  the  securityholders,  if and to  the  extent  specified  in the
accompanying prospectus supplement.

Swaps and Yield Supplement Agreements

     The trustee on behalf of the trust may enter into  interest  rate swaps and
related caps, floors and collars to minimize the risk to  certificateholders  of
adverse  changes in interest  rates,  and other yield  supplement  agreements or
similar yield  maintenance  arrangements  that do not involve swap agreements or
other notional principal contracts.

     An  interest  rate swap is an  agreement  between two parties to exchange a
stream of interest  payments on an agreed  hypothetical or "notional"  principal
amount.  No  principal  amount is  exchanged  between the  counterparties  to an
interest rate swap. In the typical swap, one party agrees to pay a fixed rate on
a notional principal amount,

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<PAGE>

while the  counterparty  pays a  floating  rate  based on one or more  reference
interest  rates  including  the  London  Interbank  Offered  Rate or,  LIBOR,  a
specified  bank's prime rate or U.S.  Treasury  Bill rates.  Interest rate swaps
also permit  counterparties  to exchange a floating rate obligation based on one
reference  interest rate (such as LIBOR) for a floating rate obligation based on
another referenced interest rate (such as U.S. Treasury Bill rates).

     The swap market has grown  substantially in recent years with a significant
number of banks and financial  service  firms acting both as  principals  and as
agents utilizing  standardized swap documentation.  Caps, floors and collars are
more recent innovations, and they are less liquid than other swaps.

     Yield supplement  agreements may be entered into to supplement the interest
rate or rates on one or more classes of the securities of any series.

     There  can be no  assurance  that the trust  will be able to enter  into or
offset swaps or enter into yield  supplement  agreements at any specific time or
at prices or on other terms that are  advantageous.  In  addition,  although the
terms of the swaps and yield  supplement  agreements may provide for termination
under some circumstances,  there can be no assurance that the trust will be able
to terminate a swap or yield supplement  agreement when it would be economically
advantageous to the trust to do so.

Purchase Obligations

     Some of the mortgage loans or contracts and classes of  certificates of any
series, as specified in the related prospectus  supplement,  may be subject to a
purchase  obligation.  The terms and  conditions  of each  purchase  obligation,
including the purchase price, timing and payment procedure, will be described in
the  related  prospectus  supplement.  A  purchase  obligation  with  respect to
mortgage loans or contracts may apply to the related mortgage loans or contracts
or to the related  certificates.  Each purchase  obligation  may be a secured or
unsecured  obligation  of its  provider,  which  may  include  a bank  or  other
financial  institution or an insurance company. Each purchase obligation will be
evidenced  by an  instrument  delivered  to the  trustee  for the benefit of the
applicable  certificateholders  of the related series.  Each purchase obligation
with  respect to  mortgage  loans or  contracts  will be  payable  solely to the
trustee for the benefit of the  certificateholders  of the related series, or if
stated  in the  related  prospectus  supplement,  to some  other  person.  Other
purchase obligations may be payable to the trustee or directly to the holders of
the certificates to which the obligations relate.

Reserve Fund

     If stated in the related prospectus supplement, credit support with respect
to a series of certificates may be provided by the establishment and maintenance
with the trustee,  in trust, of a reserve fund for that series.  Generally,  the
reserve  fund  for a series  will not be  included  in the  trust  fund for that
series,  however if stated in the related prospectus supplement the reserve fund
for a series may be included in the trust fund for that series. The reserve fund
for each series will be created by the depositor and shall be funded by:

o    the retention by the servicer of certain  payments on the mortgage loans or
     contracts;

o    the deposit with the trustee, in escrow, by the depositor of a subordinated
     pool of mortgage loans or manufactured  housing conditional sales contracts
     and installment loan agreements with the aggregate principal balance, as of
     the related Cut-off Date, set forth in the related prospectus supplement;

o    an Initial Deposit;

o    any combination of the foregoing; or

o    some other manner as specified in the related prospectus supplement.

     Following the initial issuance of the certificates of a series and until
the balance of the reserve fund first  equals or exceeds the  Required  Reserve,
the  servicer  will retain  specified  distributions  on the  mortgage  loans or
contracts,  and/or on the mortgage  loans or contracts in a  subordinated  pool,
otherwise distributable to the holders of subordinated  certificates and deposit
those amounts in the reserve  fund.  After the amounts in the reserve fund for a
series first equal or exceed the applicable Required Reserve,  the servicer will
retain such  distributions  and deposit so

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<PAGE>

much of  those  amounts  in the  reserve  fund as may be  necessary,  after  the
application of distributions to amounts due and unpaid on the certificates or on
the  certificates  of that series to which the  applicable  class or subclass of
subordinated certificates are subordinated and the reimbursement of unreimbursed
Advances and liquidation  expenses, to maintain the reserve fund at the Required
Reserve. The balance in the reserve fund in excess of the Required Reserve shall
be paid to the applicable class or subclass of subordinated certificates,  or to
another  specified  person or  entity,  as set forth in the  related  prospectus
supplement,  and shall be  unavailable  thereafter  for future  distribution  to
certificateholders  of any class. The prospectus supplement for each series will
set forth the amount of the Required  Reserve  applicable from time to time. The
Required  Reserve may decline over time in accordance with a schedule which will
also be set forth in the related prospectus supplement.

     Amounts  held in the  reserve  fund for a  series  from  time to time  will
continue  to be the  property  of  the  subordinated  certificateholders  of the
classes or  subclasses  specified  in the related  prospectus  supplement  until
withdrawn from the reserve fund and  transferred to the  Certificate  Account as
described  below.  If on any  distribution  date the  amount in the  Certificate
Account  available to be applied to distributions on the senior  certificates of
that series, after giving effect to any Advances made by the subservicers or the
servicer on the related  distribution  date, is less than the amount required to
be distributed to the senior  certificateholders  on that distribution date, the
servicer will  withdraw  from the reserve fund and deposit into the  Certificate
Account the lesser of:

o    the entire amount on deposit in the reserve fund available for distribution
     to the senior certificateholders, which amount will not in any event exceed
     the Required Reserve; or

o    the amount  necessary  to  increase  the funds in the  Certificate  Account
     eligible  for  distribution  to  the  senior   certificateholders  on  that
     distribution  date to the amount  required to be  distributed to the senior
     certificateholders on that distribution date;

provided,  however,  that in no event  will any amount  representing  investment
earnings on amounts held in the reserve fund be transferred into the Certificate
Account  or  otherwise  used  in any  manner  for  the  benefit  of  the  senior
certificateholders.

     Generally,  whenever  amounts on deposit in the reserve  fund are less than
the Required Reserve, holders of the subordinated certificates of the applicable
class or  subclass  will not  receive  any  distributions  with  respect  to the
mortgage  loans or  contracts  other  than  amounts  attributable  to any income
resulting from investment of the reserve fund as described  below,  however,  if
stated  in the  related  prospectus  supplement,  holders  of  the  subordinated
certificates of the applicable class or subclass may receive  distributions with
respect  to the  mortgage  loans or  contracts  when  amounts  on deposit in the
reserve fund are less than the Required Reserve.  If specified in the applicable
prospectus  supplement,  whether or not amounts on deposit in the  reserve  fund
exceed  the  Required  Reserve  on any  distribution  date,  the  holders of the
subordinated  certificates  of the applicable  class or subclass are entitled to
receive from the Certificate Account their share of the proceeds of any mortgage
loan or contract,  or any property  acquired in respect thereof,  repurchased by
reason of defective  documentation or the breach of a representation or warranty
pursuant to the pooling and servicing agreement.

     If  specified  in the  applicable  prospectus  supplement,  amounts  in the
reserve fund shall be applied in the following order:

(1)  to the  reimbursement  of  Advances  determined  by the  servicer  and  the
     subservicers to be otherwise unrecoverable, other than Advances of interest
     in connection with prepayments in full,  repurchases and liquidations,  and
     the reimbursement of liquidation  expenses incurred by the subservicers and
     the  servicer  if  sufficient  funds for  reimbursement  are not  otherwise
     available in the related Servicing Accounts and Certificate Account;

(2)  to the payment to the holders of the senior  certificates of that series of
     amounts  distributable to them on the related  distribution date in respect
     of scheduled payments of principal and interest due on the related due date
     to the extent  that  sufficient  funds in the  Certificate  Account are not
     available therefor; and

(3)  to the payment to the holders of the senior  certificates of that series of
     the principal  balance or purchase price, as applicable,  of mortgage loans
     or contracts repurchased, liquidated or foreclosed during the period ending
     on the day prior to the due date to which  that  distribution  relates  and


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<PAGE>


     interest  thereon at the  related  Pass-Through  Rate,  to the extent  that
     sufficient funds in the Certificate Account are not available therefor.

     Amounts in the reserve  fund in excess of the Required  Reserve,  including
any investment income on amounts in the reserve fund, as set forth below,  shall
then be  released to the holders of the  subordinated  certificates,  or to some
other person as is specified in the  applicable  prospectus  supplement,  as set
forth above.

     Funds in the reserve fund for a series shall be invested as provided in the
related pooling and servicing agreement in Eligible Investments. The earnings on
those  investments  will be withdrawn and paid to the holders of the  applicable
class  or  subclass  of  subordinated  certificates  in  accordance  with  their
respective  interests  in the  reserve  fund in the  priority  specified  in the
related  prospectus  supplement.  Investment  income in the reserve  fund is not
available for  distribution  to the holders of the senior  certificates  of that
series or  otherwise  subject  to any  claims or  rights of the  holders  of the
applicable class or subclass of senior  certificates.  Eligible  Investments for
monies  deposited  in the  reserve  fund will be  specified  in the  pooling and
servicing  agreement  for a series of  certificates  for which a reserve fund is
established  and  generally  will be limited to  investments  acceptable  to the
related Rating Agency from time to time as being consistent with its outstanding
rating of the certificates. With respect to a reserve fund, Eligible Investments
will be limited,  however,  to obligations or securities  that mature at various
time  periods  according  to a schedule  in the related  pooling  and  servicing
agreement  based on the current  balance of the reserve  fund at the time of the
investment or the contractual commitment providing for the investment.

     The time  necessary  for the reserve fund of a series to reach and maintain
the applicable  Required  Reserve at any time after the initial  issuance of the
certificates of that series and the  availability of amounts in the reserve fund
for  distributions  on  the  related   certificates  will  be  affected  by  the
delinquency,  foreclosure  and  prepayment  experience of the mortgage  loans or
contracts  in the  related  trust  fund  and/or  in the  subordinated  pool  and
therefore cannot be accurately predicted.

Performance Bond

     If  stated  in the  related  prospectus  supplement,  the  servicer  may be
required to obtain a  performance  bond that would  provide a  guarantee  of the
performance by the servicer of one or more of its obligations  under the related
pooling and servicing agreement,  including its obligation to advance delinquent
installments  of principal  and interest on mortgage  loans or contracts and its
obligation to repurchase mortgage loans or contracts in the event of a breach by
the servicer of a  representation  or warranty  contained in the related pooling
and servicing agreement.  In the event that the outstanding credit rating of the
obligor of the  performance  bond is lowered by the related Rating Agency,  with
the result that the outstanding  rating on the certificates  would be reduced by
the related Rating Agency,  the servicer will be required to secure a substitute
performance  bond issued by an entity with a rating  sufficient  to maintain the
outstanding  rating on the  certificates  or to deposit  and  maintain  with the
trustee cash in the amount specified in the applicable prospectus supplement.

                            Description of Insurance

     To the extent that the applicable  prospectus supplement does not expressly
provide for a form of credit support  specified above or for Alternative  Credit
Support in lieu of some or all of the insurance  mentioned  below, the following
paragraphs on insurance  shall apply with respect to the mortgage loans included
in the related  trust fund.  To the extent  described in the related  prospectus
supplement,  each manufactured home that secures a contract will be covered by a
standard  hazard  insurance  policy and other insurance  policies.  Any material
changes in insurance from the description that follows or the description of any
Alternative  Credit  Support  will be set  forth  in the  applicable  prospectus
supplement.

Primary Mortgage Insurance Policies

     To the extent specified in the related prospectus supplement,  each pooling
and servicing agreement will require the subservicer to cause a primary mortgage
insurance  policy to be maintained in full force and effect with respect to each
mortgage  loan  that is  secured  by a  single  family  property  requiring  the
insurance  and to act on behalf  of the  related  insured  with  respect  to all
actions required to be taken by the insured under each primary mortgage

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<PAGE>

insurance  policy.  Generally,  a primary  mortgage  insurance policy covers the
amount of the  unpaid  principal  balance of the  mortgage  loan over 75% of the
value of the  mortgaged  property at  origination.  Primary  mortgage  insurance
policies are generally  permitted or required to be  terminated  when the unpaid
principal  balance  of the  mortgage  loan is reduced to 80% of the value of the
mortgaged  property at the time of  origination.  Any primary  credit  insurance
policies  relating to the contracts  underlying a series of certificates will be
described in the related prospectus supplement.

     The  amount of a claim for  benefits  under a  primary  mortgage  insurance
policy  covering a mortgage  loan in the related  mortgage pool  generally  will
consist of the  insured  portion of the unpaid  principal  amount of the covered
mortgage  loan and accrued and unpaid  interest  thereon  and  reimbursement  of
certain expenses, less:

o    all rents or other payments  collected or received by the related  insured,
     other than the  proceeds of hazard  insurance,  that are derived from or in
     any way related to the mortgaged property;

o    hazard  insurance  proceeds in excess of the amount required to restore the
     mortgaged  property  and which have not been  applied to the payment of the
     related mortgage loan;

o    amounts expended but not approved by the primary mortgage insurer;

o    claim payments previously made by the primary mortgage insurer; and

o    unpaid premiums.

     As  conditions  precedent  to the filing of or  payment of a claim  under a
primary  mortgage  insurance  policy  covering  a mortgage  loan in the  related
mortgage pool, the related  insured  generally will be required to, in the event
of default by the mortgagor:

      (1)  advance or discharge:

           (A)  all hazard insurance premiums; and

           (B)  as  necessary  and  approved in advance by the primary  mortgage
                insurer:

o    real estate property taxes;

o    all  expenses  required  to  preserve,  repair  and  prevent  waste  to the
     mortgaged  property so as to maintain the mortgaged property in at least as
     good a condition as existed at the effective date of such primary  mortgage
     insurance policy, ordinary wear and tear excepted;

o    property sales expenses;

o    any outstanding liens, as defined in the related primary mortgage insurance
     policy, on the mortgaged property; and

o    foreclosure costs, including court costs and reasonable attorneys' fees;

      (2)  in the event of a physical loss or damage to the mortgaged  property,
           have the mortgaged property restored and repaired to at least as good
           a condition as existed at the effective  date of the related  primary
           mortgage insurance policy, ordinary wear and tear excepted; and

      (3)  tender to the primary mortgage insurer good and merchantable title to
           and possession of the mortgaged property.

     Other provisions and conditions of each primary  mortgage  insurance policy
covering a mortgage  loan in the related  mortgage pool  generally  will provide
that:

      (1)  no change  may be made in the  terms of the  related  mortgage  loan
           without the consent of the primary mortgage insurer;

      (2)  written notice must be given to the primary  mortgage  insurer within
           10 days after the related  insured  becomes aware that a mortgagor is
           delinquent  in the  payment  of a sum equal to the  aggregate  of two
           scheduled  monthly  payments due under the related  mortgage  loan or
           that  any

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<PAGE>

          proceedings  affecting  the  mortgagor's  interest  in  the  mortgaged
          property securing the mortgage loan have commenced, and thereafter the
          insured must report monthly to the primary mortgage insurer the status
          of any mortgage loan until the mortgage loan is brought current, those
          proceedings are terminated or a claim is filed;

      (3)  the primary  mortgage  insurer  will have the right to  purchase  the
           related  mortgage loan, at any time subsequent to the 10 days' notice
           described in (2) above and prior to the  commencement  of foreclosure
           proceedings,  at a price equal to the unpaid  principal amount of the
           mortgage  loan,  plus accrued and unpaid  interest  and  reimbursable
           amounts expended by the related insured for the real estate taxes and
           fire and extended coverage  insurance on the mortgaged property for a
           period  not  exceeding  12  months,  and  less  the sum of any  claim
           previously paid under the primary  mortgage  insurance policy and any
           due and unpaid premiums with respect to that policy;

      (4)  the insured must commence  proceedings at certain times  specified in
           the  primary  mortgage  insurance  policy and  diligently  proceed to
           obtain good and merchantable title to and possession of the mortgaged
           property;

      (5)  the related insured must notify the primary  mortgage  insurer of the
           price  specified  in (3) above at least 15 days  prior to the sale of
           the mortgaged property by foreclosure, and bid that amount unless the
           primary mortgage insurer specifies a lower or higher amount; and

      (6)  the related insured may accept a conveyance of the mortgaged property
           in lieu of foreclosure  with written approval of the primary mortgage
           insurer  provided  the  ability of the  insured  to assign  specified
           rights to the primary  mortgage  insurer are not thereby  impaired or
           the specified  rights of the primary mortgage insurer are not thereby
           adversely affected.

     Any rents or other  payments  collected or received by the related  insured
which are derived from or are in any way related to the mortgaged  property will
be deducted from any claim payment.

FHA Insurance and VA Guarantees

     The  FHA  is  responsible  for  administering   various  federal  programs,
including  mortgage  insurance,  authorized  under the National  Housing Act, as
amended,  and the  United  States  Housing  Act of  1937,  as  amended.  Any FHA
insurance  or VA  guarantees  relating  to  contracts  underlying  a  series  of
certificates will be described in the related prospectus supplement.

     The insurance  premiums for FHA Loans are collected by HUD approved lenders
or by the  servicers of the FHA Loans and are paid to the FHA.  The  regulations
governing FHA single-family  mortgage  insurance programs provide that insurance
benefits  are  payable  either  upon   foreclosure,   or  other  acquisition  of
possession,  and conveyance of the mortgaged  premises to HUD or upon assignment
of the  defaulted  FHA Loan to HUD.  With respect to a defaulted  FHA Loan,  the
servicer of that FHA Loan will be limited in its ability to initiate foreclosure
proceedings.  When it is determined, either by the servicer or HUD, that default
was caused by circumstances beyond the mortgagor's control, the servicer will be
expected to make an effort to avoid foreclosure by entering,  if feasible,  into
one of a number of  available  forms of  forbearance  plans with the  mortgagor.
Forbearance plans may involve the reduction or suspension of scheduled  mortgage
payments  for a specified  period,  with  payments to be made upon or before the
maturity  date of the  mortgage,  or the  recasting  of  payments  due under the
mortgage  up to or beyond the  scheduled  maturity  date.  In  addition,  when a
default caused by circumstances beyond the mortgagor's control is accompanied by
certain  other  criteria,  HUD may  provide  relief  by making  payments  to the
servicer of the related mortgage loan in partial or full satisfaction of amounts
due  thereunder,  which payments are to be repaid by the mortgagor to HUD, or by
accepting  assignment  of the  mortgage  loan from the  servicer.  With  certain
exceptions,  at least  three full  monthly  installments  must be due and unpaid
under the mortgage  loan, and HUD must have rejected any request for relief from
the mortgagor before the servicer may initiate foreclosure proceedings.

     HUD has the option,  in most cases,  to pay insurance  claims in cash or in
debentures issued by HUD.  Presently,  claims are being paid in cash, and claims
have  not  been  paid  in  debentures  since  1965.  HUD  debentures  issued  in
satisfaction  of FHA  insurance  claims  bear  interest  at the  applicable  HUD
debenture  interest  rate. The servicer of each FHA Loan in a mortgage pool will
be obligated to purchase any debenture issued in satisfaction of a defaulted FHA
Loan serviced by it for an amount equal to the principal amount of the FHA Loan.

                                       54
<PAGE>

     The amount of insurance  benefits generally paid by the FHA is equal to the
entire unpaid principal balance of the defaulted FHA Loan, adjusted to reimburse
the  servicer  of that FHA Loan for  certain  costs and  expenses  and to deduct
certain  amounts  received or  retained  by the  servicer  after  default.  When
entitlement to insurance benefits results from foreclosure, or other acquisition
of possession, and conveyance to HUD, the related servicer is compensated for no
more than two-thirds of its foreclosure  costs,  and is compensated for interest
accrued  and  unpaid  prior to that date in  general  only to the  extent it was
allowed  pursuant to a forbearance  plan approved by HUD.  When  entitlement  to
insurance benefits results from assignment of the FHA Loan to HUD, the insurance
payment  includes  full  compensation  for  interest  accrued  and unpaid to the
assignment date. The insurance payment itself,  upon foreclosure of an FHA Loan,
bears  interest  from a date 30 days  after the  mortgagor's  first  uncorrected
failure to perform any  obligation  or make any  payment due under the  mortgage
loan and, upon assignment,  from the date of assignment,  to the date of payment
of the  claim,  in each case at the same  interest  rate as the  applicable  HUD
debenture interest rate as described above.

     The maximum  guarantee  that may be issued by the VA under a VA Loan is 50%
of the principal  amount of the VA Loan if the principal  amount of the mortgage
loan is $45,000 or less,  the lesser of $36,000 and 40% if the principal  amount
of the VA Loan if the  principal  amount of that VA Loan is greater than $45,000
but less than or equal to  $144,000,  and the lesser of  $46,000  and 25% of the
principal  amount of the mortgage loan if the  principal  amount of the mortgage
loan is greater than  $144,000.  The  liability  on the  guarantee is reduced or
increased pro rata with any reduction or increase in the amount of indebtedness,
but in no event will the amount  payable on the  guarantee  exceed the amount of
the  original  guarantee.  The VA may, at its option and  without  regard to the
guarantee, make full payment to a mortgage holder of unsatisfied indebtedness on
a mortgage upon its assignment to the VA.

     With respect to a defaulted VA Loan,  the servicer is,  absent  exceptional
circumstances,  authorized to announce its intention to foreclose  only when the
default has continued for three months.  Generally, a claim for the guarantee is
submitted after liquidation of the mortgaged property.

     The amount  payable  under the guarantee  will be the  percentage of the VA
Loan  originally  guaranteed  applied  to  indebtedness  outstanding  as of  the
applicable date of computation  specified in the VA regulations.  Payments under
the  guarantee  will be equal to the  unpaid  principal  amount  of the VA Loan,
interest accrued on the unpaid balance of the VA Loan to the appropriate date of
computation and limited expenses of the mortgagee,  but in each case only to the
extent that those amounts have not been  recovered  through  liquidation  of the
mortgaged  property.  The amount  payable  under the  guarantee  may in no event
exceed the amount of the original guarantee.

Standard Hazard Insurance Policies on Mortgage Loans

     The pooling and  servicing  agreement  will  require that  standard  hazard
insurance  policies  covering the mortgage  loans in a mortgage pool provide for
coverage at least equal to the applicable  state standard form of fire insurance
policy  with  extended  coverage.  In  general,  the  standard  form of fire and
extended  coverage  policy will cover physical damage to, or destruction of, the
improvements  on the mortgaged  property caused by fire,  lightning,  explosion,
smoke,  windstorm,  hail,  riot,  strike  and civil  commotion,  subject  to the
conditions and exclusions  particularized  in each policy.  Because the standard
hazard  insurance  policies  relating to mortgage loans will be  underwritten by
different  insurers  and will  cover  mortgaged  properties  located  in various
states, those policies will not contain identical terms and conditions. The most
significant  terms thereof,  however,  generally will be determined by state law
and generally will be similar.

     Most  standard  hazard  insurance  policies  typically  will not  cover any
physical  damage  resulting from the following:  war,  revolution,  governmental
actions,  floods and other water-  related  causes,  earth  movement,  including
earthquakes,  landslides and mudflows, nuclear reaction, wet or dry rot, vermin,
rodents,  insects or domestic animals,  theft and, in certain cases,  vandalism.
The foregoing list is merely  indicative of certain kinds of uninsured risks and
is not intended to be all-inclusive.

     The  standard  hazard  insurance  policies  covering  mortgaged  properties
securing mortgage loans typically will contain a "coinsurance"  clause which, in
effect,  will require the insured at all times to carry insurance of a specified
percentage,  generally  80%  to  90%,  of  the  full  replacement  value  of the
dwellings,  structures and other improvements on the mortgaged property in order
to recover the full amount of any partial loss. If the insured's

                                       55
<PAGE>

coverage  falls below this specified  percentage,  the  coinsurance  clause will
provide  that the  insurer's  liability  in the event of  partial  loss will not
exceed the greater of:

o    the actual cash value, the replacement cost less physical depreciation,  of
     the dwellings, structures and other improvements damaged or destroyed; or

o    the  proportion of the loss,  without  deduction for  depreciation,  as the
     amount of insurance  carried bears to the specified  percentage of the full
     replacement   cost  of  the  related   dwellings,   structures   and  other
     improvements.

     The depositor  will not require that a standard  hazard or flood  insurance
policy be maintained on the  Cooperative  Dwelling  relating to any  Cooperative
Loan. Generally, the Cooperative itself is responsible for maintenance of hazard
insurance for the property owned by the Cooperative and the  tenant-stockholders
of that Cooperative do not maintain individual hazard insurance policies. To the
extent,  however,  that a Cooperative and the related  borrower on a Cooperative
Loan do not  maintain  insurance  or do not  maintain  adequate  coverage or any
insurance  proceeds are not applied to the restoration of damaged property,  any
damage to that borrower's  Cooperative  Dwelling or that Cooperative's  building
could  significantly  reduce the value of the  collateral  securing  the related
Cooperative Loan to the extent not covered by other credit support.

     Any losses incurred with respect to mortgage loans due to uninsured  risks,
including  earthquakes,  mudflows  and,  with  respect to  mortgaged  properties
located in areas other than HUD designated flood areas,  floods, or insufficient
hazard  insurance  proceeds  and any  hazard  losses  incurred  with  respect to
Cooperative Loans could affect distributions to the certificateholders.

     With respect to mortgage  loans secured by commercial  property,  Mixed-Use
Property and multifamily property,  certain additional insurance policies may be
required;  for  example,  general  liability  insurance  for  bodily  injury and
property  damage,  steam boiler  coverage where a steam boiler or other pressure
vessel is in operation,  business interruption insurance and rent loss insurance
to  cover  income  losses  following  damage  or  destruction  of the  mortgaged
property.  The related prospectus supplement will specify the required types and
amounts of additional insurance that may be required in connection with mortgage
loans  secured  by  commercial  property,  Mixed-Use  Property  and  multifamily
property and will describe the general terms of such insurance and conditions to
payment thereunder.

Standard Hazard Insurance Policies on the Manufactured Homes

     The terms of the pooling and servicing  agreement will require the servicer
to cause to be  maintained  with respect to each  contract one or more  standard
hazard insurance  policies which provide,  at a minimum,  the same coverage as a
standard form file and extended coverage  insurance policy that is customary for
manufactured housing,  issued by a company authorized to issue those policies in
the state in which the manufactured  home is located,  and in an amount which is
not less  than the  maximum  insurable  value of that  manufactured  home or the
principal  balance due from the obligor on the related  contract,  whichever  is
less; provided,  however,  that the amount of coverage provided by each standard
hazard  insurance  policy shall be  sufficient to avoid the  application  of any
coinsurance  clause contained in the related  standard hazard insurance  policy.
When a  manufactured  home's  location  was, at the time of  origination  of the
related  contract,  within a federally  designated flood area, the servicer also
shall cause such flood  insurance to be  maintained,  which coverage shall be at
least equal to the minimum  amount  specified in the preceding  sentence or such
lesser  amount as may be available  under the federal flood  insurance  program.
Each standard  hazard  insurance  policy caused to be maintained by the servicer
shall  contain a standard  loss payee  clause in favor of the  servicer  and its
successors and assigns.  If any obligor is in default in the payment of premiums
on its standard hazard insurance policy or policies,  the servicer shall pay the
premiums  out of its own  funds,  and  may add  separately  the  premium  to the
obligor's obligation as provided by the contract, but may not add the premium to
the remaining principal balance of the contract.

     The servicer may maintain,  in lieu of causing  individual  standard hazard
insurance  policies to be maintained with respect to each manufactured home, and
shall  maintain,  to the extent that the related  contract  does not require the
obligor to  maintain a standard  hazard  insurance  policy  with  respect to the
related  manufactured  home,  one or more blanket  insurance  policies  covering
losses on the obligor's interest in the contracts resulting from


                                       56
<PAGE>

the absence or insufficiency of individual  standard hazard insurance  policies.
Any blanket policy shall be  substantially in the form and in the amount carried
by the  servicer  as of the date of the  pooling and  servicing  agreement.  The
servicer  shall pay the  premium for the policy on the basis  described  in that
policy and shall pay any  deductible  amount  with  respect to claims  under the
policy relating to the contracts.  If the insurer  thereunder  shall cease to be
acceptable  to the servicer,  the servicer  shall  exercise its best  reasonable
efforts to obtain from another  insurer a replacement  policy  comparable to the
original policy.

     If the servicer shall have repossessed a manufactured home on behalf of the
trustee, the servicer shall either:

o    maintain hazard  insurance with respect to the related  manufactured  home,
     which expenses will be  reimbursable to the servicer out of the trust fund;
     or

o    indemnify the trustee against any damage to the related  manufactured  home
     prior to resale or other disposition.

Pool Insurance Policies

     If stated in the related prospectus supplement,  the servicer will obtain a
pool  insurance  policy  for a mortgage  pool  underlying  certificates  of that
series.  The pool  insurance  policy will be issued by the pool insurer named in
the applicable prospectus supplement.  Each pool insurance policy will cover any
loss,  subject to the limitations  described  below, by reason of default to the
extent  the  related  mortgage  loan  is not  covered  by any  primary  mortgage
insurance  policy,  FHA  insurance  or VA  guarantee.  The  amount  of the  pool
insurance  policy,  if any,  with  respect to a series will be  specified in the
related prospectus supplement.  A pool insurance policy,  however, will not be a
blanket  policy  against loss,  because  claims  thereunder may only be made for
particular  defaulted  mortgage  loans and only  upon  satisfaction  of  certain
conditions  precedent  described below. Any pool insurance  policies relating to
the contracts will be described in the related prospectus supplement.

     The pool  insurance  policy  generally  will  provide  that as a  condition
precedent to the payment of any claim the insured will be required

      (1)  to advance  hazard  insurance  premiums  on the  mortgaged  property
           securing the defaulted mortgage loan;

      (2)  to  advance,  as  necessary  and  approved  in  advance  by the pool
           insurer,

o    real estate property taxes;

o    all expenses  required to preserve and repair the  mortgaged  property,  to
     protect the mortgaged  property from waste, so that the mortgaged  property
     is in at least as good a  condition  as  existed  on the  date  upon  which
     coverage  under the pool  insurance  policy  with  respect  to the  related
     mortgaged property first became effective, ordinary wear and tear excepted;

o    property sales expenses;

o    any outstanding liens on the mortgaged property; and

o    foreclosure costs including court costs and reasonable attorneys' fees; and

      (3)  if there has been physical loss or damage to the mortgaged  property,
           to restore the mortgaged  property to its condition,  reasonable wear
           and tear excepted, as of the issue date of the pool insurance policy.

It also will be a condition precedent to the payment of any claim under the pool
insurance policy that the related insured maintain a primary mortgage  insurance
policy that is  acceptable  to the pool insurer on all mortgage  loans that have
loan-to-value  ratios at the time of origination in excess of 80%. FHA insurance
and VA  guarantees  will be  considered  to be an  acceptable  primary  mortgage
insurance policy under the pool insurance policy.

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<PAGE>

     Assuming  satisfaction of these  conditions,  the related pool insurer will
pay to the related  insured the amount of loss,  but not more than the remaining
amount of coverage under the pool insurance policy determined as follows:

(1)  the amount of the unpaid  principal  balance of the related  mortgage  loan
     immediately prior to the Approved Sale of the mortgaged property;

(2)  the amount of the accumulated  unpaid interest on the related mortgage loan
     to the date of claim settlement at the applicable mortgage rate; and

(3)  advances as described above, less:

o    all  rents or  other  payments,  excluding  proceeds  of fire and  extended
     coverage insurance, collected or received by the related insured, which are
     derived from or in any way related to the mortgaged property;

o    amounts paid under applicable fire and extended coverage policies which are
     in excess of the cost of restoring and repairing the mortgaged property and
     which have not been applied to the payment of the related mortgage loan;

o    any claims  payments  previously  made by the pool  insurer on the  related
     mortgage loan;

o    due and unpaid premiums payable with respect to the pool insurance  policy;
     and

o    all claim payments  received by the related insured pursuant to any primary
     mortgage insurance policy.

     The related pool insurer must be provided with good and merchantable  title
to the mortgaged property as a condition  precedent to the payment of any amount
of a claim  for  benefits  under a primary  mortgage  insurance  policy.  If any
mortgaged  property  securing  a  defaulted  mortgage  loan is  damaged  and the
proceeds,  if any,  from the related  standard  hazard  insurance  policy or the
applicable  special  hazard  insurance  policy are  insufficient  to restore the
mortgaged  property to a condition  sufficient to permit recovery under the pool
insurance  policy,  the servicer or the subservicer of the related mortgage loan
will not be required  to expend its own funds to restore  the damaged  mortgaged
property unless it is determined:

o    that the restoration  will increase the proceeds to the  certificateholders
     of  the  related  series  on  liquidation  of  the  mortgage  loan,   after
     reimbursement  of the expenses of the servicer or the  subservicer,  as the
     case may be; and

o    that the expenses  will be  recoverable  by it through  payments  under the
     financial  guaranty  insurance policy,  surety bond or letter of credit, if
     any, with respect to that series, Liquidation Proceeds, Insurance Proceeds,
     amounts in the reserve  fund,  if any, or  payments  under any  Alternative
     Credit Support, if any, with respect to that series.

     No pool insurance policy will insure,  and many primary mortgage  insurance
policies may not insure,  against loss sustained by reason of a default  arising
from, among other things:

      (1)  fraud or  negligence  in the  origination  or servicing of a mortgage
           loan, including  misrepresentation by the mortgagor, any unaffiliated
           seller,  the originator or other persons  involved in the origination
           thereof; or

      (2)  the  exercise by the  related  insured of a  "due-on-sale"  clause or
           other similar provision in the mortgage loan.

     Depending upon the nature of the event, a breach of representation  made by
the  depositor  or a  seller  may  also  have  occurred.  Such a  breach,  if it
materially and adversely affects the interests of the certificateholders of that
series and cannot be cured,  would give rise to a repurchase  obligation  on the
part of the  depositor  or seller  as more  fully  described  under  "The  Trust
Fund--Mortgage   Loan    Program--Representations   by   Unaffiliated   Sellers;
Repurchases"  and  "Description  of  the  Certificates--Assignment  of  Mortgage
Loans."

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<PAGE>

     The original  amount of coverage  under the pool  insurance  policy will be
reduced over the life of the certificates of the related series by the aggregate
dollar amount of claims paid less the  aggregate of the net amounts  realized by
the pool insurer upon disposition of all foreclosed mortgaged properties covered
thereby.

     The amount of claims paid will  include  certain  expenses  incurred by the
servicer or by the subservicer of the defaulted mortgage loan as well as accrued
interest  on  delinquent  mortgage  loans to the date of  payment  of the claim.
Accordingly,  if aggregate net claims paid under a pool  insurance  policy reach
the original policy limit,  coverage under the pool insurance  policy will lapse
and any further losses will be borne by the holders of the  certificates of that
series.  In  addition,  unless the  servicer  or the related  subservicer  could
determine  that an Advance in respect  of a  delinquent  mortgage  loan would be
recoverable to it from the proceeds of the  liquidation of that mortgage loan or
otherwise,  neither the  subservicer nor the servicer would be obligated to make
an Advance respecting any delinquency, since the Advance would not be ultimately
recoverable  to it from  either  the pool  insurance  policy  or from any  other
related source. See "Description of the Certificates--Advances."

     Any pool  insurance  policy  for a  contract  pool  underlying  a series of
certificates will be described in the related prospectus supplement.

Special Hazard Insurance Policies

     If stated in the related prospectus supplement, the servicer shall obtain a
special  hazard  insurance  policy for the mortgage pool  underlying a series of
certificates.  A special hazard  insurance policy for a mortgage pool underlying
the  certificates of a series will be issued by the special hazard insurer named
in the applicable  prospectus  supplement.  Each special hazard insurance policy
will, subject to the limitations described below, protect against loss by reason
of damage to mortgaged properties caused by certain hazards, including vandalism
and  earthquakes  and,  except  where the  mortgagor is required to obtain flood
insurance,  floods and mudflows,  not insured against under the standard form of
hazard  insurance  policy  for the  respective  states  in which  the  mortgaged
properties are located.  See  "Description of the  Certificates--Maintenance  of
Insurance  Policies"  and  "--Standard  Hazard  Insurance."  The special  hazard
insurance policy will not cover losses  occasioned by war, certain  governmental
actions,  nuclear  reaction and certain other perils.  Coverage  under a special
hazard  insurance  policy  will be at least equal to the amount set forth in the
related prospectus supplement.

     Subject to the foregoing limitations,  each special hazard insurance policy
will provide that, when there has been damage to the mortgaged property securing
a  defaulted  mortgage  loan and to the extent the damage is not  covered by the
standard  hazard  insurance  policy,  if any,  maintained by the mortgagor,  the
servicer or the subservicer, the special hazard insurer will pay the lesser of:

o    the cost of repair or replacement of the mortgaged property; or

o    upon transfer of the mortgaged property to the special hazard insurer,  the
     unpaid  balance of the related  mortgage loan at the time of acquisition of
     the mortgaged property by foreclosure or deed in lieu of foreclosure,  plus
     accrued  interest to the date of claim  settlement,  excluding late charges
     and  penalty  interest,  and  certain  expenses  incurred in respect of the
     mortgaged property.

     No claim may be validly  presented under a special hazard  insurance policy
unless:

o    hazard insurance on the mortgaged property has been kept in force and other
     reimbursable  protection,  preservation and foreclosure  expenses have been
     paid,  all of which must be approved in advance as necessary by the related
     insurer; and

o    the  related  insured has  acquired  title to the  mortgaged  property as a
     result of default by the mortgagor.

If the sum of the unpaid  principal  balance plus  accrued  interest and certain
expenses is paid by the special hazard insurer,  the amount of further  coverage
under the related special hazard insurance policy will be reduced by that amount
less any net proceeds from the sale of the mortgaged  property.  Any amount paid
as the cost of repair of the mortgaged  property will further reduce coverage by
that amount.

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<PAGE>

     The terms of the related  pooling and servicing  agreement will require the
subservicer  to maintain the special hazard  insurance  policy in full force and
effect  throughout  the term of the pooling and servicing  agreement.  If a pool
insurance  policy is required to be maintained  pursuant to the related  pooling
and servicing agreement, the special hazard insurance policy will be designed to
permit full recoveries under the pool insurance  policy in  circumstances  where
recoveries would otherwise be unavailable because the related mortgaged property
has been damaged by a cause not insured against by a standard  hazard  insurance
policy. In that event, the related pooling and servicing  agreement will provide
that,  if the  related  pool  insurance  policy  shall have  terminated  or been
exhausted  through  payment of  claims,  the  servicer  will be under no further
obligation to maintain the special hazard insurance policy.

     Any special  hazard  insurance  policies for a contract  pool  underlying a
series of certificates will be described in the related prospectus supplement.

Mortgagor Bankruptcy Bond

     In the event of a personal  bankruptcy of a mortgagor,  a bankruptcy  court
may  establish  the  value of the  related  mortgaged  property  or  Cooperative
Dwelling at an amount less than the then  outstanding  principal  balance of the
related  mortgage  loan. The amount of the secured debt could be reduced to that
lesser value, and the holder of the mortgage loan thus would become an unsecured
creditor to the extent the outstanding  principal  balance of that mortgage loan
exceeds the value so assigned to the related  mortgaged  property or Cooperative
Dwelling by the bankruptcy  court. In addition,  certain other  modifications of
the terms of a mortgage loan can result from a bankruptcy proceeding.  If stated
in the  related  prospectus  supplement,  losses  resulting  from  a  bankruptcy
proceeding affecting the mortgage loans in a mortgage pool will be covered under
a mortgagor  bankruptcy  bond, or any other instrument that will not result in a
downgrading of the rating of the  certificates of a series by the related Rating
Agency.  Any  mortgagor  bankruptcy  bond will provide for coverage in an amount
acceptable to the related Rating Agency,  which will be set forth in the related
prospectus  supplement.  Subject to the terms of the mortgagor  bankruptcy bond,
the issuer thereof may have the right to purchase any mortgage loan with respect
to which a payment or drawing  has been made or may be made for an amount  equal
to the  outstanding  principal  amount of that  mortgage  loan plus  accrued and
unpaid  interest  thereon.  The coverage of the mortgagor  bankruptcy  bond with
respect to a series of certificates may be reduced as long as any reduction will
not result in a reduction of the outstanding  rating of the certificates of that
series by the related Rating Agency.

           Certain Legal Aspects of the Mortgage Loans and Contracts

     The following  discussion  contains  summaries of some legal aspects of the
mortgage  loans and  contracts  that are general in nature.  Because these legal
aspects are governed in part by state law,  which laws may differ  substantially
from state to state, the summaries do not purport to be complete, to reflect the
laws of any particular state or to encompass the laws of all states in which the
mortgaged properties may be situated. These legal aspects are in addition to the
requirements of any applicable FHA regulations  described in "Description of FHA
Insurance" in this  prospectus  and in the  accompanying  prospectus  supplement
regarding the contracts  partially  insured by FHA under Title I of the National
Housing  Act,  or Title I. The  summaries  are  qualified  in their  entirety by
reference to the applicable  federal and state laws governing the mortgage loans
and contracts.

The Mortgage Loans

     General.  The mortgage loans, other than Cooperative Loans, will be secured
by deeds of trust, mortgages or deeds to secure debt depending on the prevailing
practice in the state in which the  related  mortgaged  property is located.  In
some states, a mortgage,  deed of trust or deed to secure debt creates a lien on
the related real property. In other states, the mortgage,  deed of trust or deed
to secure debt conveys legal title to the property to the mortgagee subject to a
condition  subsequent,  for  example,  the payment of the  indebtedness  secured
thereby.  These  instruments are not prior to the lien for real estate taxes and
assessments and other charges imposed under governmental police powers. Priority
with  respect to these  instruments  depends on their terms and in some cases on
the terms of separate  subordination or inter-creditor  agreements,  and in most
cases  on the  order of  recordation  of the  mortgage  deed of trust or deed to
secure debt in the appropriate recording office.

                                       60
<PAGE>

     There are two parties to a mortgage, the mortgagor, who is the borrower and
homeowner,  and the mortgagee, who is the lender. Under the mortgage instrument,
the mortgagor delivers to the mortgagee a note or bond and the mortgage. In some
states,  three parties may be involved in a mortgage financing when title to the
property is held by a land  trustee  under a land trust  agreement  of which the
borrower  is the  beneficiary;  at  origination  of a  mortgage  loan,  the land
trustee,  as fee owner of the  property,  executes the mortgage and the borrower
executes a separate  undertaking to make payments on the related  Mortgage Note.
Although  a deed of trust is similar  to a  mortgage,  a deed of trust has three
parties: the grantor, who is the borrower/homeowner; the beneficiary, who is the
lender; and a third-party grantee called the trustee. Under a deed of trust, the
borrower  grants the  mortgaged  property  to the trustee for the benefit of the
beneficiary,  irrevocably until  satisfaction of the debt. A deed to secure debt
typically has two parties,  under which the borrower, or grantor,  conveys title
to the real property to the grantee, or lender,  typically with a power of sale,
until the time when the debt is repaid. The trustee's  authority under a deed of
trust and the  mortgagee's or grantee's  authority under a mortgage or a deed to
secure debt,  as  applicable,  are governed by the law of the state in which the
real property is located, the express provisions of the deed of trust,  mortgage
or deed to secure debt and, in some deed of trust  transactions,  the directions
of the beneficiary.

     Cooperative  Loans.  If stated in the prospectus  supplement  relating to a
series of  securities,  the  loans  may  include  Cooperative  Loans.  Each note
evidencing a Cooperative  Loan will be secured by a security  interest in shares
issued by the Cooperative  that owns the related  apartment  building and in the
related  proprietary lease or occupancy  agreement  granting exclusive rights to
occupy a specific  dwelling  unit in the  Cooperative's  building.  The security
agreement  will  create  a lien  on,  or  grant  a  security  interest  in,  the
Cooperative shares and proprietary leases or occupancy agreements,  the priority
of which  will  depend  on,  among  other  things,  the terms of the  particular
security agreement as well as the order of recordation of the agreement,  or the
filing of the financing statements related thereto, in the appropriate recording
office or the taking of possession of the Cooperative  shares,  depending on the
law of the  state in which  the  Cooperative  is  located.  This type of lien or
security interest is not, in general, prior to liens in favor of the cooperative
corporation for unpaid assessments or common charges.

     In most cases, each Cooperative owns in fee or has a leasehold  interest in
all the real  property  and owns in fee or leases the  building and all separate
dwelling units in the Cooperative.  The Cooperative is directly  responsible for
property  management  and, in most cases,  payment of real estate  taxes,  other
governmental  impositions  and hazard and  liability  insurance.  If there is an
underlying  mortgage or mortgages on the  Cooperative's  building or  underlying
land, as is typically  the case,  or an underlying  lease of the land, as is the
case in some instances, the Cooperative, as mortgagor or lessee, as the case may
be, is also responsible for fulfilling the mortgage or rental obligations.

     An underlying  mortgage loan is ordinarily  obtained by the  Cooperative in
connection  with  either  the  construction  or  purchase  of the  Cooperative's
building or the  obtaining  of capital by the  Cooperative.  The interest of the
occupant  under  proprietary  leases or  occupancy  agreements  as to which that
Cooperative is the landlord is usually subordinate to the interest of the holder
of an underlying  mortgage and to the interest of the holder of a land lease. If
the Cooperative is unable to meet the payment obligations:

o    arising under an underlying  mortgage,  the mortgagee holding an underlying
     mortgage  could  foreclose on that mortgage and  terminate all  subordinate
     proprietary leases and occupancy agreements; or

o    arising under its land lease;

the holder of the landlord's  interest  under the land lease could  terminate it
and all subordinate proprietary leases and occupancy agreements. In addition, an
underlying  mortgage on a  Cooperative  may provide  financing  in the form of a
mortgage that does not fully amortize,  with a significant  portion of principal
being due in one final payment at maturity.  The inability of the Cooperative to
refinance a mortgage  and its  consequent  inability  to make the final  payment
could  lead to  foreclosure  by the  mortgagee.  Similarly,  a land lease has an
expiration  date and the inability of the  Cooperative to extend its term or, in
the  alternative,  to  purchase  the  land,  could  lead to  termination  of the
Cooperative's interest in the property and termination of all proprietary leases
and occupancy  agreements.  In either event,  a foreclosure  by the holder of an
underlying  mortgage or the termination of the underlying  lease could eliminate
or  significantly  diminish the value of any  collateral  held by the lender who
financed  the  purchase  by an



                                       61
<PAGE>

individual  tenant-stockholder  of shares of the Cooperative,  or in the case of
the loans, the collateral securing the Cooperative Loans.

     Each   Cooperative   is   owned   by    shareholders,    referred   to   as
tenant-stockholders,   who,  through   ownership  of  stock  or  shares  in  the
Cooperative,  receive  proprietary  leases or occupancy  agreements which confer
exclusive   rights  to  occupy  specific   dwellings.   In  most  instances,   a
tenant-stockholder  of a Cooperative must make a monthly  maintenance payment to
the Cooperative under the proprietary lease, which rental payment represents the
tenant-stockholder's  pro  rata  share  of the  Cooperative's  payments  for its
underlying mortgage, real property taxes, maintenance expenses and other capital
or ordinary  expenses.  An ownership  interest in a Cooperative and accompanying
occupancy  rights may be financed through a Cooperative Loan evidenced by a note
and  secured  by an  assignment  of and a  security  interest  in the  occupancy
agreement or proprietary  lease and a security interest in the related shares of
the  related  Cooperative.  The lender  usually  takes  possession  of the stock
certificate  and a counterpart of the proprietary  lease or occupancy  agreement
and a financing  statement covering the proprietary lease or occupancy agreement
and the Cooperative shares is filed in the appropriate state or local offices to
perfect  the  lender's  interest  in its  collateral.  In  accordance  with  the
limitations  discussed below, on default of the  tenant-stockholder,  the lender
may sue for judgment on the related note,  dispose of the collateral at a public
or   private   sale   or   otherwise   proceed   against   the   collateral   or
tenant-stockholder  as an  individual  as  provided  in the  security  agreement
covering the assignment of the proprietary lease or occupancy  agreement and the
pledge of Cooperative  shares.  See "--Foreclosure on Shares of Cooperatives" in
this prospectus.

     Tax Aspects of Cooperative Ownership.  In general, a  "tenant-stockholder,"
as  defined  in  Section  216(b)(2)  of the  216(b)(1)  of the Code is allowed a
deduction  for amounts  paid or accrued  within his or her  taxable  year to the
corporation  representing  his or her  proportionate  share of certain  interest
expenses and real estate taxes  allowable as a deduction under Section 216(a) of
the Code to the corporation under Sections 163 and 164 of the Code. In order for
a corporation  to qualify  under  Section  216(b)(1) of the Code for its taxable
year in which those items are allowable as a deduction to the  corporation,  the
section requires,  among other things,  that at least 80% of the gross income of
the  corporation  be  derived  from its  tenant-stockholders.  By virtue of this
requirement,  the status of a corporation  for purposes of Section  216(b)(1) of
the Code must be determined on a year-to-year basis. Consequently,  there can be
no assurance that  Cooperatives  relating to the Cooperative  Loans will qualify
under this section for any  particular  year. If a Cooperative  fails to qualify
for  one or more  years,  the  value  of the  collateral  securing  any  related
Cooperative Loans could be significantly  impaired because no deduction would be
allowable to  tenant-stockholders  under Section 216(a) of the Code with respect
to  those  years.  In view of the  significance  of the  tax  benefits  accorded
tenant-stockholders  of a corporation that qualifies under Section  216(b)(1) of
the Code,  the  likelihood  that  this type of  failure  would be  permitted  to
continue over a period of years appears remote.

     Foreclosure on Mortgage Loans. Although a deed of trust or a deed to secure
debt may also be foreclosed by judicial  action,  foreclosure of a deed of trust
or a deed to secure debt is typically  accomplished by a non-judicial sale under
a  specific  provision  in the  deed  of  trust  or deed to  secure  debt  which
authorizes  the  trustee or  grantee,  as  applicable,  to sell the  property on
default by the borrower  under the terms of the note or deed of trust or deed to
secure debt. In addition to any notice requirements contained in a deed of trust
or deed to secure debt, in some states,  the trustee or grantee,  as applicable,
must  record a notice  of  default  and send a copy to the  borrower  and to any
person who has  recorded a request for a copy of notice of default and notice of
sale. In addition,  in some states, the trustee or grantee, as applicable,  must
provide notice to any other individual  having an interest of record in the real
property,  including  any  junior  lienholders.  If the deed of trust or deed to
secure debt is not reinstated  within a specified  period, a notice of sale must
be posted in a public place and, in most states, published for a specific period
of time in one or more newspapers. In addition, some states' laws require that a
copy of the  notice of sale be posted on the  property  and sent to all  parties
having an interest of record in the real property.

     Foreclosure of a mortgage  usually is accomplished by judicial  action.  In
most cases,  the action is  initiated  by the service of legal  pleadings on all
parties having an interest of record in the real property.  Delays in completion
of the  foreclosure  may  result  from  difficulties  in  locating  and  serving
necessary parties, including borrowers, such as international borrowers, located
outside  the   jurisdiction   in  which  the  mortgaged   property  is  located.
Difficulties  in  foreclosing  on mortgaged  properties  owned by  international
borrowers may result in increased foreclosure costs, which may reduce the amount
of proceeds from the liquidation of the related loan available to be distributed
to  the  certificateholders  of the  related  series.  In  addition,  delays  in
completion of the foreclosure and additional losses may


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result where loan documents relating to the loan are missing. If the mortgagee's
right to foreclose is contested,  the legal proceedings necessary to resolve the
issue can be time-consuming.

     In some states,  the  borrower  has the right to reinstate  the loan at any
time following  default until shortly before the trustee's sale. In general,  in
those states,  the borrower,  or any other person having a junior encumbrance on
the real estate, may, during a reinstatement  period, cure the default by paying
the entire  amount of defaulted  payments and all other sums owing lender due to
the default, plus the costs and expenses incurred in enforcing the obligation.

     In the case of  foreclosure  under a  mortgage,  a deed of trust or deed to
secure  debt,  the sale by the  referee  or other  designated  officer or by the
trustee or grantee,  as applicable,  is a public sale.  However,  because of the
difficulty  a  potential  buyer at the sale may have in  determining  the  exact
status of title and because the  physical  condition  of the  property  may have
deteriorated  during the  foreclosure  proceedings,  it is uncommon  for a third
party to purchase the property at a foreclosure  sale.  Rather, it is common for
the lender to purchase the property from the trustee or grantee,  as applicable,
or referee for a credit bid less than or equal to the unpaid principal amount of
the loan,  accrued and unpaid interest and the expense of foreclosure,  in which
case the mortgagor's  debt will be extinguished  unless the lender purchases the
property for a lesser  amount and preserves its right against a borrower to seek
a  deficiency  judgment  if such  remedy is  available  under  state law and the
related loan documents.  In some states,  there is a statutory  minimum purchase
price that the lender may offer for the  property  and in most cases,  state law
controls the amount of  foreclosure  costs and  expenses,  including  attorneys'
fees,  which may be recovered by a lender.  Thereafter,  subject to the right of
the  borrower  in some  states to remain in  possession  during  the  redemption
period,  the lender will assume the burdens of  ownership,  including  obtaining
hazard  insurance,  paying taxes and making  repairs at its own expense that are
necessary to render the property  suitable for sale.  In most cases,  the lender
will obtain the services of a real estate broker and pay the broker's commission
in connection with the sale of the property. Depending on market conditions, the
ultimate  proceeds  of the  sale of the  property  may not  equal  the  lender's
investment in the property and, in some states,  the lender may be entitled to a
deficiency judgment. In some cases, a deficiency judgment may be pursued in lieu
of foreclosure. Any loss may be reduced by the receipt of any mortgage insurance
proceeds or other forms of credit  enhancement  for a series of securities.  See
"Description of Credit Enhancement" in this prospectus.

     Foreclosure on Junior Mortgage Loans. A junior  mortgagee may not foreclose
on the  property  securing a junior  loan  unless it  forecloses  subject to the
senior mortgages,  in which case it must either pay the entire amount due on the
senior  mortgages  to the  senior  mortgagees  prior  to or at the  time  of the
foreclosure  sale or undertake  the  obligation  to make  payments on the senior
mortgages if the mortgagor is in default thereunder,  in either event adding the
amounts  expended to the balance due on the junior  loan.  In  addition,  if the
foreclosure by a junior  mortgagee  triggers the  enforcement of a "due-on-sale"
clause in a senior  mortgage,  the junior  mortgagee  may be required to pay the
full amount of the senior mortgages to the senior mortgagees, to avoid a default
with respect thereto.  Accordingly, if the junior lender purchases the property,
the junior  lender's  title  will be subject to all senior  liens and claims and
certain governmental liens. The proceeds received by the referee or trustee from
the sale are applied  first to the costs,  fees and expenses of sale and then in
satisfaction of the  indebtedness  secured by the mortgage or deed of trust that
is being foreclosed. Any remaining proceeds are typically payable to the holders
of junior  mortgages  or deeds of trust and other  liens and  claims in order of
their  priority,  whether or not the  borrower  is in  default.  Any  additional
proceeds are usually  payable to the  mortgagor  or trustor.  The payment of the
proceeds to the holders of junior mortgages may occur in the foreclosure  action
of the senior  mortgagee  or may  require  the  institution  of  separate  legal
proceedings. See "Description of the Securities--Servicing and Administration of
Loans--Realization Upon Defaulted Loans" in this prospectus.

     Foreclosure on Shares of Cooperatives.  The Cooperative shares owned by the
tenant-stockholder, together with the rights of the tenant-stockholder under the
proprietary lease or occupancy agreement,  are pledged to the lender and are, in
almost all cases,  in accordance  with  restrictions on transfer as set forth in
the Cooperative's  certificate of incorporation  and by-laws,  as well as in the
proprietary  lease or occupancy  agreement.  The proprietary  lease or occupancy
agreement,  even while pledged,  may be cancelled by the Cooperative for failure
by the  tenant-stockholder  to pay rent or other  obligations or charges owed by
the  tenant-stockholder,  including  mechanics' liens against the  Cooperative's
building incurred by the tenant-stockholder.

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<PAGE>

     In most  cases,  rent and other  obligations  and charges  arising  under a
proprietary  lease or occupancy  agreement which are owed to the Cooperative are
made liens on the shares to which the proprietary  lease or occupancy  agreement
relates. In addition, the proprietary lease or occupancy agreement in most cases
permits the  Cooperative  to  terminate  the lease or  agreement if the borrower
defaults in the performance of covenants thereunder.  Typically,  the lender and
the  Cooperative  enter into a recognition  agreement  which,  together with any
lender  protection  provisions  contained in the proprietary  lease or occupancy
agreement,  establishes  the rights and obligations of both parties in the event
of a default by the  tenant-stockholder on its obligations under the proprietary
lease or  occupancy  agreement.  A default by the  tenant-stockholder  under the
proprietary lease or occupancy agreement will usually constitute a default under
the security agreement between the lender and the tenant-stockholder.

     The   recognition   agreement  in  most  cases   provides   that,   if  the
tenant-stockholder  has  defaulted  under  the  proprietary  lease or  occupancy
agreement,  the  Cooperative  will  take no  action  to  terminate  the lease or
agreement  until the lender has been provided with notice of and an  opportunity
to cure the default.  The recognition  agreement  typically provides that if the
proprietary  lease or occupancy  agreement is terminated,  the Cooperative  will
recognize the lender's  lien against  proceeds from a sale of the shares and the
proprietary  lease or occupancy  agreement  allocated to the dwelling,  subject,
however,  to the Cooperative's  right to sums due under the proprietary lease or
occupancy  agreement  or which have become  liens on the shares  relating to the
proprietary  lease  or  occupancy  agreement.  The  total  amount  owed  to  the
Cooperative  by the  tenant-stockholder,  which the lender in most cases  cannot
restrict and does not monitor,  could reduce the amount  realized upon a sale of
the collateral below the outstanding  principal  balance of the Cooperative Loan
and accrued and unpaid interest thereon.

     Recognition  agreements also typically  provide that if the lender succeeds
to the tenant-shareholder's  shares and proprietary lease or occupancy agreement
as the result of realizing  upon its  collateral  for a  Cooperative  Loan,  the
lender must  obtain the  approval  or consent of the board of  directors  of the
Cooperative  as  required  by the  proprietary  lease  before  transferring  the
Cooperative shares and assigning the proprietary lease. This approval or consent
is usually  based on the  prospective  purchaser's  income and net worth,  among
other factors, and may significantly reduce the number of potential  purchasers,
which could  limit the ability of the lender to sell and realize  upon the value
of the collateral. In most cases, the lender is not limited in any rights it may
have to dispossess the tenant-stockholder.

     Because of the nature of  Cooperative  Loans,  lenders do not  require  the
tenant-stockholder,  the  borrower,  to  obtain  title  insurance  of any  type.
Consequently,  the existence of any prior liens or other  imperfections of title
affecting the  Cooperative's  building or real estate also may adversely  affect
the  marketability  of the shares allocated to the dwelling unit in the event of
foreclosure.

     A foreclosure on the  Cooperative  shares is accomplished by public sale in
accordance with the provisions of Article 9 of the Uniform  Commercial  Code, or
UCC, and the security agreement  relating to those shares.  Article 9 of the UCC
requires that a sale be conducted in a "commercially reasonable" manner. Whether
a sale has been conducted in a "commercially  reasonable"  manner will depend on
the facts in each case. In determining commercial  reasonableness,  a court will
look to the notice  given the debtor and the  method,  manner,  time,  place and
terms of the  sale  and the sale  price.  In most  instances,  a sale  conducted
according to the usual practice of creditors  selling similar  collateral in the
same area will be considered reasonably conducted.

     Where the  lienholder  is the junior  lienholder,  any  foreclosure  may be
delayed  until  the  junior   lienholder   obtains  actual  possession  of  such
Cooperative shares.  Additionally,  if the lender does not have a first priority
perfected  security  interest in the Cooperative  shares,  any foreclosure  sale
would be subject to the rights and  interests  of any  creditor  holding  senior
interests in the shares.  Also, a junior  lienholder may not be able to obtain a
recognition  agreement from a Cooperative  since many cooperatives do not permit
subordinate financing.  Without a recognition  agreement,  the junior lienholder
will not be afforded the usual lender protections from the Cooperative which are
in most cases provided for in recognition agreements.

     Article 9 of the UCC provides that the proceeds of the sale will be applied
first  to pay the  costs  and  expenses  of the sale  and  then to  satisfy  the
indebtedness  secured  by  the  lender's  security  interest.   The  recognition
agreement,   however,  in  most  cases  provides  that  the  lender's  right  to
reimbursement is subject to the right of the Cooperative  corporation to receive
sums due under the proprietary lease or occupancy agreement. If there are


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proceeds remaining,  the lender must account to the  tenant-stockholder  for the
surplus. On the other hand, if a portion of the indebtedness remains unpaid, the
tenant-stockholder  is  in  most  cases  responsible  for  the  deficiency.  See
"--Anti-Deficiency  Legislation  and  Other  Limitations  on  Lenders"  in  this
prospectus.

     Rights of Redemption.  In some states, after sale under a deed of trust, or
a deed to secure debt or foreclosure of a mortgage,  the borrower and foreclosed
junior lienors or other parties are given a statutory period,  typically ranging
from six  months  to two  years,  in  which  to  redeem  the  property  from the
foreclosure  sale. In some states,  redemption  may occur only on payment of the
entire principal balance of the mortgage loan,  accrued interest and expenses of
foreclosure.  In  other  states,  redemption  may be  authorized  if the  former
borrower  pays only a  portion  of the sums due.  In some  states,  the right to
redeem is an equitable right. The equity of redemption, which is a non-statutory
right,  should be distinguished from statutory rights of redemption.  The effect
of a statutory  right of  redemption is to diminish the ability of the lender to
sell the foreclosed property. The rights of redemption would defeat the title of
any purchaser  subsequent to foreclosure or sale under a deed of trust or a deed
to secure debt. Consequently, the practical effect of the redemption right is to
force the lender to maintain  the  property  and pay the  expenses of  ownership
until the redemption period has expired.

     Anti-Deficiency  Legislation and Other Limitations on Lenders.  Some states
have imposed  statutory  prohibitions  which limit the remedies of a beneficiary
under a deed of trust, a mortgagee under a mortgage or a grantee under a deed to
secure debt. In some states,  including California,  statutes limit the right of
the  beneficiary,  mortgagee or grantee to obtain a deficiency  judgment against
the borrower following foreclosure. A deficiency judgment is a personal judgment
against the former  borrower equal in most cases to the  difference  between the
net amount realized upon the public sale of the real property and the amount due
to the lender.  In the case of a mortgage loan secured by a property  owned by a
trust where the Mortgage  Note is executed on behalf of the trust,  a deficiency
judgment  against the trust following  foreclosure or sale under a deed of trust
or deed to secure  debt,  even if  obtainable  under  applicable  law, may be of
little value to the  beneficiary,  grantee or mortgagee if there are no mortgage
loans against which the deficiency judgment may be executed. Some state statutes
require the beneficiary,  grantee or mortgagee to exhaust the security  afforded
under a deed of trust,  deed to secure  debt or mortgage  by  foreclosure  in an
attempt to satisfy the full debt before  bringing a personal  action against the
borrower.

     In other  states,  the lender has the option of bringing a personal  action
against the borrower on the debt without first exhausting the security; however,
in some of these states, the lender,  following judgment on the personal action,
may be deemed to have  elected a remedy  and may be  precluded  from  exercising
remedies for the security.  Consequently,  the practical  effect of the election
requirement,  in those states  permitting  this  election,  is that lenders will
usually  proceed  against the  security  first  rather than  bringing a personal
action against the borrower. Finally, in some states, statutory provisions limit
any  deficiency  judgment  against the borrower  following a foreclosure  to the
excess of the  outstanding  debt over the fair value of the property at the time
of the public sale.  The purpose of these statutes is in most cases to prevent a
beneficiary,  grantee or mortgagee  from obtaining a large  deficiency  judgment
against the borrower as a result of low or no bids at the judicial sale.

     In most cases,  Article 9 of the UCC  governs  foreclosure  on  Cooperative
shares and the related  proprietary  lease or occupancy  agreement.  Some courts
have  interpreted  Article 9 to  prohibit  or limit a  deficiency  award in some
circumstances,  including circumstances where the disposition of the collateral,
which, in the case of a Cooperative Loan, would be the shares of the Cooperative
and the related proprietary lease or occupancy agreement, was not conducted in a
commercially reasonable manner.

     In addition to laws limiting or prohibiting deficiency judgments,  numerous
other federal and state statutory  provisions,  including the federal bankruptcy
laws and state laws  affording  relief to debtors,  may interfere with or affect
the ability of the secured mortgage lender to realize upon its collateral and/or
enforce a deficiency  judgment.  For example,  under the federal bankruptcy law,
all actions  against the debtor,  the debtor's  property and any  co-debtor  are
automatically stayed upon the filing of a bankruptcy petition. Moreover, a court
having federal  bankruptcy  jurisdiction may permit a debtor through its Chapter
11 or Chapter 13  rehabilitative  plan to cure a monetary  default relating to a
mortgage  loan or  revolving  credit loan on the  debtor's  residence  by paying
arrearages  within a reasonable  time period and  reinstating  the original loan
payment  schedule,  even  though the lender  accelerated  the  mortgage  loan or
revolving  credit loan and final  judgment of  foreclosure  had been  entered in
state court.  Some courts with federal  bankruptcy  jurisdiction  have  approved
plans, based on the particular facts of


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the  reorganization  case,  that  effected  the  curing  of a  mortgage  loan or
revolving credit loan default by paying arrearages over a number of years.

     Courts with federal  bankruptcy  jurisdiction  have also indicated that the
terms of a mortgage  loan or  revolving  credit loan  secured by property of the
debtor may be modified.  These courts have  allowed  modifications  that include
reducing  the amount of each  monthly  payment,  changing  the rate of interest,
altering  the  repayment  schedule,  forgiving  all or a portion of the debt and
reducing  the lender's  security  interest to the value of the  residence,  thus
leaving the lender a general unsecured  creditor for the difference  between the
value of the  residence  and the  outstanding  balance of the  mortgage  loan or
revolving credit loan. In most cases,  however,  the terms of a mortgage loan or
revolving  credit loan secured only by a mortgage on real  property  that is the
debtor's  principal  residence may not be modified under a plan confirmed  under
Chapter 13, as opposed to Chapter 11,  except for mortgage  payment  arrearages,
which  may be  cured  within a  reasonable  time  period.  Courts  with  federal
bankruptcy  jurisdiction  similarly  may  be  able  to  modify  the  terms  of a
Cooperative Loan.

     Certain tax liens arising under the Code may, in some  circumstances,  have
priority over the lien of a mortgage, deed to secure debt or deed of trust. This
may have the effect of delaying or  interfering  with the  enforcement of rights
for a defaulted mortgage loan or revolving credit loan.

     In addition,  substantive  requirements  are imposed on mortgage lenders in
connection with the origination and the servicing of mortgage loans or revolving
credit loans by numerous federal and some state consumer  protection laws. These
laws include the federal Truth-in-Lending Act, Real Estate Settlement Procedures
Act,  Equal  Credit  Opportunity  Act,  Fair  Credit  Billing  Act,  Fair Credit
Reporting Act and related statutes. These federal laws impose specific statutory
liabilities on lenders who originate  mortgage  loans or revolving  credit loans
and who fail to comply  with the  provisions  of the law.  In some  cases,  this
liability may affect assignees of the mortgage loans or revolving credit loans.

     Some of the  mortgage  loans or  revolving  credit  loans  may be High Cost
Loans. Purchasers or assignees of any High Cost Loan, including any trust, could
be  liable  for all  claims  and  subject  to all  defenses  arising  under  any
applicable law that the borrower could assert against the originator of the High
Cost Loan.  Remedies  available to the borrower include monetary  penalties,  as
well as  rescission  rights  if the  appropriate  disclosures  were not given as
required.

     Alternative  Mortgage   Instruments.   Alternative  mortgage   instruments,
including  adjustable rate mortgage loans and early ownership  mortgage loans or
revolving credit loans,  originated by  non-federally  chartered  lenders,  have
historically  been subjected to a variety of  restrictions.  These  restrictions
differed from state to state, resulting in difficulties in determining whether a
particular  alternative  mortgage  instrument  originated  by a  state-chartered
lender was in compliance with applicable law. These difficulties were alleviated
substantially  as a result of the enactment of Title VIII of the Garn-St Germain
Act, or Title VIII. Title VIII provides that, regardless of any state law to the
contrary:

o    state-chartered  banks may originate  alternative  mortgage  instruments in
     accordance with regulations  promulgated by the Comptroller of the Currency
     for the origination of alternative mortgage instruments by national banks;

o    state-chartered   credit   unions  may   originate   alternative   mortgage
     instruments  in accordance  with  regulations  promulgated  by the National
     Credit  Union   Administration  for  origination  of  alternative  mortgage
     instruments by federal credit unions; and

o    all   other   non-federally   chartered   housing   creditors,    including
     state-chartered  savings  and loan  associations,  state-chartered  savings
     banks  and  mutual  savings  banks  and  mortgage  banking  companies,  may
     originate   alternative   mortgage   instruments  in  accordance  with  the
     regulations promulgated by the Federal Home Loan Bank Board, predecessor to
     the OTS, for  origination  of alternative  mortgage  instruments by federal
     savings and loan associations.

     Title VIII also  provides  that any state may reject  applicability  of the
provisions  of Title VIII by  adopting,  prior to  October  15,  1985,  a law or
constitutional   provision   expressly  rejecting  the  applicability  of  these
provisions. Some states have taken this action.

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<PAGE>

     Junior  Mortgages;  Rights  of Senior  Mortgagees.  The  mortgage  loans or
revolving  credit loans included in the trust may be junior to other  mortgages,
deeds  to  secure  debt or  deeds of trust  held by  other  lenders.  Absent  an
intercreditor   agreement,   the  rights  of  the  trust,   and   therefore  the
certificateholders,  as mortgagee  under a junior  mortgage,  are subordinate to
those of the mortgagee under the senior mortgage,  including the prior rights of
the senior mortgagee to receive hazard  insurance and condemnation  proceeds and
to cause the property  securing the mortgage loan or revolving credit loan to be
sold on  default  of the  mortgagor.  The  sale of the  mortgaged  property  may
extinguish the junior  mortgagee's lien unless the junior mortgagee  asserts its
subordinate  interest in the property in foreclosure  litigation and, in certain
cases,  either  reinstates or satisfies the  defaulted  senior  mortgage loan or
revolving  credit loan or mortgage  loans or revolving  credit  loans.  A junior
mortgagee may satisfy a defaulted  senior mortgage loan or revolving credit loan
in full or, in some states,  may cure the default and bring the senior  mortgage
loan or revolving  credit loan current  thereby  reinstating the senior mortgage
loan or  revolving  credit  loan,  in either  event  usually  adding the amounts
expended to the  balance due on the junior  mortgage  loan or  revolving  credit
loan. In most states, absent a provision in the mortgage, deed to secure debt or
deed of trust, or an intercreditor  agreement,  no notice of default is required
to be given to a junior  mortgagee.  Where  applicable  law or the  terms of the
senior  mortgage,  deed to secure debt or deed of trust do not require notice of
default to the junior  mortgagee,  the lack of any notice may prevent the junior
mortgagee from  exercising any right to reinstate the mortgage loan or revolving
credit loan which applicable law may provide.

     The  standard  form of the  mortgage,  deed to secure debt or deed of trust
used by most  institutional  lenders  confers on the mortgagee the right both to
receive all proceeds  collected under any hazard insurance policy and all awards
made in connection with condemnation proceedings,  and to apply the proceeds and
awards to any indebtedness secured by the mortgage,  deed to secure debt or deed
of trust, in the order as the mortgagee may determine.  Thus, if improvements on
the  property  are damaged or  destroyed  by fire or other  casualty,  or if the
property is taken by condemnation, the mortgagee or beneficiary under underlying
senior  mortgages  will have the prior right to collect any  insurance  proceeds
payable under a hazard  insurance  policy and any award of damages in connection
with the condemnation  and to apply the same to the indebtedness  secured by the
senior  mortgages.   Proceeds  in  excess  of  the  amount  of  senior  mortgage
indebtedness,  in most  cases,  may be  applied  to the  indebtedness  of junior
mortgages in the order of their priority.

     Another  provision  sometimes  found in the form of the  mortgage,  deed to
secure  debt or deed  of  trust  used by  institutional  lenders  obligates  the
mortgagor to pay before  delinquency  all taxes and  assessments on the property
and,  when due, all  encumbrances,  charges and liens on the property  which are
prior to the  mortgage,  deed to secure  debt or deed of trust,  to provide  and
maintain fire insurance on the property, to maintain and repair the property and
not to commit  or permit  any waste  thereof,  and to appear in and  defend  any
action or  proceeding  purporting  to affect the  property  or the rights of the
mortgagee under the mortgage or deed of trust.  After a failure of the mortgagor
to perform any of these  obligations,  the mortgagee or beneficiary is given the
right under certain mortgages, deeds to secure debt or deeds of trust to perform
the obligation itself, at its election, with the mortgagor agreeing to reimburse
the mortgagee for any sums expended by the mortgagee on behalf of the mortgagor.
All sums so  expended  by a senior  mortgagee  become  part of the  indebtedness
secured by the senior mortgage.  Also,  since most senior mortgages  require the
related mortgagor to make escrow deposits with the holder of the senior mortgage
for all real estate taxes and insurance  premiums,  many junior  mortgagees will
not  collect  and retain the  escrows  and will rely on the holder of the senior
mortgage to collect and disburse the escrows.

     The form of credit line trust deed or mortgage  used by most  institutional
lenders that make revolving  credit loans typically  contains a "future advance"
clause,  which provides,  in essence,  that additional amounts advanced to or on
behalf of the  borrower  by the  beneficiary  or lender are to be secured by the
deed of trust or mortgage.  The  priority of the lien  securing any advance made
under the  clause  may  depend in most  states on  whether  the deed of trust or
mortgage  is  designated  as a credit  line  deed of trust or  mortgage.  If the
beneficiary or lender advances  additional  amounts,  the advance is entitled to
receive the same priority as amounts initially  advanced under the trust deed or
mortgage,  regardless  of the fact  that  there  may be  junior  trust  deeds or
mortgages  and other liens that  intervene  between the date of recording of the
trust deed or mortgage and the date of the future  advance,  and regardless that
the beneficiary or lender had actual knowledge of these intervening junior trust
deeds or mortgages  and other liens at the time of the advance.  In most states,
the trust deed or mortgage  lien  securing  mortgage  loans or revolving  credit
loans of the type that includes revolving credit loans applies  retroactively to
the date of the original recording of the trust deed or mortgage,  provided that
the total amount of advances under the credit limit does not


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exceed the maximum  specified  principal  amount of the  recorded  trust deed or
mortgage,  except as to advances  made after  receipt by the lender of a written
notice of lien from a judgment lien creditor of the trustor.

The Manufactured Housing Contracts

     General. A manufactured housing contract evidences both:

o    the obligation of the mortgagor to repay the loan evidenced thereby; and

o    the  grant  of a  security  interest  in the  manufactured  home to  secure
     repayment of the loan.

Certain  aspects of both  features of the  manufactured  housing  contracts  are
described below.

     Security Interests in Manufactured Homes. The law governing perfection of a
security  interest in a manufactured  home varies from state to state.  Security
interests  in  manufactured  homes may be  perfected  either by  notation of the
secured  party's lien on the certificate of title or by delivery of the required
documents and payments of a fee to the state motor vehicle authority,  depending
on state law. In some non-title  states,  perfection under the provisions of the
UCC is  required.  The lender,  the  subservicer  or the servicer may effect the
notation or delivery of the required  documents and fees, and obtain  possession
of the certificate of title, as appropriate under the laws of the state in which
any manufactured home securing a manufactured housing contract is registered. If
the  servicer,  the  subservicer  or the lender  fails to effect the notation or
delivery, or files the security interest under the wrong law, for example, under
a motor vehicle title  statute  rather than under the UCC, in a few states,  the
certificateholders  may  not  have a first  priority  security  interest  in the
manufactured  home securing a manufactured  housing  contract.  As  manufactured
homes have become larger and often have been attached to their sites without any
apparent  intention  to  move  them,  courts  in  many  states  have  held  that
manufactured  homes,  under certain  circumstances,  may become  subject to real
estate  title  and  recording  laws.  As a  result,  a  security  interest  in a
manufactured  home  could be  rendered  subordinate  to the  interests  of other
parties claiming an interest in the home under applicable state real estate law.
In order to perfect a security interest in a manufactured home under real estate
laws, the holder of the security interest must record a mortgage,  deed of trust
or deed to secure debt, as  applicable,  under the real estate laws of the state
where the manufactured  home is located.  These filings must be made in the real
estate records office of the county where the manufactured  home is located.  In
some cases, a security interest in the manufactured home will be governed by the
certificate of title laws or the UCC, and the notation of the security  interest
on the  certificate of title or the filing of a UCC financing  statement will be
effective  to maintain the  priority of the  seller's  security  interest in the
manufactured home. If, however,  a manufactured home is permanently  attached to
its site or if a court  determines  that a  manufactured  home is real property,
other parties could obtain an interest in the  manufactured  home which is prior
to the security interest  originally  retained by the mortgage collateral seller
and  transferred  to the  depositor.  In  certain  cases,  the  servicer  or the
subservicer,  as applicable,  may be required to perfect a security  interest in
the  manufactured  home under  applicable  real estate laws.  If the real estate
recordings  are not required and if any of the  foregoing  events were to occur,
the  only  recourse  of the  related  certificateholders  would be  against  the
mortgage  collateral  seller  under  its  repurchase  obligation  for  breach of
representations or warranties.

     The depositor will assign its security  interests in the manufactured homes
to the  trustee on behalf of the  certificateholders.  See  "Description  of the
Securities--Assignment   of  Loans"  in  this  prospectus.   If  stated  in  the
accompanying  prospectus  supplement,  if a manufactured home is governed by the
applicable motor vehicle laws of the relevant state the depositor or the trustee
will amend the  certificates of title to identify the trustee as the new secured
party.  In  most  cases  however,  if a  manufactured  home is  governed  by the
applicable  motor  vehicle laws of the relevant  state neither the depositor nor
the trustee will amend the  certificates of title to identify the trustee as the
new secured  party.  Accordingly,  the  depositor  or any other entity as may be
specified in the prospectus  supplement will continue to be named as the secured
party on the certificates of title relating to the manufactured homes.  However,
there exists a risk that, in the absence of an amendment to the  certificate  of
title, the assignment of the security interest may not be held effective against
subsequent  purchasers of a manufactured  home or subsequent  lenders who take a
security interest in the manufactured home or creditors of the assignor.

     If the owner of a  manufactured  home  moves it to a state  other  than the
state in which the  manufactured  home  initially is registered and if steps are
not taken to re-perfect the trustee's security interest in the state, the


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security interest in the manufactured home will cease to be perfected.  While in
many  circumstances  the trustee would have the  opportunity  to re-perfect  its
security interest in the manufactured home in the state of relocation, there can
be no assurance that the trustee will be able to do so.

     When a mortgagor under a manufactured housing contract sells a manufactured
home,  the trustee,  the  subservicer  or the servicer on behalf of the trustee,
must surrender  possession of the certificate of title or will receive notice as
a result of its lien noted thereon and  accordingly  will have an opportunity to
require satisfaction of the related lien before release of the lien. The ability
to  accelerate  the  maturity  of  the  related  contract  will  depend  on  the
enforceability  under  state  law  of  the  clause  permitting  acceleration  on
transfer.  The Garn-St.  Germain  Depository  Institutions Act of 1982 preempts,
subject to certain exceptions and conditions, state laws prohibiting enforcement
of these clauses applicable to manufactured  homes. To the extent the exceptions
and  conditions  apply in some  states,  the  servicer  may be  prohibited  from
enforcing the clause in respect of certain manufactured homes.

     Under  the  laws  of  most  states,   liens  for  repairs  performed  on  a
manufactured  home  take  priority  over  a  perfected  security  interest.  The
applicable  mortgage  collateral  seller typically will represent that it has no
knowledge  of any  liens  for any  manufactured  home  securing  payment  on any
manufactured housing contract. However, the liens could arise at any time during
the term of a  manufactured  housing  contract.  No notice  will be given to the
trustee or  certificateholders if a lien arises and the lien would not give rise
to a  repurchase  obligation  on the part of the party  specified in the related
agreement.

     To the extent  that  manufactured  homes are not  treated as real  property
under applicable  state law,  manufactured  housing  contracts in most cases are
"chattel  paper" as  defined  in the UCC in  effect  in the  states in which the
manufactured homes initially were registered. Under the UCC, the sale of chattel
paper is treated in a manner  similar to  perfection  of a security  interest in
chattel paper. Under the related agreement, the servicer, the subservicer or the
depositor,  as the  case  may  be,  will  transfer  physical  possession  of the
manufactured housing contracts to the trustee or its custodian. In addition, the
servicer  or the  subservicer  will make an  appropriate  filing of a  financing
statement in the appropriate states to give notice of the trustee's ownership of
the manufactured  housing  contracts.  If stated in the accompanying  prospectus
supplement,  the  manufactured  housing  contracts  will be  stamped  or  marked
otherwise to reflect their assignment from the depositor to the trustee. In most
cases however,  the manufactured housing contracts will not be stamped or marked
otherwise  to  reflect  their  assignment  from the  depositor  to the  trustee.
Therefore,  if a subsequent  purchaser were able to take physical  possession of
the  manufactured  housing  contracts  without  notice  of the  assignment,  the
trustee's interest in the manufactured housing contracts could be defeated. Even
if unsuccessful, these claims could delay payments to the related trust fund and
certificateholders.  If  successful,  losses  to  the  related  trust  fund  and
certificateholders  also could result. To the extent that manufactured homes are
treated as real property under applicable  state law,  contracts will be treated
in a manner similar to that described above with regard to mortgage  loans.  See
"--The mortgage loans" in this prospectus.

     Land  Home and  Land-in-Lieu  Contracts.  To the  extent  described  in the
applicable  prospectus  supplement,  the related  contract pool may contain land
home  contracts  or  land-in-lieu  contracts.  The land home  contracts  and the
land-in-lieu  contracts  will be secured by either  first  mortgages or deeds of
trust,  depending  upon the  prevailing  practice  in the  state  in  which  the
underlying property is located. See "Certain Legal Aspects of the Mortgage Loans
and  Contracts--The  Mortgage  Loans" for a description  of mortgages,  deeds of
trust and foreclosure procedures.

     Enforcement of Security Interests in Manufactured Homes. The subservicer or
the  servicer on behalf of the  trustee,  to the extent  required by the related
agreement,  may take  action to enforce  the  trustee's  security  interest  for
manufactured  housing  contracts  in  default  by  repossession  and sale of the
manufactured homes securing the defaulted  manufactured  housing  contracts.  So
long as the  manufactured  home has not  become  subject to real  estate  law, a
creditor in most cases can repossess a manufactured  home securing a contract by
voluntary surrender,  by "self-help"  repossession that is "peaceful" or, in the
absence of voluntary  surrender and the ability to repossess  without  breach of
the peace,  by judicial  process.  The UCC and consumer  protection laws in most
states place  restrictions  on  repossession  sales,  including  requiring prior
notice to the debtor and  commercial  reasonableness  in effecting the sale. The
debtor  may also  have a right to  redeem  the  manufactured  home at or  before
resale.

     Certain  statutory  provisions,  including federal and state bankruptcy and
insolvency laws and general equitable principles, may limit or delay the ability
of a lender to repossess and resell collateral or enforce a


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<PAGE>

deficiency  judgment.  For a  discussion  of  deficiency  judgments,  see "--The
Mortgage Loans--Anti-Deficiency Legislation and Other Limitations on Lenders" in
this prospectus.

Enforceability of Certain Provisions

     If stated in accompanying  prospectus supplement indicates otherwise,  some
or all of the loans will not contain due-on-sale clauses. In most cases however,
all of the loans will contain  due-on-sale  clauses.  These  clauses  permit the
lender to accelerate the maturity of the loan if the borrower  sells,  transfers
or conveys  the  property.  The  enforceability  of these  clauses  has been the
subject of  legislation  or  litigation  in many  states,  and in some cases the
enforceability of these clauses has been limited or denied. However, the Garn-St
Germain  Depository  Institutions Act of 1982, or Garn-St Germain Act,  preempts
state  constitutional,  statutory and case law that prohibit the  enforcement of
due-on-sale  clauses and permits  lenders to enforce these clauses in accordance
with their terms,  subject to limited  exceptions.  The Garn-St Germain Act does
"encourage"  lenders  to  permit  assumption  of loans at the  original  rate of
interest  or at some other rate less than the average of the  original  rate and
the market rate.

     The Garn-St Germain Act also sets forth nine specific  instances in which a
mortgage  lender  covered  by  the  Garn-St  Germain  Act  may  not  exercise  a
due-on-sale  clause,  regardless of the fact that a transfer of the property may
have  occurred.  These  include  intra-family  transfers,  certain  transfers by
operation of law,  leases of fewer than three years and the creation of a junior
encumbrance. Regulations promulgated under the Garn-St Germain Act also prohibit
the  imposition of a prepayment  penalty on the  acceleration  of a loan under a
due-on-sale clause.

     The inability to enforce a due-on-sale  clause may result in a loan bearing
an interest rate below the current market rate being assumed by a new home buyer
rather than being paid off,  which may have an impact on the average life of the
loans and the number of loans which may be outstanding until maturity.

     On foreclosure,  courts have imposed general  equitable  principles.  These
equitable  principles are designed to relieve the borrower from the legal effect
of its defaults  under the loan  documents.  Examples of judicial  remedies that
have been fashioned  include  judicial  requirements  that the lender  undertake
affirmative  and expensive  actions to determine  the causes for the  borrower's
default and the likelihood that the borrower will be able to reinstate the loan.
In some cases,  courts have  required  that  lenders  reinstate  loans or recast
payment  schedules in order to  accommodate  borrowers  who are  suffering  from
temporary financial disability. In other cases, courts have limited the right of
the lender to foreclose  if the default  under the  mortgage  instrument  is not
monetary,  including the borrower  failing to adequately  maintain the property.
Finally, some courts have been faced with the issue of whether or not federal or
state  constitutional  provisions  reflecting due process  concerns for adequate
notice  require  that  borrowers  under deeds of trust,  deeds to secure debt or
mortgages receive notices in addition to the statutorily prescribed minimum. For
the most part, these cases have upheld the notice provisions as being reasonable
or have found that the sale by a trustee under a deed of trust,  or under a deed
to  secure  a debt or a  mortgagee  having a power  of  sale,  does not  involve
sufficient state action to afford constitutional protections to the borrower.

Consumer Protection Laws

     Numerous  federal and state consumer  protection  laws impose  requirements
applicable to the origination of loans,  including the Truth in Lending Act, the
Federal  Trade  Commission  Act,  the Fair Credit  Billing  Act, the Fair Credit
Reporting  Act,  the Equal  Credit  Opportunity  Act,  the Fair Debt  Collection
Practices Act and the Uniform Consumer Credit Code. In the case of some of these
laws, the failure to comply with their provisions may affect the  enforceability
of the related loan.

     If the transferor of a consumer credit contract is also the seller of goods
that give rise to the  transaction,  and, in certain cases,  related lenders and
assignees,  the  "Holder-in-Due-Course"  rule of the Federal Trade Commission is
intended to defeat the ability of the  transferor  to transfer the contract free
of  notice of claims by the  debtor  thereunder.  The  effect of this rule is to
subject the assignee of the contract to all claims and defenses  that the debtor
could assert against the seller of goods.  Liability  under this rule is limited
to amounts  paid under a contract;  however,  the  borrower  also may be able to
assert the rule to set off  remaining  amounts due as a defense  against a claim
brought against the borrower.

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<PAGE>

Applicability of Usury Laws

     Title V of the Depository  Institutions  Deregulation  and Monetary Control
Act of 1980, or Title V, provides that state usury  limitations  shall not apply
to some types of residential first mortgage loans,  including  Cooperative Loans
originated  by some  lenders.  Title V also  provides  that,  subject to certain
conditions,  state usury limitations shall not apply to any loan that is secured
by a first lien on certain kinds of manufactured housing.  Title V also provides
that,  subject to the following  conditions,  state usury  limitations shall not
apply to any home  improvement  contract that is secured by a first lien on some
kinds of consumer  goods.  The  contracts  would be covered if they satisfy some
conditions,  among other things,  governing the terms of any  prepayments,  late
charges  and  deferral  fees and  requiring  a  30-day  notice  period  prior to
instituting any action leading to repossession of the related unit.

     Title V authorized any state to reimpose  limitations on interest rates and
finance  charges  by  adopting  before  April  1,  1983 a law or  constitutional
provision that expressly rejects  application of the federal law. Fifteen states
adopted  this type of prior to the April 1, 1983  deadline.  In  addition,  even
where Title V was not so rejected, any state is authorized by the law to adopt a
provision limiting discount points or other charges on loans covered by Title V.

     Usury limits apply to junior mortgage loans in many states.  Any applicable
usury limits in effect at origination  will be reflected in the maximum interest
rates for the  mortgage  loans,  as  described  in the  accompanying  prospectus
supplement.

     In most cases,  each seller of a loan will have  represented  that the loan
was originated in compliance  with then applicable  state laws,  including usury
laws, in all material respects. However, the interest rates on the loans will be
subject to applicable usury laws as in effect from time to time.

Environmental Legislation

     Under the federal Comprehensive  Environmental  Response,  Compensation and
Liability  Act of 1980,  as  amended,  or  CERCLA,  and under  state law in some
states,  a secured party which takes a deed-in-lieu of foreclosure,  purchases a
mortgaged  property at a foreclosure sale, or operates a mortgaged  property may
become  liable in some  circumstances  for the costs of  cleaning  up  hazardous
substances  regardless of whether they have  contaminated  the property.  CERCLA
imposes  strict,  as well as joint and several,  liability on several classes of
potentially  responsible parties,  including current owners and operators of the
property  who did not cause or  contribute  to the  contamination.  Furthermore,
liability  under CERCLA is not limited to the original or unamortized  principal
balance of a loan or to the value of the property  securing a loan.  Lenders may
be held liable under  CERCLA as owners or operators  unless they qualify for the
secured creditor exemption to CERCLA. This exemption exempts from the definition
of owners and operators those who, without  participating in the management of a
facility,  hold indicia of ownership primarily to protect a security interest in
the facility.

     The Asset Conservation, Lender Liability and Deposit Insurance Act of 1996,
as amended, or the Conservation Act, amended, among other things, the provisions
of  CERCLA  for  lender  liability  and  the  secured  creditor  exemption.  The
Conservation  Act offers  substantial  protection  to lenders  by  defining  the
activities  in which a lender  can  engage  and still  have the  benefit  of the
secured creditor  exemption.  For a lender to be deemed to have  participated in
the management of a mortgaged property,  the lender must actually participate in
the operational affairs of the mortgaged property. The Conservation Act provides
that "merely having the capacity to influence,  or unexercised right to control"
operations does not constitute  participation in management.  A lender will lose
the  protection  of  the  secured  creditor   exemption  only  if  it  exercises
decision-making  control  over  the  mortgagor's  environmental  compliance  and
hazardous  substance  handling and  disposal  practices,  or assumes  day-to-day
management of substantially all operational functions of the mortgaged property.
The  Conservation  Act also  provides  that a lender  will  continue to have the
benefit of the secured  creditor  exemption even if it forecloses on a mortgaged
property,  purchases  it at a  foreclosure  sale or  accepts a  deed-in-lieu  of
foreclosure provided that the lender seeks to sell the mortgaged property at the
earliest  practicable  commercially  reasonable time on commercially  reasonable
terms.

     Other federal and state laws in some  circumstances may impose liability on
a secured party which takes a deed-in-lieu of foreclosure, purchases a mortgaged
property


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<PAGE>

at a foreclosure  sale, or operates a mortgaged  property on which  contaminants
other  than  CERCLA  hazardous  substances  are  present,  including  petroleum,
agricultural chemicals, hazardous wastes, asbestos, radon, and lead-based paint.
These  cleanup costs may be  substantial.  It is possible that the cleanup costs
could  become  a  liability  of  a  trust  and  reduce  the  amounts   otherwise
distributable to the holders of the related series of securities. Moreover, some
federal  statutes and some states by statute impose an  Environmental  Lien. All
subsequent  liens on that property are usually  subordinated to an Environmental
Lien  and,  in some  states,  even  prior  recorded  liens are  subordinated  to
Environmental  Liens. In the latter states, the security interest of the trustee
in a related  parcel of real property that is subject to an  Environmental  Lien
could be adversely affected.

     Traditionally,  many  residential  mortgage lenders have not taken steps to
evaluate whether  contaminants  are present for any mortgaged  property prior to
the  origination of the loan or prior to foreclosure or accepting a deed-in-lieu
of  foreclosure.  Neither the depositor nor any servicer or subservicer  will be
required  by any  agreement  to  undertake  any of  these  evaluations  prior to
foreclosure or accepting a deed-in-lieu of  foreclosure.  The depositor does not
make any  representations  or warranties or assume any liability for the absence
or effect of  contaminants on any mortgaged  property or any casualty  resulting
from the  presence  or effect of  contaminants.  However,  the  servicer  or the
subservicer  will not be obligated to  foreclose  on any  mortgaged  property or
accept a deed-in-lieu  of  foreclosure  if it knows or reasonably  believes that
there are material  contaminated  conditions  on the  property.  A failure so to
foreclose may reduce the amounts otherwise  available to  certificateholders  of
the related series.

     If stated in the applicable  prospectus  supplement,  at the time the loans
were originated,  an environmental  assessment of the mortgaged  properties will
have  been  conducted.  In most  cases  however,  at the  time  the  loans  were
originated, no environmental assessment or a very limited environment assessment
of the mortgaged properties will have been conducted.

Soldiers' and Sailors' Civil Relief Act of 1940

     Under the terms of the Relief Act a borrower  who enters  military  service
after the  origination of the borrower's  loan,  including a borrower who was in
reserve  status and is called to active duty after  origination of the loan, may
not be charged interest,  including fees and charges, above an annual rate of 6%
during the period of the  borrower's  active duty status,  unless a court orders
otherwise on application of the lender.  The Relief Act applies to borrowers who
are members of the Air Force, Army, Marines,  Navy, National Guard,  Reserves or
Coast Guard,  and officers of the U.S.  Public Health  Service  assigned to duty
with the military.

     Because the Relief Act applies to  borrowers  who enter  military  service,
including  reservists  who are called to active duty,  after  origination of the
related loan, no information  can be provided as to the number of loans that may
be affected by the Relief Act. For loans included in a trust, application of the
Relief Act would  adversely  affect,  for an  indeterminate  period of time, the
ability of the  subservicer  or the  servicer,  as  applicable,  to collect full
amounts  of  interest  on the  loans.  Any  shortfall  in  interest  collections
resulting  from the  application  of the Relief Act or  similar  legislation  or
regulations, which would not be recoverable from the related loans, would result
in a  reduction  of the  amounts  distributable  to the  holders of the  related
securities,  and  would  not be  covered  by  Advances  or any  form  of  credit
enhancement  provided in connection  with the related series of  securities.  In
addition,  the Relief Act imposes  limitations  that would impair the ability of
the subservicer or the servicer, as applicable, to foreclose on an affected loan
during  the  mortgagor's   period  of  active  duty  status,   and,  under  some
circumstances,  during an additional three month period thereafter. Thus, if the
Relief Act or similar  legislation or regulations applies to any loan which goes
into  default,  there  may be  delays  in  payment  and  losses  on the  related
securities in connection therewith. Any other interest shortfalls,  deferrals or
forgiveness  of payments on the loans  resulting  from  similar  legislation  or
regulations may result in delays in payments or losses to  certificateholders of
the related series.

Default Interest and Limitations on Prepayments

     Notes and  mortgages may contain  provisions  that obligate the borrower to
pay a late charge or additional interest if payments are not timely made, and in
some  circumstances,  may prohibit  prepayments  for a specified  period  and/or
condition  prepayments  on the  borrower's  payment of prepayment  fees or yield
maintenance penalties.  In some states, there are or may be specific limitations
on the late charges  which a lender may collect  from a borrower for  delinquent
payments.  Some states also limit the amounts  that a lender may collect  from a
borrower  as an  additional  charge if the loan is  prepaid.  In  addition,  the
enforceability of provisions that provide for prepayment


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fees or penalties on an involuntary prepayment is unclear under the laws of many
states. Most conventional single-family mortgage loans may be prepaid in full or
in part without penalty. The regulations of the Federal Home Loan Bank Board, as
succeeded  by the OTS,  prohibit  the  imposition  of a  prepayment  penalty  or
equivalent fee for or in connection with the  acceleration of a loan by exercise
of a  due-on-sale  clause.  A mortgagee  to whom a  prepayment  in full has been
tendered  may be  compelled  to give  either a  release  of the  mortgage  or an
instrument  assigning  the  existing  mortgage.  The absence of a  restraint  on
prepayment,  particularly  for  mortgage  loans  having  higher loan rates,  may
increase  the  likelihood  of  refinancing  or other  early  retirements  of the
mortgage loans.

Forfeitures in Drug and RICO Proceedings

     Federal  law  provides  that  property   owned  by  persons   convicted  of
drug-related  crimes or of criminal  violations of the Racketeer  Influenced and
Corrupt  Organizations,  or RICO statute can be seized by the  government if the
property was used in, or purchased  with the  proceeds of, those  crimes.  Under
procedures  contained  in the  Comprehensive  Crime  Control  Act of  1984,  the
government may seize the property even before  conviction.  The government  must
publish notice of the  forfeiture  proceeding and may give notice to all parties
"known to have an alleged  interest in the  property,"  including the holders of
mortgage loans.

     A lender  may  avoid  forfeiture  of its  interest  in the  property  if it
establishes that:

o    its mortgage was executed and recorded  before  commission  of the crime on
     which the forfeiture is based; or

o    the lender  was,  at the time of  execution  of the  mortgage,  "reasonably
     without cause to believe" that the property was used in, or purchased  with
     the proceeds of, illegal drug or RICO activities.

Negative Amortization Loans

     A recent case held that state  restrictions  on the compounding of interest
are not preempted by the provisions of the depository Institutions  Deregulation
and Monetary  Control Act of 1980,  or DIDMC,  and as a result,  a mortgage loan
that provided for negative  amortization  violated New  Hampshire's  requirement
that first  mortgage  loans  provide  for  computation  of  interest on a simple
interest basis.  The court did not address the  applicability of the Alternative
Mortgage  Transaction  Parity  Act of 1982,  which  authorizes  a lender to make
residential mortgage loans that provide for negative amortization.  As a result,
the  enforceability  of compound  interest on  mortgage  loans that  provide for
negative  amortization  is  unclear.  The case,  which was  decided by the First
Circuit Court of Appeals,  is binding  authority only on Federal District Courts
in Maine, New Hampshire, Massachusetts, Rhode Island and Puerto Rico.

                    Material Federal Income Tax Consequences

General

     The following is a discussion of the material,  and certain other,  federal
income tax  consequences  of the  purchase,  ownership  and  disposition  of the
securities. Where appropriate,  additional consequences will be discussed in the
prospectus  supplement  relating to a  particular  series.  This  discussion  is
intended  as an  explanatory  discussion  of the  consequences  of  holding  the
securities  generally and does not purport to furnish information with the level
of detail  that  would be  expected  to be  provided  by an  investor's  own tax
advisor,  or with  consideration  of an investor's  specific tax  circumstances.
Accordingly,  it is recommended that each prospective  investor consult with its
own tax advisor  regarding the  application  of United States federal income tax
laws,  as well as any  state,  local,  foreign  or  other  tax  laws,  to  their
particular  situation.  Orrick,  Herrington  &  Sutcliffe  LLP,  counsel  to the
depositor,  rendered an opinion generally that the discussion in this section is
correct in all material  respects.  In addition,  counsel to the  depositor  has
rendered an opinion to the effect that: (1) with respect to each series of REMIC
or FASIT  certificates,  issued as described in this  prospectus and the related
prospectus  supplement,  the related mortgage pool, or portion thereof,  will be
classified as one or more REMICs or FASITs and not an  association  taxable as a
corporation - or publicly traded partnership treated as a corporation - and each
class of securities will represent  either a "regular"  interest or a "residual"
interest  in the REMIC or FASIT and (2) with  respect  to each  other  series of
securities, issued

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<PAGE>

as described  in this  prospectus  and the related  prospectus  supplement,  the
related trust fund will be a grantor  trust for federal  income tax purposes and
not an  association  taxable as a corporation - or publicly  traded  partnership
treated as a  corporation  - and each  holder of a  security  will be treated as
holding an equity interest in that grantor trust.  Prospective  investors should
be aware that counsel to the  depositor has not rendered any other tax opinions.
Further,  if with  respect  to any series of  securities  Orrick,  Herrington  &
Sutcliffe LLP is not counsel to the depositor,  depositor's then current counsel
will be  identified  in the related  prospectus  supplement  and will confirm or
supplement the aforementioned opinions.  Prospective investors should be further
aware that no rulings have been sought from the Internal Revenue Service,  known
as the IRS,  and that legal  opinions  are not binding on the IRS or the courts.
Accordingly,  there can be no  assurance  that the IRS or the courts  will agree
with counsel to the depositor's  opinions.  If, contrary to those opinions,  the
trust fund related to a series of  securities is  characterized  or treated as a
corporation  for federal  income tax purposes,  among other  consequences,  that
trust fund would be subject to federal  income tax and similar  state  income or
franchise  taxes on its income and  distributions  to holders of the  securities
could be impaired.

     The following summary is based on the Code as well as Treasury  regulations
and administrative and judicial rulings and practice. Legislative,  judicial and
administrative  changes may occur,  possibly with retroactive effect, that could
alter or modify the continued  validity of the  statements and  conclusions  set
forth in this  prospectus.  This summary does not purport to address all federal
income tax matters that may be relevant to particular holders of securities. For
example, it generally is addressed only to original purchasers of the securities
that are United States  investors,  deals only with  securities  held as capital
assets within the meaning of Section 1221 of the Code,  and does not address tax
consequences  to holders  that may be relevant to  investors  subject to special
rules,  such as  non-U.S.  investors,  banks,  insurance  companies,  tax-exempt
organizations,  electing large partnership, dealers in securities or currencies,
mutual funds, REITs, S corporations, estates and trusts, investors that hold the
securities as part of a hedge, straddle,  integrated or conversion  transaction,
or holders whose "functional currency" is not the United States dollar. Further,
it does not address alternative minimum tax consequences or the indirect effects
on the holders of equity  interests in any entity that is a beneficial  owner of
the securities. Further, this discussion does not address the state or local tax
consequences of the purchase,  ownership and disposition of those securities. It
is recommended that investors  consult their own tax advisors in determining the
federal,  state,  local,  or other  tax  consequences  to them of the  purchase,
ownership and  disposition of the securities  offered under this  prospectus and
the related prospectus supplement.

     The   following   discussion   addresses   REMIC  and  FASIT   certificates
representing  interests in a trust for which the transaction  documents  require
the making of an election to have the trust, or a portion thereof, be treated as
one or more  REMICs  or  FASITs  and  grantor  trust  certificates  representing
interests  in a grantor  trust.  The  prospectus  supplement  for each series of
securities will indicate  whether a REMIC or FASIT election or elections will be
made for the  related  trust  fund and,  if that  election  is to be made,  will
identify all "regular  interests"  and "residual  interests" in the REMIC or the
"regular interests" and "high yield regular interests" in the FASIT, as the case
may be. If  interests  in a FASIT  ownership  interest  are offered for sale the
federal income consequences of the purchase,  ownership and disposition of those
interests  will be  described in the  accompanying  prospectus  supplement.  For
purposes  of this  tax  discussion,  references  to a  "certificateholder"  or a
"holder" are to the beneficial owner of a certificate.

     Regulations specifically addressing certain of the issues discussed in this
prospectus  have not been issued or have been  issued only in proposed  form and
this discussion is based in part on regulations  that do not adequately  address
some  issues  relevant  to,  and in some  instances  provide  that  they are not
applicable to, securities similar to the securities.

Classification of REMICs and FASITs

     Upon the  issuance of each series of REMIC or FASIT  certificates,  Orrick,
Herrington & Sutcliffe LLP,  counsel to the depositor,  will deliver its opinion
to the effect  that,  assuming  compliance  with all  provisions  of the related
pooling and servicing agreement, or trust agreement,  the related trust fund, or
each  applicable  portion of the related trust fund,  will qualify as a REMIC or
FASIT,  as the case may be, and the  certificates  offered with respect  thereto
will be considered to be, or evidence the ownership of, "regular  interests," in
the  related  REMIC  or  FASIT  or,  solely  in the  case of  REMICs,  "residual
interests," in that REMIC. If with respect to any series,  Orrick,  Herrington &
Sutcliffe LLP is not counsel to the depositor, then depositor's counsel for such
series will be identified

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<PAGE>

in the related  prospectus  supplement  and will  confirm,  or  supplement,  the
aforementioned  opinions.  Opinions of counsel only  represent the views of that
counsel and are not binding on the IRS or the courts. Accordingly,  there can be
no assurance that the IRS and the courts will not take a differing position.

     The IRS  published  proposed  Treasury  regulations,  known as the Proposed
FASIT Regulations, supplementing the FASIT provisions of the Code on February 7,
2000,  but many issues remain  unresolved.  The Proposed FASIT  Regulations  are
subject to change with  potentially  retroactive  effect before being adopted as
final regulations.  The Proposed FASIT Regulations  contain an "anti-abuse" rule
that, among other things,  enables the IRS to disregard a FASIT election,  treat
one or more of the  assets of a FASIT as held by a person  other than the holder
of the ownership  interest in the FASIT, treat a FASIT regular interest as other
than a debt instrument or treat a regular  interest held by any person as having
the tax  characteristics  of one or more of the assets  held by the FASIT,  if a
principal  purpose  of  forming  or  using  the  FASIT  was to  achieve  results
inconsistent  with the intent of the FASIT  provisions  and the  Proposed  FASIT
Regulations  based on all the facts and  circumstances.  Among the  requirements
that the Proposed FASIT Regulations state for remaining within the intent of the
FASIT  provisions  is that no FASIT  provision  be used to obtain a federal  tax
result that could not be obtained  without the use of that provision  unless the
provision  clearly  contemplates  that result.  The only general intent that the
Proposed FASIT  Regulations  attribute to the FASIT provisions is to promote the
spreading   of  credit  risk  on  debt   instruments   by   facilitating   their
securitization.  The "anti-abuse"  provisions of the Proposed FASIT  Regulations
are proposed to be  effective  as of February 4, 2000.  Although any FASIT whose
certificates  are offered  pursuant to this  prospectus  will be  structured  to
reduce the likelihood that the IRS would recharacterize the tax treatment of the
offered   certificates,   the  anti-abuse   provisions  of  the  Proposed  FASIT
Regulations   are   sufficiently   broad  and  vague  that  the   avoidance   of
recharacterization cannot be assured. Investors should be cautious in purchasing
any  of  the  certificates  and  should  consult  with  their  tax  advisors  in
determining the federal, state, local and other tax consequences to them for the
purchase, holding and disposition of the certificates.

     In  addition,   certain   FASIT   regular   interests,   or  FASIT  Regular
Certificates,  may be treated as "high-yield  regular interests." Special rules,
discussed below apply to those securities.  Although the accompanying prospectus
supplement  will indicate  which FASIT  securities are expected to be treated as
"high-yield  regular  interests,"  in many  cases it will not be clear as of the
date of the prospectus  supplement,  and possibly not even after the issuance of
the securities, whether any particular class will actually be so treated.

     If an entity  electing  to be treated  as a REMIC or FASIT  fails to comply
with one or more of the ongoing  requirements of the Code for that status during
any taxable  year,  the Code  provides  that the entity will not be treated as a
REMIC or FASIT for that year and  thereafter.  In that event,  the entity may be
taxable as a separate  corporation under Treasury  regulations,  and the related
certificates may not be accorded the status or given the tax treatment described
in this prospectus  under "Material  Federal Income Tax  Consequences."  The IRS
may, but is not compelled to provide relief but any relief may be accompanied by
sanctions,  including  the  imposition of a corporate tax on all or a portion of
the trust's income for the period in which the  requirements for that status are
not satisfied. The proposed FASIT regulations provide that, upon the termination
of a FASIT, FASIT regular interest holders are treated as exchanging their FASIT
regular  interests  for  new  interests  in the  trust.  The new  interests  are
characterized under general tax principals, and the deemed exchange of the FASIT
regular  interests  for new interests in the trust may require the FASIT regular
interest holders to recognize gain, but not loss. The resulting  non-FASIT trust
could be characterized  as a partnership or as a publicly traded  partnership or
association  taxable  as  a  corporation,  with  adverse  tax  consequences  for
investors. The pooling and servicing agreement, indenture or trust agreement for
each REMIC or FASIT will  include  provisions  designed to maintain  the related
trust fund's status as a REMIC or FASIT. It is not  anticipated  that the status
of any trust fund as a REMIC or FASIT will be  terminated,  but, as noted in the
discussion of the FASIT  "anti-abuse"  provisions  above,  it is not possible to
assure against recharacterization of a FASIT by the IRS.

Taxation of Owners of REMIC and FASIT Regular Certificates

     General. In general,  REMIC and FASIT Regular  Certificates will be treated
for  federal  income  tax  purposes  as debt  instruments  and not as  ownership
interests  in the REMIC or FASIT or its  assets.  Moreover,  holders  of Regular
Certificates that otherwise report income under a cash method of accounting will
be required to report income for Regular Certificates under an accrual method.

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<PAGE>

     Original Issue Discount.  Some REMIC or FASIT Regular  Certificates  may be
issued with  "original  issue  discount," or OID,  within the meaning of Section
1273(a) of the Code.  Any holders of Regular  Certificates  issued with original
issue discount  typically will be required to include original issue discount in
income as it accrues,  in accordance with the method described below, in advance
of the receipt of the cash  attributable  to that income.  In addition,  Section
1272(a)(6) of the Code provides special rules applicable to Regular Certificates
and  certain  other  debt  instruments  issued  with  original  issue  discount.
Regulations have not been issued under that section.

     The Code requires that a prepayment  assumption be used for loans held by a
REMIC or FASIT in computing  the accrual of original  issue  discount on Regular
Certificates  issued by that issuer,  and that adjustments be made in the amount
and rate of accrual of the  discount to reflect  differences  between the actual
prepayment rate and the prepayment  assumption.  The prepayment assumption is to
be determined in a manner  prescribed in Treasury  regulations;  as noted above,
those  regulations  have  not  been  issued.  The  conference  committee  report
accompanying  the Tax Reform Act of 1986  indicates  that the  regulations  will
provide that the prepayment  assumption used for a Regular  Certificate  must be
the  same  as  that  used  in  pricing  the  initial  offering  of  the  Regular
Certificate. The prepayment assumption used by the servicer, the subservicer, or
the REMIC or FASIT  administrator,  as applicable,  in reporting  original issue
discount for each series of Regular  Certificates  will be consistent  with this
standard  and  will be  disclosed  in the  accompanying  prospectus  supplement.
However, none of the depositor, the REMIC or FASIT administrator, as applicable,
or the servicer or subservicer will make any representation  that the loans will
in fact prepay at a rate conforming to the prepayment assumption or at any other
rate.

     The  original  issue  discount,  if  any,  on  a  REMIC  or  FASIT  Regular
Certificate  will be the excess of its stated  redemption price at maturity over
its issue price. The issue price of a particular  class of Regular  Certificates
will  be the  first  cash  price  at  which  a  substantial  amount  of  Regular
Certificates of that class is sold, excluding sales to bond houses,  brokers and
underwriters. If less than a substantial amount of a particular class of Regular
Certificates is sold for cash on or prior to the date of their initial issuance,
or the closing date,  the issue price for that class will be treated as the fair
market value of the class on the closing date.  Under the OID  regulations,  the
stated redemption price of a REMIC or FASIT Regular  Certificate is equal to the
total of all  payments  to be made on that  certificate  other  than  "qualified
stated   interest."   Qualified  stated  interest   includes  interest  that  is
unconditionally payable at least annually at a single fixed rate, or in the case
of  a  variable  rate  debt  instrument,  at a  "qualified  floating  rate,"  an
"objective  rate,"  a  combination  of a  single  fixed  rate  and  one or  more
"qualified  floating  rates"  or one  "qualified  inverse  floating  rate," or a
combination of "qualified floating rates" that in most cases does not operate in
a manner that accelerates or defers interest payments on a Regular Certificate.

     In the case of Regular  Certificates bearing adjustable interest rates, the
determination  of the total amount of original  issue discount and the timing of
the  inclusion  of the  original  issue  discount  will  vary  according  to the
characteristics  of the Regular  Certificates.  If the original  issue  discount
rules apply to the  certificates,  the accompanying  prospectus  supplement will
describe  the manner in which the rules will be  applied  by the  servicer,  the
subservicer,  or  REMIC  or  FASIT  administrator,   as  applicable,  for  those
certificates in preparing information returns to the  certificateholders and the
IRS.

     Some classes of the Regular Certificates may provide for the first interest
payment with respect to their  certificates to be made more than one month after
the date of  issuance,  a period  which is longer  than the  subsequent  monthly
intervals between interest  payments.  Assuming the "accrual period," as defined
below, for original issue discount is each monthly period that begins or ends on
a distribution date, in some cases, as a consequence of this "long first accrual
period,"  some or all  interest  payments  may be required to be included in the
stated redemption price of the Regular Certificate and accounted for as original
issue discount.  Because interest on Regular  Certificates  must in any event be
accounted for under an accrual  method,  applying this analysis  would result in
only a slight  difference  in the timing of the inclusion in income of the yield
on the Regular Certificates.

     In addition,  if the accrued interest to be paid on the first  distribution
date is computed for a period that begins  prior to the closing  date, a portion
of the purchase  price paid for a Regular  Certificate  will reflect the accrued
interest. In these cases,  information returns to the certificateholders and the
IRS will be based on the position  that the portion of the  purchase  price paid
for the  interest  accrued for periods  prior to the closing  date is treated as
part of the overall cost of the Regular Certificate, and not as a separate asset
the cost of which is  recovered  entirely  out of interest  received on the next
distribution  date,  and  that  portion  of  the  interest  paid  on  the  first
distribution date in


                                       76
<PAGE>

excess of interest  accrued for a number of days  corresponding to the number of
days from the closing date to the first  distribution date should be included in
the  stated  redemption  price  of the  Regular  Certificate.  However,  the OID
regulations  state  that all or some  portion  of the  accrued  interest  may be
treated  as a  separate  asset the cost of which is  recovered  entirely  out of
interest paid on the first  distribution  date. It is unclear how an election to
do so would be made under the OID regulations and whether that election could be
made unilaterally by a certificateholder.

     Regardless of the general  definition of original issue discount,  original
issue discount on a Regular  Certificate  will be considered to be de minimis if
it is less than 0.25% of the stated redemption price of the Regular  Certificate
multiplied by its weighted average life. For this purpose,  the weighted average
life  of  the  Regular  Certificate  is  computed  as the  sum  of  the  amounts
determined,  as to each payment  included in the stated  redemption price of the
Regular Certificate, by multiplying:

o    the number of complete  years,  rounding down for partial  years,  from the
     issue date until the payment is expected to be made, presumably taking into
     account the prepayment assumption;

           by

o    a fraction,  the  numerator of which is the amount of the payment,  and the
     denominator  of which is the stated  redemption  price at  maturity  of the
     Regular Certificate.

Under the OID regulations,  original issue discount of only a de minimis amount,
other  than de minimis  original  issue  discount  attributable  to a  so-called
"teaser"  interest  rate or an initial  interest  holiday,  will be  included in
income as each payment of stated  principal is made, based on the product of the
total  amount of the de minimis  original  issue  discount  and a fraction,  the
numerator of which is the amount of the principal payment and the denominator of
which is the outstanding stated principal amount of the Regular Certificate. The
OID  regulations  also would  permit a  certificateholder  to elect to accrue de
minimis  original issue discount into income currently based on a constant yield
method.  See "--Market  Discount" in this  prospectus  for a description of that
election under the OID regulations.

     If original  issue  discount on a Regular  Certificate is in excess of a de
minimis  amount,  the holder of the  certificate  must include in ordinary gross
income the sum of the "daily  portions" of original  issue discount for each day
during its taxable year on which it held the Regular Certificate,  including the
purchase  date but excluding  the  disposition  date. In the case of an original
holder of a Regular  Certificate,  the daily portions of original issue discount
will be determined as follows.

     The "accrual period" as used in this section will be:

o    the period that begins or ends on a date that corresponds to a distribution
     date and  begins on the  first  day  following  the  immediately  preceding
     accrual period,  or in the case of the first accrual period,  begins on the
     closing date; or

o    such other period as described in the related prospectus supplement.

As to each  accrual  period,  a  calculation  will be made of the portion of the
original issue discount that accrued during that accrual period.  The portion of
original  issue  discount  that  accrues in any  accrual  period  will equal the
excess, if any, of:

       (1) the sum of:

o    the  present  value,  as of the end of the  accrual  period,  of all of the
     distributions  remaining to be made on the Regular Certificate,  if any, in
     future periods; and

o    the distributions made on the Regular Certificate during the accrual period
     of amounts included in the stated redemption price;

           over

      (2)  the  adjusted  issue  price  of  the  Regular   Certificate  at  the
           beginning of the accrual period.

     The  present  value  of  the  remaining  distributions  referred  to in the
preceding sentence will be calculated:



                                       77
<PAGE>

       (1) assuming  that  distributions  on the  Regular  Certificate  will  be
           received in future periods based on the loans being prepaid at a rate
           equal to the prepayment assumption; and

      (2)  using a discount  rate equal to the  original  yield to  maturity of
           the certificate.

For these purposes,  the original yield to maturity of the  certificate  will be
calculated  based on its issue  price and  assuming  that  distributions  on the
certificate will be made in all accrual periods based on the loans being prepaid
at a rate equal to the  prepayment  assumption.  The  adjusted  issue price of a
Regular  Certificate at the beginning of any accrual period will equal the issue
price of the  certificate,  increased by the aggregate  amount of original issue
discount that accrued for that certificate in prior accrual periods, and reduced
by the amount of any  distributions  made on that Regular  Certificate  in prior
accrual periods of amounts included in its stated redemption price. The original
issue discount accruing during any accrual period,  computed as described above,
will be allocated ratably to each day during the accrual period to determine the
daily portion of original issue discount for that day.

     The OID  regulations  suggest that original  issue  discount for securities
that represent multiple  uncertificated  regular  interests,  in which ownership
interests  will be  issued  simultaneously  to the same  buyer  and which may be
required  under the related  pooling and servicing  agreement to be  transferred
together,  should be computed on an aggregate  method. In the absence of further
guidance from the IRS, original issue discount for securities that represent the
ownership of multiple  uncertificated  regular interests will be reported to the
IRS and the  certificateholders on an aggregate method based on a single overall
constant  yield  and  the  prepayment  assumption  stated  in  the  accompanying
prospectus supplement, treating all uncertificated regular interests as a single
debt instrument as set forth in the OID regulations,  so long as the pooling and
servicing  agreement  requires  that the  uncertificated  regular  interests  be
transferred together.

     A  subsequent  purchaser  of  a  Regular  Certificate  that  purchases  the
certificate  at a cost,  excluding  any  portion  of that cost  attributable  to
accrued  qualified  stated interest,  less than its remaining stated  redemption
price will also be required to include in gross income the daily portions of any
original issue discount for that certificate.  However,  each daily portion will
be  reduced,  if the  cost  is in  excess  of its  "adjusted  issue  price,"  in
proportion  to the ratio  that  excess  bears to the  aggregate  original  issue
discount remaining to be accrued on the Regular Certificate.  The adjusted issue
price of a Regular Certificate on any given day equals:

o    the adjusted issue price or, in the case of the first accrual  period,  the
     issue price,  of the  certificate  at the  beginning of the accrual  period
     which includes that day;

           plus

o    the daily  portions  of  original  issue  discount  for all days during the
     accrual period prior to that day;

           minus

o    any principal payments made during the accrual period prior to that day for
     the certificate.

     Market Discount.  A certificateholder  that purchases a Regular Certificate
at a market  discount,  that is,  in the case of a  Regular  Certificate  issued
without  original  issue  discount,  at a purchase price less than its remaining
stated principal  amount,  or in the case of a Regular  Certificate  issued with
original issue discount,  at a purchase price less than its adjusted issue price
will  recognize  income on  receipt  of each  distribution  representing  stated
redemption  price.  In  particular,  under  Section  1276  of  the  Code  such a
certificateholder in most cases will be required to allocate the portion of each
distribution  representing  stated  redemption  price  first to  accrued  market
discount not previously  included in income, and to recognize ordinary income to
that extent.

     A  certificateholder  may  elect  to  include  market  discount  in  income
currently  as it  accrues  rather  than  including  it on a  deferred  basis  in
accordance  with the  foregoing.  If made, the election will apply to all market
discount  bonds acquired by the  certificateholder  on or after the first day of
the first  taxable year to which the  election  applies.  In  addition,  the OID
regulations  permit  a  certificateholder  to  elect  to  accrue  all  interest,
discount, including de minimis market or original issue discount, and premium in
income as interest,  based on a constant yield method. If the election were made
for a Regular Certificate with market discount,  the certificateholder  would be
deemed to have made an election to include  currently  market discount in income
for all other debt instruments having market discount that the certificateholder
acquires during the taxable year of the election or thereafter.

                                       78
<PAGE>

Similarly, a certificateholder that made this election for a certificate that is
acquired at a premium  would be deemed to have made an election to amortize bond
premium  for all debt  instruments  having  amortizable  bond  premium  that the
certificateholder owns or acquires. See "--Premium" in this prospectus.  Each of
these elections to accrue interest,  discount and premium for a certificate on a
constant  yield method or as interest may not be revoked  without the consent of
the IRS.

     However, market discount for a Regular Certificate will be considered to be
de minimis for  purposes of Section  1276 of the Code if the market  discount is
less  than  0.25%  of the  remaining  stated  redemption  price  of the  Regular
Certificate  multiplied  by the number of complete  years to maturity  remaining
after the date of its  purchase.  In  interpreting  a similar  rule for original
issue discount on obligations payable in installments, the OID regulations refer
to the weighted average maturity of obligations,  and it is likely that the same
rule will be applied for market  discount,  presumably  taking into  account the
prepayment  assumption.  If market  discount is treated as de minimis under this
rule, it appears that the actual  discount  would be treated in a manner similar
to  original  issue  discount of a de minimis  amount.  See "--  Original  Issue
Discount"  in this  prospectus.  This  treatment  may result in  discount  being
included  in  income at a slower  rate than  discount  would be  required  to be
included in income using the method described above.

     Section  1276(b)(3)  of  the  Code  specifically  authorizes  the  Treasury
Department to issue  regulations  providing  for the method for accruing  market
discount on debt instruments, the principal of which is payable in more than one
installment.  Until regulations are issued by the Treasury  Department,  certain
rules described in the Committee  Report apply.  The Committee  Report indicates
that in each  accrual  period  market  discount on Regular  Certificates  should
accrue, at the certificateholder's option:

o    on the basis of a constant yield method;

o    in  the  case  of a  Regular  Certificate  issued  without  original  issue
     discount,  in an amount  that bears the same  ratio to the total  remaining
     market  discount as the stated interest paid in the accrual period bears to
     the total  amount of stated  interest  remaining  to be paid on the Regular
     Certificate as of the beginning of the accrual period; or

o    in the case of a Regular  Certificate  issued with original issue discount,
     in an amount  that  bears  the same  ratio to the  total  remaining  market
     discount as the original issue discount accrued in the accrual period bears
     to the total original issue discount  remaining on the Regular  Certificate
     at the beginning of the accrual period.

Moreover,  the prepayment assumption used in calculating the accrual of original
issue  discount is to be used in  calculating  the  accrual of market  discount.
Because the regulations  referred to in this paragraph have not been issued,  it
is not possible to predict what effect those  regulations  might have on the tax
treatment  of a Regular  Certificate  purchased  at a discount in the  secondary
market.

     To the  extent  that  Regular  Certificates  provide  for  monthly or other
periodic  distributions  throughout their term, the effect of these rules may be
to require  market  discount  to be  includible  in income at a rate that is not
significantly slower than the rate at which the discount would accrue if it were
original  issue  discount.  Moreover,  in  any  event  a  holder  of  a  Regular
Certificate in most cases will be required to treat a portion of any gain on the
sale or exchange  of that  certificate  as ordinary  income to the extent of the
market  discount  accrued to the date of disposition  under one of the foregoing
methods,  less any  accrued  market  discount  previously  reported  as ordinary
income.

     In  addition,  under  Section  1277 of the  Code,  a  holder  of a  Regular
Certificate  may be required to defer a portion of its interest  deductions  for
the taxable  year  attributable  to any  indebtedness  incurred or  continued to
purchase or carry a Regular  Certificate  purchased  with market  discount.  For
these  purposes,  the de minimis rule  referred to above  applies.  Any deferred
interest  expense would not exceed the market  discount that accrues during that
taxable year and is, in general,  allowed as a deduction not later than the year
in which the market  discount is includible  in income.  If the holder elects to
include market discount in income currently as it accrues on all market discount
instruments  acquired by that holder in that  taxable  year or  thereafter,  the
interest deferral rule described above will not apply.

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<PAGE>

     Premium. A Regular Certificate  purchased at a cost,  excluding any portion
of that cost attributable to accrued qualified stated interest, greater than its
remaining  stated  redemption  price will be  considered  to be  purchased  at a
premium.  The holder of a Regular Certificate may elect under Section 171 of the
Code to amortize that premium  under the constant  yield method over the life of
the  certificate.  If made,  this  election  will apply to all debt  instruments
having  amortizable bond premium that the holder owns or subsequently  acquires.
Amortizable  premium  will be  treated  as an offset to  interest  income on the
related Regular Certificate,  rather than as a separate interest deduction.  The
OID regulations also permit certificateholders to elect to include all interest,
discount  and  premium  in income  based on a  constant  yield  method,  further
treating the  certificateholder  as having made the election to amortize premium
generally. See "--Market Discount" in this prospectus.  The conference committee
report  states  that the same rules  that  apply to accrual of market  discount,
which  rules will  require use of a  prepayment  assumption  in accruing  market
discount for Regular  Certificates  without regard to whether those certificates
have original issue  discount,  will also apply in amortizing bond premium under
Section 171 of the Code.

     Realized Losses.  Under Section 166 of the Code, both corporate  holders of
the Regular  Certificates and noncorporate  holders of the Regular  Certificates
that acquire those certificates in connection with a trade or business should be
allowed to deduct,  as ordinary  losses,  any losses  sustained during a taxable
year in which their  certificates  become  wholly or partially  worthless as the
result of one or more Realized Losses on the loans.  However,  it appears that a
noncorporate  holder that does not acquire a Regular  Certificate  in connection
with a trade or business will not be entitled to deduct a loss under Section 166
of the Code until the holder's  certificate becomes wholly worthless,  until its
outstanding  principal  balance has been reduced to zero, and that the loss will
be characterized as a short-term capital loss.

     Each holder of a Regular  Certificate  will be required to accrue  interest
and original issue discount for that  certificate,  without giving effect to any
reductions in  distributions  attributable to defaults or  delinquencies  on the
loans  or the  underlying  certificates  until  it can be  established  that any
reduction ultimately will not be recoverable. As a result, the amount of taxable
income  reported  in any  period by the  holder of a Regular  Certificate  could
exceed the amount of  economic  income  actually  realized by the holder in that
period. Although the holder of a Regular Certificate eventually will recognize a
loss or  reduction in income  attributable  to  previously  accrued and included
income that, as the result of a Realized Loss,  ultimately will not be realized,
the law is unclear  with  respect to the  timing  and  character  of the loss or
reduction in income.

     Special Rules for FASIT High-Yield Regular Interests.

     General.  A  high-yield  interest  in a FASIT is a  subcategory  of a FASIT
regular  interest.  A FASIT  high-yield  regular  interest  is a  FASIT  regular
interest that either:

o    has an issue price that exceeds 125% of its stated principal amount;

o    has a yield  to  maturity  equal to or  greater  than a  specified  amount,
     generally 500 basis points above the appropriate applicable federal rate;

o    is  an  interest-only  obligation  whose  interest  payments  consist  of a
     non-varying specified portion of the interest payments on permitted assets.

A holder  of a FASIT  high-yield  regular  interest  is  subject  to  treatment,
described above, applicable to FASIT Regular Interests, generally.

     Limitations  on  Utilization  of Losses.  The holder of a FASIT  high-yield
regular  interest  may not offset its income  derived  thereon by any  unrelated
losses.  Thus,  the  taxable  income of a holder of a FASIT  high-yield  regular
interest  will be at  least  equal  to the  taxable  income  derived  from  that
interest,  which  includes  gain or loss from the sale of those  interests,  any
FASIT  ownership  interests and any excess  inclusion  income derived from REMIC
residual interests. Thus, income from those interests generally cannot be offset
by current net operating losses or net operating loss carryovers. Similarly, the
alternative  minimum  taxable  income  of the  holder  of a  high-yield  regular
interest cannot be less than that holder's taxable income  determined solely for
those interests. For purposes of these provisions,  all members of an affiliated
group filing a consolidated return are treated as one taxpayer. Accordingly, the
consolidated  taxable  income  of the  group  cannot  be less  than the  group's
"tainted"  income,  thereby  preventing losses of one member from offsetting the
tainted income of another member.  However,  to avoid doubly penalizing  income,
net


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<PAGE>

operating loss carryovers are determined  without regard to that income for both
regular tax and alternative minimum tax purposes.

     Transfer  Restrictions.  Transfers of FASIT high-yield Regular Certificates
to certain  "disqualified  holders"  will,  absent the  satisfaction  of certain
conditions,  be disregarded for federal income tax purposes.  In that event, the
most recent eligible holder, generally the transferring holder, will continue to
be taxed as if it were the holder of the certificate,  although the disqualified
holder,  and not the most recent eligible  holder,  would be taxable on any gain
recognized  by that  holder for the  related  interest.  Although  not free from
doubt, the tax ownership of a FASIT high-yield  Regular  Certificate may, absent
the  satisfaction  of certain  conditions,  revert to a prior holder even if the
transferee becomes a disqualified holder after the relevant transfer.

     Each  applicable  pooling  and  servicing  agreement,  trust  agreement  or
indenture  requires,  as a  prerequisite  to any transfer of a FASIT  high-yield
Regular  Certificate,  the  delivery  to  the  trustee  of an  affidavit  of the
transferee  to the effect  that it is not a  disqualified  holder  and  contains
certain other provisions designed to preclude the automatic reversion of the tax
ownership of that certificate.  For these purposes,  a "disqualified  holder' is
any person other than a:

o    FASIT; or

o    domestic C  corporation,  other than a corporation  that is exempt from, or
     not subject to,  federal  income tax;  provided,  however,  that all of the
     following are also "disqualified holders":

o    regulated  investment  companies  subject  to the  provisions  of Part I of
     subchapter M of the Code;

o    real  estate  investment  trusts  subject to the  provisions  of Part II of
     subchapter M of the Code;

o    REMICs; and

o    cooperatives described in Section 1381(a) of the Code.

     Pass-through Entities Holding FASIT Regular Certificates. If a Pass-Through
Entity issues a  high-yielding  debt or equity interest that is supported by any
FASIT Regular  Interest,  that entity will be subject to an excise tax unless no
principal  purpose  of the  resecuritization  was  the  avoidance  of the  rules
relating to FASIT high-yield interests,  pertaining to eligible holders of those
interests.    See   "Taxation   of   Owners   of   REMIC   and   FASIT   Regular
Certificates--Taxation     of    Holders    of    FASIT    High-yield    Regular
Interests--Transfer  Restrictions" in this prospectus. The tax will apply if the
original  yield to maturity of the debt or equity  interest in the  Pass-Through
Entity exceeds the greater of:

      (1)  the sum of:

o    the  applicable  federal rate in effect for the calendar month in which the
     debt or equity interest is issued; and

o    five percentage points; or

     (2)  the yield to maturity to such  entity on the FASIT  Regular  Interest,
          determined as of the date that the entity acquired its interest.

     The Code provides that Treasury  regulations  will be issued to provide the
manner in which to  determine  the yield to  maturity  of any  equity  interest,
however no regulations  have yet been issued.  If a tax did apply, the tax would
equal the product of:

     o    the highest corporate tax rate; and

     o    the  income  of the  holder  of the debt or  equity  interest  that is
          properly  attributable  to the FASIT Regular  Interest  supporting the
          equity interest.

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<PAGE>

Taxation of Owners of REMIC Residual Certificates

     General.  As residual  interests,  the REMIC Residual  Certificates will be
subject to tax rules that  differ  significantly  from those that would apply if
the REMIC Residual  Certificates were treated for federal income tax purposes as
direct  ownership  interests in the loans or as debt  instruments  issued by the
REMIC.

     A holder of a REMIC  Residual  Certificate  generally  will be  required to
report  its daily  portion of the  taxable  income  or, in  accordance  with the
limitations  noted in this  discussion,  the net loss of the  REMIC for each day
during a calendar quarter that the holder owned the REMIC Residual  Certificate.
For this purpose,  the taxable income or net loss of the REMIC will be allocated
to each day in the calendar  quarter  ratably using a "30 days per month/90 days
per quarter/360  days per year" convention or some other convention if stated in
the accompanying prospectus supplement. The daily amounts will then be allocated
among the REMIC residual  certificateholders  in proportion to their  respective
ownership  interests  on that day.  Any amount  included in the gross  income or
allowed  as a loss of any  REMIC  residual  certificateholder  by virtue of this
allocation will be treated as ordinary income or loss. The taxable income of the
REMIC  will be  determined  under  the rules  described  in this  prospectus  in
"--Taxable  Income of the  REMIC"  and will be  taxable  to the  REMIC  residual
certificateholders  without regard to the timing or amount of cash distributions
by the REMIC.  Ordinary income derived from REMIC Residual  Certificates will be
"portfolio  income" for purposes of the taxation of taxpayers in accordance with
limitations  under  Section  469 of the Code on the  deductibility  of  "passive
losses."

     A holder of a REMIC Residual  Certificate  that  purchased the  certificate
from a prior holder of that  certificate  also will be required to report on its
federal income tax return amounts  representing its daily portion of the taxable
income or net loss of the  REMIC  for each day that it holds the REMIC  Residual
Certificate.  These daily  portions  generally will equal the amounts of taxable
income or net loss determined as described above. The committee report indicates
that modifications of the general rules may be made, by regulations, legislation
or otherwise,  to reduce,  or increase,  the income or loss of a REMIC  residual
certificateholder  that  purchased the REMIC Residual  Certificate  from a prior
holder of the  certificate  at a price greater than, or less than,  the adjusted
basis, as defined below,  that REMIC Residual  Certificate would have had in the
hands of an original holder of that certificate. The REMIC regulations, however,
do not provide for any such modifications.

     Any payments received by a REMIC residual  certificateholder  in connection
with the  acquisition  of that  REMIC  Residual  Certificate  will be taken into
account in determining the income of the holder for federal income tax purposes.
Although  it appears  likely  that any  payment  would be  includible  in income
immediately  on its  receipt,  the IRS might  assert that the payment  should be
included in income over time according to an amortization  schedule or according
to some other method.  Because of the  uncertainty  concerning  the treatment of
these payments,  holders of REMIC Residual Certificates should consult their tax
advisors concerning the treatment of these payments for income tax purposes.

     The amount of income REMIC residual  certificateholders will be required to
report, or the tax liability  associated with that income, may exceed the amount
of cash  distributions  received  from the REMIC for the  corresponding  period.
Consequently,  REMIC  residual  certificateholders  should have other sources of
funds  sufficient  to pay any  federal  income  taxes  due as a result  of their
ownership of REMIC Residual  Certificates or unrelated  deductions against which
income may be offset,  subject to the rules relating to "excess  inclusions" and
"noneconomic"  residual  interests  discussed  below.  The  fact  that  the  tax
liability   associated   with   the   income   allocated   to   REMIC   residual
certificateholders  may  exceed  the cash  distributions  received  by the REMIC
residual  certificateholders  for the  corresponding  period  may  significantly
adversely affect the REMIC residual certificateholders after-tax rate of return.

     Taxable Income of the REMIC. The taxable income of the REMIC will equal the
income  from the loans and other  assets of the REMIC plus any  cancellation  of
indebtedness  income  due  to the  allocation  of  Realized  Losses  to  Regular
Certificates,  less the deductions allowed to the REMIC for interest,  including
original issue discount and reduced by the  amortization of any premium received
on  issuance,  on the  Regular  Certificates,  and  any  other  class  of  REMIC
certificates  constituting  "regular interests" in the REMIC not offered hereby,
amortization of any premium on the loans, bad debt deductions for the loans and,
except as described below, for servicing, administrative and other expenses.

                                       82
<PAGE>

     For  purposes of  determining  its taxable  income,  the REMIC will have an
initial  aggregate  basis  in its  assets  equal  to  their  fair  market  value
immediately  after their transfer to the REMIC. For this purpose,  the servicer,
the subservicer,  or REMIC  administrator,  as applicable,  intends to treat the
fair market value of the loans as being equal to the  aggregate  issue prices of
the Regular  Certificates and REMIC Residual  Certificates.  The aggregate basis
will be allocated among the loans collectively and the other assets of the REMIC
in proportion to their  respective  fair market  values.  The issue price of any
REMIC certificates  offered hereby will be determined in the manner described in
this  prospectus  under  "--Taxation  of  Owners  of  REMIC  and  FASIT  Regular
Certificates--Original  Issue Discount." Accordingly,  if one or more classes of
REMIC  certificates are retained  initially rather than sold, the servicer,  the
subservicer, or REMIC administrator,  as applicable, may be required to estimate
the fair market value of those  interests in order to determine the basis of the
REMIC in the loans and other property held by the REMIC.

     Subject to the possible  application of the de minimis rules, the method of
accrual by the REMIC of  original  issue  discount  income  and market  discount
income  for loans  that it holds will be  equivalent  to the method of  accruing
original  issue  discount  income  for  regular  certificateholders;  under  the
constant yield method taking into account the prepayment assumption.  However, a
REMIC that acquires collateral at a market discount must include the discount in
income currently,  as it accrues, on a constant interest basis. See "-- Taxation
of Owners of REMIC and FASIT Regular  Certificates"  in this  prospectus,  which
describes  a method  of  accruing  discount  income  that is  analogous  to that
required to be used by a REMIC as to loans with market discount that it holds.

     A loan will be deemed to have been acquired with discount or premium to the
extent that the  REMIC's  basis in that loan,  determined  as  described  in the
preceding  paragraph,  is less than or greater than its stated redemption price.
Any discount  will be  includible  in the income of the REMIC as it accrues,  in
advance of  receipt  of the cash  attributable  to that  income,  under a method
similar to the method  described  above for accruing  original issue discount on
the Regular  Certificates.  It is  anticipated  that each REMIC will elect under
Section  171 of the Code to amortize  any  premium on the loans.  Premium on any
loan to which the  election  applies  may be  amortized  under a constant  yield
method, presumably taking into account a prepayment assumption.

     A REMIC will be allowed  deductions for interest,  including original issue
discount,  on the  Regular  Certificates,  including  any  other  class of REMIC
certificates  constituting  "regular interests" in the REMIC not offered hereby,
equal to the  deductions  that  would be allowed  if the  Regular  Certificates,
including any other class of REMIC certificates constituting "regular interests"
in the REMIC not offered hereby, were indebtedness of the REMIC.  Original issue
discount  will be  considered  to accrue for this  purpose as  described in this
prospectus   under   "--Taxation   of  Owners   of  REMIC   and  FASIT   Regular
Certificates--Original  Issue Discount," except that the de minimis rule and the
adjustments for subsequent holders of Regular Certificates,  including any other
class of certificates  constituting "regular interests" in the REMIC not offered
hereby,  described in this prospectus  under  "--Taxation of Owners of REMIC and
FASIT Regular Certificates--Original Issue Discount," will not apply.

     If a class of Regular  Certificates is issued at an Issue Premium,  the net
amount of interest  deductions  that are allowed the REMIC in each  taxable year
for the Regular Certificates of that class will be reduced by an amount equal to
the portion of the Issue Premium that is considered to be amortized or repaid in
that year.  Although the matter is not entirely certain, it is likely that Issue
Premium would be amortized  under a constant yield method in a manner  analogous
to the method of accruing  original issue discount  described in this prospectus
under  "--Taxation  of Owners of REMIC and FASIT Regular  Certificates--Original
Issue Discount."

     As a general  rule,  the taxable  income of the REMIC will be determined in
the same manner as if the REMIC were an  individual  having the calendar year as
its taxable year and using the accrual method of accounting. However, no item of
income,  gain, loss or deduction  allocable to a prohibited  transaction will be
taken into  account.  See  "--Prohibited  Transactions  and Other Taxes" in this
prospectus. Further, the limitation on miscellaneous itemized deductions imposed
on individuals by Section 67 of the Code,  which allows those deductions only to
the extent they exceed in the aggregate two percent of the  taxpayer's  adjusted
gross  income,  will not be applied at the REMIC level so that the REMIC will be
allowed deductions for servicing, administrative and other non-interest expenses
in determining its taxable income.  All of these expenses will be allocated as a
separate  item to the  holders of REMIC  Residual  Certificates,  subject to the
limitation  of  Section  67  of  the  Code.  See  "--Possible   Pass-Through  of
Miscellaneous Itemized Deductions" in this prospectus. If the deductions allowed
to the REMIC exceed its gross income for a calendar quarter,  the excess will be
the net loss for the REMIC for that calendar quarter.

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<PAGE>

     Basis Rules,  Net Losses and  Distributions.  The adjusted basis of a REMIC
Residual  Certificate  will be equal to the amount paid for that REMIC  Residual
Certificate,  increased  by  amounts  included  in the  income  of  the  related
certificateholder and decreased,  but not below zero, by distributions made, and
by net losses allocated, to the related certificateholder.

     A REMIC residual  certificateholder is not allowed to take into account any
net loss for any  calendar  quarter to the extent the net loss exceeds the REMIC
residual certificateholder's adjusted basis in its REMIC Residual Certificate as
of the close of that  calendar  quarter,  determined  without  regard to the net
loss. Any loss that is not currently deductible by reason of this limitation may
be carried forward  indefinitely to future calendar  quarters and, in accordance
with the same  limitation,  may be used  only to  offset  income  from the REMIC
Residual Certificate. The ability of REMIC residual certificateholders to deduct
net losses in accordance with additional limitations under the Code, as to which
the certificateholders should consult their tax advisors.

     Any  distribution  on a REMIC  Residual  Certificate  will be  treated as a
non-taxable  return of capital  to the  extent it does not  exceed the  holder's
adjusted basis in the REMIC Residual  Certificate.  To the extent a distribution
on a REMIC Residual  Certificate  exceeds the adjusted basis, it will be treated
as gain  from the  sale of the  REMIC  Residual  Certificate.  Holders  of REMIC
Residual  Certificates may be entitled to distributions early in the term of the
related  REMIC under  circumstances  in which their basis in the REMIC  Residual
Certificates will not be sufficiently  large that  distributions will be treated
as nontaxable returns of capital. Their basis in the REMIC Residual Certificates
will initially equal the amount paid for those REMIC Residual  Certificates  and
will be increased  by their  allocable  shares of taxable  income of the related
trust fund.  However,  their basis  increases may not occur until the end of the
calendar  quarter,  or perhaps the end of the calendar year, for which the REMIC
taxable  income is allocated to the REMIC  residual  certificateholders.  To the
extent the REMIC  residual  certificateholders  initial  basis are less than the
distributions  to the REMIC  residual  certificateholders,  and increases in the
initial basis either occur after  distributions  or, together with their initial
basis, are less than the amount of the distributions, gain will be recognized to
the REMIC residual certificateholders on those distributions and will be treated
as gain from the sale of their REMIC Residual Certificates.

     The effect of these rules is that a certificateholder  may not amortize its
basis in a REMIC  Residual  Certificate,  but may only recover its basis through
distributions, through the deduction of its share of any net losses of the REMIC
or on the  sale  of its  REMIC  Residual  Certificate.  See  "--Sales  of  REMIC
Certificates" in this prospectus.  For a discussion of possible modifications of
these  rules  that may  require  adjustments  to  income  of a holder of a REMIC
Residual  Certificate  other than an  original  holder in order to  reflect  any
difference between the cost of the REMIC Residual  Certificate to its holder and
the adjusted basis the REMIC Residual Certificate would have had in the hands of
the original holder, see "--General" in this prospectus

     Excess Inclusions. Any "excess inclusions" for a REMIC Residual Certificate
will be subject to federal income tax in all events.

     In general,  the "excess  inclusions" for a REMIC Residual  Certificate for
any calendar quarter will be the excess, if any, of:

o    the sum of the daily  portions of REMIC  taxable  income  allocable  to the
     REMIC Residual Certificate;

           over

o    the sum of the "daily  accruals," as described in the  following  sentence,
     for each day during that quarter that the REMIC  Residual  Certificate  was
     held by the REMIC residual certificateholder.

The daily accruals of a REMIC residual  certificateholder  will be determined by
allocating  to each day during a calendar  quarter  its  ratable  portion of the
product of the "adjusted  issue price" of the REMIC Residual  Certificate at the
beginning of the calendar  quarter and 120% of the  "long-term  Federal rate" in
effect on the closing  date.  For this  purpose,  the adjusted  issue price of a
REMIC Residual  Certificate as of the beginning of any calendar  quarter will be
equal to the issue price of the REMIC Residual Certificate, increased by the sum
of the daily accruals for all prior quarters and decreased,  but not below zero,
by any distributions made on the REMIC Residual Certificate before the beginning
of that quarter.  The issue price of a REMIC Residual Certificate is the initial
offering price to


                                       84
<PAGE>

the  public,  excluding  bond  houses,  brokers  and  underwriters,  at  which a
substantial amount of the REMIC Residual  Certificates were sold. If less than a
substantial amount of a particular class of REMIC Residual  Certificates is sold
for cash on or prior to the closing date,  the issue price of that class will be
treated  as the  fair  market  value  of that  class on the  closing  date.  The
"long-term Federal rate" is an average of current yields on Treasury  securities
with a remaining term of greater than nine years, computed and published monthly
by the IRS.

     For REMIC residual certificateholders, an excess inclusion:

o    will not be permitted to be offset by deductions, losses or loss carryovers
     from other activities;

o    will be treated as  "unrelated  business  taxable  income" to an  otherwise
     tax-exempt organization; and

o    will  not be  eligible  for any  rate  reduction  or  exemption  under  any
     applicable tax treaty for the 30% United States  withholding tax imposed on
     distributions  to  REMIC  residual   certificateholders  that  are  foreign
     investors.

See, however, "--Foreign Investors in Regular Certificates" in this prospectus.

     Furthermore,  for  purposes  of the  alternative  minimum  tax,  (1) excess
inclusions  will  not be  permitted  to be  offset  by the  alternative  tax net
operating loss deduction and (2)  alternative  minimum taxable income may not be
less than the taxpayer's excess inclusions; provided, however, that for purposes
of (2),  alternative  minimum taxable income is determined without regard to the
special  rule that taxable  income  cannot be less than excess  inclusions.  The
latter rule has the effect of preventing nonrefundable tax credits from reducing
the taxpayer's income tax to an amount lower than the alternative minimum tax on
excess inclusions.

     In the  case of any  REMIC  Residual  Certificates  held  by a real  estate
investment  trust,  the  aggregate  excess  inclusions  allocated  to the  REMIC
Residual  Certificates,  reduced,  but  not  below  zero,  by  the  real  estate
investment trust taxable income,  within the meaning of Section 857(b)(2) of the
Code,  excluding any net capital gain, will be allocated among the  shareholders
of the trust in proportion to the dividends  received by the  shareholders  from
the trust,  and any amount so allocated  will be treated as an excess  inclusion
from a REMIC  Residual  Certificate  as if  held  directly  by the  shareholder.
Treasury  regulations  yet to be issued  could apply a similar rule to regulated
investment  companies,  common  trust  funds  and some  cooperatives;  the REMIC
regulations currently do not address this subject.

     Noneconomic  REMIC  Residual  Certificates.  Under the  REMIC  regulations,
transfers of "noneconomic"  REMIC Residual  Certificates will be disregarded for
all federal income tax purposes if "a significant purpose of the transfer was to
enable the  transferor  to impede the  assessment  or collection of tax." If the
transfer is disregarded, the purported transferor will continue to remain liable
for any taxes due with respect to the income on the "noneconomic" REMIC Residual
Certificate.  The REMIC regulations provide that a REMIC Residual Certificate is
noneconomic  unless,  based on the prepayment  assumption and on any required or
permitted clean up calls, or required qualified  liquidation provided for in the
REMIC's organizational documents:

      (1)  the present value of the expected  future  distributions,  discounted
           using the "applicable  federal rate" for obligations  whose term ends
           on the  close of the last  quarter  in which  excess  inclusions  are
           expected to accrue on the REMIC Residual  Certificate,  which rate is
           computed  and  published  monthly by the IRS,  on the REMIC  Residual
           Certificate  equals at least the present value of the expected tax on
           the anticipated excess inclusions; and

      (2)  the transferor  reasonably  expects that the transferee  will receive
           distributions on the REMIC Residual  Certificate at or after the time
           the taxes accrue on the  anticipated  excess  inclusions in an amount
           sufficient to satisfy the accrued taxes.

Accordingly,  all transfers of REMIC Residual  Certificates  that may constitute
noneconomic  residual  interests will be subject to restrictions under the terms
of the related  pooling and  servicing  agreement  or trust  agreement  that are
intended  to reduce the  possibility  of any  transfer  being  disregarded.  The
restrictions  will require each party to a transfer to provide an affidavit that
no purpose of the transfer is to impede the  assessment  or  collection  of tax,
including  representations  as to the  financial  condition  of the  prospective
transferee,  as to which the  transferor  also is required to make a  reasonable
investigation  to determine the  transferee's  historic payment of its debts and
ability to

                                       85
<PAGE>

continue  to pay its debts as they come due in the  future.  The IRS has  issued
proposed  changes  to the REMIC  regulations  that  would add to the  conditions
necessary to assure that a transfer of a noneconomic  residual interest would be
respected.  The  proposed  additional  condition  would  require that the amount
received by the  transferee be no less on a present value basis than the present
value of the net tax detriment attributable to holding residual interest reduced
by the present  value of the  projected  payments to be received on the residual
interest.  The change is  proposed to be  effective  for  transfers  of residual
interests occurring after February 4, 2000. Prior to purchasing a REMIC Residual
Certificate,  prospective  purchasers  should  consider the  possibility  that a
purported transfer of the REMIC Residual Certificate by the purchaser to another
purchaser  at some  future  date  may be  disregarded  in  accordance  with  the
above-described  rules which would result in the  retention of tax  liability by
the first purchaser.

     The accompanying  prospectus supplement will disclose whether offered REMIC
Residual Certificates may be considered  "noneconomic"  residual interests under
the REMIC regulations. Any disclosure that a REMIC Residual Certificate will not
be considered "noneconomic" will be based on some assumptions, and the depositor
will  make no  representation  that a REMIC  Residual  Certificate  will  not be
considered   "noneconomic"  for  purposes  of  the  above-described  rules.  See
"--Foreign  Investors  in  Regular  Certificates"  for  additional  restrictions
applicable  to  transfers  of certain  REMIC  Residual  Certificates  to foreign
persons.

     Possible  Pass-Through  of  Miscellaneous  Itemized  Deductions.  Fees  and
expenses of a REMIC  generally  will be  allocated to the holders of the related
REMIC Residual  Certificates.  The  applicable  Treasury  regulations  indicate,
however,  that in the case of a REMIC that is similar to a single class  grantor
trust,  all or a portion of those fees and  expenses  should be allocated to the
holders of the related Regular Certificates. Fees and expenses will be allocated
to holders of the related REMIC Residual  Certificates in their entirety and not
to the holders of the related  Regular  Certificates or if stated in the related
prospectus supplement, some or all of the fees and expenses will be allocated to
the holders of the related Regular Certificates.

     For REMIC  Residual  Certificates  or Regular  Certificates  the holders of
which  receive  an  allocation  of fees  and  expenses  in  accordance  with the
preceding discussion,  if any holder thereof is an individual,  estate or trust,
or a Pass-Through Entity beneficially owned by one or more individuals,  estates
or trusts:

o    an amount equal to the individual's,  estate's or trust's share of fees and
     expenses will be added to the gross income of that holder; and

o    the  individual's,  estate's or trust's  share of fees and expenses will be
     treated as a miscellaneous  itemized deduction allowable in accordance with
     the  limitation of Section 67 of the Code,  which permits those  deductions
     only to the extent they exceed in the aggregate two percent of a taxpayer's
     adjusted gross income.

     In addition, Section 68 of the Code provides that the amount of itemized
deductions  otherwise  allowable for an individual  whose  adjusted gross income
exceeds a specified amount will be reduced by the lesser of:

o    3% of the  excess  of the  individual's  adjusted  gross  income  over that
     amount; or

o    80% of the  amount  of  itemized  deductions  otherwise  allowable  for the
     taxable year.

The amount of additional  taxable income reportable by REMIC  certificateholders
that are in accordance  with the  limitations of either Section 67 or Section 68
of the Code may be  substantial.  Furthermore,  in determining  the  alternative
minimum  taxable  income  of  the  holder  of a  REMIC  certificate  that  is an
individual,  estate or trust, or a Pass-Through Entity beneficially owned by one
or more  individuals,  estates or trusts,  no deduction will be allowed for that
holder's  allocable portion of servicing fees and other  miscellaneous  itemized
deductions of the REMIC, even though an amount equal to the amount of those fees
and other deductions will be included in the holder's gross income. Accordingly,
the REMIC  certificates  may not be  appropriate  investments  for  individuals,
estates, or trusts, or Pass-Through  Entities  beneficially owned by one or more
individuals,  estates or trusts.  Any prospective  investors should consult with
their tax advisors prior to making an investment in these certificates.

                                       86
<PAGE>

     Tax and Restrictions on Transfers of REMIC Residual Certificates to Certain
Organizations.  If a REMIC Residual Certificate is transferred to a Disqualified
Organization,  a tax would be imposed in an amount,  determined  under the REMIC
regulations, equal to the product of:

o    the present  value,  discounted  using the  "applicable  federal  rate" for
     obligations  whose  term  ends on the  close of the last  quarter  in which
     excess inclusions are expected to accrue on the certificate,  which rate is
     computed and published monthly by the IRS, of the total anticipated  excess
     inclusions  on  the  REMIC  Residual  Certificate  for  periods  after  the
     transfer; and

o    the highest marginal federal income tax rate applicable to corporations.

     The  anticipated  excess  inclusions must be determined as of the date that
the REMIC Residual  Certificate is transferred  and must be based on events that
have  occurred up to the time of transfer,  the  prepayment  assumption  and any
required or permitted clean up calls or required liquidation provided for in the
REMIC's  organizational  documents.  This tax generally  would be imposed on the
transferor of the REMIC Residual Certificate,  except that where the transfer is
through  an agent for a  Disqualified  Organization,  the tax would  instead  be
imposed on that agent.  However,  a transferor of a REMIC  Residual  Certificate
would  in no  event  be  liable  for the  tax on a  transfer  if the  transferee
furnishes  to  the  transferor  an  affidavit  that  the  transferee  is  not  a
Disqualified  Organization  and, as of the time of the transfer,  the transferor
does not have actual knowledge that the affidavit is false.  Moreover, an entity
will not qualify as a REMIC unless there are reasonable arrangements designed to
ensure that:

o    residual   interests   in  the   entity   are  not  held  by   Disqualified
     Organizations; and

o    information  necessary  for the  application  of the tax  described in this
     prospectus will be made available.

     Restrictions  on the  transfer  of REMIC  Residual  Certificates  and other
provisions  that are intended to meet this  requirement  will be included in the
pooling and servicing agreement, including provisions:

(1)  requiring any  transferee  of a REMIC  Residual  Certificate  to provide an
     affidavit  representing  that it is not a Disqualified  Organization and is
     not acquiring the REMIC  Residual  Certificate  on behalf of a Disqualified
     Organization,  undertaking to maintain that status and agreeing to obtain a
     similar  affidavit  from any  person  to whom it shall  transfer  the REMIC
     Residual Certificate;

(2)  providing  that  any  transfer  of  a  REMIC  Residual   Certificate  to  a
     Disqualified Organization shall be null and void; and

(3)  granting to the servicer or the  subservicer  the right,  without notice to
     the holder or any prior  holder,  to sell to a purchaser  of its choice any
     REMIC  Residual  Certificate  that  shall  become  owned by a  Disqualified
     Organization despite (1) and (2) above.

     In addition,  if a Pass-Through Entity includes in income excess inclusions
on a REMIC Residual Certificate,  and a Disqualified  Organization is the record
holder of an interest in that  entity,  then a tax will be imposed on the entity
equal to the product of:

o    the amount of excess inclusions on the REMIC Residual  Certificate that are
     allocable  to  the  interest  in  the  Pass-Through   Entity  held  by  the
     Disqualified Organization; and

o     the highest marginal federal income tax rate imposed on corporations.

A Pass-Through  Entity will not be subject to this tax for any period,  however,
if each record  holder of an interest in the  Pass-Through  Entity  furnishes to
that Pass-Through Entity:

o    the holder's  social  security  number and a statement  under  penalties of
     perjury that the social security number is that of the record holder; or

o    a statement  under  penalties  of perjury  that the record  holder is not a
     Disqualified Organization.

                                       87
<PAGE>

For taxable years beginning after December 31, 1997, regardless of the preceding
two sentences,  in the case of a REMIC Residual Certificate held by an "electing
large  partnership,"  all interests in that partnership shall be treated as held
by Disqualified  Organizations,  without regard to whether the record holders of
the partnership furnish statements described in the preceding sentence,  and the
amount  that is subject to tax under the second  preceding  sentence is excluded
from the gross income of the partnership  allocated to the partners,  in lieu of
allocating to the partners a deduction for the tax paid by the partners.

     Sales  of   certificates.   If  a   certificate   is  sold,   the   selling
certificateholder  will recognize  gain or loss equal to the difference  between
the amount realized on the sale and its adjusted basis in the  certificate.  The
adjusted  basis of a Regular  Certificate  generally will equal the cost of that
Regular Certificate to that  certificateholder,  increased by income reported by
the  certificateholder  with  respect  to that  Regular  Certificate,  including
original issue discount and market discount income,  and reduced,  but not below
zero,   by   distributions   on  the   Regular   Certificate   received  by  the
certificateholder  and by any amortized  premium.  The adjusted basis of a REMIC
Residual Certificate will be determined as described under "--Taxation of Owners
of REMIC Residual  Certificates--Basis  Rules, Net Losses and  Distributions" in
this  prospectus.  Except as described below, any gain or loss generally will be
capital gain or loss.

     Gain from the sale of a REMIC Regular Certificate, but not a FASIT regular
interest,  that  might  otherwise  be capital  gain will be treated as  ordinary
income to the extent the gain does not exceed the excess, if any, of:

o    the amount that would have been  includible in the seller's  income for the
     Regular  Certificate  had income accrued thereon at a rate equal to 110% of
     the  "applicable  federal  rate,"  which is  typically  a rate  based on an
     average  of  current  yields  on  Treasury  securities  having  a  maturity
     comparable to that of the certificate, which rate is computed and published
     monthly by the IRS,  determined  as of the date of  purchase of the Regular
     Certificate;

           over

o    the amount of ordinary  income  actually  includible in the seller's income
     prior to the sale.

In addition,  gain  recognized on the sale of a Regular  Certificate by a seller
who purchased the Regular  Certificate  at a market  discount will be taxable as
ordinary income to the extent of any accrued and previously  unrecognized market
discount  that  accrued  during  the  period  the   certificate  was  held.  See
"--Taxation of Owners of REMIC and FASIT Regular Certificates--Market  Discount"
in this prospectus.

     A portion  of any gain from the sale of a Regular  Certificate  that  might
otherwise be capital  gain may be treated as ordinary  income to the extent that
the certificate is held as part of a "conversion transaction" within the meaning
of Section 1258 of the Code. A conversion  transaction generally is one in which
the taxpayer has taken two or more positions in certificates or similar property
that reduce or eliminate  market risk, if  substantially  all of the  taxpayer's
return is attributable to the time value of the taxpayer's net investment in the
transaction.  The amount of gain so realized in a conversion transaction that is
recharacterized  as  ordinary  income  generally  will not  exceed the amount of
interest that would have accrued on the taxpayer's net investment at 120% of the
appropriate  "applicable  federal  rate," which rate is computed  and  published
monthly  by the IRS,  at the  time  the  taxpayer  enters  into  the  conversion
transaction,  subject to appropriate  reduction for prior  inclusion of interest
and other ordinary income items from the transaction.

     Finally,  a taxpayer  may elect to have net capital  gain taxed at ordinary
income rates rather than capital gains rates in order to include any net capital
gain in total net  investment  income for the taxable year,  for purposes of the
limitation on the deduction of interest on indebtedness  incurred to purchase or
carry property held for investment to a taxpayer's net investment income.

     If the seller of a REMIC Residual  Certificate  reacquires the certificate,
any other  residual  interest in a REMIC or any  similar  interest in a "taxable
mortgage pool," as defined in Section 7701(i) of the Code,  within six months of
the date of the sale,  the sale will be  subject  to the  "wash  sale"  rules of
Section 1091 of the Code. In that event, any loss realized by the REMIC residual
certificateholders on the sale will not be deductible, but instead will be added
to the REMIC residual  certificateholders  adjusted basis in the  newly-acquired
asset.

                                       88
<PAGE>

     Prohibited  Transactions  and Other  Taxes.  The Code  imposes a prohibited
transactions  tax,  which is a tax on  REMICs  equal  to 100% of the net  income
derived  from  prohibited   transactions.   In  general,  subject  to  specified
exceptions a prohibited transaction means the disposition of a loan, the receipt
of income from a source other than any loan or other Permitted Investments,  the
receipt of compensation  for services,  or gain from the disposition of an asset
purchased  with the  payments  on the loans  for  temporary  investment  pending
distribution on the REMIC  certificates.  It is not  anticipated  that any REMIC
will  engage  in any  prohibited  transactions  in which it  would  recognize  a
material amount of net income. In addition,  some  contributions to a REMIC made
after the day on which the REMIC issues all of its interests could result in the
imposition of a contributions  tax, which is a tax on the REMIC equal to 100% of
the value of the contributed  property.  Each pooling and servicing agreement or
trust  agreement will include  provisions  designed to prevent the acceptance of
any contributions that would be subject to the tax.

     REMICs also are subject to federal income tax at the highest corporate rate
on "net income from foreclosure  property," determined by reference to the rules
applicable  to real estate  investment  trusts.  "Net  income  from  foreclosure
property"  generally means gain from the sale of a foreclosure  property that is
inventory  property  and gross  income  from  foreclosure  property  other  than
qualifying rents and other qualifying income for a real estate investment trust.
It is not anticipated that any REMIC will recognize "net income from foreclosure
property" subject to federal income tax, however,  if a REMIC may be required to
recognize "net income from foreclosure  property" subject to federal income tax,
it will be stated in the related prospectus supplement.

     It is not anticipated  that any material state or local income or franchise
tax will be imposed on any REMIC,  however if any material state or local income
or  franchise  tax may be imposed on a REMIC,  it will be stated in the  related
prospectus supplement.

     To  the  extent   permitted  by  then   applicable   laws,  any  prohibited
transactions  tax,  contributions  tax,  tax on  "net  income  from  foreclosure
property" or state or local  income or franchise  tax that may be imposed on the
REMIC  will be  borne  by the  related  servicer,  the  subservicer,  the  REMIC
administrator,  the trustee,  or such other  entity as stated in the  applicable
prospectus  supplement,  in any case  out of its own  funds,  provided  that the
servicer, the subservicer, the REMIC administrator, the trustee, or other entity
as stated  in the  applicable  prospectus  supplement,  as the case may be,  has
sufficient  assets to do so, and  provided  further that the tax arises out of a
breach of the servicer's,  the  subservicer's,  the REMIC  administrator's,  the
trustee's,  or other entity as stated in the applicable  prospectus  supplement,
obligations,  as the  case may be,  under  the  related  pooling  and  servicing
agreement or trust agreement and relating to compliance with applicable laws and
regulations. Any tax not borne by the servicer, the subservicer, the trustee, or
other entity as stated in the applicable prospectus supplement,  will be payable
out of the related trust  resulting in a reduction in amounts payable to holders
of the related REMIC certificates.

     In the case of a FASIT,  the holder of the  ownership  interest and not the
FASIT itself will be subject to any prohibited transaction taxes.

     Termination. A REMIC will terminate immediately after the distribution date
following  receipt by the REMIC of the final payment from the loans or on a sale
of the REMIC's assets  following the adoption by the REMIC of a plan of complete
liquidation. The last distribution on a Regular Certificate will be treated as a
payment in  retirement  of a debt  instrument.  In the case of a REMIC  Residual
Certificate,  if the last distribution on the REMIC Residual Certificate is less
than  the   certificateholder's   adjusted   basis  in  the   certificate,   the
certificateholder  should be treated as  realizing a loss equal to the amount of
the difference, and the loss may be treated as a capital loss.

     Reporting  and Other  Administrative  Matters.  Solely for  purposes of the
administrative  provisions of the Code, a REMIC will be treated as a partnership
and REMIC residual certificateholders will be treated as partners. The servicer,
the  subservicer,  the  REMIC  administrator,  or other  entity as stated in the
applicable prospectus supplement, as applicable,  will file REMIC federal income
tax  returns  on behalf of the  related  REMIC and will act as the "tax  matters
person" for the REMIC in all  respects,  and may hold a nominal  amount of REMIC
Residual Certificates.

     As the tax  matters  person,  the  servicer,  the  subservicer,  the  REMIC
administrator,   or  other  entity  as  stated  in  the  applicable   prospectus
supplement, as applicable, will have the authority to act on behalf of the REMIC


                                       89
<PAGE>

and the REMIC residual  certificateholders in connection with the administrative
and judicial review of items of income, deduction, gain or loss of the REMIC, as
well as the REMIC's  classification.  REMIC residual  certificateholders will be
required  to report the REMIC items  consistently  with their  treatment  on the
related  REMIC's  tax  return  and  may in  some  circumstances  be  bound  by a
settlement   agreement  between  the  servicer,   the  subservicer,   the  REMIC
administrator,   or  other  entity  as  stated  in  the  applicable   prospectus
supplement,  as applicable,  as tax matters  person,  and the IRS concerning any
REMIC item.

     Adjustments  made to the  REMIC tax  return  may  require a REMIC  residual
certificateholders to make corresponding adjustments on its return, and an audit
of the REMIC's tax return,  or the  adjustments  resulting from an audit,  could
result  in an  audit  of  the  certificateholder's  return.  No  REMIC  will  be
registered  as a tax shelter  under  Section  6111 of the Code because it is not
anticipated  that any  REMIC  will  have a net loss  for any of the  first  five
taxable  years  of its  existence.  Any  person  that  holds  a  REMIC  Residual
Certificate  as a nominee for  another  person may be required to furnish to the
related REMIC, in a manner to be provided in Treasury regulations,  the name and
address of that person and other information.

     Reporting of interest  income,  including any original issue  discount,  on
Regular  Certificates is required annually,  and may be required more frequently
under Treasury regulations. These information reports are required to be sent to
individual  holders  of  regular  interests  and the  IRS;  holders  of  Regular
Certificates  that  are  corporations,  trusts,  securities  dealers  and  other
non-individuals  will be provided  interest and original issue  discount  income
information  and the  information  in the  following  paragraph  on  request  in
accordance with the requirements of the applicable regulations.  The information
must be  provided by the later of 30 days after the end of the quarter for which
the  information  was requested,  or two weeks after the receipt of the request.
The REMIC must also comply with rules  requiring  a Regular  Certificate  issued
with original issue discount to disclose on its face  information  including the
amount of  original  issue  discount  and the issue  date,  and  requiring  that
information  to be  reported  to the  IRS.  Reporting  for  the  REMIC  Residual
Certificates,  including  income,  excess  inclusions,  investment  expenses and
relevant information regarding  qualification of the REMIC's assets will be made
as required under the Treasury regulations, typically on a quarterly basis.

     As applicable,  the Regular Certificate  information reports will include a
statement  of the  adjusted  issue  price  of  the  Regular  Certificate  at the
beginning  of each  accrual  period.  In  addition,  the  reports  will  include
information  required by  regulations  for  computing  the accrual of any market
discount.  Because  exact  computation  of the  accrual of market  discount on a
constant yield method  requires  information  relating to the holder's  purchase
price that the servicer or the subservicer  will not have, the regulations  only
require that information  pertaining to the appropriate  proportionate method of
accruing  market  discount be provided.  See  "--Taxation of Owners of REMIC and
FASIT Regular Certificates--Market Discount."

     The responsibility for complying with the foregoing reporting rules will be
borne by the  subservicer,  the trustee,  or the REMIC (or FASIT)  administrator
named in the related  prospectus  supplement,  as  specified  in the  prospectus
supplement.  Certificateholders  may request any information with respect to the
returns described in Section 1.6049-7(e)(2) of the Treasury regulations.

Backup Withholding with Respect to Securities

     Payments of interest and  principal,  as well as payments of proceeds  from
the sale of  securities,  may be subject to the "backup  withholding  tax" under
Section  3406 of the Code at a rate of 31% if  recipients  of  payments  fail to
furnish   to  the  payor   certain   information,   including   their   taxpayer
identification  numbers,  or otherwise  fail to establish an exemption  from the
tax. Any amounts  deducted and withheld from a distribution to a recipient would
be allowed as a credit against the recipient's federal income tax.  Furthermore,
penalties  may be imposed by the IRS on a recipient of payments that is required
to supply information but that does not do so in the proper manner.

Foreign Investors in Regular Certificates

     A regular  certificateholder,  other  than a holder  of a FASIT  high-yield
regular  interest,  that is not a United  States  person  and is not  subject to
federal  income  tax as a result of any  direct or  indirect  connection  to the
United States in addition to its ownership of a Regular  Certificate will not be
subject to United States federal income or withholding  tax on a distribution on
a Regular Certificate, provided that the holder complies to the extent necessary


                                       90
<PAGE>

with certain  identification  requirements,  including  delivery of a statement,
signed by the certificateholder under penalties of perjury,  certifying that the
certificateholder  is not a United  States  person  and  providing  the name and
address of the certificateholder.

     For these purposes, United States person means:

o    a citizen or resident of the United States;

o    a  corporation,  partnership  or other entity  created or organized  in, or
     under the laws of, the United States,  any state thereof or the District of
     Columbia,  except, in the case of a partnership,  to the extent provided in
     regulations;

o    an estate  whose  income is subject  to United  States  federal  income tax
     regardless of its source; or

o    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  United
     States persons have the authority to control all  substantial  decisions of
     the trust. To the extent  prescribed in regulations by the Secretary of the
     Treasury,  which regulations have not yet been issued, a trust which was in
     existence  on August 20, 1996,  other than a trust  treated as owned by the
     grantor under subpart E of part I of subchapter J of chapter 1 of the Code,
     and which was treated as a United  States  person on August 19,  1996,  may
     elect to continue to be treated as a United States person regardless of the
     previous sentence.

It is possible that the IRS may assert that the  foregoing tax exemption  should
not  apply  to  a  REMIC   Regular   Certificate   held  by  a  REMIC   residual
certificateholder  that owns directly or indirectly a 10% or greater interest in
the REMIC Residual  Certificates or a FASIT Regular Certificate held by a person
that owns directly or indirectly a 10% or greater  interest in the holder of the
ownership interest in the FASIT.  Further,  the Proposed FASIT Regulations treat
all  interest  received  by a foreign  holder  of a FASIT  regular  interest  as
ineligible  for  the  foregoing  exemption  from  withholding  tax if the  FASIT
receives or accrues  interest from a United States resident in which the foreign
holder has a 10% or more ownership interest or as to which the foreign holder is
a controlled foreign corporation to which the United States resident is related.
If the  holder  does not  qualify  for  exemption,  distributions  of  interest,
including distributions of accrued original issue discount, to the holder may be
subject to a tax rate of 30%,  subject to  reduction  under any  applicable  tax
treaty.

     In addition,  the foregoing  rules will not apply to exempt a United States
shareholder  of a controlled  foreign  corporation  from  taxation on the United
States  shareholder's  allocable  portion of the interest income received by the
controlled foreign corporation.

     Further, it appears that a Regular Certificate would not be included in the
estate of a  non-resident  alien  individual  and would not be subject to United
States estate taxes.  However,  certificateholders  who are  non-resident  alien
individuals should consult their tax advisors concerning this question.

     Generally,  transfers of REMIC Residual  Certificates  and FASIT high-yield
regular  interests  to  investors  that are not United  States  persons  will be
prohibited under the related pooling and servicing agreement or trust agreement,
however, if so stated in the applicable prospectus supplement transfers of REMIC
Residual  Certificates and FASIT high-yield  regular interests to investors that
are not United States persons will be allowed.

                                       91
<PAGE>

     New  Withholding  Regulations.  The  Treasury  Department  has  issued  new
regulations which make some modifications to the withholding, backup withholding
and information  reporting rules described above. The new regulations attempt to
unify  certification   requirements  and  modify  reliance  standards.  The  new
regulations  will be effective for most  payments made after  December 31, 2000.
The new regulations  contain  transaction rules applicable to some payments made
after  December 31, 2000.  Prospective  investors are urged to consult their tax
advisors regarding the new regulations.

Non-REMIC Trust Funds

     The discussion  under this heading applies only to a series with respect to
which a REMIC or FASIT election is not made.

     Characterization  of the Trust Fund.  Upon the  issuance of any series with
respect to which no REMIC or FASIT  election is made and which is  described  in
the related  prospectus  supplement  as a grantor  trust,  Orrick,  Herrington &
Sutcliffe LLP, if it is counsel to the depositor, will deliver its opinion that,
with respect to that series of securities,  under then existing law and assuming
compliance by the depositor,  the servicer and the trustee of the related series
with all of the provisions of the related pooling and servicing  agreement,  and
the  agreement  or  agreements,  if any,  providing  for a credit  facility or a
liquidity  facility,  together with any agreement  documenting  the  arrangement
through  which a credit  facility  or a liquidity  facility is held  outside the
related trust fund, and the agreement or agreements  with any  underwriter,  for
federal  income tax  purposes,  the trust fund will be  classified  as a grantor
trust  and  not  as a  corporation  or an  association  which  is  taxable  as a
corporation (or publicly traded  partnership  treated as a corporation)  and the
grantor  trust  certificates  will be  treated  as  equity in that  trust  fund.
Accordingly,  each grantor trust  certificateholder  will be treated for federal
income tax purposes as the owner of an undivided  equity  interest in the assets
included  in  that  trust  fund.  Further,  if with  respect  to any  series  of
securities  Orrick,  Herrington & Sutcliffe LLP is not counsel to the depositor,
depositor's  then current  counsel will be identified in the related  prospectus
supplement  and will  confirm or  supplement  the  aforementioned  opinions.  As
further  described below,  each grantor trust  certificateholder  must therefore
report on its federal income tax return the gross income from the portion of the
assets of the related trust fund that is allocable to the related  grantor trust
certificate and may deduct its share of the expenses paid by the trust fund that
are  allocable to that grantor  trust  certificate,  at the same time and to the
same extent as those items would be reported by that holder if it had  purchased
and held  directly  such  interest in the assets of the  related  trust fund and
received  directly its share of the payments on the assets of the related  trust
fund and paid  directly  its share of the  expenses  paid by the trust fund when
those  amounts  are  received  and  paid by the  trust  fund.  A  grantor  trust
certificateholder  who is an  individual  will be allowed  deductions  for those
expenses only to the extent that the sum of those  expenses and certain other of
the grantor trust certificateholder's  miscellaneous itemized deductions exceeds
2% of that  individual's  adjusted  gross  income.  In  addition,  the amount of
itemized  deductions  otherwise  allowable for the taxable year of an individual
whose adjusted  gross income  exceeds  certain  thresholds  will be reduced.  It
appears that expenses  paid by the trust fund,  and the gross income used to pay
those  expenses,  should  be  allocated  among  the  classes  of  grantor  trust
certificates  in proportion to their  respective fair market values at issuance,
but because other  reasonable  methods of allocation exist and the allocation of
those items has not been the subject of a controlling court decision, regulation
or ruling by the IRS, no definitive  advice  concerning  the allocation of those
items can be given.

     Under current IRS interpretations of applicable Treasury  regulations,  the
depositor would be able to sell or otherwise dispose of any subordinated grantor
trust  certificates.  Accordingly,  the depositor expects to offer  subordinated
grantor  trust  certificates  for sale to investors.  In general,  subordination
should not affect the federal income tax treatment of either the subordinated or
senior certificates,  and holders of subordinated classes of certificates should
be able to  recognize  any losses  allocated  to the  related  class when and if
losses are realized.

     To the extent that any of the mortgage  loans,  contracts or mortgage loans
underlying the Mortgage Certificates included in a trust fund were originated on
or after March 21, 1984 and under  circumstances  giving rise to original  issue
discount,  grantor trust  certificateholders will be required to report annually
an amount of additional  interest  income  attributable to the discount in those
mortgage loans, contracts or mortgage loans underlying the Mortgage Certificates
prior to receipt of cash related to the discount. See the discussion above under
"Taxation  of Owners of REMIC and  FASIT  Regular  Certificates--Original  Issue
Discount." Similarly, Code provisions concerning market discount and amortizable
premium will apply to the mortgage loans, contracts or mortgage loans underlying
the  Mortgage  Certificates  included  in a trust  fund to the  extent  that the
mortgage loans, contracts or



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<PAGE>

mortgage loans underlying the Mortgage  Certificates  were originated after July
18, 1984 and September 27, 1985,  respectively.  See the discussions above under
"Taxation of Owners of REMIC and FASIT  Regular  Certificates--Market  Discount"
and "--Premium."

     Tax Status of Grantor  Trust  Certificates.  In general,  the grantor trust
certificates,  other than premium grantor trust certificates as discussed below,
will be:

o    "real  estate  assets"  within the meaning of Section  856(c)(4)(A)  of the
     Code; and

o    assets  described in Section  7701(a)(19)(C)  of the Code to the extent the
     trust fund's assets qualify under those sections of the Code.

Any  amount  includible  in gross  income  with  respect  to the  grantor  trust
certificates will be treated as "interest on obligations secured by mortgages on
real  property or on interests in real  property"  within the meaning of Section
856(c)(3)(B)  of the Code to the extent the  income on the trust  fund's  assets
qualifies under that Code section. The IRS has ruled that obligations secured by
permanently  installed  mobile home units qualify as "real estate  assets" under
Section 856(c)(4)(A) of the Code. Assets described in Section  7701(a)(19)(C) of
the Code include  loans  secured by mobile homes not used on a transient  basis.
However, whether manufactured homes would be viewed as permanently installed for
purposes of Section 856 of the Code would depend on the facts and  circumstances
of each case,  because  the IRS  rulings on this issue do not  provide  facts on
which  taxpayers  can rely to achieve  treatment  as "real  estate  assets".  No
assurance can be given that the manufactured  homes will be so treated.  A "real
estate investment trust," or REIT, will not be able to treat that portion of its
investment  in   certificates   that   represents   ownership  of  contracts  on
manufactured  homes that are not  treated  as  permanently  attached  as a "real
estate asset" for REIT qualification purposes. In this regard,  investors should
note  that  generally,   most  contracts   prohibit  the  related  obligor  from
permanently  attaching the related  manufactured home to its site if it were not
so  attached  on the  date  of the  contract.  If so  specified  in the  related
prospectus  supplement,  contracts included in the related trust fund may permit
the obligor to permanently attach the related manufactured home to its site even
if not attached at the date of the  contract.  Grantor trust  certificates  that
represent  the right solely to interest  payments on contracts and grantor trust
certificates that are issued at prices that substantially  exceed the portion of
the  principal  amount  of  the  contracts  allocable  to  those  grantor  trust
certificates,  both  types of  non-REMIC  certificates  referred  to as  premium
grantor trust  certificates,  should qualify under the foregoing sections of the
Code to the same extent as other  certificates,  but the matter is not free from
doubt.  Prospective  purchasers  of  certificates  who  may be  affected  by the
foregoing Code provisions should consult their tax advisors regarding the status
of the certificates under those provisions.

     Taxation of Grantor Trust Certificates  Under Stripped Bond Rules.  Certain
classes of grantor trust  certificates may be subject to the stripped bond rules
of Section 1286 of the Code.  In general,  a grantor trust  certificate  will be
subject  to the  stripped  bond  rules  where  there  has been a  separation  of
ownership  of the right to receive  some or all of the  principal  payments on a
mortgage loan,  contract or mortgage loan  underlying the Mortgage  Certificates
from  ownership  of the right to  receive  some or all of the  related  interest
payments.  Grantor trust certificates will constitute stripped  certificates and
will be  subject to these  rules  under  various  circumstances,  including  the
following:

     (1)  if any servicing compensation is deemed to exceed a reasonable amount;

     (2)  if the  depositor  or any other  party  retains a retained  yield with
          respect to the assets included in a trust fund;

     (3)  if two or more  classes  of  grantor  trust  certificates  are  issued
          representing  the right to non-pro rata percentages of the interest or
          principal payments on the assets included in a trust fund; or

     (4)  if grantor trust  certificates are issued which represent the right to
          interest only payments or principal only payments.

The grantor trust certificates will either (a) be subject to the "stripped bond"
rules of Section  1286 of the Code or, if the  application  of those  rules to a
particular  series of grantor trust  certificates  is uncertain,  the trust fund
will take the position  that they apply or (b) be subject to some other  section
of the Code as described  in the related  prospectus  supplement.  There is some
uncertainty  as to how  Section  1286 of the Code will be applied to  securities
such as the


                                       93
<PAGE>

grantor  trust  certificates.  Investors  should  consult their own tax advisors
regarding  the treatment of the grantor  trust  certificates  under the stripped
bond rules.

     Although the matter is not entirely clear and alternative characterizations
could be imposed, it appears that each stripped grantor trust certificate should
be considered to be a single debt  instrument  issued on the day it is purchased
for purposes of  calculating  original issue  discount.  Thus, in each month the
holder  of a  grantor  trust  certificate,  whether  a cash  or  accrual  method
taxpayer,  will be required  to report  interest  income from the grantor  trust
certificate equal to the income that accrues on the grantor trust certificate in
that month,  calculated,  in  accordance  with the rules of the Code relating to
original issue discount,  under a constant yield method. In general,  the amount
of the income  reported  in any month  would  equal the  product of the  related
holder's  adjusted  basis in the grantor trust  certificate  at the beginning of
that month (see "--Sales of  Certificates"  below) and the yield of such grantor
trust certificate to that holder. The yield would be the monthly rate,  assuming
monthly  compounding,  determined  as of the date of purchase  that,  if used in
discounting  the remaining  payments on the portion of the assets in the related
trust fund that is allocable to that grantor trust certificate,  would cause the
present value of those payments to equal the price at which the holder purchased
the grantor trust certificate.

     With respect to certain  categories of debt instruments,  the Code requires
the  use of a  reasonable  prepayment  assumption  in  accruing  original  issue
discount  and  provides a method of  adjusting  those  accruals  to account  for
differences between the assumed prepayment rate and the actual rate. These rules
apply to "regular  interests" in a REMIC and are described under  "--Taxation of
Owners  of REMIC  and  FASIT  Regular  Certificates--Original  Issue  Discount."
Regulations  could  be  adopted  applying  these  rules  to  the  grantor  trust
certificates.  Although  the matter is not free from doubt,  it appears that the
Taxpayer  Relief  Act of  1997  has  expanded  the  requirement  of the use of a
reasonable  prepayment  assumption  to  instruments  such as the  grantor  trust
certificates. In the absence of regulations interpreting the application of this
requirement  to those  instruments  particularly  where  those  instruments  are
subject  to the  stripped  bond  rules,  it is  uncertain  whether  the  assumed
prepayment rate would be determined based on conditions at the time of the first
sale of the grantor trust  certificates  or, with respect to any holder,  at the
time of purchase of the grantor trust  certificate by that holder.  Finally,  if
these rules were applied to the grantor trust  certificates,  and the principles
used in  calculating  the amount of original  issue discount that accrues in any
month would produce a negative amount of original issue discount,  it is unclear
when the loss would be allowed.

     In the case of a grantor trust certificate acquired at a price equal to the
principal  amount of the  assets in the  related  trust fund  allocable  to that
grantor trust certificate,  the use of a reasonable  prepayment assumption would
not have any  significant  effect on the yield used in  calculating  accruals of
interest income. In the case, however,  of a grantor trust certificate  acquired
at a discount  or  premium,  that is, at a price  less than or greater  than its
principal amount,  respectively,  the use of a reasonable  prepayment assumption
would  increase or decrease the yield,  and thus  accelerate or  decelerate  the
reporting of interest income, respectively.

     If  the  yield  used  by the  holder  of a  grantor  trust  certificate  in
calculating the amount of interest that accrues in any month is determined based
on  scheduled  payments on the  mortgage  loans,  contracts,  or mortgage  loans
underlying the Mortgage  Certificates  included in the related trust fund,  that
is,  without using a reasonable  prepayment  assumption,  and that grantor trust
certificate  was  acquired at a discount or premium,  then the holder  generally
will  recognize  a net amount of  ordinary  income or loss if a  mortgage  loan,
contract,  or mortgage loan underlying the Mortgage Certificates prepays in full
in an  amount  equal  to the  difference  between  the  portion  of the  prepaid
principal amount of the mortgage loan, contract, or mortgage loan underlying the
Mortgage Certificates that is allocable to the grantor trust certificate and the
portion of the adjusted basis of the grantor trust certificate,  see "--Sales of
Certificates"  below,  that is  allocable  to the mortgage  loan,  contract,  or
mortgage loan underlying the Mortgage  Certificates.  In general, basis would be
allocated among the mortgage loans,  contracts, or mortgage loans underlying the
Mortgage  Certificates  in proportion  to their  respective  principal  balances
determined immediately before the prepayment.  It is not clear whether any other
adjustments would be required or permitted to take account of prepayments of the
mortgage   loans,   contracts,   or  mortgage  loans   underlying  the  Mortgage
Certificates.

     Solely for purposes of reporting  income on the grantor trust  certificates
to the IRS and to certain holders, as required under the Code, it is anticipated
that, unless provided otherwise in the related prospectus supplement,  the yield
of the grantor trust certificates will be calculated based on:

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<PAGE>

     o    a   representative   initial  offering  price  of  the  grantor  trust
          certificates to the public; and

     o    a reasonable  assumed  prepayment rate, which will be the rate used in
          pricing the initial offering of the grantor trust certificates.

The yield may differ  significantly from the yield to any particular holder that
would  be  used  in  calculating  the  interest   income  of  that  holder.   No
representation  is made that the mortgage  loans,  contracts,  or mortgage loans
underlying  the  Mortgage  Certificates  will  in  fact  prepay  at the  assumed
prepayment rate or at any other rate.

     Sales of  Certificates.  Upon  the  sale or  exchange  of a  grantor  trust
certificate, a grantor trust certificateholder will recognize gain or loss equal
to the  difference  between the amount  realized  in the sale and its  aggregate
adjusted basis in the assets  included in the related trust fund  represented by
the grantor trust  certificate.  Generally,  the aggregate  adjusted  basis will
equal  the  grantor  trust   certificateholder's  cost  for  the  grantor  trust
certificate increased by the amount of any previously reported gain with respect
to the  grantor  trust  certificate  and  decreased  by the amount of any losses
previously reported with respect to the grantor trust certificate and the amount
of any  distributions  received on that  grantor  trust  certificate.  Except as
provided above with respect to the original  issue discount and market  discount
rules,  any gain or loss  would be  capital  gain or loss if the  grantor  trust
certificate was held as a capital asset.

     Foreign Investors.  Generally,  interest or original issue discount paid to
or accruing for the benefit of a grantor  trust  certificateholder  who is not a
United States person will be treated as "portfolio  interest" and therefore will
be exempt from the 30%  withholding  tax. That grantor  trust  certificateholder
will be entitled to receive interest payments and original issue discount on the
grantor trust certificates free of United States federal income tax, but only to
the extent the mortgage  loans,  contracts,  or mortgage  loans  underlying  the
Mortgage  Certificates  included in the related trust fund were originated after
July 18, 1984 and provided that the grantor trust certificateholder periodically
provides  the  trustee,  or other  person who would  otherwise  be  required  to
withhold  tax,  with a statement  certifying  under  penalty of perjury that the
grantor trust  certificateholder is not a United States person and providing the
name  and  address  of  the  grantor  trust  certificateholder.  For  additional
information  concerning interest or original issue discount paid to a non-United
States  person  and the  treatment  of a sale or  exchange  of a  grantor  trust
certificate by a non-United  States  person,  which will generally have the same
tax consequences as the sale of a Regular Certificate,  see the discussion above
in "Foreign Investors in Regular Certificates."

                        State and Other Tax Consequences

     In  addition  to  the  federal  income  tax  consequences  described  under
"Material Federal Income Tax Consequences,"  potential investors should consider
the  state  and  local  tax  consequences  of the  acquisition,  ownership,  and
disposition  of the  certificates  offered  hereunder.  State tax law may differ
substantially  from the corresponding  federal tax law, and the discussion above
does not  purport to  describe  any aspect of the tax laws of any state or other
jurisdiction. Therefore, prospective investors should consult their tax advisors
with respect to the various tax  consequences of investments in the certificates
offered hereby.

                              ERISA Considerations

     The Employee  Retirement Income Security Act of 1974, as amended, or ERISA,
imposes  certain  restrictions on ERISA Plans and on those persons who are ERISA
fiduciaries  with respect to the assets of those ERISA Plans. In accordance with
the  general  fiduciary  standards  of ERISA,  an ERISA  Plan  fiduciary  should
consider whether an investment in the certificates is permitted by the documents
and  instruments   governing  the  Plan,  consistent  with  the  Plan's  overall
investment  policy and  appropriate in view of the composition of its investment
portfolio.

     Employee  benefit  plans which are  governmental  plans and certain  church
plans,  if no election has been made under Section  410(d) of the Code,  are not
subject  to  ERISA  requirements.  Accordingly,  assets  of those  plans  may be
invested in the certificates subject to the provisions of applicable federal and
state law and, in the case of any plan which is qualified  under Section  401(a)
of the Code and exempt  from  taxation  under  Section  501(a) of the Code,  the
restrictions imposed under Section 503 of the Code.

                                       95
<PAGE>

     In addition to imposing general fiduciary standards, ERISA and Section 4975
of the Code prohibit a broad range of transactions involving assets of Plans and
Parties in  Interest  and  imposes  taxes  and/or  other  penalties  on any such
transaction  unless an  exemption  applies.  If the  assets of a trust  fund are
treated  for ERISA  purposes  as the assets of the Plans that  purchase  or hold
certificates  of the applicable  series,  an investment in  certificates of that
series by or with "plan  assets" of a Plan  might  constitute  or give rise to a
prohibited  transaction  under  ERISA  or  Section  4975 of the  Code,  unless a
statutory,  regulatory or  administrative  exemption  applies.  Violation of the
prohibited  transaction  rules could  result in the  imposition  of excise taxes
and/or other penalties under ERISA and/or Section 4975 of the Code.

     A number of prohibited transaction class exemptions issued by the DOL might
apply to exempt a prohibited  transaction arising by virtue of the purchase of a
certificate  by or on behalf of, or with "plan  assets"  of a Plan,  i.e.,  PTCE
96-23 (class Exemption for Plan Asset Transactions  Determined by In-House Asset
Managers),  PTCE 95-60  (class  Exemption  for  Certain  Transactions  Involving
Insurance  Company General  Accounts),  PTCE 91-38 (class  Exemption for Certain
Transactions  Involving  Bank  Collective  Investment  Funds),  PTCE 90-1 (class
Exemption for Certain  Transactions  Involving Insurance Company pooled Separate
Accounts) or PTCE 84-14 (class Exemption for Plan Asset Transactions  Determined
by Independent Qualified Professional Asset Managers). There can be no assurance
that any of these class  exemptions  will apply with  respect to any  particular
Plan  certificateholder  or,  even if it  were  to  apply,  that  the  available
exemptive relief would apply to all transactions  involving the applicable trust
fund.

Plan Assets Regulation

     The United States  Department of Labor,  or DOL, has issued the Plan Assets
Regulation.  Unless the Plan Assets  Regulation  provides an exception from this
"plan asset" treatment,  and if that exception is not otherwise  available under
ERISA, an undivided  portion of the assets of a trust fund will be treated,  for
purposes of applying the fiduciary standards and prohibited transaction rules of
ERISA and  Section  4975 of the Code,  as an asset of each Plan which  becomes a
certificateholder of the applicable series. As a result,  transactions involving
the assets of the trust fund will be  subject  to the  fiduciary  responsibility
provisions  of ERISA  and the  prohibited  transaction  provisions  of ERISA and
Section 4975 of the Code. The prohibited transaction exemptions identified above
would not generally  apply to prohibited  transactions  arising in  transactions
involving "plan assets" held in the trust fund.

     The  Plan  Assets  Regulation  provides  an  exception  from  "plan  asset"
treatment  for  securities  issued by an entity if,  immediately  after the most
recent  acquisition of any equity  interest in the entity,  less than 25% of the
value of each class of equity interests in the entity,  excluding interests held
by a person  who has  discretionary  authority  or control  with  respect to the
assets of the entity, or any affiliate of that person, are held by "benefit plan
investors"  --e.g.,  Plans,  governmental,  foreign and other  benefit plans not
subject to ERISA and entities holding assets deemed to be "plan assets." Because
the  availability  of this exemption to any trust fund depends upon the identity
of the  certificateholders of the applicable series at any time, there can be no
assurance  that any  series  or  class of  certificates  will  qualify  for this
exemption.

Underwriter's PTE

     Credit Suisse First Boston  Corporation,  or First Boston, is the recipient
of an  Underwriter's  PTE, which may accord  protection  from  violations  under
Sections  406 and 407 of ERISA  and  Section  4975 of the Code  for  Plans  that
acquire certificates:

      (a)  which represent:

           (1)  a  beneficial  ownership  interest  in the assets of a trust and
                entitle  the  holder  to  pass-through  payments  of  principal,
                interest  and/or other  payments made with respect to the assets
                of the trust; or

           (2)  an  interest in a REMIC if the  certificates  are issued by and
                are obligations of a trust; and

      (b)  with  respect  to  which  the  recipient  underwriter  or  any of its
           affiliates is either the sole underwriter,  the manager or co-manager
           or a selling or placement  agent.  The corpus of a trust to which the
           Underwriter's PTE applies may consist of:

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<PAGE>

           (1)  obligations  which bear interest or are purchased at a discount
                and which are secured by:

                (A)  single-family   residential,   multifamily  residential  or
                     commercial real property,  including obligations secured by
                     leasehold interests on that real property; or

                (B)  shares issued by a cooperative housing association;

           (2)  secured   consumer   receivables  that  bear  interest  or  are
                purchased at a discount;

           (3)  secured credit  instruments that bear interest or are purchased
                at a discount in transactions by or between business  entities;
                and

           (4)  "guaranteed governmental mortgage pool certificates," as defined
                in the Plan Assets Regulation.

     Plans  acquiring  certificates  may be eligible  for  protection  under the
Underwriter's PTE if:

      (a)  assets of the type  included  as assets of a  particular  trust fund
           have been included in other investment pools;

      (b)  certificates  evidencing  interests  in those  other pools have been
           both:

           (1)  rated in one of the three highest generic rating  categories by
                Standard & Poor's Ratings Services,  Moody's Investors Service,
                Inc., Duff & Phelps Inc. or Fitch IBCA, Inc.; and

           (2)  purchased by investors  other than Plans,  for at least one year
                prior to a Plan's  acquisition of  certificates in reliance upon
                the Underwriter's PTE;

      (c)  at the time of the acquisition, the class of certificates acquired by
           the  Plan  has  received  a rating  in one of the  rating  categories
           referred to in condition (b)(1) above;

      (d)  the  trustee is not an  affiliate  of any  member of the  Restricted
           Group;

      (e)  the applicable series of certificates  evidences  ownership in assets
           of  a  particular  trust  fund  which  may  include  non-subordinated
           Mortgage Certificates,  whether or not interest and principal payable
           with respect to the Mortgage Certificates are guaranteed by the GNMA,
           FHLMC or FNMA,  contracts or, if certain conditions  specified in the
           applicable  prospectus   supplement  are  satisfied,   a  Pre-Funding
           Account, but may not include a swap agreement;

      (f)  the class of certificates acquired by the Plan is not subordinated to
           other classes of certificates of that Trust with respect to the right
           to receive payment in the event of defaults or  delinquencies  on the
           underlying assets of the related trust fund;

      (g)  the Plan is an  "accredited  investor," as defined in Rule 501(a)(1)
           of Regulation D under the Securities Act of 1933, as amended;

      (h)  the acquisition of the certificates by a Plan is on terms,  including
           the price for the certificates, that are at least as favorable to the
           Plan  as  they  would  be in an  arm's  length  transaction  with  an
           unrelated party;

      (i)  the  sum  of  all  payments  made  to and  retained  by  the  related
           underwriter  or members of any  underwriting  syndicate in connection
           with the  distribution of the  certificates  represents not more than
           reasonable compensation for underwriting the certificates; the sum of
           all payments made to and retained by the seller  pursuant to the sale
           of the assets of the trust fund to the trust fund represents not more
           than the fair market value of those assets; and

      (j)  the sum of all payments  made to and retained by the servicer and all
           subservicers represents not more than reasonable compensation for the
           related  subservicers'  services  under  the  pooling  and  servicing
           agreement and reimbursement of the related  subservicers'  reasonable
           expenses in connection herewith.

Each series of  certificates  generally  is expected  to satisfy  condition  (a)
above. If stated in the applicable prospectus supplement,  the related series of
certificates  will not satisfy condition (a) above. If a series includes a class
of subordinated  certificates,  that class will not satisfy condition (f) above.
Additionally,  this prospectus permits the

                                       97
<PAGE>


issuance of certificates rated in one of the four highest rating categories,  so
a particular class of a series may not satisfy condition (c) above.

     In addition, the Underwriter's PTE will not apply to a Plan's investment in
certificates if the Plan fiduciary responsible for the decision to invest in the
certificates  is a mortgagor or obligor with respect to more than 5% of the fair
market value of the  obligations  constituting  the assets of the related  trust
fund or an affiliate of that person, unless:

     o    in the case of an acquisition in connection with the initial  issuance
          of any  series  of  certificates,  at  least  50%  of  each  class  of
          certificates  in which  Plans have  invested  is  acquired  by persons
          independent of the Restricted  Group and at least 50% of the aggregate
          interest in the trust fund is acquired by persons  independent  of the
          Restricted Group;

     o    the Plan's investment in any class of certificates does not exceed 25%
          of  the  outstanding  certificates  of  that  class  at  the  time  of
          acquisition;

     o    immediately after the acquisition, no more than 25% of the Plan assets
          with  respect  to which  the  investing  fiduciary  has  discretionary
          authority or renders  investment  advice are invested in  certificates
          evidencing  interests in trusts sponsored or containing assets sold or
          serviced by the same entity; and

     o    the Plan is not sponsored by any of one the Restricted Group.

     Whether the conditions in the Underwriter's PTE will be satisfied as to the
certificates  of any  particular  class will depend upon the relevant  facts and
circumstances existing at the time the Plan acquires the certificates.  Any Plan
investor who proposes to use "plan assets" of a Plan to acquire  certificates in
reliance upon the  Underwriter's PTE should determine whether the Plan satisfies
all of the applicable  conditions and consult with its counsel  regarding  other
factors that may affect the applicability of the Underwriter's PTE.

General Considerations

     Any member of the Restricted Group, a mortgagor or obligor, or any of their
affiliates  might be considered or might become a Party in Interest with respect
to a Plan. In that event,  the  acquisition  or holding of  certificates  of the
applicable  series or class by, on behalf of or with "plan  assets" of that Plan
might be viewed as  giving  rise to a  prohibited  transaction  under  ERISA and
Section 4975 of the Code,  unless the  Underwriter's PTE or another exemption is
available.  Accordingly, before a Plan investor makes the investment decision to
purchase,  to commit to purchase or to hold certificates of any series or class,
the Plan investor should determine:

     o    whether the  Underwriter's  PTE is applicable  and adequate  exemptive
          relief is available;

     o    whether any other prohibited  transaction  exemption,  if required, is
          available under ERISA and Section 4975 of the Code; or

     o    whether an exception  from "plan asset"  treatment is available to the
          applicable trust fund.

The Plan  investor  should  also  consult the ERISA  discussion,  if any, in the
applicable   prospectus   supplement  for  further  information   regarding  the
application of ERISA to any particular certificate.

     Subordinated  certificates  are not available for purchase by or with "plan
assets" of any Plan,  other than an  insurance  company  general  account  which
satisfies  the  conditions  set forth in  Sections  I and III of PTCE 95-60 or a
governmental or church plan which is not subject to ERISA or Section 4975 of the
Code, as described above,  and any acquisition of subordinated  certificates by,
on behalf of or with "plan  assets" of any such Plan will be treated as null and
void for all purposes.

                                       98
<PAGE>

Insurance Company General Accounts

     In addition to any exemption that may be available under PTCE 95-60 for the
purchase  and  holding  of the  certificates  by an  insurance  company  general
account,  the Small  Business  Job  Protection  Act of 1996 added a new  Section
401(c) to ERISA,  which provides certain exemptive relief from the provisions of
Part 4 of  Title  I of  ERISA  and  Section  4975  of the  Code,  including  the
prohibited  transaction  restrictions  imposed by ERISA and the  related  excise
taxes  imposed  by  Section  4975 of the Code,  for  transactions  involving  an
insurance company general account.  The final  regulations  issued under Section
401(c) of ERISA, or the 401(c) Regulations,  provide guidance for the purpose of
determining, in cases where insurance policies or annuity contracts supported by
an insurer's  general  account were issued to or for the benefit of a Plan on or
before December 31, 1998, which general account assets constitute "plan assets."
Pursuant to the 401(c)  Regulations,  when a Plan acquires one of these policies
or  contracts,  the Plan's  assets  include the policy or  contract,  but do not
include any of the  underlying  assets of the insurer's  general  account if the
requirements  of the 401(c)  Regulations are satisfied.  The 401(c)  Regulations
generally  become effective on July 5, 2001,  although  earlier  effective dates
apply with respect to some of the 401(c) Regulation's  requirements.  The 401(c)
Regulations  generally  provide  that,  until July 5, 2001,  no person  shall be
subject to  liability  under Part 4 of Title I of ERISA and Section  4975 of the
Code on the basis of a claim that the  assets of an  insurance  company  general
account constitute "plan assets," except in the following three circumstances:

     o    an action  brought by the  Secretary of Labor for certain  breaches of
          fiduciary  duty which would also  constitute a violation of federal or
          state criminal law;

     o    the application of any federal criminal law; or

     o    a civil action commenced before November 7, 1995.

Any assets of an insurance  company  general  account  which  support  insurance
policies  issued  to a Plan  after  December  31,  1998 or issued to Plans on or
before  December 31, 1998 for which the  insurance  company does not comply with
the 401(c)  Regulations  may be treated as "plan  assets." In addition,  because
Section 401(c) does not relate to insurance company separate accounts,  separate
account  assets are still  treated as "plan assets" of any Plan invested in such
separate account.  Insurance  companies  contemplating the investment of general
account assets in the certificates  should consult with their legal counsel with
respect to the  applicability  of  Sections I and III of PTCE 95-60 and  Section
401(c) or ERISA, including the general account's ability to continue to hold the
certificates after July 5, 2001.

     Any Plan investor who proposes to use "plan assets" of any Plan to purchase
certificates of any series or class should consult with its counsel with respect
to the  potential  consequences  under ERISA and Section 4975 of the Code of the
acquisition and ownership of those certificates.

                                Legal Investment

     The  applicable  prospectus  supplement for a series of  certificates  will
specify  whether a class or  subclass  of those  certificates,  as long as it is
rated in one of the two  highest  rating  categories  by one or more  nationally
recognized statistical rating organizations, will constitute a "mortgage related
security" for purposes of the Secondary Mortgage Market Enhancement Act of 1984,
as amended, or SMMEA. That class or subclass,  if any,  constituting a "mortgage
related security" will be a legal investment for persons, trusts,  corporations,
partnerships,  associations,  business trusts and business  entities,  including
depository  institutions,  insurance  companies,  trustees and state  government
employee retirement  systems,  created pursuant to or existing under the laws of
the United States or of any state, including the District of Columbia and Puerto
Rico, whose  authorized  investments are subject to state regulation to the same
extent that,  under  applicable law,  obligations  issued by or guaranteed as to
principal  and  interest by the United  States or any agency or  instrumentality
thereof constitute legal investments for those entities.

     Pursuant to SMMEA, a number of states enacted  legislation,  on or prior to
the  October 3, 1991  cutoff for  enactments,  limiting  to varying  extents the
ability of certain entities,  in particular,  insurance companies,  to invest in
"mortgage related securities," in most cases by requiring the affected investors
to rely solely upon existing state law,


                                       99
<PAGE>

and not SMMEA.  Accordingly,  the investors  affected by the legislation will be
authorized to invest in certificates qualifying as "mortgage related securities"
only to the extent provided in that legislation.

     SMMEA also amended the legal  investment  authority of  federally-chartered
depository  institutions as follows:  federal savings and loan  associations and
federal savings banks may invest in, sell or otherwise deal in mortgage  related
securities  without  limitation as to the percentage of their assets represented
thereby,  federal  credit  unions may invest in those  securities,  and national
banks may purchase those  securities for their own account without regard to the
limitations generally applicable to investment securities set forth in 12 U.S.C.
24 (Seventh),  subject in each case to any regulations as the applicable federal
regulatory  authority may prescribe.  In this connection,  federal credit unions
should  review  NCUA  Letter to Credit  Unions No. 96, as  modified by Letter to
Credit Unions No. 108, which includes guidelines to assist federal credit unions
in making  investment  decisions for mortgage related  securities.  The NCUA has
adopted  rules,  codified  as 12 C.F.R.  Section  703.5(f)-(k),  which  prohibit
federal  credit unions from  investing in certain  mortgage  related  securities
(including  securities  such  as  certain  series,   classes  or  subclasses  of
certificates), except under limited circumstances.

     The Office of Thrift  Supervision,  or the OTS, has issued Thrift  Bulletin
13a, entitled "Management of Pass-Through Rate Risk, Investment Securities,  and
Derivatives  Activities," or "TB 13a," which is effective as of December 1, 1998
and  applies to thrift  institutions  regulated  by the OTS.  One of the primary
purposes  of TB 13a is to  require  thrift  institutions,  prior to  taking  any
investment position, to:

     o    conduct  a  pre-purchase   portfolio   sensitivity  analysis  for  any
          "significant    transaction"   involving   securities   or   financial
          derivatives; and

     o    conduct a  pre-purchase  price  sensitivity  analysis of any  "complex
          security" or financial derivative.

For the purposes of TB 13a, "complex  security"  includes among other things any
collateralized  mortgage  obligation  or REMIC  security,  other than any "plain
vanilla" mortgage pass-through security,  that is, securities that are part of a
single class of securities in the related pool that are  non-callable and do not
have any special  features.  One or more classes of the certificates  offered by
this  prospectus  and the  accompanying  prospectus  supplement may be viewed as
"complex  securities." The OTS recommends that while a thrift institution should
conduct its own in-house  pre-acquisition  analysis,  it may rely on an analysis
conducted by an independent  third-party as long as management  understands  the
analysis and its key  assumptions.  Further,  TB 13a recommends  that the use of
"complex  securities with high price sensitivity" be limited to transactions and
strategies that lower a thrift  institution's  portfolio  interest rate risk. TB
13a warns that investment in complex  securities by thrift  institutions that do
not have adequate risk measurement, monitoring and control systems may be viewed
by OTS examiners as an unsafe and unsound practice.

     The predecessor to the OTS issued a bulletin entitled "Mortgage  Derivative
Products and Mortgage Swaps" applicable to thrift institutions  regulated by the
OTS.  The  bulletin  established   guidelines  for  the  investment  by  savings
institutions  in  certain  "high-risk"   mortgage   derivative   securities  and
limitations  on the use of those  securities by insolvent,  undercapitalized  or
otherwise "troubled" institutions.  According to the bulletin, these "high-risk"
mortgage   derivative   securities  include  securities  such  as  the  Class  B
Certificates.  Similar policy  statements have been issued by regulators  having
jurisdiction over other types of depository institutions.

     On April 23, 1998, the Federal Financial  Institutions  Examination Council
issued its 1998 Policy Statement.  The 1998 Policy Statement has been adopted by
the Federal Reserve Board,  the Office of the  Comptroller of the Currency,  the
FDIC, the National Credit Union Administration, or the NCUA, and the OTS with an
effective date of May 26, 1998. The 1998 Policy Statement rescinds a 1992 policy
statement  that had required,  prior to purchase,  a depository  institution  to
determine whether a mortgage derivative product that it is considering acquiring
is  high-risk,  and,  if so,  that the  proposed  acquisition  would  reduce the
institution's  overall interest rate risk. The 1998 Policy Statement  eliminates
former  constraints  on investing  in certain  "high-risk"  mortgage  derivative
products and  substitutes  broader  guidelines  for  evaluating  and  monitoring
investment risk.

     Institutions  whose  investment  activities  are subject to  regulation  by
federal or state  authorities  should  review  rules,  policies  and  guidelines
adopted from time to time by those authorities before purchasing any


                                      100
<PAGE>

certificates,  as certain series, classes or subclasses may be deemed unsuitable
investments,  or may  otherwise be  restricted,  under those rules,  policies or
guidelines, in certain instances irrespective of SMMEA.

     The  foregoing  does not  take  into  consideration  the  applicability  of
statutes,  rules,  regulations,   orders,  guidelines  or  agreements  generally
governing investments made by a particular investor,  including, but not limited
to, "prudent investor" provisions, percentage-of-assets limits, provisions which
may  restrict or  prohibit  investment  in  securities  which are not  "interest
bearing" or "income  paying,"  and,  with regard to any  certificates  issued in
book-entry  form,  provisions  which may  restrict  or prohibit  investments  in
securities which are issued in book-entry form.

     Except as to the status of certain  classes of  certificates  as  "mortgage
related securities," no representation is made as to the proper characterization
of  the  certificates  for  legal  investment  purposes,  financial  institution
regulatory  purposes,  or other  purposes,  or as to the  ability of  particular
investors  to  purchase   certificates   under   applicable   legal   investment
restrictions.  The  uncertainties  described above,  and any unfavorable  future
determinations  concerning legal investment or financial institution  regulatory
characteristics  of the certificates,  may adversely affect the liquidity of the
certificates.

     Investors should consult their own legal advisers in determining whether
and to what extent certificates  offered by this prospectus and the accompanying
prospectus supplement constitute legal investments for them.

                              Plan of Distribution

     Each  series of  certificates  offered  hereby and by means of the  related
prospectus  supplement  may be sold  directly by the depositor or may be offered
through Credit Suisse First Boston  Corporation,  an affiliate of the depositor,
or   underwriting   syndicates   represented   by  Credit  Suisse  First  Boston
Corporation.   The  prospectus   supplement  with  respect  to  each  series  of
certificates  will  set  forth  the  terms of the  offering  of that  series  of
certificates  and each subclass within that series,  including the name or names
of the  underwriters,  the  proceeds  to the  depositor,  and either the initial
public offering price, the discounts and commissions to the underwriters and any
discounts or concessions  allowed or reallowed to certain dealers, or the method
by which the price at which the underwriters  will sell the certificates will be
determined.

     Generally,  the  underwriters  will be  obligated  to  purchase  all of the
certificates of a series described in the prospectus  supplement with respect to
that series if any certificates are purchased.  The certificates may be acquired
by the underwriters for their own account and may be resold from time to time in
one or more transactions,  including negotiated transactions,  at a fixed public
offering price or at varying prices determined at the time of sale. If stated in
the applicable prospectus supplement,  the underwriters will not be obligated to
purchase  all  of the  certificates  of a  series  described  in the  prospectus
supplement with respect to that series if any certificates are purchased.

     If  stated in the  prospectus  supplement,  the  depositor  will  authorize
underwriters or other persons acting as the depositor's agents to solicit offers
by certain institutions to purchase the certificates from the depositor pursuant
to contracts  providing for payment and delivery on a future date.  Institutions
with which those  contracts may be made include  commercial  and savings  banks,
insurance  companies,  pension  funds,  investment  companies,  educational  and
charitable  institutions and others, but in all cases those institutions must be
approved by the depositor.  The  obligation of any purchaser  under any contract
will be subject to the condition  that the purchase of the offered  certificates
shall  not at  the  time  of  delivery  be  prohibited  under  the  laws  of the
jurisdiction  to which that  purchaser is subject.  The  underwriters  and other
agents  will  not  have  any  responsibility  in  respect  of  the  validity  or
performance of those contracts.

     The  depositor  may also  sell the  certificates  offered  by means of this
prospectus  and  the  related  prospectus  supplements  from  time  to  time  in
negotiated  transactions or otherwise, at prices determined at the time of sale.
The  depositor  may effect  those  transactions  by selling  certificates  to or
through  dealers,  and those  dealers  may receive  compensation  in the form of
underwriting  discounts,  concessions or commissions  from the depositor and any
purchasers of certificates for whom they may act as agents.

                                      101
<PAGE>

     The place and time of  delivery  for each  series of  certificates  offered
hereby and by means of the related  prospectus  supplement  will be set forth in
the prospectus supplement with respect to that series.

     If and  to the  extent  required  by  applicable  law or  regulation,  this
prospectus  and the  attached  prospectus  supplement  will  also be used by the
underwriter  after the completion of the offering in connection  with offers and
sales related to market-making transactions in the offered certificates in which
the  underwriter  acts as  principal.  Sales will be made at  negotiated  prices
determined at the time of sales.

                                  Legal Matters

     Certain legal matters in connection  with the  certificates  offered hereby
will be  passed  upon for the  depositor  and for the  underwriters  by  Orrick,
Herrington & Sutcliffe  LLP, New York,  New York or by such other counsel as may
be identified in the related prospectus supplement.

                              Financial Information

     The depositor has determined that its financial statements are not material
to the offering made hereby. The certificates do not represent an interest in or
an obligation of the depositor. The depositor's only obligations for a series of
certificates  will be to  repurchase  certain  loans on any  breach  of  limited
representations  and warranties made by the depositor,  or as otherwise provided
in the applicable prospectus supplement.

                             Additional Information

     The depositor has filed the registration  statement with the Securities and
Exchange  Commission.  The depositor is also subject to some of the  information
requirements of the Securities Exchange Act of 1934, as amended, or the Exchange
Act, and,  accordingly,  will file reports  thereunder  with the  Securities and
Exchange  Commission.  The registration  statement and the exhibits thereto, and
reports and other  information filed by the depositor under the Exchange Act can
be inspected  and copied at the public  reference  facilities  maintained by the
Securities and Exchange Commission at 450 Fifth Street, N.W.,  Washington,  D.C.
20549,  and at certain of its  Regional  Offices  located  as  follows:  Chicago
Regional Office,  Citicorp Center, 500 West Madison Street, Suite 1400, Chicago,
Illinois 60661-2511;  and Northeast Regional Office, 7 World Trade Center, Suite
1300,  New York,  New York 10048 and  electronically  through the Securities and
Exchange Commission's  Electronic Data Gathering,  Analysis and Retrieval System
at the Securities and Exchange Commission's Web Site (http://www.sec.gov).

                          Reports to Certificateholders

     Monthly reports which contain  information  concerning the trust fund for a
series  of  certificates  will be  sent by or on  behalf  of the  servicer,  the
subservicer or the trustee to each holder of record of the  certificates  of the
related   series.   See   "Description   of   the    Certificates--Reports    to
Certificateholders."   Reports  forwarded  to  holders  will  contain  financial
information  that  has  not  been  examined  or  reported  on by an  independent
certified  public  accountant.  The depositor  will file with the Securities and
Exchange  Commission  those  periodic  reports  relating to the trust fund for a
series of certificates as are required under the Exchange Act.

               Incorporation of Certain Information by Reference

     The SEC allows the depositor to  "incorporate by reference" the information
filed with the SEC by the depositor,  under Section 13(a), 13(c), 14 or 15(d) of
the  Exchange  Act,  that relates to the trust fund for the  certificates.  This
means that the depositor can disclose  important  information to any investor by
referring  the investor to these  documents.  The  information  incorporated  by
reference is an important part of this prospectus,  and information filed by the
depositor  with  the SEC that  relates  to the  trust  fund  for any  series  of
certificates will automatically update and supersede this information. Documents
that may be  incorporated  by reference for a particular  series of certificates
include an insurer's  financials,  a certificate  policy,  mortgage pool policy,
computational  materials,  collateral  term  sheets,  the  related  pooling  and
servicing agreement and amendments

                                      102
<PAGE>

thereto,  other  documents on Form 8-K and Section 13(a),  13(c), 14 or 15(d) of
Exchange Act as may be required in connection with the related trust fund.

     The depositor  will provide or cause to be provided  without charge to each
person  to whom  this  prospectus  and  accompanying  prospectus  supplement  is
delivered in connection  with the offering of one or more classes of the related
series of certificates, on written or oral request of that person, a copy of any
or all reports incorporated in this prospectus by reference, in each case to the
extent the reports relate to one or more of the classes of the related series of
certificates,  other than the exhibits to those  documents,  unless the exhibits
are specifically incorporated by reference in the documents.  Requests should be
directed in writing to Credit Suisse First Boston Mortgage  Securities Corp., 11
Madison Avenue, New York, New York 10010, Attention: Treasurer.

                                     Ratings

     It is a  condition  to the  issuance  of the  certificates  of each  series
offered hereby that at the time of issuance they shall have been rated in one of
the four highest  rating  categories by the  nationally  recognized  statistical
rating agency or agencies specified in the related prospectus supplement.

     Ratings on conduit mortgage and manufactured housing contract  pass-through
certificates  address the  likelihood  of the receipt by  certificateholders  of
their  allocable  share of principal and interest on the underlying  mortgage or
manufactured housing contract assets. These ratings address:

     o    structural and legal aspects associated with the certificates;

     o    the extent to which the  payment  stream on the  underlying  assets is
          adequate to make payments required by the certificates; and

     o    the credit quality of the credit enhancer or guarantor, if any.

     Ratings  on the  certificates  do  not,  however,  constitute  a  statement
regarding:

     o    the likelihood of principal prepayments by mortgagors or obligors;

     o    the degree by which  prepayments  made by mortgagors or obligors might
          differ from those originally anticipated; or

     o    whether the yield originally anticipated by investors of any series of
          certificates   may  be  adversely   affected  as  a  result  of  those
          prepayments.

     As a result,  investors of any series of certificates  might suffer a lower
than anticipated yield.

     A rating on any or all of the  certificates  of any series by certain other
rating  agencies,  if assigned  at all,  may be lower than the rating or ratings
assigned to the  certificates by the rating agency or agencies  specified in the
related prospectus supplement. A security rating is not a recommendation to buy,
sell or hold  certificates  and may be subject to revision or  withdrawal at any
time by the assigning  rating agency.  Each security  rating should be evaluated
independently of any other security rating.

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<PAGE>

                                    Glossary

     Below are abbreviated  definitions of significant capitalized terms used in
this prospectus and in the accompanying  prospectus supplement.  The pooling and
servicing agreement for the related series may contain more complete definitions
of the  terms  used in this  prospectus  and in the  prospectus  supplement  and
reference should be made to the pooling and servicing  agreement for the related
series for a more complete understanding of all such terms.

     "1998 Policy Statement" means the revised supervisory statement listing the
guidelines for  investments in "high risk mortgage  securities,"  and adopted by
the Federal Reserve Board,  the Office of the  Comptroller of the Currency,  the
FDIC,  the  National  Credit Union  Administration,  or NCUA and the OTS with an
effective date of May 26, 1998.

     "401(c)  Regulations"  means the  regulations  the DOL is required to issue
under Section 401(c) of ERISA, which were published in proposed form on December
22, 1997.

     "Accrual  Distribution  Amount" means the amount of the  interest,  if any,
that has accrued but is not yet payable on the Compound Interest Certificates of
a  particular  series  since  the  prior  distribution  date,  or since the date
specified  in the  related  prospectus  supplement  in  the  case  of the  first
distribution date.

     "Advance" means as to a particular mortgage loan, contract or mortgage loan
underlying a Mortgage  Certificate and any distribution date, an amount equal to
the scheduled payments of principal and interest at the applicable mortgage rate
or annual percentage rate, as applicable,  which were delinquent as of the close
of business on the business day preceding the Determination Date on the mortgage
loan, contract or mortgage loan underlying a Mortgage Certificate.

     "Alternative  Credit  Support"  means  additional or  alternative  forms of
credit support,  including a guarantee or surety bond, acceptable to the related
Rating Agency.

     "Approved  Sale"  means,  with  respect to a series  which  utilizes a pool
insurance policy:

     o    the sale of a mortgaged  property acquired because of a default by the
          mortgagor to which the related pool insurer has given prior approval;

     o    the  foreclosure or trustee's sale of a mortgaged  property at a price
          exceeding the maximum amount specified by the related pool insurer;

     o    the acquisition of the mortgaged property under the primary insurance
          policy by the primary mortgage insurer; or

     o    the acquisition of the mortgaged property by the pool insurer.

     "Buy-Down  Fund"  means with  respect to any series,  a  custodial  account
established by the related  subservicer,  subservicer or trustee as described in
the related  prospectus  supplement,  which  contains  amounts  deposited by the
depositor,  the seller of the related  mortgaged  property,  the  subservicer or
another  source to cover  shortfalls  in  payments  created  by  Buy-Down  Loans
included in the related mortgage pool.

     "Buy-Down  Loans" means single family  mortgage loans pursuant to which the
monthly  payments made by the related  mortgagor  during the early years of that
mortgage loan will be less than the scheduled  monthly payments on that mortgage
loan.

     "Certificate  Account"  means,  with respect to each  series,  the separate
account or accounts in the name of the trustee,  which must be maintained with a
depository institution and in a manner acceptable to the related Rating Agency.

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<PAGE>

     "Certificate  Principal Balance" means, for any class of certificates,  and
as of any  distribution  date,  the initial  principal  balance of that class of
certificates,  less all amounts previously  distributed to holders of that class
of certificates, as applicable, on account of principal.

     "Code" means the Internal Revenue Code of 1986, as amended.

     "Compound  Interest  Certificates"  means certificates that accrue interest
during  certain  periods  that is not  paid to the  holder  but is  added to the
Certificate Principal Balance of the certificate.

     "Cooperative"  means a  corporation  entitled  to be  treated  as a housing
cooperative under federal tax law.

     "Cooperative  Dwelling" means a specific  dwelling unit in a building owned
by a Cooperative.

     "Cooperative  Loan" means a cooperative  apartment loan evidenced by a note
secured a by security  interest  in shares  issued by a  Cooperative  and in the
related  proprietary lease or occupancy  agreement  granting exclusive rights to
occupy a Cooperative Dwelling.

     "Custodial  Account"  means,  with  respect to each  series,  the  separate
account or accounts in the name of the  trustee,  meeting the  requirements  set
forth in this prospectus for the Certificate Account.

     "Cut-off  Date"  means,  the  date  specified  in  the  related  prospectus
supplement from which principal and interest payments on the assets of the trust
fund related to a series are transferred to that trust fund.

     "Determination   Date"  means,   with  respect  to  each  series  and  each
distribution  date,  the 20th day, or if the 20th day is not a business day, the
next  preceding  business  day, of the month of in which the  distribution  date
occurs, or some other day if stated in the related prospectus supplement.

     "Disqualified Organization" means:

     o    the United States,  any state or political  subdivision  thereof,  any
          foreign government, any international  organization,  or any agency or
          instrumentality    of   the   foregoing,    but   does   not   include
          instrumentalities described in Section 168(h)(2)(D) of the Code;

     o    any organization, other than a cooperative described in Section 521 of
          the Code, that is exempt from federal income tax, unless it is subject
          to the tax imposed by Section 511 of the Code; or

     o    any organization described in Section 1381(a)(2)(C) of the Code.

     "Due Period"  means,  with respect to any  distribution  date, the calendar
month  preceding the month of that  distribution or some other period as defined
in the related prospectus supplement.

     "Eligible  Investments"  means  any of  the  following,  in  each  case  as
determined at the time of the investment or contractual  commitment to invest in
that Eligible Investment:

     o    obligations  which  have the  benefit  of full faith and credit of the
          United States of America,  including  depositary  receipts issued by a
          bank as custodian with respect to any such instrument or security held
          by the  custodian  for the  benefit of the  holder of such  depositary
          receipt;

     o    demand  deposits or time deposits in, or bankers'  acceptances  issued
          by, any depositary institution or trust company incorporated under the
          laws of the United  States of America or any state thereof and subject
          to  supervision  and  examination  by  Federal  or  state  banking  or
          depositary institution  authorities;  provided that at the time of the
          trustee's  investment  or  contractual  commitment  to  invest in that
          Eligible  Investment,   the  certificates  of  deposit  or  short-term
          deposits, if any, or long-term unsecured debt obligations,  other than
          obligations  whose rating is based on collateral or on the credit of a
          Person  other  than  such  institution  or  trust  company,   of  that
          depositary  institution  or trust  company has a credit  rating in the
          highest rating category from the related Rating Agency;

     o    certificates of deposit having a rating in the highest rating from the
          related Rating Agency;

                                      105
<PAGE>

     o    investments  in money  market  funds  which are  rated in the  highest
          category  from the  related  Rating  Agency or which are  composed  of
          instruments  or other  investments  which  are  rated  in the  highest
          category from the related Rating Agency;

     o    commercial paper,  having original or remaining  maturities of no more
          than 270 days,  having  credit rating in the highest  rating  category
          from the related Rating Agency;

     o    repurchase  agreements  involving any Eligible Investment described in
          any of the first three bullet points above, so long as the other party
          to  the  repurchase   agreement  has  its  long-term   unsecured  debt
          obligations  rated in the  highest  rating  category  from the related
          Rating Agency;

     o    any other  investment  with respect to which the related Rating Agency
          indicates  will not result in the  reduction or withdrawal of its then
          existing rating of the certificates; or

     o    other  investments  that are  described in the  applicable  prospectus
          supplement.

Except as otherwise provided in the applicable pooling and servicing  agreement,
any Eligible  Investment must mature no later than the business day prior to the
next distribution date.

     "ERISA  Plans"  means  employee  benefit  plans  subject  to  the  Employee
Retirement Income Security Act of 1974, or ERISA.

     "FASIT"  means a  "financial  asset  securitization  trust" as described in
section 860L of the Code.

     "FASIT  Regular  Certificates"  means  certificates  or notes  representing
ownership of one or more regular interests in a FASIT.

     "FHA  Loans"  means  mortgage  loans or  contracts  insured by the  Federal
Housing Administration.

     "GPM  Fund"  means  with  respect  to  any  series,  a  custodial   account
established by the related servicer,  subservicer or trustee as described in the
related prospectus supplement, which contains amounts deposited by the depositor
or another source to cover  shortfalls in payments created by GPM Loans included
in the related mortgage pool.

     "GPM  Loans"  means  single  family  mortgage  loans  pursuant to which the
monthly payments by the related  mortgagor during the early years of the related
Mortgage  Note are less than the  amount of  interest  that would  otherwise  be
payable thereon, with that interest paid from amounts on deposit in a GPM Fund.

     "High Cost  Loans"  means  mortgage  loans,  contracts  or  mortgage  loans
underlying  Mortgage  Certificates  that  are  subject  to  the  special  rules,
disclosure  requirements  and other  provisions  that were added to the  federal
Truth-in-Lending  Act by the  Homeownership  and Equity  Protection Act of 1994,
which were originated on or after October 1, 1995, are not loans made to finance
the  purchase  of the  mortgaged  property  and have  mortgage  rates or  annual
percentage  rates, as applicable,  or origination  costs in excess of prescribed
levels.

     "Initial  Deposit"  means,  with  respect to each series in which a reserve
fund has been  established,  the  deposit of cash into the  reserve  fund in the
amount specified in the related prospectus supplement.

     "Insurance Proceeds" means, with respect to each series,  proceeds from any
special  hazard  insurance  policy,   primary  mortgage  insurance  policy,  FHA
insurance, VA guarantee, mortgagor bankruptcy bond or pool insurance policy with
respect to the related  series of  certificates  and any title,  hazard or other
insurance  policy  covering  any of the mortgage  loans  included in the related
mortgage pool, to the extent those  proceeds are not applied to the  restoration
of the  related  property  or  released  to the  mortgagor  in  accordance  with
customary servicing procedures.

     "Issue   Premium"   means  with  respect  to  a  class  of  REMIC   Regular
Certificates,  the issue price in excess of the stated  redemption price of that
class.

                                      106
<PAGE>

     "Liquidating Loan" means:

     o    each mortgage loan with respect to which foreclosure  proceedings have
          been commenced and the mortgagor's right of reinstatement has expired;

     o    each  mortgage loan with respect to which the related  subservicer  or
          the  servicer  has agreed to accept a deed to the  property in lieu of
          foreclosure;

     o    each   Cooperative  Loan  as  to  which  the  shares  of  the  related
          Cooperative and the related  proprietary lease or occupancy  agreement
          have been sold or offered for sale; or

     o    each contract with respect to which repossession proceedings have been
          commenced.

     "Liquidation Proceeds" means, with respect to each series, all cash amounts
received and retained in connection with the  liquidation of defaulted  mortgage
loans,  by foreclosure or otherwise,  other than  Insurance  Proceeds,  payments
under any applicable financial guaranty insurance policy,  surety bond or letter
of credit or proceeds of any Alternative Credit Support, if any, with respect to
the related series.

     "Mixed-Use  Mortgage  Loans"  means  mortgage  loans  secured by  Mixed-Use
Property.

     "Mixed-Use Property" means mixed residential and commercial properties.

     "Mortgage  Certificates" means certain conventional  mortgage  pass-through
certificates  issued by one or more trusts  established  by one or more  private
entities  and  evidencing  the  entire  or a  fractional  interest  in a pool of
mortgage loans.

     "Mortgage  Note" means with respect to each mortgage  loan,  the promissory
note  secured  by a first  or more  junior  mortgage  or deed of  trust or other
similar security instrument creating a first or more junior lien, as applicable,
on the related mortgaged property.

     "Parties in Interest"  means  certain  persons who have  certain  specified
relationships to a Plan, as described in Section 3(14) of ERISA and Section 4975
of the Code.

     "Pass-Through  Entity" means any regulated investment company,  real estate
investment  trust,  trust,  partnership or other  entities  described in Section
860E(e)(6)  of the  Code.  In  addition,  a  person  holding  an  interest  in a
Pass-Through Entity as a nominee for another person will, for that interest,  be
treated as a Pass-Through Entity.

     "Pass-Through  Rate" means with respect to each class of  certificates in a
series,  the rate of interest  borne by that class as  described  in the related
prospectus supplement.

     "Percentage  Interest"  means,  as to any  certificate  of any  class,  the
percentage  interest  evidenced thereby in distributions  required to be made on
the certificates in that class,  which percentage  interest will be based on the
original principal balance or notional amount of the certificates of that class.

     "Permitted Investments" means United States government securities and other
investment  grade  obligations  specified in the related  pooling and  servicing
agreement.

     "Plan  Assets  Regulation"  means the final  regulation  made by the United
States  Department of Labor,  or DOL, under which assets of an entity in which a
Plan makes an equity  investment will be treated as assets of the investing Plan
in certain circumstances.

     "Plans"  means ERISA Plans and other plans  subject to Section  4975 of the
Code.

     "Rating Agency" means, collectively,  the nationally recognized statistical
rating agency or agencies rating the related series of certificates.

                                      107
<PAGE>

     "Realized Loss" means any shortfall  between the unpaid  principal  balance
and accrued  interest on a mortgage loan,  after  application of all Liquidation
Proceeds,  Insurance  Proceeds and other amounts received in connection with the
liquidation  of that  mortgage  loan,  net of  reimbursable  costs and expenses,
including Advances.

     "Record Date" means, with respect to each  distribution  date, the close of
business  on  the  last  day  of  the  calendar  month   preceding  the  related
distribution  date,  or such other date as specified  in the related  prospectus
supplement.

     "Regular  Certificate" means a REMIC Regular Certificate or a FASIT Regular
Certificate, as applicable.

     "REMIC" means a "real estate mortgage investment conduit" as defined in
the Code.

     "REMIC  Regular  Certificates"  means  certificates  or notes  representing
ownership of one or more regular interests in a REMIC.

     "Required Reserve" means the amount specified in the prospectus supplement
for a series of certificates which utilizes a reserve fund, to be deposited into
the reserve fund.

     "Residual  Certificates"  means  one  or  more  classes  or  subclasses  of
certificates of a series that evidence a residual  interest in the related trust
fund.

     "Restricted Group" means the depositor,  any underwriter,  the trustee, any
subservicer, any pool, special hazard or primary mortgage insurer or the obligor
under any other credit support mechanism, a mortgagor or obligor with respect to
obligations  constituting  more than 5% of the aggregate  unamortized  principal
balance  of the  assets of the  related  trust  fund on the date of the  initial
issuance of certificates, or any of their affiliates.

     "Servicing  Account" means the separate account or accounts  established by
each  subservicer for the deposit of amounts received in respect of the mortgage
loans,  contracts  or  mortgage  loans  underlying  the  Mortgage  Certificates,
serviced by that subservicer.

     "Simple  Interest  Loans" means  mortgage loans that provide that scheduled
interest and principal  payments  thereon are applied first to interest  accrued
from the last date to which  interest  has been paid to the date the  payment is
received and the balance thereof is applied to principal.

     "Subordinated  Amount"  means the amount of  subordination  with respect to
subordinated  certificates  stated in the  prospectus  supplement  relating to a
series of certificates that contains subordinate certificates.

     "Trust Assets" means with respect to each series of certificates, the
mortgage loans, contracts or Mortgage Certificates conveyed to the related trust
fund.

     "Underwriter's PTE" means the final prohibited transaction exemption issued
to First Boston, 54 Fed. Reg. 42597 (Oct. 17, 1989), as amended by PTE 97-34, 62
Fed. Reg. 39021 (July 21, 1997).

     "VA Loans" means  mortgage loans or contracts  partially  guaranteed by the
United States Department of Veterans Affairs.

                                      108
<PAGE>





                                     PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS



Other Expenses of Issuance and Distribution (Item 14 of Form S-3).

     The expenses  expected to be incurred in  connection  with the issuance and
distribution  of  the  Securities  being  registered,  other  than  underwriting
compensation,  are as set  forth  below.  All  such  expenses,  except  for  the
registration and filing fee, are estimated.

<TABLE>
<S>                                                        <C>

- - - - - - - - ------------------------------------------------- -----------------------------------------------
Filing Fee for Registration Statement             $         264
- - - - - - - - ------------------------------------------------- -----------------------------------------------
Legal Fees and Expenses                           $     150,000
- - - - - - - - ------------------------------------------------- -----------------------------------------------
Accounting Fees and Expenses                      $      30,000
- - - - - - - - ------------------------------------------------- -----------------------------------------------
Trustee's Fees and Expenses                       $      25,000
   (including counsel fees)
- - - - - - - - ------------------------------------------------- -----------------------------------------------
Printing and Engraving Expenses                   $      15,000
- - - - - - - - ------------------------------------------------- -----------------------------------------------
Rating Agency Fees                                $      80,000
- - - - - - - - ------------------------------------------------- -----------------------------------------------
Miscellaneous                                     $      20,000

- - - - - - - - ------------------------------------------------- -----------------------------------------------
Total                                             $     320,264
- - - - - - - - ------------------------------------------------- -----------------------------------------------
</TABLE>


Indemnification of Directors and Officers (Item 15 of Form S-3).

Article 5 of the Restated  Certificate  of  Incorporation  of the  Depositor and
Article X of the  By-Laws  of the  Depositor  provide  for the  indemnification,
within the  limits  permitted  by the  General  Corporation  Law of the State of
Delaware, of directors,  officers,  employees, and agents of the Corporation and
of persons  who serve other  enterprises  in such or similar  capacities  at the
request of the  Corporation,  against  expenses,  including  attorney's fees and
liabilities for actions they take in such capacities.

Subsection  (a) of  Section  145  of the  General  Corporation  Law of  Delaware
empowers  a  corporation  to  indemnify  any  person who was or is a party or is
threatened to be made a party to any  threatened,  pending or completed  action,
suit or proceeding,  whether civil,  criminal,  administrative  or investigative
(other  than an action by or in the right of the  corporation)  by reason of the
fact  that he is or was a  director,  officer,  employee  or  agent  of  another
corporation  or is or  was  serving  at the  request  of  the  corporation  as a
director, officer, employee or agent of another corporation,  partnership, joint
venture,  trust or other  enterprise,  against  expenses  (including  attorneys'
fees), judgments, fines and amounts paid in settlement,  actually and reasonably
incurred by him or her in connection with such action,  suit or proceeding if he
or she acted in good faith and in a manner he or she  reasonably  believed to be
in or not opposed to the best interests of the corporation,  and with respect to
any criminal  action or  proceeding,  had no cause to believe his or her conduct
was unlawful.



                                      II-1
<PAGE>

Subsection (b) of Section 145 empowers a corporation to indemnify any person who
was or is a party or is threatened to be made a party to any threatened, pending
or completed  action or suit by or in the right of the  corporation to procure a
judgment in its favor by reason of the fact that such person acted in any of the
capacities  set  forth  above,  against  expenses  (including  attorneys'  fees)
actually  and  reasonably  incurred  by him in  connection  with the  defense or
settlement  of such  action or suit if he acted in good faith and in a manner he
reasonably  believed  to be in or not  opposed  to  the  best  interests  of the
corporation  and except  that no  indemnification  may be made in respect to any
claim,  issue or matter as to which such person  shall have been  adjudged to be
liable  to the  corporation  unless  and only to the  extent  that the  Court of
Chancery or the court in which such action or suit was brought  shall  determine
that despite the  adjudication of liability such person is fairly and reasonably
entitled to indemnify for such expenses which the court shall deem proper.

Section 145 further provides that to the extent a director, officer, employee or
agent of a corporation has been successful in the defense of any action, suit or
proceeding  referred  to in  subsections  (a) and (b) or in the  defense  of any
claim,  issue  or  matter  therein,  he shall be  indemnified  against  expenses
(including   attorney's  fees)  actually  and  reasonably  incurred  by  him  in
connection  therewith;  that indemnification or advancement of expenses provided
for by Section 145 shall not be deemed  exclusive  of any other  rights to which
the indemnified party may be entitled;  and empowers the corporation to purchase
and maintain  insurance on behalf of a director,  officer,  employee or agent of
the corporation against any liability asserted against him or incurred by him in
any such  capacity  or  arising  out of his  status as such  whether  or not the
corporation would have the power to indemnify him against such liabilities under
Section 145. Reference is made to Exhibit 3.1 of this Registration Statement for
the complete text of the Restated  Certificate of Incorporation and reference is
made to Exhibit 3.2 of this Registration  Statement for the complete text of the
By-laws.

The ultimate parent of the Depositor carries directors' and officers'  liability
insurance  that covers  certain  liabilities  and  expenses  of the  Depositor's
directors and officers.

Any  underwriters  who execute an  Underwriting  Agreement  in the form filed as
Exhibit  1.1  to  this  Registration  Statement  will  agree  to  indemnify  the
Registrants'  directors and its officers who signed this Registration  Statement
against certain  liabilities  which might arise under the Securities Act of 1933
from certain  information  furnished to the  Registrant  by or on behalf of such
indemnifying party. For provisions  regarding the indemnification of controlling
persons, directors and officers of the Depositor by Underwriters against certain
liabilities, including liabilities under the Securities Act of 1933, as amended,
reference  is made to the  proposed  form of  Underwriting  Agreement  filed  as
Exhibit 1.1 to this Registration Statement.



                                      II-2
<PAGE>


Exhibits (Item 16 of Form S-3).

(a) Financial Statement filed as part of the Registration Statement: none

(b)   Exhibits:


EXHIBIT
NUMBER                 DESCRIPTION
- - - - - - - - ---------              -----------
 1.1             Form of Underwriting Agreement
 3.1             Restated Certificate of Incorporation
                 of Depositor
 3.2             By-laws of Depositor
 4.1             Form of Pooling and Servicing Agreement
 4.2             Form of Sale and Purchase Agreement
 4.3             Form of Trust Agreement
 5.1             Opinion of Orrick, Herrington &
                 Sutcliffe LLP with respect to certain
                 matters involving the Certificates
 8.1             Opinion of Orrick, Herrington &
                 Sutcliffe LLP as to tax matters
 23.1            Consent of Orrick, Herrington &
                 Sutcliffe LLP (included as part of
                 Exhibits 5.1 and 8.1)
 24.1            Power of Attorney
 24.2            Certified Copy of the Resolutions of
                 the Board of Directors of Depositor




                                      II-3
<PAGE>

Undertakings

In accordance  with Item 512 of Regulation S-K under the Securities Act of 1933,
the undersigned registrant hereby undertakes:

(1) To file,  during  any  period in which  offers or sales  are being  made,  a
post-effective amendment to this Registration Statement:

     (i)  to  include  any  prospectus  required  by  Section  10(a)  (3) of the
Securities Act of 1933;

     (ii) to reflect in the  Prospectus  any facts or events  arising  after the
effective date of the Registration  Statement (or the most recent post-effective
amendment  thereof)  which,  individually  or  in  the  aggregate,  represent  a
fundamental  change in the information set forth in the Registration  Statement.
Notwithstanding the foregoing,  any increase or decrease in volume of securities
offered (if the total dollar value of  securities  offered would not exceed that
which  was  registered)  and any  deviation  from  the  low or  high  and of the
estimated  maximum  offering  range may be reflected  in the form of  prospectus
filed with the  Commission  pursuant  to Rule 424(b) if, in the  aggregate,  the
changes in volume  and price  represent  no more than 20  percent  change in the
maximum  aggregate  offering price set forth in the "Calculation of Registration
Fee" table in the effective registration statement.

     (iii)to  include  any  material  information  with  respect  to the plan of
distribution  not  previously  disclosed  in the  Registration  Statement or any
material change to such information in the Registration Statement.

(2) That, for the purpose of determining  any liability under the Securities Act
of  1933,  each  such  post-effective  amendment  shall  be  deemed  to be a new
registration  statement  relating to the  securities  offered  therein,  and the
offering of such  securities at that time shall be deemed to be the initial bona
fide offering thereof.

(3) To remove from  registration by means of a  post-effective  amendment any of
the securities  being  registered  which remain unsold at the termination of the
offering.

     (b)  As to documents subsequently filed that are incorporated by reference:

The undersigned  registrant  hereby  undertakes that, for purpose of determining
any liability under the Securities Act of 1933, each filing of the  registrant's
annual  report  pursuant  to Section  13(a) or Section  15(d) of the  Securities
Exchange Act of 1934 (and, where applicable,  each filing of an employee benefit
plan's annual report pursuant to Section 15(d) of the Securities Exchange Act of
1934) that is incorporated by reference in this registration  statement shall be
deemed to be a new  registration  statement  relating to the securities  offered
herein,  and the offering of such  securities at that time shall be deemed to be
the initial bona fide offering thereof.

     (c)  Undertaking in respect of indemnification:

Insofar as indemnification  for liabilities  arising under the Securities Act of
1933 may be permitted to  directors,  officers  and  controlling  persons of the
Registrant pursuant to the


<PAGE>



foregoing provisions,  or otherwise, the Registrant has been advised that in the
opinion of the  Securities  and  Exchange  Commission  such  indemnification  is
against public policy as expressed in the Act and is, therefore,  unenforceable.
In the event that a claim for  indemnification  against such liabilities  (other
than the payment by the  Registrant of expenses  incurred or paid by a director,
officer or controlling person of the Registrant in the successful defense of any
action, suit or proceeding) is asserted by such director, officer or controlling
person in connection with the securities being registered,  the Registrant will,
unless in the opinion of its counsel the matter has been settled by  controlling
precedent,  submit to a court of appropriate  jurisdiction  the question whether
such  indemnification by it is against public policy as expressed in the Act and
will be governed by the final adjudication of such issue.



<PAGE>


                                   SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933, as amended, the
Registrant certifies that it has reasonable grounds to believe that it meets all
of the  requirements  for  filing  on Form  S-3,  reasonably  believes  that the
security rating requirement referred to in Transaction Requirement B.2 or B.5 of
Form S-3 will be met by the time of sale of the  securities  registered  hereby,
and has duly caused this  Registration  Statement  to be signed on its behalf by
the undersigned,  thereunto duly  authorized,  in the City of New York, State of
New York, on May 23, 2000.

                                        CREDIT SUISSE FIRST BOSTON
                                        MORTGAGE SECURITIES CORP.


                                        By: /s/ Patrick D.Coleman
                                            ---------------------------
                                            Patrick D. Coleman
                                            President

Pursuant to the  requirements of the Securities Act of 1933,  this  Registration
Statement has been signed by the following  persons in the capacities and on the
date indicated:

           Signature              Title                            Date
           ---------              -----                            ----

 /s/ Patrick D. Coleman           Director and President          May 23, 2000
- - - - - - - - ---------------------------       (Principal Executive
PATRICK D. COLEMAN                Officer)


 /s/ Scott J. Ulm                 Director and Chairman           May 23, 2000
- - - - - - - - ---------------------------       of the Board
SCOTT J. ULM


 /s/ William Pitofsky             Director                        May 23, 2000
- - - - - - - - ---------------------------       and Vice President
WILLIAM PITOFSKY


 /s/ Carlos Onis                  Director                        May 23, 2000
- - - - - - - - ---------------------------
CARLOS ONIS


 /s/ Zev Kindler                  Treasurer                       May 23, 2000
- - - - - - - - --------------------------        (Principal Financial Officer)
ZEV KINDLER


 /s/ Thomas Zingalli              Vice President                  May 23, 2000
- - - - - - - - ---------------------------       and Controller
THOMAS ZINGALLI                   (Principal Accounting Officer)





                                                                     Exhibit 1.1



              CREDIT SUISSE FIRST BOSTON MORTGAGE SECURITIES CORP.
                                    Depositor

                   [_________________________] Mortgage-Backed
                   Pass-Through Certificates, Series 200_-___


                               [__________, 200_]


                                     FORM OF
                             UNDERWRITING AGREEMENT
                             ----------------------

Credit Suisse First Boston Corporation
Eleven Madison Avenue
New York, New York 10010

Ladies and Gentlemen:

     1.  Introduction.  Credit Suisse First Boston Mortgage  Securities Corp., a
Delaware corporation (the "Depositor"), proposes to form one or more real estate
mortgage investment  conduits (each, a "Trust"),  which will issue, from time to
time,  securities  entitled  [_________________]   Mortgage-Backed  Pass-Through
Certificates,  Series 200_-___ (the "Certificates") in one or more series (each,
a "Series").  Each Certificate will evidence a fractional,  undivided percentage
interest  or  beneficial  interest  in a Trust.  The  property of each Trust may
consist  primarily  of pools (the  "Mortgage  Loan  Pools") of loans  secured by
mortgages on residential  properties (the "Mortgage  Loans") and certain related
property to be conveyed to the Trust by the Depositor  (the "Trust  Fund").  The
Mortgage Loans may be sold to the Depositor pursuant to a Mortgage Loan Purchase
Agreement,  dated as set forth in the applicable Terms Agreement (as hereinafter
defined)  (each, a "Sale and Purchase  Agreement"),  between the  Depositor,  as
purchaser,  and a third party seller (the "Seller").  The  Certificates  will be
issued pursuant to a Pooling and Servicing Agreement to be dated as set forth in
the  applicable  Terms  Agreement  (the "Pooling and Servicing  Agreement"  and,
together with this  Agreement and the related Sale and Purchase  Agreement,  the
"Agreements"),  among the Depositor,  a servicer (the "Servicer")  named in such
Terms Agreement and a trustee (the "Trustee") named in such Terms Agreement.

     The Certificates are more fully described in the Registration Statement (as
such term is defined in Section 2(a)), which the Depositor has furnished to you.
Each Series of Certificates  and any classes of  Certificates  (each, a "Class")
within  such  Series may vary,  among  other  things,  as to number and types of
Classes,  aggregate  principal  balance or notional  amount or aggregate  stated
principal  balance,  the  pass-through  rate with  respect  to each  Class,  the
percentage  interest,  if any,  evidenced by each Class in payments of principal
and interest on, or with respect to, the Mortgage  Loans included in the related
Trust Fund, the stated principal

<PAGE>



balance and interest rate, if any, priority of payment among Classes, the method
of credit  enhancement  with respect to the Mortgage Loans in the Trust Fund for
such  Series,  the  Classes  of  Certificates  of such  Series  subject  to this
Agreement,  and  any  other  variable  terms  contemplated  by the  Pooling  and
Servicing  Agreement and in the Certificates of such Series.  The Depositor will
elect to treat the  related  Trust  Fund as one or more  "real  estate  mortgage
investment  conduits"  (each, a "REMIC") under the Internal Revenue Code of 1986
(the "Code").

     Each  offering of  Certificates  will be made through you,  through you and
other  underwriters  from whom you are  acting as  representative  or through an
underwriting syndicate managed by you. Whenever the Depositor determines to form
a Trust and to make such an  offering  of  Certificates,  it will  enter into an
agreement (the "Terms  Agreement")  providing for the sale of such  Certificates
to, and the purchase and offering  thereof by, (i) you,  (ii) you and such other
underwriters  who  execute  the  Terms  Agreement  and agree  thereby  to become
obligated to purchase  Certificates  from the  Depositor,  or (iii) you and such
other underwriters, if any, selected by you as have authorized you to enter into
such Terms  Agreement on their behalf (in each case, the  "Underwriters").  Such
Terms Agreement shall specify the fractional  undivided  interest,  principal or
notional amount, or stated principal balance,  of each Class of the Certificates
subject  to this  Agreement,  the  price at which  such  Certificates  are to be
purchased  by the  Underwriters  from the  Depositor,  the  aggregate  amount of
Certificates to be purchased by each Underwriter and any other  Underwriter that
is a party to such Terms  Agreement and the initial public offering price or the
method  by which  the price at which  such  Certificates  are to be sold will be
determined.  The Terms  Agreement,  which shall be  substantially in the form of
Exhibit A hereto, which may take the form of an exchange of any standard form of
written  telecommunication  between  you and the  Depositor.  Each  offering  of
Certificates  will  be  governed  by  this  Agreement,  as  supplemented  by the
applicable  Terms  Agreement,  and this Agreement and such Terms Agreement shall
inure to the benefit of and be binding upon the related Underwriters.  Except as
otherwise  required by the context,  all references herein to a Terms Agreement,
Delivery Date,  Pooling and Servicing  Agreement and Underwriters shall refer to
the  Terms  Agreement,  Delivery  Date,  Pooling  and  Servicing  Agreement  and
Underwriter  or  Underwriters,  as the  case  may be,  relating  to the  related
offering of Certificates.

     2.   Representations  and  Warranties  of  the  Depositor.   The  Depositor
represents and warrants to the  Underwriters as of the date hereof and as of the
date of the applicable Terms Agreement, as follows:

          (a) A registration statement on Form S-3 (No. 333-______), including a
     prospectus  and such  amendments  thereto as may have been  required to the
     date hereof,  relating to the  Certificates and the offering of each Series
     thereof from time to time in accordance  with Rule 415 under the Securities
     Act of 1933, as amended (the "Act"), has been filed with the Securities and
     Exchange Commission (the "Commission") and such registration  statement, as
     amended, has become effective.  For purposes of this Agreement,  "Effective
     Time" means the date and time as of which such registration  statement,  or
     the most recent  post-effective  amendment  thereto (if any) filed prior to
     the execution and delivery of this Agreement, was declared effective by the
     Commission and "Effective  Date" means the date of the Effective Time. Such
     registration   statement,  as  amended,  and  the  prospectus  and  related
     prospectus  supplement  that the  Depositor  has filed with the  Commission
     pursuant to Rule 424(b)  relating  to the sale of the  Certificates



                                       2
<PAGE>

     of the applicable  Series offered thereby  constituting a part thereof,  as
     from time to time amended or supplemented  (including any prospectus  filed
     with the Commission pursuant to Rule 424(b) of the rules and regulations of
     the Commission  promulgated  under the Act (the "Rules and  Regulations")),
     including all documents incorporated therein by reference, are respectively
     referred  to as the  "Registration  Statement",  the  "Prospectus"  and the
     "Prospectus  Supplement";  provided,  however,  that  a  supplement  to the
     Prospectus  prepared  pursuant  to  Section  5(a)  shall be  deemed to have
     supplemented the Prospectus only with respect to the offering of the Series
     of  Certificates  to  which  it  relates.  The  conditions  to the use of a
     registration  statement  on Form S-3  under  the Act,  as set  forth in the
     General  Instructions to Form S-3, and the conditions of Rule 415 under the
     Act, have been satisfied with respect to the Registration Statement.

          (b)  The  Registration  Statement,  on the  Effective  Date,  and  the
     Prospectus, as of the date of the related Prospectus Supplement,  conformed
     in all material  respects to the  requirements of the Act and the Rules and
     Regulations, and did not include any untrue statement of a material fact or
     omit to state any material fact required to be stated  therein or necessary
     to make the  statements  therein  not  misleading,  and on the date of this
     Agreement,  at the time of the filing of the  Prospectus  pursuant  to Rule
     424(b) and at the  Delivery  Date (as such terms as defined in Section  3),
     the  Prospectus  conforms and will conform in all material  respects to the
     requirements of the Act and the Rules and Regulations, and does not include
     and will not include,  any untrue statement of a material fact and does not
     omit and will not omit to state any  material  fact  necessary  in order to
     make the statements  therein, in the light of the circumstances under which
     they  were  made,  not   misleading.   The  Prospectus   delivered  to  the
     Underwriters  for use in connection with the related offering was identical
     to the electronically  transmitted copies thereof filed with the Commission
     pursuant to its Electronic Data Gathering,  Analysis and Retrieval  system,
     except to the extent  permitted  by  Regulation  S-T.  The two  immediately
     preceding  sentences do not apply to statements or omissions from either of
     such  documents  based upon written  information  (including  Computational
     Materials  (as such term is  defined  in  Section  8(a))  furnished  to the
     Depositor by any Underwriter specifically for use therein.

          (c) The Depositor has been duly organized and is validly existing as a
     corporation in good standing under the laws of the State of Delaware,  with
     full  corporate  power and  authority  to own its  assets and  conduct  its
     business as described  in the  Prospectus,  is duly  qualified as a foreign
     corporation in good standing in all jurisdictions in which the ownership or
     lease  of  its  property  or the  conduct  of its  business  requires  such
     qualification, except where the failure to be so qualified would not have a
     material adverse effect on the Depositor, and is conducting its business so
     as to  comply  in all  material  respects  with  the  applicable  statutes,
     ordinances,  rules  and  regulations  of the  jurisdictions  in which it is
     conducting business.

          (d) The Pooling and Servicing Agreement and the Certificates  conform,
     or  will  conform  as of the  Delivery  Date,  to the  description  thereof
     contained  in the  Registration  Statement  and  the  Prospectus;  and  the
     Certificates,  on the date of the Terms Agreement,  will have been duly and
     validly  authorized  and,  when  such  Certificates  are duly  and  validly
     executed by the Depositor or the Trustee, authenticated




                                       3
<PAGE>

     by the Trustee and delivered in accordance  with such Pooling and Servicing
     Agreement and delivered  and paid for as provided  herein,  will be validly
     issued and outstanding  and entitled to the benefits and security  afforded
     by the Pooling and Servicing Agreement.

          (e) The execution and delivery by the Depositor of this Agreement, the
     Terms Agreement, the Pooling and Servicing Agreement, the Sale and Purchase
     Agreement  and the  Certificates  are  within  the  corporate  power of the
     Depositor  and  have  been,  or will  have  been,  duly  authorized  by all
     necessary  corporate  action on the part of the Depositor;  and neither the
     execution  and  delivery  by the  Depositor  of such  instruments,  nor the
     consummation  by  the  Depositor  of the  transactions  herein  or  therein
     contemplated,  nor the  compliance  by the  Depositor  with the  provisions
     hereof or  thereof,  will (i)  conflict  with or result in a breach  of, or
     constitute a default  under,  any of the  provisions of the  certificate of
     incorporation  or by-laws of the  Depositor,  (ii) conflict with any of the
     provisions of any law, governmental rule, regulation,  judgment,  decree or
     order binding on the Depositor or its  properties,  (iii) conflict with any
     of the provisions of any indenture,  mortgage, contract or other instrument
     to which the  Depositor is a party or by which it is bound,  or (iv) result
     in the creation or imposition of any lien,  charge or encumbrance  upon any
     of its  property  pursuant  to the terms of any such  indenture,  mortgage,
     contract or other instrument.

          (f) At the date  thereof,  the Pooling and  Servicing  Agreement  will
     constitute  a  legal,  valid  and  binding  obligation  of  the  Depositor,
     enforceable against the Depositor in accordance with its terms, subject, as
     to  enforcement  of remedies,  to  applicable  bankruptcy,  reorganization,
     insolvency,  moratorium and other similar laws affecting  creditors' rights
     generally from time to time in effect, and to general principles of equity.

          (g) All approvals,  authorizations,  consents, orders or other actions
     of  any  person,  corporation  or  other  organization,  or of  any  court,
     governmental  agency or body or official  (except with respect to the state
     securities  or  Blue  Sky  laws  of  various  jurisdictions),  required  in
     connection  with the valid and proper  authorization,  issuance and sale of
     the  Certificates  pursuant to this Agreement,  the Terms Agreement and the
     Pooling and Servicing  Agreement,  has been or will be taken or obtained on
     or prior to the applicable Delivery Date.

          (h) At the  applicable  Delivery  Date,  each  of the  Mortgage  Loans
     included in the Trust Fund will meet the criteria for  selection  described
     in the Prospectus.

          (i) Certificates subject to this Agreement and offered by means of the
     Registration  Statement  will,  when  issued  pursuant  to the  Pooling and
     Servicing  Agreement,  be "mortgage  related  securities",  as such term is
     defined in Section  3(a)(41) of the  Securities  Exchange  Act of 1934,  as
     amended (the "Exchange Act"), if, and for so long as, such Certificates are
     rated in one of the two highest rating categories  assigned by at least one
     nationally recognized statistical rating organization.

          (j) At the date of its execution  and delivery,  the Sale and Purchase
     Agreement  constituted a legal, valid and binding agreement,  and as of the
     Delivery Date



                                       4
<PAGE>

     will be enforceable by the Trustee, in accordance with its terms,  subject,
     as to enforcement  of remedies,  to applicable  bankruptcy,  reorganization
     insolvency or other similar laws affecting creditors' rights generally from
     time to time in effect, and to general principles of equity.

          (k) The characteristics of the Trust Fund will not subject the related
     Trust to registration as an investment company under the Investment Company
     Act of 1940, as amended (the "Investment Company Act").

     3. Purchase, Sale and Delivery of Certificates. Delivery of and payment for
the  Certificates to which this Agreement  applies will be made at the office of
[Credit Suisse First Boston  Corporation,  Eleven Madison Avenue,  New York, New
York 10010] or such other place as  specified  in the Terms  Agreement,  at such
time as shall  be  specified  in the  Terms  Agreement,  or at such  other  time
thereafter  as set forth in the  Terms  Agreement,  or as you and the  Depositor
shall agree upon, each such time being herein referred to as a "Delivery  Date".
Delivery of such Certificates shall be made by the Depositor to the Underwriters
against  payment  of  the  purchase  price  specified  in the  applicable  Terms
Agreement  in same day  funds  wired to such  bank as may be  designated  by the
Depositor,  or by such  other  manner of  payment  as may be agreed  upon by the
Depositor and you. Except as otherwise  provided in the related Terms Agreement,
each Class of Certificates of a Series sold to the Underwriters pursuant to such
Terms  Agreement  will be  represented  initially  by one or  more  certificates
registered  in the  name of Cede & Co.,  the  nominee  of The  Depository  Trust
Company ("DTC") (the "DTC Certificates"). The interests of the beneficial owners
of the DTC  Certificates  will be  represented by book entries on the records of
DTC and  participating  members  thereof.  Definitive  certificates  for the DTC
Certificates  will  be made  available  only  under  the  limited  circumstances
specified in the Pooling and Servicing  Agreement.  Except as otherwise provided
in the related Terms Agreement,  each Class of Certificates of a Series not sold
to the  Underwriters  pursuant to such Terms  Agreement  will be in  definitive,
fully registered form, in such denominations and registered in such names as the
Underwriter shall request, and will be made available at least 24 hours prior to
the applicable  Closing Date, for checking and packaging at the offices of [] in
such amounts as determined pursuant to the Terms Agreement.

     Except as otherwise  provided in the related Terms  Agreement,  pursuant to
Rule 15c6-1(d) under the Exchange Act, the Depositor and the  Underwriters  have
agreed that the Delivery Date will not be less than five business days following
the date hereof.

     4. Offering by Underwriters. It is understood that the Underwriters propose
to offer the  Certificates  subject to this  Agreement for sale to the public as
set forth in the Prospectus.

     5. Covenants of the Depositor.  The Depositor covenants and agrees with the
Underwriters participating in the applicable offering of the Certificates that:

          (a) Immediately following the execution of the Terms Agreement,  or at
     such other time as the Depositor and the Underwriter  shall mutually agree,
     the Depositor will prepare a supplement to the Prospectus setting forth the
     amount of Certificates  covered thereby and the terms thereof not otherwise
     specified in the



                                       5
<PAGE>


     Prospectus, the price at which such Certificates are to be purchased by the
     Underwriters,  from the Depositor, either the initial public offering price
     or the method by which the price at which such  Certificates are to be sold
     will be determined,  the selling concessions and reallowances,  if any, and
     such  other  information  as you  and the  Depositor  deem  appropriate  in
     connection with the offering of such  Certificates,  but the Depositor will
     not file,  for so long as the  delivery  of a  Prospectus  is  required  in
     connection with the offering or sale of such  Certificates,  any amendments
     to  the   Registration   Statement  as  in  effect  with  respect  to  such
     Certificates, or any amendments or supplements to the Prospectus, unless it
     shall first have delivered copies of such amendments or supplements to you,
     or if you shall have  reasonably  objected  thereto  promptly after receipt
     thereof; the Depositor will, during such period,  immediately advise you or
     your  counsel  (i) when  notice is received  from the  Commission  that any
     post-effective  amendment to the Registration  Statement has become or will
     become  effective  and (ii) of any order or  communications  suspending  or
     preventing, or threatening to suspend or prevent, the offer and sale of the
     Certificates or of any proceedings or examinations that may lead to such an
     order or  communication,  whether by or of the  Commission or any authority
     administering  any  state  securities  or  Blue  Sky  law,  as  soon as the
     Depositor is advised thereof,  and will use its best efforts to prevent the
     issuance  of any  such  order or  communication  and to  obtain  as soon as
     possible its lifting,  if issued.  Subject to the Underwriters'  compliance
     with their  obligations  set forth in Section 8, the  Depositor  shall file
     with  the   Commission  a  current   report  on  Form  8-K   including  any
     Computational  Materials  provided  to it by the  Underwriters  pursuant to
     Section 8 no later than the date that the Prospectus Supplement is filed.

          (b) If, at any time when a Prospectus  relating to the Certificates is
     required to be  delivered  under the Act,  any event  occurs as a result of
     which the  Prospectus  as then amended or  supplemented  would  include any
     untrue  statement  of a  material  fact or omit to  state a  material  fact
     necessary  in order to make the  statements  therein,  in the  light of the
     circumstances  under  which they were  made,  not  misleading,  or if it is
     necessary at any time to amend or supplement  the Prospectus to comply with
     the Act or the Rules and  Regulations,  the Depositor will promptly prepare
     and file with the Commission,  an amendment or supplement that will correct
     such   statement  or  omission  or  an  amendment  that  will  effect  such
     compliance.

          (c) The Depositor will make generally  available to the holders of the
     Certificates (the  "Certificateholders"),  and deliver to you, in each case
     as soon as  practicable,  an  earning  statement  which  will  satisfy  the
     provisions of Section 11(a) of the Act and Rule 158 of the Commission  with
     respect to the  Certificates;  and the Depositor  will cause the Trustee to
     furnish or make  available,  within a reasonable time after the end of each
     calendar year, to each Certificateholder at any time during such year, such
     information  as the  Depositor  deems  necessary  or  desirable  to  assist
     Certificateholders in preparing their federal income tax returns.

          (d) The  Depositor  will  furnish  to you  copies of the  Registration
     Statement  (two of which will be signed and will include all  documents and
     exhibits  thereto or  incorporated  by  reference  therein),  each  related
     preliminary  prospectus,  the Prospectus and all amendments and supplements
     to such documents relating to the



                                       6
<PAGE>


     Certificates, in each case as soon as available, but in no event later than
     five business days after signing the related Terms  Agreement,  and in such
     quantities as you reasonably request.

          (e)  The  Depositor  will  arrange  for  the   qualification   of  the
     Certificates  for  sale and the  determination  of  their  eligibility  for
     investment  under the laws of such  jurisdictions as you designate and will
     continue  such  qualifications  in  effect  so  long  as  required  for the
     distribution  of the  Certificates;  PROVIDED,  HOWEVER,  that  neither the
     Depositor   nor  the  Trust  shall  be  required  to  do  business  in  any
     jurisdiction  where it is now not  qualified  or to take any  action  which
     would  subject  it to  general  or  unlimited  service  of  process  in any
     jurisdiction in which it is now not subject to service of process.

          (f) The  Depositor  will,  while  the  Certificates  of a  Series  are
     outstanding  furnish to you,  and upon  request of each other  Underwriter,
     other  information  with  respect  to the  related  Trust or its  financial
     condition  or results of  operations,  as any  Underwriter  may  reasonably
     request,  including but not limited to information necessary or appropriate
     to the  maintenance  of a  secondary  market  in the  Certificates  of such
     Series.

          (g) The Depositor will pay all expenses incident to the performance of
     its  obligations  under this  Agreement  and the Terms  Agreement  and will
     reimburse  the   Underwriters   for  any  expenses   (including   fees  and
     disbursements  of  its  counsel)   incurred  by  them  in  connection  with
     qualification  of the related Series of Certificates  and  determination of
     their  eligibility for investment  under the laws of such  jurisdictions as
     you may designate and the reproduction of memoranda  relating thereto,  for
     any fees  charged  by  investment  rating  agencies  for the  rating of the
     Certificates  and,  to the  extent  previously  agreed  upon with you,  the
     expenses  incurred  in  distributing  any  preliminary  prospectuses,   the
     Prospectus or any amendments or supplements thereto to the Underwriters.

          (h) During the  period  when a  prospectus  is  required  by law to be
     delivered  in  connection  with the sale of  Certificates  pursuant to this
     Agreement,  the Depositor will file, or cause the Trustee to file on behalf
     of the related Trust,  on a timely and complete  basis,  all documents that
     are required by the related Trust with the Commission  pursuant to Sections
     13, 14 or 15(d) of the Exchange Act.

          (i) [The Depositor will prepare, or cause to be prepared, and file, or
     cause to be filed,  a timely  election to treat each Trust REMIC as a REMIC
     for federal  income tax purposes and will file, or cause to be filed,  such
     tax returns and take such actions,  all on a timely basis,  as are required
     to elect and maintain such status.]

     6.  Conditions to the Obligations of the  Underwriters.  The obligations of
the  Underwriters  to  purchase  and pay for the  Certificates  subject  to this
Agreement will be subject to the accuracy of the  representations and warranties
on the part of the  Depositor  as of the  date  hereof,  the  date of the  Terms
Agreement and the applicable Delivery Date, to the accuracy of the statements of
the Depositor made pursuant to the provisions thereof, to the performance by the



                                       7
<PAGE>



Depositor  in all  material  respects of its  obligations  hereunder  and to the
following additional conditions precedent:

          (a) You shall have  received a letter from the Officer of  Deposition,
     dated the date of the  Prospectus  Supplement  and addressed to you each in
     the forms heretofore agreed to.

          (b) You shall have received a copy of the  Prospectus  for the related
     Series.

          (c) All actions  required  to be taken and all filings  required to be
     made by the Depositor  under the Act prior to the sale of the  Certificates
     shall have been duly taken or made;  and prior to the  applicable  Delivery
     Date,  no stop  order  suspending  the  effectiveness  of the  Registration
     Statement  shall have been issued and no proceedings for that purpose shall
     have  been  instituted,  or to  the  knowledge  of  the  Depositor  or  any
     Underwriter, shall be contemplated by the Commission.

          (d) The Certificates subject to this Agreement and offered by means of
     the  Registration  Statement  shall be rated at the time of issuance as set
     forth in the Terms Agreement.

          (e) you shall have  received an opinion of counsel for the  Depositor,
     dated the applicable Delivery Date, substantially to the effect that:

                    (i) The Depositor is a corporation  duly organized,  validly
               existing  and in good  standing  under  the laws of the  State of
               Delaware,  with full corporate  power and corporate  authority to
               own its assets and operate its  business as is necessary to carry
               out the transactions contemplated by the Agreements,  and is duly
               qualified to do business as a foreign corporation in the State of
               New York.

                    (ii) This  Agreement and the Terms  Agreement have been duly
               authorized, executed and delivered by the Depositor.

                    (iii)  The  execution,   delivery  and  performance  of  the
               Agreements do not conflict with the Certificate of  Incorporation
               or the By-laws of the  Depositor  and, to the  knowledge  of such
               counsel  and based  solely on its  examination  of the  documents
               referred to in such opinion,  (A) do not conflict with or violate
               or  constitute  a  material  breach of, or  constitute  a default
               under, any material written contract,  indenture,  undertaking or
               other agreement or instrument by which the Depositor is now bound
               or to which it is now a party, or result in the imposition of any
               material lien upon any of its material properties, and (B) do not
               conflict  with or violate  any order,  write,  injunction  or the
               decree  of  any  court  or  governmental  authority  against  the
               Depositor or by which any of its properties is bound.

                    (iv) Each of the Sale and Purchase Agreement and the Pooling
               and Servicing  Agreement has been duly  authorized,  executed and
               delivered by the Depositor and,  assuming the due  authorization,
               execution and delivery thereof by



                                       8
<PAGE>

               the other  parties  thereto,  constitutes  the  legal,  valid and
               binding  agreement  of the  Depositor,  enforceable  against  the
               Depositor in  accordance  with its terms,  except as  enforcement
               thereof may be subject to or limited by  bankruptcy,  insolvency,
               moratorium, reorganization, arrangement, fraudulent conveyance or
               other laws relating to or affecting  creditors'  rights generally
               or by general equitable principles.

                    (v)  The  Certificates  have  been  duly  authorized  by the
               Depositor  and, when executed and  authenticated  pursuant to the
               Pooling  and  Servicing  Agreement  and  paid  for and  delivered
               pursuant  to this  Agreement  and the  Terms  Agreement,  will be
               validly  issued  and  outstanding  and  will be  entitled  to the
               benefits afforded by the Pooling and Servicing Agreement.

                    (vi) No  authorization,  consent,  approval of, notice to or
               other  filing with any federal or State of New York  governmental
               authority  is  required  for the  execution  of,  delivery  of or
               performance by the Depositor of any material obligation under the
               Agreements  or the  Certificates  except  (a)  such as have  been
               obtained  under the Act and (b) such as may be required under the
               blue sky laws of any  jurisdiction  in connection  with the offer
               and sale of the Certificates, as to which we express no opinion.

                    (vii) The Pooling and Servicing Agreement is not required to
               be qualified  under the Trust Indenture Act of 1939 and the Trust
               Fund  is not  required  to be  registered  under  the  Investment
               Company Act.

                    (viii) The Registration Statement has become effective under
               the Act,  and, to the  knowledge of such  counsel,  no stop order
               suspending the  effectiveness of the  Registration  Statement has
               been  issued  and no  proceedings  for  that  purpose  have  been
               instituted  or are  pending or  contemplated  under the Act;  the
               Registration Statement and the Prospectus,  and each amendment or
               supplement  thereto,  as of their  respective  effective or issue
               dates  complied  as to  form  in  all  material  respects  to the
               requirements  of the Act  and the  Rules  and  Regulations;  such
               counsel  has no reason to believe  that  either the  Registration
               Statement,  at the  Effective  Time,  or any  such  amendment  or
               supplement,  as of  its  effective  date,  contained  any  untrue
               statement  of a material  fact or  omitted to state any  material
               fact  required  to be stated  therein  or  necessary  to make the
               statements therein not misleading, or that the Prospectus, at the
               date of this Agreement,  or any such amendment or supplement,  as
               of its  respective  date,  or at the Delivery  Date,  included or
               includes  an untrue  statement  of a material  fact or omitted or
               omits to state a  material  fact  necessary  in order to make the
               statements therein, in the light of the circumstances under which
               they were made, not  misleading;  it being  understood  that such
               counsel need express no opinion as to the financial statements or
               other financial or statistical data contained in the Registration
               Statement or the Prospectus or with respect to the description in
               the  Prospectus  Supplement  under the  headings  "The Seller and
               Servicer,"   "Description  of  the  Mortgage  Pool--General"  and
               "--Underwriting Standards".


                                       9
<PAGE>


                    (ix) The  statements  in the  Prospectus  under the  caption
               "Description  of   Certificates",   insofar  as  such  statements
               constitute a summary of certain  terms of the  Certificates,  the
               Sale  and  Purchase  Agreement  and  the  Pooling  and  Servicing
               Agreement,  while they do not  purport to discuss  all aspects of
               such  documents,  constitute a fair summary of such  documents in
               all material  respects;  the statements in the Prospectus and the
               Prospectus  Supplement,  as the case may be,  under the  captions
               "Certain  Legal  Aspects of the  Mortgage  Loans and  Contracts",
               "ERISA  Considerations"  and "Federal Income Tax Consequences" to
               the  extent  that  they  constitute   matters  of  law  or  legal
               conclusions with respect thereto,  have been prepared or reviewed
               by such counsel and are correct in all material respects.

                    (x)  Assuming  that,  and  for so long  as,  each  Class  of
               Certificates  offered pursuant to the Registration  Statement are
               rated by a nationally recognized  statistical rating organization
               in one of its two highest rating  categories,  each such Class of
               Certificates constitutes "mortgage related securities" within the
               meaning of Section 3(a)(41) of the Exchange Act.

                    (xi) [Assuming compliance with all provisions of the Pooling
               and Servicing Agreement,  under existing law, (a) the Trust REMIC
               I and Trust  REMIC II (as such terms are  defined in the  Pooling
               and Servicing  Agreement)  will each be treated as a "real estate
               mortgage  investment  conduit"  (a "REMIC") as defined by Section
               860D of the Internal Revenue Code of 1986 (the "Code"),  (b) each
               of the [Class A],  [Class M] and [Class B]  Certificates  will be
               treated as (or will be comprised of) "regular interests" in Trust
               REMIC II, as the term "regular  interest" is defined in the Code,
               (c) the  [Class  R-1]  Certificates  will be  treated as the sole
               class  of  "residual  interests"  in  Trust  REMIC I, as the term
               "residual  interest"  is defined in the Code,  and (d) the [Class
               R-2]  Certificates will be treated as the sole class of "residual
               interests" in Trust REMIC II, as the term "residual  interest" is
               defined in the Code. However, continuation of the status of Trust
               REMIC I and Trust REMIC II as REMICs may entail  compliance  with
               statutory  changes  in the future  and with  regulations  not yet
               issued.]

          (f) You shall have  received  an  opinion  of  counsel to the  Seller,
     addressed  to the  Underwriters  and the  Depositor,  dated the  applicable
     Delivery  Date,  substantially  to the effect  that the  statements  in the
     Prospectus  Supplement  prepared by the Depositor  pursuant to Section 5(a)
     under the  captions  ["___________,"]  ["________"],  ["___________"],  and
     ["___________"]  do not contain any untrue  statement of a material fact or
     omit to state a material fact required to be stated therein or necessary in
     order to make the  statements  therein,  in the light of the  circumstances
     under which they were made, not misleading (it being  understood  that such
     counsel  need not render any  opinion  with  respect  to any  financial  or
     statistical information contained therein).

          (g) You shall have  received  an  opinion  of  counsel to the  Seller,
     addressed  to the  Underwriters  and the  Depositor,  dated the  applicable
     Delivery Date, and in a form agreed to on or prior to the date of the Terms
     Agreement regarding (i) certain



                                       10
<PAGE>

     FDIA bankruptcy insolvency or FDIA matters, (ii) corporate matters relating
     to the seller, (iii)  enforceability  matters relating to the Agreements as
     to which the seller is a party,  and (iv) the  perfection  of the  security
     interest of the Trustee in the Mortgage Notes.

          (h) You shall have  received  an  opinion  of counsel to the  Trustee,
     dated the Delivery  Date, and in the form agreed to on or prior to the date
     of the Terms  Agreement  regarding  (i)  certain  state tax  matters,  (ii)
     corporate matters relating to the Trustee and (iii) enforceability  matters
     relating to the Agreements as to which the Trustee is a party.

          (i) You shall have received from [__________], special counsel for the
     Underwriters,  such opinion or  opinions,  dated the  Delivery  Date,  with
     respect to the existence of the Depositor,  the Registration Statement, the
     Prospectus and other related matters as the Underwriters  may require,  and
     the Depositor  shall have  furnished to such counsel such documents as they
     request for the purpose of enabling them to pass upon such matters.

          (j) You shall have received a certificate  or  certificates  signed by
     such of the principal  executive,  financial and accounting officers of the
     Depositor as you may request,  dated the applicable Delivery Date, in which
     such  officers,   to  the  best  of  their   knowledge   after   reasonable
     investigation,  shall state that (i) the  representations and warranties of
     the Depositor in this  Agreement  are true and correct;  (ii) the Depositor
     has complied with all  agreements  and satisfied all conditions on its part
     to be performed or satisfied at or prior to the Closing Date; (iii) no stop
     order suspending the  effectiveness of the Registration  Statement has been
     issued and no  proceedings  for that  purpose have been  instituted  or are
     contemplated;   (iv)  subsequent  to  the  respective  dates  as  of  which
     information is given in the  Prospectus,  and except as otherwise set forth
     in or  contemplated  by the  Prospectus,  there  has not been any  material
     adverse change in the general affairs, capitalization,  financial condition
     or results of operations of the Depositor;  (v) except as otherwise  stated
     in the  Prospectus,  there are no material  actions,  suits or  proceedings
     pending before any court or governmental  agency,  authority or body or, to
     their  knowledge,  threatened,  affecting the Depositor or the transactions
     contemplated  by this  Agreement;  and (vi)  attached  thereto are true and
     correct  copies of a letter from the rating  agency or agencies  rating the
     Certificates  subject to this Agreement  confirming  that the  Certificates
     have been rated in one of the four highest rating categories established by
     such agency or agencies as set forth in the Terms Agreement and such rating
     has not been lowered since the date of such letter.

          (k)  If  applicable,   you  shall  have  received  letters  dated  the
     applicable  Delivery Date from counsel rendering opinions to any nationally
     recognized  statistical rating organization rating the applicable Series of
     Certificates,  to the effect  that you may rely upon their  opinion to such
     rating organization, as if such opinion were rendered to you.

          (l) You shall have  received a certificate  of the Trustee,  signed by
     one or more duly authorized  officers of the Trustee,  dated the applicable
     Delivery Date, as to



                                       11
<PAGE>


     the due  acceptance of the Pooling and  Servicing  Agreement by the Trustee
     and the due  authorization  and delivery of the Certificates of such Series
     by the Trustee thereunder.

          (m)  To  the  extent,  if  any,  that  the  ratings  provided  to  the
     Certificates     by    either     [__________________]     ("______")    or
     [_________________]   ("____")  is  conditional   upon  the  furnishing  of
     documents  or the  taking  of any other  actions  by the  Depositor  or the
     Servicer,  the Depositor or the Servicer, as the case may be, shall furnish
     such documents and take any such other actions.

          (n)  You  shall  have  received  letters  from  [______]  and  [_____]
     confirming the ratings set forth in the related Terms Agreement.

          The Depositor will furnish you with such conformed copies of such
opinions, certificates, letters and documents as you reasonably request.

          7. Indemnification

     (a) The Depositor  will  indemnify and hold harmless each  Underwriter  and
     each person,  if any, who controls such  Underwriter  within the meaning of
     the Act,  against  any losses,  claims,  damages or  liabilities,  joint or
     several,  to which such Underwriter or such  controlling  person may become
     subject,  under  the Act or  otherwise,  insofar  as such  losses,  claims,
     damages or liabilities (or actions in respect  thereof) arise out of or are
     based upon any untrue statement or alleged untrue statement of any material
     fact  contained  in the  Registration  Statement or the  Prospectus  or any
     amendment  or  supplement  thereto,  or arise out of or are based  upon the
     omission or alleged  omission to state  therein a material fact required to
     be  stated  therein  or  necessary  to  make  the  statements  therein  not
     misleading;  and will reimburse each  Underwriter and each such controlling
     person  for  any  legal  or  other  expenses  reasonably  incurred  by such
     Underwriter   and  each  such   controlling   person  in  connection   with
     investigating  or  defending  any such loss,  claim,  damage,  liability or
     action;  provided,  however,  that the Depositor  will not be liable in any
     such case to the extent  that any such  loss,  claim,  damage or  liability
     arises out of or is based upon any such untrue  statement or alleged untrue
     statement in or omission or alleged  omission made in any of such documents
     in reliance upon and in conformity  with written  information  furnished to
     the  Depositor by the relevant  Underwriter  specifically  for use therein.
     This  indemnity  agreement  will be in addition to any liability  which the
     Depositor may otherwise have.

          (b) Each  Underwriter  will indemnify and hold harmless the Depositor,
     each of its  directors,  each of its officers  who signed the  Registration
     Statement and each person,  if any, who controls the  Depositor  within the
     meaning of the Act against any losses,  claims,  damages or  liabilities to
     which the Depositor or any such director, officer or controlling person may
     become subject, under the Act or otherwise, insofar as such losses, claims,
     damages or liabilities (or actions in respect  thereof) arise out of or are
     based upon any untrue statement or alleged untrue statement of any material
     fact  contained  in the  Registration  Statement or the  Prospectus  or any
     amendment  or  supplement  thereto,  or arise out of or are based  upon the
     omission or the alleged  omission to state therein a material fact required
     to be stated therein or necessary to make the



                                       12
<PAGE>


     statements therein not misleading,  in each case to the extent, but only to
     the extent,  that such untrue  statement  or alleged  untrue  statement  or
     omission or alleged  omission was made in reliance  upon and in  conformity
     with written  information  furnished to the  Depositor by such  Underwriter
     specifically  for use  therein,  and  will  reimburse  any  legal  or other
     expenses reasonably incurred by the Depositor or any such director, officer
     or controlling  person in connection  with  investigating  or defending any
     such loss, claim,  damage,  liability or action.  This indemnity  agreement
     will be in addition to any liability  that such  Underwriter  may otherwise
     have.

          (c) Promptly after receipt by an indemnified  party under this Section
     of notice of the commencement of any action,  such indemnified  party will,
     if a claim in respect thereof is to be made against the indemnifying  party
     under this  Section,  notify  the  indemnifying  party of the  commencement
     thereof;  but the  omission  so to notify the  indemnifying  party will not
     relieve it from any liability  which it may have to any  indemnified  party
     otherwise in this Section.  In case any such action is brought  against any
     indemnified   party,  and  it  notifies  the  indemnifying   party  of  the
     commencement  thereof,  the indemnifying party to such indemnified party of
     its election so to assume the defense thereof,  the indemnifying party will
     be entitled to  participate  therein,  and, to the extent that it may wish,
     jointly with any other indemnifying party similarly notified, to assume the
     defense thereof,  with counsel  satisfactory to such indemnified party (who
     shall not, except with the consent of the indemnified  party, be counsel to
     the indemnifying  party) and, after notice from the  indemnifying  party to
     such  indemnified  party of its election so to assume the defense  thereof,
     the indemnifying  party will not be liable to such indemnified  party under
     this Section for any legal or other expenses  subsequently incurred by such
     indemnified  party  in  connection  with the  defense  thereof  other  than
     reasonable costs of investigation.

          (d) If the indemnification provided for in this Section is unavailable
     or insufficient to hold harmless an indemnified  party under subsection (a)
     or (b) above, then each  indemnifying  party shall contribute to the amount
     paid or  payable  by such  indemnified  party  as a result  of the  losses,
     claims,  damages or liabilities  referred to in subsection (a) or (b) above
     (i) in such  proportion as is appropriate to reflect the relative  benefits
     received by the Depositor on the one hand and the Underwriters on the other
     from the  offering of the Offered  Certificates  or (ii) if the  allocation
     provided by clause (i) above is not  permitted  by  applicable  law in such
     proportion  as is  appropriate  to reflect not only the  relative  benefits
     referred  to in  clause  (i)  above  but  also  the  relative  fault of the
     Depositor on the one hand and the  Underwriters  on the other in connection
     with the  statements or omissions  which  resulted in such losses,  claims,
     damages  or   liabilities   as  well  as  any  other   relevant   equitable
     considerations.  The relative benefits received by the Depositor on the one
     hand and the  Underwriters  on the other  shall be deemed to be in the same
     proportion  as the total net proceeds from the offering  (before  deducting
     expenses)  received  by  the  Depositor  bear  to  the  total  underwriting
     discounts and commissions received by the Underwriters.  The relative fault
     shall be determined by reference to, among other things, whether the untrue
     or alleged  untrue  statement of a material fact or the omission or alleged
     omission to state a material  fact relates to  information  supplied by the
     Depositor or the Underwriters and the parties' relative intent,  knowledge,
     access to  information  and  opportunity  to correct or prevent such untrue
     statement or omission. The



                                       13
<PAGE>

     amount  paid by an  indemnified  party as a result of the  losses,  claims,
     damages or liabilities referred to in the first sentence of this subsection
     (d) shall be  deemed to  include  any  legal or other  expenses  reasonably
     incurred by such indemnified in connection with  investigating or defending
     any  action  or  claim  which  is  the  subject  to  this  subsection  (d).
     Notwithstanding the provisions of this subsection (d), no Underwriter shall
     be required to  contribute  any amount in excess of the amount by which the
     total price at which the Certificates underwritten by it and distributed to
     the public  were  offered to the public  exceeds  the amount of any damages
     which such Underwriter has otherwise been required to pay by reason of such
     untrue or alleged  untrue  statement  or omission or alleged  omission.  No
     person  guilty of  fraudulent  misrepresentation  (within  the  meaning  of
     Section 11(f) of the Act) shall be entitled to contribution from any person
     who was not guilty of such fraudulent misrepresentation.  The Underwriters'
     obligations in this  subsection (d) to contribute are several in proportion
     to their respective underwriting obligations and not joint.

     8. Computational  Materials.  (a) Each Underwriter agrees to provide to the
Depositor  no less  than two  business  days  prior  to the  date on  which  the
Prospectus  is proposed to be filed  pursuant to Rule 424(b)  under the Act, for
the purpose of permitting  the  Depositor to comply with the filing  requirement
set forth in Section 5(a), all information (in such written or electronic format
as required by the Depositor) with respect to the Certificates which constitutes
"Computational  Materials",  as defined in the  Commission's  No-Action  Letter,
dated May 20,  1994,  addressed to Kidder,  Peabody  Acceptance  Corporation  I,
Kidder,  Peabody & Co. Incorporated and Kidder Structured Asset Corporation,  as
made applicable to other issuers and  underwriters by the Commission in response
to the  request  of  the  Public  Securities  Association  dated  May  24,  1994
(collectively,  the "Kidder/PSA  Letter"), as well as the PSA Letter referred to
below,  and that is required to be filed as described in the Kidder/PSA  Letter.
Each  Underwriter  shall  comply with all  applicable  laws and  regulations  in
connection  with the use of ABS Term Sheets,  including the No-Action  Letter of
February 17, 1995 issued by the Commission to the Public Securities  Association
(the "PSA Letter" and,  together  with the  Kidder/PSA  Letter,  the  "No-Action
Letters").

          (b) The Underwriters shall provide to the Depositor, together with the
     information  required to be provided to the  Depositor  pursuant to Section
     8(a) or 8(c)(iii) hereof, a letter, in form and substance acceptable to the
     Depositor,  of independent  certified public accountants  acceptable to the
     Depositor,  stating  in  effect  that  such  independent  certified  public
     accountants have performed certain specified procedures,  all of which have
     been agreed to by the Depositor,  and that they have verified or confirmed,
     as appropriate,  the financial,  numerical or statistical information to be
     filed by the Depositor as part of the Computational  Materials and ABS Term
     Sheets and have found such  information to be accurate  without  exception.
     Such letter will be obtained at the sole expense of the Underwriters.

          (c) (i) The  relevant  Underwriter  represents  and  warrants  to, and
     covenants  with,  the  Depositor  that  all  information  provided  to  the
     Depositor  pursuant to this Section,  as of the date such information is so
     provided and as of the date such information is filed by the Depositor with
     the Commission will not include any untrue statement of a material fact and
     will not omit to state any material facts required to be





                                       14
<PAGE>

     stated  therein  or  necessary  in order to make the  statements  contained
     therein,  in the light of the circumstances under which they were made, not
     misleading.

               (ii)  The  relevant   Underwriter   further  covenants  with  the
          Depositor  that if any  Computational  Materials  or ABS  Term  Sheets
          required to be provided to the Depositor  pursuant to Section 8(a) are
          determined   to  contain  any   information   that  is  inaccurate  or
          misleading,   the   relevant   Underwriter   (whether   or  not   such
          Computational  Materials  or  ABS  Term  Sheets  are  provided  to the
          Depositor  or  filed  by the  Depositor  with  the  Commission)  shall
          promptly  prepare and deliver to the  Depositor  and each  prospective
          investor  which  received such  information,  corrected  Computational
          Materials or ABS Term Sheets, as applicable.  All information provided
          to the Depositor  pursuant to this Section  8(c)(ii) shall be provided
          within the time periods set forth in Section 8(a) hereof.

               (iii) The  Underwriters  represent  and warrant to the  Depositor
          that the  Underwriters  have taken all necessary and required steps to
          ensure  that  no  written   material  of  any  kind  relating  to  the
          Certificates (or any certificates similar to the Certificates) will be
          delivered to potential investors other than Computational Materials or
          ABS Term Sheets required to be filed pursuant to the No-Action Letters
          and that all  Computational  Materials  and ABS  Term  Sheets  will be
          provided to the Depositor,  and to ensure that all such  Computational
          Materials and ABS Term Sheets are accurate and not misleading.

               (iv)  The  Underwriters  covenant  with  the  Depositor  that all
          Computational  Materials and ABS Term Sheets  delivered to prospective
          investors  shall  contain  a  legend  substantially  to the  following
          effect:

                "THIS  INFORMATION  IS FURNISHED TO YOU SOLELY BY [CREDIT SUISSE
                FIRST BOSTON  CORPORATION] AND/OR THE OTHER UNDERWRITERS AND NOT
                BY [CREDIT SUISSE FIRST BOSTON MORTGAGE  SECURITIES  CORP.] (THE
                "DEPOSITOR") OR ANY OF ITS AFFILIATES (OTHER THAN [CREDIT SUISSE
                FIRST BOSTON  CORPORATION]  IN ITS CAPACITY AS AN  UNDERWRITER).
                THE  UNDERWRITERS  ARE NOT ACTING AS AGENTS FOR THE DEPOSITOR OR
                ITS AFFILIATES IN CONNECTION WITH THE PROPOSED TRANSACTION."

               In the case of  Collateral  Term  Sheets,  such legend shall also
          include the following statement:




                                       15
<PAGE>


                     "THE INFORMATION CONTAINED HEREIN WILL BE SUPERSEDED BY THE
                DESCRIPTION  OF THE MORTGAGE  POOL  CONTAINED IN THE  PROSPECTUS
                SUPPLEMENT RELATING TO THE CERTIFICATES AND [EXCEPT WITH RESPECT
                TO  THE   INITIAL   COLLATERAL   TERM  SHEET   PREPARED  BY  THE
                UNDERWRITER]   SUPERSEDES  ALL  INFORMATION   CONTAINED  IN  ANY
                COLLATERAL  TERM SHEETS RELATING TO THE MORTGAGE POOL PREVIOUSLY
                PROVIDED BY [___________________] [NAME OF UNDERWRITER]."

               (d)  The  relevant  Underwriter  agrees  to  indemnify  and  hold
          harmless the Depositor, each of the Depositor's officers and directors
          and each  person who  controls  the  Depositor  within the  meaning of
          either the Act or the Exchange Act against any and all losses, claims,
          damages or  liabilities,  joint or  several,  to which they may become
          subject  under the Act,  the Exchange  Act, or other  Federal or State
          statutory law or  regulation,  at common law or otherwise,  insofar as
          such losses,  claims,  damages or  liabilities  (or actions in respect
          thereof)  (i) are  based  on,  result  from or arise  out of:  (A) the
          relevant  Underwriter's use or delivery to any prospective investor in
          the  Certificates  of any  Computational  Materials;  (B) the relevant
          Underwriter's  failure to comply with Sections  8(a) or 8(c);  (C) the
          filing  by the  Depositor  with  the  Commission  of  any  information
          pursuant to the last sentence of Section 5(a); or (ii) arise out of or
          are based upon any untrue  statement or alleged untrue  statement of a
          material fact contained in any information required to be delivered to
          the Depositor  pursuant to a Section 8(a) or 8(c)(ii) hereof, or arise
          out of or are based upon the  omission  or alleged  omission  to state
          therein a material fact required to be stated  therein or necessary to
          make the statements  therein,  in the light of the circumstances under
          which they were made,  not  misleading,  and agrees to reimburse  each
          such  indemnified  party  for any legal or other  expenses  reasonably
          incurred  by  him,  her  or it in  connection  with  investigating  or
          defending  any such loss,  claim,  damage,  liability  or action.  The
          obligations  of  such  Underwriter  under  this  Section  shall  be in
          addition to any liability which such Underwriter may otherwise have.

               The  procedures  set  forth in  Section  7(c)  and 7(d)  shall be
          equally applicable to this Section.

               (e)   Notwithstanding   any  other  provision  herein,   (a)  the
          Underwriter  shall not be required to be responsible for any amount in
          excess of the amount by which the total re-offering price at which the
          Certificates  underwritten  by it and  distributed  and offered to the
          public  exceeds the amount paid hereunder by the  Underwriter  for the
          Certificates.  For the purposes of this Section 8(e), each person,  if
          any, who controls the Underwriter within the meaning of the Securities
          Act or the Exchange Act shall have the same rights to  contribution as
          the  Underwriter  and each director of the Depositor,  each officer of
          the Depositor who signed the Registration Statement,  and each person,
          if  any,  who  controls  the  Depositor  within  the  meaning  of  the
          Securities  Act or the  Exchange  Act  shall  have the same  rights to
          contribution as the Depositor and (b) the relevant  Underwriter agrees
          to pay all costs and expenses of the Depositor  incurred in connection
          with (i) the filing by the Depositor of any Computational  Material or
          ABS Term Sheets



                                       16
<PAGE>

          with the Commission  and (ii) any action by the Depositor  against the
          relevant  Underwriter  to enforce  any of its rights set forth in this
          Section, including, without limitation, legal fees and expenses.

     9.  Default  of   Underwriters.   If  any   Underwriter   or   Underwriters
participating  in an offering of  Certificates  default in their  obligations to
purchase Certificates  hereunder and under the Terms Agreement and the aggregate
principal  amount of such  Certificates  which such  defaulting  Underwriter  or
Underwriters  agreed, but failed, to purchase does not exceed [10]% of the total
principal amount of the Certificates set forth in such Terms Agreement,  you may
make  arrangements  satisfactory  to the  Depositor  for  the  purchase  of such
Certificates by other persons,  including any of the Underwriters  participating
in such  offering,  but  regardless  of whether such  arrangements  are made the
non-defaulting  Underwriters  shall remain  obligated  severally to purchase the
Certificates  which they  committed  to  purchase in  accordance  with the terms
hereunder and under the Terms  Agreement.  If any Underwriter or Underwriters so
default and the aggregate principal amount of Certificates with respect to which
such default or defaults occur is more than [10]% of the total principal  amount
of  the  Certificates  set  forth  in  such  Terms  Agreement  and  arrangements
satisfactory  to you and the Depositor for the purchase of such  Certificates by
other persons are not made, this Agreement will terminate  without  liability on
the part of any nondefaulting Underwriter,  except as provided in Section 10. As
used in this Agreement,  the term "Underwriter"  includes any person substituted
for an Underwriter under this Section.  Nothing herein will relieve a defaulting
Underwriter from liability for its default.

     10. Termination of the Obligations of the Underwriters.  The obligations of
the  Underwriters  to purchase the  Certificates  on the Delivery  Date shall be
terminable  by the  Underwriters  if (a) at any time on or prior to the Delivery
Date (i) trading in securities  generally on the New York Stock  Exchange  shall
have been suspended or materially  limited, or there shall have been any setting
of minimum  prices for trading on such  exchange,  (ii) a general  moratorium on
commercial  banking  activities  in New York shall have been  declared by either
Federal or New York State  authorities,  (iii)  there  shall have  occurred  any
material outbreak or escalation of hostilities or other calamity or crisis,  the
effect of which on the financial markets of the United States is such as to make
it, in your judgment as  representative  of the  Underwriters,  impracticable to
consummate the transactions  contemplated  herein or is such as would materially
and  adversely  affect  the  marketability  of  or  the  market  price  for  the
Certificates  or (iv) any  change or any  development  involving  a  prospective
change,  materially and adversely  affecting (A) the Trust Fund taken as a whole
or (B) the  business or  properties  of the  Depositor  occurs,  which,  in your
reasonable judgment as representative of the Underwriters, in the case of either
clause (A) or (B), materially impairs the investment quality of the Certificates
or (b) any representation or warranty of another party shall be incorrect in any
material respect.

     11. Survival of Certain  Representations  and  Obligations.  The respective
indemnities, agreements, representations, warranties and other statements by the
Depositor or its officers and of the  Underwriters set forth in or made pursuant
to this  Agreement  will  remain in full  force and  effect,  regardless  of any
investigation,  or statement as to the results thereof,  made by or on behalf of
the  Underwriters,  the  Depositor  or any of its  officers or  directors or any
controlling   person,   and  will  survive   delivery  of  and  payment  of  the
Certificates.




                                       17
<PAGE>

     If this Agreement is terminated  pursuant to Section 9 or if for any reason
the purchase of the  Certificates by the  Underwriters is not  consummated,  the
Depositor shall remain  responsible for the expenses to be paid or reimbursed by
them  pursuant to Section  5(g),  and the  obligations  of the Depositor and the
Underwriters pursuant to Sections 7 and 8 shall remain in effect.

     12. Notices.  All communications  hereunder will be in writing and, if sent
to an Underwriter will be mailed,  delivered or telegraphed and confirmed to you
at  [Eleven  Madison  Avenue,  New  York,  New  York  10010]  or if  sent to the
Depositor,  will be mailed,  delivered  or  telegraphed  and  confirmed to it at
[Eleven  Madison  Avenue,  New  York,  New  York  10010  Attention:  President];
provided,  however, that any notice to an Underwriter pursuant to Section 7 or 8
will be mailed,  delivered or  telegraphed  to such  Underwriter  at the address
furnished by it.

     13.  Successors.  This Agreement and the Terms  Agreement will inure to the
benefit  of  and be  binding  upon  the  parties  hereto  and  their  respective
successors and the officers,  directors and controlling  persons  referred to in
Sections 7 and 8, and their  successors  and  assigns,  and no other person will
have any right or obligations hereunder.

     14.   Representation  of  Underwriters.   You  will  act  for  the  several
Underwriters  set forth in the applicable Terms Agreement in connection with the
transactions  described  in this  Agreement  and such Terms  Agreement,  and any
action  taken  by you  under  this  Agreement  will  be  binding  upon  all  the
Underwriters.

     15.  Applicable  Law. THIS  AGREEMENT  WILL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE  WITH  THE  LAWS OF THE  STATE  OF NEW  YORK  WITHOUT  REGARD  TO THE
PRINCIPLES OF CONFLICTS OF LAWS.

     16.  Counterparts.  This  Agreement  may  be  executed  in  any  number  of
counterparts,  each of which  shall be  deemed to be an  original,  but all such
counterparts shall together constitute one and the same instrument.




                                       18
<PAGE>



     If the foregoing is in accordance with your understanding of our agreement,
please sign and return to us a counterpart hereof,  whereupon,  it will become a
binding agreement among the Depositor and the several Underwriters in accordance
with its terms.




                                Very truly yours,



                             CREDIT SUISSE FIRST BOSTON MORTGAGE
                               SECURITIES CORP.,
                               as Depositor



                             By:________________________________
                                Name:
                                Title:





The  foregoing  Agreement is
hereby confirmed and accepted
as of the date first
above written.

CREDIT SUISSE FIRST BOSTON CORPORATION
as representative of the Underwriters




By:___________________________________
   Name:
   Title:




                                       19
<PAGE>


                                                                       EXHIBIT A

              CREDIT SUISSE FIRST BOSTON MORTGAGE SECURITIES CORP.
                                   (DEPOSITOR)

        [_____________________] Mortgage-Backed Pass-Through Certificates
                                 Series 200_-___

                                 TERMS AGREEMENT

                               [__________, 200_]

To:                    Credit    Suisse   First    Boston    Mortgage
                       Securities   Corp.,  as  Depositor  under  the
                       Pooling and Servicing  Agreement  dated as of
                       [_______ 1, 20__].

Re:                    Underwriting Agreement dated
                       [___________, 20__].

Title:                 [_______________] Mortgage-Backed Pass-Through
- - - - - - - - -----                  Certificates  Series  200_-___,
                       [Class A and Class M]

Underwriter:           Credit Suisse First Boston  Corporation is the
- - - - - - - - -----------            sole Underwriter.

Principal Amount:      $[________] (approximate)
- - - - - - - - ----------------

Pass-Through Rate:     Weighted average pass-through rate.
- - - - - - - - -----------------

Certificate Rating:
- - - - - - - - ------------------


Servicer:              _____________________  (in such capacity,  the
- - - - - - - - --------               "Servicer").

Trustee:               _____________________  (in such capacity,  the
- - - - - - - - -------                "Trustee").

Terms of Sale:         The purchase price payable by the  Underwriter
- - - - - - - - -------------          for the  [Class  A]  Certificates  is [__]% of
                       the  principal  amount  thereof,  plus accrued
                       interest  at the  Pass-Through  Rate  from the
                       date of initial  issuance.  The purchase price
                       payable by the  Underwriter  for the [Class M]
                       Certificates is [__]% of the principal  amount
                       thereof,   plus   accrued   interest   at  the
                       Pass-Through  Rate  from the  date of  initial
                       issuance  Payment of the purchase  price shall
                       be  in  immediately  available  Federal  funds
                       wired  to such  bank as may be  designated  by
                       the Depositor.

                       The [Class R]  Certificates issued pursuant to
                       the Pooling and Servicing Agreement are not
                       subject to this Agreement.



                                      A-1
<PAGE>

Underwriting           Notwithstanding  anything  to the  contrary in
Commissions:           the  Underwriting   Agreement,  no  additional
- - - - - - - - -----------            underwriting  commission  shall be  payable by
                       the   Depositor   to   the    Underwriter   in
                       connection    with   the   purchase   of   the
                       Certificates.

                       Public offering price and/or method of determin-
                       ing price at which the Underwriter will sell the
                       [Class A] and [Class M] Certificates is at vary-
                       ing prices to be determined at the time of sale
                       in one or more negotiated transactions.

Mortgage Loans:        The  mortgage  loans  (the  "Mortgage  Loans")
- - - - - - - - --------------         sold by  [__________]  (the  "Seller")  to the
                       Depositor   pursuant  to  the  Mortgage   Loan
                       Purchase  Agreement,  dated as of  [________1,
                       200_],  between the Depositor,  the Seller and
                       the  Underwriter and conveyed by the Depositor
                       to  the  Trust  pursuant  to the  Pooling  and
                       Servicing  Agreement,  dated as of [________1,
                       200_]    (the     "Pooling    and    Servicing
                       Agreement"),  among the Depositor, the Seller,
                       the Servicer and the Trustee.

Distribution Dates:    The  [__]  day  (or,  if  such  day  is  not a
- - - - - - - - ------------------     business  day,  the next  succeeding  business
                       day)   of   each   month,    commencing   with
                       [__________], 20__.

Delivery   Date  and   [______],   New   York   Time,   on  or  about
Location:              [________,  20__],  or at such  other time not
- - - - - - - - --------               later   than   seven   full    business   days
                       thereafter  as  may  be  agreed  upon,  at the
                       offices of [_____________].


                                      A-2
<PAGE>

     If the foregoing is in accordance with your understanding of our agreement,
please sign and return to us a counterpart hereof,  whereupon,  it will become a
binding agreement among the Depositor and the several Underwriters in accordance
with its terms.




                             CREDIT SUISSE FIRST BOSTON CORPORATION,



                             By:____________________________________
                                Name:
                                Title:
Accepted:

CREDIT SUISSE FIRST BOSTON MORTGAGE
SECURITIES CORP.,
as Depositor




By:________________________________
   Name:
   Title:





                                                                     Exhibit 3.1



                                    RESTATED

                          CERTIFICATE OF INCORPORATION

                                       OF

                    CS FIRST BOSTON MORTGAGE SECURITIES CORP.
                    -----------------------------------------


     CS  First  Boston  Mortgage   Securities  Corp.  (the   "Corporation"),   a
corporation   organized  and  existing  under  and  by  virtue  of  the  General
Corporation Law of Delaware,

     DOES HEREBY CERTIFY:

     FIRST:  That the original  Certificate of  Incorporation of the Corporation
was filed in the office of the  Secretary  of State of the State of  Delaware on
December 31, 1985.

     SECOND: That a Restated Certificate of Incorporation of the Corporation was
filed in the Office of the  Secretary  of State of the State of Delaware on July
28, 1986,  September  18, 1986,  March 6, 1987,  October 6, 1988 and January 25,
1989.

     THIRD: That the Restated Certificate of Incorporation of the Corporation is
hereby amended so as:

          (A) To amend  Article  3 to  expand  the  nature  of the  business  or
     purposes to be conducted or promoted by the Corporation; and

     FOURTH:  That  the  text  of  the  Corporation's  Restated  Certificate  of
Incorporation  is hereby  restated  and  integrated  and  amended to read in its
entirety as follows:


<PAGE>



                      RESTATED CERTIFICATE OF INCORPORAITON

                                       OF

                    CS FIRST BOSTON MORTGAGE SECURITIES CORP.
                    -----------------------------------------


     1. The name of the corporation is CS First Boston Mortgage Securities Corp.
(the "Corporation").

     2. The address of the registered  office of the Corporation in the State of
Delaware is 1013 Centre Road, Wilmington,  County of New Castle. The name of the
registered  agent  of the  Corporation  at  that  address  is The  Prentice-Hall
Corporation System, Inc.

     3. The nature of the  business or purposes to be  conducted  or promoted by
the Corporation is: (a)(i) to engage in the  establishment of one or more trusts
to hold pools of (A) whole mortgage loans, (B) manufactured  housing conditional
sales contracts and installment loan  agreements,  (C) loans made to finance the
purchase of cooperatively owned properties secured by assignments of shares of a
cooperative  corporation  and a  proprietary  lease or occupancy  agreement on a
cooperative  apartment,   (D)  "fully-modified   pass-through"   mortgage-backed
certificates,  fully  guaranteed as to principal and interest by the  Government
National Mortgage  Association  ("GNMA"),  Mortgage  Participation  Certificates
issued and guaranteed by the Federal Home Loan Mortgage  Corporation  ("FHLMC"),
Guaranteed  Mortgage  Pass-Through  Certificates  issued and  guaranteed  by the
Federal  National  Mortgage  Association  ("FNMA")  ("Agency  Certificates")  or
securities  ("Agency Stripped  Certificates")  issued and/or guaranteed by GNMA,
FHLMC or FNMA  and each of which  evidences  a  specified  undivided  fractional
interest  in  monthly  principal  and/or  interest  distributions  on a pool  of
mortgage  loans  or of  Agency  Certificates  (Agency  Certificates  and  Agency
Stripped Certificates,  collectively,  "Agency Securities"),  (E) other mortgage
pass-through certificates and (F) participations in, or



<PAGE>



obligations   secured  by,  whole  mortgage   loans  or  mortgage   pass-through
certificates,  including but not limited to Agency  Securities  (subsections (A)
through (F) above are referred to collectively as "Mortgage Securities"),  which
trusts will, in exchange for such pools of Mortgage  Securities,  deliver to the
Corporation series of pass-through  certificates  ("Certificates") each of which
series (1)  represents the undivided  ownership  interest in the related pool of
Mortgage  Securities  and (2) may be  structured to contain one or more classes,
each class having the characteristics  specified in the related trust agreement;
and, in  connection  therewith,  (ii) to acquire,  own,  hold,  sell,  transfer,
assign,  pledge,  finance,  refinance  and  otherwise  deal with  such  Mortgage
Securities;  (iii) to sell,  transfer,  assign,  pledge,  finance,  refinance or
otherwise deal with the series of Certificates;  and (iv) to engage in any other
acts and activities and to exercise any powers  permitted to corporations  under
the General  Corporation  Law of Delaware  which are incidental and necessary or
convenient to the foregoing; and (b)(i) to engage in the establishment of one or
more trusts to issue and sell series of bonds which are  governed by  indentures
and  collateralized by Mortgage  Securities and/or  Certificates  created by the
Corporation  or by any other  entity;  and,  in  connection  therewith,  (ii) to
acquire,  own, hold, sell,  transfer,  assign,  pledge,  finance,  refinance and
otherwise deal with such Mortgage Securities and/or Certificates; (iii) to sell,
transfer, assign and otherwise deal with any or all of its ownership interest in
any trust that it  establishes;  (iv) to acquire,  own,  hold,  sell,  transfer,
assign and otherwise  deal with any or all of the  ownership  interest in trusts
established by other entities, institutions or individuals; and (v) to engage in
any  other  acts  and  activities  and  to  exercise  any  powers  permitted  to
corporations under the General  Corporation Law of Delaware which are incidental
and necessary or  convenient  to the  foregoing.


                                       2
<PAGE>




     4. Notwithstanding any other provision of this Certificate of Incorporation
and any  provision  of law that  otherwise  so  empowers  the  Corporation,  the
Corporation  shall not take any of the following  actions,  if the effect of any
such action would be to adversely affect the rating that a nationally recognized
statistical rating agency has given to a series of bonds issued by a trust which
has been  established by the  Corporation  and at least 50% of which is owned by
the  Corporation:  (a) dissolve or liquidate,  in whole or in part; (b) merge or
consolidate with any other  corporation  other than a corporation  wholly owned,
directly or indirectly,  by CS First Boston, Inc., a Delaware  corporation,  and
having a certificate of  incorporation  containing  provisions  identical to the
provisions of Article 3 of this Certificate of Incorporation and this Article 4;
(c) incur or assume any indebtedness  except  indebtedness which may be incurred
to or assumed from a corporation  wholly owned,  directly or  indirectly,  by CS
First  Boston,  Inc. (an  "Affiliate")  or  guarantee  any  indebtedness  except
indebtedness of an Affiliate;  provided, however, that the Corporation shall not
incur,  assume or guarantee any such indebtedness  except in connection with its
activities   specified  in  Article  3;  or  (d)  amend  this   Certificate   of
Incorporation to alter in any manner or delete Article 3 or this Article 4.

     5. No  director  of the  Corporation  shall  be  personally  liable  to the
Corporation  or to its  stockholders  for  monetary  damages  for breach of such
director's fiduciary duty as a director,  provided that this Article 5 shall not
eliminate  or limit  the  liability  of a  director  (a) for any  breach  of the
director's duty of loyalty to the Corporation or its stockholders,  (b) for acts
or omissions  not in good faith or which  involve  intentional  misconduct  or a
knowing  violation of law, (c) under Section 174 of the General  Corporation Law
of  Delaware,  or (d) for any  transaction  from which the  director  derived an
improper personal benefit.


                                       3
<PAGE>


     6. The total number of shares which the Corporation shall have authority to
issue is one  thousand  (1,000)  shares of Common  Stock,  par value One  Dollar
($1.00) per share.

     7. The name and mailing address of the incorporator is as follows:

                     George S.  Springsteen,  Esq.
                     c/o  Cadwalader,  Wickersham & Taft
                     100 Maiden Lane
                     New York, New York 10038

     8. In furtherance and not in limitation of the powers conferred by statute,
the Board of Directors of the  Corporation  is  expressly  authorized  to adopt,
amend or repeal the by-laws of the Corporation.

     9. Election of directors of the  Corporation  need not be by written ballot
unless the  by-laws of the  Corporation  shall so  provide.


     10.  Subject  to the  limitations  in  Article  4 of  this  Certificate  of
Incorporation,  the Corporation  reserves the right to amend,  alter,  change or
repeal any provision  contained in this  Certificate  of  Incorporation,  in the
manner now or hereafter  prescribed by statute,  and all rights  conferred  upon
stockholders herein are granted subject to this reservation.



                                       4
<PAGE>


     FIFTH:  That the Restated  Certificate of Incorporation of the Corporation,
set  forth  hereinabove  in  Paragraph  FOURTH,  was  duly  adopted  by the sole
stockholder  of the  Corporation  in an Action by  Written  Consent  of the Sole
Stockholder  in accordance  with Section 3.10 of the by-laws of the  Corporation
and Sections 228, 242 and 245 of the General Corporation Law of Delaware.

     IN WITNESS  WHEREOF,  the  Corporation  has caused its corporate seal to be
affixed to the  certificate  and the  certificate  to be  assigned by William S.
Pitofsky,  Vice President of the  Corporation  and attested to by Lori M. Russo,
Secretary of the Corporation as of the 24th day of September, 1996.

                          CS FIRST BOSTON MORTGAGE SECURITIES CORP.


                          By /s/ William S. Pitofsky
                             ------------------------------------------
                             William S. Pitofsky,
                             Vice President



ATTEST:



/s/ Lori M. Russo
- - - - - - - - ----------------------
Lori M. Russo
      Secretary




                                       5
<PAGE>

            CERTIFICATE OF AMENDMENT OF CERTIFICATE OF INCORPORATION

                                       OF

                    CS FIRST BOSTON MORTGAGE SECURITIES CORP.

It is hereby certified that:

     1. The name of the corporation (hereinafter called the "corporation") is CS
FIRST BOSTON MORTGAGE SECURITIES CORP.

     2. The certificate of incorporation of the corporation is hereby amended by
striking out Article FIRST thereof and by  substituting  in lieu of said Article
the following new Article:

          "FIRST:  The name of the  corporation  is CREDIT  SUISSE  FIRST BOSTON
     MORTGAGE SECURITIES CORP."

     3. The amendment of the certificate of  incorporation  herein certified has
been duly  adopted and written  consent  has been given in  accordance  with the
provisions of Sections 228 and 242 of the General  Corporation  Law of the State
of Delaware.

Signed on December 10, 1996.




                                    /s/ Lori M. Russo
                                    -----------------
                                        Lori M. Russo, Secretary





                                                                     Exhibit 3.2

                     First Boston Mortgage Securities Corp.
                             (Delaware Corporation)

                                     BY-LAWS
                             ----------------------

                                    ARTICLE I
                                    ---------
                                     OFFICES
                                     -------

     Section 1.1. REGISTERED OFFICE.

     The registered  office of the Corporation in the State of Delaware shall be
located at the principal  place of business in that state of the  corporation or
individual  acting  as  the  Corporation's  registered  agent  in the  State  of
Delaware.

     Section 1.2. OTHER OFFICES.

     The Corporation may have other offices,  either within or without the State
of Delaware, at such place or places as the Board of Directors from time to time
may designate or the business of the Corporation may require.

                                   ARTICLE II

                            MEETINGS OF STOCKHOLDERS

     Section 2.1. DATE, TIME, AND PLACE.

     Meetings of stockholders of the Corporation  shall be held on such date and
at such time and place, either within or without the State of Delaware, as shall
be designated by the Board of Directors and stated in the written  notice of the
meeting or in a duly executed  written waiver of notice of the meeting.

     Section 2.2. ANNUAL MEETINGS.

     Annual meetings of stockholders  for the election of directors to the Board
of Directors and for the  transaction of such other business as may be stated in
the written notice of


<PAGE>



the meeting or as may  properly  come  before the meeting  shall be held on such
date and at such time and place, either within or without the State of Delaware,
as shall be  designated  by the Board of  Directors  and  stated in the  written
notice of the  meeting  or in a duly  executed  written  waiver of notice of the
meeting.

     Section 2.3. SPECIAL MEETINGS.

     Special  meetings  of  stockholders  for any  purpose or  purposes,  unless
otherwise  prescribed by the General  Corporation  Law of the State of Delaware,
the Certificate of Incorporation,  or these By-laws,  may be called by the Board
of Directors,  the Chairman of the Board, or the President.  Special meetings of
stockholders  shall be called by the  Chairman of the Board or the  Secretary at
the written request of stockholders  holding a majority of the aggregate  number
of shares of common stock of the Corporation issued and outstanding and entitled
to vote at such  meeting.  Such  written  request  shall  state the  purpose  or
purposes for which the special meeting is called. The place, date, and time of a
special  meeting shall be fixed by the Board of Directors or the officer calling
the  meeting and shall be stated in the written  notice of such  meeting,  which
notice  shall  state the  purpose or  purposes  for which the meeting is called.
Business  transacted  at a special  meeting  shall be confined to the purpose or
purposes  stated in the written notice of meeting and matters  germane  thereto.


     Section 2.4. NOTICE OF MEETINGS.

     Written  notice of the place,  date, and time of, and the general nature of
the business to be transacted  at, a meeting of  stockholders  shall be given to
each  stockholder  of record  entitled  to vote at such  meeting,  in the manner
prescribed by Section 6.1 of these By-laws, not less than ten (10) nor more than
sixty (60) days prior to the date of the  meeting,  except that where the matter
to be acted upon at the meeting is a merger or consolidation of the Corporation,



                                       2
<PAGE>




or a sale,  lease, or exchange of all or substantially  all of the Corporation's
assets, such notice shall be given not less than twenty (20) nor more than sixty
(60) days prior to such meeting.

     Section 2.5. STOCKHOLDER LIST.

     The Secretary or other officer in charge of the stock ledger of the
Corporation shall prepare and make, at least ten (10) days prior to a meeting of
stockholders,  a complete list of stockholders  entitled to vote at the meeting,
arranged in alphabetical  order, and showing the address of each stockholder and
the number  and class of shares of stock of the  Corporation  registered  in the
name of each  stockholder.  Such  list  shall  be  open  to  examination  by any
stockholder,  for any purpose germane to the meeting,  during ordinary  business
hours, for a period of at least ten (10) days prior to the meeting,  either at a
place  within the city where the  meeting is to be held,  which  place  shall be
specified in the notice of the meeting,  or, if not so  specified,  at the place
where the meeting is to be held. The list also shall be produced and kept at the
place  and  time of the  meeting  during  the  whole  time  thereof,  and may be
inspected by any stockholder who is present.

     Section 2.6. VOTING RIGHTS.

     In order that the  Corporation may determine the  stockholders  entitled to
notice of, and to vote at, a meeting of  stockholders  or at any  adjournment(s)
thereof or to express consent or dissent to corporate  action in writing without
a meeting, the Board of Directors may fix a record date in the manner prescribed
by Section 9.1 of these By-laws.  Each stockholder entitled to vote at a meeting
of stockholders or to express consent or dissent to corporate  action in writing
without a meeting  may  authorize  another  person  or  persons  to act for such
stockholder  by proxy in the manner  prescribed by Section 2.7 of these By-laws.
Except as specifically  provided otherwise by the General Corporation Law of the
State of Delaware,  the  Certificate of  Incorporation,  or these By-laws,  each
holder of common stock entitled to vote at a meeting of



                                       3
<PAGE>




stockholders  or to express  consent or dissent to  corporate  action in writing
without  a  meeting  shall be  entitled  to one  vote  for  each  share of stock
registered  in  such  stockholder's  name  on  the  books  and  records  of  the
Corporation as of the record date.

     Section 2.7. PROXIES.

     Each proxy shall be in writing  and shall be  executed  by the  stockholder
giving the proxy or by such  stockholder's  duly authorized  attorney.  No proxy
shall be voted or acted  upon after  three (3) years  from its date,  unless the
proxy  expressly  provides for a longer  period.  Unless and until voted,  every
proxy shall be revocable at the pleasure of the person who executed it or of his
legal  representative  or assigns,  except in those  cases where an  irrevocable
proxy  permitted by the General  Corporation  Law of the State of Delaware shall
have been given.

     Section 2.8. QUORUM AND ADJOURNMENT(S) OF MEETINGS.

     Except as specifically provided otherwise by the General Corporation Law of
the State of Delaware,  the Certificate of  Incorporation,  or these By-laws,  a
majority  of  the  aggregate  number  of  shares  of  common  stock  issued  and
outstanding  and entitled to vote,  present in person or  represented  by proxy,
shall  constitute  a quorum  for the  transaction  of  business  at a meeting of
stockholders.  If such majority shall not be present in person or represented by
proxy at a meeting of stockholders,  the stockholders  entitled to vote thereat,
present in person or represented  by proxy,  shall have the power to adjourn the
meeting  from time to time until  holders of the  requisite  number of shares of
stock  entitled to vote at the meeting shall be present in person or represented
by proxy. When a meeting of stockholders is adjourned to another place, date, or
time, notice need not be given of the adjourned meeting if the place,  date, and
time of such  adjourned  meeting  are  announced  at the  meeting  at which  the
adjournment is taken.  At any such adjourned  meeting at which a quorum shall be
present  in person  or  represented  by proxy,  stockholders  may  transact  any
business that might have been transacted at the meeting as



                                       4
<PAGE>

originally noticed, but only those stockholders  entitled to vote at the meeting
as originally noticed shall be entitled to vote at any  adjournment(s)  thereof.
If  the  adjournment  is for  more  than  thirty  (30)  days,  or if  after  the
adjournment  a new record date is fixed for the adjourned  meeting,  a notice of
the adjourned  meeting shall be given to each  stockholder of record entitled to
vote at the meeting.

     Section 2.9. REQUIRED VOTE.

     Except as specifically provided otherwise by the General Corporation Law of
the State of Delaware,  the Certificate of Incorporation,  or these By-laws, the
affirmative  vote of a majority of the shares of common stock  present in person
or  represented  by proxy at a  meeting  of  stockholders  at which a quorum  is
present and entitled to vote on the subject matter  (including,  but not limited
to, the election of directors to the Board of Directors) shall be the act of the
stockholders with respect to the matter voted upon.

     Section 2.10. ACTION WITHOUT MEETING.

     Notwithstanding  contrary  provisions of these By-laws covering notices and
meetings,  any action  required or permitted to be taken at an annual or special
meeting of stockholders may be taken by stockholders without a meeting,  without
prior  notice,  and  without a vote if a consent in writing,  setting  forth the
action so taken,  shall be signed by the  holders of shares of stock  issued and
outstanding  and entitled to vote on the subject matter having not less than the
minimum number of votes that would be necessary to authorize or take such action
at a meeting of  stockholders at which all such shares of stock entitled to vote
thereon  were  present and voted.  Prompt  notice of the taking of  corporate or
other action by  stockholders  without a meeting by less than unanimous  written
consent  of  stockholders  shall be given  to  those  stockholders  who have not
consented in writing.



                                       5
<PAGE>


                                  ARTICLE III
                                  -----------

                                    DIRECTORS
                                    ---------

     Section 3.1. BOARD OF DIRECTORS.

     The business and affairs of the  Corporation  shall be managed by, or under
the direction of, a Board of Directors.  The Board of Directors may exercise all
such  powers of the  Corporation  and do all such  lawful acts and things on its
behalf as are not by the General  Corporation Law of the State of Delaware,  the
Certificate  of  Incorporation,  or these  By-laws  directed  or  required to be
exercised or done by stockholders.

     Section 3.2. NUMBER, ELECTION, AND TENURE.

     The number of directors which shall constitute the whole Board of Directors
shall be fixed from time to time by resolution of the Board of Directors.  In no
event shall the total number of directors which shall constitute the whole Board
of  Directors be fixed by the Board of Directors at less than one (1). The Board
of Directors  shall not at any time decrease the total number of directors which
shall constitute the whole Board of Directors if to do so would shorten the term
of any  incumbent  director.  With the exception of the first Board of Directors
which shall be elected by the  incorporator  of the  Corporation,  and except as
provided  otherwise in these By-laws,  directors  shall be elected at the annual
meeting  of  stockholders.  Each  director  shall hold  office  until the annual
meeting of  stockholders  next  succeeding his election or appointment and until
his  successor  is elected and  qualified  or until his earlier  resignation  or
removal.

     Section 3.3. RESIGNATION AND REMOVAL.

     Any  director,  or member of a  committee  of the Board of  Directors,  may
resign at any time upon written  notice to the Board of Directors,  the Chairman
of the Board, or the President.  Unless specified  otherwise in the notice, such
resignation shall take effect upon



                                       6
<PAGE>


receipt of the notice by the Board of Directors,  the Chairman of the Board,  or
the President. The acceptance of a resignation shall not be necessary to make it
effective.  Any  director  may be  removed,  either  with or without  cause,  as
provided by the General Corporation Law of the State of Delaware.

     Section 3.4. VACANCIES AND NEWLY-CREATED DIRECTORSHIPS.

     Vacancies   occurring  for  any  reason  and  newly-created   directorships
resulting  from an increase in the  authorized  number of directors  which shall
constitute  the whole Board of  Directors,  as fixed  pursuant to Section 3.2 of
these  By-laws,  may be filled by a majority  of the  directors  then in office,
although less than a quorum, or by a sole remaining  director,  and any director
so chosen  shall hold  office  until the annual  meeting  of  stockholders  next
succeeding his election or appointment  and until his successor shall be elected
and qualified or until his earlier resignation or removal.

     Section 3.5. COMPENSATION.

     Each director on the Board of Directors and on any committee  thereof shall
receive  for  services   rendered  as  a  director  and  committee  member  such
compensation  as may be fixed from time to time by the Board of  Directors.  The
directors  and  committee  members also may be paid their  expenses,  if any, in
attending meetings of the Board of Directors or any committee  thereof.  Nothing
in these  By-laws  shall be construed to preclude any director  from serving the
Corporation  in any other  capacity  as an  officer,  agent,  or  otherwise  and
receiving compensation therefor.



                                       7
<PAGE>


                                   ARTICLE IV
                                   ----------

                       MEETINGS OF THE BOARD OF DIRECTORS
                       -----------------------------------

     Section 4.1. DATE, TIME, AND PLACE.

     Meetings of the Board of  Directors  shall be held on such date and at such
time and place,  either  within or without  the State of  Delaware,  as shall be
determined by the Board of Directors pursuant to these By-laws.

     Section 4.2. ANNUAL MEETINGS.

     After the  annual  meeting  of  stockholders,  the  newly-elected  Board of
Directors  may hold a meeting,  on such date and at such time and place as shall
be  determined  by the Board of  Directors,  for the  purpose  of  organization,
election of officers,  and such other business that may properly come before the
meeting. Such meeting may be held without notice.

     Section 4.3. REGULAR MEETINGS.

     Regular  meetings of the Board of Directors  may be held without  notice on
such date and at such time and place as shall be determined from time to time by
the Board of Directors.

     Section 4.4. SPECIAL MEETINGS.

     Special meetings of the Board of Directors may be held at any time upon the
call of the Chairman of the Board,  the President,  or the Secretary by means of
oral,  telephonic,  written,  telegraphic,  cable, or other similar notice, duly
given, delivered,  sent, or mailed to each director, in the manner prescribed by
Section 6.1 of these By-laws,  not less than two (2) days prior to such meeting.
Special  meetings  of the  Board of  Directors  may be held at any time  without
notice if all of the  directors  are present or if those  directors  not present
waive  notice of the meeting in writing  either  before or after the date of the
meeting.



                                       8
<PAGE>

     Section 4.5. QUORUM.

     Except as specifically provided otherwise by the General Corporation Law of
the State of  Delaware,  a majority  of the whole Board of  Directors,  as fixed
pursuant  to Section 3.2 of these  By-laws,  shall  constitute  a quorum for the
transaction  of  business  at a meeting of the Board of  Directors.  If a quorum
shall not be  present  at a meeting  of the Board of  Directors,  the  directors
present thereat may adjourn the meeting from time to time,  without notice other
than announcement at the meeting, until a quorum shall be present.

     Section 4.6. REQUIRED VOTE.

     Except as specifically provided otherwise by the General Corporation law of
the State of  Delaware,  the  affirmative  vote of a majority  of the  directors
present  at a meeting  of the Board of  Directors  at which a quorum is  present
shall be the act of the Board of  Directors  with  respect to the  matter  voted
upon.

     Section 4.7. ACTION WITHOUT MEETING.

     Any action  required or  permitted to be taken at a meeting of the Board of
Directors,  or committee thereof, may be taken by directors without a meeting if
all of the members of the Board of  Directors,  or  committee  thereof,  consent
thereto in writing and such writing is filed with the minutes of  proceedings of
the Board of Directors, or committee thereof.

     Section 4.8. TELEPHONE MEETINGS.

     Members  of  the  Board  of  Directors,   or  any  committee  thereof,  may
participate  in a meeting of the Board of Directors,  or committee  thereof,  by
means of conference  telephone or similar  communications  equipment by means of
which all of the  members  participating  in the  meeting  can hear each  other.
Participation  by members of the Board of Directors,  or committee  thereof,  by
such means shall constitute  presence in person of such members at such meeting.



                                       9
<PAGE>


                                   ARTICLE V
                                   ---------

                      COMMITTEES OF THE BOARD OF DIRECTORS
                      ------------------------------------

     Section 5.1. DESIGNATION AND POWERS.

     The Board of Directors may designate  one or more  committees  from time to
time in its  discretion,  by  resolution  passed  by the  affirmative  vote of a
majority of the whole Board of  Directors,  as fixed  pursuant to Section 3.2 of
these By-laws.  Each committee  shall consist of one or more of the directors on
the  Board of  Directors.  The  Board of  Directors  may  designate  one or more
directors as alternate  members of any  committee  who may replace any absent or
disqualified  member  at  any  meeting  of the  committee.  In  the  absence  or
disqualification  of a member of a  committee,  the  member or  members  thereof
present at any meeting and not  disqualified  from  voting,  whether or not such
member or members constitute a quorum, may unanimously appoint another member of
the Board of  Directors to act at the meeting in the place of any such absent or
disqualified  member.  Any  such  committee,  to  the  extent  provided  in  the
resolution  of the Board of  Directors,  shall have and may  exercise all of the
powers and authority of the Board of Directors in the management of the business
and affairs of the  Corporation  and may  authorize  the  corporate  seal of the
Corporation  to be  affixed  to all  papers  which may  require  it; but no such
committee  shall  have the power or  authority  in  reference  to  amending  the
Certificate of Incorporation  or these By-laws,  adopting an agreement of merger
or  consolidation,  recommending to stockholders the sale, lease, or exchange of
all  or  substantially  all  of  the  Corporation's   property  and  assets,  or
recommending to stockholders a dissolution of the Corporation or a revocation of
a dissolution; and, unless the resolution of the Board of Directors expressly so
provides,  no such  committee  shall  have the power or  authority  to declare a
dividend or to authorize the issuance of stock of the  Corporation  or any class
or series of stock. Each



                                       10
<PAGE>



committee  shall keep regular  minutes of its meetings and shall report the same
to the Board of Directors when requested to do so.

                                   ARTICLE VI
                                   ----------

                                     NOTICES
                                     -------

     Section 6.1. DELIVERY OF NOTICE.

     Notices to stockholders and, except as permitted below, to directors on the
Board  of  Directors  shall be in  writing  and may be  delivered  by mail or by
messenger.  Notice  by mail  shall be  deemed  to be given at the time when such
notice is deposited in a United States post office or letter box,  enclosed in a
post-paid  sealed  wrapper,  and addressed to a  stockholder  or director at his
respective address appearing on the books and records of the Corporation, unless
such  stockholder  or  director  shall have filed with the  Secretary  a written
request that  notices  intended  for such  stockholder  or director be mailed or
delivered to some other address,  in which case the notice shall be mailed to or
delivered at the address  designated in such request.  Notice by messenger shall
be  deemed  to be given  when  such  notice is  delivered  to the  address  of a
stockholder  or director as specified  above.  Notices to directors  also may be
given orally in person or by telephone,  or by telex, telegram,  cable, or other
similar  means,  or by leaving  the notice at the  residence  or usual  place of
business of a director. Notice by oral communication, telex, telegram, cable, or
other  similar  means shall be deemed to be given upon  dispatch of such notice.
Notice by messenger shall be deemed to be given when such notice is delivered to
a director's residence or usual place of business.  Notices, requests, and other
communications  required  or  permitted  to be  given  or  communicated  to  the
Corporation by the  Certificate of  Incorporation,  these By-laws,  or any other
agreement  shall be in writing and may be delivered by messenger,  United States
mail, telex, telegram,  cable, or other similar means. Notice to the Corporation
shall  be  deemed  to be  given  upon  actual  receipt  of  such  notice  by the
Corporation.



                                       11
<PAGE>

     Section 6.2. WAIVER OF NOTICE.

     Whenever  notice is required to be given by the General  Corporation Law of
the State of Delaware,  the Certificate of  Incorporation,  or these By-laws,  a
written waiver of notice, signed by the person entitled thereto,  whether before
or after the time stated in the notice,  shall be deemed  equivalent  to notice.
Attendance of a person at a meeting shall  constitute a waiver of notice of such
meeting,  except when the person attends the meeting for the express  purpose of
objecting,  at the beginning of the meeting,  to the transaction of any business
because the meeting is not lawfully called or convened.  Neither the business to
be  transacted  at,  nor the  purpose  of, any  regular  or  special  meeting of
stockholders, Board of Directors, or committee of the Board of Directors need be
specified in any written waiver of notice.

                                   ARTICLE VII
                                   -----------

                                    OFFICERS
                                    --------

     Section 7.1. OFFICERS.

     At its annual meeting, or at such other meeting as it may determine,  or by
unanimous  written  consent  of the  directors  without  meeting,  the  Board of
Directors  shall elect a Chairman of the Board,  a  President,  one or more Vice
Presidents,  a Treasurer,  and a Secretary,  and may elect one or more Assistant
Treasurers,  Assistant  Secretaries,  and such  other  officers  as the Board of
Directors from time to time may designate or the business of the Corporation may
require. The Chairman of the Board shall be selected from among the directors on
the Board of Directors,  but no other executive  officer need be a member of the
Board of  Directors.  Any  number  of  offices  may be held by the same  person.

     Section 7.2. OTHER OFFICERS AND AGENTS.

     The Board of Directors also may elect such other officers and agents as the
Board  of  Directors  from  time to time may  determine  to be  advisable.  Such
officers and agents shall



                                       12
<PAGE>


serve for such terms,  exercise such powers, and perform such duties as shall be
specified from time to time by the Board of Directors.

     Section 7.3. TENURE, RESIGNATION, REMOVAL, AND VACANCIES.

     Each officer of the  Corporation  shall hold his office until his successor
is elected and qualified, or until his earlier resignation or removal; provided,
that if the term of office of any  officer  elected  pursuant  to Section 7.2 of
these By-laws shall have been fixed by the Board of Directors, such person shall
cease to hold such  office no later  than the date of  expiration  of such term,
regardless  of whether any other  person shall have been elected or appointed to
succeed him. Any officer elected by the Board of Directors may be removed at any
time, with or without cause, by the Board of Directors;  provided, that any such
removal  shall be without  prejudice  to the  rights,  if any, of the officer so
employed under any employment  contract or other agreement with the Corporation.
Any  officer  may  resign  at any  time  upon  written  notice  to the  Board of
Directors,  the  Chairman  of the  Board,  or the  President.  Unless  specified
otherwise in the notice,  such resignation shall take effect upon receipt of the
notice by the Board of Directors,  the Chairman of the Board,  or the President.
The acceptance of the  resignation  shall not be necessary to make it effective.
Any vacancy  occurring in any office of the  Corporation by death,  resignation,
removal,  or  otherwise  shall be  filled  by the  Board of  Directors  and such
successor or  successors  shall hold office for such term as may be specified by
the Board of Directors.

     Section 7.4. COMPENSATION.

     The  salaries  or  other   compensation  of  officers  and  agents  of  the
Corporation  elected by the Board of Directors  shall be fixed from time to time
by the Board of Directors.

     Section 7.5. AUTHORITY AND DUTIES.

     All officers and agents, as between  themselves and the Corporation,  shall
have such authority and perform such duties in the management of the Corporation
as may be


                                       13
<PAGE>


provided in these By-laws and as generally pertain or are necessarily incidental
to the  particular  office or  agency.  In  addition  to the  powers  and duties
hereinafter specifically prescribed for certain officers of the Corporation, the
Board of  Directors  from  time to time may  impose  or  confer  upon any of the
officers  such  additional  duties and powers as the Board of Directors  may see
fit,  and the Board of  Directors  from time to time may impose or confer any or
all of the duties and powers hereinafter specifically prescribed for any officer
upon any other  officer or  officers.  The Board of  Directors  may give general
authority to any officer to affix the corporate seal of the  Corporation  and to
attest the affixing by his signature.

     Section 7.6. THE CHAIRMAN OF THE BOARD.

     The  Chairman  of the Board  shall be the chief  executive  officer  of the
Corporation.  He shall preside at all meetings of stockholders  and of the Board
of Directors,  and shall be a member of all standing  committees of the Board of
Directors.  The  Chairman  of the Board  shall have  general  management  of the
business of the  Corporation,  shall see that all  resolutions and orders of the
Board of  Directors  are carried  into  effect,  shall vote,  in the name of the
Corporation,  stock or securities in other  corporations or associations held by
the  Corporation  unless another officer is designated by the Board of Directors
for  that  purpose,  and  in  connection  with  all of the  foregoing  shall  be
authorized  to  delegate to the  President  and the other  officers  such of his
powers and such of his duties as he may deem to be advisable.

     Section 7.7. THE PRESIDENT.

     The President shall be the chief  operating  officer of the Corporation and
shall have general and active management, supervision, direction, and control of
the  business of the  Corporation.  He shall assist the Chairman of the Board in
the  management of the  Corporation  and in the absence or disability of or upon
the  delegation by the Chairman of the Board he shall preside at all meetings of
stockholders and of the Board of Directors. He shall report from time to time



                                       14
<PAGE>

to the Board of Directors all matters within his knowledge which the interest of
the  Corporation  may  require to be brought  to the  attention  of the Board of
Directors. The President shall have the general powers and duties of supervision
and management  usually  vested in the office of president of a corporation  and
shall  exercise such powers and perform such duties as generally  pertain or are
necessarily  incidental  to his  office  and shall  have such  other  powers and
perform  such other duties as may be  specifically  assigned to him from time to
time by the Board of Directors or the Chairman of the Board. Except as the Board
of Directors  shall  authorize  the execution  thereof in some other manner,  he
shall execute  bonds,  mortgages,  and other  contracts for and on behalf of the
Corporation  and shall cause the corporate seal of the Corporation to be affixed
to any  instrument  requiring it, and when so affixed the seal shall be attested
by the signature of the Secretary or the Treasurer or an Assistant  Secretary or
an Assistant Treasurer.

     Section 7.8. THE VICE PRESIDENT(S).

     The Vice  President,  or if there be more  than one,  the Vice  Presidents,
shall perform such duties as may be  specifically  assigned to them from time to
time by the Board of Directors,  the Chairman of the Board, or the President. In
case  of the  absence  or  disability  of the  President,  and if the  Board  of
Directors,  the Chairman of the Board,  or the President has so authorized,  the
Vice President, or if there be more than one Vice President, such Vice President
as the Board of  Directors,  the  Chairman of the Board or the  President  shall
designate, shall perform the duties of the Office of the President.

     Section 7.9. THE TREASURER.

     The Treasurer shall have the custody of the corporate funds and
securities   and  shall  keep  full  and  accurate   accounts  of  receipts  and
disbursements  in books  and  records  belonging  to the  Corporation.  He shall
deposit all moneys and other  valuable  effects in the name and to the credit of
the  Corporation  in such  depositories  as may be  designated  by the  Board of



                                       15
<PAGE>


Directors or any officer of the Corporation authorized by the Board of Directors
to make such  designation.  The Treasurer shall exercise such powers and perform
such duties as generally pertain or are necessarily incidental to his office and
shall perform such other duties as may be specifically assigned to him from time
to time by the Board of Directors,  the Chairman of the Board, or the President.
The Treasurer shall disburse the funds of the Corporation as may be ordered by
the Board of  Directors,  the Chairman of the Board,  or the  President,  taking
proper vouchers for such  disbursements.  He shall render to the Chairman of the
Board,  the  President,  and the Board of Directors  (at its regular and special
meetings),  or  whenever  any of them may  request  it, an account of all of his
transactions as Treasurer and of the financial condition of the Corporation.  If
required by the Board of Directors, he shall give the Corporation a bond in such
sum and with such surety or sureties  as shall be  satisfactory  to the Board of
Directors for the faithful  performance  of the duties of his office and for the
restoration to the Corporation,  in case of his death, resignation,  retirement,
or removal  from  office,  of all books,  papers,  vouchers,  moneys,  and other
property of whatever kind in his  possession  or under his control  belonging to
the Corporation.

     Section 7.10. THE ASSISTANT TREASURER(S).

     The  Assistant  Treasurer,  or if there be more  than  one,  the  Assistant
Treasurers,  shall perform such duties as may be  specifically  assigned to them
from time to time by the Board of Directors,  the Chairman of the Board,  or the
President.  In case of the absence or  disability of the  Treasurer,  and if the
Board  of  Directors,  the  Chairman  of  the  Board,  or the  President  has so
authorized,  the  Assistant  Treasurer,  or if there be more than one  Assistant
Treasurer,  such Assistant Treasurer as the Board of Directors,  the Chairman of
the Board,  or the President  shall  designate,  shall perform the duties of the
office of the Treasurer.



                                       16
<PAGE>

     Section 7.11. THE SECRETARY.

     The  Secretary  shall attend all meetings of the Board of Directors and all
meetings of stockholders and record all votes and record the proceedings of such
meetings in a book to be kept for that purpose. He shall perform like duties for
any  committees of the Board of Directors  when required or requested.  He shall
give,  or cause to be given,  notice of all meetings of  stockholders  and, when
necessary,  of the Board of Directors.  The Secretary shall exercise such powers
and perform such duties as generally  pertain or are  necessarily  incidental to
his office and shall perform such other duties as may be  specifically  assigned
to him from time to time by the Board of  Directors,  the Chairman of the Board,
or the President.  The Secretary shall have custody of the corporate seal of the
Corporation and he, or an Assistant Secretary, shall have authority to affix the
corporate seal to any  instrument  requiring it, and when so affixed it shall be
attested by his signature or by the signature of an Assistant Secretary.

     Section 7.12. THE ASSISTANT SECRETARY(IES).

     The  Assistant  Secretary,  or if there be more  than  one,  the  Assistant
Secretaries,  shall perform such duties as may be specifically  assigned to them
from time to time by the Board of Directors,  the Chairman of the Board,  or the
President.  In case of the absence or  disability of the  Secretary,  and if the
Board  of  Directors,  the  Chairman  of  the  Board,  or the  President  has so
authorized,  the  Assistant  Secretary,  or if there be more than one  Assistant
Secretary,  such Assistant Secretary as the Board of Directors,  the Chairman of
the Board or the  President  shall  designate,  shall  perform the duties of the
office of the Secretary.



                                       17
<PAGE>


                                  ARTICLE VIII
                                  ------------

                              CERTIFICATES OF STOCK
                              ---------------------

     Section 8.1. FORM AND SIGNATURE.

     The stock certificates  representing  common stock of the Corporation shall
be in such form or forms not inconsistent  with the Certificate of Incorporation
and these  By-laws as the Board of  Directors  shall  approve from time to time.
Stock certificates  shall be numbered,  the certificates for the shares of stock
of each class to be  numbered  consecutively,  and shall be entered in the books
and records of the Corporation as such  certificates are issued.  No certificate
shall be issued for any share until the  consideration  therefor  has been fully
paid. Stock  certificates  shall exhibit the holder's name, certify the class of
stock and the number of shares in such class of stock owned by the  holder,  and
shall be signed (a) by the  Chairman of the Board,  or any Vice  Chairman of the
Board, or the President, or any Vice President, and (b) by the Treasurer, or any
Assistant Treasurer, or the Secretary, or any Assistant Secretary. Any or all of
the signatures on a stock  certificate  may be facsimiles.  In case any officer,
transfer  agent,  or registrar who has signed or whose  facsimile  signature has
been  placed on a  certificate  shall have ceased to be such  officer,  transfer
agent, or registrar before such  certificate is issued,  such certificate may be
issued by the  Corporation  with the same  effect  as if he were  such  officer,
transfer agent, or registrar on the date of issuance.

     Section 8.2. LOST, STOLEN, OR DESTROYED CERTIFICATES.

     The Board of Directors may direct that a new stock certificate be issued in
place of any certificate  theretofore issued by the Corporation which is alleged
to have been lost, stolen, or destroyed, upon the making of an affidavit of that
fact by the person,  or his legal  representative,  claiming the  certificate of
stock to be lost, stolen, or destroyed.  When authorizing such issuance of a new
certificate, the Board of Directors, in its discretion and as a condition



                                       18
<PAGE>

precedent to the issuance thereof, may require the owner of the lost, stolen, or
destroyed  certificate,  or his legal  representative,  to advertise the same in
such  manner  as the  Board  of  Directors  shall  require  and/or  to give  the
Corporation  a bond in such  sum as the  Board  of  Directors  shall  direct  as
indemnity  against  any claim  that may be made  against  the  Corporation,  any
transfer  agent,  or any  registrar on account of the alleged  loss,  theft,  or
destruction of any such certificate or the issuance of such new certificate.

     Section 8.3. REGISTRATION OF TRANSFER.

     Shares of common stock of the Corporation  shall be transferable  only upon
the  Corporation's  books by the  holders  thereof  in person  or by their  duly
authorized  attorneys or legal  representatives,  and upon such transfer the old
certificates  shall be surrendered to the Corporation by the delivery thereof to
the  person  in  charge of the stock  and  transfer  books  and  ledgers  of the
Corporation,  or to such other person as the Board of Directors  may  designate.
Upon surrender to the Corporation of a certificate for shares,  duly endorsed or
accompanied  by proper  evidence of  succession,  assignment,  or  authority  to
transfer,  the Corporation  shall issue a new certificate to the person entitled
thereto, cancel the old certificate, and record the transaction on its books and
records.

                                   ARTICLE IX
                                   ----------

                               GENERAL PROVISIONS
                               ------------------

     Section 9.1. RECORD DATE.

     In order that the  Corporation may determine the  stockholders  entitled to
notice of, and to vote at, a meeting of  stockholders,  or to express consent or
dissent to corporate action in writing without  meeting,  or entitled to receive
payment of any dividend or other  distribution  or  allotment of any rights,  or
entitled  to  exercise  any  rights in  respect of any  change,  conversion,  or
exchange of stock,  or for the purpose of any other lawful action,  the Board of
Directors may fix,



                                       19
<PAGE>


in advance,  a record date which shall not be more than sixty (60) nor less than
ten (10) days  prior to the date of such  meeting  nor more than sixty (60) days
prior to any other action. A determination of stockholders of record entitled to
notice  of,  and to vote  at,  a  meeting  of  stockholders  shall  apply to any
adjournment(s) of such meeting;  provided,  however, that the Board of Directors
may fix a new record date for the adjourned meeting.

     Section 9.2. REGISTERED STOCKHOLDERS.

     Except as specifically provided otherwise by the General Corporation Law of
the State of  Delaware,  the  Corporation  shall be  entitled to  recognize  the
exclusive right of a person  registered on its books and records as the owner of
shares of stock of the  Corporation  to  receive  dividends  and to vote as such
owner,  shall be entitled to hold such person liable for calls and  assessments,
and shall not be bound to recognize any equitable or other claim to, or interest
in, such stock on the part of any other person,  whether or not the  Corporation
shall have express or other notice thereof.

     Section 9.3. DIVIDENDS.

     The Board of Directors,  in its sole and absolute  discretion  from time to
time, may declare and pay dividends upon the shares of the Corporation's capital
stock out of funds legally  available  therefor.  Before declaring or paying any
dividend,  the  Board  of  Directors  may  set  aside  out of any  funds  of the
Corporation  available for dividends such sum or sums as the Board of Directors,
from time to time in its absolute discretion, shall think proper as a reserve or
reserves to meet contingencies, or for equalizing dividends, or for repairing or
maintaining  any property of the  Corporation,  or for such other purpose as the
Board of Directors  shall think  conducive to the interests of the  Corporation,
and the Board of Directors  may modify or abolish any such reserve in the manner
in which it was created.



                                       20
<PAGE>

     Section 9.4. CHECKS AND NOTES.

     All checks and drafts on the bank accounts of the Corporation, all bills of
exchange  and  promissory  notes  of  the  Corporation,   and  all  acceptances,
obligations,  and other  instruments for the payment of money drawn,  signed, or
accepted by the Corporation shall be signed or accepted,  as the case may be, by
such  officer  or  officers,  agent or  agents,  and in such  manner as shall be
thereunto  authorized from time to time by the Board of Directors or by officers
of  the  Corporation   designated  by  the  Board  of  Directors  to  make  such
authorization.

     Section 9.5. FISCAL YEAR.

     The fiscal year of the  Corporation  shall commence on January 1 and end on
December 31 of each year,  unless  otherwise fixed by resolution of the Board of
Directors.

     Section 9.6. CORPORATE SEAL.

     The  corporate  seal shall be  circular  in form and shall  have  inscribed
thereon the name of the Corporation, the year of its organization, and the words
"Corporate  Seal,  Delaware".  The seal may be used by causing it or a facsimile
thereof to be impressed, affixed, or otherwise reproduced.

     SECTION 9.7. VOTING OF SECURITIES OF OTHER ISSUERS.

     In the event that the  Corporation  shall own and/or have power to vote any
securities (including, but not limited to, shares of stock) of any other issuer,
such  securities  shall be voted by the  Chairman  of the Board as  provided  in
Section  7.6 of these  By-laws,  or by such  other  person or  persons,  to such
extent, and in such manner as may be determined by the Board of Directors.

     Section 9.8. TRANSFER AGENTS.

     The Board of Directors may make such rules and  regulations  as it may deem
expedient  concerning the issuance,  transfer,  and  registration  of securities
(including, but not



                                       21
<PAGE>

limited to, stock) of the Corporation. The Board of Directors may appoint one or
more  transfer  agents and/or one or more  registrars  and may require all stock
certificates and other certificates  evidencing securities of the Corporation to
bear the signature of either or both.

     Section 9.9. BOOKS AND RECORDS.

     Except as specifically provided otherwise by the General Corporation Law of
the State of Delaware,  the books and records of the  Corporation may be kept at
such place or places,  either within or without the State of Delaware, as may be
designated by the Board of Directors.

                                    ARTICLE X
                                    ---------

                                 INDEMNIFICATION
                                 ---------------

     Section 10.1. INDEMNIFICATION.

     The Corporation  shall provide for the  indemnification,  within the limits
permitted by the General Corporation Law of the State of Delaware, of directors,
officers,  employees,  and agents of the  Corporation,  and of persons who serve
other  enterprises  in  such  or  similar  capacities  at  the  request  of  the
Corporation,  against expenses,  including  attorney's fees, and liabilities for
actions they take in such capacities. Such indemnification shall not exclude any
other rights to which a person seeking indemnification may be entitled under any
agreement,  vote of stockholders or  disinterested  directors or otherwise.  The
corporation  shall have power to purchase  and  maintain  insurance on behalf of
directors,  officers,  employees, and agents of the Corporation,  and of persons
who serve other enterprises in such or similar  capacities at the request of the
Corporation, against any liability asserted against them and incurred by them in
such  capacities,  whether  or not the  Corporation  would  have  the  power  to
indemnify them against such liability  under the General  Corporation Law of the
State of  Delaware  and any other laws of the State of  Delaware  in effect from
time to time.



                                       22
<PAGE>

                                   ARTICLE XI
                                   ----------

                           AMENDMENTS TO THESE BY-LAWS
                           ---------------------------

     Section 11.1. BY THE STOCKHOLDERS.

     These  By-laws  may be  amended  or  repealed  in  whole or in part and new
By-laws  may be adopted by the  affirmative  vote of a majority of the shares of
common  stock  present  in  person  or  represented  by  proxy at a  meeting  of
stockholders  at which a quorum is present  and  entitled to vote on the subject
matter,  provided  that notice  thereof is stated in the  written  notice of the
meeting.

     Section 11.2. BY THE BOARD OF DIRECTORS.

     These  By-laws  may be  amended  or  repealed  in  whole or in part and new
By-laws may be adopted by  unanimous  written  consent of the  directors  on the
Board of Directors  without meeting or by the affirmative  vote of a majority of
the  directors  present at a meeting of the Board of Directors at which a quorum
is present,  provided  that  notice  thereof be  contained  in the notice of the
meeting.

                                   ARTICLE XII
                                   -----------

                 AMENDMENTS TO THE CERTIFICATE OF INCORPORATION
                 ----------------------------------------------

     Section 12.1. BY THE STOCKHOLDERS.

     Any  amendment  to the  Certificate  of  Incorporation  shall  require  the
affirmative vote of a majority of the aggregate number of shares of common stock
issued and outstanding  and entitled to vote on the subject  matter,  present in
person or  represented  by proxy at a meeting  of  stockholders,  provided  that
notice thereof is stated in the written notice of the meeting.  If any amendment
to the  Certificate  of  Incorporation  would increase or decrease the aggregate
number of authorized shares of any class,  increase or decrease the par value of
shares of any class, or alter, change,  qualify,  limit, or restrict the powers,
preferences, or rights of shares of any class so



                                       23
<PAGE>

as to affect them  adversely,  such amendment  shall require,  in addition,  the
affirmative  vote of a majority of the  aggregate  number of shares of each such
class issued and outstanding and entitled to vote on the subject matter, present
in person or  represented by proxy at a meeting of  stockholders,  provided that
notice thereof is stated in the written notice of the meeting.






                                                                     Exhibit 4.1


              CREDIT SUISSE FIRST BOSTON MORTGAGE SECURITIES CORP.,

                                   Depositor,

                         [----------------------------],

                              Seller and Servicer,

                                       and

                         [----------------------------],

                                     Trustee

                                     FORM OF

                         POOLING AND SERVICING AGREEMENT

                          Dated as of [_________], 200_

                                   relating to

                         [----------------------------]
           MORTGAGE-BACKED PASS-THROUGH CERTIFICATES, SERIES 200_-___

<PAGE>

                             TABLE OF CONTENTS

                                                                        Page

ARTICLE I    DEFINITIONS...................................................3

ARTICLE II   CONVEYANCE OF TRUST FUND; REPRESENTATIONS AND WARRANTIES.....27

      SECTION 2.01  Conveyance of Trust Fund..............................27

      SECTION 2.02  Acceptance by Trustee.................................29

      SECTION 2.03  Representations, Warranties and  Covenants of
                    the Servicer and  Seller..............................30

      SECTION 2.04  Representations, Warranties and Covenants of the
                    Servicer and the Seller with respect to the
                    Mortgage Loans........................................31

      SECTION 2.05  Issuance of Certificates..............................39

      SECTION 2.06  REMIC Provisions......................................39

ARTICLE III  ADMINISTRATION AND SERVICING OF MORTGAGE LOANS...............44

      SECTION 3.01  Servicing Standard....................................44

      SECTION 3.02  Enforcement of the Obligations of Sub-Servicers.......45

      SECTION 3.03  Termination of the Rights of Sub-Servicers............46

      SECTION 3.04  Liability of the Servicer.............................46

      SECTION 3.05  Rights of the Depositor and the Trustee in Respect
                    of the Servicer.......................................47

      SECTION 3.06 Trustee to Act as Servicer...........................47

      SECTION 3.07 Collection of Mortgage Loan Payments.................47

      SECTION 3.08 Collection of Taxes, Assessments and Similar Items;
                   Escrow Accounts......................................49

      SECTION 3.09 Permitted Withdrawals from the Custodial Account.....50

      SECTION 3.10 Maintenance of Primary Mortgage Insurance Policies;
                   Collections Thereunder...............................51

      SECTION 3.11 Maintenance of Hazard Insurance and Other Insurance. 52

      SECTION 3.12 Enforcement of Due-On-Sale Clauses; Assumption
                   Agreements...........................................53

      SECTION 3.13 Realization Upon Defaulted Mortgage Loans............55

      SECTION 3.14 Trustee to Cooperate; Release of Trustee Mortgage
                   Files................................................56

      SECTION 3.15 Documents, Records and Funds in Possession of Servicer
                   to be Held for the Depositor and the Trustee for the
                   Benefit of the Certificateholders....................57

      SECTION 3.16 Servicing Compensation...............................57

      SECTION 3.17 Reports to the Depositor; Account Statements.........58

      SECTION 3.18 Annual Statement as to Compliance....................58

      SECTION 3.19 Annual Independent Public Accountants' Servicing
                   Report...............................................58

      SECTION 3.20 Reports to Trustee...................................59

      SECTION 3.21 Converted Mortgage Loans; Certain Procedures and
                   Purchases............................................59

ARTICLE IV   PAYMENTS AND STATEMENTS TO CERTIFICATEHOLDERS..............61

      SECTION 4.01 Certificate Account..................................61

      SECTION 4.02 Distributions........................................61

      SECTION 4.03 Allocation of Realized Losses........................63

      SECTION 4.04 Monthly Statements to Certificateholders.............64

      SECTION 4.05 Prepayment Interest Shortfalls and Relief Act
                   Shortfalls...........................................65

      SECTION 4.06 The Policy...........................................65

ARTICLE V    ADVANCES...................................................67

      SECTION 5.01 Monthly Advances by the Servicer.....................67

      SECTION 5.02 Advances for Attorneys' Fees.........................67

      SECTION 5.03 Nonrecoverable Advances..............................68

      SECTION 5.04 Advance Procedures...................................68

ARTICLE VI   THE CERTIFICATES...........................................69

      SECTION 6.01 The Certificates.....................................69

      SECTION 6.02 Registration of Transfer and Exchange of
                   Certificates.........................................69

      SECTION 6.03 Mutilated, Destroyed, Lost or Stolen Certificates....74

      SECTION 6.04 Persons Deemed Owners................................75

      SECTION 6.05 Access to List of Certificateholders' Names
                   and Addresses........................................75

      SECTION 6.06 Maintenance of Office or Agency......................75

      SECTION 6.07 Book-Entry Certificates..............................75

      SECTION 6.08 Notices to Clearing Agency...........................76

      SECTION 6.09 Definitive Certificates..............................76

ARTICLE VII  THE DEPOSITOR AND THE SERVICER.............................78

      SECTION 7.01 Liabilities of the Depositor and the Servicer........78

      SECTION 7.02 Merger or Consolidation of the Depositor or the
                   Servicer.............................................78

      SECTION 7.03 Limitation on Liability of the Depositor,
                   the Servicer and Others..............................79

      SECTION 7.04 Servicer Not to Resign...............................79

      SECTION 7.05 Errors and Omissions Insurance; Fidelity Bonds.......80

      SECTION 7.06 Servicer May Own Certificates........................80

ARTICLE VIII DEFAULT....................................................81

      SECTION 8.01 Events of Default....................................81

      SECTION 8.02 Trustee to Act; Appointment of Successor.............82
 .
      SECTION 8.03 Notification to Certificateholders...................84

      SECTION 8.04 Waiver of Events of Default..........................84

ARTICLE IX   CONCERNING THE TRUSTEE.....................................85

      SECTION 9.01 Duties of Trustee....................................85

      SECTION 9.02 Certain Matters Affecting the Trustee................86

      SECTION 9.03 Trustee Not Liable for Certificates or Mortgage
                   Loans................................................88

      SECTION 9.04 Trustee May Own Certificates.........................88

      SECTION 9.05 Trustee's Fees and Expenses..........................88

      SECTION 9.06 Eligibility Requirements for Trustee.................88

      SECTION 9.07 Resignation and Removal of Trustee...................89

      SECTION 9.08 Successor Trustee....................................89

      SECTION 9.09 Merger or Consolidation of Trustee...................90

      SECTION 9.10 Appointment of Co-Trustee or Separate Trustee........90

      SECTION 9.11 Office of the Trustee................................91

      SECTION 9.12 Tax Returns..........................................91

ARTICLE X    TERMINATION................................................92

      SECTION 10.01 Termination upon Liquidation or Repurchase
                    of all Mortgage Loans...............................92

      SECTION 10.02 Procedure Upon Optional Termination.................92

      SECTION 10.03 Additional Termination Requirements.................93

ARTICLE XI   MISCELLANEOUS PROVISIONS...................................95

      SECTION 11.01 Amendment...........................................95

      SECTION 11.02 Recordation of Agreement; Counterparts..............96

      SECTION 11.03 Governing Law.......................................96

      SECTION 11.04 Intention of Parties................................96

      SECTION 11.05 Notices.............................................98

      SECTION 11.06 Severability of Provisions..........................98

      SECTION 11.07 Limitation on Rights of Certificateholders..........98

      SECTION 11.08 Certificates Nonassessable and Fully Paid...........99

      SECTION 11.09 Rights of the Insurer...............................99




<PAGE>

                                    EXHIBITS

Exhibit  A:    Form of Class A Certificate                         A-1
Exhibit  B:    Form of Class S Certificate                         B-1
Exhibit  C:    Form of Class R Certificate                         C-1
Exhibit  D:    Schedule of Mortgage Loans                          D-1
Exhibit  E:    Form of Initial Certification of Trustee            E-1
Exhibit  F:    Form of Final Certification of Trustee              F-1
Exhibit  G:    Form of Request for Release                         G-1
Exhibit  H:    Form of Investor Representation Letter              H-1
Exhibit  I:    Form of Transferor Representation Letter            I-1
Exhibit  J:    Form of Investor Transfer Affidavit and Agreement   J-1
Exhibit  K:    Form of Transfer Certificate                        K-1
Exhibit  L:    Certificate Guaranty Insurance Policy               L-1


<PAGE>

           THIS  POOLING AND  SERVICING  AGREEMENT,  dated as of  [___________],
200_,  is hereby  executed by and between  CREDIT  SUISSE FIRST BOSTON  MORTGAGE
SECURITIES CORP.,  depositor (the  "Depositor"),  [____________________________]
("[_______]"),  in its capacity as seller (the  "Seller") and in its capacity as
servicer (the "Servicer") and [____________________________], a national banking
association,  as  trustee  (the  "Trustee").  Capitalized  terms  used  in  this
Agreement and not otherwise  defined will have the meanings  assigned to them in
Article I below.

                              PRELIMINARY STATEMENT

           The  Depositor  is the  owner of the  Mortgage  Loans  and the  other
property  being  conveyed by it to the Trustee in its capacity as trustee of the
Trust Fund,  in  accordance  with this  Agreement,  and the  Depositor  has duly
authorized  the  execution  and  delivery of this  Agreement  to provide for the
conveyance to the Trustee of the Trust Fund. As provided  herein,  the Depositor
will make an  election  to treat the assets  consisting  of  Mortgage  Loans and
certain other assets as described  herein as a real estate  mortgage  investment
conduit (a "REMIC") for federal income tax purposes and such pool of assets will
be designated as "REMIC I". The Class R-I  Certificates  will represent the sole
class of "residual  interests"  in REMIC I for purposes of the REMIC  Provisions
(as  defined   herein)  under  federal  income  tax  law.  The  following  table
irrevocably sets forth the designation, the REMIC I Remittance Rate, the initial
Uncertificated   Balance,   and  solely  for  purposes  of  satisfying  Treasury
regulation Section 1.860G-1(a)(4)(iii),  the "latest possible maturity date" for
each of the REMIC I  Regular  Interests.  None of the REMIC I Regular  Interests
will be certificated.

                             REMIC I INITIAL LATEST

   DESIGNATION        REMITTANCE     UNCERTIFICATED      POSSIBLE
       DATE              RATE            BALANCE        MATURITY(1)

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

(1) Solely  for  purposes  of  Section   1.860G-1(a)(4)(iii)   of  the  Treasury
    regulations,  the Distribution Date immediately  following the maturity date
    for the Mortgage Loan with the latest  maturity date has been  designated as
    the "latest possible maturity date" for each REMIC I Regular Interest.

(2)  Calculated in accordance  with the definition of "REMIC I Remittance  Rate"
     herein.

           As provided herein,  the Depositor will elect to treat the segregated
pool of  assets  consisting  of the  REMIC I  Regular  Interests  as a REMIC for
federal  income  tax  purposes,  and  such  segregated  pool of  assets  will be
designated  as REMIC II. The Class R-II  Certificates  will  represent  the sole
class of "residual  interests" in REMIC II for purposes of the REMIC  Provisions
under federal  income tax law. The following  table  irrevocably  sets forth the
designation,  Certificate Rate, aggregate Initial Certificate  Principal Balance
and  Maturity  Date

                                       1
<PAGE>

for each Class of Certificates  comprising the interests  representing  "regular
interests"  in REMIC II (the  "REMIC  II  Regular  Certificates").  The  "latest
possible maturity date" (determined  solely for purposes of satisfying  Treasury
Regulation  Section  1.860G-1(a)(4)(iii))  for each  Class  of REMIC II  Regular
Certificates  shall be the first  Distribution  Date  that  follows  the  stated
maturity date for the Mortgage Loan included in the Trust Fund as of the Closing
Date with the longest remaining term to stated maturity.

                                             AGGREGATE
                                              INITIAL
                                            CERTIFICATE
                             CERTIFICATE    PRINCIPAL        MATURITY
 DESIGNATION        TYPE        RATE         BALANCES        DATE
- - - - - - - - -------------------------------------------------------------------------------
Class A           Senior

Class S         Subordinate

- - - - - - - - ---------------
* As set forth in the definition of "Certificate Rate" herein.

           All covenants and agreements made by the Depositor herein are for the
benefit and security of the Certificateholders  [and the Insurer]. The Depositor
is entering into this Agreement, and the Trustee is accepting the trusts created
hereby  and  thereby,  for good and  valuable  consideration,  the  receipt  and
sufficiency  of which are  hereby  acknowledged.  The  principal  balance of the
Mortgage Loans as of the Cut-off Date is $[__________].

           The parties  hereto intend to effect an absolute sale and  assignment
of the Mortgage Loans to the Trustee for the benefit of Certificateholders  [and
the Insurer]  under the Mortgage  Loan Purchase  Agreement  and this  Agreement.
However,  the Seller will hereunder  absolutely  assign and, as a  precautionary
matter grant a security interest,  in and to its rights, if any, in the Mortgage
Loans to the Trustee on behalf of Certificateholders [and the Insurer] to ensure
that the  interest  of the  Insurer  hereunder  in the  Mortgage  Loans is fully
protected.

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

           In  consideration  of the mutual  agreements  herein  contained,  the
Depositor, the Servicer, the Seller and the Trustee agree as follows:

                                       2
<PAGE>

                                   ARTICLE I

                                   DEFINITIONS

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

     ADJUSTMENT  DATE:  As to each  Mortgage  Loan,  each  date set forth in the
related  Mortgage  Note on  which an  adjustment  to the  interest  rate on such
Mortgage Loan becomes effective.

     ADVERSE REMIC EVENT: As defined in Section 2.06(f).

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

     APPRAISED VALUE:  The appraised value of the Mortgaged  Property based upon
the  appraisal  made for the  originator at the time of the  origination  of the
related  Mortgage Loan or the sales price of the Mortgaged  Property at the time
of such  origination,  whichever is less,  or with respect to any Mortgage  Loan
that  represents a refinancing,  the lower of the appraised value at origination
or the appraised  value of the Mortgaged  Property based upon the appraisal made
at the time of such refinancing.

     AVAILABLE  DISTRIBUTION  AMOUNT: With respect to any Distribution Date, the
excess of (a) the sum of (i) the  aggregate  amount of payments and  collections
received  by the  Servicer in respect of each  Mortgage  Loan on or prior to the
related  Determination  Date  and not  previously  remitted,  from  any  source,
including  amounts  received  from the related  Mortgagor,  Insurance  Proceeds,
Liquidation  Proceeds (net of related  Liquidation  Expenses)  and  condemnation
awards,  and amounts  received in  connection  with the purchase of any Mortgage
Loans by the Seller or Servicer and the  substitution  of  Replacement  Mortgage
Loans,  and excluding  interest and other  earnings on amounts on deposit in the
Custodial  Account and the  Certificate  Account,  (ii) the aggregate  amount of
Monthly  Advances  required  to be  remitted  by the  Servicer  relating to such
Distribution  Date and (iii) Insured  Payments  payable  pursuant to the Policy;
over (b) the sum of (i) the aggregate amount of the servicing compensation to be
paid  to  the  Servicer  pursuant  to  the  terms  hereof  (including,   without
limitation, Servicing Fees, prepayment penalties, fees or premiums, late payment
charges  and  assumption  fees and any excess  interest  charges  payable by the
Mortgagor by virtue of any default or other non-compliance by the Mortgagor with
the terms of the Mortgage Loan or any other  instrument or document  executed in
connection   therewith  or  otherwise),   (ii)  any  amount   included   therein
representing  late  payments  or  other  recoveries  of  principal  or  interest
(including  Liquidation  Proceeds  (net  of  Liquidation  Expenses),   Insurance
Proceeds and condemnation  awards) with respect to any Mortgage Loans in respect
of which the Servicer has made a previously  unreimbursed Monthly Advance to the
extent of such Monthly  Advance,  (iii) amounts  included  therein  representing
reimbursement  of  Nonrecoverable  Advances  and other  amounts  permitted to be
withdrawn  from the  Custodial  Account  or the  Certificate  Account,  (iv) all
Monthly Payments or portions thereof (other than Principal Prepayments and other
unscheduled collections of principal) received in respect of scheduled principal
and interest on any Mortgage Loan due after

                                       3
<PAGE>

the  related  Due Period  and  included  therein,  (v) all  payments  due on any
Mortgage  Loan on or prior to the Cut-off  Date and  included  therein,  (vi) an
amount equal to the Principal Balance of each Mortgage Loan immediately prior to
such  Distribution Date multiplied by one-twelfth of the Trustee Fee Rate, (vii)
Principal  Prepayments and other unscheduled  collections of principal  received
after the  related  Prepayment  Period  and  included  therein  and  (viii)  the
Certificate Insurer Premium payable as of such Distribution Date.

     BANKRUPTCY CODE: The United States Bankruptcy Code, as amended from time to
time (11 U.S.C.).

     BENEFICIAL   HOLDER:  A  Person  holding  a  beneficial   interest  in  any
Certificate through a Participant or an Indirect Participant or a Person holding
a beneficial interest in any Definitive Certificate, as defined in Section 6.07.

     BOOK-ENTRY  CERTIFICATES:  Certificates evidencing a beneficial interest in
the Trust Fund,  ownership  and  transfers  of which shall be made  through book
entries, as described in Section 6.07.

     BUSINESS DAY: Any day other than (i) a Saturday or a Sunday,  or (ii) a day
on which the Insurer or banking  institutions  in New York or the state in which
the  Servicer  or the  Corporate  Trust  Office are located  are  authorized  or
obligated by law or executive order to be closed.

     CERTIFICATE:  Any Class A, [Class S] or Class R  Certificate  executed  and
authenticated  by the  Trustee  for the  benefit  of the  Certificateholders  in
substantially the form or forms attached as Exhibits hereto.

     CERTIFICATE   ACCOUNT:   The  separate  account  or  accounts  created  and
maintained  by the Trustee  pursuant to Section 4.01, in the name of the Trustee
for the  benefit of the  Certificateholders  [and the  Insurer]  for  deposit of
payments and  collections  in respect of the Mortgage  Loans pursuant to Section
4.01 hereof, which account or accounts must be an Eligible Account or Accounts.

     CERTIFICATE  PRINCIPAL BALANCE: On any date and with respect to the Class A
Certificates,  the Initial Certificate  Principal Balance of such Class less the
sum of (i) all  amounts  previously  distributed  to  Holders of such Class with
respect to  principal  pursuant to Section 4.02 and (ii) all amounts of Realized
Losses  previously  allocated to such Class pursuant to Section 4.03,  unless an
Insured  Payment in respect of such  amount has been paid by the  Insurer and is
included in clause (i) above.

     CERTIFICATE  RATE: In the case of the Class A Certificates a per annum rate
equal to the weighted  average,  expressed as a percentage,  of the Net Mortgage
Rates of the Mortgage Loans,  weighted on the basis of the respective  Principal
Balances  of such  Mortgage  Loans  at the  close  of  business  on the Due Date
immediately   preceding   the  related  Due  Period  after   giving   effect  to
distributions on such date allocable to principal.  [With respect to the Class S
Certificates and any Distribution Date, a rate per annum equal to the sum of the
following components:

                                       4
<PAGE>

           (A) the REMIC I Remittance  Rate for REMIC I Regular  Interest [____]
      minus two (2) times the weighted  average of the REMIC I Remittance  Rates
      for REMIC I Regular  Interest  [____]  and  [____]  applied  to a notional
      amount equal to the Uncertificated Balance of [____].

           (B) the REMIC I Remittance  Rate for REMIC I Regular  Interest [____]
      minus two (2) times the weighted  average of the REMIC I Remittance  Rates
      for REMIC I Regular  Interests  [____]  and  [____]  applied to a notional
      amount equal to the Uncertificated Balance of [____].

           (C) the REMIC I Remittance  Rate for REMIC I Regular  Interest [____]
      minus four (4) times the weighted  average of the REMIC I Remittance Rates
      for REMIC I Regular  Interests  [____]  and  [____]  applied to a notional
      amount equal to the Uncertificated Balance of [____].]

Interest on the  Certificates  will be  computed on the basis of a 360-day  year
comprised of twelve 30-day months.

     CERTIFICATE  REGISTER:  The register maintained pursuant to Section 6.02(a)
hereof.

     CERTIFICATEHOLDER  or HOLDER:  The Person in whose  name a  Certificate  is
registered in the Certificate Register.

     CLASS:  Each  of the  Class  A,  [Class  S] or  Class  R  Certificates,  as
appropriate.

     CLASS A  CERTIFICATE:  A  Certificate  executed  and  authenticated  by the
Trustee in  substantially  the form set forth in EXHIBIT A hereto and designated
as a Class A Certificate  and  evidencing  ownership of interests  designated as
"regular interests" in REMIC II for purposes of the REMIC Provisions.

     CLASS A CUMULATIVE  INTEREST SHORTFALL AMOUNT: On any Distribution Date, an
amount equal to (i) any portion of a Class A Interest  Distribution  Amount that
was not  distributed to the Holders of the Class A Certificates on any preceding
Distribution  Date less (ii) any amount  described  in clause (i) hereof that is
included in a Realized Loss that has been  allocated to the Class A Certificates
on or prior to such Distribution Date.

     CLASS  A  INTEREST  DISTRIBUTION  AMOUNT:  On any  Distribution  Date,  (a)
one-twelfth of the product of (i) the Certificate Principal Balance of the Class
A  Certificates  immediately  prior  to such  Distribution  Date  and  (ii)  the
applicable  Certificate  Rate,  minus (b) the Insurer  Premium and the aggregate
amount of Prepayment Interest Shortfalls and Relief Act Shortfalls  allocated to
such Certificates pursuant to Section 4.05 on such Distribution Date.

     CLASS A PRINCIPAL  DISTRIBUTION  AMOUNT:  (a) On any Distribution Date, the
sum of (i) the  principal due on the related Due Date for each Mortgage Loan and
received  during  the  related  Due  Period or with  respect  to which a Monthly
Advance was made with respect to the related Due Period,  (ii) for each Mortgage
Loan that was prepaid during the related  Prepayment  Period,  the amount of the
Principal Prepayment  including,  with respect to any Mortgage Loan that was the
subject of a Debt Service Reduction in any prior Prepayment  Period,  the amount
of



                                       5
<PAGE>

any such  Principal  Prepayment  that  exceeds  the  Principal  Balance  of such
Mortgage Loan as of the date of the  prepayment,  (iii) for each  Mortgage/ Loan
that was  purchased  by the Seller or  Servicer  during the  related  Prepayment
Period pursuant to Section 2.01,  2.02,  2.04,  3.12, 3.21 or 10.01 hereof,  the
principal amount of the Purchase Price (net of any amounts with respect to which
a  distribution  of  principal  has  already  been  made) and the  amount of any
shortfall deposited in the Custodial Account in connection with the substitution
of a Deleted  Mortgage Loan pursuant to Section 2.01, 2.02 or 2.04 hereof during
the  related  Prepayment  Period,  (iv) the  aggregate  amount of the  principal
portion of Liquidation  Proceeds and the principal portion of Insurance Proceeds
received  with respect to such Mortgage  Loan net of any  withdrawals  permitted
hereunder to be made by the Servicer from the Custodial  Account with respect to
such Mortgage  Loan,  (v) for each Mortgage Loan with respect to which any other
unscheduled   recovery  of  principal  has  been  received  during  the  related
Prepayment Period, the amount of such unscheduled  recovery,  (vi) the amount of
any related  Overcollateralization  Increase Amount for such Distribution  Date,
and (vii) the  payment  of any  Overcollateralization  Deficit  pursuant  to the
Policy; MINUS (viii) the amount of any related  Overcollateralization  Reduction
Amount for such  Distribution  Date and (b) on the Scheduled Final  Distribution
Date, the outstanding Certificate Principal Balance of the Class A Certificates.

     CLASS R CERTIFICATE: Any one of the Class R-I or Class R-II Certificates.

     CLASS R-I  CERTIFICATE:  A Certificate  executed and  authenticated  by the
Trustee in  substantially  the form set forth in Exhibit C and  designated  as a
Class R-I  Certificate  and  evidencing  an interest  designated  as a "residual
interest" in REMIC I for purposes of the REMIC Provisions.

     CLASS R-II  CERTIFICATE:  A Certificate  executed and  authenticated by the
Trustee in  substantially  the form set forth in Exhibit C and  designated  as a
Class R-II  Certificate  and  evidencing  an interest  designated as a "residual
interest" in REMIC II for purposes of the REMIC Provisions.

     CLASS S  CERTIFICATE:  A  Certificate  executed  and  authenticated  by the
Trustee in  substantially  the form set forth in Exhibit C hereto and designated
as a Class S Certificate  and  evidencing  ownership of interests  designated as
"regular interests" in REMIC II for purposes of the REMIC Provisions.

     CLASS S CUMULATIVE  INTEREST SHORTFALL AMOUNT: On any Distribution Date, an
amount equal to (i) any portion of a Class S Interest  Distribution  Amount that
was not  distributed to the Holders of the Class S Certificates on any preceding
Distribution  Date less (ii) any amount  described  in clause (i) hereof that is
included in a Realized Loss that has been  allocated to the Class S Certificates
on or prior to such Distribution Date.

     CLASS S INTEREST  DISTRIBUTION  AMOUNT:  On any Distribution  Date, (a) the
aggregate  of the product of (i) the  Principal  Balance of each  Mortgage  Loan
immediately  after the Distribution  Date preceding such  Distribution Date (or,
with respect to the first  Distribution  Date,  immediately prior to the Closing
Date) and (ii)  one-twelfth  of 0.70%,  plus (b) the  product of (i) the Class S
Cumulative Interest Shortfall Amount and (ii) the Certificate Rate for the Class
A  Certificates  (the sum of (a) and (b) being equal to the sum, for each of the
components of the

                                       6
<PAGE>

Certificate Rate with respect to the Class S Certificates of the product of such
Certificate  Rate  and  the  applicable  notional  amount  as  specified  in the
definition of Certificate  Rate),  minus (c) the aggregate  amount of Prepayment
Interest  Shortfalls  and  Relief  Act  Shortfalls  allocated  to  the  Class  S
Certificates pursuant to Section 4.05 on such Distribution Date.

     CLEARING AGENCY: An organization registered as a "clearing agency" pursuant
to  Section  17A of the  Securities  Exchange  Act of 1934,  as  amended,  which
initially shall be DTC.

     CODE: The Internal Revenue Code of 1986, as amended.


     CONVERTIBLE  MORTGAGE  LOAN: Any Mortgage Loan which by its terms grants to
the  related  Mortgagor  the option to convert the  interest  rate borne by such
Mortgage Loan from an adjustable interest rate to a fixed interest rate.

     CONVERTING  MORTGAGE  LOAN: Any  Convertible  Mortgage Loan with respect to
which the related  Mortgagor  has given  notice of its intent to convert from an
adjustable interest rate to a fixed interest rate and prior to the conversion of
such Convertible Mortgage Loan.

     CORPORATE TRUST OFFICE:  The designated  office of the Trustee in the State
of  -------------  Minnesota at which at any particular time its corporate trust
business  shall be  administered,  which office at the date of the  execution of
this Agreement is located at [-------------------------].

     CUMULATIVE  INSURANCE  PAYMENTS:  As of  any  time  of  determination,  the
aggregate  amount of all Insured  Payments  previously made by the Insurer under
the Policy plus any unpaid Insurer Premium,  plus interest thereon from the date
such amounts  became due until paid in full, at a rate of interest  equal to the
Late  Payment  Rate and in  accordance  with  Section  3.03(a) of the  Insurance
Agreement, minus the sum of the aggregate of all payments previously made to the
Insurer pursuant to Section 4.02 hereof as reimbursement for such amounts.

     CUSTODIAL  ACCOUNT:  The deposit account or accounts created and maintained
by the  Servicer  pursuant to Section  3.07  hereof in the name of a  depository
institution which may be the Servicer for the benefit of the  Certificateholders
[and the Insurer], which account or accounts must be Eligible Accounts.

     CUT-OFF DATE: [_________ 1, 200_].

     DEBT SERVICE  REDUCTION:  With respect to any Mortgage Loan, a reduction in
the  scheduled  Monthly  Payment for such  Mortgage Loan by a court of competent
jurisdiction in a proceeding under the Bankruptcy Code,  except such a reduction
constituting a Deficient  Valuation or any reduction that results in a permanent
forgiveness of principal.

     DEFICIENCY  AMOUNT:  With  respect  to the Class A  Certificates  as of any
Distribution  Date,  the sum of (i) any shortfall in the Available  Distribution
Amount to pay the  interest  portion of a  Realized  Loss,  net of any  interest
shortfalls  relating  to any  Prepayment  Interest  Shortfalls  and  Relief  Act
Shortfalls    allocated   to   the   Class   A   Certificates   and   (ii)   the
Overcollateralization Deficit.

                                       7
<PAGE>

     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 that results in a
permanent forgiveness of principal,  which valuation in either case results from
a proceeding under the Bankruptcy Code.

     DELETED  MORTGAGE  LOAN:  A Mortgage  Loan  replaced or to be replaced by a
Replacement Mortgage Loan.

     DELINQUENCY AMOUNT: As of any Distribution Date, the product of the Rolling
Three Month Delinquency  Percentage and the aggregate  Principal Balances of the
Mortgage  Loans as of the close of  business  on the last day of the related Due
Period immediately preceding such Distribution Date.

     DELINQUENCY  PERCENTAGE:   With  respect  to  any  Distribution  Date,  the
percentage  equivalent  of a  fraction  (a) the  numerator  of which  equals the
aggregate  Principal  Balances  of all  Mortgage  Loans that are 90 or more days
delinquent,  in  foreclosure  or converted to REO  Properties as of the close of
business on the last day of the related  Due Period and (b) the  denominator  of
which is the aggregate  Principal  Balance of the Mortgage Loans as of the close
of business on the last day of such Due Period.

     DELIVERY DATE: [_________ 1, 200_].

     DEPOSITOR: Credit Suisse First Boston Mortgage Securities Corp., a Delaware
corporation, or its successor in interest.

     DEPOSITORY  AGREEMENT:  The Letter of Representation dated as of [_________
1,  200_] by and among DTC, the Depositor and the Trustee.

     DETERMINATION  DATE:  The [___] day (or if such 15th day is not a  Business
Day, the Business Day immediately  preceding such [___] day) of the month of the
related Distribution Date.

     DISQUALIFIED  ORGANIZATION:  Any  organization  defined as a  "disqualified
organization"  under Section  860E(e)(5) of the Code,  which includes any of the
following:  (i) the United States, any State or political  subdivision  thereof,
any possession of the United States, or any agency or  instrumentality of any of
the foregoing  (other than an  instrumentality  which is a corporation if all of
its activities  are subject to tax and,  except for the FHLMC, a majority of its
board of directors is not selected by such  governmental  unit),  (ii) a foreign
government, any international organization,  or any agency or instrumentality of
any of the  foregoing,  (iii) any  organization  (other  than  certain  farmers'
cooperatives  described in Section 521 of the Code) which is exempt from the tax
imposed by Chapter 1 of the Code  (including  the tax  imposed by Section 511 of
the  Code on  unrelated  business  taxable  income),  (iv)  rural  electric  and
telephone  cooperatives  described in Section  1381(a)(2)(C) of the Code and (v)
any other Person so  designated  by the Trustee based upon an Opinion of Counsel
that the holding of an Ownership  Interest in a Class R-I  Certificate  or Class
R-II Certificate by such Person may cause the related REMIC or any Person having
an Ownership  Interest in any Class of Certificates  (other than such Person) to
incur a liability  for any  federal  tax  imposed  under the Code that would not
otherwise be imposed but for the  Transfer of an  Ownership  Interest in a Class
R-I  Certificate  or Class R-II


                                       8
<PAGE>

Certificate   to  such  Person.   The  terms   "United   States",   "State"  and
"international  organization"  shall have the meanings set forth in Section 7701
of the Code or successor provisions.

     DISTRIBUTION  DATE: The [___] day of each calendar  month, or if such [___]
day  is not a  Business  Day,  the  next  succeeding  Business  Day,  commencing
[_________, 200_].

     DTC: The Depository Trust Company.

     DUE  DATE:  The  first  day of the  calendar  month  in which  the  related
Distribution  Date occurs.

     DUE PERIOD:  The period from and  including  the second day of the calendar
month preceding the calendar month in which any Distribution  Date occurs to and
including the first day of the calendar  month in which such  Distribution  Date
occurs.

     ELIGIBLE  ACCOUNT:  Either  (i) an account or  accounts  maintained  with a
federal or state-chartered depository institution or trust company (which may be
the  Servicer or an  affiliate of the Servicer or which may be the Trustee or an
affiliate of the Trustee) 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  short-term  unsecured  debt
obligations  of such holding  company) are rated by each Rating Agency not lower
than P-1 in the case of Moody's and A-1+ in the case of Standard & Poor's,  (ii)
an account or  accounts  the  deposits  in which are fully  insured by the FDIC,
provided  that any such  deposits not so insured  shall be otherwise  maintained
such that (as  evidenced  by an Opinion of Counsel  delivered to the Trustee and
the Rating Agencies) the applicable 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 Eligible Investments) securing
such funds that is superior to claims of any other  depositors  or  creditors of
the  depository  institution  or  trust  company  with  which  such  account  is
maintained,  (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, provided that any such state chartered
depository  institution  is subject  to  regulation  regarding  funds on deposit
substantially  similar to the regulations  set forth in 12 C.F.R. ` 9.10(b),  or
(iv) any account maintained at any Federal Home Loan Bank.

     ELIGIBLE  INVESTMENTS:  At any  time,  any  one or  more  of the  following
obligations, instruments and securities:

           (i) obligations of the United States or any agency thereof,  provided
      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  rating of Moody's and Standard & Poor's,  or such lower ratings
      as are acceptable to the Insurer and will not result in the downgrading or
      withdrawal  of  the  rating,   if  any,  then  assigned  to  the  Class  A
      Certificates by each applicable Rating Agency;

           (iii)commercial  paper (having  original  maturities of not more than
      270 days)  which is then  rated in the  highest  commercial  paper  rating
      category of Moody's and

                                       9
<PAGE>

Standard & Poor's,  or such lower  category as is  acceptable to the Insurer and
will not result in the  downgrading or withdrawal of the rating then assigned to
the Class A Certificates by each applicable Rating Agency;

     (iv)  certificates  of deposit,  demand or time deposits,  federal funds or
bankers'  acceptances (in each case having maturities of not more than 365 days)
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  debt   obligations  of  such  depository
institution  or trust  company (or in the case of a  depository  institution  or
trust  company  that is the  principal  subsidiary  of a  holding  company,  the
commercial paper or long-term debt obligations of such holding company) are then
rated in the highest  rating  category of Moody's and Standard & Poor's,  in the
case of commercial  paper,  and in the highest category in the case of long-term
debt  obligations,  or such lower categories as is acceptable to the Insurer and
will not result in the  downgrading or withdrawal of the rating then assigned to
the Class A Certificates by each applicable  Rating Agency,  and, in the case of
short-term debt  obligations  which have maturities of 30 days or less, a rating
of P-1 by Moody's, and a rating of A-1+ by Standard & Poor's;

     (v) demand or time deposits or  certificates  of deposit  issued by (a) any
Federal Home Loan Bank or (b) any bank or trust  company or savings  association
which is rated at least "A" by  Standard & Poor's  which has  combined  capital,
surplus and undistributed profits of not less than $50 million and fully insured
by the FDIC;

     (vi) repurchase  obligations with respect to any security  described in (i)
and (ii)  above or any  other  security  issued  or  guaranteed  by an agency or
instrumentality  of the  United  States,  in  either  case  entered  into with a
depository  institution or trust company (acting as principal) described in (iv)
above;

     (vii)securities  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  or  contractual  commitment
providing for such  investments are then rated in the highest rating category of
Moody's  and  Standard & Poor's or in such  lower  rating  category  as will not
result in the downgrading or withdrawal of the rating,  if any, then assigned to
the Class A Certificates by each applicable Rating Agency;

     (viii) such other  investments  which are  acceptable to the Insurer and do
not adversely  affect the rating,  if any, on the Class A  Certificates  by each
applicable Rating Agency; and

     (ix) units of taxable  money-market  portfolios rated in the highest rating
category  by Moody's and  Standard & Poor's and not  restricted  to  obligations
issued or  guaranteed by any agency or  instrumentality  of the United States or
entities whose obligations are backed by the full faith and credit of the United
States and repurchase agreements collateralized by such obligations.

                                       10
<PAGE>

PROVIDED  that (A) such  obligation  or security is held for a temporary  period
pursuant  to  Treasury  Regulations  Section  1.860G-2(g)(1),  and (B)  Eligible
Investments  shall include only such obligations or securities that mature on or
before the (i) Business Day  immediately  preceding the next  Distribution  Date
with  respect to amounts on  deposit  in the  Certificate  Account  and (ii) the
second  Business  Day  immediately  preceding  the next  Distribution  Date with
respect to amounts on deposit in the Custodial Account. In addition, no Eligible
Investment which incorporates a penalty for early withdrawal will be used unless
the  maturity  of such  Eligible  Investment  is on or before the  Business  Day
immediately preceding the next Distribution Date.

     ESCROW ACCOUNT: As defined in Section 3.08.

     EVENT OF DEFAULT: As defined in Section 8.01 hereof.

     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 DISTRIBUTION DATE: The Distribution Date on which the final
distribution  in respect of the  Certificates  will be made  pursuant to Section
10.01,  which Final Distribution Date shall in no event be later than the end of
the 90-day liquidation period described in Section 10.03.

     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.

     [INDEX:  With respect to any Mortgage  Loan and as to any  Adjustment  Date
therefor,  a per annum rate equal to the weekly  average yield on U.S.  Treasury
securities  adjusted  to a  constant  maturity  of one year as  reported  by the
Federal  Reserve  Board in  statistical  Release  No.  H.15(519)  as of the date
specified in the related  Mortgage  Note, or, in the event that such index is no
longer available, an index selected by the Servicer and reasonably acceptable to
the Trustee that is based on comparable information.]

     INDIRECT PARTICIPANTS:  Entities, such as banks, brokers, dealers and trust
companies,  that clear  through  or  maintain a  custodial  relationship  with a
Participant, either directly or indirectly.

     INITIAL  CERTIFICATE  PRINCIPAL  BALANCE:  With  respect  to  the  Class  A
Certificates,  $[_______________].

     [INSURANCE ACCOUNT: The account or accounts created and maintained pursuant
to  Section  4.06,  which  shall  be  entitled  "[________________________],  as
trustee,   in   trust   for  the   registered   holders   of   [______________],
Mortgage-Backed Pass-Through Certificates,  Series 200_-___, Class A," and which
must be an Eligible Account.

                                       11
<PAGE>

     [INSURANCE  AGREEMENT:  The Insurance  Agreement  dated as of  [__________,
200_]  among  the  Insurer,  the  Trustee,  the  Servicer,  the  Seller  and the
Depositor.]

     INSURANCE PROCEEDS: Amounts paid pursuant to any insurance policy
with  respect to a Mortgage  Loan that have not been used to restore the related
property.

     INSURED  PAYMENT:  With  respect  to the  Class A  Certificates,  as of any
Distribution Date, the Deficiency Amount, if any, for such Distribution Date.

     [INSURER: [___________________] or its successors in interest.]

     INSURER DEFAULT: The existence and continuance of any of the following: (a)
a  failure  by the  Insurer  to make a  payment  required  under  the  Policy in
accordance  with its terms;  or (b)(i) the  Insurer  (A) files any  petition  or
commences  any  case  or  proceeding  under  any  provision  or  chapter  of the
Bankruptcy  Code  or  any  other  similar  federal  or  state  law  relating  to
insolvency, bankruptcy, rehabilitation, liquidation or reorganization, (B) makes
a general  assignment for the benefit of its creditors,  or (C) has an order for
relief entered against it under the Bankruptcy Code or any other similar federal
or state law relating to insolvency, bankruptcy, rehabilitation,  liquidation or
reorganization  which is final and  nonappealable;  or (ii) a court of competent
jurisdiction, the New York Department of Insurance or other competent regulatory
authority  enters a final  and  nonappealable  order,  judgment  or  decree  (A)
appointing a custodian, trustee, agent or receiver for the Insurer or for all or
any material portion of its property or (B) authorizing the taking of possession
by a  custodian,  trustee,  agent or  receiver  of the Insurer (or the taking of
possession of all or any material portion of the property of the Insurer).

     INSURER PREMIUM:  With respect to any Distribution Date, an amount equal to
one-twelfth  of the  product  of the  Insurer  Premium  Rate  and the  aggregate
Certificate  Principal Balance of the Class A Certificates  immediately prior to
such Distribution Date.

     INSURER  PREMIUM  RATE:  The rate set  forth  in the  Insurance  Agreement.

     LATE PAYMENT RATE: As defined in the Insurance Agreement.

     LIQUIDATED LOAN: With respect to any Distribution Date, a Mortgage
Loan which,  as of the close of business on the Business Day next  preceding the
related  Determination  Date,  (a) has been  liquidated  through deed in lieu of
foreclosure,  sale in  foreclosure,  trustee's  sale  or  other  realization  as
provided by applicable law of real property  subject to the related Mortgage and
any security  agreements  or (b) with  respect to which  payment  under  related
private  mortgage  insurance  or  hazard  insurance  and/or  from any  public or
governmental  authority  on  account  of a taking  or  condemnation  of any such
property has been received;  PROVIDED,  HOWEVER, that any REO Property shall not
be treated as a Liquidated Loan until such property has been finally liquidated.

     LIQUIDATION  EXPENSES:  Customary and reasonable  "out of pocket"  expenses
incurred by the Servicer (or the related  Sub-Servicer)  in connection  with the
liquidation of any defaulted Mortgage Loan and not recovered by the Servicer (or
the related  Sub-Servicer) under a Primary Mortgage Insurance Policy for reasons
other than the  Servicer's  failure to comply with  Section  3.10  hereof,  such
expenses   including,   without  limitation,   legal  fees  and  expenses,   any


                                       12
<PAGE>

unreimbursed  amount  expended by the  Servicer  pursuant to Section 3.11 hereof
respecting the related  Mortgage and any related and  unreimbursed  expenditures
for real estate  property taxes or for property  restoration or  preservation to
the extent not  previously  reimbursed  under any  hazard  insurance  policy for
reasons other than the Servicer's failure to comply with Section 3.11 hereof.

     LIQUIDATION  PROCEEDS:  Amounts other than Insurance  Proceeds  received in
connection  with the liquidation of a defaulted  Mortgage Loan,  whether through
trustee's sale,  foreclosure sale or otherwise or amounts received in connection
with any condemnation or partial release of a Mortgaged Property.

     LOAN-TO-VALUE  RATIO:  As  of  any  date,  the  fraction,  expressed  as  a
percentage,  the  numerator  of which is the  Principal  Balance of the  related
Mortgage Loan at the date of  determination  and the denominator of which is the
Appraised  Value of the  Mortgaged  Property  or,  in the case of a  Replacement
Mortgage  Loan, is the appraised  value of the Mortgaged  Property based upon an
appraisal  made  within  180  days  prior to the  date of  substitution  of such
Replacement Mortgage Loan for a Deleted Mortgage Loan.

     MARGIN:  As to each Mortgage  Loan,  the fixed  percentage set forth in the
related Mortgage Note, which percentage is added to the Index on each Adjustment
Date to determine  (subject to rounding in accordance with the related  Mortgage
Note, the applicable  Periodic Cap,  Maximum  Interest Rate and Minimum Interest
Rate)  the  interest  rate to be  borne by such  Mortgage  Loan  until  the next
Adjustment Date thereof.

     MATURITY DATE: The latest  possible  maturity date,  solely for purposes of
Section   1.860G-1(a)(4)(iii)   of  the  Treasury  regulations,   by  which  the
Certificate  Principal  Balance,  if any, of each Class of Regular  Certificates
would be reduced  to zero as  determined  under a  hypothetical  scenario  which
assumes  that such date is the  Distribution  Date in the month of the  maturity
date of the Mortgage Loan with the latest scheduled  maturity date. The Maturity
Date for each Class of Regular Certificates is [___________, 20__].

     MAXIMUM  INTEREST RATE: As to any Mortgage Loan, the maximum  interest rate
that may be borne by such  Mortgage  Loan as set forth in the  related  Mortgage
Note,  which rate may be applicable to such Mortgage Loan at any time during the
life of such Mortgage Loan.

     MINIMUM  INTEREST RATE: As to any Mortgage Loan, the minimum  interest rate
that may be borne by such  Mortgage  Loan as set forth in the  related  Mortgage
Note,  which rate may be applicable to such Mortgage Loan at any time during the
life of such Mortgage Loan.

     MONTHLY ADVANCE:  The aggregate of the advances made by or on behalf of the
Servicer with respect to any Distribution  Date pursuant to Section 5.01 hereof,
the amount of any such advances being equal to the regular monthly  installments
of principal and interest on the Mortgage Loans that were due on the related Due
Date and  delinquent  as of the close of business  on the related  Determination
Date,  after  adjustment  of any  delinquent  interest  payment  to be  equal to
interest at a rate equal to the Mortgage Rate less the Servicing Fee Rate on the
Principal  Balance of the Mortgage Loans,  less the aggregate amount of any such
delinquent  payments  that  the  Servicer  has  determined  would  constitute  a
Nonrecoverable Advance if made.

                                       13
<PAGE>

     MONTHLY PAYMENT: The scheduled monthly payment of principal and interest on
a Mortgage Loan.

     MOODY'S: Moody's Investors Service or any successor thereto.

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

     MORTGAGE FILE:  For each Mortgage  Loan, the Trustee  Mortgage File and the
Servicer Mortgage File.

     MORTGAGE LOAN:  Each 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,  evidenced by a Mortgage Note and secured by a Mortgage,
the mortgage loans so held being  identified in the Mortgage Loan  Schedule,  as
amended from time to time.

     MORTGAGE LOAN  PURCHASE  AGREEMENT:  The Mortgage  Loan Purchase  Agreement
dated as of  [____________,  200_]  between the  Depositor,  Credit Suisse First
Boston Corporation and the Seller, pursuant to which the Depositor purchased the
Mortgage Loans from the Seller.

     MORTGAGE  LOAN  REPURCHASE  PRICE:  The price,  calculated  as set forth in
Section  10.01,  to be paid in  connection  with the  repurchase of the Mortgage
Loans pursuant to an Optional Termination of the Trust Fund.

     MORTGAGE  LOAN  SCHEDULE:  The list of Mortgage  Loans  transferred  to the
Trustee  as part of the Trust  Fund for the  Certificates  and from time to time
subject  to this  Agreement  (as from time to time  amended by the  Servicer  to
reflect the addition of  Replacement  Mortgage Loans and the deletion of Deleted
Mortgage Loans pursuant to the provisions of this Agreement), attached hereto as
EXHIBIT D, setting forth the following information with respect to each Mortgage
Loan:

          (i) the loan number;

         (ii) the city, state and zip code for each Mortgaged Property;

        (iii) the Index or the Mortgage Rate;

        [(iv) the Margin;

          (v) the Maximum Interest Rate;

         (vi) the Minimum Interest Rate;

        (vii) the original term to maturity;

       (viii) the remaining term to maturity;]

         (ix) the original principal balance;

                                       14
<PAGE>

          (x) the Principal Balance as of the Cut-off Date;

         (xi) the first Due Date;

        (xii) the Monthly Payment in effect as of the Cut-off Date;

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

        (xiv) the Appraised Value of the Mortgaged Property;

        [(xv) the Net Mortgage Rate;]

        (xvi) a code indicating  whether the Mortgaged  Property is either (a) a
detached single-family dwelling or a de minimis planned unit development,  (b) a
condominium unit or a dwelling in a planned unit  development,  or (c) a two- to
four-family residential property;

     (xvii) a code  indicating  whether  the  Mortgaged  Property at the time of
origination was represented to be owner-occupied; and

      (xviii) the purpose for which the financing was made.

Such schedule shall also set forth the total of the amounts described under (ix)
above for all of the Mortgage  Loans.  Such  schedule may be in the form of more
than one list  collectively  setting forth all of the  information  required and
shall also be in a  computer-readable  format acceptable to the Trustee [and the
Insurer].

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

     MORTGAGE RATE: The annual rate of interest borne by a Mortgage Note,  which
is set forth in the related  Mortgage Note. [The Mortgage Rate for each Mortgage
Loan as of the Cut-off Date will be adjusted on each  Adjustment  Date to a rate
equal to the sum of the Index applicable to such Adjustment Date and the Margin,
rounded to or up to the nearest multiple of [____]%, as specified in the related
Mortgage  Note,  subject to the  application  of the  applicable  Periodic  Cap,
Maximum Interest Rate and Minimum Interest Rate.]

     MORTGAGED  PROPERTY:  The  underlying  property  securing a Mortgage  Loan.

     MORTGAGOR: The obligor on a Mortgage Note.

     NET  MORTGAGE  RATE:  As  to  each  Mortgage  Loan,  with  respect  to  any
Distribution  Date, a rate per annum equal to (a) the Mortgage Rate in effect as
of the Due Date in the preceding calendar month minus (b) the Servicing Fee Rate
minus (c) the Trustee Fee Rate minus (d) [___]% per annum.

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

     NONRECOVERABLE  ADVANCE: The portion of any Monthly Advance previously made
or proposed to be made by the Servicer or other advance  previously  made by the
Servicer that,



                                       15
<PAGE>

in the good  faith  judgment  of the  Servicer,  will  not or,  in the case of a
current delinquency,  would not be, ultimately  recoverable by the Servicer from
Insurance  Proceeds or Liquidation  Proceeds (net of Liquidation  Expenses) with
respect to the related Mortgage Loan.

     OFFICERS'  CERTIFICATE:  A certificate signed by the Chairman of the Board,
any Vice Chairman of the Board,  the  President,  an Executive  Vice  President,
Senior Vice President, a Vice President, or other authorized officer, and by the
Treasurer,  the  Secretary,  or one of the  Assistant  Treasurers  or  Assistant
Secretaries of the Depositor,  the Seller,  the Servicer,  a Sub-Servicer or the
Trustee,  as the case may be, and delivered to the Insurer,  the Depositor,  the
Servicer or the Trustee, as required by this Agreement.

     OPINION OF COUNSEL:  A written  opinion of counsel,  who may be counsel for
the  Depositor or the  Servicer,  reasonably  acceptable to the Trustee [and the
Insurer].  With respect to the definition of Eligible  Account in this Article I
and Sections 2.04 and 7.04 hereof and any opinion dealing with the qualification
of a REMIC or  compliance  with 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 of them 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  purchase  of the  Mortgage  Loans  pursuant to
Section  10.01.

     OPTIONAL  TERMINATION DATE: The date fixed by the Servicer for the purchase
of  the Mortgage Loans pursuant to Section 10.01.

     ORIGINAL OVERCOLLATERALIZATION AMOUNT: $[__________].

     OVERCOLLATERALIZATION  AMOUNT: As of any Distribution  Date, the excess, if
any, of (a) the aggregate  Principal  Balances of the Mortgage Loans immediately
following such Distribution  Date over (b) the Certificate  Principal Balance of
the Class A Certificates as of such Distribution Date (after taking into account
the  payment  of  the  amounts  described  in  clauses  (i)  through  (v) of the
definition of Class A Principal Distribution Amount on such Distribution Date).

     OVERCOLLATERALIZATION  DEFICIENCY AMOUNT:  With respect to any Distribution
Date,  the excess,  if any, of (a) the  Specified  Overcollateralization  Amount
applicable to such Distribution Date over (b) the related  Overcollateralization
Amount  applicable  to such  Distribution  Date prior to taking into account the
payment  of  any  related   Overcollateralization   Increase   Amounts  on  such
Distribution Date.

     OVERCOLLATERALIZATION  DEFICIT:  With respect to any Distribution Date, the
excess of (x) the aggregate  outstanding  Class A Certificate  Principal Balance
(after giving effect to all distributions to be made on such Distribution  Date)
as of such  Distribution  Date  over  (y) the  aggregate  outstanding  Principal
Balance of the Mortgage Loans as of the close of business on the last day of the
related  Due  Period  (after  giving  effect to all  distributions  during  such
period).

                                       16
<PAGE>

     OVERCOLLATERALIZATION  INCREASE  AMOUNT:  With respect to any  Distribution
Date, the lesser of (a) the  Overcollateralization  Deficiency Amount as of such
Distribution  Date (after taking into account the payment of the related Class A
Principal  Distribution  Amount  on such  Distribution  Date  (exclusive  of the
payment of any related Overcollateralization Increase Amount)) and (b) the Class
S Interest Distribution Amount with respect to such Distribution Date as reduced
by (i) the interest portion of any Realized Losses and (ii) Cumulative Insurance
Payments for such Distribution Date.

     OVERCOLLATERALIZATION  REDUCTION  AMOUNT:  With respect to any Distribution
Date,  an amount  equal to the  lesser  of (a) the  excess,  if any,  of (x) the
related   Overcollateralization   Amount   that  would  exist   following   such
Distribution   Date   following   payment  of  the  related  Class  A  Principal
Distribution  Amount  (exclusive of any reductions  thereto  attributable to the
related  Overcollateralization  Reduction Amount) over (y) the related Specified
Overcollateralization  Amount for such  Distribution Date and (b) the sum of the
amounts  for  such  Distribution  Date  specified  in  clauses  (i)-(v)  of  the
definition of Class A Principal Distribution Amount.

     PARTICIPANT:  A broker,  dealer, bank, other financial institution or other
Person for whom DTC  effects  book-entry  transfers  and  pledges of  securities
deposited with DTC.

     PASS-THROUGH  ENTITY:  (a) a  regulated  investment  company  described  in
Section 851 of the Code, a real estate investment trust described in Section 856
of the Code, a common trust fund or an organization described in Section 1381(a)
of the Code,  (b) any  partnership,  trust or estate or (c) any person holding a
Class A Certificate as nominee for another person.

     PERCENTAGE  INTEREST:  The percentage interest (which may be expressed as a
fraction)  evidenced  by any  Certificate,  which (a) in the case of the Class A
Certificates,  is equal to a  fraction,  the  numerator  of which is the Initial
Certificate Principal Balance of such Certificate,  and the denominator of which
is  equal  to  the  aggregate  Initial  Certificate  Principal  Balances  of all
Certificates  of the same  Class  and (b) in the case of the  Class S or Class R
Certificates, is set forth on the face thereof.

     [PERIODIC CAP: With respect to each Mortgage Loan, the maximum  increase or
decrease in the Mortgage Rate on any Adjustment Date (other than with respect to
certain of the  Mortgage  Loans,  the first  Adjustment  Date for such  Mortgage
Loan), as specified in the related Mortgage Note.]

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

     [POLICY:  The Certificate  Guaranty Insurance Policy No. [______] issued by
the Insurer in respect of the Class A Certificates,  a copy of which is attached
hereto as Exhibit L.]

     PREPAYMENT INTEREST SHORTFALL: As to any Distribution Date and any Mortgage
Loan  (other  than a  Mortgage  Loan  secured by an REO  Property)  that was the
subject of a Principal  Prepayment  during the  related  Prepayment  Period,  an
amount equal to the excess of one month's  interest at the Mortgage  Rate on the
Principal Balance of such Mortgage Loan over



                                       17
<PAGE>

the amount of interest paid by the Mortgagor for such  Prepayment  Period to the
date of such Principal Prepayment.

     PREPAYMENT  PERIOD:  With respect to any  Distribution  Date,  the calendar
month prior to the month in which  such  Distribution  Date occurs.

     PRIMARY MORTGAGE INSURANCE POLICY: Each primary policy of mortgage guaranty
insurance with respect to the Mortgage Loans or any replacement policy therefor.

     PRINCIPAL BALANCE: With respect to any Mortgage Loan, as of the date of any
determination,  the principal balance of such Mortgage Loan remaining to be paid
by the  Mortgagor as of the Cut-off Date after  deduction of all payments due on
or before the Cut-off  Date,  reduced (but not below zero) by the sum of (i) all
amounts previously received or collected by the Servicer in respect of principal
of such  Mortgage  Loan  subsequent  to the  Cut-off  Date,  other than  amounts
representing payments due on such Mortgage Loan on or prior to the Cut-off Date;
(ii) all  Liquidation  Proceeds  (net of  Liquidation  Expenses)  and  Insurance
Proceeds allocated to principal; (iii) all amounts allocable to the principal of
such Mortgage Loan previously paid by the Servicer as part of a Monthly Advance,
in each case which were  distributed to  Certificateholders  pursuant to Section
4.02; and (iv) all Realized Losses allocated to Certificateholders  with respect
thereto on any previous Distribution Date. In the case of a Replacement Mortgage
Loan,  "Principal  Balance"  shall mean, at the time of any  determination,  the
principal balance of such Replacement  Mortgage Loan on the date of substitution
after  deduction  of all  payments due on or before the Due Date in the month of
substitution,  reduced by the sums described in (i) through (iv),  above,  after
such Due Date.

     PRINCIPAL PREPAYMENT:  Any Mortgagor payment or other recovery of principal
on a Mortgage  Loan that is received in advance of its scheduled Due Date and is
not accompanied by an amount as to interest representing  scheduled interest due
on any  date or  dates  in any  month  or  months  subsequent  to the  month  of
prepayment.

     PURCHASE PRICE:  With respect to any Mortgage Loan required to be purchased
by the Seller or Servicer  pursuant to Section 2.01, 2.02, 2.04 or 3.12 or which
the  Servicer  purchases  pursuant  to  Section  3.21 the sum of (i) 100% of the
Principal  Balance  of the  Mortgage  Loan on the  date of such  purchase,  (ii)
accrued and unpaid  interest on the Mortgage  Loan at a rate equal to the sum of
the Net Mortgage  Rate, the Trustee Fee Rate and 0.70% per annum to the next Due
Date and  (iii)  the  amount  of any  unreimbursed  Monthly  Advances  and other
advances   made  by  the  Servicer  with  respect  to  such  Mortgage  Loan  and
reimbursable  to the  Servicer  hereunder.  With  respect to any  Mortgage  Loan
required or allowed to be  purchased,  the  Servicer or Seller,  as  applicable,
shall deliver to the Trustee an Officers'  Certificate as to the  calculation of
the Purchase Price.

           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 other state having  jurisdiction  over such insurer in connection  with
the insurance policy issued by such insurer, duly authorized and licensed by the
insurance  regulatory  authority of the state of its principal place of business
and,  to the extent  required  by  applicable  law,  each such other  state,  to
transact  a mortgage  guaranty  insurance  business  in such state and each such
other state and to write the

                                       18
<PAGE>

insurance  provided  by the  insurance  policy  issued by it and  approved as an
insurer  by FHLMC or FNMA and whose  claims-paying  ability  will not  adversely
affect the rating on the Certificates.

     RATING AGENCY: Moody's and Standard & Poor's or any successor thereto.

     REALIZED  LOSS:  An amount  determined  by the Servicer and evidenced by an
Officers'  Certificate delivered to the Trustee, in connection with any Mortgage
Loan  equal to (a) with  respect  to any  Liquidated  Loan,  the  excess  of the
Principal  Balance of such Liquidated Loan plus interest thereon at a rate equal
to the sum of the applicable Net Mortgage Rate and the Trustee Fee Rate from the
Due Date as to which  interest was last paid up to the Due Date next  succeeding
such  liquidation  over  proceeds,  if any,  received  in  connection  with such
liquidation,  after  application of all withdrawals  permitted to be made by the
Servicer from the related  Custodial Account with respect to such Mortgage Loan,
(b) with  respect  to any  Mortgage  Loan  which has  become  the  subject  of a
Deficient  Valuation,  the excess of the Principal  Balance of the Mortgage Loan
over the  principal  amount  as  reduced  in  connection  with  the  proceedings
resulting in the  Deficient  Valuation or (c) with respect to any Mortgage  Loan
which has become the subject of a Debt Service  Reduction,  the present value of
all monthly Debt Service  Reductions  on such Mortgage  Loan,  assuming that the
Mortgagor  pays each  Monthly  Payment  on the  applicable  Due Date and that no
Principal   Prepayments  are  received  with  respect  to  such  Mortgage  Loan,
discounted monthly at the applicable Mortgage Rate.

     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  the
applicable Distribution Date occurs.

     REGULAR  CERTIFICATES:  All of the  Certificates  other  than  the  Class R
Certificates.

     RELIEF  ACT:  The  Soldiers'  and  Sailors'  Civil  Relief Act of 1940,  as
amended.

     RELIEF  ACT  SHORTFALLS:  With  respect  to any  Distribution  Date and any
Mortgage  Loan,  the amount of any  interest  that is not  collectible  from the
Mortgagor  during the related  Due Period  pursuant to the Relief Act or similar
legislation or regulations as in effect from time to time.

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

     REMIC  ELECTION:  An election,  for federal  income tax purposes,  to treat
certain assets as a REMIC.

     REMIC I: The corpus of the trust  created by this  Agreement  consisting of
(a) the Mortgage  Loans  listed in the Mortgage  Loan  Schedule,  including  all
interest  and  principal  received or  receivable  by the  Depositor  on or with
respect to the Mortgage Loans after the Cut-off Date, but not including payments
of principal and interest due and payable on the Mortgage Loans on or before the
Cut-off Date,  together with the Mortgage Files relating to the Mortgage  Loans,
(b) REO Property,  (c) the Custodial Account and the Certificate Account and all
amounts  deposited  therein  pursuant  to  the  applicable  provisions  of  this


                                       19
<PAGE>

Agreement, (d) any insurance policies with respect to the Mortgage Loans and (e)
all  proceeds  of  the  conversion,  voluntary  or  involuntary,  of  any of the
foregoing into cash or other liquid property.

     REMIC I REALIZED LOSSES: For any Distribution Date,  Realized Losses on the
Mortgage Loans for the prior  calendar month shall be allocated as follows:  The
interest  portion of  Realized  Losses,  if any,  shall be  allocated  among the
classes of REMIC I  Certificates  pro-rata  according to the  interest  accruing
thereon at the REMIC I Remittance  Rate  thereon to the extent of such  interest
accruing  thereon  at the REMIC I  Remittance  Rate in  reduction  thereof.  Any
interest  Realized  Losses in excess of the  amount  allocated  pursuant  to the
preceding   sentence  shall  be  treated  as  principal   Realized   Losses  not
attributable  to any  specific  Mortgage  Loan  and  allocated  pursuant  to the
succeeding  sentences.  The principal  Realized Losses shall be allocated (i) to
the Class  [____],  Class  [____],  Class [____] and Class  [____]  Certificates
pro-rata according to their respective  principal  balances,  provided that such
allocation  to  each  of  the  Class  [____],  Class  [____]  and  Class  [____]
Certificates shall not exceed their respective Class [____] Principal  Reduction
Amounts for such Distribution  Date, and (ii) any principal  Realized Losses not
allocated to either the Class [____], Class [____], or Class [____] Certificates
pursuant to the  proviso of clause (i) shall be  allocated  to the Class  [____]
Certificates.

     REMIC  I  REGULAR  INTEREST:  Any of  the  four  separate  non-certificated
beneficial  ownership  interests in REMIC I issued hereunder and designated as a
"regular  interest"  in REMIC I. Each  REMIC I  Regular  Interest  shall  accrue
interest at the related REMIC I Remittance Rate in effect from time to time, and
shall be  entitled  to  distributions  of  principal,  subject  to the terms and
conditions  hereof,  in an aggregate amount equal to its initial  Uncertificated
Balance as set forth in the preliminary  statement hereto.  The designations for
the  respective  REMIC I  Regular  Interests  are set  forth in the  Preliminary
Statement hereto.

     REMIC I REMITTANCE  RATE: With respect to REMIC I Regular  Interests [____]
and [____],  the weighted  average of Net Mortgage Rates on the then outstanding
Mortgage Loans and REO Properties, plus 0.70% per annum. With respect to REMIC I
Regular Interest [____],  zero. With respect to REMIC I Regular Interest [____],
twice  the  weighted  average  of Net  Mortgage  Rates on the  then  outstanding
Mortgage Loans and REO Properties, plus 1.40% per annum.

     REMIC II: The  segregated  pool of assets  consisting of all of the REMIC I
Regular  Interests,  with  respect to which a separate  REMIC  election is to be
made.

     REMIC II  REGULAR  INTEREST:  Any of the Class A  Certificates  and Class S
Certificates.  The Class A  Certificates  shall  accrue  interest at the related
Certificate  Rate in effect from time to time,  minus the Insurer  Premium Rate,
and shall be entitled to  distributions  of principal,  subject to the terms and
conditions  hereof,  in an aggregate  amount equal to their initial  Certificate
Principal Balance as set forth in the preliminary  statement hereto. The Class S
Certificates  shall accrue interest at the related  Certificate  Rate, and shall
not be entitled to any distributions of principal.

     REMIC  PROVISIONS:  Provisions  of the federal  income tax law  relating to
REMICs, which appear at Section 860A through 860G of the Subchapter M of


                                       20
<PAGE>

Chapter  1 of the Code  and  related  provisions,  and  regulations  promulgated
thereunder, as the foregoing may be in effect from time to time.

     REO  PROPERTY:  Any  Mortgaged  Property  acquired by or in the name of the
Trustee  for  the  benefit  of  the  Certificateholders  [and  the  Insurer]  in
foreclosure or by deed-in-lieu of foreclosure.

     REPLACEMENT  MORTGAGE LOAN: A Mortgage Loan  substituted by the Servicer or
Seller for a Deleted Mortgage Loan which must, on the date of such substitution,
as confirmed in an Officers'  Certificate  delivered to the Trustee, (i) have an
outstanding  Principal Balance,  after deduction of the principal portion of the
Monthly  Payment  due  in the  month  of  substitution  (or  in  the  case  of a
substitution  of more than one Mortgage  Loan for a Deleted  Mortgage  Loan,  an
aggregate  Principal  Balance,  after  such  deduction),  not in  excess  of the
Principal Balance of the Deleted Mortgage Loan (the amount of any shortage to be
deposited  by the  Servicer  or Seller,  as the case may be, in the  Certificate
Account  in the  month of  substitution  as set  forth in  Section  2.03 of this
Agreement);  (ii) at the time of substitution  have a Net Mortgage Rate equal to
or exceeding the Net Mortgage Rate of the Deleted  Mortgage  Loan;  (iii) have a
Loan-to-Value  Ratio no  higher  than  the  Loan-to-Value  Ratio of the  Deleted
Mortgage  Loan;  (iv) have a remaining term to maturity no greater than (and not
more than one year less than) the Deleted  Mortgage  Loan; (v) be of the same or
better credit quality  classification  as that of the Deleted Mortgage Loan; and
(vi) comply with each representation and warranty relating to the Mortgage Loans
set forth in Section 2.04 hereof.

     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
in respect of such  Mortgage  Loan,  including  each  standard  hazard  and,  if
applicable, flood insurance policy.

     RESPONSIBLE OFFICER: When used with respect to the Trustee, the Chairman or
Vice  Chairman  of the Board of  Directors  or  Trustees,  the  Chairman or Vice
Chairman of the  Executive  or Standing  Committee  of the Board of Directors or
Trustees,  the President,  the Chairman of the Committee on Trust  Matters,  any
Vice  President,  any Assistant Vice  President,  the  Secretary,  any Assistant
Secretary,  the Treasurer,  any Assistant Treasurer,  the Cashier, any Assistant
Cashier,  any Trust Officer or Assistant  Trust Officer,  the Controller and any
Assistant Controller or any other officer of the Trustee customarily  performing
functions similar to those performed by any of the above designated officers and
also, with respect to a particular matter, any other officer to whom such matter
is referred  because of such  officer's  knowledge of and  familiarity  with the
particular subject.

     ROLLING THREE-MONTH  DELINQUENCY  PERCENTAGE:  As of any Distribution Date,
the fraction, expressed as a percentage, equal to the average of the Delinquency
Percentage  for each of the  three  (or one and two in the case of the first and
second Distribution Dates) immediately preceding Due Periods.

     RULE 144A: Rule 144A under the 1933 Act, as in effect from time to time.

     SCHEDULED FINAL DISTRIBUTION DATE: [__________, 20__].

     SELLER: [_______________________] or its successor in interest.

                                       21
<PAGE>

     SERVICER:  [_______________________]  or any  successor  under the terms of
this Agreement.

     SERVICER ADVANCE DATE: The date on which the Servicer is required to make a
 Monthly Advance pursuant to Section 5.04 hereof.

     SERVICER  MORTGAGE  FILE:  All documents  pertaining to a Mortgage Loan not
required to be included in the Trustee Mortgage File and held by the Servicer or
any Sub-Servicer.

     SERVICING  FEE: For each calendar  month,  as to each Mortgage Loan, (i) an
amount equal to one month's interest (or in the event of any payment of interest
which accompanies a Principal Prepayment in full made by the Mortgagor, interest
for the number of days covered by such  payment of  interest) at the  applicable
Servicing  Fee Rate on the Principal  Balance of such Mortgage Loan  immediately
preceding the  Distribution  Date  occurring in such month and (ii) increased by
any late payment  charges,  assumption  fees and other usual and customary  fees
collected from the Mortgagor and by any net income on Eligible  Investments held
in the Custodial Account.

     SERVICING FEE RATE: [____]% per annum.

     SERVICING OFFICER:  Any officer of the Servicer involved in, or responsible
for, the  administration  and servicing of the Mortgage Loans whose name appears
on a list of  servicing  officers  furnished to the Trustee [and the Insurer] on
the Delivery Date by the Servicer  pursuant to this Agreement,  as such list may
from time to time be amended.

     STANDARD & POOR'S:  Standard & Poor's Ratings  Services,  a division of the
 McGraw-Hill Companies, or its successor in interest.

     SUB-SERVICER:  Any other entity with respect to any Mortgage Loan under any
Sub-Servicing  Agreement applicable to such Mortgage Loan and any successors and
assigns under such Sub-Servicing Agreement.

     SUB-SERVICING AGREEMENT: Any servicing agreement between the Servicer and a
Sub-Servicer  pursuant  to which the  Servicer  delegates  any of its  servicing
responsibilities with respect to any of the Mortgage Loans.

     TRANSFEREE  AFFIDAVIT AND AGREEMENT:  As defined in Section  6.02(g)(i)(B).

     TRUST FUND: Collectively, the assets of REMIC I and REMIC II.

     TRUSTEE:  U.S. Bank National  Association,  a national banking association,
not in its  individual  capacity,  but solely in its capacity as trustee for the
benefit of the  Certificateholders  [and the Insurer] under this Agreement,  and
any successor thereto, as provided herein.

     TRUSTEE FEE: The fee payable to the Trustee on each  Distribution  Date for
its  services as Trustee  hereunder,  in an amount equal to  one-twelfth  of the
Trustee Fee Rate

                                       22
<PAGE>

multiplied by the Principal  Balance of the Mortgage Loans  immediately prior to
such Distribution Date.

     TRUSTEE FEE RATE: [____]% per annum.

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

     UNCERTIFICATED  BALANCE:  The  amount  of  any  REMIC  I  Regular  Interest
outstanding  as of any  date  of  determination.  As of the  Closing  Date,  the
Uncertificated  Balance of each REMIC I Regular  Interest shall equal the amount
set forth in the  Preliminary  Statement  hereto as its  initial  Uncertificated
Balance.  On each Distribution Date, the Uncertificated  Balance of each REMIC I
Regular Interest shall be reduced by all distributions of principal made on such
REMIC I Regular Interest on such Distribution Date pursuant to Section 4.02 and,
if, and to the extent,  necessary and  appropriate,  shall be further reduced on
such  Distribution  Date by Realized  Losses as provided  in Section  4.05.  The
Uncertificated Balance of each REMIC I Regular Interest shall never be less than
zero.

     UNCERTIFICATED  INTEREST:  With respect to any REMIC I Regular Interest for
any  Distribution  Date,  one month's  interest at the REMIC I  Remittance  Rate
applicable to such REMIC I Regular Interest for such Distribution  Date, accrued
on the  Uncertificated  Balance thereof  immediately  prior to such Distribution
Date. Uncertificated Interest in respect of any REMIC I Regular Interest [____],
[____],  [____] or [____] shall accrue on the basis of a 360-day year consisting
of  twelve  30-day  months.   Uncertificated   Interest  with  respect  to  each
Distribution  Date, as to any REMIC I Regular Interest,  shall be reduced by any
interest  shortfalls  with respect to the Mortgage  Loans to time.  In addition,
Uncertificated  Interest with respect to each Distribution Date, as to any REMIC
I Regular  Interest shall be reduced by the interest  portion of Realized Losses
allocable to such REMIC I Regular Interest,  if any, pursuant to Section 4.05(b)
hereof.

     U.S.  PERSON:  A citizen or resident of the United  States,  a corporation,
partnership  or other entity  created or organized in, or under the laws of, the
United States or any political  subdivision thereof, or an estate or trust whose
income from sources  without the United States is includable in gross income for
United States federal income tax purposes  regardless of its connection with the
conduct of a trade or business within the United States.

     VOTING  RIGHTS:  The  portion  of the  aggregate  voting  rights of all the
Certificates  evidenced by a  Certificate.  [___]% of all Voting  Rights will be
allocated  to the  Class A  Certificates  in  proportion  to  their  Certificate
Principal Balances, [__]% of all Voting Rights will be allocated among the Class
S Certificates in proportion to their  Percentage  Interests and [__]% and [__]%
of all  Voting  Rights  will  be  allocated  to the  Class  R-I and  Class  R-II
Certificates, respectively.

                                       23
<PAGE>



                                   ARTICLE II


                            CONVEYANCE OF TRUST FUND;
                         REPRESENTATIONS AND WARRANTIES

SECTION 2.01 CONVEYANCE OF TRUST FUND.

           The Depositor hereby sells, transfers,  assigns,  delivers, sets over
and otherwise  conveys to the Trustee for the benefit of the  Certificateholders
[[and the Insurer]], without recourse, the Depositor's right, title and interest
in and to (a) the Mortgage Loans listed in the Mortgage Loan Schedule, including
all interest and  principal  received or  receivable by the Depositor on or with
respect to the Mortgage Loans after the Cut-off Date, but not including payments
of principal and interest due and payable on the Mortgage Loans on or before the
Cut-off Date,  which Mortgage Loans the Depositor shall cause to be delivered to
the Trustee on or prior to the Delivery Date, together with the Trustee Mortgage
Files  relating to the  Mortgage  Loans,  (b) REO  Property,  (c) the  Custodial
Account,  the Certificate  Account and all amounts deposited therein pursuant to
the  applicable  provisions of this  Agreement,  (d) any  insurance  policy with
respect to the Mortgage Loans and (e) all proceeds of the conversion,  voluntary
or involuntary, of any of the foregoing into cash or other liquid property.

           The Seller hereby sells, transfers,  assigns, delivers, sets over and
otherwise   conveys  to  the   Trustee  for  the  benefit  of  the  Insurer  and
Certificateholders,  without recourse,  any and all right, title and interest of
the Seller, if any, in and to (a) the Mortgage Loans listed in the Mortgage Loan
Schedule,  including  all interest and  principal  received or receivable by the
Seller on or with respect to the Mortgage  Loans after the Cut-off Date, but not
including  payments of  principal  and  interest due and payable on the Mortgage
Loans on or  before  the  Cut-off  Date,  (b) REO  Property,  (c) the  Custodial
Account,  the Certificate  Account and all amounts deposited therein pursuant to
the  applicable  provisions of this  Agreement,  (d) any  insurance  policy with
respect to the Mortgage Loans and (e) all proceeds of the conversion,  voluntary
or involuntary, of any of the foregoing into cash or other liquid property.

           In connection  with any such transfer and  assignment,  the Depositor
shall  deliver to, and deposit  with,  the Trustee the  following  documents  or
instruments with respect to each Mortgage Loan so assigned:

(i)  the Mortgage Note,  endorsed  without recourse to the order of the Trustee,
     with all intervening  endorsements  showing a complete chain of endorsement
     from the  originator  to the last  endorser,  and if the  Mortgage  Note or
     Mortgage  or any other  material  document  or  instrument  relating to the
     Mortgage Loan has been signed on behalf of the Mortgagor by another person,
     the original  power of attorney or other  instrument  that  authorized  and
     empowered  such person to sign, or a copy of the original power of attorney
     or other  instrument  certified by the relevant public  recording office in
     those instances in which the public recording office retains the original;

(ii) the original Mortgage, and any intervening assignment thereof, in each case
     as recorded, with evidence of recording indicated thereon;

                                       24
<PAGE>


(iii) an original  assignment  or  assignments  of Mortgage  showing an unbroken
      chain of title  from  the  originator  to the  preceding  assignee  to the
      Trustee with evidence of recording indicated thereon; and

(iv)  the original copy of each assumption,  modification,  written assurance or
      substitution  agreement,  if any, with respect to such  Mortgage  Loan, as
      identified on the Mortgage Loan Schedule.

           Notwithstanding  the foregoing,  in the event that in connection with
any Mortgage Loan the Depositor cannot deliver an original recorded  counterpart
of any of the  documents  required to be  delivered  pursuant to clauses (ii) or
(iii) above with evidence of recording  thereon  concurrently with the execution
and delivery  hereof,  the  Depositor  shall  deliver,  or cause the Servicer to
deliver,  to the  Trustee a  duplicate  original  or true copy of such  document
certified by the Depositor or the Servicer or the  applicable  public  recording
office to be a true and  complete  duplicate  original  or copy of the  original
thereof submitted for recording,  or a copy of the Mortgage certified by a title
insurance or escrow company or companies  reasonably  acceptable to the Insurer,
evidencing  that such Mortgage or  assignment of Mortgage has been  delivered to
the appropriate  public recording office for recordation.  In the event that the
Depositor  cannot deliver a duplicate  original or true copy certified as stated
above of such  document  required to be  delivered  pursuant to clauses  (ii) or
(iii) above,  within 45 days of the Delivery  Date,  the Servicer shall purchase
the related  Mortgage Loan at the Purchase Price  therefor.  The Depositor shall
promptly  deliver,  or cause the  Servicer to  deliver,  to the Trustee (A) such
original document with evidence of recording indicated thereon or a photocopy of
such document certified by the appropriate county recorder's office to be a true
and complete copy of the original thereof,  upon receipt thereof from the public
recording official or from the Servicer, and (B) upon discovery of any defect or
omission in the  deliveries of any of items (ii) through (iv) above with respect
to any Mortgage Loan, a correct and complete document or instrument  meeting the
requirements of such item or a certified copy thereof, certified by the relevant
recording office,  but in no event shall any such delivery be made later than 90
days  following  the Delivery  Date (unless such  document has not been returned
from the  relevant  recording  office at such time,  in which case the  Servicer
shall make such  delivery  within 270 days of the Delivery  Date).  From time to
time the  Servicer  may forward or cause to be  forwarded to the Trustee for the
benefit  of the  Certificateholders  [[and  the  Insurer]]  additional  original
documents evidencing an assumption or modification of a Mortgage Loan.

           The Trustee shall promptly  complete the  endorsement of the Mortgage
Note  referred to in (i) above and the  assignment  of  Mortgage  referred to in
(iii)   above  to  the   Trustee   for  the   benefit  of  the  Holders  of  the
[________________]  Mortgage-Backed Pass-Through Certificates,  Series 200_-____
and  [________________________].  The  Trustee on behalf of the  Servicer  shall
promptly record in the appropriate  public office for real property records each
original  assignment  referred to in (iii) above with respect to each  Mortgaged
Property,  and the Trustee shall release any such assignment to the Depositor or
the Servicer,  as  applicable,  for such purpose.  The Depositor or the Servicer
shall promptly deliver to the Trustee each original  assignment with evidence of
recording  indicated thereon or a photocopy thereof certified by the appropriate
county recorder's office to be a true and complete copy of the original thereof,
upon receipt thereof from the public  recording  official.  If any assignment is
returned  unrecorded  to the  Depositor  or the  Servicer  because of any defect
therein,  the  Depositor or the  Servicer  shall

                                       25
<PAGE>

cure or  correct  such  defect  and cause  such  assignment  to be  recorded  in
accordance  with this  paragraph  and if such  defect is not cured the  Servicer
shall purchase the Mortgage Loan at the Purchase Price therefor.

SECTION 2.02 ACCEPTANCE BY TRUSTEE.

           The Trustee will hold the documents referred to in Section 2.01 above
and the  other  documents  constituting  a part of the  Trustee  Mortgage  Files
delivered  to it in trust for the use and  benefit  of all  present  and  future
Certificateholders  [[and the  Insurer]].  Upon  execution  and delivery of this
Agreement and within 45 days after the execution and delivery of this Agreement,
the Trustee shall ascertain whether all documents required to be delivered to it
pursuant to Section 2.01 hereof are in its possession,  and shall deliver to the
Depositor,  the Insurer and the Servicer a  certification  (upon  execution  and
delivery  of this  Agreement,  the  "Initial  Certification"  and within 45 days
thereof,  the  "Final  Certification",  respectively)  in the forms set forth as
EXHIBITS E and F hereto to the effect that,  as to each  Mortgage Loan listed in
the Mortgage Loan  Schedule:  (a) all documents  required to be delivered to the
Trustee  pursuant to this  Agreement are in its  possession,  (b) such documents
have been reviewed by it and have not been mutilated,  damaged, defaced, torn or
otherwise  physically altered,  and such documents relate to such Mortgage Loan,
(c)  based  on its  examination  and  only as to the  foregoing  documents,  the
information  set forth in items (i) through (vi) of the  definition  of Mortgage
Loan Schedule  respecting such Mortgage Loan accurately reflects the information
contained in the  documents in the Trustee  Mortgage  File and (d) each Mortgage
Note has been  endorsed and each  assignment  of Mortgage has been  delivered as
provided in Section 2.01 hereof. The Trustee shall deliver to the Depositor, the
Insurer and the Servicer a copy of such Final  Certification.  If, in the course
of such review, the Trustee finds any document or documents  constituting a part
of a Mortgage  File which do not meet the  requirements  of (a)-(d)  above,  the
Trustee shall  promptly  notify the  Servicer,  the Insurer and the Depositor in
writing,  and request that the Servicer correct or cure such defect. The Trustee
shall  promptly  notify the  Depositor  in writing  if any  original  assignment
referred  to in  clause  (iii)  above  has not  been  received  by it  prior  to
[__________,  200_].  In the event the Servicer or Depositor  shall fail to cure
any document  deficiency or defect  reflected in the Final  Certification  or as
otherwise  required  under Section  2.01, it shall not be the  obligation of the
Trustee hereunder to cure the same, and the Servicer shall purchase the Mortgage
Loan at the Purchase Price therefor.

           The  Depositor  agrees  that at any time and from  time to time  upon
written request of the Trustee or the Insurer,  the Depositor shall promptly and
duly execute and deliver any and all such further documents and assurances,  and
take such  further  actions as the  Trustee  reasonably  may request in order to
obtain or more fully vest the benefits of the assignment  intended hereunder (as
set forth  hereinabove  in Section 2.01 and  hereinbelow in Section 2.03) and of
the rights and powers herein granted.

           The Trustee  shall  retain  possession  and  custody of each  Trustee
Mortgage File in  accordance  with and subject to the terms and  conditions  set
forth herein.

                                       26
<PAGE>

SECTION 2.03          REPRESENTATIONS, WARRANTIES AND
                      COVENANTS OF THE SERVICER AND SELLER.

           [_______________],  as Seller and  Servicer,  hereby  represents  and
warrants to, and  covenants  with,  the  Depositor,  the Insurer and the Trustee
that, as of the date hereof:

(i)  [___________]  is a  [____________],  validly existing and in good standing
     under the laws of [the United States of America]  [__________]  and is duly
     authorized and qualified to transact any and all business  contemplated  by
     this Agreement in any state in which a Mortgaged  Property is located or is
     otherwise not required under  applicable  law to effect such  qualification
     and, in any event,  is in  compliance  with the doing  business laws of any
     such State, to the extent  necessary to ensure the  enforceability  of each
     Mortgage  Loan and the servicing of the Mortgage  Loans in accordance  with
     the terms of this Agreement;

(ii)  [___________]  has the full corporate  power and authority to service each
      Mortgage Loan, and to execute,  deliver and perform, and to enter into and
      consummate the  transactions  contemplated  by this Agreement and has duly
      authorized by all necessary  corporate action on the part of [___________]
      the  execution,  delivery  and  performance  of this  Agreement;  and this
      Agreement, assuming the due authorization,  execution and delivery thereof
      by the Depositor and the Trustee,  constitutes a legal,  valid and binding
      obligation  of  [___________],   enforceable   against   [___________]  in
      accordance with its terms, except that (A) the enforceability  thereof may
      be limited to bankruptcy, insolvency,  moratorium,  receivership and other
      similar laws relating to creditors' rights generally and (B) the remedy of
      specific  performance  and injunctive and other forms of equitable  relief
      may be subject to the  equitable  defenses  and to the  discretion  of the
      court before which any proceeding therefor may be brought;

(iii) the  execution  and  delivery  of this  Agreement  by  [___________],  the
      servicing  of  the  Mortgage  Loans  by   [___________]   hereunder,   the
      consummation of any other of the transactions herein contemplated, and the
      fulfillment  of or  compliance  with the terms  hereof are in the ordinary
      course of business of [___________]  and will not (A) result in a material
      breach of any term or provision of the charter or by-laws of  [__________]
      or (B) materially conflict with, result in a material breach, violation or
      acceleration  of, or result in a material  default under, the terms of any
      other material agreement or instrument to which [__________] is a party or
      by which it may be bound, or any statute,  order or regulation  applicable
      to [__________] of any court,  regulatory body,  administrative  agency or
      governmental body having jurisdiction over [__________];  and [__________]
      is not a party to,  bound by, or in breach or  violation  of any  material
      indenture or other material  agreement or instrument,  or subject to or in
      violation of any statute,  order or  regulation  of any court,  regulatory
      body,  administrative agency or governmental body having jurisdiction over
      it,  which  materially  and  adversely  affects,   or,  to  [__________]'s
      knowledge  would in the future  materially and adversely  affect,  (1) the
      ability of [__________] to perform its obligations under this Agreement or
      (2) the business, operations, financial condition, properties or assets of
      the Servicer taken as a whole;

                                       27
<PAGE>

(iv)  [__________]  is, and will remain,  subject to supervision and examination
      by any state or federal  authority as may be applicable and will remain in
      good standing and qualified to do business where so required by applicable
      law and is, and will remain an approved servicer of conventional  mortgage
      loans for FNMA or FHLMC;

(v)   no  litigation  is pending  or, to the best of  [__________]'s  knowledge,
      threatened,  against  [__________]  that would  materially  and  adversely
      affect the execution,  delivery or enforceability of this Agreement or the
      ability of [__________] to service the Mortgage Loans or to perform any of
      its other obligations hereunder in accordance with the terms hereof;

(vi)  [__________]   will  at  all  times  comply  in  the  performance  of  its
      obligations   under  this  Agreement   with  all   reasonable   rules  and
      requirements of the insurer under each Required Insurance Policy;

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

(viii)except  for  permits  and  similar   authorizations   required  under  the
      securities or "blue sky" laws no consent, approval, authorization or order
      of any court or governmental agency or body is required for the execution,
      delivery and performance by [__________] of, or compliance by [__________]
      with, this Agreement or the consummation of the transactions  contemplated
      hereby,  or if any  such  consent,  approval,  authorization  or  order is
      required, [__________] has obtained the same; and

(ix)  [__________]  will  service  the  Mortgage  Loans in  accordance  with the
      standards set forth in this Agreement.

SECTION 2.04  REPRESENTATIONS,  WARRANTIES AND COVENANTS OF THE SERVICER AND THE
              SELLER WITH RESPECT TO THE MORTGAGE LOANS.

           The Seller and the Servicer  hereby  represents  and warrants to, and
covenants  with, the  Depositor,  the Insurer and the Trustee for the benefit of
the Certificateholders that, as to each Mortgage Loan, as of the Cut-off Date or
such  other  date   specifically   set  forth   herein,   and  with  respect  to
representation (i) listed below, as of the Delivery Date:

(i)  The information  set forth in the Mortgage Loan Schedule is complete,  true
     and correct.

(ii)  All payments  required to be made up to, but  excluding,  the Cut-off Date
      for such  Mortgage  Loan  under the terms of the  Mortgage  Note have been
      made,  except with respect to [___]% of the Mortgage  Loans which are more
      than 30 days but 60 days or less delinquent; [__________] has not advanced
      funds,  or induced,  solicited or knowingly  received any advance of funds
      from a party other than the owner of the

                                       28
<PAGE>

     Mortgaged Property subject to the Mortgage, directly or indirectly, for the
     payment of any amount required by the Mortgage Loan.

(iii) To the best of the Servicer's  knowledge,  there are no delinquent  taxes,
      ground rents, water charges, sewer rents, assessments, insurance premiums,
      leasehold payments,  including  assessments payable in future installments
      or other outstanding charges affecting the related Mortgaged Property.

(iv)  The terms of the Mortgage  Note and the Mortgage  have not been  impaired,
      waived, altered or modified in any respect,  except by written instruments
      which have been  recorded,  if necessary  to protect the  interests of the
      Trustee,  and which have been  delivered  to the Trustee or the  Trustee's
      designee,  the substance of which waiver,  alteration or modification  has
      been approved by the primary mortgage guaranty insurer, if any, and by the
      title  insurer,  to the  extent  required  by the  related  policy  and is
      reflected  on  the  Mortgage  Loan  Schedule.  No  instrument  of  waiver,
      alteration or  modification  has been executed,  and no Mortgagor has been
      released,  in whole or in part,  except in  connection  with an assumption
      agreement  approved by the primary  mortgage  insurer,  if any,  and title
      insurer,  to the  extent  required  by the  policy,  and which  assumption
      agreement  is  part of the  Mortgage  File  and the  terms  of  which  are
      reflected in the Mortgage Loan Schedule.

(v)   The  Mortgage  Note  and the  Mortgage  are not  subject  to any  right of
      rescission,  set-off,  counterclaim  or defense,  including the defense of
      usury, nor will the operation of any of the terms of the Mortgage Note and
      Mortgage,  or the  exercise of any right  thereunder,  render the Mortgage
      unenforceable, in whole or in part, or subject to any right of rescission,
      set-off,  counterclaim  or defense,  including the defense of usury and no
      such  right of  rescission,  set-off,  counterclaim  or  defense  has been
      asserted with respect thereto.

(vi)  All  buildings  upon the  Mortgaged  Property  are  insured by a generally
      acceptable  insurer against loss by fire, hazards of extended coverage and
      such  other  hazards  as are  customary  in the area  where the  Mortgaged
      Property  is  located.  All such  insurance  policies  contain a  standard
      mortgagee  clause  naming the  Servicer,  its  successors  and  assigns as
      mortgagee and all premiums  thereon have been paid. If upon origination of
      the Mortgage Loan, the Mortgaged Property was in an area identified in the
      Federal  Register by the  Federal  Emergency  Management  Agency as having
      special flood hazards (and such flood insurance has been made available) a
      flood insurance policy meeting the requirements of the current  guidelines
      of the Federal Insurance Administration is in effect which policy conforms
      to the  requirements  of  FNMA  and  FHLMC.  The  Mortgage  obligates  the
      Mortgagor  thereunder to maintain all such insurance at  Mortgagor's  cost
      and  expense,  and on the  Mortgagor's  failure to do so,  authorizes  the
      holder of the Mortgage to maintain such insurance at Mortgagor's  cost and
      expense and to seek reimbursement therefor from the Mortgagor.

(vii) Any and all  requirements  of any federal,  state or local law  including,
      without limitation,  environmental,  usury, truth in lending,  real estate
      settlement   procedures,   consumer   credit   protection,   equal  credit
      opportunity  or  disclosure  laws

                                       29
<PAGE>

     applicable  to the Mortgage  Loan and the related  Mortgaged  Property have
     been complied with.

(viii)The  Mortgage  has  not  been  satisfied,  canceled  or  subordinated,  or
      rescinded,  in whole or in part,  and the Mortgaged  Property has not been
      released from the lien of the Mortgage,  in whole or in part,  nor has any
      instrument been executed that would effect any such release, cancellation,
      subordination or rescission.

(ix)  The  Mortgage  is a valid,  existing  and  enforceable  first  lien on the
      Mortgaged  Property,  including all improvements on the Mortgaged Property
      subject  only  to  (A)  the  lien  of  current  real  property  taxes  and
      assessments  not  yet due  and  payable,  (B)  covenants,  conditions  and
      restrictions,  rights of way,  easements  and other  matters of the public
      record as of the date of recording  being  acceptable to mortgage  lending
      institutions  generally  and  specifically  referred to in lender's  title
      insurance  policy  delivered to the  originator  of the Mortgage  Loan and
      which  do not  adversely  affect  the  Appraised  Value  of the  Mortgaged
      Property,  and (C) other  matters to which like  properties  are  commonly
      subject  which  do not  materially  interfere  with  the  benefits  of the
      security  intended to be provided by the  Mortgage or the use,  enjoyment,
      value or marketability  of the related  Mortgaged  Property.  Any security
      agreement,   chattel  mortgage  or  equivalent  document  related  to  and
      delivered in connection  with the Mortgage Loan  establishes and creates a
      valid,  existing and  enforceable  first lien and first priority  security
      interest on the property  described  therein and the Seller has full right
      to sell and assign the same to the Depositor.  The Mortgaged  Property was
      not, as of the date of  origination  of the Mortgaged  Loan,  subject to a
      mortgage,  deed of trust, deed to secure debt or other security instrument
      creating a lien subordinate to the lien of the Mortgage.

(x)   The  Mortgage  Note and the related  Mortgage  are genuine and each is the
      legal, valid and binding  obligation of the maker thereof,  enforceable in
      accordance  with its terms,  except as the  enforceability  thereof may be
      limited by bankruptcy, insolvency, or reorganization.

(xi)  All parties to the Mortgage  Note and the  Mortgage had legal  capacity to
      enter into the Mortgage  Loan and to execute and deliver the Mortgage Note
      and the  Mortgage,  and the Mortgage  Note and the Mortgage have been duly
      and properly executed by such parties.

(xii) The proceeds of the Mortgage  Loan have been fully  disbursed and there is
      no requirement for future advances thereunder and any and all requirements
      as to  completion  of  any  on-site  or  off-site  improvement  and  as to
      disbursements  of any escrow funds  therefor have been complied  with. All
      costs,  fees and expenses  incurred in making or closing the Mortgage Loan
      and the  recording of the  Mortgage  were paid,  and the  Mortgagor is not
      entitled to any refund of any amounts paid or due under the Mortgage  Note
      or Mortgage.

(xiii)The  Mortgage  Note and the  Mortgage  are not  assigned or  pledged,  and
      immediately  prior to the sale of the Mortgage  Loan to the  Depositor the
      Seller was the sole owner of record and holder thereof and with full right
      to transfer and sell the

                                       30
<PAGE>

     Mortgage Loan to the Depositor free and clear of any  encumbrance,  equity,
     lien,  pledge,  charge,  claim or security interest and with full right and
     authority  subject to no interest or  participation  of, or agreement with,
     any other  party,  to sell and assign each  Mortgage  Loan  pursuant to the
     Mortgage Loan Purchase Agreement.

(xiv) All  parties  which  have had any  interest  in the  Mortgage,  whether as
      mortgagee,  assignee,  pledgee or otherwise, are (or, during the period in
      which they held and  disposed of such  interest,  were) (A) in  compliance
      with  any and all  applicable  licensing  requirements  of the laws of the
      state wherein the Mortgaged  Property is located,  and (B) organized under
      the laws of such state,  or (C) qualified to do business in such state, or
      (D)  federal  savings  and loan  associations  or  national  banks  having
      principal offices in such state, or (E) not doing business in such state.

(xv)  The Mortgage Loan is covered by an ALTA lender's  title  insurance  policy
      acceptable to FNMA or FHLMC,  issued by a title insurer acceptable to FNMA
      and FHLMC and  qualified  to do  business  in the  jurisdiction  where the
      Mortgaged  Property  is  located,  insuring  (subject  to  the  exceptions
      contained in (ix)(A) and (B) above) the Seller, its successors and assigns
      as to the first  priority  lien of the Mortgage in the original  principal
      amount of the  Mortgage  Loan.  The  original  title policy and all riders
      thereto are in the possession of the Servicer. Additionally, such lender's
      title  insurance  policy  affirmatively  insures  ingress and egress,  and
      against  encroachments  by or upon the Mortgaged  Property or any interest
      therein.  The Seller is the sole insured of such lender's title  insurance
      policy,  and such  lender's  title  insurance  policy is in full force and
      effect and will be in full force and effect upon the  consummation  of the
      transactions  contemplated  by this  Agreement.  No claims  have been made
      under such lender's  title  insurance  policy,  and no prior holder of the
      related  Mortgage,  including  the Seller,  has done,  by act or omission,
      anything which would impair the coverage of such lender's title  insurance
      policy.

(xvi) There is no default,  breach,  violation or event of acceleration existing
      under the  Mortgage  or the  Mortgage  Note and no event  which,  with the
      passage  of time or with  notice and the  expiration  of any grace or cure
      period,  would  constitute  a  default,  breach,  violation  or  event  of
      acceleration, and the Seller has not waived any default, breach, violation
      or event of acceleration.

(xvii)There are no  mechanics'  or similar liens or claims which have been filed
      for work,  labor or material (and no rights are outstanding that under law
      could give rise to such lien)  affecting  the related  Mortgaged  Property
      which are or may be liens prior to, or equal or coordinate  with, the lien
      of the related Mortgage.

(xviii) All  improvements  which were  considered in  determining  the Appraised
      Value of the related  Mortgaged  Property lay wholly within the boundaries
      and  building  restriction  lines  of  the  Mortgaged  Property,   and  no
      improvements on adjoining properties encroach upon the Mortgaged Property.

(xix) The Mortgage  Loan was  originated  by the Seller or a  subsidiary  of the
      Seller which is a FNMA-approved,  FHLMC-approved or HUD-approved  mortgage


                                       31
<PAGE>

     banker, or savings and loan association,  a savings bank, a commercial bank
     or similar  banking  institution  which is  supervised  and  examined  by a
     federal  or  state  authority.  Principal  payments  on the  Mortgage  Loan
     commenced no more than sixty days after funds were  disbursed in connection
     with the Mortgage  Loan. The Mortgage Note is payable on the [first] day of
     each month in monthly installments of principal and interest, with interest
     in  arrears[,  and requires  Monthly  Payments  sufficient  to amortize the
     original  principal  balance of the Mortgage  Loan over a term of 30 years,
     except for fifteen Mortgage Loans with an amortization term and maturity of
     40 years.  No Mortgage Loans have  provisions  which will require  negative
     amortization. No Mortgage Loan requires a balloon payment at the end of its
     term].

(xx)  The origination  practices used by the Seller and the collection practices
      used by the Servicer  with respect to each Mortgage Note and Mortgage have
      been in all respects legal, proper,  prudent and customary in the mortgage
      origination  and servicing  business.  With respect to escrow deposits and
      escrow  payments,  if any, all such payments are in the  possession of, or
      under the control of, the  Servicer  and there  exist no  deficiencies  in
      connection  therewith  for  which  customary  arrangements  for  repayment
      thereof have not been made. No escrow deposits or escrow payments or other
      charges  or  payments  due the  Seller  have  been  capitalized  under any
      Mortgage or the related Mortgage Note.

(xxi) The  Mortgaged  Property  is free of  damage  and  waste  and  there is no
      proceeding pending for the total or partial condemnation thereof.

(xxii)The Mortgage  contains  customary and  enforceable  provisions  such as to
      render the rights and  remedies  of the holder  thereof  adequate  for the
      realization against the Mortgaged Property of the benefits of the security
      provided thereby, including, (A) in the case of a Mortgage designated as a
      deed  of  trust,   by  trustee's  sale,  and  (B)  otherwise  by  judicial
      foreclosure.  There is no other exemption available to the Mortgagor which
      would  interfere  with  the  right  to sell the  Mortgaged  Property  at a
      trustee's  sale or the right to foreclose the Mortgage.  The Mortgagor has
      not  notified the Servicer and the Servicer has no knowledge of any relief
      requested or allowed to the Mortgagor under the Relief Act.

(xxiii) The Mortgage  Loan was  underwritten  generally in  accordance  with the
      Seller's  underwriting  standards in effect at the time the Mortgage  Loan
      was originated.

(xxiv)The  Mortgage  Note  is not and has not  been  secured  by any  collateral
      except the lien of the corresponding Mortgage and the security interest of
      any applicable  security agreement or chattel mortgage referred to in (ix)
      above.

(xxv) The Mortgage File contains an appraisal of the related Mortgaged  Property
      signed  prior  to the  approval  of the  Mortgage  Loan  application  by a
      qualified  appraiser,  duly  appointed by the  originator  of the Mortgage
      Loan, who had no interest, direct or indirect in the Mortgaged Property or
      in any loan made on the security  thereof,  and whose  compensation is not
      affected by the approval or disapproval of the Mortgage Loan.

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<PAGE>

(xxvi)In the event the Mortgage  constitutes  a deed of trust,  a trustee,  duly
      qualified  under  applicable  law to  serve as  such,  has  been  properly
      designated  and currently so serves and is named in the  Mortgage,  and no
      fees or  expenses  are or will  become  payable  by the  Depositor  to the
      trustee under the deed of trust,  except,  in connection  with a trustee's
      sale after default by the Mortgagor.

(xxvii) No Mortgage Loan contains  provisions pursuant to which Monthly Payments
     are (A) paid or partially paid with funds deposited in any separate account
     established  by the  Seller,  the  Mortgagor,  or  anyone  on behalf of the
     Mortgagor,  (B) paid by any source other than the Mortgagor or (C) contains
     any other similar  provisions  which may constitute a "buydown"  provision.
     The Mortgage Loan is not a graduated payment mortgage loan and the Mortgage
     Loan  does not  have a shared  appreciation  or other  contingent  interest
     feature.

(xxviii) The Seller does not expect, as to any particular Mortgage Loan included
      in the  Trust  Fund,  that such  Mortgage  Loan  will  become a  defaulted
      Mortgage Loan and that the related  Mortgaged  Property will be foreclosed
      upon (or acquired by deed-in-lieu of foreclosure).

(xxix)No  Mortgage  Loan was made in  connection  with (A) the  construction  or
      rehabilitation of a Mortgaged Property or (B) facilitating the trade-in or
      exchange of a Mortgaged Property.

(xxx) The Seller has no knowledge of any circumstances or condition with respect
      to the Mortgage,  the Mortgaged Property, the Mortgagor or the Mortgagor's
      credit standing that can reasonably be expected to cause the Mortgage Loan
      to be an  unacceptable  investment,  cause  the  Mortgage  Loan to  become
      delinquent, or adversely affect the value of the Mortgage Loan.

(xxxi)Each such  Mortgage  Loan with a  Loan-to-Value  Ratio at  origination  in
      excess  of 80% is and will be  subject  to a  Primary  Mortgage  Insurance
      Policy,  issued by a FNMA or FHLMC  approved  insurer,  which insures that
      portion of the  Mortgage  Loan over 75% of the  Loan-to-Value  Ratio.  All
      provisions  of such Primary  Mortgage  Insurance  Policy have been and are
      being  complied  with,  such policy is in full force and  effect,  and all
      premiums due thereunder  have been paid. Any Mortgage  subject to any such
      Primary Mortgage  Insurance  Policy obligates the Mortgagor  thereunder to
      maintain such  insurance and to pay all premiums and charges in connection
      therewith.  The Mortgage Interest Rate for the Mortgage Loan is net of any
      such insurance premium.

(xxxii) To the best of the  Servicer's  knowledge,  the  Mortgaged  Property  is
      lawfully  occupied under  applicable  law. All  inspections,  licenses and
      certificates  required to be made or issued with  respect to all  occupied
      portions  of the  Mortgaged  Property  and,  with  respect  to the use and
      occupancy  of the same,  including  but not  limited  to  certificates  of
      occupancy, have been made or obtained from the appropriate authorities.

                                       33
<PAGE>

(xxxiii) No action has been taken or failed to be taken,  no event has  occurred
      and no state of facts  exists or has  existed  on or prior to the  Cut-off
      Date  (whether  or not known to the Seller on or prior to such date) which
      has  resulted or will result in an exclusion  from,  denial of, or defense
      coverage  under  any  private  mortgage  insurance   (including,   without
      limitation,  any  exclusions,  denials or  defenses  which  would limit or
      reduce the  availability  of the timely  payment of the full amount of the
      loss  otherwise  due  thereunder  to the insured)  whether  arising out of
      actions,  representations,  errors, omissions, negligence, or fraud of the
      Seller, the related Mortgagor or any party involved in the application for
      such coverage, including the appraisal, plans and specifications and other
      exhibits  or  documents  submitted  therewith  to the  insurer  under such
      insurance  policy,  or for any other reason under such  coverage,  but not
      including  the failure of such insurer to pay by reason of such  insurer's
      breach of such insurance policy or such insurer's  financial  inability to
      pay.

(xxxiv) The Assignment of Mortgage,  is in recordable form and is acceptable for
      recording  under  the  laws of the  jurisdiction  in which  the  Mortgaged
      Property is located.

(xxxv)Any future  advances made to the Mortgagor  prior to the Cut-off Date have
      been  consolidated  with the outstanding  principal  amount secured by the
      Mortgage,  and the secured  principal  amount,  as  consolidated,  bears a
      single  interest rate and single  repayment term. The lien of the Mortgage
      securing the consolidated  principal amount is expressly insured as having
      consolidated  principal  amount is expressly  insured as having first lien
      priority  by a  title  insurance  policy,  an  endorsement  to the  policy
      insuring the mortgagee's  consolidated interest or by other title evidence
      acceptable to FNMA and FHLMC. The  consolidated  principal amount does not
      exceed the original principal amount of the Mortgage Loan.

(xxxvi) If the  Mortgaged  Property  is a  condominium  unit or a  planned  unit
      development  (other  than a de  minimis  planned  unit  development)  such
      condominium  or  planned  unit  development  project  meets  FNMA or FHLMC
      eligibility requirements.

(xxxvii) With  respect  to  each  Convertible  Mortgage  Loan,  (x) the  related
      Mortgagor  has the  option to  convert  the  interest  rate  borne by such
      Mortgage  Loan from an adjustable  interest rate to a fixed  interest rate
      determined  pursuant to the terms of the related Mortgage Note and (y) the
      fixed  interest  rate to be borne by each such  Convertible  Mortgage Loan
      upon the conversion of the interest rate on such Mortgage Loan is intended
      to approximate a market rate of interest for newly originated mortgages at
      the time of the conversion.

(xxxviii) Each  Mortgage is a  "qualified  mortgage"  for  purposes of the REMIC
     Provisions.

           Upon the discovery by the Depositor, the Servicer, the Insurer or the
Trustee (or upon notice thereof in writing from a Certificateholder) of a breach
or breaches of any of the representations and warranties made in Section 2.04 in
respect of any Mortgage Loan, or any breach of a  representation  or warranty of
the Servicer set forth in Section 2.03,  which breach or breaches,  individually
or in the  aggregate,  materially  and  adversely  affect the  interests  of the

                                       34
<PAGE>

Certificateholders  or the Insurer, the party discovering such breach shall give
prompt written notice to the other  parties.  The Trustee shall promptly  notify
the Seller and  Servicer of such breach and request that the Seller or Servicer,
as the  case may be,  cure  such  breach  within  60 days  from the date of such
notice,  and if the Seller or Servicer does not cure such breach in all material
respects,  the  Seller  or  Servicer,  as the  case  may be,  shall  either  (i)
substitute a Replacement  Mortgage Loan or Loans for the related  Mortgage Loan,
which  substitution  must be made as specified in this Section or (ii)  purchase
such  Mortgage  Loan held for the  benefit of the  Certificateholders  [[and the
Insurer]] from the Trustee at the Purchase Price therefor.

           The  Seller or  Servicer  shall not have any  right to  substitute  a
Replacement  Mortgage  Loan or Loans for the  affected  Mortgage  Loan more than
three months after the Delivery  Date (or more than two years after the Delivery
Date if the related Mortgage Loan is a "defective obligation" within the meaning
of  Section  860G(a)(4)(B)(ii)  of the  Code),  and  any  substitution  must  be
accompanied  by an  Officers'  Certificate  delivered  to the Trustee  [[and the
Insurer]],  certifying  that such  Replacement  Mortgage  Loan  conforms  to the
requirements of this Agreement,  and by an Opinion of Counsel to the effect that
such  substitution  will not cause either REMIC I or REMIC II to fail to qualify
as a REMIC and will not result in a prohibited transaction tax, which Opinion of
Counsel  shall  be paid  for by the  Seller  or  Servicer,  as the  case may be.
Notwithstanding the foregoing, if any such breach would cause a Mortgage Loan to
be other than a "qualified  mortgage loan" as described in Section 860G(a)(3) of
the Code,  any  substitution  shall occur within 90 days of the discovery of the
breach.

           As to any Replacement  Mortgage Loan or Loans, the Seller or Servicer
shall deliver to the Trustee for such  Replacement  Mortgage Loan or Loans,  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  to the  Trustee for the benefit of the Insurer and the
Holders of the [__________]  Mortgage-Backed  Pass-Through Certificates,  Series
200_-____.  No  substitution  will be  made  in any  calendar  month  after  the
Determination  Date  for such  month.  Monthly  payments  due  with  respect  to
Replacement Mortgage Loans in the month of substitution shall not be part of the
Trust Fund and will be remitted by the  Servicer or Seller to the  Depositor  on
the  next  succeeding   Distribution   Date.  For  the  month  of  substitution,
distributions to Certificateholders will include the Monthly Payment due on such
Deleted  Mortgage Loan for such month and thereafter the Seller or Servicer,  as
the case may be, shall be entitled to retain all amounts  received in respect of
such Deleted Mortgage Loan.

           Upon  such  substitution,  the  Servicer  shall  amend or cause to be
amended the  Mortgage  Loan  Schedule  to reflect  the  removal of such  Deleted
Mortgage Loan and the  substitution of the  Replacement  Mortgage Loan or Loans.
Upon such substitution,  the Replacement 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,  as of the date of  substitution,  with  respect  to the  Replacement
Mortgage Loan or Loans,  the  representations  and warranties  pertaining to the
Mortgage  Loans  contained in Section  2.04 hereof.  Upon receipt of the Trustee
Mortgage File  pertaining to any Replacement  Mortgage Loans,  the Trustee shall
release the Trustee Mortgage File held for the benefit of the Certificateholders
[[and the  Insurer]]  relating to such  Deleted  Mortgage  Loan to the Seller or
Servicer  as  applicable  and shall  execute  and deliver  such  instruments  of
transfer or assignment,  in each case without recourse, as shall be necessary to
vest title (to the extent that such title was transferred to the Trustee) in the
Seller or Servicer as

                                       35
<PAGE>

applicable,  or its  designee  to any  Deleted  Mortgage  Loan  substituted  for
pursuant to this Section 2.04.

           In any month in which the Seller or Servicer  substitutes one or more
Replacement  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 Replacement  Mortgage Loans as of the date of substitution is less than
the aggregate Principal Balance of all such Deleted Mortgage Loans (in each case
after  application  of  scheduled  principal  portion  of the  monthly  payments
received in the month of  substitution).  The amount of such  shortage  shall be
deposited  into the Custodial  Account by the Seller or Servicer in the month of
substitution  pursuant to Section 3.07, without any reimbursement  thereof.  The
Servicer shall give notice in writing to the Trustee of such event, which notice
shall be accompanied by an Officers'  Certificate as to the  calculation of such
shortage.

           In the event that the Seller or  Servicer  shall have  repurchased  a
Mortgage  Loan,  upon  receipt by the  Trustee of  written  notification  of the
deposit of the Purchase  Price,  the Trustee shall  release the related  Trustee
Mortgage File held for the benefit of the Certificateholders [[and the Insurer]]
to the Seller or  Servicer  as  applicable  and the  Trustee  shall  execute and
deliver the related instruments of transfer or assignment,  in each case without
recourse, as shall be necessary to transfer title (to the extent that such title
was  transferred  to the  Trustee)  from  the  Trustee  for the  benefit  of the
Certificateholders [[and the Insurer]] and vest title in the Seller or Servicer,
or the  designee  thereof,  as the case may be, to any Mortgage  Loan  purchased
pursuant to this Section 2.04. It is understood  and agreed that the  obligation
under this Agreement of any Person to repurchase or substitute any Mortgage Loan
as to which such breach has occurred and is continuing shall constitute the sole
and exclusive remedy respecting such breach available to  Certificateholders  or
the Trustee on their behalf (except for the Insurer's rights under the Insurance
Agreement).

SECTION 2.05 ISSUANCE OF CERTIFICATES.

           The Trustee  acknowledges  the assignment to it of the Mortgage Loans
together  with the  assignment  to it of all other assets  included in the Trust
Fund, receipt of which is hereby acknowledged. Concurrently with such assignment
and delivery  and in exchange  therefor,  the  Trustee,  pursuant to the written
request of the Depositor  executed by an officer of the Depositor,  has executed
the  Class  A,  Class  S  and  Class  R  Certificates  and  caused  them  to  be
authenticated  and delivered to or upon the order of the Depositor in authorized
denominations  which  evidence  ownership  of the Trust Fund.  The rights of the
Holders of such  Certificates to receive  distributions  from the Trust Fund and
all  ownership  interests  of the  Holders  of the Class A,  Class S and Class R
Certificates in such distributions shall be as set forth in this Agreement.

SECTION 2.06 REMIC PROVISIONS.

(a) [The  Depositor  hereby elects and  authorizes  the Trustee to treat each of
REMIC I and  REMIC  II as a REMIC  under  the  Code  and,  if  necessary,  under
applicable  state  law.  Each such  election  will be made on Form 1066 or other
appropriate  federal  tax or  information  return  (including  Form 8811) or any
appropriate  state return (x) for the taxable year ending on the last day of the
calendar year in which the Certificates are issued and (y) for the

                                       36
<PAGE>
taxable year ending on the last day of the calendar  year in which  Certificates
are first sold by  [__________]  to a third party.  The Delivery  Date is hereby
designated  as the  "startup  day" of each of REMIC I and  REMIC II  within  the
meaning of Section  860G(a)(9) of the Code. The "regular  interests" (within the
meaning  of  Section  860G of the Code) in REMIC I shall  consist of the REMIC I
Regular  Interests and the  "residual  interest" in REMIC I shall consist of the
Class R-I Certificates.  The "regular  interests" (within the meaning of Section
860G of the  Code)  in  REMIC  II  shall  consist  of the  Class  A and  Class S
Certificates and the "residual  interest" in REMIC II shall consist of the Class
R-II  Certificates.  The Depositor and the Trustee shall not permit the creation
of any  "interests"  (within the meaning of Section 860G of the Code) in REMIC I
or REMIC II other than the REMIC I Regular  Interests and Class R-I Certificates
and the Class A Certificates,  Class S Certificates and Class R-II Certificates,
respectively.

     (b) [__________] on behalf of the Holders of the Class R-I Certificates and
Class R-II Certificates,  shall act as agent for the Class R-I Certificateholder
and Class R-II Certificateholder as the "tax matters person" (within the meaning
of the REMIC Provisions) for REMIC I and REMIC II,  respectively,  in the manner
provided under Treasury  regulations  section 1.860F-4(d) and temporary Treasury
regulations  section   301.6231(a)(7)-1T.   By  its  acceptance  of  a  Class  R
Certificate, each Holder thereof shall have agreed to such appointment and shall
have  consented to the  appointment of the Trustee as its agent to act on behalf
of REMIC I and REMIC II pursuant to the specific duties outlined herein.

     (c) A Holder of the Class R-I or Class R-II  Certificates,  by the purchase
of such Certificates,  shall be deemed to have agreed to timely pay, upon demand
by the Trustee,  the amount of any minimum  California state franchise taxes due
with respect to REMIC I or REMIC II,  respectively,  under Sections 23151(a) and
23153(a)  of the  California  Revenue and  Taxation  Code.  Notwithstanding  the
foregoing, the Trustee shall be authorized to retain the amount of such tax from
amounts otherwise distributable to such Holder in the event such Holder does not
promptly pay such amount upon demand by the Trustee. In the event that any other
federal,  state or local tax is  imposed,  including  without  limitation  taxes
imposed on a "prohibited  transaction"  of a REMIC as defined in Section 860F of
the Code,  such tax shall be charged  against  amounts  otherwise  available for
distribution to the applicable  Holder of a Class R Certificate and then against
amounts  otherwise   available  for  distribution  to  the  Holders  of  Regular
Certificates  in accordance  with the  provisions set forth in Sections 4.02 and
4.03,  respectively.  The  Trustee  shall  promptly  deposit in the  Certificate
Account any amount of "prohibited transaction" tax that results from a breach of
the Trustee's  duties under this Agreement.  The Servicer shall promptly deposit
in the  Certificate  Account  any amount of  "prohibited  transaction"  tax that
results from a breach of the Servicer's duties under this Agreement.

     (d) The Trustee shall act as attorney-in-fact and as agent on behalf of the
tax  matters  person of REMIC I and REMIC II and in such  capacity  the  Trustee
shall:  (i) prepare,  sign and file, or cause to be prepared,  signed and filed,
federal and state tax  returns  using a calendar  year as the  taxable  year for
REMIC I and  REMIC II when and as  required  by the REMIC  Provisions  and other
applicable  federal income tax laws as the direct  representative of REMIC I and
REMIC II in compliance with the Code and shall provide copies of such returns as
required by the Code; (ii) make an election,  on behalf of REMIC I and REMIC II,
to be treated as a REMIC on the  federal  tax return of such REMIC for its first
taxable  year, in accordance  with the REMIC  Provisions;  and (iii) prepare and
forward, or cause to be prepared and

                                       37
<PAGE>

forwarded,  to the  Certificateholders  and to any governmental taxing authority
all  information  reports  as and  when  required  to be  provided  to  them  in
accordance with the REMIC Provisions.  The expenses of preparing and filing such
returns shall be borne by the Trustee.  The Depositor and Servicer shall provide
on a prompt and timely  basis to the Trustee or its  designee  such  information
with respect to REMIC I and REMIC II as is in their  possession  and  reasonably
required or  requested  by the  Trustee to enable it to perform its  obligations
under this subsection.

           In its capacity as attorney-in-fact and as agent on behalf of the tax
matters person,  [__________] shall also: (A) act on behalf of REMIC I and REMIC
II in relation to any tax matter or  controversy  involving the Trust Fund,  (B)
represent the Trust Fund in any administrative or judicial  proceeding  relating
to an examination  or audit by any  governmental  taxing  authority with respect
thereto and (C) cause to be paid solely  from the  sources  provided  herein the
amount of any taxes imposed on REMIC I or REMIC II when and as the same shall be
due and payable (but such obligation  shall not prevent the Trustee or any other
appropriate  Person from contesting any such tax in appropriate  proceedings and
shall not prevent the Trustee from withholding payment of such tax, if permitted
by law, pending the outcome of such proceedings).

     (e)  The  Trustee  shall  provide  (i)  to  any  transferor  of a  Class  R
Certificate  such  information  as is necessary for the  application  of any tax
relating  to the  transfer of a Class R  Certificate  to any Person who is not a
permitted  transferee,  (ii) to the Trustee and the Trustee shall forward to the
Certificateholders  such  information  or reports as are required by the Code or
the REMIC  Provisions  including  reports  relating to interest,  original issue
discount  and market  discount  or  premium  and (iii) to the  Internal  Revenue
Service the name,  title,  address and  telephone  number of the person who will
serve as the representative of each of REMIC I and REMIC II.

     (f) The Trustee,  the Depositor and the Holder of the Class R  Certificates
shall take any action or cause the Trust  Fund to take any action  necessary  to
create or  maintain  the status of each of REMIC I and REMIC II as a REMIC under
the REMIC  Provisions  and shall  assist  each other as  necessary  to create or
maintain  such  status.  Neither  the  Trustee  nor the  Holder  of the  Class R
Certificates  shall take any action,  cause the Trust Fund to take any action or
fail to take (or fail to cause the Trust  Fund to take) any action  that,  under
the  REMIC  Provisions,  if taken or not  taken,  as the case may be,  could (i)
endanger  the status of either  REMIC I or REMIC II as a REMIC or (ii) result in
the  imposition  of a tax upon either  REMIC I or REMIC II  (including,  but not
limited  to, the tax on  prohibited  transactions  as  defined  in Code  Section
860F(a)(2) and the tax on prohibited  contributions set forth in Section 860G(d)
of the Code) (either such event,  an "Adverse  REMIC Event")  unless the Trustee
has received an Opinion of Counsel (at the expense of the party  seeking to take
such action) to the effect that the  contemplated  action will not endanger such
status or result in the imposition of such a tax.

           The Trustee shall not take or fail to take any action (whether or not
authorized  hereunder)  as to which the Servicer or Depositor  has advised it in
writing that it has received an Opinion of Counsel to the effect that an Adverse
REMIC Event could  occur with  respect to such  action.  In  addition,  prior to
taking  any  action  with  respect  to REMIC I or REMIC II or their  assets,  or
causing  REMIC I and  REMIC  II to  take  any  action,  which  is not  expressly
permitted under the terms of this  Agreement,  the Trustee will consult with the
Servicer and Depositor or

                                       38
<PAGE>

their designees,  in writing, with respect to whether such action could cause an
Adverse  REMIC  Event to occur  with  respect  to REMIC I or REMIC  II,  and the
Trustee  shall not take any such action or cause REMIC I or REMIC II to take any
such action as to which the Servicer or Depositor has advised it in writing that
an Adverse REMIC Event could occur.

           In addition,  prior to taking any action with respect to either REMIC
I or REMIC II or the assets  therein,  or causing  either REMIC I or REMIC II to
take any  action,  which is not  expressly  permitted  under  the  terms of this
Agreement,  the Holder of the Class R Certificates will consult with the Trustee
or its designee,  in writing, with respect to whether such action could cause an
Adverse  REMIC Event to occur with respect to either REMIC I or REMIC II, and no
such  Person  shall  take any  action or cause  the Trust  Fund to take any such
action as to which the Trustee has advised it in writing  that an Adverse  REMIC
Event could  occur.  The Trustee may consult  with  counsel to make such written
advice,  and the cost of same shall be borne by the party seeking to take action
not permitted by this Agreement.

           At all times as may be required by the Code, the Servicer will to the
extent  within its  control and the scope of its duties  more  specifically  set
forth herein,  maintain  substantially all of the assets of REMIC I and REMIC II
as  "qualified  mortgages"  as  defined in  Section  860G(a)(3)  of the Code and
"permitted investments" as defined in Section 860G(a)(5) of the Code.

     (g) In the event that any tax is imposed on  "prohibited  transactions"  of
REMIC I or REMIC II, as  defined  in  Section  860F(a)(2)  of the Code,  on "net
income from foreclosure  property" of REMIC I or REMIC II, as defined in Section
860G(c)  of the  Code,  on any  contributions  to REMIC I or REMIC II after  the
Startup Day therefor  pursuant to Section  860G(d) of the Code, or any other tax
is imposed by the Code or any applicable  provisions of state or local tax laws,
such tax shall be  charged  (i) to the  Servicer,  if such tax  arises out of or
results  from a breach by the  Servicer  of any of its  obligations  under  this
Agreement or if the Servicer has in its sole discretion  determined to indemnify
the Trust Fund against such tax, (ii) to the Trustee,  if such tax arises out of
or results  from a breach by the  Trustee of any of its  obligations  under this
Article  II, or (iii)  otherwise  against  amounts on  deposit in the  Custodial
Account as provided by Section 3.09 and on the  Distribution  Date(s)  following
such  reimbursement  the aggregate of such taxes shall be allocated in reduction
of the Interest  Distribution  Amount on each Class entitled thereto in the same
manner as if such taxes constituted a Prepayment Interest Shortfall.

     (h) The Trustee and the Servicer  shall,  for federal  income tax purposes,
maintain  books and records  with  respect to REMIC I and REMIC II on a calendar
year and on an  accrual  basis or as  otherwise  may be  required  by the  REMIC
Provisions.

     (i) Following  the Startup Day,  neither the Servicer nor the Trustee shall
accept any  contributions  of assets to REMIC I or REMIC II unless  (subject  to
2.06(f)) the Servicer and the Trustee  shall have received an Opinion of Counsel
(at the expense of the party  seeking to make such  contribution)  to the effect
that the  inclusion  of such assets in REMIC I or REMIC II will not cause either
REMIC  I or  REMIC  II to fail  to  qualify  as a REMIC  at any  time  that  any
Certificates  are  outstanding,  or subject REMIC I or REMIC II to any tax under
the REMIC Provisions or other applicable provisions of federal,  state and local
law or ordinances.

                                       39
<PAGE>

     (j) Neither the Servicer nor the Trustee shall (subject to Section 2.06(f))
enter into any  arrangement  by which REMIC I or REMIC II will  receive a fee or
other  compensation  for  services  nor permit  either such REMIC to receive any
income  from  assets  other  than  "qualified  mortgages"  as defined in Section
860G(a)(3)  of the  Code  or  "permitted  investments"  as  defined  in  Section
860G(a)(5) of the Code.

     (k) Within 30 days after the Closing  Date,  the Trustee  shall prepare and
file with the Internal Revenue Service Form 8811,  "Information  Return for Real
Estate Mortgage  Investment  Conduits (REMIC) and Issuers of Collateralized Debt
Obligations" for REMIC I and REMIC II.

     (l)  Neither  the  Trustee  nor the  Servicer  shall  sell,  dispose  of or
substitute  for any of the Mortgage  Loans  (except in  connection  with (i) the
default,  imminent default or foreclosure of a Mortgage Loan,  including but not
limited to, the acquisition or sale of a Mortgaged  Property acquired by deed in
lieu of  foreclosure,  (ii) the  bankruptcy  of REMIC I or REMIC  II,  (iii) the
termination  of REMIC I or REMIC II pursuant to Article X of this  Agreement  or
(iv) a  purchase  of  Mortgage  Loans  pursuant  to  Article  II or III of  this
Agreement)  nor  acquire any assets for REMIC I or REMIC II, nor sell or dispose
of any investments in the Custodial Account or the Certificate  Account for gain
nor accept any  contributions  to REMIC I or REMIC II after the Closing Date (a)
unless it has  received  an  Opinion of  Counsel  that such  sale,  disposition,
substitution or acquisition  will not affect adversely the status of REMIC I and
REMIC II as  REMICs  or (b)  unless  the  Servicer  has  determined  in its sole
discretion to indemnify the Trust Fund against such tax.

     (m) In order to enable  the  Trustee  to  perform  its  duties as set forth
herein,  the Depositor  shall  provide,  or cause to be provided to the Trustee,
within  ten days  after the  Delivery  Date,  all  information  or data that the
Trustee  determines  to be  relevant  for tax  purposes  to the  valuations  and
offering prices of the Certificates,  including,  without limitation, the price,
yield,  prepayment  assumption and projected cash flows of the  Certificates and
the  Mortgage  Loans and the Trustee  shall be entitled to rely upon any and all
such  information  and data in the  performance  of its duties set forth herein.
Thereafter, the Servicer shall provide, promptly upon request therefor, any such
additional information or data that the Trustee may from time to time reasonably
request in order to enable the Trustee to perform its duties as set forth herein
and the Trustee shall be entitled to rely upon any and all such  information and
data in the  performance  of its duties set forth herein.  The  Depositor  shall
indemnify  the Trustee and hold its  harmless for any loss,  liability,  damage,
claim or expense of the Trustee  arising  from any failure of the  Depositor  to
provide, or to cause to be provided, accurate information or data to the Trustee
on a timely basis. The Servicer shall indemnify the Trustee and hold it harmless
for any loss,  liability,  damage,  claim or expense of the Trustee arising from
any failure of the  Servicer to provide,  or to cause to be  provided,  accurate
information  or data to the  Trustee  on a  timely  basis.  The  indemnification
provisions  hereunder  shall survive the termination of this Agreement and shall
extend to any co-trustee appointed pursuant to this Agreement.]

                                       40
<PAGE>

                                   ARTICLE III

                          ADMINISTRATION AND SERVICING
                                OF MORTGAGE LOANS

SECTION 3.01 SERVICING STANDARD.

           For  and  on   behalf   of  the   Trustee,   the   Insurer   and  the
Certificateholders, the Servicer shall service and administer the Mortgage Loans
in accordance  with prudent  mortgage loan  servicing  standards and  procedures
generally  accepted in the mortgage  banking  industry and generally in a manner
consistent with FNMA guidelines except as otherwise  expressly  provided in this
Agreement.  In connection with such servicing and  administration,  the Servicer
shall  have  full  power  and   authority,   acting  alone  and/or  through  any
Sub-Servicer  as provided in Section 3.02 hereof,  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 (a) to execute and deliver, on behalf of
the Certificateholders and the Trustee,  customary consents or waivers and other
instruments   and   documents   (including,    without   limitation,    estoppel
certificates),  (b) 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),  (c)  to  collect  any  Insurance  Proceeds  and
Liquidation Proceeds, (d) to consent to any subordinate financings to be secured
by any Mortgaged  Property to the extent that such consent is required  pursuant
to the terms of the related  Mortgage,  (e) to consent to the application of any
proceeds of insurance policies or condemnation  awards to the restoration of the
applicable Mortgaged Property or otherwise, and (f) subject to the provisions of
Section 3.07 and 3.13,  to  effectuate  foreclosure  or other  conversion of the
ownership  of the  Mortgage  Property  securing  any  Mortgage  Loan;  PROVIDED,
HOWEVER, that the Servicer shall take no action that is materially  inconsistent
with or materially  prejudices  the interest of the Trustee,  the Insurer or the
Certificateholders  in any  Mortgage  Loan or the  rights  and  interest  of the
Depositor,  the Insurer, the Trustee and the Certificateholders  under the terms
of this  Agreement  unless such action is  specifically  called for by the terms
hereof.

           Without limiting the generality of the foregoing,  but subject to the
terms hereof, the Servicer,  in its own name or in the name of the Depositor and
the  Trustee,  is hereby  authorized  and  empowered  by the  Depositor  and the
Trustee,  when the Servicer  believes it appropriate  in its best  judgment,  to
execute  and  deliver,   on  behalf  of  the   Trustee,   the   Depositor,   the
Certificateholders  or any of them,  any and all  instruments  of  modification,
satisfaction,  cancellation  or  assignment,  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 promptly  notify the Trustee of any such
execution  and  delivery.  The  Depositor and the Trustee for the benefit of the
Certificateholders  shall  furnish the Servicer  with any powers of attorney and
other  documents  necessary or appropriate to enable the Servicer to service and
administer the Mortgage Loans.

           In  accordance  with the standards of the  preceding  paragraph,  the
Servicer  shall  advance  or cause to be  advanced  funds as  necessary  for the
purpose  of  effecting  the  timely  payment  of taxes and  assessments  on each
Mortgaged  Property or any related unpaid insurance premiums that are not timely
paid  by the  Mortgagors  prior  to any  such  time  as a  Mortgage  Loan

                                       41
<PAGE>

is in  foreclosure;  PROVIDED,  HOWEVER,  that the Servicer shall be required 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 (net of Liquidation  Expenses) or otherwise;  and PROVIDED
FURTHER,  that such payments  shall be advanced  when the tax,  premium or other
cost for which such  payment is  intended  is due.  Any such  advances  shall be
reimbursable  in the first  instance from related  collections  from the related
Mortgagors pursuant to Section 3.07 hereof, and further as Liquidation  Expenses
as  provided  in Section  3.13 hereof and may be  withdrawn  from the  Custodial
Account  pursuant to Section 3.09 hereof.  All costs incurred by the Servicer or
by the  related  Sub-Servicer  in  effecting  the timely  payments  of taxes and
assessments  on the Mortgaged  Properties and related  insurance  premiums shall
not,   for  the   purpose   of   calculating   monthly   distributions   to  the
Certificateholders, be added to the Principal Balance under the related Mortgage
Loans, notwithstanding that the terms of such Mortgage Loans so permit.

           Notwithstanding  anything  in this  Agreement  to the  contrary,  the
Servicer  shall not  (unless the  Mortgagor  is in default  with  respect to the
Mortgage  Loan or such  default is, in the judgment of the  Servicer,  imminent)
permit any modification  with respect to any Mortgage Loan that would change the
Net Mortgage  Rate or,  reduce or increase  the  principal  balance  (except for
reductions resulting from actual payments of principal),  except for conversions
to a fixed rate in accordance with the terms of the Mortgage Loan.

SECTION 3.02 ENFORCEMENT OF THE OBLIGATIONS OF SUB-SERVICERS.

     (a) For purposes of this  Agreement,  the Servicer  shall be deemed to have
received  the payments on the Mortgage  Loans  referred to in Sections  3.07 and
3.08 hereof when the related  Sub-Servicer  has received such payments and shall
remain  obligated to deposit such payments in accordance  with Sections 3.07 and
3.08  hereof,   regardless   of  whether  such  payments  are  remitted  by  the
Sub-Servicer  to the  Servicer.  The Servicer and the related  Sub-Servicer  may
enter into  amendments  to any  applicable  Sub-Servicing  Agreement;  PROVIDED,
HOWEVER, that any such amendments shall be consistent with and shall not violate
the provisions of this Agreement;  and PROVIDED  FURTHER,  that the substance of
any such material amendment or material change shall be transmitted  promptly to
the Depositor, the Trustee, the Insurer and the Rating Agencies.

     (b) As part of its servicing activities  hereunder,  the Servicer,  for the
benefit of the Depositor,  the Trustee, the Insurer and the  Certificateholders,
shall supervise,  administer,  monitor and oversee the servicing of the Mortgage
Loans that are not serviced by it directly, and shall enforce the obligations of
each Sub-Servicer under the related  Sub-Servicing  Agreement.  Such enforcement
shall include, without limitation,  the legal prosecution of claims, termination
of  Sub-Servicing  Agreements,   as  appropriate,   and  the  pursuit  of  other
appropriate  remedies,  and  shall be in such  form and  carried  out to such an
extent and at such time as the Servicer,  in its good faith  business  judgment,
would  require  were it the owner of the related  Mortgage  Loans.  The Servicer
shall  pay the  costs  of such  enforcement  at its own  expense,  but  shall be
reimbursed  therefor  only (i)  from a  general  recovery  resulting  from  such
enforcement  only to the extent,  if any, that such recovery exceeds all amounts
due in respect of the related Mortgage Loans or (ii) from a specific recovery of
costs,   expenses  or  attorneys  fees  against  the  party  against  whom  such
enforcement is directed.  The Servicer shall not waive any event of default by a
Sub-Servicer

                                       42
<PAGE>

under a Sub-Servicing Agreement which is a failure to remit any payment required
to be made by such  Sub-Servicer  that would result in an Event of Default under
this Agreement.

     (c) During the term of this  Agreement,  the Servicer  shall  consult fully
with each of the  Sub-Servicers as may be necessary from time to time to perform
and carry out the  Servicer's  obligations  hereunder  and  receive,  review and
evaluate  all  reports,  information  and other  data that are  provided  to the
Servicer by each Sub-Servicer and otherwise exercise reasonable efforts to cause
each  Sub-Servicer  to  perform  and  observe  the  covenants,  obligations  and
conditions to be performed or observed by it under its Sub-Servicing  Agreement.
If any  Sub-Servicer  materially  breaches  or fails to perform  or observe  any
material obligations or conditions of its Sub-Servicing  Agreement, the Servicer
shall  promptly  deliver to the  Depositor,  the  Insurer  and to the Trustee an
Officers'  Certificate  certifying  that such  Sub-Servicer  is in  default  and
describing  the events and  circumstances  giving  rise to the  default and what
action (if any) has been,  or is to be,  taken by the  Sub-Servicer  to cure the
default and setting forth the action to be taken by the Servicer.

SECTION 3.03 TERMINATION OF THE RIGHTS OF SUB-SERVICERS.

           If the Servicer  terminates  the rights of a  Sub-Servicer  under any
Sub-Servicing  Agreement, the Servicer shall service the Mortgage Loans directly
pursuant  to and in  accordance  with  the  terms of this  Agreement,  or at the
Servicer's  election,  enter into a substitute  servicing agreement with another
mortgage loan  servicing  company  reasonably  acceptable to the Trustee and the
Servicer under which such mortgage loan servicing company shall assume, satisfy,
perform and carry out all liabilities,  duties, responsibilities and obligations
that are to be, or otherwise were to have been, satisfied, performed and carried
out by the  terminated  Sub-Servicer,  regardless  of whether such  liabilities,
duties,  responsibilities  or obligations shall have accrued before or after the
termination of the rights of such Sub-Servicer; PROVIDED, HOWEVER, that any such
substitute  servicer  and  any  such  substitute  servicing  shall  satisfy  the
requirements  of Sections 3.01 and 3.02. If the Servicer does not elect to enter
into a substitute  servicing agreement with a successor  servicer,  the Servicer
shall  nevertheless  service  the  Mortgage  Loans  directly  pursuant to and in
accordance with the terms of this Agreement, until a substitute Sub-Servicer has
been  appointed and  designated  and a substitute  servicing  agreement has been
entered  into by the  Servicer and such  substitute  Sub-Servicer.  The Servicer
shall give notice to the  Trustee,  the  Insurer and the Rating  Agencies of any
termination of a Sub-Servicer and any appointment or designation of a substitute
Sub-Servicer.

SECTION 3.04 LIABILITY OF THE SERVICER.

           Notwithstanding the provisions of any Sub-Servicing Agreement, any of
the provisions of this Agreement relating to agreements or arrangements  between
the  Servicer  or a  Sub-Servicer  or  reference  to  actions  taken  through  a
Sub-Servicer or otherwise, the Servicer shall remain obligated and liable to the
Depositor, the Trustee, the Insurer and the Certificateholders for the servicing
and administering of the Mortgage Loans included in the Trust Fund in accordance
with (and subject to the  limitations  contained  within) the provisions of this
Agreement  without  diminution of such obligation or liability by virtue of such
Sub-Servicing   Agreements  or  agreements  or  arrangements  or  by  virtue  of
indemnification  from the Sub-Servicer and to the same extent and under the same
terms and conditions as if the Servicer  alone


                                       43
<PAGE>

were  servicing and  administering  the Mortgage  Loans.  The Servicer  shall be
entitled to enter into any agreement  with the Depositor or a  Sub-Servicer  for
indemnification of the Servicer and nothing contained in this Agreement shall be
deemed to limit or modify such indemnification.

SECTION 3.05 RIGHTS OF THE DEPOSITOR AND THE TRUSTEE IN RESPECT OF THE SERVICER.

           The Servicer shall afford the Depositor, the Insurer and the Trustee,
without charge but only upon reasonable notice and during normal business hours,
access to all records and documentation in the Servicer's  possession  regarding
the Mortgage Loans and to all accounts,  insurance policies and other matters in
the Servicer's  possession  relating to this Agreement and access to officers of
the Servicer responsible for its obligations  hereunder.  The Depositor may, but
is not obligated to,  enforce the  obligations  of the Servicer  hereunder.  The
Depositor  shall not have any  responsibility  or  liability  for any  action or
failure to act by the Servicer and is not obligated to supervise the performance
of the Servicer hereunder or otherwise.

SECTION 3.06 TRUSTEE TO ACT AS SERVICER.

           In the event that the Servicer  shall for any reason no longer be the
Servicer  hereunder  (including  by reason of an Event of Default),  the Trustee
shall  thereupon  assume  all of the  rights  and  obligations  of the  Servicer
hereunder  arising  thereafter  (except that the Trustee shall not be liable for
losses of the  Servicer  pursuant  to Section  3.07  hereof,  obligated  to make
Monthly Advances if prohibited by applicable law, nor to effectuate  repurchases
or substitutions of Mortgage Loans hereunder as substitute  Servicer,  including
pursuant  to  Section  2.04  hereof  and  except  that  the  Trustee   makes  no
representations  and warranties  hereunder,  including  pursuant to Section 2.04
hereof).  If the  Servicer  shall  for any  reason  no  longer  be the  Servicer
(including  by  reason  of any  Event of  Default),  the  Trustee  (or any other
successor  servicer) shall succeed to any rights and obligations of the Servicer
under any  Sub-Servicing  Agreement  and shall be  deemed  to have  assumed  the
Servicer's  interest  therein;  PROVIDED,  HOWEVER,  that the Servicer shall not
thereby be relieved of any liability or obligations  under this  Agreement,  any
Sub-Servicing  or substitute  servicing  agreement  arising prior to the date of
such succession.

           The Servicer shall,  upon request of the Trustee,  but at the expense
of the  Servicer,  deliver  to the  assuming  party all  documents  and  records
relating to the Mortgage Loans then being serviced  thereunder and an accounting
of amounts collected held by it and otherwise use its best efforts to effect the
orderly and efficient transfer of servicing to the assuming party.

SECTION 3.07    COLLECTION OF MORTGAGE LOAN PAYMENTS.

           The Servicer  shall make  reasonable  efforts to collect all payments
called for under the terms and  provisions of the Mortgage  Loans and shall,  to
the extent such procedures shall be consistent with this Agreement,  follow such
collection procedures as it follows with respect to mortgage loans comparable to
the  Mortgage  Loans held in its own  portfolio  and  serviced by the  Servicer.
Consistent with the foregoing,  the Servicer may in its discretion (a) waive any
late payment charge or any prepayment  charge or penalty  interest in connection
with the  prepayment of a Mortgage Loan and (b) only upon  determining  that the
coverage of such Mortgage Loan by

                                       44
<PAGE>

any related Primary Mortgage  Insurance Policy will not be affected,  extend the
due dates for payments due on a Mortgage  Note for a period not greater than 270
days,  but in no event beyond the maturity  date of any  Mortgage  Loan.  In the
event of any such arrangement described in clause (b) of the preceding sentence,
the  Servicer  shall  continue  to make timely  Monthly  Advances on the related
Mortgage Loan, pursuant to and in accordance with Section 5.01 of this Agreement
(but subject to any limitations contained therein),  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  establish and maintain,  in its name on behalf of
the  Certificateholders  [and the Insurer],  the Custodial Account. The Servicer
shall deposit into the Custodial  Account within two Business Days of receipt by
the Servicer, or receipt from the Sub-Servicers except as otherwise specifically
provided herein, the following  payments and collections  received or made by it
subsequent  to the  Cut-off  Date  (other  than in respect of  principal  of and
interest  and any other  payments  on the  Mortgage  Loans due on or before  the
Cut-off Date):

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

(ii)  all payments on account of interest on the Mortgage Loans;

(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, net of Liquidation Expenses, unpaid servicing compensation and
      unreimbursed Monthly Advances;

(iv)  all Monthly Advances made by the Servicer pursuant to Section 5.01 hereof;

(v)   any amount of any losses required to be deposited by the Servicer pursuant
      to the second succeeding paragraph of this Section 3.07 in connection with
      any losses on Eligible Investments;

(vi) any amounts  required to be deposited  by the Servicer  pursuant to Section
     3.11 hereof;

(vii) all  proceeds of any purchase by the Seller or the  Servicer,  as the case
      may be, of any  Mortgage  Loans or  property  acquired  in  respect of the
      Mortgage Loans pursuant to Sections 2.01,  2.02, 2.04, 3.12, 3.21 or 10.01
      hereof and all amounts  required to be  deposited in  connection  with the
      substitution of Replacement Mortgage Loans pursuant to Sections 2.01, 2.02
      or 2.04 hereof; and

(viii)any other  amounts  required  to be  deposited  in the  Custodial  Account
      pursuant to this  Agreement  including,  without  limitation,  the amounts
      required to be deposited therein pursuant to Section 3.13 hereof.

                                       45
<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  prepayment  penalties,  fees or
premiums, late payment charges,  assumption fees and any excess interest charges
payable by the Mortgagor by virtue of any default or other non-compliance by the
Mortgagor  with the terms of the  Mortgage or any other  instrument  or document
executed  in  connection  therewith  or  otherwise,  if  collected,  need not be
remitted or deposited into the Custodial  Account by the Servicer.  In the event
that the Servicer  shall remit or deposit any amount not required to be remitted
or deposited  and not otherwise  subject to withdrawal  pursuant to Section 3.09
hereof,  it may at any time withdraw  such amount from the Custodial  Account on
the  following   Distribution   Date,  any  provision  herein  to  the  contrary
notwithstanding.  Such direction may be  accomplished by delivering an Officers'
Certificate to the Trustee which describes the amounts deposited in error in the
Custodial Account. All funds deposited in the Custodial Account shall be held by
the  Servicer  in  trust  for the  Certificateholders  [and the  Insurer]  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 Custodial Account at the direction of the Servicer.

           The  Servicer  shall  invest  the funds in the  Custodial  Account in
Eligible Investments,  which shall mature not later than the second Business Day
preceding the  Distribution  Date following the date of such investment  (except
that if such  Eligible  Investment  is an  obligation  of the  institution  that
maintains the Custodial Account,  then such Eligible Investment shall mature not
later than such Distribution Date). All such Eligible  Investments shall be made
in the name of the Trustee for the benefit of the  Certificateholders  [[and the
Insurer]]  (in its capacity as such) or its nominee.  All income and gain net of
any losses  realized  from any such  investment  shall be for the benefit of the
Servicer and shall be subject to withdrawal at its direction  from time to time.
The amount of any losses net of any gains not paid to the  Servicer  incurred in
respect of any such investments shall be remitted to the Trustee or deposited in
the Custodial  Account out of the Servicer's  own funds  promptly  following the
date that same are realized.

           The Servicer  shall  promptly give notice to the Trustee,  the Rating
Agencies, the Insurer and the Depositor of the location of the Custodial Account
and of any change thereof.

SECTION 3.08    COLLECTION OF TAXES, ASSESSMENTS AND
                SIMILAR ITEMS; ESCROW ACCOUNTS.

           In addition to the Custodial  Account,  the Servicer shall  establish
and maintain one or more  custodial  accounts  (each,  an "Escrow  Account") and
deposit and retain therein all  collections  from the Mortgagors (or advances by
the  Servicer)  for the  payment  of taxes,  assessments  and  hazard  insurance
premiums or comparable items for the account of the Mortgagors.  Escrow Accounts
shall be Eligible Accounts.

           Withdrawals of amounts so collected  from the Escrow  Accounts may be
made only to effect  timely  payment  of taxes,  assessments,  hazard  insurance
premiums or Primary  Mortgage  Insurance  Policy  premiums,  condominium  or PUD
association  dues, or comparable  items,  to reimburse the Servicer  pursuant to
Sections 3.10 hereof (with respect to the Primary Mortgage Insurance Policy) and
3.08  hereof  (with  respect to taxes and  assessments)  and 3.11


                                       46
<PAGE>

hereof (with respect to hazard insurance),  to refund to any Mortgagors any sums
as may be determined to be overages, to pay interest, if required, 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 10.01 hereof. As
part of its servicing duties,  the Servicer shall, and the Sub-Servicers  shall,
pursuant to any Sub-Servicing  Agreement,  be required to, pay to the Mortgagors
interest on funds in the Escrow Account, to the extent required by law.

           The Servicer shall, with respect to each Mortgage Loan, to the extent
any related Sub-Servicer does not do so, advance the payments referred to in the
preceding  paragraph  that  are not  timely  paid by the  Mortgagors;  PROVIDED,
HOWEVER,  that the  Servicer  shall be required to so 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 of the related Mortgage Loan; and PROVIDED FURTHER, that such payments
shall be advanced when the tax,  premium or other cost for which such payment is
intended is due.

SECTION 3.09 PERMITTED WITHDRAWALS FROM THE CUSTODIAL ACCOUNT.

           The  Servicer  may (and,  with  respect to clauses (e) and (g) below,
shall),  from time to time,  direct the Trustee to make,  and the Trustee  shall
make,  to the extent  required or  authorized  hereunder,  withdrawals  from the
Custodial Account for the following purposes:

                (a) to pay to the Servicer as additional servicing compensation,
      earnings on or  investment  income with respect to funds in the  Custodial
      Account credited to the Custodial Account;

                (b) to reimburse  the Servicer  for  advances  made  pursuant to
      Sections  3.01,  3.10,   3.13,  5.01  and  5.02  hereof,   such  right  of
      reimbursement  pursuant  to this  subclause  (b) being  limited to amounts
      received in respect of the particular  Mortgage Loan (including,  for this
      purpose,  Insurance Proceeds,  Liquidation Proceeds,  amounts representing
      proceeds  of  other  insurance  policies,  if any,  covering  the  related
      Mortgaged Property, rental and other income from REO Property and proceeds
      of any purchase or repurchase of the related Mortgage Loan);

                (c)  to reimburse the Servicer for any Nonrecoverable Advances;

                (d) to reimburse  the  Servicer  from  Liquidation  Proceeds for
      Liquidation  Expenses and, to the extent that  Liquidation  Proceeds after
      such  reimbursement  are in excess of the Principal Balance of the related
      Mortgage Loan together with accrued and unpaid interest  thereon at a rate
      equal to the sum of the Net Mortgage Rate and the Trustee Fee Rate, to pay
      out of such excess the amount of any unpaid  servicing  compensation  with
      respect to the related  Mortgage Loan to the  Servicer,  which may include
      any unpaid servicing compensation to the Sub-Servicer (for disbursement in
      accordance with Section 3.16 hereof);

                (e) to pay to the  Seller or the  Servicer,  as the case may be,
      with respect to each Mortgage Loan or property acquired in respect thereof
      that has been  purchased  pursuant to Sections  2.01,  2.02,  2.04 or 3.12
      hereof  all  amounts  received  thereon  and not


                                       47
<PAGE>

     taken into account in determining  the Purchase  Price of such  repurchased
     Mortgage Loan;

               (f) to  reimburse  the  Servicer or the  Depositor  for  expenses
          incurred by and reimbursable to the Servicer or the Depositor pursuant
          to Section 7.03 hereof;

               (g) to withdraw  any amount  deposited in the  Custodial  Account
          pursuant to Section 3.07 and not required to be deposited therein; and

               (h) to clear and terminate the Custodial Account upon termination
          of this Agreement pursuant to Section 10.01 hereof.

           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 Custodial Account pursuant to such subclauses (a), (b), (c),
(d),  (e) and (f). The Servicer  may apply  Liquidation  Proceeds and  Insurance
Proceeds  received with respect to a particular  Mortgage Loan to reimbursements
permitted by clauses  (b), (c) and (d) above in any order as the Servicer  deems
appropriate.

           On or prior to the second  Business Day preceding  each  Distribution
Date after payment of items (a) through (h) above,  the Servicer  shall withdraw
from the Custodial  Account and remit to the Trustee,  in immediately  available
funds, and the Trustee,  upon receipt thereof,  shall deposit in the Certificate
Account,  an amount equal to the sum of the Available  Distribution  Amount, the
Trustee Fee, the Servicing Fee [and the Insurer]  Premium for such  Distribution
Date.

SECTION 3.10 MAINTENANCE OF PRIMARY  MORTGAGE  INSURANCE  POLICIES;  COLLECTIONS
THEREUNDER.

     The Servicer shall not take, or permit any Sub-Servicer to take, any action
that would  result in loss of coverage  under any  applicable  Primary  Mortgage
Insurance  Policy for any loss  which,  but for the  actions of the  Servicer or
Sub-Servicer,  would have been covered  thereunder.  The Servicer  shall use its
best  reasonable  efforts to cause such  Sub-Servicer  to keep in full force and
effect each Primary  Mortgage  Insurance  Policy  applicable  to a Mortgage Loan
being serviced by it, until the principal  balance of the related Mortgage Loan,
in the case of a Mortgage Loan having a  Loan-to-Value  Ratio at  origination in
excess of 80%, is reduced to (a) 80% or less of the  Appraised  Value or (b) 80%
or less of its current value based on a new  appraisal.  The Servicer  agrees to
pay to the extent the related Sub-Servicer does not do so, the premiums for each
Primary  Mortgage  Insurance  Policy  on a timely  basis  and shall use its best
reasonable  efforts  to cause  itself  or the  Sub-Servicer  to be named as loss
payee. In the event that the insurer under any Primary Mortgage Insurance Policy
shall cease to be qualified to transact a mortgage guaranty  insurance  business
under the laws of the state of its  organization  or any  other  state  that has
jurisdiction over such insurer (or if such insurer's claims-paying ability shall
adversely  affect  the  rating  on the  Class A  Certificates)  or such  Primary
Mortgage  Insurance  Policy is  cancelled  or  terminated  for any  reason,  the
Servicer shall exercise its best reasonable  efforts to obtain,  or to cause the
related  Sub-Servicer to obtain,  from another Qualified  Insurer, a replacement
policy  comparable to such Primary  Mortgage  Insurance Policy at the expense of
the

                                       48
<PAGE>

Mortgagor.  The  Servicer  shall not consent to the  cancellation  or refusal to
renew any such Primary  Mortgage  Insurance  Policy  applicable  to any Mortgage
Loan, which is in effect at the date of the initial issuance of the Certificates
and is required to be kept in force  hereunder  unless the  replacement  Primary
Mortgage Insurance Policy for such cancelled or non-renewed policy is maintained
with an insurer  with a rating not lower than the  insurer  issuing  the Primary
Mortgage  Insurance  Policy in effect at the date of the initial issuance of the
Certificates or whose  claims-paying will not adversely affect the rating on the
Class A  Certificates  or unless any such  cancellation  or refusal,  or consent
thereto,  will not adversely  affect the rating on the Class A Certificates.  In
connection with any assumption and  modification  agreement  entered into by the
Servicer or a Sub-Servicer pursuant to Section 3.12, the Servicer shall obtain a
replacement Primary Mortgage Insurance Policy, as provided above.

           In connection  with its activities as  administrator  and servicer of
the Mortgage  Loans,  the Servicer agrees to present,  on behalf of itself,  the
Depositor,  the  Trustee  for the  benefit  of the  Certificateholders  [and the
Insurer],  claims to the insurer under any Primary Mortgage  Insurance  Policies
and, in this  regard,  to take such  reasonable  action as shall be necessary to
permit  recovery  under  any  Primary  Mortgage  Insurance  Policies  respecting
defaulted Mortgage Loans. Pursuant to Section 3.07 hereof, any amounts collected
by the Servicer under any Primary  Mortgage  Insurance Policy shall be deposited
in the Custodial Account, subject to withdrawal pursuant to Section 3.09 hereof.

SECTION 3.11 MAINTENANCE OF HAZARD INSURANCE AND OTHER INSURANCE.

           The Servicer  shall cause to be maintained  for each  Mortgage  Loan,
hazard  insurance with extended  coverage in an amount that is at least equal to
the maximum  insurable value of improvements  securing such Mortgage Loan or its
Principal Balance, whichever is less.

           Each policy of standard hazard  insurance  shall contain,  or have an
accompanying endorsement that contains, a standard mortgagee clause complying in
all material  respects in form and substance to applicable FNMA guidelines.  The
Servicer shall cause to be maintained on property  acquired upon  foreclosure or
deed in lieu of foreclosure of any Mortgage  Loan,  liability  insurance and, to
the extent  described below,  flood insurance.  Pursuant to Section 3.07 hereof,
any  amounts  collected  by the  Servicer  under any such  policies  (other than
amounts to be  applied to the  restoration  or repair of the  related  Mortgaged
Property  or property  thus  acquired or amounts  released to the  Mortgagor  in
accordance  with the terms of the applicable  Mortgage or the Servicer's  normal
servicing  procedures) shall be deposited in the Custodial  Account,  subject to
withdrawal pursuant to Section 3.09 hereof.

           Any cost  incurred by the  Servicer or the  related  Sub-Servicer  in
maintaining any such insurance shall not, for the purpose of calculating monthly
distributions to the  Certificateholders or remittances to the Trustee for their
benefit, be added to the Principal Balance of the Mortgage Loan, notwithstanding
that the terms of the Mortgage Loan so permit.  Such costs shall be  recoverable
by the  Servicer  out of payments by the related  Mortgagor  or out of Insurance
Proceeds or Liquidation Proceeds to the extent permitted by Section 3.09 hereof.
If the Mortgaged  Property is located at the time of origination of the Mortgage
Loan in a federally  designated  special flood hazard area,  the Servicer  shall
cause flood  insurance to be  maintained.  Such flood  insurance  shall be in an
amount  equal to the lesser of (i) the unpaid  Principal  Balance



                                       49
<PAGE>

of the  related  Mortgage  Loan or (ii) the  maximum  amount  of such  insurance
available for the related Mortgaged  Property under the national flood insurance
program,   if  the  area  in  which  such  Mortgaged   Property  is  located  is
participating in such program.

           In the event that the  Servicer  shall  obtain and maintain a blanket
policy  insuring  against hazard losses on all of the Mortgage  Loans,  it shall
conclusively  be deemed to have  satisfied its  obligations  as set forth in the
first  sentence of this Section 3.11, it being  understood  and agreed that such
policy may contain a  deductible  clause on terms  substantially  equivalent  to
those  commercially  available  and  maintained  by  comparable  servicers,  and
provided that the provider of such blanket  policy is rated by A.M. Best Company
A:V or higher and the claims-paying  ability of such provider is rated in one of
the  three  highest  rating  categories  by at least one  nationally  recognized
statistical  rating  organization.  If such policy contains a deductible clause,
the Servicer  shall,  to the extent that there shall not have been maintained on
the related  Mortgaged  Property a policy  complying  with the first sentence of
this  Section 3.11 and there shall have been a loss that would have been covered
by such policy,  remit to the Trustee for deposit in the  Custodial  Account the
amount not otherwise payable under the blanket policy because of such deductible
clause,  accompanied by an Officers'  Certificate  describing the calculation of
such amount.  In connection with its activities as administrator and servicer of
the Mortgage  Loans,  the Servicer agrees to present,  on behalf of itself,  the
Depositor,  the Trustee for the benefit of the Certificateholders,  claims under
any such blanket policy.

SECTION 3.12 ENFORCEMENT OF DUE-ON-SALE CLAUSES; ASSUMPTION AGREEMENTS.

     (a) Except as otherwise provided in this Section 3.12(a), when any property
subject to a Mortgage has been conveyed by the Mortgagor, the Servicer shall, to
the extent that it has  knowledge of such  conveyance,  enforce any  due-on-sale
clause contained in any Mortgage Note or Mortgage, to the extent permitted under
applicable law and  governmental  regulations,  but only to the extent that such
enforcement will not adversely affect or jeopardize  coverage under any Required
Insurance Policy. In the event that the Servicer or the related  Sub-Servicer is
prohibited by law from  enforcing any such  due-on-sale  clause,  or if coverage
under any Required Insurance Policy would be adversely affected, the Servicer is
authorized,  subject to Section 3.12(b), to take or enter into an assumption and
modification agreement from or with the person to whom such property has been or
is about to be conveyed,  pursuant to which such person becomes liable under the
Mortgage Note and,  unless  prohibited  by  applicable  state law, the Mortgagor
remains  liable  thereon,  provided that the Mortgage Loan shall  continue to be
covered  (if so covered  before  the  Servicer  enters  such  agreement)  by the
applicable  Required  Insurance  Policies.  The  Servicer,  subject  to  Section
3.12(b),  is also  authorized  with the prior approval of the insurers under any
Required Insurance Policies to enter into a substitution of liability  agreement
with such  person,  pursuant to which the original  Mortgagor  is released  from
liability and such person is  substituted  as Mortgagor and becomes liable under
the Mortgage  Note.  Notwithstanding  the  foregoing,  the Servicer shall not be
deemed to be in default under this Section  3.12(a) by reason of any transfer or
assumption  which the Servicer is  restricted  by law from  preventing,  for any
reason whatsoever.

     (b) Subject to the Servicer's duty to enforce any due-on-sale clause to the
extent set forth in Section  3.12(a)  hereof,  in any case in which a  Mortgaged
Property  has been

                                       50
<PAGE>

conveyed to a Person by a Mortgagor, if an assumption is permitted under Section
3.12(a) and such Person is to enter into an assumption agreement or modification
agreement or supplement to the Mortgage Note or Mortgage held for the benefit of
the  Certificateholders  [and the Insurer]  that  requires the  signature of the
Trustee,  or if an  instrument  of release  signed by the  Trustee  is  required
releasing the Mortgagor  from liability on the Mortgage Loan, the Servicer shall
deliver or cause to be delivered  to the Trustee for  signature  the  assumption
agreement  with the Person to whom the Mortgaged  Property is to be conveyed and
such  modification  agreement or  supplement to the Mortgage Note or Mortgage or
other  instruments  as are reasonable or necessary to carry out the terms of the
Mortgage  Note or  Mortgage or  otherwise  to comply  with any  applicable  laws
regarding  assumptions or the transfer of the Mortgaged Property to such Person.
The Servicer shall also deliver or cause to be delivered to the Trustee with the
foregoing  documents a letter  explaining  the nature of such  documents and the
reason or reasons why the Trustee's signature is required.

           With  such  letter,  the  Servicer  shall  deliver  to the  Trustee a
certificate of a Servicing Officer  certifying that: (i) a Servicing Officer has
examined  and  approved  such  documents  as to form  and  substance,  (ii)  the
Trustee's  execution and delivery  thereof will not conflict with or violate any
terms of this Agreement or cause the unpaid balance and interest on the Mortgage
Loan to be  uncollectible  in whole or in part,  (iii) any required  consents of
insurers  under any  Required  Insurance  Policies  have been  obtained and (iv)
subsequent  to the  closing  of the  transaction  involving  the  assumption  or
transfer (A) the Mortgage Loan will  continue to be secured by a first  mortgage
lien  pursuant  to the  terms of the  Mortgage,  (B) such  transaction  will not
adversely  affect the coverage under any Required  Insurance  Policies,  (C) the
Mortgage Loan will fully  amortize  over the  remaining  term thereof or, if the
Mortgage  Loan  provided  that the  amortization  period  on which  the  Monthly
Payments were based was a longer period, such period has not been extended,  (D)
the interest  rate on the Mortgage Loan will not be altered nor will the term of
the Mortgage  Loan be increased as a result of such  assumption  or transfer and
(E) if the  seller/transferor  of the Mortgaged  Property is to be released from
liability  on the  Mortgage  Loan,  the  Servicer  used  the  same  underwriting
standards in evaluating the creditworthiness of the purchaser/transferee as were
used in making the original  Mortgage  Loan, and such release will not (based on
the Servicer's good faith determination)  adversely affect the collectibility of
the Mortgage Loan. Upon receipt of such certificate, the Trustee for the benefit
of  the  Certificateholders  [and  the  Insurer]  shall  execute  any  necessary
instruments for such  assumption or substitution of liability.  Upon the closing
of the transactions contemplated by such documents, the Servicer shall cause the
originals of the assumption agreement, the release (if any), or the modification
or  supplement  to the Mortgage  Note or Mortgage to be delivered to the Trustee
for the benefit of the  Certificateholders  [and the Insurer] and deposited with
the Trustee  Mortgage  File for such  Mortgage  Loan.  Any fee  collected by the
Servicer for entering into an assumption or substitution of liability  agreement
will be retained by the Servicer as additional servicing compensation.

           In  the  event  that  the  Servicer,  in  connection  with  any  such
assumption or  modification  agreement or  supplement  to the Mortgage  Note, is
unable to deliver the certificate of the Servicing  Officer set forth above, the
Servicer  shall  purchase,  or cause the related  Sub-Servicer  to purchase  the
related  Mortgage Loan in the manner,  and at the Purchase  Price,  set forth in
Section 2.04 hereof.

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<PAGE>

SECTION 3.13 REALIZATION UPON DEFAULTED MORTGAGE LOANS.

           The Servicer shall foreclose upon or otherwise comparably convert the
ownership of  properties  securing  such of the Mortgage  Loans as come into and
continue in default and as to which, in the reasonable judgment of the Servicer,
no satisfactory  arrangements can, in accordance with prudent lending practices,
be made for collection of delinquent  payments  pursuant to Section 3.01 hereof.
In connection  with such  foreclosure  or other  conversion,  the Servicer shall
follow such practices and procedures as it shall deem necessary or advisable, as
shall be normal and usual in its general mortgage  servicing  activities and for
its own portfolio and as are in accordance with the  requirements of the insurer
under  any  Required  Insurance  Policy  and  shall  deliver  to the  Insurer  a
liquidation  report  with  respect to the related  Mortgage  Loan on the form of
report customarily prepared by the Servicer.  The Servicer shall not be required
to expend  its own funds in  connection  with any  foreclosure  or  towards  the
restoration,  repair,  protection or maintenance of any property unless it shall
determine in its sole discretion that such expenses will be recoverable to it as
Liquidation  Expenses either through Liquidation  Proceeds  (respecting which it
shall have  priority  for purposes of  withdrawals  from the  Custodial  Account
pursuant to Section 3.09 hereof) or through Insurance Proceeds (respecting which
it shall have similar priority). The Servicer shall be responsible for all other
costs and expenses  incurred by it in any such proceedings;  PROVIDED,  HOWEVER,
that it shall  be  entitled  to  reimbursement  thereof  from  the  proceeds  of
liquidation of the related Mortgaged  Property,  as contemplated in Section 3.09
hereof.

           In the event that any Mortgaged Property becomes an REO Property, the
deed or  certificate  of sale shall be taken in the name of the  Trustee for the
benefit of the  Certificateholders  [and the Insurer], or its nominee, on behalf
of the  Certificateholders  [and the  Insurer].  Pursuant to its efforts to sell
such REO Property, the Servicer shall either itself or through an agent selected
by the Servicer protect and conserve such REO Property in the same manner and to
such extent as is customary  in the locality  where such REO Property is located
and may,  incident to its  conservation  and  protection of the interests of the
Certificateholders [and the Insurer], rent the same, or any part thereof, as the
Servicer  deems to be in the best interest of the Servicer,  the Insurer and the
Certificateholders for the period prior to the sale of such REO Property on such
terms and  conditions  and for such periods as the  Servicer  deems to be in the
best interest of the Servicer, the Insurer and the Certificateholders.

           The decision of the  Servicer to  foreclose  on a defaulted  Mortgage
Loan shall be subject to a  determination  by the Servicer  that the proceeds of
such  foreclosure  would  exceed  the  costs and  expenses  of  bringing  such a
proceeding.  The income earned from the  management of any Mortgaged  Properties
acquired  through  foreclosure  or other  judicial  proceeding  on behalf of the
Certificateholders  [and the Insurer],  net of reimbursement to the Servicer for
expenses  incurred  (including  any taxes) in connection  with such  management,
advances made by the Servicer  pursuant to Sections 3.01,  3.11, 3.13 or 5.01 in
connection  with the  related  Mortgage  Loan or REO  Property  and  Liquidation
Expenses  incurred by the Servicer in connection with the related Mortgage Loan,
shall be applied to the  payment of  principal  of and  interest  on the related
defaulted  Mortgage  Loans (with interest  accruing and principal  amortizing as
though such  Mortgage  Loans were still  current)  and all such income  shall be
deemed,  for all  purposes  in this  Agreement,  to be  payments  on  account of
principal of and interest on the related  Mortgage  Notes and shall be deposited
into the Custodial Account.

                                       52
<PAGE>

           Prior to  obtaining  or  causing  the  Trustee  to obtain a deed as a
result of or in lieu of  foreclosure,  or  otherwise  acquiring  (or causing the
Trustee to acquire)  possession  of or title to any Mortgaged  Property,  if the
Servicer  determines  that  obtaining  a deed or  otherwise  acquiring  title or
possession of such Mortgaged  Property  would likely  subject the Servicer,  the
Trustee or the Trust Fund to substantial  liability in respect of  environmental
conditions concerning the Mortgaged Property,  (a) the Servicer shall (i) notify
the  Trustee and the  Depositor  of such  determination  and (ii)  refrain  from
obtaining or directing the Trustee to obtain a deed as a result of or in lieu of
foreclosure  or  otherwise  acquiring  title  or  possession  to such  Mortgaged
Property and (b) the  obligations of the Servicer to make  advances,  including,
without  limitation,  Monthly Advances,  in connection with the Mortgage Loan in
question shall cease as of the date that the Servicer makes such determination.

SECTION 3.14 TRUSTEE TO COOPERATE; RELEASE OF TRUSTEE MORTGAGE FILES.

           Upon the payment in full of any Mortgage  Loan, or the receipt by the
Servicer  of a  notification  that  payment in full will be escrowed in a manner
customary for such purposes,  and upon  notification by the Servicer in the form
of a certification  (which certification shall include a statement to the effect
that all amounts  received or to be received  in  connection  with such  payment
which are required to be deposited in the Custodial Account have been or will be
so  deposited)  of a Servicing  Officer and a Request for Release of the Trustee
Mortgage File in the form of Exhibit G hereto the Trustee shall promptly release
the related Trustee Mortgage File to the Servicer, and the Trustee shall execute
and deliver to the Servicer the request for  reconveyance,  deed of reconveyance
or release,  satisfaction or assignment of mortgage or such instrument releasing
the lien of the Mortgage, and, in each case, such other documents or instruments
as may be  reasonably  required  in  connection  therewith,  as  directed by the
Servicer,  together with the Mortgage Note with written evidence of cancellation
thereon. The provisions of the immediately  preceding sentence shall not, in any
manner,  limit or impair the right of the  Servicer to execute and  deliver,  on
behalf of the Trustee, the Depositor, the Certificateholders or any of them, any
and all instruments of satisfaction,  cancellation or assignment,  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.  No expenses incurred in connection with any
instrument of satisfaction  or deed of  reconveyance  shall be chargeable to the
Certificate Account but shall be paid by the Servicer.  From time to time and as
shall be  appropriate  for the servicing or  foreclosure  of any Mortgage  Loan,
including,  without limitation, for such purpose, collection under any policy of
flood  insurance,  any fidelity bond or errors or omissions  policy,  or for the
purposes of effecting a partial or total release of any Mortgaged  Property from
the lien of the Mortgage or the making of any  corrections  to the Mortgage Note
or the Mortgage or any of the other documents  included in the Trustee  Mortgage
File,  the Trustee  shall,  upon request of the Servicer and the delivery to the
Trustee of a Request for Release signed by a Servicing  Officer,  in the form of
Exhibit G hereto,  release the Trustee  Mortgage  File to the  Servicer.  If the
Servicer at any time seeks to initiate a  foreclosure  proceeding  in respect of
any  Mortgaged  Property,  the Servicer  shall  deliver to the  Depositor or the
Trustee,  for  signature  as  appropriate,  any court  pleadings,  requests  for
trustee's sale or other documents  necessary to effectuate  such  foreclosure or
any legal  action  brought  to obtain  judgment  against  the  Mortgagor  on the
Mortgage  Note or the Mortgage or to obtain a deficiency  judgment or to enforce
any other  remedies or rights  provided by the Mortgage  Note or the Mortgage or
otherwise  available  at law or in  equity,  together  with a  certificate  of a
Servicing

                                       53
<PAGE>
Officer  requesting that such pleadings or documents be executed by the Trustee.
A Servicing  Officer shall certify as to the reason such  documents or pleadings
are required and that the execution and delivery thereof by the Trustee will not
invalidate  the  insurance  coverage  under  any  Required  Insurance  Policy or
invalidate  or  otherwise  affect  the  lien  of the  Mortgage  except  for  the
termination of such lien upon completion of the foreclosure.

SECTION 3.15  DOCUMENTS,  RECORDS AND FUNDS IN POSSESSION OF SERVICER TO BE HELD
FOR THE DEPOSITOR AND THE TRUSTEE FOR THE BENEFIT OF THE CERTIFICATEHOLDERS.

           Notwithstanding any other provisions of this Agreement,  the Servicer
shall  transmit to the  Trustee to the extent  required  by this  Agreement  all
documents and  instruments  coming into the possession of the Servicer from time
to  time  and  shall  account  fully  to the  Trustee  for  the  benefit  of the
Certificateholders  [and the Insurer] for any funds  received by the Servicer or
which  otherwise  are  collected  by the  Servicer  as  Liquidation  Proceeds or
Insurance  Proceeds in respect of any Mortgage Loan. All Servicer Mortgage Files
or Trustee  Mortgage Files and funds  collected or held by, or under the control
of, the Servicer in respect of any Mortgage  Loans,  whether from the collection
of principal  and interest  payments or from  Liquidation  Proceeds or Insurance
Proceeds,  including  but not limited to, any funds on deposit in the  Custodial
Account,  shall be held by the Servicer for and on behalf of the Depositor,  the
Trustee for the benefit of the Certificateholders [and the Insurer] and shall be
and  remain  the sole and  exclusive  property  of the  Trustee,  subject to the
applicable provisions of this Agreement.  The Servicer also agrees that it shall
not create, incur or subject any Servicer Mortgage File or Trustee Mortgage File
or any funds that are  deposited in the  Custodial  Account or any  Servicing or
Escrow Account,  or any funds that otherwise are or may become due or payable to
the  Trustee  for the  benefit of the  Certificateholders,  to any claim,  lien,
security interest,  judgment, levy, writ of attachment or other encumbrance,  or
assert by legal  action or  otherwise  any claim or right of setoff  against any
Servicer Mortgage File or Trustee Mortgage File or any funds collected on, or in
connection with, a Mortgage Loan,  except,  however,  that the Servicer shall be
entitled to set off against and deduct from any such funds any amounts  that are
properly due and payable to the  Servicer  under this  Agreement  subject to the
terms of this Agreement.

SECTION 3.16 SERVICING COMPENSATION.

           As compensation for its activities  hereunder,  the Servicer shall be
entitled to retain from the  Custodial  Account or withdraw  from the  Custodial
Account the amounts specified in subclause (a) of Section 3.09 hereof as payable
to it.

           Additional   servicing   compensation   in  the  form  of  prepayment
penalties,  fees or premiums,  assumption fees,  modification fees, late payment
charges or otherwise or any excess interest  charges payable by the Mortgagor by
virtue of any default or other non-compliance by the Mortgagor with the terms of
the  Mortgage  or any  other  instrument  or  document  executed  in  connection
therewith  or  otherwise  shall be  retained  by the  Servicer to the extent not
required to be  deposited  in the  Custodial  Account  pursuant to Section  3.07
hereof.  The Servicer  shall be required to pay all  expenses  incurred by it in
connection  with  its  servicing  activities  hereunder  (including  payment  of
premiums for Primary Mortgage  Insurance  Policies,  to the extent such premiums
are not  required to be paid or have not been paid by the related  Mortgagor  or
the

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<PAGE>

related Sub-Servicer,  payment of any premiums for hazard insurance, as required
by Section 3.11 hereof and maintenance of the other forms of insurance  coverage
required by Section 3.11 hereof) the payment of  servicing  compensation  to any
Sub-Servicers  pursuant to any  Sub-Servicing  Agreement  and the payment of the
expenses of the Trustee to the extent provided in Section 9.05, and shall not be
entitled to reimbursement  therefor except as specifically  provided in Sections
3.09, 3.13 and 5.03 hereof.

SECTION 3.17 REPORTS TO THE DEPOSITOR; ACCOUNT STATEMENTS.

           Within five Business  Days  following  each  Distribution  Date,  the
Servicer shall deliver to the Trustee, the Insurer and the Depositor a statement
setting  forth the status of the Custodial  Account,  if any, as of the close of
business  on such  Distribution  Date  showing,  for the period  covered by such
statement,  the  aggregate  of deposits  in or  withdrawals  from the  Custodial
Account,  if any, for each category of deposit  specified in Section 3.07 hereof
and each category of withdrawal  specified in Section 3.09 hereof.  The Servicer
shall  forward a copy of such  statement  to the  Rating  Agencies.  Within  ten
Business Days following each Distribution Date, the Trustee shall deliver to the
Depositor  [and the  Insurer]  a  statement  setting  forth  the  status  of the
Certificate  Account  as of the  close of  business  on such  Distribution  Date
showing, for the period covered by such statement,  the aggregate of deposits in
or withdrawals from the Certificate Account. The Trustee shall forward a copy of
such statement to the Rating Agencies.

SECTION 3.18 ANNUAL STATEMENT AS TO COMPLIANCE.

           The  Servicer  shall  deliver to the  Depositor,  the Insurer and the
Trustee on or before January 31 of each year,  commencing  January 31, [200_] an
Officers'  Certificate stating, as to each signer thereof,  that (a) a review of
the activities of the Servicer during the year ended on the preceding  September
30 and of the  performance  of the Servicer  under this  Agreement has been made
under such officer's  supervision,  (b) to the best of such officer's knowledge,
based on such review,  the Servicer has fulfilled all its obligations under this
Agreement in all material respects throughout such year, or, if there has been a
default in the fulfillment of any such obligation,  specifying each such default
known to such officer and the nature and status thereof, (c) a Servicing Officer
has conducted an examination of the activities of each  Sub-Servicer  during the
immediately   preceding  year  and  its  performance   under  any  Sub-Servicing
Agreement,  and (d) to the best of such Servicing Officer's knowledge,  based on
such  examination,  each  Sub-Servicer  has  performed and fulfilled its duties,
responsibilities  and  obligations  under such  Sub-Servicing  Agreement  in all
material  respects  throughout  such year, or if there has been a default in the
performance or fulfillment of any such duties,  responsibilities or obligations,
specifying each such default known to such Servicing  Officer and the nature and
status thereof.  The Servicer shall forward a copy of each such statement to the
Rating Agencies.

SECTION 3.19 ANNUAL INDEPENDENT PUBLIC ACCOUNTANTS' SERVICING REPORT.

           On or  before  January  31 of each  year,  beginning  with the  first
January 31 that occurs at least six months after the Cut-off Date, the Servicer,
at its expense,  shall cause a firm of  independent  public  accounts  that is a
member of the American  Institute of Certified  Public  Accountants to furnish a
statement to the  Depositor,  the Insurer and the Trustee for the benefit of the
Certificateholders  to the effect that such firm has examined certain  documents
substantially

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<PAGE>

similar to this  Agreement  and records  relating to the  servicing  of mortgage
loans serviced by the Servicer or any successor  servicer that are substantially
similar to the Mortgage Loans and that, on the basis of an examination conducted
substantially  in compliance  with the Uniform Single Audit Program for Mortgage
Bankers or the Audit Program for Mortgages  serviced for FHLMC,  such  servicing
has  been  conducted  in  compliance  with  such  agreements   except  for  such
significant  exceptions  or errors in records that, in the opinion of such firm,
the Uniform  Single Audit Program for Mortgage  Bankers or the Audit Program for
Mortgages  serviced for FHLMC requires it to report. In rendering such statement
such firm may rely, as to matters relating to direct servicing of Mortgage Loans
by Sub-Servicers,  if any, upon comparable statements for examinations conducted
substantially  in compliance  with the Uniform Single Audit Program for Mortgage
Bankers or the Audit Program for Mortgages  serviced for FHLMC (rendered  within
one year of such  statement) of independent  public accounts with respect to the
related  Sub-Servicer.  The Servicer shall forward a copy of each such report to
the Rating Agencies.

SECTION 3.20 REPORTS TO TRUSTEE.

           On or before the third Business Day prior to each Distribution  Date,
the Servicer shall deliver to the Trustee [and the Insurer] a monthly  Servicing
Report  containing the information set forth in Section 4.04(a) and the Servicer
shall notify the Trustee of the Deficiency  Amount, if any, with respect to such
Distribution Date. The Trustee may conclusively rely on information  provided by
the Servicer and shall have no obligation to recompute,  recalculate,  or verify
the accuracy of such information.

SECTION 3.21    CONVERTED MORTGAGE LOANS; CERTAIN PROCEDURES AND PURCHASES.

     (a) The Trustee,  as Note Holder (as defined in the Mortgage  Notes for the
Mortgage Loans) on behalf of the Certificateholders  [and the Insurer] is hereby
authorized and hereby authorizes and directs the Servicer, on behalf of the Note
Holder,   to  determine  fixed  interest  rates  into  which   Mortgagors  under
Convertible  Mortgage Loans may convert the  adjustable  interest rates on their
Mortgage  Notes in accordance  with the terms set forth in such Mortgage  Notes.
The Servicer  agrees to make such  determinations  and otherwise  administer the
program  contemplated in the Mortgage Notes for the  Convertible  Mortgage Loans
until the later to occur of (i) the date on which all the  Convertible  Mortgage
Loans have  become  Converted  Mortgage  Loans,  and (ii) the last date on which
Mortgagors  have the option to convert the  adjustable  interest  rates on their
Mortgage Notes to fixed interest rates.

     (b) The Servicer  may, but is not obligated  to,  purchase such  Converting
Mortgage Loan. All amounts paid by the Servicer in connection  with the purchase
of a Converting  Mortgage Loan or Converted  Mortgage  Loan, as the case may be,
will be deposited in the Custodial  Account.  No party to this  Agreement or any
successor to any party shall be required to purchase any Converted or Converting
Mortgage Loan.

     (c) Notwithstanding that a Mortgage Loan becomes a Converting Mortgage Loan
or  Converted  Mortgage  Loan in any month,  such  Converting  Mortgage  Loan or
Converted  Mortgage  Loan  shall  remain in the Trust Fund and all  payments  in
respect thereof shall remain in

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<PAGE>

the Trust Fund  unless  and until such  Converting  Mortgage  Loan or  Converted
Mortgage  Loan,  as the case may be, is purchased by the  Servicer,  pursuant to
Section 3.21(b).

     (d) Upon any purchase of a Converting  Mortgage Loan or Converted  Mortgage
Loan,  as the case may be, by the Servicer  pursuant to Section  3.21(b) and the
deposit in the Custodial  Account of the Purchase Price, the Servicer shall give
the Trustee  written  notice  thereof  and,  based  thereon,  the Trustee  shall
release, or cause any Custodian to release, the related Mortgage File and convey
such Mortgage Loan to the purchaser  whereupon such purchased Converted Mortgage
Loan shall cease to be part of the Trust Fund.

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<PAGE>

                                   ARTICLE IV

                  PAYMENTS AND STATEMENTS TO CERTIFICATEHOLDERS

SECTION 4.01 CERTIFICATE ACCOUNT.

           The Trustee shall  establish,  prior to the Delivery  Date, and shall
maintain,  in the name of the Trustee on behalf of the Holders of  interests  in
the Trust Fund, the  Certificate  Account,  which shall be an Eligible  Account,
into which the Trustee upon receipt from the Servicer shall deposit all payments
remitted  by the  Servicer  and  any  amounts  required  to be  remitted  by the
Depositor  pursuant to the terms hereof.  All distributions to be made from time
to  time  to  Holders  of  interests  in the  Trust  Fund  out of  funds  in the
Certificate  Account  shall be made by or on behalf of the Trustee.  The Trustee
will give  notice to the  Servicer,  the Rating  Agencies,  the  Insurer and the
Depositor of the location of the Certificate  Account and of any change thereof,
prior to the use thereof. Funds held in the Certificate Account and delivered to
the Trustee  earlier than one Business Day prior to the next  Distribution  Date
shall be  invested by the  Trustee in  Eligible  Investments  as directed by the
Servicer  or shall  remain  uninvested.  All  income  and gain net of any losses
realized from any such  investment  shall be for the benefit of the Servicer and
shall be subject to withdrawal at the  Servicer's  direction  from time to time.
The amount of any losses net of any gains not paid to the  Servicer  incurred in
respect of any such  investments  shall be deposited in the Certificate  Account
out of the Servicer's own funds immediately as realized.

           In addition,  the Trustee shall  withdraw from the Insurance  Account
and  deposit  into the  Certificate  Account  the amount  necessary  to make the
Insured  Payment  on each  Distribution  Date to the  extent  received  from the
Insurer.

           The  Trustee  shall  make,  to  the  extent  required  or  authorized
hereunder, withdrawals from the Certificate Account for the following purposes:

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

          (ii) to reimburse  the Servicer  for any  unreimbursed  Nonrecoverable
               Advance;

          (iii) to make required distributions pursuant to Section 4.02; and

          (iv) to pay to the  Depositor  any  amount  to  which  it is  entitled
               pursuant to Section 7.03.

SECTION 4.02 DISTRIBUTIONS.

     (a) On each  Distribution  Date,  the following  amounts,  in the following
order of priority, shall be distributed by REMIC I to REMIC II on account of the
REMIC I  Regular  Interests  or  withdrawn  from  the  Certificate  Account  and
distributed to the holders of the Class R-I Certificates, as the case may be:

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<PAGE>

           (i) to the Holders of REMIC Regular Interests,  in an amount equal to
           (A) the Uncertificated  Interest for such Distribution Date, plus (B)
           any  amounts  in  respect  thereof  remaining  unpaid  from  previous
           Distribution Dates; and

           (ii) on each  Distribution  Date,  to the  Holders of REMIC I Regular
           Interests,  in an  amount  equal to the  remainder  of the  Available
           Distribution   Amount   for  such   Distribution   Date   after   the
           distributions made pursuant to clause (i) above, allocated as follows
           (except as provided below):

                (x)  first,  to the  Holders  of the REMIC I  Regular  Interests
                [____],  REMIC I Regular  Interests  [____]  and REMIC I Regular
                Interests  [____],  respectively,  the  Class  [____]  Principal
                Distribution  Amount,  the Class [____]  Principal  Distribution
                Amount, and the Class [____] Principal  Distribution Amount from
                such remainder;

                (y)  second,  to the  Holders  of the REMIC I Regular  Interests
                [____], any remaining portion of such remainder.

     (b) On each  Distribution  Date the  Trustee  shall  apply  amounts  in the
Certificate  Account  plus the Insured  Payment,  if any,  transferred  from the
Insurance  Account and payable to the Class A  Certificateholders  in accordance
with  Section  4.06,  to pay the  following  amounts in the  following  order of
priority:

          (i)  [to pay to the Insurer, the Insurer Premium];

          (ii) to pay to itself on each Distribution Date an amount equal to the
               Principal  Balance of each Mortgage Loan  immediately  prior such
               Distribution  Date  multiplied by  one-twelfth of the Trustee Fee
               Rate;

          (iii)to pay to the Servicer,  on any Distribution  Date, the Servicing
               Fee due on such  Distribution  Date, if the Servicer has remitted
               prior to the  related  Distribution  Date funds  directly  to the
               Trustee for deposit in the Certificate Account;

          (iv) [to  pay  to the  Insurer  the  amount  of  Cumulative  Insurance
               Payments as of such Distribution Date];

          (v)  to the holders of the Class A Certificates,  the Class A Interest
               Distribution Amount and the Class A Cumulative Interest Shortfall
               Amount for which no Insured  Payment has been  previously paid to
               the Class A Certificateholders;

          (vi) to the holders of the Class A Certificates,  to the extent of the
               Available  Distribution  Amount remaining,  the Class A Principal
               Distribution Amount; and

          (vii)to the holders of the Class S Certificates,  to the extent of the
               Available  Distribution  Amount  remaining,  the Class S Interest
               Distribution Amount and the Class S Cumulative Interest Shortfall
               Amount; and

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<PAGE>


          (viii) to the holders of the Class R-II Certificates,  the balance, if
               any, of the Available Distribution Amount.

     (c) Within five Business  Days before the related  Distribution  Date,  the
Servicer shall notify the Trustee of the amounts, if any, payable to the Insurer
pursuant to Sections 4.02(b)(iv).

     (d) The Servicer shall be responsible for the calculations  with respect to
distributions  from the  Certificate  Account  so long as the Trust Fund has not
been  terminated in accordance with this Agreement.  All  distributions  made to
Certificateholders  of any Class on such  Distribution  Date will be made to the
Certificateholders  of  the  respective  Class  of  record  on  the  immediately
preceding Record Date, except for the final distribution, which shall be made as
provided  in  the  form  of   Certificate.   All   distributions   made  to  the
Certificateholders  shall be based upon the Percentage  Interest  represented by
their  respective  Certificates.  If on  any  Determination  Date,  the  Trustee
determines  that there are no Mortgage Loans  outstanding  and no other funds or
assets in the Trust Fund other than the funds in the  Certificate  Account,  the
Trustee   shall   promptly   send  the   final   distribution   notice  to  each
Certificateholder  specifying the manner in which the final distribution will be
made.

     (e) Any  Certificateholder  shall  be  entitled  to  receive  distributions
hereunder  on a  Distribution  Date (other  than as  provided  in Section  10.02
respecting the final  distribution) by wire transfer to the account specified in
writing  by the  Certificateholder  to the  Trustee if the  Initial  Certificate
Principal  Balance  evidenced by such Holder's  Certificate is at least equal to
$2,500,000 or the Percentage Interest thereof is 100%. In each case, the account
must be  specified  in writing at least five  Business  Days prior to the Record
Date for the Distribution Date on which wire transfers will commence.  All other
distributions shall be made by check payable to the Certificateholder  mailed by
first  class mail to the  address  of such  Certificateholder  reflected  in the
Certificate Register.

SECTION 4.03 ALLOCATION OF REALIZED LOSSES.

           Prior to each  Distribution  Date, the Servicer  shall  determine the
total of Realized  Losses,  if any,  incurred with respect to the Mortgage Loans
during the previous  Prepayment  Period.  On each  Distribution  Date,  Realized
Losses will be allocated  after the  distribution  of principal  and interest on
such Distribution Date;  PROVIDED,  HOWEVER,  that if the Certificate  Principal
Balance  of any Class of  Certificates  would be  reduced to zero as a result of
Realized  Losses to be  allocated  on such  Distribution  Date if no funds  were
available for  distributions on the  Certificates,  then Realized Losses will be
allocated to such Class prior to the distribution of principal and interest.  In
every case, such Realized Losses shall be allocated as follows:

     (a) first,  by  application  of clause  (vi) of the  definition  of Class A
Principal  Distribution Amount, to the Class S Interest  Distribution Amount for
the  related  Distribution  Date;  second,  to any Class S  Cumulative  Interest
Shortfall Amount;  and third, to the Class A Certificates.  All such allocations
to a Class of  Certificates  shall be on a pro rata basis in accordance with the
shortfall amount or distribution amount, as applicable,  for each Certificate of
such Class.

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<PAGE>

     (b) All  Realized  Losses on the  Mortgage  Loans shall be allocated to the
REMIC I Regular  Interests in accordance with the definition of REMIC I Realized
Losses.

SECTION 4.04 MONTHLY STATEMENTS TO CERTIFICATEHOLDERS.

     (a) Not later than each  Distribution  Date, the Servicer shall prepare and
the Trustee shall cause to be forwarded by mail to each  Certificateholder,  the
Servicer, the Insurer, the Depositor and the Rating Agencies a statement setting
forth:

          (i)  the amount of such  distribution  representing  principal  of the
               Mortgage Loans,  separately  identifying the aggregate  amount of
               any Principal  Prepayments  included therein,  and the portion of
               such  distribution,  if any,  representing  a Monthly  Advance of
               principal and the  Certificate  Principal  Balance of the Class A
               Certificates after giving effect to such distributions;

          (ii) the  amount of such  distribution  representing  interest  on the
               Mortgage  Loans and the  portion  of such  distribution,  if any,
               representing a Monthly Advance of interest;

          (iii)the aggregate  Principal Balances of the Mortgage Loans as of the
               close of  business  on such  Distribution  Date and the amount of
               Principal  Prepayments received during the immediately  preceding
               Prepayment Period;

          (iv) the related  amount of the  Servicing  Fees retained or withdrawn
               from the Custodial Account or the Certificate Account;

          (v)  the amount of Monthly Advances paid by the Servicer;

          (vi) the number and aggregate  principal amounts of Mortgage Loans (A)
               delinquent  (1) one month,  (2) two months,  (3) three  months or
               more and (B) in foreclosure and (C) in bankruptcy;

          (vii)the book  value  (within  the  meaning  of 12  C.F.R.  571.13  or
               comparable provision) of any REO Property;

          (viii) the respective amounts, if any, of Realized Losses allocated to
               the  respective  Classes  of  Certificates  with  respect to such
               Distribution Date;

          (ix) all Monthly Advances recovered during the related Due Period;

          (x)  the amount of any tax imposed on a  "prohibited  transaction"  of
               the Trust Fund as defined in Section  860F of the Code during the
               related Due Period;

          (xi) the amount of any  reduction in  Certificate  Principal  Balance,
               cumulative  interest  shortfall  amount or interest  distribution
               amount for any Class  attributable to the application of Realized
               Losses thereto on such Distribution Date;

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<PAGE>

          (xii)the  amount  of any  Insured  Payment  made on such  Distribution
               Date, the amount of any reimbursement payment made to the Insurer
               on such  Distribution  Date  pursuant to Section  4.02(c) and the
               amount of Cumulative  Insurance  Payments  after giving effect to
               any such Insured Payment or any such reimbursement payment to the
               Insurer;

          (xiii) the  Certificate  Rate on the  Class A  Certificates  for  such
               Distribution Date;

          (xiv)the aggregate  principal balance of all Converting Mortgage Loans
               and Converted  Mortgage Loans,  as the case may be,  purchased by
               the Servicer  pursuant to Section 3.21, the proceeds of which are
               being  distributed  on such  Distribution  Date and the aggregate
               principal balance of all Converted  Mortgage Loans which have not
               been so purchased pursuant to Section 3.21;

          (xv) the Rolling Three Month Delinquency Percentage; and

          (xvi)cumulative  Realized  Losses since the Delivery  Date and for the
               three year period commencing on the Delivery Date.

     (b) Upon  reasonable  advance  notice in  writing,  if  required by federal
regulation, the Trustee will provide to each Certificateholder that is a savings
association, bank or insurance company certain reports and access to information
and  documentation  regarding  the  Mortgage  Loans  sufficient  to permit  such
Certificateholder to comply with applicable  regulations of the Office of Thrift
Supervision or other  regulatory  authorities  with respect to investment in the
Certificates and the Servicer shall cooperate with the Trustee in providing such
information;  PROVIDED,  HOWEVER,  that  the  Trustee  shall be  entitled  to be
reimbursed  by each such  Certificateholder  for the Trustee's  actual  expenses
incurred in providing  such reports and access.  The Trustee will provide to any
Certificateholder upon request the outstanding  Certificate Principal Balance as
of such dates and, if then known by the  Trustee,  the  outstanding  Certificate
Principal  Balances  after giving effect to any  distribution  to be made on the
next following Distribution Date.

SECTION 4.05 PREPAYMENT INTEREST SHORTFALLS AND RELIEF ACT SHORTFALLS.

           Prepayment Interest Shortfalls  resulting from a Principal Prepayment
of a Mortgage Loan during any Prepayment  Period and Relief Act Shortfalls  will
be applied first, to reduce the Class A Interest  Distribution Amount payable on
the  related  Distribution  Date as set forth in the  definition  of the Class A
Interest  Distribution  Amount  and  second,  to  reduce  the  Class S  Interest
Distribution Amount payable on the related Distribution Date, in respect of such
Mortgage Loan.

SECTION 4.06 [THE POLICY.

     (a) If the Servicer  determines that the Deficiency  Amount is greater than
zero with  respect to any  Distribution  Date,  the Trustee  shall  complete the
notice in the Form of Exhibit A to the Policy  (the  "Notice")  and submit  such
Notice in  accordance  with the Policy to the  Insurer no later than 12:00 P.M.,
New York City  time,  on the  third  Business  Day

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<PAGE>

immediately  preceding each Distribution Date, as a claim for an Insured Payment
in an amount equal to such Deficiency Amount.

     (b) The Trustee  shall  establish  and  maintain the  Insurance  Account on
behalf of the Holders of the Class A  Certificates.  Upon  receipt of an Insured
Payment  from the  Insurer  on  behalf of the  Class A  Certificateholders,  the
Trustee shall deposit such Insured Payment in the Insurance Account. All amounts
on  deposit  in  the  Insurance  Account  shall  remain   uninvested.   On  each
Distribution  Date,  the Trustee  shall  transfer  any Insured  Payment  then on
deposit in the Insurance Account to the Certificate  Account.  The Trustee shall
distribute on each Distribution Date the Deficiency Amount for such Distribution
Date from the Certificate Account, together with the distributions to be made to
the Class A  Certificateholders  on such Distribution  Date, as distributions of
interest and principal, respectively.

     (c) The  Trustee  shall (i)  receive  as  attorney-in-fact  of each Class A
Certificateholder  any Insured Payment from the Insurer and (ii) distribute such
Insured  Payment to such Class A  Certificateholders  as set forth in subsection
(b) above. Insured Payments disbursed by the Trustee from proceeds of the Policy
shall not be  considered  payment by the Trust Fund with  respect to the Class A
Certificates, nor shall such disbursement of such Insured Payments discharge the
obligations  of the Trust Fund with  respect to the  amounts  thereof,  [and the
Insurer]  shall  become  owner of such  amounts  to the  extent  covered by such
Insured Payments as the deemed assignee of such Class A Certificateholders.  The
Trustee  hereby  agrees on behalf of each  Class A  Certificateholder  (and each
Class A Certificateholder, by its acceptance of its Class A Certificates, hereby
agrees) for the benefit of the Insurer that the Trustee shall  recognize that to
the extent the Insurer pays Insured Payments,  either directly or indirectly (as
by paying through the Trustee), to the Class A  Certificateholders,  the Insurer
will  be   entitled   to  be   subrogated   to  the   rights   of  the  Class  A
Certificateholders to the extent of such payments.]

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<PAGE>

                                    ARTICLE V
                                    ADVANCES

SECTION 5.01 MONTHLY ADVANCES BY THE SERVICER.

           Subject  to the  conditions  of this  Article  V,  the  Servicer,  as
required  below,  shall  make  a  Monthly  Advance  to the  Certificate  Account
maintained  by the  Trustee,  in the amount,  if any, of the  aggregate  Monthly
Payments less Prepayment  Interest  Shortfalls and Relief Act Shortfalls,  after
adjustment of the interest  portion of each such Monthly Payment to the Mortgage
Rate less the applicable Servicing Fee Rate, on the Mortgage Loans that were due
on the Due Date but that  were not  received  and  remitted  to the  Certificate
Account  on or  prior  to the  Servicer  Advance  Date.  The  Servicer  shall be
obligated to make any such Monthly Advance only to the extent that such advance,
in the good faith judgment of the Servicer,  will be recoverable by the Servicer
from Insurance Proceeds,  Liquidation Proceeds (less Liquidation  Expenses),  or
otherwise on the related Mortgage Loan.

           On  the   Determination   Date  immediately   preceding  the  related
Distribution  Date, the Servicer shall determine  whether and to what extent any
Mortgagor has failed to make any Monthly Payment due on the Due Date and whether
such  deficiencies,  if advanced by the Servicer,  would be  recoverable  by the
Servicer  from  related  Insurance  Proceeds  or  Liquidation  Proceeds  (net of
Liquidation  Expenses).  If the Servicer  shall have  determined  that it is not
obligated to make the entire Monthly  Advance because all or a lesser portion of
such Monthly  Advance  would not be  recoverable  by the  Servicer  from related
Insurance Proceeds or Liquidation  Proceeds (net of Liquidation  Expenses),  the
Servicer shall deliver to the Trustee,  not less than two Business Days prior to
the related  Distribution Date, for the benefit of the  Certificateholders  [and
the  Insurer],  an  Officers'  Certificate  setting  forth the  reasons for such
determination.

           In lieu of  making  all or a  portion  of any  Monthly  Advance,  the
Servicer may cause to be made an  appropriate  entry in its records  relating to
the Custodial  Account that funds in such account,  including but not limited to
any  amounts  received in respect of  scheduled  principal  and  interest on any
Mortgage  due  after  the  related  Due  Period,  in  excess  of  the  Available
Distribution  Amount (less the amount of such  Monthly  Advance) for the related
Distribution  Date have been used by the Servicer in discharge of its obligation
to make any such Monthly Advance.  Any funds so applied shall be replaced by the
Servicer by deposit,  in the manner set forth above, in the Custodial Account no
later than the Servicer  Advance Date to the extent that funds in the  Custodial
Account on such date are less than the amounts required to be distributed on the
related  Distribution Date. The Servicer shall be entitled to be reimbursed from
the Custodial Account for all Monthly Advances of its own funds made pursuant to
this Section as provided in Section 3.09.

SECTION 5.02 ADVANCES FOR ATTORNEYS' FEES.

           The Servicer  shall make  advances  from time to time for  attorneys'
fees and  court  costs  incurred,  or which  reasonably  can be  expected  to be
incurred,  for the  foreclosure  of any Mortgage Loan or for any  transaction in
which the Trustee for the benefit of the


                                       64
<PAGE>

Certificateholders  [and the Insurer] is expected to receive a  deed-in-lieu  of
foreclosure,  unless the Servicer has made a good faith  determination that such
advances  would  not be  recoverable  from  Insurance  Proceeds  or  Liquidation
Proceeds  relating to the Mortgage Loan. If the Servicer shall make a good faith
determination that such advances would not be so recoverable, the Servicer shall
promptly  deliver to the  Trustee an  Officers'  Certificate  setting  forth the
reasons for such determination.  The Servicer shall be entitled to reimbursement
for any such advance as provided in Section 3.09 hereof.

SECTION 5.03 NONRECOVERABLE ADVANCES.

           The  determination  by the Servicer that it has made a Nonrecoverable
Advance shall be evidenced by an Officers'  Certificate of the Servicer promptly
delivered  to the Trustee  setting  forth the  reasons  for such  determination.
Following the Trustee's receipt of the Officers' Certificate, the Servicer shall
be  entitled to  reimbursement  for such  Nonrecoverable  Advance as provided in
Section 3.09 hereof.

SECTION 5.04 ADVANCE PROCEDURES.

     (a) If,  on any  Determination  Date,  the  Servicer  determines  to make a
Monthly  Advance in  accordance  with Section  5.01,  it shall make such Monthly
Advance on or before noon,  St. Paul time,  on the second  Business Day prior to
the related  Distribution Date (the "Servicer Advance Date"). The Servicer shall
notify  the  Trustee  of  the  aggregate   amount  of  Monthly  Advances  for  a
Distribution  Date on or before three  Business Days prior to such  Distribution
Date. Any such Monthly  Advance shall be included with the  distribution  on the
related Distribution Date pursuant to Section 4.02.

     (b) In the event that the Servicer fails to make a Monthly Advance required
to be made pursuant to Section 5.01 on or before 3 p.m., [________] time, on the
Servicer  Advance Date, the Trustee shall on or before 12 noon, New York time on
the next Business Day provide to the Servicer,  by telecopy,  written  notice of
such failure and the amount of such failure and that continuance of such failure
for a period of one Business Day will be an Event of Default.


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                                   ARTICLE VI


                                THE CERTIFICATES

SECTION 6.01 THE CERTIFICATES.

           The  Certificates  shall be in  substantially  the forms set forth in
Exhibits  A,  B and C  hereto,  with  such  appropriate  insertions,  omissions,
substitutions  and  other  variations  as are  required  or  permitted  by  this
Agreement or as may in the  reasonable  judgment of the Trustee or the Depositor
be necessary,  appropriate  or convenient to comply,  or facilitate  compliance,
with  applicable  laws,  and may have such  letters,  numbers or other  marks of
identification  and  such  legends  or  endorsements  placed  thereon  as may be
required to comply with the rules of any securities exchange on which any of the
Certificates may be listed, or as may,  consistently  herewith, be determined by
the officers  executing  such  Certificates,  as  evidenced  by their  execution
thereof.

           The   definitive   Certificates   shall  be   printed,   typewritten,
lithographed  or engraved or produced by any combination of these methods or may
be  produced  in any  other  manner  permitted  by the  rules of any  securities
exchange on which any of the  Certificates  may be listed,  all as determined by
the officers  executing  such  Certificates,  as  evidenced  by their  execution
thereof.

           The Class A  Certificates  will be in  fully-registered  form only in
minimum  denominations of $100,000  Certificate  Principal  Balance and integral
multiples of $1,000 in excess thereof, provided that one Class A Certificate may
be issued in such other amount as is required so that the aggregate of the Class
A Certificate equals its aggregate  Certificate  Principal Balance.  The Class S
Certificates will be issued in fully-registered  form only in minimum Percentage
Interests of 20% and integral  multiples  thereof.  The Class R-I and Class R-II
Certificates will each be issuable only as a single Certificate.

           The Certificates  shall be executed by manual or facsimile  signature
on behalf of the  Trustee by a  Responsible  Officer.  Certificates  bearing the
manual or facsimile  signatures of  individuals  who were, at the time when such
signatures were affixed,  authorized to sign on behalf of the Trustee shall bind
the Trustee, notwithstanding that such individuals or any of them have ceased to
be so authorized prior to the  authentication  and delivery of such Certificates
or did not hold such  offices at the date of such  Certificate.  No  Certificate
shall be  entitled  to any  benefit  under this  Agreement,  or be valid for any
purpose,   unless  there  appears  on  such   Certificate   a   certificate   of
authentication executed by the Trustee by manual signature, and such certificate
of  authentication  upon any Certificate shall be conclusive  evidence,  and the
only evidence,  that such Certificate has been duly  authenticated and delivered
hereunder. All Certificates shall be dated the date of their authentication.

SECTION 6.02 REGISTRATION OF TRANSFER AND EXCHANGE OF CERTIFICATES.

(a) The  Trustee  shall  maintain,  or cause  to be  maintained,  a  Certificate
Register in which,  subject to such reasonable  regulations as it may prescribe,
the Trustee shall provide for the  registration of Certificates and of transfers
and  exchanges  of   Certificates  as

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<PAGE>


herein provided. Upon surrender for registration of transfer of any Certificate,
the  Trustee  shall  execute,  authenticate  and  deliver,  in the  name  of the
designated  transferee  or  transferees,  one or more new  Certificates  in like
aggregate interest and of the same Class.

     (b) At the option of a Certificateholder, Certificates may be exchanged for
other  Certificates of authorized  denominations and the same aggregate interest
in the Trust Fund and of the same Class,  upon surrender of the  Certificates to
be exchanged  at the office or agency of the Trustee set forth in Section  9.11.
Whenever any  Certificates  are so surrendered  for exchange,  the Trustee shall
execute,  authenticate and deliver the Certificates which the  Certificateholder
making the  exchange  is entitled to receive.  Every  Certificate  presented  or
surrendered  for  registration of transfer or exchange shall be accompanied by a
written instrument of transfer in form satisfactory to the Trustee duly executed
by the Holder thereof or his attorney duly authorized in writing.

     (c) No  service  charge  to the  Certificateholders  shall  be made for any
registration  of  transfer or  exchange  of  Certificates,  but payment of a sum
sufficient  to cover  any tax or  governmental  charge  that may be  imposed  in
connection with any transfer or exchange of Certificates may be required.

     (d) All Certificates  surrendered for registration of transfer and exchange
shall be canceled and  subsequently  destroyed by the Trustee in accordance with
the Trustee's customary procedures.

     (e) No transfer of any Class S or Class R Certificate  shall be made unless
that transfer is made pursuant to an effective  registration statement under the
1933 Act and effective  registration or  qualification  under  applicable  state
securities  laws,  or is made in a  transaction  which  does  not  require  such
registration  or  qualification.  In the  event  that a  transfer  is to be made
without  registration or qualification,  (i) the Trustee shall require, in order
to assure  compliance  with such laws,  that the  Certificateholder  desiring to
effect the transfer and such  Certificateholder's  prospective  transferee  each
certify  to the  Trustee  in  writing  in the forms  set forth in  Exhibit H and
Exhibit  I,  respectively,  the  facts  surrounding  the  transfer  and (ii) the
Depositor  or the  Trustee  shall  require  an  opinion  of  counsel  reasonably
satisfactory to the requesting party that such transfer may be made without such
registration or qualification, which Opinion of Counsel shall not be required to
be an expense of the  Depositor or the Trustee.  Neither the  Depositor  nor the
Trustee is obligated  to register or qualify any Class S or Class R  Certificate
under  the 1933  Act or any  other  securities  law or to take  any  action  not
otherwise  required  under  this  Agreement  to  permit  the  transfer  of  such
Certificate or interest without  registration or qualification.  Any such Holder
desiring to effect such transfer shall,  and does hereby agree to, indemnify the
Trustee and the Depositor  against any liability that may result if the transfer
is not so exempt, or is not made in accordance with federal and state laws.

     (f) No  transfer of a Class S or Class R  Certificate  shall be made to any
employee benefit or other plan that is subject to the Employee Retirement Income
Security Act of 1974,  as amended  ("ERISA"),  or Section 4975 of the Code, to a
trustee  or other  person  acting on behalf  of any such  plan,  or to any other
person using "plan assets" to effect such  acquisition,  unless the  prospective
transferee of a Certificateholder  desiring to transfer its Certificate provides
the Trustee with a certification  as set forth in paragraph 6 of Exhibit I or an
Opinion of Counsel

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<PAGE>


which  establishes  to the  reasonable  satisfaction  of the  Depositor  and the
Trustee that the purchase and holding of a Class S or Class R Certificate by, on
behalf of or with "plan  assets" of such plan is  permissible  under  applicable
local law,  would not  constitute  or result in a prohibited  transaction  under
Section  406 of ERISA or Section  4975 of the Code,  and would not  subject  the
Depositor or the Trustee to any obligation or liability  (including  liabilities
under ERISA or Section 4975 of the Code) in addition to those undertaken in this
Agreement  or  any  other  liability.   The  Trustee  shall  require  that  such
prospective  transferee certify to the Trustee in writing the facts establishing
that such  transferee is not such a plan and is not acting on behalf of or using
"plan assets" of any such plan to effect such acquisition.

     (g) Additional  restrictions  on transfers of the Class R  Certificates  to
Disqualified Organizations are set forth below:

                (i) Each Person who has or who acquires any  ownership  interest
      in a Class R Certificate  shall be deemed by the acceptance or acquisition
      of such  ownership  interest to have  agreed to be bound by the  following
      provisions and to have irrevocably  authorized the Trustee or its designee
      under  clause  (iii)(A)  below to deliver  payments to a Person other than
      such Person and to negotiate the terms of any mandatory  sale under clause
      (iii)(B)  below and to execute all  instruments  of transfer and to do all
      other things  necessary in  connection  with any such sale.  The rights of
      each Person acquiring any ownership  interest in a Class R Certificate are
      expressly subject to the following provisions:

                     (A) Each Person holding or acquiring any ownership interest
           in  a  Class  R  Certificate  shall  be  other  than  a  Disqualified
           Organization  and shall promptly  notify the Trustee of any change or
           impending   change  in  its  status  as  other  than  a  Disqualified
           Organization.

                     (B)  In  connection  with  any  proposed  transfer  of  any
           ownership  interest in a Class R Certificate  to a U.S.  Person,  the
           Trustee  shall  require  delivery to it, and shall not  register  the
           transfer  of a  Class  R  Certificate  until  its  receipt  of (1) an
           affidavit  and  agreement (a  "Transferee  Affidavit  and  Agreement"
           attached hereto as Exhibit J) from the proposed  transferee,  in form
           and  substance   satisfactory  to  the  Servicer,   representing  and
           warranting,  among other  things,  that it is not a non-U.S.  Person,
           that such transferee is other than a Disqualified Organization,  that
           it is not acquiring  its ownership  interest in a Class R Certificate
           that is the subject of the proposed Transfer as a nominee, trustee or
           agent  for  any  Person   who  is  not  other  than  a   Disqualified
           Organization,  that for so long as it retains its ownership  interest
           in a Class R  Certificate,  it will  endeavor to remain  other than a
           Disqualified Organization, and that it has reviewed the provisions of
           this  Section  6.02(g)  and  agrees  to be bound  by them,  and (2) a
           certificate, attached hereto as Exhibit K, from the Holder wishing to
           transfer a Class R Certificate, in form and substance satisfactory to
           the Servicer,  representing and warranting,  among other things, that
           no purpose of the proposed transfer is to allow such Holder to impede
           the assessment or collection of tax.


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<PAGE>


                     (C) Notwithstanding the delivery of a Transferee  Affidavit
           and Agreement by a proposed transferee under clause (B) above, if the
           Trustee has actual  knowledge  that the  proposed  transferee  is not
           other than a Disqualified  Organization,  no transfer of an ownership
           interest in a Class R Certificate to such proposed  transferee  shall
           be effected.

                     (D) Each Person holding or acquiring any ownership interest
           in a Class  R  Certificate  agrees,  by  holding  or  acquiring  such
           ownership  interest,  (1)  to  require  a  Transferee  Affidavit  and
           Agreement  from the  other  Person to whom such  Person  attempts  to
           transfer its ownership  interest and to provide a certificate  to the
           Trustee in the form  attached  hereto as Exhibit K, and (2) to obtain
           the express  written consent of the Servicer prior to any transfer of
           such  ownership  interest,  which  consent  may  be  withheld  in the
           Servicer's sole discretion.

                (ii) The  Trustee  shall  register  the  transfer of any Class R
      Certificate  only if it shall have received the  Transferee  Affidavit and
      Agreement,  a certificate  of the Holder  requesting  such transfer in the
      form attached hereto as Exhibit J and all of such other documents as shall
      have been  reasonably  required  by the  Trustee  as a  condition  to such
      registration.

          (iii)(A) If any Disqualified  Organization  shall become a Holder of a
     Class R Certificate,  then the last preceding  Holder that was other than a
     Disqualified  Organization  shall be restored,  to the extent  permitted by
     law, to all rights and  obligations  as Holder  thereof  retroactive to the
     date of registration  of such transfer of such Class R Certificate.  If any
     non-U.S.  Person shall become a Holder of a Class R  Certificate,  then the
     last  preceding  Holder that is a U.S.  Person  shall be  restored,  to the
     extent  permitted by law, to all rights and  obligations  as Holder thereof
     retroactive  to the date of  registration  of the transfer to such non-U.S.
     Person of such Class R Certificate.  If a transfer of a Class R Certificate
     is disregarded  pursuant to the provisions of Treasury  Regulations Section
     1.860E-1 or Section 1.860G-3, then the last preceding Holder that was other
     than a Disqualified Organization shall be restored, to the extent permitted
     by law, to all rights and obligations as Holder thereof  retroactive to the
     date of  registration  of such  transfer of such Class R  Certificate.  The
     Trustee shall be under no liability to any Person for any  registration  of
     transfer of a Class R  Certificate  that is in fact not  permitted  by this
     Section  6.02(g) or for making any payments due on such  Certificate to the
     Holder  thereof or for taking any other  action with respect to such Holder
     under the provisions of this Agreement.

          (B) If any purported  transferee of a Class R Certificate shall become
     a Holder of a Class R Certificate in violation of the  restrictions in this
     Section 6.02(g) and to the extent that the  retroactive  restoration of the
     rights of the Holder of such Class R  Certificate  as  described  in clause
     (iii)(A)  above  shall  be  invalid,  illegal  or  unenforceable,  then the
     Servicer  shall have the right,  without  notice to the Holder or any prior
     Holder of such Class R  Certificate,  to sell such Class R Certificate to a
     purchaser  selected  by the  Servicer  on such  terms as the  Servicer  may
     choose. Such purported transferee shall promptly endorse and


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<PAGE>

     deliver a Class R Certificate in accordance  with the  instructions  of the
     Servicer. Such purchaser may be the Servicer itself or any affiliate of the
     Servicer.  The  proceeds of such sale,  net of the  commissions  (which may
     include  commissions  payable to the Servicer or its affiliates),  expenses
     and taxes due, if any,  shall be remitted by the Servicer to such purported
     transferee. The terms and conditions of any sale under this clause (iii)(B)
     shall  be  determined  in the  sole  discretion  of the  Servicer,  and the
     Servicer shall not be liable to any Person having an ownership  interest or
     a purported  ownership interest in a Class R Certificate as a result of its
     exercise of such discretion.

                (iv)  The  Servicer,  on  behalf  of  the  Trustee,  shall  make
      available,   upon  written  request  from  the  Trustee,  all  information
      reasonably  available  to it that is  necessary to compute any tax imposed
      (A) as a result of the  transfer  of an  ownership  interest  in a Class R
      Certificate   to  any  Person  who  is  not  other  than  a   Disqualified
      Organization,  including the information  regarding "excess inclusions" of
      such Residual  Certificate required to be provided to the Internal Revenue
      Service and certain  Persons as described in Treasury  Regulation  Section
      1.860D-1(b)(5),  and (B) as a result of any regulated  investment company,
      real estate  investment  trust,  common  trust fund,  partnership,  trust,
      estate or  organizations  described  in Section 1381 of the Code having as
      among its  record  holders  at any time any Person who is not other than a
      Disqualified  Organization.  Reasonable  compensation  for providing  such
      information may be required by the Servicer from such Person.

                (v) The  provisions  of this Section  6.02(g) set forth prior to
      this Section (v) may be modified,  added to or eliminated by the Servicer,
      provided  that  there  shall  have  been  delivered  to  the  Trustee  the
      following:

                     (A) written  notification  from each  Rating  Agency to the
           effect  that the  modification,  addition to or  elimination  of such
           provisions  will not  cause  such  Rating  Agency  to  downgrade  its
           then-current rating of the Certificates; and

                     (B) a certificate of the Servicer stating that the Servicer
           has   received  an  Opinion  of  Counsel,   in  form  and   substance
           satisfactory to the Servicer,  to the effect that such  modification,
           addition to or elimination of such  provisions  will not cause either
           REMIC to cease to  qualify as a REMIC and will not create a risk that
           (i) the REMIC may be  subject  to an  entity-level  tax caused by the
           transfer of a Class R Certificate to a Person which is not other than
           a Disqualified  Organization  or (2) a  Certificateholder  or another
           Person will be subject to a REMIC-related  tax caused by the transfer
           of applicable Class R Certificate to a Person which is not other than
           a Disqualified Organization.

                (vi)  The  following   legend  shall  appear  on  each  Class  R
Certificate:

           ANY RESALE,  TRANSFER OR OTHER DISPOSITION OF THIS CERTIFICATE MAY BE
           MADE ONLY IF THE PROPOSED TRANSFEREE PROVIDES A TRANSFER AFFIDAVIT TO
           THE Servicer AND THE TRUSTEE THAT (1) SUCH  TRANSFEREE IS NOT (A) THE
           UNITED


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<PAGE>

          STATES,  ANY  STATE OR  POLITICAL  SUBDIVISION  THEREOF,  ANY  FOREIGN
          GOVERNMENT,   ANY  INTERNATIONAL   ORGANIZATION,   OR  ANY  AGENCY  OR
          INSTRUMENTALITY OF ANY OF THE FOREGOING,  (B) ANY ORGANIZATION  (OTHER
          THAN A  COOPERATIVE  DESCRIBED  IN SECTION  521 OF THE CODE)  WHICH IS
          EXEMPT  FROM THE TAX  IMPOSED  BY  CHAPTER 1 OF THE CODE  UNLESS  SUCH
          ORGANIZATION IS SUBJECT TO THE TAX IMPOSED BY SECTION 511 OF THE CODE,
          (C) ANY  ORGANIZATION  DESCRIBED IN SECTION  1381(a)(2)(C) OF THE CODE
          (ANY SUCH PERSON  DESCRIBED IN THE FOREGOING  CLAUSES (A), (B), OR (C)
          BEING HEREINAFTER  REFERRED TO AS A "DISQUALIFIED  ORGANIZATION"),  OR
          (D) AN AGENT OF A DISQUALIFIED ORGANIZATION AND (2) NO PURPOSE OF SUCH
          TRANSFER  IS TO ENABLE  THE  TRANSFEROR  TO IMPEDE THE  ASSESSMENT  OR
          COLLECTION   OF   TAX.   SUCH   AFFIDAVIT    SHALL   INCLUDE   CERTAIN
          REPRESENTATIONS  AS  TO  THE  FINANCIAL   CONDITION  OF  THE  PROPOSED
          TRANSFEREE.   NOTWITHSTANDING  THE  REGISTRATION  IN  THE  CERTIFICATE
          REGISTER OF ANY TRANSFER,  SALE OR OTHER  DISPOSITION  OF THIS CLASS R
          CERTIFICATE  TO  A  DISQUALIFIED   ORGANIZATION   OR  AN  AGENT  OF  A
          DISQUALIFIED ORGANIZATION,  SUCH REGISTRATION SHALL BE DEEMED TO BE OF
          NO LEGAL  FORCE OR  EFFECT  WHATSOEVER  AND SUCH  PERSON  SHALL NOT BE
          DEEMED TO BE A CERTIFICATEHOLDER FOR ANY PURPOSE HEREUNDER, INCLUDING,
          BUT NOT LIMITED TO, THE RECEIPT OF DISTRIBUTIONS ON THIS  CERTIFICATE.
          EACH  HOLDER  OF  THE  CLASS  R  CERTIFICATE  BY  ACCEPTANCE  OF  THIS
          CERTIFICATE  SHALL BE DEEMED TO HAVE  CONSENTED TO THE  PROVISIONS  OF
          THIS PARAGRAPH.

     (h) The Trustee  shall have no  liability  to the Trust Fund arising from a
transfer of any such  Certificate  in reliance upon a  certification,  ruling or
Opinion of Counsel described in this Section 6.02; PROVIDED,  HOWEVER,  that the
Trustee  shall not register the  transfer of any Class R  Certificate  if it has
actual knowledge that the proposed  transferee does not meet the  qualifications
of a  permitted  Holder of a Class R  Certificate  as set forth in this  Section
6.02.

SECTION 6.03 MUTILATED, DESTROYED, LOST OR STOLEN CERTIFICATES.

           If (a) any mutilated  Certificate is  surrendered to the Trustee,  or
the Trustee receives  evidence to its  satisfaction of the destruction,  loss or
theft of any Certificate and (b) there is delivered to the Servicer, the Insurer
and the Trustee  such  security or  indemnity as may be required by them to save
each of them  harmless,  then, in the absence of notice to the Trustee that such
Certificate  has been  acquired  by a bona fide  purchaser,  the  Trustee  shall
execute,  authenticate  and  deliver,  in  exchange  for or in lieu of any  such
mutilated,  destroyed,  lost or stolen  Certificate,  a new  Certificate of like
tenor and interest in the Trust Fund. In connection with the issuance of any new
Certificate  under this Section  6.03,  the Trustee may require the payment of a
sum sufficient to cover any tax or other governmental charge that may be imposed
in relation  thereto and any other expenses  (including the fees and expenses of
the Trustee) connected therewith. Any replacement Certificate issued pursuant to
this  Section  6.03 shall

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<PAGE>

constitute complete and indefeasible evidence of ownership in the Trust Fund, as
if originally issued,  whether or not the lost, stolen or destroyed  Certificate
shall be found at any time.

SECTION 6.04 PERSONS DEEMED OWNERS.

           Prior  to due  presentation  of a  Certificate  for  registration  of
transfer,  the Servicer, the Trustee, and any agent of the Servicer, the Insurer
or the Trustee may treat the person in whose name any  Certificate is registered
as the owner of such  Certificate for the purpose of receiving  distributions as
provided in this  Agreement and for all other purposes  whatsoever,  and neither
the  Servicer,  the  Trustee,  the  Insurer nor any agent of the  Servicer,  the
Insurer or the Trustee shall be affected by any notice to the contrary.

SECTION 6.05 ACCESS TO LIST OF CERTIFICATEHOLDERS' NAMES AND ADDRESSES.

     (a) If three or more  Certificateholders  (i)  request in writing  from the
Trustee a list of the names and addresses of Certificateholders, (ii) state that
such Certificateholders desire to communicate with other Certificateholders with
respect to their rights under this Agreement or under the Certificates and (iii)
provide a copy of the  communication  which such  Certificateholders  propose to
transmit,  then the Trustee shall, within ten Business Days after the receipt of
such request, afford such Certificateholders access during normal business hours
to a current list of the  Certificateholders.  The expense of providing any such
information   requested   by  a   Certificateholder   shall   be  borne  by  the
Certificateholders  requesting  such  information  and shall not be borne by the
Trustee. Every Certificateholder, by receiving and holding a Certificate, agrees
that the Trustee shall not be held  accountable  by reason of the  disclosure of
any  such  information  as to  the  list  of the  Certificateholders  hereunder,
regardless of the source from which such information was derived.

     (b) The Servicer,  so long as it is the master  servicer  hereunder,  shall
have   unlimited   access  to  a  list  of  the  names  and   addresses  of  the
Certificateholders which list shall be provided by the Trustee promptly upon the
request of the Servicer.

SECTION 6.06 MAINTENANCE OF OFFICE OR AGENCY.

           The Trustee will maintain or cause to be maintained at its expense an
office  or  offices  or  agency  or  agencies  in [St.  Paul,  Minnesota]  where
Certificates  may be surrendered  for  registration  of transfer or exchange and
where notices and demands to or upon the Trustee in respect of the  Certificates
and this Agreement may be served.  The Trustee  initially  designates the office
described in Section 9.11 as its office for such purpose.  The Trustee will give
prompt written notice to the Certificateholders of any change in the location of
any such office or agency.

SECTION 6.07 BOOK-ENTRY CERTIFICATES.

           Notwithstanding  the  foregoing,  the  Class  A  Certificates,   upon
original  issuance,  shall  be  issued  in the  form of one or more  typewritten
Certificates  representing the Book-Entry Certificates,  to be delivered to DTC,
the initial  Clearing  Agency,  by, or on behalf of, the Depositor.  The Class A
Certificates  shall initially be registered on the  Certificate  Register in the
name of [Cede & Co.], the nominee of DTC, as the initial Clearing Agency, and no
Beneficial

                                       72
<PAGE>

Holder  will  receive a  definitive  certificate  representing  such  Beneficial
Holder's  interest in the  Certificates,  except as  provided  in Section  6.09.
Unless  and  until  definitive,   fully  registered  Certificates   ("Definitive
Certificates")  have been issued to the Beneficial  Holders  pursuant to Section
6.09:

     (a) the  provisions  of this Section 6.07 shall be in full force and effect
with respect to the Class A Certificates;

     (b) the Depositor and the Trustee may deal with the Clearing Agency for all
purposes  with  respect  to the Class A  Certificates  (including  the making of
distributions on such Certificates) as the sole Holder of such Certificates;

     (c) to the extent that the  provisions  of this Section 6.07  conflict with
any other  provisions  of this  Agreement,  the  provisions of this Section 6.07
shall control; and

     (d) the rights of the Beneficial  Holders of the Class A Certificates shall
be exercised only through the Clearing Agency and the  Participants and shall be
limited to those  established  by law and  agreements  between  such  Beneficial
Holders  and the  Clearing  Agency  and/or  the  Participants.  Pursuant  to the
Depository  Agreement,  unless  and until  Definitive  Certificates  are  issued
pursuant to Section  6.09,  the  initial  Clearing  Agency will make  book-entry
transfers  among the  Participants  and receive and  transmit  distributions  of
principal and interest on the related Certificates to such Participants.

           For  purposes  of  any  provision  of  this  Agreement  requiring  or
permitting  actions with the consent of, or at the direction of,  Holders of the
Class A Certificates  evidencing a specified  percentage of the aggregate unpaid
principal amount of such Certificates, such direction or consent may be given by
the  Clearing  Agency  at  the  direction  of  Beneficial  Holders  owning  such
Certificates  evidencing  the requisite  percentage of principal  amount of such
Certificates.  The Clearing Agency may take conflicting  actions with respect to
the Class A Certificates  to the extent that such actions are taken on behalf of
the Beneficial Holders.

SECTION 6.08 NOTICES TO CLEARING AGENCY.

           Whenever  notice or other  communication  to the  Holders  of Class A
Certificates  is  required  under this  Agreement,  unless and until  Definitive
Certificates shall have been issued to the related  Certificateholders  pursuant
to Section  6.09,  the Trustee  shall give all such  notices and  communications
specified  herein  to be given to  Holders  of the Class A  Certificates  to the
Clearing Agency which shall give such notices and  communications to the related
Participants   in  accordance  with  its  applicable   rules,   regulations  and
procedures.

SECTION 6.09 DEFINITIVE CERTIFICATES.

           If (a) the Depositor advises the Trustee in writing that the Clearing
Agency is no longer willing or able to properly  discharge its  responsibilities
under the Depository  Agreement with respect to the Certificates and the Trustee
or the Depositor is unable to locate a qualified  successor,  (b) the Depositor,
at its option,  advises the Trustee in writing that it elects to  terminate  the
book-entry system with respect to the Class A Certificates  through the Clearing
Agency or (c) after the  occurrence  of an Event of Default,  Holders of Class A
Certificates evidencing not

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less than 66% of the  aggregate  Certificate  Principal  Balance  of the Class A
Certificates advise the Trustee in writing that the continuation of a book-entry
system with respect to the such  Certificates  through the Clearing Agency is no
longer in the best interests of the Holders of such Certificates with respect to
the  Class  A  Certificates,  the  Trustee  shall  notify  all  Holders  of such
Certificates  of the  occurrence  of any  such  event  and the  availability  of
Definitive Certificates.  Upon surrender to the Trustee of the such Certificates
by the  Clearing  Agency,  accompanied  by  registration  instructions  from the
Clearing Agency for registration, the Trustee shall authenticate and deliver the
Definitive  Certificates.  Neither the Depositor nor the Trustee shall be liable
for any delay in delivery of such instructions and may conclusively rely on, and
shall be  protected  in relying  on,  such  instructions.  Upon the  issuance of
Definitive  Certificates all references herein to obligations imposed upon or to
be  performed  by the  Clearing  Agency  shall be deemed to be imposed  upon and
performed  by the  Trustee,  to the  extent  applicable  with  respect  to  such
Definitive  Certificates,  and  the  Trustee  shall  recognize  the  Holders  of
Definitive Certificates as Certificateholders hereunder.


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                                  ARTICLE VII

                        THE DEPOSITOR AND THE SERVICER

SECTION 7.01 LIABILITIES OF THE DEPOSITOR AND THE SERVICER.

           The  Depositor  and the Servicer  shall each be liable in  accordance
herewith only to the extent of the  obligations  specifically  and  respectively
imposed upon and undertaken by them herein.

SECTION 7.02 MERGER OR CONSOLIDATION OF THE DEPOSITOR OR THE SERVICER.

           The  Depositor  and the Servicer will each do or cause to be done all
things  necessary to preserve  and keep in full force and effect its  existence,
rights and franchises  (charter and statutory) and will each obtain and preserve
its  qualification to do business as a foreign  corporation in each jurisdiction
in which such qualification is or shall be necessary to protect the validity and
enforceability  of this  Agreement,  or any of the Mortgage Loans and to perform
its respective duties under this Agreement.

           Any Person into which the  Depositor or the Servicer may be merged or
consolidated,  or any Person resulting from any merger or consolidation to which
the Depositor or the Servicer shall be a party, or any Person  succeeding to the
business  of the  Depositor  or the  Servicer,  shall  be the  successor  of the
Depositor or the Servicer, as the case may be, hereunder,  without the execution
or  filing  of any paper or any  further  act on the part of any of the  parties
hereto, anything herein to the contrary notwithstanding; PROVIDED, HOWEVER, that
the  successor  or surviving  Person to the Servicer  shall be qualified to sell
mortgage loans to, and to service mortgage loans on behalf of, FNMA or FHLMC.

           Notwithstanding anything else in this Section 7.02 or in Section 7.04
hereof to the  contrary,  the  Servicer  may assign its rights and  delegate its
duties and  obligations  under this Agreement  (except for the obligation of the
Servicer or Seller to effectuate  repurchases or substitutions of Mortgage Loans
hereunder,  including pursuant to Section 2.01, 2.02 or 2.04 hereof, which shall
remain with [__________] hereunder);  PROVIDED, HOWEVER, that the Servicer gives
the  Depositor,  the  Insurer  and the Trustee  notice of such  assignment;  and
PROVIDED  FURTHER,  that such purchaser or transferee  accepting such assignment
and  delegation  shall  be an  institution  that is a FNMA  and  FHLMC  approved
seller/servicer   in  good  standing,   which  has  a  net  worth  of  at  least
$[15,000,000],  and which is willing to service the Mortgage  Loans and executes
and  delivers to the  Depositor  and the  Trustee an  agreement  accepting  such
delegation  and  assignment,  which contains an assumption by such Person of the
rights,  powers,  duties,  responsibilities,  obligations and liabilities of the
Servicer,  with like effect as if originally named as a party to this Agreement;
and PROVIDED  FURTHER,  that each of the Rating  Agencies  acknowledge  that its
rating of the  Certificates in effect  immediately  prior to such assignment and
delegation  or its rating of the risk  undertaken by the Insurer with respect to
the Policy will not be qualified or reduced as a result of such  assignment  and
delegation.  In the case of any such  assignment  and  delegation,  the Servicer
shall be released from its obligations  under this Agreement (except as provided
above),  except that the Servicer  shall remain liable for all

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liabilities  and obligations  incurred by it as Servicer  hereunder prior to the
satisfaction  of the  conditions to such  assignment and delegation set forth in
the preceding sentence.

SECTION 7.03 LIMITATION ON LIABILITY OF THE DEPOSITOR, THE SERVICER AND OTHERS.

           Neither the Depositor,  the Servicer, any Sub-Servicer nor any of the
directors,  officers,  employees or agents of the Depositor, the Servicer or any
Sub-Servicer  shall be under any  liability  to the  Certificateholders  for any
action  taken or for  refraining  from the  taking of any  action in good  faith
pursuant to this Agreement, or for errors in judgment;  PROVIDED,  HOWEVER, that
this  provision  shall not protect the  Depositor  or the  Servicer  against any
breach  of  representations  or  warranties  made by it herein  or  protect  the
Depositor  or the  Servicer or any such person  from any  liability  which would
otherwise be imposed by reasons of willful misfeasance,  bad faith or negligence
in the  performance of duties or by reason of reckless  disregard of obligations
and duties  hereunder.  The Depositor,  the Servicer,  any  Sub-Servicer and any
director,  officer,  employee  or agent of the  Depositor,  the  Servicer or any
Sub-Servicer  may rely in good faith on any  document  of any kind  prima  facie
properly  executed and submitted by any Person  respecting  any matters  arising
hereunder.  The  Depositor,  the Servicer,  any  Sub-Servicer  and any director,
officer,  employee or agent of the Depositor,  the Servicer or any  Sub-Servicer
shall be  indemnified  by the Trust  Fund and held  harmless  against  any loss,
liability or expense  incurred in connection  with any legal action  relating to
this Agreement or the  Certificates,  other than any loss,  liability or expense
incurred  by reason of  willful  misfeasance,  bad  faith or  negligence  in the
performance  of  duties  hereunder  or  by  reason  of  reckless   disregard  of
obligations and duties hereunder, provided that the foregoing indemnification by
the Trust Fund shall be limited to amounts that would otherwise be distributable
with respect to the Class S  Certificates.  Neither the Depositor,  the Servicer
nor any  Sub-Servicer  shall be under any obligation to appear in,  prosecute or
defend  any legal  action  that is not  incidental  to their  respective  duties
hereunder  and which in its opinion may involve it in any expense or  liability;
PROVIDED,  HOWEVER, that either the Depositor,  the Servicer or any Sub-Servicer
may in its  discretion  undertake any such action that it may deem  necessary or
desirable in respect of this  Agreement and the rights and duties of the parties
hereto and interests of the Trustee and the Certificateholders hereunder.

SECTION 7.04 SERVICER NOT TO RESIGN.

           The Servicer shall not resign from the obligations and duties imposed
upon it hereunder  except upon  determination  that such  obligations and duties
hereunder are no longer permissible under applicable law. Any such determination
permitting  the  resignation  of the  Servicer  under this Section 7.04 shall be
evidenced by an Opinion of Counsel to such effect  delivered to the Trustee [and
the Insurer].  The Servicer shall give notice of any proposed resignation to the
Trustee, the  Certificateholders,  the Insurer and the Rating Agencies.  No such
resignation  by the  Servicer  shall  become  effective  until the  Trustee or a
successor  servicer  acceptable to the Insurer shall have assumed the Servicer's
responsibilities and obligations in accordance with Section 8.02 hereof.

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SECTION 7.05 ERRORS AND OMISSIONS INSURANCE; FIDELITY BONDS.

           The  Servicer  shall,  for so long as it acts as servicer  under this
Agreement,  obtain and  maintain in force (a) a policy or policies of  insurance
covering  errors and omissions in the performance of its obligations as servicer
hereunder,  and (b) a fidelity  bond in respect of its  officers,  employees and
agents. Each such policy or policies and bond shall,  together,  comply with the
requirements from time to time of FNMA or FHLMC for persons performing servicing
for mortgage loans purchased by FNMA or FHLMC. In the event that any such policy
or  bond  ceases  to be in  effect,  the  Servicer  shall  obtain  a  comparable
replacement  policy or bond from an insurer or issuer,  meeting the requirements
set forth above as of the date of such replacement.

SECTION 7.06 SERVICER MAY OWN CERTIFICATES.

           The Servicer in its  individual or any other  capacity may become the
owner or pledgee  of  Certificates  with the same  rights as it would have if it
were not the Servicer.




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                                  ARTICLE VIII

                                     DEFAULT

SECTION 8.01 EVENTS OF DEFAULT.

           "Event  of  Default",  wherever  used  herein,  means  any one of the
following events (whatever reason for such Event of Default and whether it shall
be  voluntary or  involuntary  or be effected by operation of law or pursuant to
any judgment,  decree or order of any court or any order,  rule or regulation of
any administrative or governmental body):

                (a)   any   failure   by   the   Servicer   to   remit   to  the
      Certificateholders, the Insurer or to the Trustee any payment other than a
      Monthly  Advance  required to be made by the  Servicer  under the terms of
      this  Agreement,  which failure shall continue  unremedied for a period of
      one Business Day after the date upon which written  notice of such failure
      shall have been given to the Servicer by the  Trustee,  the Insurer or the
      Depositor or to the  Servicer,  the Insurer and the Trustee by the Holders
      of Certificates having not less than 25% of the Voting Rights evidenced by
      the Certificates; or

                (b) any  failure  by the  Servicer  to observe or perform in any
      material  respect any other of the  covenants or agreements on the part of
      the  Servicer  contained  in this  Agreement  (except  as set forth in (c)
      below)   which   failure  (i)   materially   affects  the  rights  of  the
      Certificateholders or the Insurer and (ii) shall continue unremedied for a
      period of 60 days (except that such number of days shall be 15 in the case
      of a failure to pay the premium for any Required  Insurance  Policy) after
      the date on which written  notice of such failure shall have been given to
      the Servicer by the Trustee or the  Depositor,  or to the Servicer and the
      Trustee by the Holders of Certificates evidencing not less than 25% of the
      Voting Rights evidenced by the Certificates; or

                (c) if a representation or warranty set forth in Section 2.03 or
      2.04 hereof shall prove to be materially  incorrect as of the time made in
      any  respect  that  materially  and  adversely  affects  interests  of the
      Certificateholders  or the Insurer,  and the circumstances or condition in
      respect of which such  representation  or warranty was incorrect shall not
      have been  eliminated  or cured,  or the affected  Mortgage Loan shall not
      have been substituted for or repurchased, within 60 days after the date on
      which  written  notice  thereof  shall have been given to the Servicer and
      Seller by the Trustee for the benefit of the  Certificateholders  [and the
      Insurer] or by the Depositor; or

                (d) a  decree  or  order of a court  or  agency  or  supervisory
      authority  having  jurisdiction  in the premises for the  appointment of a
      conservator or receiver or liquidator in any  insolvency,  readjustment of
      debt, marshalling of assets and liabilities or similar proceedings, or for
      the  winding-up  or  liquidation  of its affairs,  shall have been entered
      against the Servicer and such decree or order shall have remained in force
      undischarged or unstayed for a period of 60 days; or

                (e)  the  Servicer  shall  consent  to  the   appointment  of  a
      conservator or receiver or liquidator in any  insolvency,  readjustment of
      debt,  marshalling of assets and



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     liabilities or similar proceedings of or relating to the Servicer or all or
     substantially all of the property of the Servicer; or

                (f) the Servicer shall admit in writing its inability to pay its
      debts  generally as they become due, file a petition to take advantage of,
      or  commence  a  voluntary  case  under,  any  applicable   insolvency  or
      reorganization  statute,  make  an  assignment  for  the  benefit  of  its
      creditors, or voluntarily suspend payment of its obligations; or

                (g) either Rating Agency shall lower or withdraw the outstanding
      rating of the Certificates  because the existing or prospective  financial
      condition  or  mortgage  loan  servicing  capability  of the  Servicer  is
      insufficient to maintain such outstanding rating; or

                (h) any failure of the  Servicer to make any Monthly  Advance in
      the manner and at the time required to be made from its own funds pursuant
      to this Agreement and after receipt of notice from the Trustee pursuant to
      Section 5.04, which failure continues  unremedied after 5 p.m., [St. Paul,
      Minnesota]   time,   on  the  Business  Day   immediately   preceding  the
      Distribution Date; or

                (i)  a Servicer Trigger Event occurs.

           If an Event of Default due to the actions or inaction of the Servicer
described in clauses (a) through (g) or (i) of this Section  shall occur,  then,
and in each and every such case, so long as such Event of Default shall not have
been  remedied,  the Trustee  shall at the  direction of the Insurer  (unless an
Insurer Default is continuing) or, if so directed by the Holders of Certificates
evidencing not less than 25% of the Voting Rights evidenced by the Certificates,
by notice in  writing to the  Servicer  (with the prior  written  consent of the
Insurer and with a copy to the Rating Agencies), terminate all of the rights and
obligations  of  the  Servicer  under  this  Agreement  (other  than  rights  to
reimbursement  for  Monthly  Advances  or other  advances  previously  made,  as
provided in Section 3.09) PROVIDED,  HOWEVER,  that unless an Insurer Default is
continuing  the  successor  to the Servicer  appointed  pursuant to Section 7.02
shall be  acceptable  to the  Insurer  and shall  have  accepted  the  duties of
Servicer effective upon the resignation of the Servicer.

           If an Event of  Default  described  in clause  (h) shall  occur,  the
Trustee  with the  consent  of the  Insurer  (which  shall  not be  unreasonably
withheld) shall, prior to the next Distribution  Date,  terminate the rights and
obligations of the Servicer  hereunder and succeed to the rights and obligations
of the Servicer hereunder pursuant to Section 8.02,  including the obligation to
make Monthly Advances on such Distribution Date pursuant to the terms hereof.

SECTION 8.02 TRUSTEE TO ACT; APPOINTMENT OF SUCCESSOR.

           On and after the time the Servicer  receives a notice of  termination
pursuant to Section  8.01 hereof or resigns  pursuant  to Section  7.04  hereof,
subject to the  provisions  of Section  3.06  hereof,  the Trustee  shall be the
successor in all respects to the Servicer in its capacity as servicer under this
Agreement and with respect to the  transactions set forth or provided for herein
and  shall  be  subject  to all the  responsibilities,  duties  and  liabilities
relating


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thereto placed on the Servicer by the terms and provisions hereof, provided that
the Trustee shall not be deemed to have made any  representation  or warranty as
to any Mortgage  Loan made by the Servicer and shall not effect any  repurchases
or  substitutions  of any Mortgage Loan. As compensation  therefor,  the Trustee
shall be entitled to all funds  relating to the Mortgage Loans that the Servicer
would  have been  entitled  to charge to the  related  Custodial  Account if the
Servicer had continued to act  hereunder  (except that the  terminated  Servicer
shall  retain  the  right to be  reimbursed  for  advances  (including,  without
limitation,  Monthly Advances)  theretofore made by the Servicer with respect to
which it would be entitled to be  reimbursed if it had not been so terminated as
Servicer).  Notwithstanding  the  foregoing,  if  the  Trustee  has  become  the
successor to the Servicer in accordance with this Section 8.02, the Insurer may,
and if the Insurer fails to the Trustee may, if it shall be unwilling to so act,
or shall, if it is unable to so act (exclusive of the  obligations  with respect
to Monthly Advances),  appoint, or petition a court of competent jurisdiction to
appoint, any established mortgage loan servicing  institution  acceptable to the
Insurer,  the  appointment  of which does not adversely  affect the then current
rating of the  Certificates,  as the successor to the Servicer  hereunder in the
assumption of all or any part of the responsibilities,  duties or liabilities of
the Servicer,  provided that such  successor to the Servicer shall not be deemed
to have made any  representation or warranty as to any Mortgage Loan made by the
Servicer.  Pending  appointment  of a successor to the Servicer  hereunder,  the
Trustee,  unless the Trustee is prohibited  by law from so acting,  shall act in
such  capacity as provided  herein.  In  connection  with such  appointment  and
assumption,  the Trustee may make such arrangements for the compensation of such
successor  out of  payments  on Mortgage  Loans as it and such  successor  shall
agree;  PROVIDED,  HOWEVER, that no such compensation shall be in excess of that
permitted the Servicer hereunder. The Trustee and such successor shall take such
action,  consistent with this Agreement, as shall be necessary to effectuate any
such succession.  Neither the Trustee nor any other successor  servicer shall be
deemed to be in default hereunder by reason of any failure to make, or any delay
in making,  any  distribution  hereunder  or any portion  thereof  caused by the
failure of the Servicer to deliver, or any delay in delivering,  cash, documents
or records to it.

           The Servicer that has been  terminated  shall,  at the request of the
Trustee but at the expense of such  Servicer,  deliver to the assuming party all
documents and records relating to each  Sub-Servicing  Agreement and the related
Mortgage  Loans  and an  accounting  of  amounts  collected  and  held by it and
otherwise use its best efforts to effect the orderly and  efficient  transfer of
each Sub-Servicing Agreement to the assuming party.

           The  Servicer  shall  cooperate  with the Trustee  and any  successor
servicer in effecting the  termination  of the Servicer's  responsibilities  and
rights hereunder,  including without limitation,  the transfer to such successor
for administration by it of all cash amounts which shall at the time be credited
by the Servicer to the Custodial Account or thereafter  received with respect to
the Mortgage Loans.

           Neither the Trustee nor any other successor  servicer shall be deemed
to be in default  hereunder  by reason of any  failure to make,  or any delay in
making,  any  distribution  hereunder or any portion  thereof  caused by (a) the
failure  of the  Servicer  to (i)  deliver,  or any delay in  delivering,  cash,
documents  or records to it, (ii)  cooperate as required by this  Agreement,  or
(iii) deliver the Mortgage Loan to the Trustee as required by this Agreement, or
(b) restrictions  imposed by any regulatory  authority having  jurisdiction over
the Servicer.

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<PAGE>

           Any  successor to the  Servicer as servicer  shall during the term of
its  service  as  servicer  maintain  in force the policy or  policies  that the
Servicer is required to maintain pursuant to Section 7.05 hereof.

SECTION 8.03 NOTIFICATION TO CERTIFICATEHOLDERS.

(a) Upon any  termination  or  appointment  of a successor to the Servicer,  the
Trustee  shall  give  prompt  written   notice  thereof  to  the  Insurer,   the
Certificateholders  at their respective  addresses  appearing in the Certificate
Register and to the Rating Agencies.

(b) Within 2 Business  Days after the  occurrence  of any Event of Default,  the
Trustee shall transmit by mail to the Insurer and all Certificateholders and the
Rating  Agencies  notice of each such  Event of Default  hereunder  known to the
Trustee, unless such Event of Default shall have been cured or waived.

SECTION 8.04 WAIVER OF EVENTS OF DEFAULT.

           The  Insurer or the Holders  representing  at least 66% of the Voting
Rights of Certificates  affected by a default or Event of Default  hereunder may
waive any default or Event of Default,  with the written consent of the Insurer,
which consent shall not be unreasonably withheld;  PROVIDED, HOWEVER, that (a) a
default or Event of Default under clause (i) of Section 8.01 may be waived, with
the written  consent of the Insurer,  only by all of the Holders of Certificates
affected by such default or Event of Default (which Voting Rights of the Class A
Certificateholders  may be exercised by the Insurer  without the consent of such
Holders and may only be exercised by such Holders with the prior written consent
of the  Insurer so long as there does not exist a failure by the Insurer to make
a required  payment under the Policy) and (b) no waiver pursuant to this Section
8.04 shall affect the Holders of Certificates in the manner set forth in Section
11.01(b)(i),  (ii) or  (iii).  Upon any such  waiver  of a  default  or Event of
Default by the Insurer or the Holders  representing the requisite  percentage of
Voting Rights of Certificates  affected by such default or Event of Default with
the consent of the Insurer,  which consent shall not be  unreasonably  withheld,
such  default  or Event of Default  shall  cease to exist and shall be deemed to
have been remedied for every purpose  hereunder.  No such waiver shall extend to
any  subsequent  or other  default  or Event of  Default  or  impair  any  right
consequent thereon except to the extent expressly so waived.

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<PAGE>

                                   ARTICLE IX

                             CONCERNING THE TRUSTEE

SECTION 9.01 DUTIES OF TRUSTEE.

           The Trustee, prior to the occurrence of an Event of Default and after
the curing of all  Events of Default  that may have  occurred,  undertakes  with
respect  to the Trust Fund to perform  such  duties and only such  duties as are
specifically  set  forth in this  Agreement.  In case an Event  of  Default  has
occurred and remains uncured,  the Trustee shall exercise such of the rights and
powers vested in it by this Agreement, and use the same degree of care and skill
in  their  exercise,  as a  prudent  person  would  exercise  or use  under  the
circumstances in the conduct of such person's own affairs.  Any permissive right
of the Trustee set forth in this Agreement shall not be construed as a duty.

           The  Trustee,   upon  receipt  of  all   resolutions,   certificates,
statements,  opinions, reports, documents, orders or other instruments furnished
to the Trustee that are  specifically  required to be furnished  pursuant to any
provision of this Agreement shall examine them to determine whether they conform
to the  requirements  of  this  Agreement.  The  Trustee  shall  have no duty to
recompute,  recalculate or verify the accuracy of any  resolution,  certificate,
statement,  opinion, report, document, order or other instrument so furnished to
the Trustee.

           No  provision  of this  Agreement  shall be  construed to relieve the
Trustee from liability for its own negligent  action,  its own negligent failure
to act or its own misconduct,  its negligent  failure to perform its obligations
in compliance  with this  Agreement,  or any liability which would be imposed by
reason of its willful misfeasance or bad faith; PROVIDED, HOWEVER, that:

                (a) prior to the  occurrence  of an Event of Default,  and after
      the  curing of all such  Events of  Default  that may have  occurred,  the
      duties and  obligations  of the Trustee shall be determined  solely by the
      express provisions of this Agreement,  the Trustee shall not be personally
      liable except for the  performance  of such duties and  obligations as are
      specifically  set  forth  in  this  Agreement,  no  implied  covenants  or
      obligations  shall be read into this Agreement against the Trustee and the
      Trustee may  conclusively  rely, as to the truth of the statements and the
      correctness of the opinions  expressed  therein,  upon any certificates or
      opinions  furnished to the Trustee and conforming to the  requirements  of
      this  Agreement  which it reasonably  believed in good faith to be genuine
      and to have been duly executed by the proper  authorities  respecting  any
      matters arising hereunder;

                (b) the Trustee shall not be  personally  liable for an error of
      judgment  made in good  faith  by a  Responsible  Officer  or  Responsible
      Officers of the Trustee,  unless the Trustee was negligent or acted in bad
      faith or with willful misfeasance;

                (c) the Trustee shall not be  personally  liable with respect to
      any action  taken,  suffered or omitted to be taken by it in good faith in
      accordance  with the direction of Holders of  Certificates  evidencing not
      less than 25% of the Voting Rights allocated to



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     each  Class of  Certificates  relating  to the  time,  method  and place of
     conducting  any  proceeding  for any remedy  available to the  Trustee,  or
     exercising  any  trust or power  conferred  upon the  Trustee,  under  this
     Agreement; and

                (d) no provision of this Agreement  shall require the Trustee to
      expend or risk its own funds or otherwise incur any financial liability in
      the  performance of any of its duties  hereunder or in the exercise of any
      of its rights or powers if it shall have reasonable  grounds for believing
      that  repayment of such funds or adequate  indemnity  against such risk or
      liability is not reasonably assured to it.

           Except with respect to an Event of Default described in clause (a) of
Section 8.01,  the Trustee shall not be deemed to have knowledge of any Event of
Default or event which,  with notice or lapse of time, or both,  would become an
Event of  Default,  unless a  Responsible  Officer  of the  Trustee  shall  have
received  written  notice  thereof  from  the  Servicer,   the  Depositor  or  a
Certificateholder,  or a  Responsible  Officer of the Trustee has actual  notice
thereof,  and in the absence of such notice no provision  hereof  requiring  the
taking of any action or the  assumption of any duties or  responsibility  by the
Trustee  following the  occurrence of any Event of Default or event which,  with
notice  or lapse of time or both,  would  become an Event of  Default,  shall be
effective as to the Trustee.

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

SECTION 9.02 CERTAIN MATTERS AFFECTING THE TRUSTEE.


     (a) Except as otherwise provided in Section 9.01:

                (i) the Trustee may request and rely upon and shall be protected
      in  acting  or  refraining  from  acting  upon any  resolution,  Officers'
      Certificate,  certificate of auditors or any other certificate, statement,
      instrument,  opinion, report, notice, request,  consent, order, appraisal,
      bond or other paper or  document  believed by it to be genuine and to have
      been signed or presented by the proper party or parties;

                (ii) the  Trustee may  consult  with  counsel and any Opinion of
      Counsel shall be full and complete authorization and protection in respect
      of any action  taken or suffered or omitted by it  hereunder in good faith
      and in accordance with such Opinion of Counsel;

                (iii)the Trustee shall be under no obligation to exercise any of
      the  trusts or  powers  vested in it by this  Agreement  or to  institute,
      conduct or defend any  litigation  hereunder or in relation  hereto at the
      request, order or direction of any of the Certificateholders,  pursuant to
      the provisions of this  Agreement,  unless such



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     Certificateholders shall have offered to the Trustee reasonable security or
     indemnity against the costs, expenses and liabilities which may be incurred
     therein or thereby;  nothing contained herein shall,  however,  relieve the
     Trustee  of the  obligation,  upon the  occurrence  of an Event of  Default
     (which has not been cured or waived),  to  exercise  such of the rights and
     powers vested in it by this  Agreement,  and to use the same degree of care
     and skill in their exercise as a prudent person would exercise or use under
     the circumstances in the conduct of such person's own affairs;

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

                (v) prior to the occurrence of an Event of Default hereunder and
      after the  curing of all  Events of Default  that may have  occurred,  the
      Trustee  shall  not be bound to make any  investigation  into the facts or
      matters  stated in any  resolution,  certificate,  statement,  instrument,
      opinion, report, notice, request,  consent, order, approval, bond or other
      paper or  document,  unless  requested  in  writing so to do by Holders of
      Certificates  evidencing not less than 25% of the Voting Rights  allocated
      to each Class of  Certificates;  PROVIDED,  HOWEVER,  that if the  payment
      within  a  reasonable  time  to the  Trustee  of the  costs,  expenses  or
      liabilities   likely  to  be   incurred  by  it  in  the  making  of  such
      investigation is, in the opinion of the Trustee, not reasonably assured to
      the Trustee by the security afforded to it by the terms of this Agreement,
      the Trustee may  require  reasonable  indemnity  against  such  expense or
      liability as a condition to taking any such action; the reasonable expense
      of every such  investigation  shall be paid by the  Servicer  in the event
      that such investigation relates to an Event of Default by the Servicer, if
      an Event of Default by the Servicer shall have occurred and is continuing,
      and otherwise by the Certificateholders requesting the investigation;

                (vi)  the  Trustee  may  execute  any of the  trusts  or  powers
      hereunder or perform any duties hereunder either directly or by or through
      agents or attorneys;

                (vii)the  Trustee  shall not be required to expend its own funds
      or otherwise  incur any financial  liability in the  performance of any of
      its duties  hereunder if it shall have  reasonable  grounds for  believing
      that repayment of such funds or adequate  indemnity against such liability
      is not assured to it; and

                (viii)  the  Trustee  shall  not be  liable  for any loss on any
      investment of funds pursuant to this Agreement.

(b) All rights of action under this Agreement or under any of the  Certificates,
enforceable by the Trustee,  may be enforced by it without the possession of any
of the Certificates,  or the production thereof at the trial or other proceeding
relating  thereto,  and any such suit,  action or  proceeding  instituted by the
Trustee  shall be brought in its name for the benefit of all the Holders of such
Certificates, subject to the provisions of this Agreement.

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SECTION 9.03 TRUSTEE NOT LIABLE FOR CERTIFICATES OR MORTGAGE LOANS.

           The recitals contained herein shall be taken as the statements of the
Depositor  or the  Servicer,  as the case may be,  and the  Trustee  assumes  no
responsibility for their correctness. The Trustee makes no representations as to
the  validity or  sufficiency  of this  Agreement,  the  Certificates  or of any
Mortgage Loan or related document.  The Trustee shall not be accountable for the
use or  application  by the  Depositor  or the Servicer of any funds paid to the
Depositor or the  Servicer in respect of the  Mortgage  Loans or deposited in or
withdrawn from the Certificate Account by the Depositor or the Servicer.

SECTION 9.04 TRUSTEE MAY OWN CERTIFICATES.

           The Trustee in its  individual  or any other  capacity may become the
owner or pledgee  of  Certificates  with the same  rights as it would have if it
were not the Trustee.

SECTION 9.05 TRUSTEE'S FEES AND EXPENSES.

           The  Trustee  shall  pay to  itself  on each  Distribution  Date from
amounts on deposit in the  Certificate  Account,  an amount equal to the Trustee
Fee in accordance  with Section  4.02(b).  Any amount  payable to the Trustee on
such  Distribution  Date in excess of such amount on deposit will be paid by the
Servicer from its own funds.  Any payment  hereunder made by the Servicer to the
Trustee,  other than any amount to be paid from the Certificate Account pursuant
to this  Section  9.05,  shall be paid from the  Servicer's  own funds,  without
reimbursement from the Trust Fund therefor.

           The  Trustee  and any  director,  officer,  employee  or agent of the
Trustee shall be  indemnified  by the  Depositor  and held harmless  against any
loss,  liability  or expense (a)  incurred in  connection  with any legal action
relating to this Agreement or the Certificates, or the performance of any of the
Trustee's duties hereunder,  other than any loss,  liability or expense incurred
by reason of willful misfeasance,  bad faith or negligence in the performance of
any of the Trustee's duties hereunder or by reason of reckless  disregard of the
Trustee's  obligations and duties  hereunder and (b) resulting from the exercise
of any  power of  attorney  granted  by the  Trustee  in  accordance  with  this
Agreement. Such indemnity shall survive the termination of this Agreement or the
resignation or removal of the Trustee hereunder.

SECTION 9.06 ELIGIBILITY REQUIREMENTS FOR TRUSTEE.

           The  Trustee  hereunder  shall  at  all  times  be a  corporation  or
association  having its principal  office in a state and city  acceptable to the
Depositor  [and the Insurer] and organized and doing  business under the laws of
such  state or the  United  States of  America,  authorized  under  such laws to
exercise   corporate  trust  powers,   having  ratings  on  its  long-term  debt
obligations at the time of such appointment in at least the third highest rating
category by both Moody's and Standard & Poor's or such lower ratings as will not
cause  Moody's or Standard & Poor's to lower their  then-current  ratings of the
Class A Certificates,  acceptable to the Insurer,  having a combined capital and
surplus of at least  $[50,000,000]  and subject to supervision or examination by
federal or state authority. If such corporation or association publishes reports
of condition at least  annually,  pursuant to law or to the  requirements of the
aforesaid  supervising  or  examining  authority,  then for the purposes of this
Section 9.06 the combined capital and surplus

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of such  corporation or association  shall be deemed to be its combined  capital
and surplus as set forth in its most recent report of condition so published. In
case at any time the Trustee shall cease to be eligible in  accordance  with the
provisions of this Section 9.06,  the Trustee  shall resign  immediately  in the
manner and with the effect specified in Section 9.07 hereof.

SECTION 9.07 RESIGNATION AND REMOVAL OF TRUSTEE.

           The Trustee may at any time resign and be discharged  from the trusts
hereby created by (a) giving written notice of resignation to the Depositor [and
the Insurer] and by mailing notice of  resignation by first class mail,  postage
prepaid,  to  the   Certificateholders  at  their  addresses  appearing  on  the
Certificate Register,  and to the Rating Agencies,  not less than 60 days before
the  date  specified  in  such  notice  when,  subject  to  Section  9.08,  such
resignation  is to  take  effect,  and (b)  acceptance  by a  successor  trustee
acceptable  to  the  Insurer  in  accordance   with  Section  9.08  meeting  the
qualifications  set forth in Section  9.06.  If no successor  trustee shall have
been so appointed and have accepted  appointment within 30 days after the giving
of such notice of resignation,  the resigning  Trustee may petition any court of
competent jurisdiction for the appointment of a successor trustee.

           If at any time the Trustee  shall cease to be eligible in  accordance
with the  provisions  of Section  9.06  hereof  and shall  fail to resign  after
written  request  thereto by the Depositor,  or if at any time the Trustee shall
become incapable of acting,  or shall be adjudged a bankrupt or insolvent,  or a
receiver of the Trustee or of its  property  shall be  appointed,  or any public
officer  shall  take  charge or control of the  Trustee  or of its  property  or
affairs for the purpose of rehabilitation, conservation or liquidation or if the
Trustee breaches any of its obligations or representations  hereunder,  then the
Insurer or, with the prior  written  consent of the Insurer,  the  Depositor may
remove the Trustee and appoint a  successor  trustee by written  instrument,  in
duplicate,  one copy of which  instrument  shall be delivered to the Trustee and
one copy to the successor  trustee.  The Trustee may also be removed at any time
by the Holders of Certificates evidencing not less than 50% of the Voting Rights
evidenced by the  Certificates  with the prior  written  consent of the Insurer.
Notice of any  removal of the  Trustee  and  acceptance  of  appointment  by the
successor trustee shall be given to the Rating Agencies by the Servicer.

           Any  resignation  or  removal of the  Trustee  and  appointment  of a
successor  trustee  pursuant to any of the provisions of this Section 9.07 shall
become  effective upon  acceptance of  appointment  by the successor  trustee as
provided in Section 9.08 hereof.

SECTION 9.08 SUCCESSOR TRUSTEE.

           Any  successor  trustee  appointed as provided in Section 9.07 hereof
shall execute,  acknowledge  and deliver to the Depositor and to its predecessor
trustee an instrument  accepting  such  appointment  hereunder and thereupon the
resignation  or removal of the  predecessor  trustee shall become  effective and
such  successor  trustee,  without any further act,  deed or  conveyance,  shall
become fully vested with all the rights,  powers,  duties and obligations of its
predecessor  hereunder,  with the like effect as if originally  named as trustee
herein. The Depositor and the predecessor trustee shall execute and deliver such
instruments  and do such other  things as may  reasonably  be required  for more
fully and certainly  vesting and  confirming  in the successor  trustee all such
rights, powers, duties, and obligations.

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<PAGE>

           No successor  trustee  shall accept  appointment  as provided in this
Section 9.08 unless at the time of such acceptance such successor  trustee shall
be eligible under the  provisions of Section 9.06 hereof and its  appointment is
acceptable to the Insurer and shall not adversely affect the then current rating
of the Certificates.

           Upon acceptance of appointment by a successor  trustee as provided in
this Section  9.08,  the Servicer  shall mail notice of the  succession  of such
trustee  hereunder to all Holders of Certificates at their addresses as shown in
the Certificate  Register.  If the Servicer fails to mail such notice within ten
days after  acceptance of  appointment by the successor  trustee,  the successor
trustee shall cause such notice to be mailed at the expense of the Depositor.

SECTION 9.09 MERGER OR CONSOLIDATION OF TRUSTEE.

           Any Person into which the Trustee may be merged or  converted or with
which it may be consolidated or any Person resulting from any merger, conversion
or consolidation to which the Trustee shall be a party, or any Person succeeding
to the business of the Trustee, shall be the successor of the Trustee hereunder,
provided that such Person shall be eligible under the provisions of Section 9.06
hereof  without the  execution or filing of any paper or further act on the part
of any of the parties hereto, anything herein to the contrary notwithstanding.

SECTION 9.10 APPOINTMENT OF CO-TRUSTEE OR SEPARATE TRUSTEE.

           Notwithstanding any other provisions of this Agreement,  at any time,
for the purpose of meeting any legal  requirements of any  jurisdiction in which
any part of the Trust Fund or property  securing  any  Mortgage  Note may at the
time be located,  the Servicer  and the Trustee  acting  jointly  shall have the
power and shall  execute  and  deliver  all  instruments  to appoint one or more
Persons approved by the Trustee to act as co-trustee or co-trustees jointly with
the Trustee, or separate trustee or separate trustees, of all or any part of the
Trust Fund, and to vest in such Person or Persons,  in such capacity and for the
benefit of the applicable  Certificateholders,  such title to the Trust Fund, or
any part  thereof,  and,  subject to the other  provisions of this Section 9.10,
such  powers,  duties,  obligations,  rights and trusts as the  Servicer and the
Trustee may consider  necessary  or  desirable.  If the Servicer  shall not have
joined in such  appointment  within  fifteen  days after the  receipt by it of a
request to do so, or in the case an Event of Default  shall have occurred and be
continuing, the Trustee alone shall have the power to make such appointment.  No
co-trustee or separate trustee  hereunder shall be required to meet the terms of
eligibility  as a  successor  trustee  under  Section  9.06  and  no  notice  to
Certificateholders  of the  appointment  of any  co-trustee or separate  trustee
shall be required under Section 9.08.

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

     (a) all rights,  powers,  duties and obligations  conferred or imposed upon
the Trustee,  except for any  obligation of the Trustee under this  Agreement to
advance funds on behalf of the Servicer,  shall be conferred or imposed upon and
exercised or performed by the Trustee and such  separate  trustee or  co-trustee
jointly (it being  understood  that such  separate  trustee or co-trustee is not
authorized to act separately without the Trustee joining in such act),

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except  to the  extent  that  under  any law of any  jurisdiction  in which  any
particular  act or acts are to be performed  by the Trustee  (whether as Trustee
hereunder or as successor to the Servicer),  the Trustee shall be incompetent or
unqualified  to perform such act or acts,  in which event such  rights,  powers,
duties and obligations  (including the holding of title to the Trust Fund or any
portion  thereof in any such  jurisdiction)  shall be  exercised  and  performed
singly by such separate  trustee or  co-trustee,  but solely at the direction of
the Trustee;

     (b) no trustee  hereunder shall be held personally  liable by reason of any
act or omission of any other trustee hereunder; and

     (c) the Servicer and the Trustee  acting jointly may at any time accept the
resignation of or remove any separate trustee or co-trustee.

           Any notice,  request or other  writing  given to the Trustee shall be
deemed to have been given to each of the then separate trustees and co-trustees,
as  effectively  as if given to each of them.  Every  instrument  appointing any
separate  trustee or co-trustee shall refer to this Agreement and the conditions
of this Article IX. Each separate trustee and co-trustee, upon its acceptance of
the trusts conferred,  shall be vested with the estates or property specified in
its instrument of appointment, either jointly with the Trustee or separately, as
may be  provided  therein,  subject  to all the  provisions  of this  Agreement,
specifically including every provision of this Agreement relating to the conduct
of, affecting the liability of, or affording  protection to, the Trustee.  Every
such instrument  shall be filed with the Trustee and a copy thereof given to the
Servicer and the Depositor.

           Any separate  trustee or co-trustee may, at any time,  constitute the
Trustee its agent or  attorney-in-fact,  with full power and  authority,  to the
extent not  prohibited  by law, to do any lawful act under or in respect of this
Agreement on its behalf and in its name.  If any separate  trustee or co-trustee
shall die, become incapable of acting, resign or be removed, all of its estates,
properties,  rights,  remedies  and trusts shall vest in and be exercised by the
Trustee,  to the extent  permitted by law,  without the  appointment of a new or
successor trustee.

SECTION 9.11 OFFICE OF THE TRUSTEE.

     The office of the Trustee for purposes of receipt of notices and demands is
[_____________________________________],  Attn: Structured  Finance/[__________]
200_-____.

SECTION 9.12 TAX RETURNS.

           The Servicer,  upon  request,  will furnish the Trustee with all such
information in the  possession of the Servicer as may be reasonably  required in
connection  with  the  preparation  by the  Trustee  of all tax and  information
returns of the Trust Fund, and the Trustee shall sign such returns. The Servicer
shall  indemnify the Trustee for all  reasonable  costs,  including  legal fees,
related to errors in such tax returns due to errors in  information  provided by
the Servicer.

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                                   ARTICLE X

                                   TERMINATION

SECTION 10.01 TERMINATION UPON LIQUIDATION OR REPURCHASE OF ALL MORTGAGE LOANS.

           The obligations and  responsibilities of the Servicer,  the Depositor
and the Trustee  created  hereby with respect to the Trust Fund  created  hereby
shall terminate upon the earlier of:

                (a) the  repurchase  by the Servicer,  at its  election,  of all
      Mortgage  Loans and all property  acquired in respect of any Mortgage Loan
      remaining  in the Trust Fund,  which  repurchase  right the  Servicer  may
      exercise at its sole and exclusive  election as of any  Distribution  Date
      (such  applicable  Distribution  Date  being  herein  referred  to as  the
      "Optional  Termination  Date") on or after the date on which the aggregate
      Principal  Balance of the Mortgage  Loans at the time of the repurchase is
      less than 5% of the aggregate  Principal  Balance of the Mortgage Loans as
      of the Cut-off Date; and

                (b) the later of (i) twelve  months  after the  maturity  of the
      last Mortgage Loan remaining in the Trust Fund,  (ii) the  liquidation (or
      any advance with respect  thereto) of the last Mortgage Loan  remaining in
      the  Trust  Fund and the  disposition  of all REO  Property  and (iii) the
      distribution  to   Certificateholders   of  all  amounts  required  to  be
      distributed to them pursuant to this Agreement.

In no event shall the trust created hereby  continue beyond the expiration of 21
years from the death of the last  survivor of the  descendants  of Mr. Joseph P.
Kennedy,  former Ambassador of the United States to Great Britain, living on the
date of execution of this Agreement.

           The Mortgage Loan Repurchase Price for any such Optional  Termination
of the Trust  Fund  shall be equal to the  aggregate  Principal  Balance  of the
Mortgage  Loans as of the date of  repurchase,  together with accrued and unpaid
interest  thereon  from the date to which such  interest was paid or advanced at
the sum of the  applicable  Net  Mortgage  Rate and the  Trustee  Fee Rate  with
respect  to each  Mortgage  Loan  through  the  last  day of the  month  of such
repurchase,  plus any sums on  account  of such  Mortgage  Loan  that  have been
advanced  by  the  Servicer  and  are  reimbursable  to the  Servicer  hereunder
(including  the Principal  Balance of each Mortgage Loan that was secured by any
REO  Property)  plus any amounts due the  Insurer and the  Insurance  Agreement;
PROVIDED,  HOWEVER, that if the Servicer shall so choose, the Servicer may remit
the  Mortgage  Loan  Repurchase  Price net of advances  that would  otherwise be
reimbursable to the Servicer and the Servicer would have no further  entitlement
to reimbursement for such advances. The Trustee shall give notice to the Insurer
and the Rating  Agencies of the  Servicer's  election to purchase  the  Mortgage
Loans  pursuant to this Section 10.01 and of the Optional  Termination  Date. No
purchase pursuant to clause (a) is permitted if it would result in a draw on the
Policy unless the Insurer consents.

SECTION 10.02 PROCEDURE UPON OPTIONAL TERMINATION.

     (a) In case of any  Optional  Termination  pursuant to Section  10.01,  the
Servicer shall, at least twenty days prior to the date notice is to be mailed to
the  affected

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Certificateholders  notify  the  Trustee  [and  the  Insurer]  of such  Optional
Termination Date and of the applicable repurchase price of the Mortgage Loans to
be repurchased.

     (b) Any  repurchase of the Mortgage  Loans by the Servicer shall be made on
an Optional Termination Date by deposit of the applicable  repurchase price into
the Certificate  Account,  as applicable,  before the Distribution Date on which
such  repurchase  is  effected.  Upon  receipt by the  Trustee  of an  Officers'
Certificate  of the  Servicer  certifying  as to the deposit of such  repurchase
price into the Certificate Account, the Trustee and each co-trustee and separate
trustee,  if any, then acting as such under this Agreement,  shall, upon request
and at the expense of the Servicer,  execute and deliver all such instruments of
transfer or assignment,  in each case without  recourse,  as shall be reasonably
requested by the Servicer,  to vest title in the Servicer in the Mortgage  Loans
so  repurchased  and shall  transfer or deliver to the Servicer the  repurchased
Mortgage Loans. Any  distributions on the Mortgage Loans received by the Trustee
subsequent  to (or  with  respect  to any  period  subsequent  to) the  Optional
Termination Date shall be promptly remitted by it to the Servicer.

     (c) Notice of the Distribution Date on which the Servicer  anticipates that
the final  distribution  shall be made  (whether upon  Optional  Termination  or
otherwise),  shall be given  promptly by the  Servicer  to the Trustee  [and the
Insurer]  and by the  Trustee by first  class  mail to  Holders of the  affected
Certificates.  Such notice  shall be mailed no earlier than the 15th day and not
later than the 10th day preceding the Optional Termination Date or date of final
distribution, as the case may be. Such notice shall specify (i) the Distribution
Date upon which final  distribution  on the affected  Certificates  will be made
upon  presentation  and surrender of such  Certificates  at the office or agency
therein  designated,  (ii) the amount of such final  distribution and (iii) that
the  Record  Date  otherwise   applicable  to  such  Distribution  Date  is  not
applicable, such distribution being made only upon presentation and surrender of
such  Certificates  at the office or agency  maintained  for such  purposes (the
address of which shall be set forth in such notice).

     (d)  In  the  event  that  any   Certificateholders   shall  not  surrender
Certificates for cancellation  within six months after the date specified in the
above mentioned  written notice,  the Trustee shall give a second written notice
to the remaining such  Certificateholders  to surrender their  Certificates  for
cancellation and receive the final distribution with respect thereto.  If within
six months  after the second  notice  all the  Certificates  shall not have been
surrendered for  cancellation,  the Trustee may take  appropriate  steps, or may
appoint  an  agent  to  take   appropriate   steps,  to  contact  the  remaining
Certificateholders  concerning  surrender  of their  Certificates,  and the cost
thereof shall be paid out of the funds and other assets which remain  subject to
the Trust Fund.

SECTION 10.03 ADDITIONAL TERMINATION REQUIREMENTS.


     (a) In the event the Servicer  exercises  its purchase  option  pursuant to
Section  10.01,  REMIC I or REMIC II, as the case may be, shall be terminated in
accordance with the following  additional  requirements,  unless the Trustee has
received  an Opinion of  Counsel  to the effect  that the  failure of REMIC I or
REMIC II, as the case may be, to comply with the  requirements  of this  Section
will not (i) result in the imposition of taxes on a "prohibited  transaction" of
the REMIC,  as described  in Section 860F of the Code,  or (ii) cause REMIC I or

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REMIC II, as the case may be, to fail to qualify as a REMIC at any time that any
Certificates are outstanding:

                (A)  within  90 days  prior to the final  Distribution  Date set
      forth in the notice given by the Servicer under Section 10.02,  the Holder
      of the Class R Certificates shall adopt a plan of complete  liquidation of
      the REMIC; and

                (B) at or  after  the  time  of  adoption  of any  such  plan of
      complete  liquidation for the REMIC at or prior to the final  Distribution
      Date,  the  Trustee  shall sell all of the assets of the Trust Fund to the
      Depositor for cash; PROVIDED,  HOWEVER,  that in the event that a calendar
      quarter  ends  after  the  time of  adoption  of  such a plan of  complete
      liquidation  but prior to the final  Distribution  Date, the Trustee shall
      not sell any of the  assets of the Trust  Fund  prior to the close of that
      calendar quarter.

     (b) By its acceptance of a Class R  Certificate,  the Holder thereof hereby
agrees to adopt  such a plan of  complete  liquidation  and to take  such  other
action in connection  therewith as may be  reasonably  required to liquidate and
otherwise terminate REMIC I or REMIC II.

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                                   ARTICLE XI

                            MISCELLANEOUS PROVISIONS

SECTION 11.01 AMENDMENT.

     (a) This  Agreement  may be amended from time to time by the  Depositor and
the  Trustee,  with the consent of the Insurer but without the consent of any of
the Certificateholders,

     (i) to cure any ambiguity,

     (ii) to  correct  or  supplement   any   provisions   herein  that  may  be
          inconsistent with any other provisions herein,

     (iii)to modify,  eliminate or add to any of its  provisions  to such extent
          as shall be necessary or  desirable to maintain the  qualification  of
          the  Trust  Fund  as  two  separate  REMICs  at  all  times  that  any
          Certificate  is  outstanding  or to avoid or minimize  the risk of the
          imposition  of any tax on the  Trust  Fund  pursuant  to the Code that
          would be a claim against the Trust Fund, provided that the Trustee has
          received  an Opinion of Counsel to the effect  that (A) such action is
          necessary or desirable to maintain such  qualification  or to avoid or
          minimize  the  risk of the  imposition  of any  such  tax and (B) such
          action will not  adversely  affect the status of the Trust Fund as two
          separate  REMICs or  adversely  affect  in any  material  respect  the
          interests of any Certificateholder, or

     (iv) to make any other  provisions  with  respect to  matters or  questions
          arising under this Agreement that are not materially inconsistent with
          the provisions of this Agreement,  provided that such action shall not
          adversely  affect  in  any  material  respect  the  interests  of  any
          Certificateholder or cause an Adverse REMIC Event.

     (b) This Agreement may be amended from time to time by the  Depositor,  the
Servicer  and the  Trustee  with the  consent of the  Insurer and the Holders of
Certificates  evidencing,  in the aggregate, not less than 66-2/3% of the Voting
Rights of all the  Certificates  for the purpose of adding any  provisions to or
changing in any manner or eliminating any of the provisions of this Agreement or
of  modifying  in any  manner the  rights of the  Holders  of the  Certificates;
PROVIDED,  HOWEVER,  that no such  amendment  may (i)  reduce in any  manner the
amount of, delay the timing of or change the manner in which  payments  received
on or with respect to Mortgage Loans are required to be distributed with respect
to any Certificate  without the consent of the Holder of such Certificate,  (ii)
adversely affect in any material respect the interests of the Holders of a Class
of  Certificates  in a manner  other than as set forth in (i) above  without the
consent of the Holders of  Certificates  evidencing not less than 66-2/3% of the
Voting Rights of such Class,  (iii) reduce the aforesaid  percentages  of Voting
Rights,  the  holders of which are  required  to  consent to any such  amendment
without the consent of 100% of the Holders of Certificates of the Class affected
thereby,  (iv) change the  percentage of the  Principal  Balance of the Mortgage
Loans  specified in Section  10.01(a)  relating to optional  termination  of the
Trust Fund or (v) modify the provisions of this Section 11.01.

                                       92
<PAGE>

           It shall not be necessary for the consent of Certificateholders under
this Section to approve the particular  form of any proposed  amendment,  but it
shall be sufficient if such consent  shall  approve the substance  thereof.  The
manner of obtaining  such consents and of evidencing  the  authorization  of the
execution  thereof by  Certificateholders  shall be  subject to such  reasonable
regulations as the Trustee may prescribe.

     (c) Promptly  after the execution of any amendment to this  Agreement,  the
Trustee shall furnish written notification of the substance of such amendment to
each Certificateholder and the Rating Agencies.

SECTION 11.02 RECORDATION OF AGREEMENT; COUNTERPARTS.

     (a) This  Agreement is subject to  recordation  in all  appropriate  public
offices  for real  property  records  in all the  counties  or other  comparable
jurisdictions in which any or all of the Mortgaged Properties are situated,  and
in any other appropriate public recording office or elsewhere. Such recordation,
if any,  shall be effected by the  Servicer at its expense on  direction  of the
Insurer or the  Trustee,  but only upon  direction of the Insurer or the Trustee
accompanied  by an  Opinion  of  Counsel  to the  effect  that such  recordation
materially and beneficially affects the interests of the  Certificateholders  of
the Trust Fund.

     (b) For the purpose of  facilitating  the  recordation of this Agreement as
herein  provided  and  for  other  purposes,  this  Agreement  may  be  executed
simultaneously in any number of counterparts,  each of which  counterparts shall
be deemed to be an original,  and such counterparts shall constitute but one and
the same instrument.

SECTION 11.03 GOVERNING LAW.

           THIS AGREEMENT  SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY
THE SUBSTANTIVE  LAWS OF THE STATE OF NEW YORK APPLICABLE TO AGREEMENTS MADE AND
TO BE  PERFORMED  IN THE  STATE  OF NEW  YORK AND THE  OBLIGATIONS,  RIGHTS  AND
REMEDIES OF THE PARTIES HERETO AND THE CERTIFICATEHOLDERS SHALL BE DETERMINED IN
ACCORDANCE WITH SUCH LAWS.

SECTION 11.04 INTENTION OF PARTIES.

     (a) It is the express intent of the  Depositor,  the Seller and the Trustee
that the conveyance by the Seller to the Depositor pursuant to the Mortgage Loan
Purchase  Agreement  and the  conveyance  by the  Depositor  to the  Trustee  as
provided  for in Section 2.01 of each of the  Seller's  and  Depositor's  right,
title and  interest in and to the  Mortgage  Loans be, and be  construed  as, an
absolute sale and assignment by the Seller to the Depositor and by the Depositor
to the Trustee of the Mortgage  Loans for the benefit of the  Certificateholders
[and the Insurer].  Further, it is not intended that either conveyance be deemed
to be a pledge of the  Mortgage  Loans by the Seller to the  Depositor or by the
Depositor to the Trustee to secure a debt or other obligation.  However,  in the
event  that the  Mortgage  Loans are held to be  property  of the  Seller or the
Depositor,  or if for any reason the Mortgage  Loan  Purchase  Agreement or this
Agreement is held or deemed to create a security interest in the Mortgage Loans,
then it is  intended  that (i)  this  Agreement  shall  also be  deemed  to be a
security  agreement  within  the  meaning  of  Articles  8



                                       93
<PAGE>

and 9 of the New York Uniform Commercial Code and the Uniform Commercial Code of
any other applicable jurisdiction;  (ii) the conveyances provided for in Section
2.01  shall be  deemed  to be a grant by the  Seller  and the  Depositor  to the
Trustee on behalf of the Certificateholders [and the Insurer] ([and the Insurer]
directly),  to secure  payment in full of the  Secured  Obligations  (as defined
below),  of a security interest in all of the Seller's and the Depositor's right
(including the power to convey title thereto),  title and interest,  whether now
owned  or  hereafter  acquired,  in and to the  Mortgage  Loans,  including  the
Mortgage  Notes,  the Mortgages,  any related  insurance  policies and all other
documents in the related  Mortgage  Files,  and all accounts,  contract  rights,
general  intangibles,  chattel paper,  instruments,  documents,  money,  deposit
accounts,  certificates of deposit,  goods, letters of credit, advices of credit
and uncertificated securities consisting of, arising from or relating to (A) the
Mortgage Loans,  including with respect to each Mortgage Loan, the Mortgage Note
and related  Mortgage,  and all other documents in the related Trustee  Mortgage
Files,  and  including  any  Replacement  Mortgage  Loans;  (B)  pool  insurance
policies,  hazard  insurance  policies and any  bankruptcy  bond relating to the
foregoing,  if  applicable;  (C) the  Certificate  Account;  (D)  the  Custodial
Account;  (E) all amounts  payable  after the Cut-off Date to the holders of the
Mortgage Loans in accordance with the terms thereof;  (F) all income,  payments,
proceeds  and  products of the  conversion,  voluntary  or  involuntary,  of the
foregoing  into  cash,  instruments,  securities  or other  property,  including
without  limitation  all  amounts  from  time to time  held or  invested  in the
Certificate  Account,  whether in the form of cash,  instruments,  securities or
other property;  and (G) all cash and non-cash proceeds of any of the foregoing;
(iii) the  possession  by the  Trustee  or any  other  agent of the  Trustee  of
Mortgage Notes or such other items of property as constitute instruments, money,
documents,  advices of credit, letters of credit, goods, certificated securities
or chattel paper shall be deemed to be a "possession by the secured  party",  or
possession by a purchaser or a person  designated by him or her, for purposes of
perfecting  the  security  interest  pursuant  to the  Uniform  Commercial  Code
(including,  without  limitation,  Sections 9-305, 8-313 or 8-321 thereof);  and
(iv)  notifications  to persons  holding  such  property,  and  acknowledgments,
receipts or  confirmations  from persons holding such property,  shall be deemed
notifications to, or acknowledgments,  receipts or confirmations from, financial
intermediaries,  securities intermediaries, bailees or agents (as applicable) of
the  Trustee  for  the  purpose  of  perfecting  such  security  interest  under
applicable   law.   "Secured   Obligations"   means  (i)  the   rights  of  each
Certificateholder  to be paid any amount owed to it under this  Agreement,  (ii)
the rights of the Insurer to be paid any amount owed to it under this  Agreement
and (iii) all other  obligations  of the  Seller  and the  Depositor  under this
Agreement and the Mortgage Loan Purchase Agreement.

     (b) The Seller and the Depositor,  and, at the Depositor's  direction,  the
Servicer and the Trustee,  shall, to the extent  consistent with this Agreement,
take  such  reasonable  actions  as may be  necessary  to ensure  that,  if this
Agreement  were deemed to create a security  interest in the Mortgage  Loans and
the other property described above, such security interest would be deemed to be
a perfected security interest of first priority as applicable. The Trustee shall
file, at its expense, all filings necessary to maintain the effectiveness of any
original filings necessary under the Uniform Commercial Code as in effect in any
jurisdiction  to perfect  the  Trustee's  security  interest  (and the  security
interest  granted to the Insurer  directly)  in or lien on the  Mortgage  Loans,
including without  limitation (i) continuation  statements,  and (ii) such other
statements  as may be occasioned by any transfer of any interest of the Servicer
or the Depositor in any Mortgage Loan.

                                       94
<PAGE>

SECTION 11.05 NOTICES.

           In addition  to other  notices  provided  under this  Agreement,  the
Trustee shall notify the Rating Agencies in writing:  (a) of any substitution of
any Mortgage Loan; (b) of any payment or draw on any insurance policy applicable
to the Mortgage Loans;  (c) of the final payment of any amounts owing to a Class
of Certificates;  (d) any Event of Default under this Agreement;  and (e) in the
event any Mortgage Loan is repurchased in accordance with this Agreement.

           All directions, demands and notices hereunder shall be in writing and
shall be deemed to have been duly  given  when  received  (i) in the case of the
Depositor,  Credit Suisse First Boston  Mortgage  Securities  Corp.,  11 Madison
Avenue, New York, New York 10055, Attention:  President; (ii) in the case of the
Trustee,   [___________________],   [_____________________],   Attn:  Structured
Finance or such other  address as may hereafter be furnished to the Depositor in
writing  by  the  Trustee;  (iii)  in  the  case  of  the  Seller  or  Servicer,
[___________________],[___________________], Attention: General Counsel; (iv) in
the  case  of the  Insurer,  [___________________],[___________________],  Attn:
Insured  Portfolio  Management  Structured  Finance;  and (v) in the case of the
Rating Agencies,  [Moody's Investors  Service,  Inc. 99 Church Street, New York,
New  York  10007,  Attention:   Mortgage-Backed  Securities  Rating  Group]  and
[Standard & Poor's  Rating  Services,  25  Broadway,  New York,  New York 10004,
Attention:  Structured Finance].  Notices to Certificateholders  shall be deemed
given when mailed, first class postage prepaid.

SECTION 11.06 SEVERABILITY OF PROVISIONS.

           If any one or more of the covenants, agreements,  provisions or terms
of this Agreement  shall be for any reason  whatsoever  held invalid,  then such
covenants,  agreements,  provisions or terms shall be deemed  severable from the
remaining covenants, agreements, provisions or terms of this Agreement and shall
in no way affect the validity or  enforceability of the other provisions of this
Agreement  or of the  Certificates  or the rights of the Holders  thereof or the
Insurer.

SECTION 11.07 LIMITATION ON RIGHTS OF CERTIFICATEHOLDERS.

           The death or incapacity of any Certificateholder shall not operate to
terminate this Agreement or the Trust Fund, nor entitle such Certificateholder's
legal  representative  or heirs to claim an  accounting or to take any action or
commence any  proceeding  in any court for a petition or winding up of the Trust
Fund, or otherwise affect the rights, obligations and liabilities of the parties
hereto or any of them.

           No Certificateholder shall have any right to vote (except as provided
herein) or in any manner  otherwise  control the operation and management of the
Trust Fund, or the obligations of the parties hereto,  nor shall anything herein
set forth or  contained in the terms of the  Certificates  be construed so as to
constitute the Certificateholders from time to time as partners or members of an
association; nor shall any Certificateholder be under any liability to any third
party by reason of any action taken by the parties to this Agreement pursuant to
any provision hereof.

                                       95
<PAGE>

           No  Certificateholder  shall have any right by virtue or by  availing
itself of any  provisions  of this  Agreement to institute  any suit,  action or
proceeding in equity or at law upon or under or with respect to this  Agreement,
unless  such  Holder  previously  shall have given to the  Trustee and Insurer a
written  notice  of an Event  of  Default  and of the  continuance  thereof,  as
provided herein,  and such default would not result in a claim under the Policy,
and  unless  the  Holders of  Certificates  evidencing  not less than 25% of the
Voting Rights evidenced by the Certificates shall also have made written request
upon the Trustee to institute such action, suit or proceeding in its own name as
Trustee  hereunder  and  shall  have  offered  to the  Trustee  such  reasonable
indemnity as it may require against the costs,  expenses,  and liabilities to be
incurred  therein  or thereby  [and the  Insurer]  shall have given its  written
consent, and the Trustee, for 60 days after its receipt of such notice,  request
and offer of  indemnity,  shall have  neglected or refused to institute any such
action,  suit or  proceeding;  it  being  understood  and  intended,  and  being
expressly    covenanted   by   each    Certificateholder    with   every   other
Certificateholder  and the Trustee,  that no one or more Holders of Certificates
shall have any right in any manner  whatever by virtue or by availing  itself or
themselves of any provisions of this  Agreement to affect,  disturb or prejudice
the rights of the Holders of any other of the Certificates, or to obtain or seek
to obtain priority over or preference to any other such Holder or to enforce any
right under this  Agreement,  except in the manner  herein  provided and for the
common benefit of all Certificateholders.  For the protection and enforcement of
the provisions of this Section 11.07, each and every  Certificateholder  and the
Trustee  shall be entitled  to such  relief as can be given  either at law or in
equity.

SECTION 11.08 CERTIFICATES NONASSESSABLE AND FULLY PAID.

           It is the intention of the Depositor  that  Certificateholders  shall
not be personally  liable for  obligations of the Trust Fund, that the interests
in the Trust Fund represented by the Certificates shall be nonassessable for any
reason whatsoever, and that the Certificates, upon due authentication thereof by
the Trustee pursuant to this Agreement, are and shall be deemed fully paid.

SECTION 11.09 [RIGHTS OF THE INSURER.

     (a) The Insurer is an express  third-party  beneficiary  of this  Agreement
unless an Insurer Default exists.

     (b) On each  Distribution  Date the Trustee  shall forward to the Insurer a
copy  of the  reports  furnished  to the  Class  A  Certificateholders  and  the
Depositor on such Distribution Date.

     (c) The Trustee shall provide to the Insurer copies of any report,  notice,
Opinion of Counsel,  Officer's  Certificate,  request for consent or request for
amendment to any document related hereto promptly upon the Trustee's  production
or receipt thereof.

     (d) Unless an Insurer Default  exists,  the Trustee and the Depositor shall
not agree to any amendment to this Agreement  without first having  obtained the
prior  written  consent of the  Insurer,  if such  consent  is not  unreasonably
withheld.

                                       96
<PAGE>

     (e) So long as there  does not exist a  failure  by the  Insurer  to make a
required payment under the Policy,  the Insurer shall have the right to exercise
all rights of the  Holders  of the Class A  Certificates  under  this  Agreement
without any consent of such  Holders,  and such Holders may exercise such rights
only with the prior written consent of the Insurer, except as provided herein.]



                                       97
<PAGE>



           IN WITNESS WHEREOF, the Depositor,  the Servicer and the Trustee have
caused their names to be signed hereto by their  respective  officers  thereunto
duly authorized all as of the first day of [____________, 200_].

                       CREDIT SUISSE FIRST BOSTON MORTGAGE

                         SECURITIES CORP., as Depositor

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



                               [----------------------------],
                               as Seller and Servicer

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



                               [----------------------------],
                               as Trustee

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


<PAGE>



STATE OF NEW YORK    )
                     : ss.:
COUNTY OF NEW YORK   )

           On  this  [___]  day  of  [__________,200_],  before  me,  personally
appeared    [____________],    known    to   me   to    be   an    officer    of
[____________________________],  the  [national  association]  that executed the
within  instrument,  and also known to me to be the person  who  executed  it on
behalf of said national  association,  and acknowledged to me that such national
association executed the within instrument.

           IN  WITNESS  WHEREOF,  I have  hereunto  set my hand and  affixed  my
official seal the day and year in this certificate first above written.


                                    ______________________
                                    Notary Public

[NOTARIAL SEAL]


<PAGE>


STATE OF NEW YORK    )
                     : ss.:
COUNTY OF NEW YORK   )

           On the [___] day of [__________,200_], before me, personally appeared
[__________],  known to me to be a  [_________________]  of Credit  Suisse First
Boston Mortgage  Securities  Corp.,  one of the  corporations  that executed the
within  instrument  and also  known to me to be the person  who  executed  it on
behalf  of  said  corporation,  and  acknowledged  to me that  such  corporation
executed the within instrument.

           IN  WITNESS  WHEREOF,  I have  hereunto  set my hand and  affixed  my
official seal the day and year in this certificate first above written.


                                    ______________________
                                    Notary Public

[NOTARIAL SEAL]


<PAGE>




STATE OF NEW YORK    )
                     : ss.:
COUNTY OF NEW YORK   )

           On the [____] of [__________, 200_] before me, a Notary Public in and
for  said  State,  personally  appeared  [______________]  known  to  me to be a
[_____________]  of  [________________],   the  [________________________]  that
executed  the  within  instrument  and  also  known to me to be the  person  who
executed  it on  behalf  of said  bank,  and  acknowledged  to me that such bank
executed the within instrument.

           IN  WITNESS  WHEREOF,  I have  hereunto  set my hand and  affixed  my
official seal the day and year in this certificate first above written.


                                    ______________________
                                    Notary Public

[NOTARIAL SEAL]


<PAGE>




                                    EXHIBIT A

                           FORM OF CLASS A CERTIFICATE

SOLELY FOR U.S.  FEDERAL  INCOME TAX PURPOSES,  THIS  CERTIFICATE  IS A "REGULAR
INTEREST"  IN A "REAL  ESTATE  MORTGAGE  INVESTMENT  CONDUIT" AS THOSE TERMS ARE
DEFINED, RESPECTIVELY, IN SECTIONS 860G AND 860D OF THE CODE.

THIS  CERTIFICATE  DOES NOT  REPRESENT  AN INTEREST IN OR  OBLIGATION  OF CREDIT
SUISSE FIRST BOSTON MORTGAGE  SECURITIES CORP. OR THE TRUSTEE REFERRED TO BELOW,
OR OF ANY OF THEIR AFFILIATES.  THIS CERTIFICATE IS NOT GUARANTEED OR INSURED BY
ANY GOVERNMENT AGENCY OR INSTRUMENTALITY.



                                      A-1
<PAGE>




                             [--------------------]
                    MORTGAGE-BACKED PASS-THROUGH CERTIFICATE

                            SERIES 200_-____, CLASS A

Evidencing an undivided  interest in a Trust Fund whose assets consist of a pool
of adjustable-rate,  conventional  mortgage loans secured by first liens on one-
to four-family,  residential  real properties and certain other property held in
trust transferred by

              CREDIT SUISSE FIRST BOSTON MORTGAGE SECURITIES CORP.

CUSIP                             $            INITIAL AGGREGATE
                                               CLASS A CERTIFICATE
- - - - - - - - --------------------                           PRINCIPAL BALANCE

Certificate No. A-          $____________      INITIAL  CERTIFICATE
                  ----                         PRINCIPAL BALANCE OF
                                               THIS CERTIFICATE

First Distribution                             Final Scheduled
Date:                                          Distribution Date:
[_________, 200_]

           THIS  CERTIFIES  THAT  CEDE  &  CO.  is  the  registered  owner  of a
beneficial  interest in the Trust Fund referred to below consisting of a pool of
adjustable-rate  conventional  mortgage  loans secured by first liens on one- to
four-family residential real properties (the "Mortgage Loans") and certain other
property  held in trust  transferred  to the Trust Fund by Credit  Suisse  First
Boston  Mortgage  Securities  Corp.  (the  "Depositor"),   and  certain  related
property.  The Trust Fund was created  pursuant  to the  Pooling  and  Servicing
Agreement, dated as of [_________, 200_] (the "Agreement"), among the Depositor,
[________________], as trustee (the "Trustee", which term includes any successor
entity under the Agreement) and [___________________], as seller and servicer, a
summary of certain of the  pertinent  provisions  of which is set forth  herein.
This  Certificate  is issued under and is subject to the terms,  provisions  and
conditions of the Agreement,  to which Agreement the Holder of this  Certificate
by virtue of the acceptance hereof assents and by which such Holder is bound.

           This Certificate is one of a duly authorized issue of certificates by
Credit  Suisse  First  Boston  Mortgage  Securities  Corp.   designated  as  the
[_______________]  Mortgage-Backed  Pass-Through Certificates,  Series 200_-____
(the "Certificates"),  which is comprised of the following [four] Classes: Class
A, Class S, Class R-I and Class R-II.  Reference is hereby made to the Agreement
for a statement of the  respective  rights  thereunder  of the Depositor and the
Trustee  and the  Holders  of the  Certificates  and the  terms  upon  which the
Certificates are  authenticated  and delivered.  This Certificate  represents an
interest in the Trust Fund,  which Trust Fund  consists of, among other  things,
(i) the Mortgage Loans and all  distributions  thereon payable after the Cut-off
Date, net of certain amounts in accordance with the provisions of the Agreement,
(ii) the Certificate Account and the Custodial Account and all amounts deposited
therein  pursuant to the  applicable  provisions  of the  Agreement,  net of any
investment  earnings  thereon,  (iii)  the  interest  of the  Trust  Fund in any
insurance  policies with respect to the Mortgage


                                      A-2
<PAGE>

Loans,  (iv) the interest of the Trust Fund in the Policy issued for the benefit
of the  Holders of the Class A  Certificates,  (v) the  rights of the  Depositor
assigned to the Trustee  pursuant to Sections 2.01 and 3.01 of the Agreement and
(vi) all proceeds of the  conversion,  voluntary or  involuntary,  of any of the
foregoing into cash or other liquid property.

           This Class A Certificate  represents a Percentage  Interest  equal to
the Initial  Certificate  Principal  Balance of this Certificate  divided by the
Initial Certificate  Principal Balance of the Class A Certificates,  both as set
forth above.

           The Trustee shall  distribute  from the Certificate  Account,  to the
extent of available  funds, on the 25th day of each calendar month,  or, if such
25th day is not a Business Day, the Business Day immediately following such 25th
day (each, a "Distribution Date"),  commencing [_________,  200_], to the Person
in whose name this  Certificate  is  registered  at the close of business on the
last  Business  Day of  the  month  immediately  preceding  the  month  of  such
distribution (each, a "Record Date"), a principal amount equal to the product of
the Percentage  Interest  evidenced by this  Certificate and that portion of the
Available  Distribution  Amount that is  allocated to principal on such Class of
Certificates on such Distribution Date.

           Distributions of interest will be made on each Distribution  Date, to
the extent of available  funds, in an amount equal to the sum of (a) one month's
interest  accrued  at  the  per  annum   Certificate  Rate  on  the  outstanding
Certificate  Principal  Balance of this  Certificate  as of the day  immediately
prior to the related  Distribution  Date  reduced by its pro rata portion of the
aggregate shortfalls of interest allocated to such Class of Certificates and (b)
the amount of any Class A Cumulative  Interest  Shortfall Amount payable on such
Distribution Date.

           Not later than each Distribution  Date, the Trustee will send to each
Certificateholder a statement  containing  information  relating to the Mortgage
Loans and payments made to Certificateholders.

           Distributions  on this  Certificate  will be made by the  Trustee  by
check mailed to the address of the Holder hereof entitled thereto at the address
appearing  in the  Certificate  Register or, if such Holder holds one or more of
this Class of  Certificates  with an  aggregate  initial  Certificate  Principal
Balance of at least  $[2,500,000]  or all of the  Certificates of this Class, by
wire  transfer  in   immediately   available   funds  to  the  account  of  such
Certificateholder  designated  in writing to the Trustee at least five  Business
Days prior to the applicable Record Date.  Notwithstanding  the above, the final
distribution on this  Certificate  will be made after due notice of the pendency
of such final  distribution  and only upon  presentation  and  surrender of this
Certificate at the office or agency designated in such notice.

           The Agreement  permits,  with certain exceptions as therein provided,
the amendment  thereof and the modification of the rights and obligations of the
Depositor  and the  Trustee and the rights of the  Certificateholders  under the
Agreement at any time by the  Depositor  and the Trustee with the consent of the
Holders of  Certificates  evidencing  Voting  Rights  aggregating  not less than
66-2/3% of the Voting Rights of all the Certificates; PROVIDED, HOWEVER, that no
such  amendment  may (i) reduce in any manner the amount of, delay the timing of
or change the manner in which  payments  received on Mortgage Loans are required
to be  distributed  in respect of any  Certificate  without  the  consent of the
Holder of such  Certificate,  (ii) adversely


                                      A-3
<PAGE>

affect in any  material  respect  the  interests  of the  Holders  of a Class of
Certificates  in a manner  other than in (i) above  without  the  consent of the
Holders of Certificates evidencing not less than 66-2/3% of the Voting Rights of
such Class and (iii) reduce the  aforesaid  percentages  of Voting  Rights,  the
holders of which are  required  to consent to any such  amendment,  without  the
consent of 100% of the Holders of  Certificates  of the Class affected  thereby.
Any such  consent  by the Holder of this  Certificate  shall be  conclusive  and
binding on such Holder and upon all future  Holders of this  Certificate  and of
any  Certificate  issued upon the transfer  hereof or in exchange  herefor or in
lieu  hereof  whether  or not  notation  of  such  consent  is  made  upon  this
Certificate.  The Agreement  also permits the Depositor and the Trustee to amend
certain terms and conditions  set forth in the Agreement  without the consent of
Holders of the  Certificates.  At any time that any of the Class A  Certificates
are outstanding, [___]% of all Voting Rights will be allocated to the Holders of
the Class A Certificates,  in proportion to their then  outstanding  Certificate
Principal Balances, [___]% of all Voting Rights will be allocated to the Holders
of the Class S  Certificates,  [___]% of all Voting  Rights will be allocated to
the Holders of the Class R-I  Certificates  and [___]% of all Voting Rights will
be allocated to the Holders of the Class R-II Certificates.

           As  provided  in the  Agreement  and  subject to certain  limitations
therein  set forth,  the  transfer of this  Certificate  is  registrable  on the
Certificate  Register upon surrender of this  Certificate  for  registration  of
transfer  at the  office or  agency of the  Trustee  designated  therefor,  duly
endorsed  by, or  accompanied  by a written  instrument  of  transfer  in a form
satisfactory  to the Trustee duly executed by the Holder hereof or such Holder's
attorney duly authorized in writing,  and thereupon one or more new Certificates
of the same Class and of authorized  denominations,  and for the same  aggregate
interest  in the  Trust  Fund will be issued  to the  designated  transferee  or
transferees.

           The Class A Certificates  will be issued in fully  registered form in
minimum  denominations of $100,000 Certificate Principal Balance and in integral
multiples  of  $1,000  in excess of such  amount;  PROVIDED,  HOWEVER,  that one
Certificate  of each Class may be issued in such other  amount as is required so
that the aggregate of each Class of Certificates equals its respective aggregate
Certificate  Principal  Balance.  As  provided in the  Agreement  and subject to
certain  limitations therein set forth, this Certificate is exchangeable for one
or more new  Certificates  of the same  Class  and of  authorized  denominations
evidencing a like aggregate  Certificate  Principal Balance, as requested by the
Holder surrendering the same.

           No service charge will be made for such registrations of transfers or
exchanges,  but the Trustee may require payment of a sum sufficient to cover any
tax or other governmental  charge payable in connection  therewith.  The Trustee
and any agent of the Trustee may treat the person in whose name this Certificate
is registered as the owner hereof for all purposes,  and neither the Trustee nor
any such agent thereof shall be affected by notice to the contrary.

           The obligations and responsibilities of the Depositor and the Trustee
created by the Agreement  will terminate upon the earlier of (a) the purchase by
the  Servicer  from the  Trust  Fund of all  remaining  Mortgage  Loans  and all
property  acquired in respect of such Mortgage  Loans,  thereby  effecting early
retirement of the Certificates, or (b) the maturity or other liquidation (or any
advance with respect  thereto) of the last Mortgage Loan  remaining in the Trust
Fund and the  disposition of all property  acquired upon  foreclosure or deed in
lieu of

                                      A-4
<PAGE>

foreclosure  of any Mortgage  Loan. As provided in the  Agreement,  the right to
purchase all Mortgage  Loans  pursuant to clause (a) above shall be  conditioned
upon the unpaid  Principal  Balances of such Mortgage  Loans, at the time of any
such repurchase,  aggregating less than 5% of the aggregate  Principal  Balances
thereof as of the Cut-off Date.

           Any term used herein that is defined in the Agreement  shall have the
meaning  assigned  in  the  Agreement,   and  nothing  herein  shall  be  deemed
inconsistent  with that meaning.  If the terms hereof are inconsistent  with the
Agreement, the Agreement shall control.

           Unless the certificate of authentication  hereon has been executed by
or on behalf of the Trustee by manual  signature,  this Certificate shall not be
entitled to any benefit under the  Agreement or be valid or  obligatory  for any
purpose.

           The recitals  contained  herein shall be taken as  statements  of the
Depositor and not of the Trustee.  The Trustee assumes no responsibility for the
correctness  of the  statements  contained  in this  Certificate  and  makes  no
representation  as to  the  validity  or  sufficiency  of  the  Agreement,  this
Certificate, any Mortgage Loan or any related document.



                                      A-5
<PAGE>



           IN WITNESS  WHEREOF,  the Trustee has caused this  Certificate  to be
duly executed under its corporate seal.

                               [_______________________],
                                solely as Trustee
                                and not individually



                               By:_______________________
                                  Authorized Officer



                          CERTIFICATE OF AUTHENTICATION

This is one of the Certificates referred to in the within-mentioned Agreement.

Date:
       ----------------------



[-----------------------],
as Trustee

By:-----------------------
      Authorized Officer



                                      A-6
<PAGE>




                                   ASSIGNMENT

     FOR  VALUE  RECEIVED  the  undersigned   hereby   sell(s),   assign(s)  and
transfer(s) unto _______________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
(Please  print or typewrite  name and  address,  including  postal zip code,  or
assignee)  the  undivided  interest  in the Trust Fund  evidenced  by the within
Certificate  and  hereby  authorize(s)  the  transfer  of  registration  of such
interest to the assignee on the Certificate Register.

      I (we) further  direct the Trustee to issue a new  Certificate of the same
Class and of a like Initial Certificate Principal Balance and undivided interest
in the Trust Fund to the above-named assignee and to deliver such Certificate to
the following address:
________________________________________________________________________________
________________________________________________________________________________



Dated:____________________________________

_________________________              _______________________________________
Social Security or                     Signature by or on behalf of assignor
other Tax Identification               (signature must be signed as registered)

No. of Assignee
                                        ____________________________
                                        Signature Guaranteed

                            DISTRIBUTION INSTRUCTIONS

           The assignee  should include the following for the information of the
Master Servicer:

     Distribution  shall be made by check  mailed  to__________________________,
_____________________________________  or if the aggregate  initial  Certificate
Principal  Balance of  Certificates of this Class held by the Holder is at least
$[2,500,000]  or the  Percentage  Interest  within  such Class is 100%,  and the
Trustee shall have received  appropriate wiring  instructions in accordance with
the   Agreement,   by  wire   transfer  in   immediately   available   funds  to
________________________________the   account  of  ,  __________________________
account number  _________________.  This information is provided by the assignee
named above, or its agent.

                                      A-7
<PAGE>
                                    EXHIBIT B

                           FORM OF CLASS S CERTIFICATE

THIS  CERTIFICATE  HAS NOT BEEN AND WILL NOT BE REGISTERED  UNDER THE SECURITIES
ACT OF 1933, AS AMENDED (THE "ACT"), OR THE SECURITIES LAWS OF ANY STATE AND MAY
NOT BE RESOLD OR  TRANSFERRED  UNLESS IT IS REGISTERED  PURSUANT TO SUCH ACT AND
LAWS OR IS SOLD OR TRANSFERRED IN TRANSACTIONS THAT ARE EXEMPT FROM REGISTRATION
UNDER SUCH ACT AND UNDER  APPLICABLE  STATE LAW AND IS TRANSFERRED IN ACCORDANCE
WITH THE PROVISIONS OF SECTION 6.02 OF THE AGREEMENT REFERRED TO HEREIN.

THE YIELD TO MATURITY ON THIS  CERTIFICATE  WILL BE  EXTREMELY  SENSITIVE TO THE
RATE AND TIMING OF PAYMENTS (INCLUDING PREPAYMENTS) ON THE MORTGAGE LOANS.

SOLELY FOR U.S.  FEDERAL  INCOME TAX PURPOSES,  THIS  CERTIFICATE  IS A "REGULAR
INTEREST"  IN A "REAL  ESTATE  MORTGAGE  INVESTMENT  CONDUIT" AS THOSE TERMS ARE
DEFINED, RESPECTIVELY, IN SECTIONS 860G AND 860D OF THE CODE.

THE FOLLOWING  INFORMATION  IS PROVIDED  SOLELY FOR THE PURPOSES OF APPLYING THE
U.S.   FEDERAL  INCOME  TAX  ORIGINAL  ISSUE  DISCOUNT  ("OID")  RULES  TO  THIS
CERTIFICATE.  THE ISSUE DATE OF THIS  CERTIFICATE  IS  [_______________,  200_].
ASSUMING  THAT  THE  MORTGAGE  LOANS  PREPAY  AT 100% SPA (AS  DESCRIBED  IN THE
PROSPECTUS  SUPPLEMENT),  AND ASSUMING A CONSTANT PASS-THROUGH RATE EQUAL TO THE
INITIAL  CERTIFICATE  RATE,  THIS  CERTIFICATE HAS BEEN ISSUED WITH NO MORE THAN
$____ OF OID PER [$1,000]  [$100,000] OF [INITIAL NOTIONAL AMOUNT],  THE PRE-TAX
YIELD TO  MATURITY  IS ____% AND THE AMOUNT OF OID  ATTRIBUTABLE  TO THE INITIAL
ACCRUAL  PERIOD  IS NO MORE THAN  $____  PER  [$1,000]  [$100,000]  OF  [INITIAL
NOTIONAL  AMOUNT],  COMPUTED USING THE APPROXIMATE  METHOD. NO REPRESENTATION IS
MADE  THAT THE  MORTGAGE  LOANS  WILL  PREPAY  AT A RATE  BASED ON THE  STANDARD
PREPAYMENT  ASSUMPTION  OR AT  ANY  OTHER  RATE  OR AS TO THE  CONSTANCY  OF THE
CERTIFICATE RATE.

THIS  CERTIFICATE  DOES NOT  REPRESENT  AN INTEREST IN OR  OBLIGATION  OF CREDIT
SUISSE FIRST BOSTON MORTGAGE  SECURITIES CORP. OR THE TRUSTEE REFERRED TO BELOW,
OR OF ANY OF THEIR AFFILIATES.  THIS CERTIFICATE IS NOT GUARANTEED OR INSURED BY
ANY GOVERNMENT AGENCY OR INSTRUMENTALITY.


                                      B-1
<PAGE>

                           [________________________]
                    MORTGAGE-BACKED PASS-THROUGH CERTIFICATE

                            SERIES 200_-____, CLASS S

Evidencing an undivided  interest in the interest  portion of a Trust Fund whose
assets consist of a pool of adjustable-rate, conventional mortgage loans secured
by first liens on one- to four-family,  residential  real properties and certain
other property held in trust transferred by

                    CREDIT SUISSE FIRST BOSTON MORTGAGE SECURITIES CORP.

                                      $        INITIAL AGGREGATE
                                               NOTIONAL AMOUNT OF
                                               CLASS S CERTIFICATES

Certificate No. S-               100%          PERCENTAGE INTEREST
                  ----                         REPRESENTED BY THIS
                                               CERTIFICATE

First Distribution                             Final Scheduled
Date:                                          Distribution Date:
[__________, 200_]

     THIS  CERTIFIES  THAT  ____________________  is the  registered  owner of a
beneficial  interest in the Trust Fund referred to below consisting of a pool of
adjustable-rate,  conventional  mortgage loans secured by first liens on one- to
four-family residential real properties (the "Mortgage Loans") and certain other
property  held in trust  transferred  to the Trust Fund by Credit  Suisse  First
Boston  Mortgage  Securities  Corp.  (the  "Depositor"),   and  certain  related
property.  The Trust Fund was created  pursuant  to the  Pooling  and  Servicing
Agreement,  dated  as  of  [__________,  200_]  (the  "Agreement"),   among  the
Depositor, [___________________], as trustee (the "Trustee", which term includes
any successor entity under the Agreement) and [_________________], as seller and
servicer, a summary of certain of the pertinent provisions of which is set forth
herein. This Certificate is issued under and is subject to the terms, provisions
and  conditions  of the  Agreement,  to  which  Agreement  the  Holder  of  this
Certificate by virtue of the acceptance  hereof assents and by which such Holder
is bound.

           This Certificate is one of a duly authorized issue of certificates by
Credit  Suisse  First  Boston  Mortgage  Securities  Corp.   designated  as  the
[_______________]  Mortgage-Backed  Pass-Through Certificates,  Series 200_-____
(the "Certificates"),  which is comprised of the following [four] Classes: Class
A, Class S, Class R-I and Class R-II.  Reference is hereby made to the Agreement
for a statement of the  respective  rights  thereunder  of the Depositor and the
Trustee  and the  Holders  of the  Certificates  and the  terms  upon  which the
Certificates are  authenticated  and delivered.  This Certificate  represents an
interest in the Trust Fund,  which Trust Fund  consists of, among other  things,
(i) the Mortgage Loans and all  distributions  thereon payable after the Cut-off
Date, net of certain amounts in accordance with the provisions of the Agreement,
(ii) the Certificate Account and the Custodial Account and all amounts deposited
therein  pursuant to the  applicable  provisions  of the  Agreement,  net of any
investment  earnings


                                      B-2
<PAGE>

thereon,  (iii) the interest of the Trust Fund in any  insurance  policies  with
respect to the Mortgage Loans, (iv) the interest of the Trust Fund in the Policy
issued for the  benefit  of the  Holders  of the Class A  Certificates,  (v) the
rights of the  Depositor  assigned to the Trustee  pursuant to Sections 2.01 and
3.01 of the  Agreement  and (vi) all  proceeds of the  conversion,  voluntary or
involuntary, of any of the foregoing into cash or other liquid property.

           This Class S Certificate represents the right to receive a portion of
interest with respect to the Mortgage Loans on a Distribution Date. This Class S
Certificate  is not entitled to any  distributions  with respect to principal on
the Mortgage Loans in the Trust Fund.

           The Trustee shall  distribute  from the Certificate  Account,  to the
extent of available  funds, on the 25th day of each calendar month,  or, if such
25th day is not a Business Day, the Business Day immediately following such 25th
day (the "Distribution Date"), commencing  [_____________,  200_], to the Person
in whose name this  Certificate  is  registered  at the close of business on the
last  Business  Day of  the  month  immediately  preceding  the  month  of  such
distribution  (each a "Record  Date"),  distributions  of  interest in an amount
equal to the Class S Interest Distribution Amount for such Distribution Date.

           Not later than each Distribution  Date, the Trustee will send to each
Certificateholder a statement  containing  information  relating to the Mortgage
Loans and payments made to Certificateholders.

           Distributions  on this  Certificate  will be made by the  Trustee  by
check mailed to the address of the Holder hereof entitled thereto at the address
appearing  in the  Certificate  Register  or,  if such  Holder  holds all of the
Certificates of this Class,  by wire transfer in immediately  available funds to
the account of such  Certificateholder  designated  in writing to the Trustee at
least five Business Days prior to the  applicable  Record Date.  Notwithstanding
the above,  the final  distribution on this  Certificate  will be made after due
notice of the pendency of such final distribution and only upon presentation and
surrender of this Certificate at the office or agency designated in such notice.

           The Agreement  permits,  with certain exceptions as therein provided,
the amendment  thereof and the modification of the rights and obligations of the
Depositor  and the  Trustee and the rights of the  Certificateholders  under the
Agreement at any time by the  Depositor  and the Trustee with the consent of the
Holders of  Certificates  evidencing  Voting  Rights  aggregating  not less than
66-2/3% of the Voting Rights of all the Certificates; PROVIDED, HOWEVER, that no
such  amendment  may (i) reduce in any manner the amount of, delay the timing of
or change the manner in which  payments  received on Mortgage Loans are required
to be  distributed  in respect of any  Certificate  without  the  consent of the
Holder of such  Certificate,  (ii) adversely  affect in any material respect the
interests  of the Holders of a Class of  Certificates  in a manner other than in
(i) above without the consent of the Holders of Certificates evidencing not less
than 66-2/3% of the Voting  Rights of such Class and (iii) reduce the  aforesaid
percentages  of Voting  Rights,  the holders of which are required to consent to
any such  amendment,  without the consent of 100% of the Holders of Certificates
of the  Class  affected  thereby.  Any  such  consent  by  the  Holder  of  this
Certificate  shall be conclusive  and binding on such Holder and upon all future
Holders of this  Certificate  and of any  Certificate  issued upon the  transfer
hereof or in exchange  herefor or in lieu hereof whether or not notation of such
consent is made upon this Certificate.


                                      B-3
<PAGE>

The Agreement  also permits the Depositor and the Trustee to amend certain terms
and conditions set forth in the Agreement  without the consent of Holders of the
Certificates.  At any time that any of the Class A Certificates are outstanding,
[___]% of all Voting  Rights  will be  allocated  to the  Holders of the Class A
certificates,  in proportion  to their then  outstanding  Certificate  Principal
Balances,  [__]% of all Voting  Rights will be  allocated  to the Holders of the
Class S  Certificates,  [__]% of all  Voting  Rights  will be  allocated  to the
Holders of the Class R-I  Certificates  and [__]% of all Voting  Rights  will be
allocated to the Holders of the Class R-II Certificates.

           As  provided  in the  Agreement  and  subject to certain  limitations
therein  set forth,  the  transfer of this  Certificate  is  registrable  on the
Certificate  Register upon surrender of this  Certificate  for  registration  of
transfer  at the  office or  agency of the  Trustee  designated  therefor,  duly
endorsed  by, or  accompanied  by a written  instrument  of  transfer  in a form
satisfactory  to the Trustee duly executed by the Holder hereof or such Holder's
attorney duly authorized in writing,  and thereupon one or more new Certificates
of the same Class and of authorized  denominations,  and for the same  aggregate
interest  in the  Trust  Fund will be issued  to the  designated  transferee  or
transferees.

           The Class S Certificates  will be issued in fully  registered form in
minimum Percentage  Interests of 20% and integral multiples thereof. As provided
in the  Agreement  and subject to certain  limitations  therein set forth,  this
Certificate is exchangeable  for one or more new  Certificates of the same Class
and of authorized  Percentage  Interests  evidencing a like aggregate Percentage
Interest, as requested by the Holder surrendering the same.

           No service charge will be made for such registrations of transfers or
exchanges,  but the Trustee may require payment of a sum sufficient to cover any
tax or other governmental  charge payable in connection  therewith.  The Trustee
and any agent of the Trustee may treat the person in whose name this Certificate
is registered as the owner hereof for all purposes,  and neither the Trustee nor
any such agent thereof shall be affected by notice to the contrary.

           The obligations and responsibilities of the Depositor and the Trustee
created by the Agreement  will terminate upon the earlier of (a) the purchase by
the  Servicer  from the  Trust  Fund of all  remaining  Mortgage  Loans  and all
property  acquired in respect of such Mortgage  Loans,  thereby  effecting early
retirement of the Certificates, or (b) the maturity or other liquidation (or any
advance with respect  thereto) of the last Mortgage Loan  remaining in the Trust
Fund and the  disposition of all property  acquired upon  foreclosure or deed in
lieu of  foreclosure  of any Mortgage  Loan. As provided in the  Agreement,  the
right to  purchase  all  Mortgage  Loans  pursuant  to clause (a) above shall be
conditioned  upon the unpaid  Principal  Balances of such Mortgage Loans, at the
time of any such repurchase, aggregating less than 5% of the aggregate Principal
Balances thereof as of the Cut-off Date.

           Any term used herein that is defined in the Agreement  shall have the
meaning  assigned  in  the  Agreement,   and  nothing  herein  shall  be  deemed
inconsistent  with that meaning.  If the terms hereof are inconsistent  with the
Agreement, the Agreement shall control.



                                      B-4
<PAGE>

           Unless the certificate of authentication  hereon has been executed by
or on behalf of the Trustee by manual  signature,  this Certificate shall not be
entitled to any benefit under the  Agreement or be valid or  obligatory  for any
purpose.

           The recitals  contained  herein shall be taken as  statements  of the
Depositor and not of the Trustee.  The Trustee assumes no responsibility for the
correctness  of the  statements  contained  in this  Certificate  and  makes  no
representation  as to  the  validity  or  sufficiency  of  the  Agreement,  this
Certificate, any Mortgage Loan or any related document.

           IN WITNESS  WHEREOF,  the Trustee has caused this  Certificate  to be
duly executed under its corporate seal.

                               [__________________________], solely as Trustee
                               and not individually



                               By:  ______________________
                                    Authorized Officer

                          CERTIFICATE OF AUTHENTICATION

This is one of the Certificates referred to in the within-mentioned Agreement.

Date:
       ----------------------




[--------------------------],
as Trustee

By:------------------------
    Authorized Officer




                                      B-5
<PAGE>




                                   ASSIGNMENT

     FOR  VALUE  RECEIVED  the  undersigned   hereby   sell(s),   assign(s)  and
transfer(s) unto _______________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
(Please  print or typewrite  name and  address,  including  postal zip code,  or
assignee)  the  undivided  interest  in the Trust Fund  evidenced  by the within
Certificate  and  hereby  authorize(s)  the  transfer  of  registration  of such
interest to the assignee on the Certificate Register.

      I (we) further  direct the Trustee to issue a new  Certificate of the same
Class and of a like Percentage Interest and undivided interest in the Trust Fund
to the  above-named  assignee and to deliver such  Certificate  to the following
address:

Dated:______________


________________________            ________________________________
Social Security or                  Signature by or on behalf of
other Tax Identification            assignor  (signature must be
                                    signed as registered)
No. of Assignee
                                    _____________________________
                                    Signature Guaranteed

                            DISTRIBUTION INSTRUCTIONS

           The assignee  should include the following for the information of the
Master Servicer:

     Distribution  shall be made by check  mailed  to  _________________________
______________________________________________________________________________,
or if the Percentage  Interest  within such Class is 100%, and the Trustee shall
have received  appropriate wiring instructions in accordance with the Agreement,
by wire transfer in immediately  available  funds to  _______________________the
account of , account number  _________________.  This information is provided by
the assignee named above, or its agent.


                                      B-6
<PAGE>

                                    EXHIBIT C

                           FORM OF CLASS R CERTIFICATE

THIS  CERTIFICATE  HAS NOT BEEN AND WILL NOT BE REGISTERED  UNDER THE SECURITIES
ACT OF 1933, AS AMENDED (THE "ACT"), OR THE SECURITIES LAWS OF ANY STATE AND MAY
NOT BE RESOLD OR  TRANSFERRED  UNLESS IT IS REGISTERED  PURSUANT TO SUCH ACT AND
LAWS OR IS SOLD OR TRANSFERRED IN TRANSACTIONS THAT ARE EXEMPT FROM REGISTRATION
UNDER SUCH ACT AND UNDER  APPLICABLE  STATE LAW AND IS TRANSFERRED IN ACCORDANCE
WITH THE PROVISIONS OF SECTION 6.02 OF THE AGREEMENT REFERRED TO HEREIN.

SOLELY FOR U.S.  FEDERAL  INCOME TAX PURPOSES,  THIS  CERTIFICATE IS A "RESIDUAL
INTEREST"  IN A "REAL  ESTATE  MORTGAGE  INVESTMENT  CONDUIT" AS THOSE TERMS ARE
DEFINED, RESPECTIVELY, IN SECTIONS 860G AND 860D OF THE INTERNAL REVENUE CODE OF
1986 (THE  "CODE").  THIS  CERTIFICATE  MAY NOT BE  TRANSFERRED  TO A NON-UNITED
STATES PERSON.

THIS  CERTIFICATE  DOES NOT  REPRESENT  AN INTEREST IN OR  OBLIGATION  OF CREDIT
SUISSE FIRST BOSTON MORTGAGE  SECURITIES CORP. OR THE TRUSTEE REFERRED TO BELOW,
OR OF ANY OF THEIR AFFILIATES.  THIS CERTIFICATE IS NOT GUARANTEED OR INSURED BY
ANY GOVERNMENT AGENCY OR INSTRUMENTALITY.

ANY SALE,  TRANSFER OR OTHER DISPOSITION OF THIS CLASS [R-I] [R-II]  CERTIFICATE
MAY BE MADE ONLY IF THE PROPOSED TRANSFEREE PROVIDES A TRANSFER AFFIDAVIT TO THE
TRUSTEE TO THE EFFECT THAT (1) SUCH  TRANSFEREE  AGREES TO BE BOUND BY THE TERMS
OF THE AGREEMENT  AND ALL  RESTRICTIONS  SET FORTH ON THE FACE HEREOF,  (2) SUCH
TRANSFEREE  IS NOT  EITHER  (A)  THE  UNITED  STATES,  ANY  STATE  OR  POLITICAL
SUBDIVISION THEREOF, ANY FOREIGN GOVERNMENT, ANY INTERNATIONAL ORGANIZATION,  OR
ANY AGENCY OR  INSTRUMENTALITY  OF ANY OF THE  FOREGOING,  (B) ANY  ORGANIZATION
(OTHER THAN A COOPERATIVE  DESCRIBED IN SECTION 521 OF THE CODE) WHICH IS EXEMPT
FROM THE TAX  IMPOSED  BY  CHAPTER 1 OF THE CODE  UNLESS  SUCH  ORGANIZATION  IS
SUBJECT  TO THE TAX  IMPOSED BY SECTION  511 OF THE CODE,  (C) ANY  ORGANIZATION
DESCRIBED IN SECTION  1381(a)(2)(C)  OF THE CODE, (ANY SUCH PERSON  DESCRIBED IN
THE  FOREGOING  CLAUSES  (A),  (B) OR (C)  BEING  HEREINAFTER  REFERRED  TO AS A
"DISQUALIFIED ORGANIZATION") OR (D) AN AGENT OF A DISQUALIFIED ORGANIZATION, AND
(3) NO  PURPOSE  OF SUCH  TRANSFER  IS TO ENABLE  THE  TRANSFEROR  TO IMPEDE THE
ASSESSMENT  OR  COLLECTION  OF  TAX.  SUCH  AFFIDAVIT   SHALL  INCLUDE   CERTAIN
REPRESENTATIONS AS TO THE FINANCIAL CONDITION OF THE PROPOSED TRANSFEREE.

NO TRANSFER OF THIS CERTIFICATE MAY BE MADE TO AN EMPLOYEE BENEFIT OR OTHER PLAN
SUBJECT TO THE  EMPLOYEE  RETIREMENT  INCOME  SECURITY


                                      C-1
<PAGE>


ACT OF 1974,  AS  AMENDED  ("ERISA"),  OR  SECTION  4975 OF THE CODE  UNLESS THE
TRANSFEREE PROVIDES AN OPINION OF COUNSEL  SATISFACTORY TO THE DEPOSITOR AND THE
TRUSTEE  THAT THE PURCHASE OF THIS  CERTIFICATE  BY OR ON BEHALF OF SUCH PLAN IS
PERMISSIBLE  UNDER  APPLICABLE  LAW AND  WILL  NOT  CONSTITUTE  OR  RESULT  IN A
NON-EXEMPT PROHIBITED TRANSACTION UNDER SECTION 406 OF ERISA AND SECTION 4975 OF
THE CODE.


                                      C-2
<PAGE>

                             [--------------------]
                    MORTGAGE-BACKED PASS-THROUGH CERTIFICATE

                      SERIES 200_-____, CLASS [R-I] [R-II]

Evidencing an undivided  interest in a Trust Fund whose assets consist of a pool
of adjustable-rate,  conventional  mortgage loans secured by first liens on one-
to four-family,  residential  real properties and certain other property held in
trust transferred by

              CREDIT SUISSE FIRST BOSTON MORTGAGE SECURITIES CORP.



Certificate  No.[R-I-  ] [R-II-__]        100% PERCENTAGE INTEREST
                                               REPRESENTED BY THIS
                                               CERTIFICATE

First Distribution Date:                       Final Scheduled
[_________, 200_]                              Distribution Date:


     THIS CERTIFIES THAT ____________________________ is the registered owner of
a beneficial  interest in the Trust Fund referred to below  consisting of a pool
of adjustable-rate conventional mortgage loans secured by first liens on one- to
four-family residential real properties (the "Mortgage Loans") and certain other
property  held in trust  transferred  to the Trust Fund by Credit  Suisse  First
Boston  Mortgage  Securities  Corp.  (the  "Depositor"),   and  certain  related
property.  The Trust Fund was created  pursuant  to the  Pooling  and  Servicing
Agreement, dated as of [_________, 200_] (the "Agreement"), among the Depositor,
[________________________],  as trustee (the "Trustee",  which term includes any
successor  entity under the  Agreement) and  [_________________],  as seller and
servicer, a summary of certain of the pertinent provisions of which is set forth
herein. This Certificate is issued under and is subject to the terms, provisions
and  conditions  of the  Agreement,  to  which  Agreement  the  Holder  of  this
Certificate by virtue of the acceptance  hereof assents and by which such Holder
is bound.

     This  Certificate  is one of a duly  authorized  issue of  certificates  by
Credit  Suisse  First  Boston  Mortgage  Securities  Corp.   designated  as  the
[_______________]  Mortgage-Backed  Pass-Through Certificates,  Series 200_-____
(the "Certificates"), which is comprised of the following four Classes: Class A,
Class S, Class R-I and Class R-II. Reference is hereby made to the Agreement for
a statement of the respective rights thereunder of the Depositor and the Trustee
and the Holders of the  Certificates  and the terms upon which the  Certificates
are authenticated and delivered.  This Certificate represents an interest in the
Trust Fund,  which Trust Fund consists of, among other things,  (i) the Mortgage
Loans and all  distributions  thereon  payable  after the Cut-off  Date,  net of
certain  amounts in accordance  with the provisions of the  Agreement,  (ii) the
Certificate  Account and the Custodial Account and all amounts deposited therein
pursuant to the applicable  provisions of the  Agreement,  net of any investment
earnings thereon, (iii) the interest of the Trust Fund in any insurance policies
with respect to the Mortgage  Loans,  (iv) the interest of the Trust Fund in the
Policy issued for the benefit of the Holders of the


                                      C-3
<PAGE>


Class A  Certificates,  (v) the rights of the Depositor  assigned to the Trustee
pursuant to Sections 2.01 and 3.01 of the Agreement and (vi) all proceeds of the
conversion, voluntary or involuntary, of any of the foregoing into cash or other
liquid property.

           This  Class  [R-I]  [R-II]   Certificate   is  not  entitled  to  any
distributions with respect to principal or interest on the Mortgage Loans in the
Trust Fund.

           Not later than each Distribution  Date, the Trustee will send to each
Certificateholder a statement  containing  information  relating to the Mortgage
Loans and payments made to Certificateholders.

           The Agreement  permits,  with certain exceptions as therein provided,
the amendment  thereof and the modification of the rights and obligations of the
Depositor  and the  Trustee and the rights of the  Certificateholders  under the
Agreement at any time by the  Depositor  and the Trustee with the consent of the
Holders of  Certificates  evidencing  Voting  Rights  aggregating  not less than
66-2/3% of the Voting Rights of all the Certificates; PROVIDED, HOWEVER, that no
such  amendment  may (i) reduce in any manner the amount of, delay the timing of
or change the manner in which  payments  received on Mortgage Loans are required
to be  distributed  in respect of any  Certificate  without  the  consent of the
Holder of such  Certificate,  (ii) adversely  affect in any material respect the
interests  of the Holders of a Class of  Certificates  in a manner other than in
(i) above without the consent of the Holders of Certificates evidencing not less
than 66-2/3% of the Voting  Rights of such Class or (iii)  reduce the  aforesaid
percentages  of Voting  Rights,  the holders of which are required to consent to
any such  amendment,  without the consent of 100% of the Holders of Certificates
of the  Class  affected  thereby.  Any  such  consent  by  the  Holder  of  this
Certificate  shall be conclusive  and binding on such Holder and upon all future
Holders of this  Certificate  and of any  Certificate  issued upon the  transfer
hereof or in exchange  herefor or in lieu hereof whether or not notation of such
consent is made upon this Certificate.  The Agreement also permits the Depositor
and the Trustee to amend certain terms and conditions set forth in the Agreement
without the consent of Holders of the Certificates.  At any time that any of the
Class A  Certificates  are  outstanding,  [___]% of all  Voting  Rights  will be
allocated  among  the  Holders  of the  Class A, in  proportion  to  their  then
outstanding  Certificate Principal Balances,  [__]% of all Voting Rights will be
allocated  to the  Holders  of the Class S  Certificates,  [___]% of all  Voting
Rights will be allocated to the Holders of the Class R-I Certificates and [___]%
of all  Voting  Rights  will be  allocated  to the  Holders  of the  Class  R-II
Certificates.

           As  provided  in the  Agreement  and  subject to certain  limitations
therein  set forth,  the  transfer of this  Certificate  is  registrable  on the
Certificate  Register upon surrender of this  Certificate  for  registration  of
transfer  at the  office or  agency of the  Trustee  designated  therefor,  duly
endorsed  by, or  accompanied  by a written  instrument  of  transfer  in a form
satisfactory  to the Trustee duly executed by the Holder hereof or such Holder's
attorney duly authorized in writing,  and thereupon one or more new Certificates
of the same Class and of authorized  denominations,  and for the same  aggregate
interest  in the  Trust  Fund will be issued  to the  designated  transferee  or
transferees.

           The  Class  [R-I]  [R-II]   Certificates  will  be  issued  in  fully
registered form in minimum  Percentage  Interests of 20% and integral  multiples
thereof. As provided in the Agreement and subject to certain limitations therein
set forth,  this Certificate is exchangeable for


                                      C-4
<PAGE>


one or more new  Certificates  of the same  Class and of  authorized  Percentage
Interests evidencing a like aggregate  Percentage Interest,  as requested by the
Holder surrendering the same.

           No service charge will be made for such registrations of transfers or
exchanges,  but the Trustee may require payment of a sum sufficient to cover any
tax or other governmental  charge payable in connection  therewith.  The Trustee
and any agent of the Trustee may treat the person in whose name this Certificate
is registered as the owner hereof for all purposes,  and neither the Trustee nor
any such agent thereof shall be affected by notice to the contrary.

           Pursuant  to the  Agreement,  the  Depositor  will make two  separate
elections  to treat  each of  REMIC I and  REMIC  II as a real  estate  mortgage
investment  conduit (a "REMIC") for federal  income tax purposes.  The Class R-I
Certificates  will be the  "residual  interest"  in  REMIC  I,  the  Class  R-II
Certificates will be the "residual  interest" in REMIC II, and all other Classes
of Certificates will constitute the "regular interests" in REMIC II.

           The obligations and responsibilities of the Depositor and the Trustee
created by the Agreement  will terminate upon the earlier of (a) the purchase by
the  Servicer  from the  Trust  Fund of all  remaining  Mortgage  Loans  and all
property  acquired in respect of such Mortgage  Loans,  thereby  effecting early
retirement of the Certificates, or (b) the maturity or other liquidation (or any
advance with respect  thereto) of the last Mortgage Loan  remaining in the Trust
Fund and the  disposition of all property  acquired upon  foreclosure or deed in
lieu of  foreclosure  of any Mortgage  Loan. As provided in the  Agreement,  the
right to  purchase  all  Mortgage  Loans  pursuant  to clause (a) above shall be
conditioned  upon the unpaid  Principal  Balances of such Mortgage Loans, at the
time of any such repurchase, aggregating less than 5% of the aggregate Principal
Balances thereof as of the Cut-off Date.

           Any term used herein that is defined in the Agreement  shall have the
meaning  assigned  in  the  Agreement,   and  nothing  herein  shall  be  deemed
inconsistent  with that meaning.  If the terms hereof are inconsistent  with the
Agreement, the Agreement shall control.

           Unless the certificate of authentication  hereon has been executed by
or on behalf of the Trustee by manual  signature,  this Certificate shall not be
entitled to any benefit under the  Agreement or be valid or  obligatory  for any
purpose.

           The recitals  contained  herein shall be taken as  statements  of the
Depositor and not of the Trustee.  The Trustee assumes no responsibility for the
correctness  of the  statements  contained  in this  Certificate  and  makes  no
representation  as to  the  validity  or  sufficiency  of  the  Agreement,  this
Certificate, any Mortgage Loan or any related document.


                                      C-5
<PAGE>


           IN WITNESS  WHEREOF,  the Trustee has caused this  Certificate  to be
duly executed under its corporate seal.

                               [____________________________], solely as
                                 Trustee and not individually

                               By:___________________________
                                          Authorized Officer

                          CERTIFICATE OF AUTHENTICATION

This is one of the Certificates referred to in the within-mentioned Agreement.

Date:
       ----------------------





[--------------------------],
as Trustee

By:------------------------
      Authorized Officer


                                      C-6
<PAGE>


                                   ASSIGNMENT

     FOR  VALUE  RECEIVED  the  undersigned   hereby   sell(s),   assign(s)  and
transfer(s) unto  ______________________________________________________________
(Please  print or typewrite  name and  address,  including  postal zip code,  or
assignee)  the  undivided  interest  in the Trust Fund  evidenced  by the within
Certificate  and  hereby  authorize(s)  the  transfer  of  registration  of such
interest to the assignee on the Certificate Register.

      I (we) further  direct the Trustee to issue a new  Certificate of the same
Class and of a like Percentage Interest and undivided interest in the Trust Fund
to the  above-named  assignee and to deliver such  Certificate  to the following
address: _______________________________________________________________________
________________________________________________________________________________




Dated:
       ------------------------

- - - - - - - - -------------------------------     ----------------------------
Social Security or                  Signature by or on behalf of
other Tax Identification            assignor
                                    (signature must be signed as
                                    registered)
No. of Assignee                     ____________________________
                                    Signature Guaranteed


                            DISTRIBUTION INSTRUCTIONS

     The assignee should include the following for the information of the Master
Servicer:

     Distribution  shall be made by check mailed to  __________________________,
or if the Percentage  Interest  within such Class is 100%, and the Trustee shall
have received  appropriate wiring instructions in accordance with the Agreement,
by wire transfer in immediately  available  funds  to___________________________
the  account of ,  account  number  ____________________.  This  information  is
provided by the assignee named above, or its agent.



                                      C-7
<PAGE>

                                    EXHIBIT D

                           SCHEDULE OF MORTGAGE LOANS


                                      D-1
<PAGE>


                                    EXHIBIT E

                    FORM OF INITIAL CERTIFICATION OF TRUSTEE

                            [_________________, 200_]

Credit Suisse First Boston Mortgage Securities Corp.
11 Madison Avenue, 5th Floor
New York, New York  10010

          Re:   Pooling  and   Servicing   Agreement   ("Pooling  and  Servicing
     Agreement") relating to [__________________]  Mortgage-Backed  Pass-Through
     Certificates, Series 200_-___

Ladies and Gentlemen:

           In accordance  with and subject to the  provisions of Section 2.02 of
the  Pooling and  Servicing  Agreement,  the  undersigned,  as  Trustee,  hereby
certifies that, except for the exceptions noted on the schedule attached hereto,
it has (a) received an original Mortgage Note with respect to each Mortgage Loan
listed on the Mortgage Loan Schedule and (b) received an original Mortgage (or a
certified  copy  thereof)  with  respect  to each  Mortgage  Loan  listed on the
Mortgage  Loan  Schedule  in  accordance  with  Section  2.01 of the Pooling and
Servicing  Agreement.  The Trustee has made no  independent  examination  of any
documents  contained  in each  Mortgage  File  beyond  the  review  specifically
mentioned above. The Trustee makes no  representations  as to: (i) the validity,
legality,  sufficiency,  enforceability  or  genuineness of any of the documents
delivered in accordance with Section 2.01 of the Pooling and Servicing Agreement
or any of the Mortgage Loans  identified in the Mortgage Loan Schedule,  or (ii)
the  collectibility,  insurability,  effectiveness  or  suitability  of any such
Mortgage Loan.

           The Trustee  acknowledges  receipt of notice that the  Depositor  has
granted to the  Trustee  for the  benefit of the  Certificateholders  a security
interest  in all of the  Depositor's  right,  title and  interest  in and to the
Mortgage Loans.

           Capitalized  terms  used  herein  without  definition  shall have the
meaning assigned to them in the Pooling and Servicing Agreement.

                               [___________________________],
                                as Trustee


                               By:___________________________
                                  Authorized Representative



                                      E-1
<PAGE>


                                    EXHIBIT F

                     FORM OF FINAL CERTIFICATION OF TRUSTEE

                                     [date]

Credit Suisse First Boston Mortgage Securities Corp.
11 Madison Avenue, 5th Floor
New York, New York 10010

          Re:   Pooling  and   Servicing   Agreement   ("Pooling  and  Servicing
     Agreement") relating to [___________________]  Mortgage-Backed Pass-Through
     Certificates, Series 200_-___

Ladies and Gentlemen:

      In  accordance  with and subject to the  provisions of Section 2.02 of the
above-referenced  Pooling and Servicing  Agreement the undersigned,  as Trustee,
hereby certifies that,  except for the exceptions noted on the schedule attached
hereto,  as to each  Mortgage  Loan listed in the Mortgage  Loan Schedule it has
reviewed the Mortgage File and has  determined  that (based solely on its review
of each such  documents  on its face) (i) all  documents  described  in  clauses
(i)-(v)  of Section  2.01 of the  Pooling  and  Servicing  Agreement  are in its
possession,  (ii)  such  documents  have been  reviewed  by it and have not been
mutilated,  damaged,  defaced,  torn or  otherwise  physically  altered and such
documents  relate to such  Mortgage  Loan and (iii) each  Mortgage Note has been
endorsed  and each  assignment  of Mortgage  has been  delivered  as provided in
Section  2.01 of the Pooling and  Servicing  Agreement.  The Trustee has made no
independent  examination of any documents required to be delivered in accordance
with  Section  2.01 of the Pooling  and  Servicing  Agreement  beyond the review
specifically  required therein.  The Trustee makes no representations as to: (i)
the validity, legality, sufficiency, enforceability or genuineness of any of the
documents  required to be  delivered  in  accordance  with  Section  2.01 of the
Pooling and Servicing  Agreement or any of the Mortgage Loans  identified on the
Mortgage Loan Schedule, or (ii) the collectibility,  insurability, effectiveness
or suitability of any such Mortgage Loan.


                                      F-1
<PAGE>

      Capitalized  terms  used  herein  without  definition  have  the  meanings
ascribed to them in the Pooling and Servicing Agreement.

                               [____________________________],
                                as Trustee


                               By:____________________________
                                  Authorized Representative

                                      F-2
<PAGE>



                                    EXHIBIT G

                           FORM OF REQUEST FOR RELEASE

                                     [date]

To:

           In connection with the  administration  of the Mortgage Loans held by
you  as  Trustee  under  the  Pooling  and  Servicing   Agreement  dated  as  of
[__________,  200_],  between  Credit  Suisse First Boston  Mortgage  Securities
Corp.,   as  Depositor,   and  you,  as  Trustee  (the  "Pooling  and  Servicing
Agreement"), the undersigned hereby requests a release of the Mortgage File held
by you as Trustee with respect to the following  described Mortgage Loan for the
reason indicated below.

Mortgagor's Name:

Address:

Loan No.:

Reason for requesting file:

____        1. Mortgage Loan paid in full.
               (The  Servicer  hereby  certifies  that all  amounts  received in
               connection  with the Mortgage  Loan have been or will be credited
               to the Certificate  Account pursuant to the Pooling and Servicing
               Agreement.)

____       2. Mortgage Loan repurchased.

              (The Servicer  hereby  certifies that the Purchase Price has been
              credited to the Certificate  Account  pursuant to the Pooling and
              Servicing Agreement.)

____       3. The Mortgage Loan is being foreclosed.

____       4. Other.  (Describe)

      The undersigned  acknowledges that the above Mortgage File will be held by
the  undersigned in accordance  with the provisions of the Pooling and Servicing
Agreement  and will be returned,  except if the  Mortgage  Loan has been paid in
full or  repurchased  (in which case the  Mortgage  File will be  retained by us
permanently) when no longer required by us for such purpose.

      Capitalized  terms used herein shall have the meanings ascribed to them in
the Pooling and Servicing Agreement.


                                      G-1
<PAGE>



                               [SERVICER]

                               By:_______________________________
                                  Name:
                                  Title:



                                      G-2
<PAGE>


                                    EXHIBIT H

                     FORM OF INVESTOR REPRESENTATION LETTER

                                     [date]

Credit Suisse First Boston Mortgage Securities Corp.
11 Madison Avenue, 5th Floor
New York, New York  10010


[---------------------]
[---------------------]
[---------------------]

           Re:  [__________________]        Mortgage-Backed       Pass-Through
                Certificates, Series 200_-___

Ladies and Gentlemen:

      [_] (the  "Purchaser")  intends to purchase  from [_] (the  "Seller")  the
[_________________]  Mortgage-Backed Pass-Through Certificates, Series 200_-____
[Class S] [Class  R-I]  [Class  R-II]  (together,  the  "Certificates"),  issued
pursuant to the Pooling and  Servicing  Agreement  (the  "Pooling and  Servicing
Agreement"),  dated as of  [__________,  200_] among Credit  Suisse First Boston
Mortgage  Securities Corp., as Depositor (the "Company"),  [__________________],
as seller and servicer, and [____________________],  as trustee (the "Trustee").
All terms used herein and not  otherwise  defined  shall have the  meanings  set
forth in the Pooling and Servicing  Agreement.  The Purchaser hereby  certifies,
represents  and warrants  to, and  covenants  with,  the Company and the Trustee
that:

           1. The Purchaser  understands that (a) the Certificates have not been
and will not be registered  or qualified  under the  Securities  Act of 1933, as
amended (the "Act") or any state securities law, (b) the Company is not required
to so register or qualify the  Certificates,  (c) the Certificates may be resold
only if registered  and qualified  pursuant to the  provisions of the Act or any
state   securities  law,  or  if  an  exemption  from  such   registration   and
qualification  is available,  (d) the Pooling and Servicing  Agreement  contains
restrictions regarding the transfer of the Certificates and (e) the Certificates
will bear a legend to the foregoing effect.

           2. The  Purchaser is acquiring the  Certificates  for its own account
for  investment  only and not with a view to or for sale in connection  with any
distribution  thereof in any manner that would violate the Act or any applicable
state securities laws.

           3. The Purchaser is (a) a  substantial,  sophisticated  institutional
investor having such knowledge and experience in financial and business matters,
and,  in  particular,  in such  matters  related  to  securities  similar to the
Certificates,  such that it is  capable  of  evaluating  the merits and risks of
investment in the  Certificates,  (b) able to bear the economic risks of such an
investment  and (c) an "accredited  investor"  within the meaning of Rule 501(a)
promulgated pursuant to the Act.

                                      H-1
<PAGE>

           4. The Purchaser has been furnished  with, and has had an opportunity
to review (a) a copy of the Pooling and  Servicing  Agreement and (b) such other
information  concerning the Certificates,  the Mortgage Loans and the Company as
has been  requested  by the  Purchaser  from the  Company  or the  Seller and is
relevant to the Purchaser's decision to purchase the Certificates. The Purchaser
has had any  questions  arising from such review  answered by the Company or the
Seller to the satisfaction of the Purchaser.

           5. The  Purchaser  has not and will not nor has it authorized or will
it  authorize  any person to (a) offer,  pledge,  sell,  dispose of or otherwise
transfer any  Certificate,  any interest in any Certificate or any other similar
security to any person in any manner,  (b) solicit any offer to buy or to accept
a pledge, disposition of other transfer of any Certificate,  any interest in any
Certificate  or any other similar  security  from any person in any manner,  (c)
otherwise approach or negotiate with respect to any Certificate, any interest in
any Certificate or any other similar security with any person in any manner, (d)
make any general  solicitation  by means of general  advertising or in any other
manner or (e) take any other  action,  that (as to any of (a) through (e) above)
would  constitute a distribution  of any  Certificate  under the Act, that would
render the disposition of any Certificate a violation of Section 5 of the Act or
any state  securities law, or that would require  registration or  qualification
pursuant thereto.  The Purchaser will not sell or otherwise  transfer any of the
Certificates,  except in  compliance  with the  provisions  of the  Pooling  and
Servicing Agreement.

           6.   The Purchaser

           (a)  is  not  an  employee  benefit  or  other  plan  subject  to the
prohibited transaction provisions of the Employee Retirement Income Security Act
of 1974, as amended  ("ERISA"),  or Section 4975 of the Internal Revenue Code of
1986,  as amended (the "Code") (a "Plan"),  or any other  person  (including  an
investment manager, a named fiduciary or a trustee of any Plan) acting, directly
or indirectly,  on behalf of or purchasing any Certificate with "plan assets" of
any Plan; or

           (b) is an insurance company,  the source of funds to be used by it to
purchase the Certificates is an "insurance  company general account" (within the
meaning of Department of Labor Prohibited  Transaction Class Exemption  ("PTCE")
95-60),  and the purchase is being made in reliance upon the availability of the
exemptive relief afforded under Section III of PTCE 95-60.

                               Very truly yours,

                               [Purchaser]


                               By:
                                  Name:__________________
                                  Title:


                                      H-2
<PAGE>


                                    EXHIBIT I

                    FORM OF TRANSFEROR REPRESENTATION LETTER

                                     [date]

Credit Suisse First Boston Mortgage Securities Corp.
11 Madison Avenue, 5th Floor
New York, New York  10010

[---------------------]
[---------------------]
[---------------------]

          Re:    [_________________________]     Mortgage-Backed    Pass-Through
     Certificates, Series 200_-___

Ladies and Gentlemen:

      In connection with the sale by [_] (the "Seller") to [_] (the "Purchaser")
the  [__________________]   Mortgage-Backed  Pass-Through  Certificates,  Series
200_-____  [Class S] [Class R-I] [Class R-II]  (together,  the  "Certificates"),
issued  pursuant  to the Pooling  and  Servicing  Agreement  (the  "Pooling  and
Servicing Agreement"),  dated as of [__________, 200_] among Credit Suisse First
Boston   Mortgage    Securities    Corp.,   as   Depositor   (the    "Company"),
[___________________],  as seller and  servicer,  and  [__________________],  as
trustee (the "Trustee"),  the Seller hereby  certifies,  represents and warrants
to, and covenants with, the Company and the Trustee that:

      Neither  the  Seller nor  anyone  acting on its  behalf  has (a)  offered,
pledged,  sold,  disposed  of or  otherwise  transferred  any  Certificate,  any
interest in any  Certificate or any other similar  security to any person in any
manner, (b) has solicited any offer to buy or to accept a pledge, disposition or
other transfer of any Certificate,  any interest in any Certificate or any other
similar security from any person in any manner, (c) has otherwise  approached or
negotiated with respect to any  Certificate,  any interest in any Certificate or
any other  similar  security  with any  person in any  manner,  (d) has made any
general  solicitation by means of general advertising or in any other manner, or
(e) has taken any other action,  that (as to any of (a) through (e) above) would
constitute a distribution of the  Certificates  under the Securities Act of 1933
(the "Act"), that would render the disposition of any Certificate a violation of
Section  5 of the  Act or any  state  securities  law,  or  that  would  require
registration or qualification  pursuant thereto. The Seller will not act, in any
manner set forth in the foregoing sentence with respect to any Certificate.  The
Seller has not and will not sell or otherwise  transfer any of the Certificates,
except in compliance with the provisions of the Pooling and Servicing Agreement.

                                      I-1
<PAGE>

                               Very truly yours,

                               [Seller]



                               By:______________________
                                   Name:
                                   Title:



                                      I-2
<PAGE>
                                    EXHIBIT J

                FORM OF INVESTOR TRANSFER AFFIDAVIT AND AGREEMENT

STATE OF        )
                     : ss.:
COUNTY OF       )

     [NAME OF OFFICER], being first duly sworn, deposes and says:

     1. That he is [Title of Officer] or [Name of Owner]  (record or  beneficial
owner  (the  "Owner")  of the Class  [R-I]  [R-II]  Certificates  (the  "Class R
Certificates")),  a  [savings  institution]  [corporation]  duly  organized  and
existing  under the laws of [the State of ] [the  United  States],  on behalf of
which he makes this affidavit and agreement.

     2. That the Owner (i) is not and will not be a "disqualified  organization"
as of [date of  transfer]  within  the  meaning  of  Section  860E(e)(5)  of the
Internal  Revenue Code of 1986, as amended (the  "Code"),  (ii) will endeavor to
remain  other than a  disqualified  organization  for so long as it retains  its
ownership interest in the Class R Certificates, and (iii) is acquiring the Class
R  Certificates  for its own  account or for the  account of another  Owner from
which it has received an affidavit and agreement in substantially  the same form
as this  affidavit and agreement.  A "Permitted  Transferee" is any person other
than  a  "disqualified   organization".   (For  this  purpose,  a  "disqualified
organization"  means  the  United  States,  any state or  political  subdivision
thereof,  any agency or  instrumentality  of any of the foregoing (other than an
instrumentality  all of the  activities of which are subject to tax and,  except
for the Federal  Home Loan  Mortgage  Corporation,  a majority of whose board of
directors  is not  selected  by any such  governmental  entity)  or any  foreign
government,  international organization or any agency or instrumentality of such
foreign government or organization, any rural electric or telephone cooperative,
or any organization (other than certain farmers' cooperatives) that is generally
exempt from federal income tax unless such organization is subject to the tax on
unrelated business taxable income).

     3.  That the  Owner  is aware  (i) of the tax  that  would  be  imposed  on
transfers of Class R Certificates to disqualified  organizations under the Code;
(ii) that such tax would be on the  transferor,  or, if such transfer is through
an  agent  (which  person  includes  a  broker,  nominee  or  middleman)  for  a
non-Permitted  Transferee,  on the agent; (iii) that the person otherwise liable
for the  tax  shall  be  relieved  of  liability  for the tax if the  transferee
furnishes  to such  person  an  affidavit  that the  transferee  is a  Permitted
Transferee  and,  at the time of  transfer,  such  person  does not have  actual
knowledge  that the affidavit is false;  and (iv) that the Class R  Certificates
may  be  "noneconomic   residual  interests"  within  the  meaning  of  Treasury
regulations  promulgated  pursuant  to the Code and  that  the  transferor  of a
noneconomic  residual interest will remain liable for any taxes due with respect
to the  income  on such  residual  interest,  if a  significant  purpose  of the
transfer was to enable the  transferor to impede the assessment or collection of
tax.

                                      J-1
<PAGE>

     4. That the Owner is aware of the tax  imposed on a  "pass-through  entity"
holding  Class R  Certificates  if at any time  during the  taxable  year of the
pass-through  entity a  non-Permitted  Transferee  is the  record  holder  of an
interest in such entity.  (For this purpose,  a "pass through entity" includes a
regulated  investment  company,  a real estate  investment trust or common trust
fund, a partnership, trust or estate, and certain cooperatives.)

     5. That the Owner is aware that the Trustee  will not register the Transfer
of any Class R Certificates  unless the transferee,  or the transferee's  agent,
delivers to it an affidavit and agreement,  among other things, in substantially
the same form as this affidavit and agreement.  The Owner expressly  agrees that
it will not consummate any such transfer if it knows or believes that any of the
representations contained in such affidavit and agreement are false.

     6. That the Owner has  reviewed the  restrictions  set forth on the face of
the Class R  Certificates  and the provisions of Section 6.02 of the Pooling and
Servicing  Agreement under which the Class R Certificates were issued. The Owner
expressly  agrees  to be bound  by and to  comply  with  such  restrictions  and
provisions.

     7. That the Owner consents to any additional  restrictions  or arrangements
that shall be deemed necessary upon advice of counsel to constitute a reasonable
arrangement to ensure that the Class R Certificates will only be owned, directly
or indirectly, by an Owner that is a Permitted Transferee.

     8. That the Owner's Taxpayer Identification Number is ______________ .

     9.  That the  Owner is a  citizen  or  resident  of the  United  States,  a
corporation,  partnership  or other entity created or organized in, or under the
laws of, the United States or any political subdivision thereof, or an estate or
trust whose income from sources without the United States is includable in gross
income  for  United  States  federal  income  tax  purposes  regardless  of  its
connection with the conduct of a trade or business within the United States.

     10. That no purpose of the Owner  relating  to the  purchase of the Class R
Certificate by the Owner is or will be to impede the assessment or collection of
tax.

     11. That the Owner has no present  knowledge or expectation that it will be
unable  to  pay  any  United  States  taxes  owed  by it so  long  as any of the
Certificates remain outstanding.

     12. That the Owner has no present  knowledge  or  expectation  that it will
become insolvent or subject to a bankruptcy proceeding for so long as any of the
Certificates remain outstanding.

     13.  That no  purpose  of the  Owner  relating  to any sale of the  Class R
Certificate by the Owner will be to impede the assessment or collection of tax.

                                      J-2
<PAGE>

     14. The Owner hereby  agrees to cooperate  with the Trustee and to take any
action required of it by the Code or Treasury  regulations  thereunder  (whether
now or hereafter promulgated) in order to create or maintain the REMIC status of
the Trust Fund.

     15. The Owner  hereby  agrees  that it will not take any action  that could
endanger the REMIC status of the Trust Fund or result in the  imposition  of tax
on the Trust Fund unless counsel for, or acceptable to, the Trustee has provided
an opinion  that such action will not result in the loss of such REMIC status or
the imposition of such tax, as applicable.

     IN WITNESS WHEREOF,  the Owner has caused this instrument to be executed on
its behalf,  pursuant to the authority of its Board of Directors,  by its [Title
of Officer]  and its  corporate  seal to be hereunto  attached,  attested by its
[Assistant] Secretary, this ____ day of.

                               [NAME OF OWNER]



                               By:_______________________
                                   [Name of Officer]
                                   [Title of Officer]

[Corporate Seal]

ATTEST:
____________________________
[Assistant] Secretary

           Personally  appeared  before me the  above-named  [Name of  Officer],
known  or  proved  to me to be  the  same  person  who  executed  the  foregoing
instrument and to be the [Title of Officer] of the Owner, and acknowledged to me
that he executed  the same as his free act and deed and the free act and deed of
the Owner.



                                      J-3
<PAGE>

     Subscribed and sworn before me this ____ day of _________________.



                                ______________________________
                                NOTARY PUBLIC



                               COUNTY OF______________________
                               STATE OF ______________________

                My   Commission   expires   the ____ day  of  _________ , 20__.




                                     J-4
<PAGE>

                                    EXHIBIT K

                          FORM OF TRANSFER CERTIFICATE

                                     [date]

Credit Suisse First Boston Mortgage Securities Corp.
11 Madison Avenue, 5th Floor
New York, New York 10010


[---------------------]
[---------------------]
[---------------------]

          Re:    [_________________________]     Mortgage-Backed    Pass-Through
                 Certificates,  Series  200_-___,  Class [R-I]
                 [R-II] (the  "CERTIFICATES")

Ladies and Gentlemen:

     This  letter  is  delivered  to  you  in   connection   with  the  sale  by
_____________________ (the "Seller") to _________________ (the "Purchaser") of a
____%  Percentage  Interest in the above  referenced  Certificates,  pursuant to
Section 6.02 of the Pooling and Servicing  Agreement (the "Pooling and Servicing
Agreement"),  dated as of  [___________,  200_] among Credit Suisse First Boston
Mortgage     Securities     Corp.     as    depositor     (the     "Depositor"),
[_______________________], as trustee (the "Trustee") and [________________], as
seller and servicer.  All terms used herein and not otherwise defined shall have
the meanings set forth in the Pooling and Servicing Agreement. The Seller hereby
certifies, represents and warrants to, and covenants with, the Depositor and the
Trustee that:

           1. No purpose of the Seller  relating to sale of the  Certificate  by
the  Seller to the  Purchaser  is or will be to enable  the Seller to impede the
assessment or collection of any tax.

           2. The Seller  understands  that the  Purchaser  has delivered to the
Trustee a transfer  affidavit  and agreement in the form attached to the Pooling
and  Servicing  Agreement as Exhibit J. The Seller does not know or believe that
any representation contained therein is false.

          3. The Seller has no actual knowledge that the proposed  Transferee is
     not a Permitted Transferee.

           4. The Seller has no actual  knowledge  that the  Purchaser  would be
unwilling  or  unable  to pay  taxes  due on its  share  of the  taxable  income
attributable to the Certificate.

           5.  The  Seller  has  conducted  a  reasonable  investigation  of the
financial  condition  of the  Purchaser  and, as a result of the  investigation,
found that the Purchaser has

                                      K-1
<PAGE>

historically paid its debts as they came due, and found no significant  evidence
to indicate that the  Purchaser  will not continue to pay its debts as they come
due in the future.

           6.  The  Purchaser  has  represented  to  the  Seller  that,  if  the
Certificate constitutes a noneconomic residual interest, it (i) understands that
as holder of a noneconomic  residual  interest it may incur tax  liabilities  in
excess of any cash flows  generated  by the  interest,  and (ii)  intends to pay
taxes associated with its holding of the Certificate as they become due.

                               Very truly yours,



                               [SELLER]

                               By:________________________________
                                   Name:
                                   Title:




                                      K-2
<PAGE>

                                 EXHIBIT L

                      CERTIFICATE GUARANTY INSURANCE POLICY





                                                                     Exhibit 4.2

     This   Agreement  (the  "Sale  and  Purchase   Agreement"),   dated  as  of
[___________],  200_,  by  and  between  CREDIT  SUISSE  FIRST  BOSTON  MORTGAGE
SECURITIES   CORP.,   a   Delaware    corporation   (the    "Depositor"),    and
[_________________________], a Delaware [___________] (the "Seller").



                              W I T N E S S E T H:

     WHEREAS,  Exhibit A attached  hereto and made a part hereof  lists  certain
residential  mortgage loans (the "Mortgage  Loans") owned by the Seller that the
Seller  desires  to sell to the  Depositor  and that the  Depositor  desires  to
purchase;

     WHEREAS,  it is  the  intention  of  the  Seller  and  the  Depositor  that
simultaneously  with  the  Seller's  conveyance  of the  Mortgage  Loans  to the
Depositor on the Closing Date, the Depositor shall deposit the Mortgage Loans in
trust  pursuant  to a  Pooling  and  Servicing  Agreement  to  be  dated  as  of
[______________,  200_] (the "Pooling and Servicing  Agreement"),  to be entered
into by and among  the  Depositor,  as  depositor,  the  Seller,  as seller  and
servicer (the Seller or the "Servicer") and [_________________], as trustee (the
"Trustee");

     NOW, THEREFORE,  in consideration of the premises and the mutual agreements
hereinafter set forth, the parties hereto agree as follows:

                                   ARTICLE ONE

                                   DEFINITIONS

     Section 1.01.  Definitions.  Whenever used herein,  the following words and
phrases,  unless  the  context  otherwise  requires,  shall  have  the  meanings
specified in this Article:

     "Agreement" means this Sale and Purchase Agreement, as amended or
supplemented in accordance with the provisions hereof.

     "Closing Date" shall have the meaning ascribed thereto in Section 2.01(c).

     "Commission" means the United States Securities and Exchange Commission.

     "Cut-Off Date" [___________ 1, 200_].

     "Exchange Act" means the Securities Exchange Act of 1934, as amended.

     "List of Mortgage Loans" shall have the meaning ascribed thereto in Section
2.01(b).

     "Mortgage  Loan  Information"  shall have the meaning  ascribed  thereto in
Section 4.14(a)(i).



<PAGE>

     "Prospectus" means the Prospectus,  dated [__________,  200_],  relating to
the  offering  by the  Depositor  from  time  to  time  of  its  Mortgage-Backed
Pass-Through  Certificates  (Issuable  in Series) in the form in which it was or
will be filed with the Securities  Exchange  Commission  pursuant to Rule 424(b)
under the  Securities  Act with  respect  to the  offer and sale of the  Offered
Certificates.

     "Prospectus Supplement" means the Prospectus Supplement, dated [__________,
200_],  relating to the offering of the Certificates in the form in which it was
or  will be  filed  with  the  Commission  pursuant  to Rule  424(b)  under  the
Securities Act with respect to the offer and sale of the Offered Certificates.

     "Registration  Statement" means that certain registration statement on Form
S-3, as amended  (Registration No.  333-______)  relating to the offering by the
Depositor  from time to time of its  Mortgage-Backed  Pass-Through  Certificates
(Issuable in Series) as heretofore declared effective by the Commission.

     "Securities Act" means the Securities Act of 1933, as amended.

     "Seller" means [_____________], in its capacity as Seller of the
Mortgage Loans under this Agreement and any successor  thereto,  whether through
merger,  consolidation,  purchase  and  assumption  thereof  or by  purchase  or
acquisition all or substantially all of its assets or otherwise.

     Capitalized terms used herein that are not otherwise defined shall have the
respective meanings ascribed thereto in the Pooling and Servicing Agreement.

                                   ARTICLE TWO

                 PURCHASE, SALE AND CONVEYANCE OF MORTGAGE LOANS

     Section  2.01.  Agreement  to  Purchase.  (a)  Subject  to  the  terms  and
conditions  of this  Agreement,  the Seller  agrees to sell,  and the  Depositor
agrees to purchase on the Closing Date, the Mortgage Loans.

     (b) Subject to Section 2.07,  the Depositor and the Seller have agreed upon
which of the Seller's  loans are to be purchased by the Depositor on the Closing
Date  pursuant to this  Agreement,  and the Seller has prepared a schedule  (the
"List  of  Mortgage  Loans")  setting  forth  all of the  Mortgage  Loans  to be
purchased under this Agreement, which schedule is attached hereto as Exhibit A.

     (c) The closing for the purchase and sale of the Mortgage  Loans shall take
place at the  offices of  [______________],  at 10:00  a.m.,  New York time,  on
[____________,  200_] or such other  place and time as the  parties  shall agree
(such time being herein referred to as the "Closing Date").

     Section 2.02.  Purchase Price.  On the Closing Date, as full  consideration
for the Seller's sale of the Mortgage Loans to the Depositor, the Depositor will
deliver to the Seller (i) an amount in cash equal to $[___________], all payable
by wire transfer of same day funds [and



                                       2
<PAGE>


(ii) the Class R-I  Certificates  and the Class R-II  Certificates  to be issued
pursuant to the Pooling and Servicing Agreement].

     Section 2.03.  Conveyance of Mortgage Loans;  Possession of Mortgage Files.
On the Closing  Date,  the Seller  shall sell,  transfer,  assign,  set over and
convey to the  Depositor,  without  recourse  but  subject  to the terms of this
Agreement,  all right,  title and interest in and to the Mortgage  Loans and the
other assets  relating  thereto.  Upon  payment of the  purchase  price for such
Mortgage Loans as provided in Section 2.02 of this  Agreement,  the Seller shall
have hereby, and shall be deemed to have, sold, transferred,  assigned, set over
and conveyed such Mortgage Loans and the other related assets.  Upon the sale of
such Mortgage Loans,  the ownership of each related Note, each related  Mortgage
and  the  contents  of the  related  Loan  File  shall  immediately  vest in the
Depositor and the ownership of all related records and documents with respect to
each Mortgage  Loan prepared by or which come into the  possession of the Seller
shall  immediately  vest in the Depositor.  The contents of any Loan File in the
possession of the Seller at any time after such sale, and any scheduled payments
of principal  and interest on the Mortgage  Loans due after the Cut-Off Date and
received by the Seller,  shall be held in trust by the Seller for the benefit of
the  Depositor  as the owner  thereof,  and shall be promptly  delivered  by the
Seller to or upon the order of the Depositor.

     Pursuant to the Pooling and Servicing  Agreement,  the Depositor  shall, on
the  Closing  Date,  assign all of its right,  title and  interest in and to the
Purchased  Loans  and the  other  Purchased  Assets  and the  Seller's  right to
exercise  the  remedies  created by Section 4 of the Loan Sale  Agreement to the
Trustee for the benefit of the Holders of the Certificates.

     Section  2.04.  Delivery of  Mortgage  Loan  Documents.  On or prior to the
Closing  Date,  the Seller  shall  deliver to the  Trustee  (as  assignee of the
Depositor  pursuant  to the  Pooling  and  Servicing  Agreement)  the Loan  File
Documents, as described in the related Pooling and Servicing Agreement.

     All  original  documents  relating  to the  Mortgage  Loans  that  are  not
delivered to the Trustee (as assignee of the  Depositor  pursuant to the Pooling
and Servicing  Agreement) as required by this Section 2.04 are and shall be held
by the Seller in trust for the  benefit of the  Trustee on behalf of the related
Holders of the  Certificates.  In the event that any such  original  document is
required pursuant to the terms of this Section 2.04 to be a part of a Loan File,
such  document  shall be  delivered  promptly to the Trustee (as assignee of the
Depositor pursuant to the Pooling and Servicing Agreement).

     From and after the sale of the  Mortgage  Loans to the  Depositor  pursuant
hereto,  to the extent  that the  Seller  retains  legal  title of record to any
Mortgage  Loans prior to the vesting of legal title in the Trustee (as  assignee
of the Depositor  pursuant to the Pooling and Servicing  Agreement),  such title
shall be retained in trust for the Depositor as the owner of the Mortgage  Loans
and the Trustee, as the Depositor's assignee.

     Section 2.05.  Transfer of Mortgage  Loans;  Assignment  of Agreement.  The
Depositor  has the right to assign  its  interest  under this  Agreement  to the
Trustee as may be required to effect the  purposes of the Pooling and  Servicing
Agreement, without further notice to, or consent of, the Seller, and the Trustee
shall succeed to such of the rights and obligations of



                                       3
<PAGE>

the Depositor hereunder as shall be so assigned.  The Depositor shall,  pursuant
to the  Pooling  and  Servicing  Agreement,  assign all of its right,  title and
interest in and to the Mortgage  Loans and the related assets to the Trustee for
the benefit of the Holders of the Certificates.

     Section  2.06.  Books and Records.  The sale of each Mortgage Loan shall be
reflected on the Seller's balance sheet and other financial statements as a sale
of assets by the Seller for accounting purposes and for tax purposes. The Seller
shall be responsible  for  maintaining,  and shall  maintain,  a complete set of
books and  records  for each  Mortgage  Loan which  shall be  clearly  marked to
reflect the  ownership of each  Mortgage  Loan by the Trustee for the benefit of
the Holders of the Certificates.

     Section  2.07.  Cost of Delivery of  Documents.  The costs  relating to the
delivery of the documents  specified in this Article Two in connection  with the
Mortgage Loans shall be borne by the Seller.



                                       4
<PAGE>



                                  ARTICLE THREE

                                    COVENANTS

     The Seller covenants with the Depositor as follows:

     (a)  The  Seller  shall  cooperate  with  the  Depositor  and  the  firm of
independent  certified public accountants  retained with respect to the issuance
of the  Certificates  in making  available all  information and taking all steps
reasonably necessary to permit the accountants' letters required hereunder to be
delivered within the times set for delivery herein.

     (b) The Seller hereby agrees to do all acts,  transactions,  and things and
to execute and deliver all agreements, documents, instruments, and papers by and
on behalf of the Seller as the Depositor or its counsel may  reasonably  request
in order to consummate  the transfer of the Mortgage  Loans to the Depositor and
the subsequent  transfer  thereof to the Trustee,  and the rating,  issuance and
sale of the Certificates.

     (c) The Seller  hereby  agrees to arrange  separately to pay to the Trustee
all of the  Trustee's  fees and  expenses in  connection  with the  transactions
contemplated  by  the  Pooling  and  Servicing  Agreement  subject  to  existing
agreements to which the Seller assented at an earlier date. For the avoidance of
doubt,  the parties hereto  acknowledge  that it is the intention of the parties
that the  Depositor  shall not pay any of the  Trustee's  fees and  expenses  in
connection  with the  transactions  contemplated  by the Pooling  and  Servicing
Agreement.

                                  ARTICLE FOUR

                                  MISCELLANEOUS

     Section 4.01. Conditions of Depositor's Obligations. The obligations of the
Depositor to purchase the Mortgage Loans will be subject to the  satisfaction on
the Closing Date of the following conditions. Upon payment of the purchase price
for the Mortgage Loans, such conditions shall be deemed satisfied or waived.

     (a) Each of the obligations of the Seller required to be performed by it on
or prior to the Closing  Date  pursuant to the terms of this  Agreement  and the
Pooling and Servicing Agreement shall have been duly performed and complied with
in all material  respects and all of the  representations  and warranties of the
Seller under this  Agreement  and the Pooling and Servicing  Agreement  shall be
true and correct in all  material  respects as of the Closing  Date and no event
shall have occurred which,  with notice or the passage of time, would constitute
a default under this Agreement or the Pooling and Servicing  Agreement,  and the
Depositor  shall have  received  a  certificate  to the effect of the  foregoing
signed by an authorized officer of the Seller.

     (b) The  Depositor  shall  have  received  a letter  dated the date of this
Agreement,  in form and substance reasonably acceptable to the Depositor and its
counsel,   prepared  by   [__________________],   independent  certified  public
accountants, regarding the



                                       5
<PAGE>

numerical  information contained in the Prospectus Supplement under the captions
"Certain Yield and Prepayment Considerations" and "The Mortgage Loan Pools."

     (c) The Mortgage Loans will be reasonably  acceptable to the Depositor,  in
its sole discretion.

     (d) The  Depositor  shall have received the  following  additional  closing
documents, in form and substance satisfactory to the Depositor and its counsel:

     (i) the List of Mortgage Loans;

     (ii) the Pooling and Servicing Agreement, dated as of [___________,  200_],
and  the  Underwriting  Agreement,  dated  as  of  [_____________,   200_]  (the
"Underwriting Agreement"),  between the Depositor and Credit Suisse First Boston
Corporation and all documents required  thereunder,  duly executed and delivered
by each of the parties thereto other than the Depositor;

     (iii)an officer's  certificate of an officer of the Seller, dated as of the
Closing Date, in the form of Exhibit B hereto, and attached thereto  resolutions
of the board of directors and a copy of the charter and by-laws;

     (iv)  an  officer's  certificate  of an  officer  of the  Seller  that  the
representations  and  warranties  of the Seller and  Servicer  herein and in the
Pooling  and  Servicing  Agreement  are true and  correct as of the date of this
Agreement;

     (v) a copy of the  Seller's  charter  and all  amendments,  revisions,  and
supplements thereof, certified by an officer of such entity;

     (vi) an opinion  of the  counsel  for the  Seller as to  various  corporate
matters  substantially in the form attached hereto as Exhibit C (it being agreed
that the opinion shall  expressly  provide that the Trustee shall be entitled to
rely on the opinion);

     (vii)letters  from the Rating  Agencies that they have assigned  ratings to
the Certificates as described in the Prospectus Supplement;

     (viii)  an  opinion  of  counsel  for the  Trustee  in form  and  substance
acceptable  to the  Depositor,  its  counsel,  and each Rating  Agency (it being
agreed  that the  opinion  shall  expressly  provide  that the  Seller  shall be
entitled to rely on the opinion); and

     (ix) an  opinion  or  opinions  of counsel  for the  Servicer,  in form and
substance acceptable to the Depositor, its counsel, and each Rating Agency.

     (e) All  documents  contemplated  by this  Agreement  and the  Pooling  and
Servicing Agreement shall be satisfactory in form and substance to the Depositor
and its counsel.

     (f)  The  Seller  shall  have  furnished  the  Depositor  with  such  other
certificates  of its officers or others and such other  documents or opinions as
the Depositor or its counsel may reasonably request.



                                       6
<PAGE>


     Section 4.02.  Conditions of Seller's  Obligations.  The obligations of the
Seller under this Agreement shall be subject to the satisfaction, on the Closing
Date, of the following conditions:

           (a) Each of the obligations of the Depositor required to be performed
by it at or prior to the Closing  Date  pursuant to the terms of this  Agreement
and the Pooling  and  Servicing  Agreement  shall have been duly  performed  and
complied  with and all of the  representations  and  warranties of the Depositor
contained in this  Agreement  and the Pooling and Servicing  Agreement  shall be
true and correct as of the  Closing  Date and the Seller  shall have  received a
certificate to that effect signed by an authorized officer of the Depositor.

          (b)  The  Seller  shall  have   received  the  Pooling  and  Servicing
     Agreement, and all documents required thereunder,  in each case executed by
     the Depositor as applicable.

     Section 4.03.  Termination  of Depositor's  Obligations.  The Depositor may
terminate its  obligations  hereunder by notice to the Seller at any time before
delivery of and payment of the purchase price for the Mortgage Loans if: (i) any
of the  conditions  described  in  Section  4.01 are not  satisfied  when and as
provided therein; (ii) there shall have been the entry of a decree or order by a
court or agency or supervisory authority having jurisdiction in the premises for
the  appointment  of a  conservator,  receiver or liquidator in any  insolvency,
readjustment  of  debt,   marshalling  of  assets  and  liabilities  or  similar
proceedings of or relating to the Seller or the Servicer,  or for the winding up
or liquidation  of the affairs of the Seller or the Servicer;  (iii) there shall
have been the  consent by the Seller or the  Servicer  to the  appointment  of a
conservator or receiver or liquidator in any  insolvency,  readjustment of debt,
marshalling of assets and  liabilities or similar  proceedings of or relating to
the Seller or the Servicer or relating to  substantially  all of the property of
the Seller or the Servicer;  or (iv) the Underwriter  terminates its obligations
under the Underwriting  Agreement (except as a result of a failure solely due to
a matter within the reasonable control of the Depositor). The termination of the
Depositor's  obligations  hereunder shall not terminate the  Depositor's  rights
hereunder  or its right to  exercise  any  remedy  available  to it at law or in
equity.

     Section 4.04. Notices.  All demands,  notices and communications  hereunder
shall be in writing  and shall be deemed to have been duly  given if  personally
delivered to or mailed by registered mail,  postage  prepaid,  or transmitted by
facsimile  and  confirmed  by a similar  mailed  writing,  if to the  Depositor,
addressed to the Depositor at Eleven Madison  Avenue,  New York, New York 10010,
or to such  other  address  as the  Depositor  may  designate  in writing to the
Seller,    and   if   to   the    Seller,    addressed    to   the   Seller   at
[_____________________],  Attention:  [___________________],  or to  such  other
address as the Seller may designate in writing to the Depositor.

           Section  4.05.  Severability  of  Provisions.  Any  part,  provision,
representation,  warranty or covenant of this  Agreement  which is prohibited or
which is held to be void or unenforceable  shall be ineffective to the extent of
such  prohibition  or  unenforceability   without   invalidating  the  remaining
provisions hereof. Any part, provision, representation,  warranty or covenant of
this  Agreement  which is prohibited or  unenforceable  or is held to be void or
unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective
to the extent of such


                                       7
<PAGE>


prohibition or unenforceability  without  invalidating the remaining  provisions
hereof, and any such prohibition or  unenforceability  in any jurisdiction as to
any Mortgage Loan shall not invalidate or render unenforceable such provision in
any other  jurisdiction.  To the extent permitted by applicable law, the parties
hereto  waive  any  provision  of  law  which   prohibits  or  renders  void  or
unenforceable any provision hereof.

     Section 4.06. Agreement of Seller. The Seller agrees to execute and deliver
such  instruments and take such actions as the Depositor may, from time to time,
reasonably request in order to effectuate the purpose and to carry out the terms
of this Agreement.

     Section  4.07.  Survival.  The  parties  to this  Agreement  agree that the
representations,  warranties and  agreements  made by each of them herein and in
any certificate or other instrument delivered pursuant hereto shall be deemed to
be relied  upon by the other party  hereto,  notwithstanding  any  investigation
heretofore  or  hereafter  made by such  other  party or on such  other  party's
behalf,  and that the  representations,  warranties and  agreements  made by the
parties hereto in this Agreement or in any such  certificate or other instrument
shall survive the delivery of and payment for the Mortgage Loans.

     Section  4.08.  Effect of Headings and Table of  Contents.  The Article and
Section  headings herein and the Table of Contents are for convenience  only and
shall not affect the construction hereof.

     Section 4.09.  Successors and Assigns.  This  Agreement  shall inure to the
benefit  of  and be  binding  upon  the  parties  hereto  and  their  respective
successors  and permitted  assigns.  Except as expressly  permitted by the terms
hereof, this Agreement may not be assigned, pledged or hypothecated by any party
hereto to a third party  without the written  consent of the other party to this
Agreement; provided, however, that the Depositor may assign its rights hereunder
to the Trustee on behalf of the Trust without the consent of the Seller.

     Section  4.10.   Governing  Law.  This  Agreement  shall  be  construed  in
accordance  with  and  governed  by the laws of the  State of New York  (without
regard  to  conflicts  of laws  principles),  and the  obligations,  rights  and
remedies of the parties  hereunder  shall be determined in accordance  with such
laws.

     Section  4.11.  Confirmation  of Intent.  It is the  express  intent of the
parties  hereto that the  conveyance of the Mortgage  Loans by the Seller to the
Depositor as  contemplated by this Agreement be, and be treated for all purposes
as, a sale by the Seller to the Depositor of the Mortgage Loans. It is, further,
not the intention of the parties that such  conveyance be deemed a pledge of the
Mortgage  Loans  by the  Seller  to the  Depositor  to  secure  a debt or  other
obligation of the Seller. However, in the event that, notwithstanding the intent
of the parties,  the  Mortgage  Loans are held to continue to be property of the
Seller then: (a) this Agreement shall also be deemed to be a security  agreement
within the meaning of Articles 8 and 9 of the Uniform  Commercial  Code; (b) the
transfer of the Mortgage Loans provided for herein shall be deemed to be a grant
by the Seller to the  Depositor  of a security  interest in all of the  Seller's
right,  title and interest in and to the Mortgage Loans and all amounts  payable
on the Mortgage  Loans in accordance  with the terms thereof and all proceeds of
the  conversion,   voluntary  or  involuntary,   of  the  foregoing  into  cash,
instruments, securities or other property; (c) the possession by the




                                       8
<PAGE>

Depositor of Notes and such other items of property as  constitute  instruments,
money,  negotiable  documents or chattel paper shall be deemed to be "possession
by the secured party" for purposes of perfecting the security  interest pursuant
to Section  9-305 of the  Uniform  Commercial  Code;  and (d)  notifications  to
persons holding such property,  and  acknowledgments,  receipts or confirmations
from  persons  holding  such  property,  shall be  deemed  notifications  to, or
acknowledgments,  receipts  or  confirmations  from,  financial  intermediaries,
bailees or agents (as applicable) of the Depositor for the purpose of perfecting
such security  interest under  applicable law. Any assignment of the interest of
the  Depositor  pursuant to any  provision  hereof shall also be deemed to be an
assignment of any security interest created hereby. The Seller and the Depositor
shall, to the extent consistent with this Agreement, take such actions as may be
necessary to ensure  that,  if this  Agreement  were deemed to create a security
interest in the Mortgage Loans,  such security  interest would be deemed to be a
perfected  security  interest of first priority under applicable law and will be
maintained as such throughout the term of this Agreement.

     Section 4.12. Execution in Counterparts.  This Agreement may be executed in
any number of  counterparts,  each of which so executed shall be deemed to be an
original,  but all such counterparts  shall together  constitute but one and the
same instrument.

     Section 4.13. Costs. In connection with the transactions contemplated under
this  Agreement  and the  Pooling  and  Servicing  Agreement,  the Seller  shall
promptly pay (or shall  promptly  reimburse the Depositor to the extent that the
Depositor shall have paid or otherwise incurred): (a) the fees and disbursements
of the Depositor's counsel up to $[____], plus disbursements up to $[_____]; (b)
the fees of each Rating Agency as separately  agreed; (c) any of the fees of the
Trustee as separately  agreed and the reasonable fees and  disbursements  of the
Trustee's counsel up to $[_____]; (d) reasonable expenses incurred in connection
with  printing the  Prospectus,  the  Prospectus  Supplement,  any  amendment or
supplement thereto,  any preliminary  prospectus and the Certificates;  (e) fees
and expenses relating to the filing of documents with the Commission relating to
the Offered  Certificates  (including without limitation  periodic reports under
the Exchange Act); and (f) the shelf  registration  amortization  fee (which fee
shall equal  [1/33rd of 1%] of the amount of the Offered  Certificates)  paid in
connection with the issuance of  Certificates.  For the avoidance of doubt,  the
parties  hereto  acknowledge  that it is the  intention  of the parties that the
Depositor  shall not pay any of the  Trustee's  fees and expenses in  connection
with the transactions  contemplated by the Pooling and Servicing Agreement.  All
other  costs and  expenses  in  connection  with the  transactions  contemplated
hereunder shall be borne by the party incurring such expenses.

     Section 4.14.  Indemnification.  (a) (i) The Seller agrees to indemnify and
hold harmless the  Depositor,  each of its  directors,  each of its officers who
have  signed the  Registration  Statement,  and each of its  directors  and each
person or entity who  controls  the  Depositor  or any such  person,  within the
meaning of Section 15 of the Securities Act, against any and all losses, claims,
damages or  liabilities,  joint and several,  to which the Depositor or any such
person or entity may become subject, under the Securities Act or otherwise,  and
will reimburse the Depositor and each such  controlling  person for any legal or
other  expenses  incurred  by  the  Depositor  or  such  controlling  person  in
connection  with  investigating  or  defending  any such  loss,  claim,  damage,
liability or action,  insofar as such losses, claims, damages or liabilities (or
actions in respect thereof) arise out of or are based upon any untrue



                                       9
<PAGE>

statement or alleged  untrue  statement of any  material  fact  contained in the
Prospectus Supplement under the headings ["Risk  Factors--Risks  Associated with
the Mortgage Loans" and "The Mortgage Loan Pools";  the "Seller";  the Servicer]
(such  information,  the  "Mortgage  Loan  Information")  or  any  amendment  or
supplement  to  the  Prospectus   Supplement   relating  to  the  Mortgage  Loan
Information, the Seller or the Servicer, or the omission or the alleged omission
to state therein a material  fact required to be stated  therein or necessary to
make the statements in the Prospectus  Supplement or any amendment or supplement
to the Prospectus  Supplement approved in writing by the Seller, in light of the
circumstances  under which they were made, not  misleading;  provided,  however,
that the Seller  will not be liable in any such case to the extent that any such
loss,  claim,  damage or  liability  arises  out of or is based  upon any untrue
statement or alleged  untrue  statement or omission or alleged  omission made in
the  Prospectus  Supplement or any  amendment or supplement  thereto in reliance
upon and in conformity with written  information  furnished to the Seller by the
Underwriter  or the  Depositor  specifically  for use  therein.  This  indemnity
agreement  will be in addition to any  liability  which the Seller may otherwise
have.

     (ii) The Seller  agrees to  indemnify  and to hold the  Depositor  harmless
against any and all claims, losses, penalties,  fines,  forfeitures,  legal fees
and related costs,  judgments,  and any other costs,  fees and expenses that the
Depositor may sustain in any way related to the failure of the Seller to perform
its duties in  compliance  with the terms of this  Agreement.  The Seller  shall
immediately  notify  the  Depositor  if a claim  is made by a third  party  with
respect to this  Agreement,  and the Seller shall assume the defense of any such
claim and pay all expenses in connection therewith, including reasonable counsel
fees,  and promptly pay,  discharge and satisfy any judgment or decree which may
be entered  against  the  Depositor  in respect of such  claim.  Pursuant to the
Pooling and  Servicing  Agreement,  the Trustee  shall  reimburse  the Seller in
accordance with the Pooling and Servicing  Agreement for all amounts advanced by
the Seller  pursuant to the  preceding  sentence  except when the claim  relates
directly to the failure of the Seller to perform its duties in  compliance  with
the terms of this Agreement.

     (b) The Depositor agrees to indemnify and hold harmless the Seller, each of
its  directors  and each  person or entity who  controls  the Seller or any such
person,  within the meaning of Section 15 of the Securities Act, against any and
all losses,  claims,  damages or  liabilities,  joint and several,  to which the
Seller or any such person or entity may become subject, under the Securities Act
or otherwise, and will reimburse the Seller and any such director or controlling
person  for any  legal  or other  expenses  incurred  by such  party or any such
director or controlling person in connection with investigating or defending any
such loss, claim, damage,  liability or action,  insofar as such losses, claims,
damages or liabilities (or actions in respect thereof) arise out of or are based
upon any untrue  statement or alleged  untrue  statement  of any  material  fact
contained  in  the  Registration  Statement,  the  Prospectus,   the  Prospectus
Supplement,  any  amendment or  supplement  to the  Prospectus,  the  Prospectus
Supplement  or the omission or the alleged  omission to state therein a material
fact required to be stated therein or necessary to make the statements  therein,
in light of the  circumstances  under which they were made, not misleading,  but
only to the extent that such untrue  statement  or alleged  untrue  statement or
omission or alleged  omission is other than a statement or omission  relating to
the  information  set forth in  subsection  (a)(i) of this  Section  4.14.  This
indemnity agreement will be in addition to any liability which the Depositor may
otherwise have.




                                       10
<PAGE>

     (c) The Seller shall in addition  indemnify and hold harmless the Depositor
for any losses,  claims,  damages, or liabilities to which it becomes subject in
connection  with the use in  connection  with the  offering  for  resale  of the
Offered  Certificates  of any materials  which would  constitute  "computational
materials",  "collateral term sheets" or "structural term sheets" (collectively,
"Computational Materials") under the Commission's "no-action letter" definitions
of such terms as of the date hereof,  except to the extent that any such losses,
claims,  damages or  liabilities  result from the negligence of the Depositor in
the preparation of such Computational  Materials.  The Depositor shall indemnify
and hold  harmless  the Seller for any losses,  claims,  damages or  liabilities
which result from the  negligence  of the Depositor in the  preparation  of such
Computational Materials, provided that in no event shall the Depositor be liable
to the Seller under this paragraph (c) in an amount in excess of the Depositor's
resale profit on its sale of the Offered  Certificates or the underwriter's fee,
whichever is greater.

     (d) Promptly after receipt by an indemnified  party under this Section 4.14
of notice of the commencement of any action,  such indemnified  party will, if a
claim in respect thereof is to be made against the indemnifying party under this
Section  4.14,  notify the  indemnifying  party in  writing of the  commencement
thereof,  but the omission to so notify the indemnifying  party will not relieve
the indemnifying  party from any liability which the indemnifying party may have
to any indemnified party hereunder except to the extent such indemnifying  party
has been  prejudiced  thereby.  In case any such  action is brought  against any
indemnified  party, and it notifies the  indemnifying  party of the commencement
thereof,  the indemnifying party will be entitled to participate therein and, to
the extent  that it may elect by written  notice  delivered  to the  indemnified
party promptly after receiving the aforesaid notice from such indemnified party,
to assume the defense  thereof  with  counsel  reasonably  satisfactory  to such
indemnified  party. After notice from the indemnifying party to such indemnified
party of its election to assume the defense thereof, the indemnifying party will
not be liable to such indemnified party under this Section 4.14 for any legal or
other expenses  subsequently  incurred by such  indemnified  party in connection
with the defense thereof other than reasonable costs of investigation; provided,
however, if the defendants in any such action include both the indemnified party
and the  indemnifying  party and the  indemnified  party  shall have  reasonably
concluded  that there may be legal  defenses  available to it that are different
from or additional to those available to the indemnifying  party and would raise
a potential  conflict,  the indemnified party or parties shall have the right to
select  separate  counsel  to  assert  such  legal  defenses  and  to  otherwise
participate in the defense of such action on behalf of such indemnified party or
parties.  The  indemnifying  party shall not be liable for the  expenses of more
than one separate counsel.

     (e)  In  order  to  provide  for  just  and   equitable   contribution   in
circumstances  in which the  indemnity  agreement  provided for in the preceding
parts  of this  Section  4.14 is for any  reason  held to be  unavailable  to or
insufficient  to hold  harmless an  indemnified  party under  subsection  (a) or
subsection (b) of this Section 4.14 in respect of any losses, claims, damages or
liabilities  (or  actions  in  respect   thereof)   referred  to  therein,   the
indemnifying  party  shall  contribute  to the  amount  paid or  payable  by the
indemnified party as a result of such losses, claims, damages or liabilities (or
actions  in  respect  thereof);  provided,  however,  that no  person  guilty of
fraudulent  misrepresentation  (within  the  meaning  of  Section  11(f)  of the
Securities  Act) shall be entitled to  contribution  from any person who was not
guilty  of such  fraudulent  misrepresentation.  In  determining  the  amount of
contribution  to which the  respective  parties  are  entitled,  there  shall be
considered (i) the relative benefits received by the Seller on the one hand,




                                       11
<PAGE>

and the Depositor on the other, from the offering of the Certificates or (ii) if
the  allocation  provided by clause (i) is not permitted by applicable  law, the
relative benefits  described in clause (i) as well as the relative faults of the
Seller and the Depositor,  taking into account the Seller's and the  Depositor's
relative knowledge and access to information  concerning the matter with respect
to which the claim was  asserted,  the  opportunity  to correct  and prevent any
statement or omission, and any other equitable considerations appropriate in the
circumstances. The Seller and the Depositor agree that it would not be equitable
if the amount of such  contribution  were  determined  by pro rata or per capita
allocation.  For purposes of this Section 4.14,  each director of the Depositor,
each officer of the Depositor who signed the  Registration  Statement,  and each
person,  if any, who controls the Depositor  within the meaning of Section 15 of
the Securities Act, shall have the same rights to contribution as the Depositor,
and each  director of Seller,  and each person,  if any, who controls the Seller
within the  meaning of Section  15 of the  Securities  Act,  shall have the same
rights to contribution as the Seller.

     Section  4.15.  Miscellaneous.  (i) This  Agreement  supersedes  all  prior
agreements and understandings  relating to the subject matter hereof,  (ii) this
Agreement  may be amended  from time to time by the Seller and the  Depositor by
written  agreement,  without notice to or consent of the related Holders to cure
any ambiguity,  to correct or supplement any provisions  herein,  to comply with
any changes in the Code, or to make any other provisions with respect to matters
or questions  arising under this Agreement which shall not be inconsistent  with
the provisions of this Agreement; provided, however, that such action shall not,
as evidenced by an Officer's Certificate, at the expense of the party requesting
the change,  delivered to the Trustee,  adversely affect in any material respect
the interests of any Holder; and provided further,  that no such amendment shall
reduce in any manner the amount of, or delay the timing of, payments received on
Mortgage Loans which are required to be distributed on any  Certificate  without
the  consent  of the  Holder  of such  Certificate,  or  change  the  rights  or
obligations of any other party hereto  without the consent of such party,  (iii)
this  Agreement may be amended from time to time by the Seller and the Depositor
with the consent of the  Required  Certificateholders  for the purpose of adding
any provisions to or changing in any manner or eliminating any of the provisions
of this  Agreement  or of  modifying  in any manner  the rights of the  Holders;
provided,  however,  that no such  amendment  shall be made  unless the  Trustee
receives  an  Officer's  Certificate,  that such  change  will not reduce in any
manner the amount of, or delay the timing  of,  payments  received  on  Mortgage
Loans  which are  required  to be  distributed  on any  Certificate  without the
consent of the Holder of such  Certificate,  and (iv) it shall not be  necessary
for the consent of any Holder under this Section to approve the particular  form
of any proposed  amendment,  but it shall be  sufficient  if such consent  shall
approve the substance thereof.

                     [Signatures Commence on Following Page]



                                       12
<PAGE>



     IN WITNESS WHEREOF, the parties hereto have caused their names to be signed
by their  respective  officers  thereunto  duly  authorized as of the date first
above written.




                               CREDIT SUISSE FIRST BOSTON MORTGAGE
                                   SECURITIES CORP.



                               By:________________________________
                                  Name:
                                  Title:



                               [_____________________________]




                               By:________________________________
                                  Name:
                                  Title:




                                       13
<PAGE>


EXHIBIT A

                             LIST OF MORTGAGE LOANS

                             [See Schedule 1 to the

                              Loan Sale Agreement]













                                       14
<PAGE>



EXHIBIT B

                            OFFICER'S CERTIFICATE OF

                                   THE SELLER












                                       15
<PAGE>


EXHIBIT C

                              OPINION OF COUNSEL TO

                                   THE SELLER












                                       16
<PAGE>

                                TABLE OF CONTENTS

ARTICLE ONE

      DEFINITIONS....................................................... 1

      Section 1.01.  Definitions........................................ 1

ARTICLE TWO

      PURCHASE, SALE AND CONVEYANCE OF MORTGAGE LOANS................... 2

      Section 2.01.  Agreement to Purchase.............................. 2

      Section 2.02.  Purchase Price..................................... 3

      Section 2.03.  Conveyance  of Mortgage  Loans;  Possession of
                       Mortgage Files................................... 3

      Section 2.04.  Delivery of Mortgage Loan Documents................ 3

      Section 2.05.  Transfer  of  Mortgage  Loans;  Assignment  of
                       Agreement........................................ 4

      Section 2.06.  Books and Records.................................. 4

      Section 2.07.  Cost of Delivery of Documents...................... 4

ARTICLE THREE

      COVENANTS......................................................... 5

ARTICLE FOUR

      MISCELLANEOUS..................................................... 5

      Section 4.01.  Conditions of Depositor's Obligations.............. 5

      Section 4.02.  Conditions of Seller's Obligations................. 7

      Section 4.03.  Termination of Depositor's Obligations............. 7

      Section 4.04.  Notices............................................ 8

      Section 4.05.  Severability of Provisions......................... 8

      Section 4.06.  Agreement of Seller................................ 8

      Section 4.07.  Survival........................................... 8

      Section 4.08.  Effect of Headings and Table of Contents........... 8





                                       17
<PAGE>

      Section 4.09.  Successors and Assigns............................. 8

      Section 4.10.  Governing Law...................................... 9

      Section 4.11.  Confirmation of Intent............................. 9

      Section 4.12.  Execution in Counterparts.......................... 9

      Section 4.13.  Costs.............................................. 9

      Section 4.14.  Indemnification....................................10

      Section 4.15.  Miscellaneous......................................13



Exhibits
- - - - - - - - --------

Exhibit A -     List of Mortgage Loans

Exhibit B -     Officer's Certificate of the Seller

Exhibit C -     Opinion of Counsel to the Seller






                                                                     Exhibit 4.3



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







              CREDIT SUISSE FIRST BOSTON MORTGAGE SECURITIES CORP.,

                                    Depositor

                                       and

                         ------------------------------,

                                     Trustee




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

                             FORM OF TRUST AGREEMENT
                         Dated as of ____________, 200_

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


                               Trust Certificates

                                 Series 200_-__







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



<PAGE>



     TRUST AGREEMENT,  dated as of __________,  200_, by and among Credit Suisse
First Boston  Mortgage  Securities  Corp.,  as depositor (the  "Depositor")  and
_______________________,  a  ___________  banking  corporation,  as trustee (the
"Trustee").

                              PRELIMINARY STATEMENT

     The Depositor is the owner of the Underlying Certificates being conveyed by
it to the Trustee for  inclusion in the Trust Fund and has duly  authorized  the
execution and delivery of this  Agreement to provide for the sale and conveyance
to the  Trustee  of the  Underlying  Certificates  and  the  issuance  of  Trust
Certificates,  Series  200_-__  (the  "Certificates"  or "Trust  Certificates"),
representing in the aggregate the entire beneficial  ownership of the Underlying
Certificates   and  other  assets  included  in  the  Trust  Fund,  which  Trust
Certificates  are  issuable as provided in this  Agreement.  All  covenants  and
agreements  made by the Depositor and the Trustee  herein are for the benefit of
the Holders of the Certificates.  The Depositor is entering into this Agreement,
and the Trustee is accepting  the trust  created  hereby,  for good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged.

     All things necessary to make this Agreement a valid declaration of trust by
the Depositor in accordance with its terms have been done.

     In  consideration  of  the  premises  and  the  mutual   agreements  herein
contained, the Depositor and the Trustee agree as follows:

                                   ARTICLE I

                                   DEFINITIONS

     Section 1.01. Defined Terms.

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

     Accrued Certificate Interest:  With respect to each Payment Date, as to any
Regular  Certificate,  one month's interest accrued at the Pass-Through  Rate on
the Certificate Principal Balance thereof immediately prior to such Payment Date
minus the amount of principal on the Underlying Certificates,  if any, which was
not  previously   distributed  in  accordance  with  Section  3.02(a).   Accrued
Certificate  Interest  will  be  calculated  on  the  basis  of a  360-day  year
consisting of twelve 30-day months.

     Affiliate:  An  "affiliate"  of, or person  "affiliated"  with,  a specific
person,  is  a  person  that  directly,   or  indirectly  through  one  or  more
intermediaries,  controls or is controlled  by, or is under common control with,
the person specified.

     Aggregate  Series  Balance:  For any class of  certificates is equal to the
aggregate  outstanding  principal balances of all classes of certificates of the
series of which such class is a part.


<PAGE>


           Aggregate  Underlying   Certificate  Balance:  With  respect  to  any
Underlying Certificate, as of any Distribution Date (following all distributions
to be made with  respect  to the  Underlying  Certificate  on such  Distribution
Date), and as of any date of determination  thereafter until the next succeeding
Distribution Date, the aggregate  outstanding  principal balance of the class of
Underlying  Certificates to which such Underlying  Certificate  relates,  as set
forth  in  the   Distribution   Date  Statement  sent  to  the  Trustee  as  the
Certificateholder  of part or all of the  class of  certificates  to which  such
Underlying Certificate relates,  relating to such Distribution Date, which is to
be determined in accordance with the terms of the related Underlying Agreement.

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

     Anticipated  Termination  Date:  Any  Payment  Date on  which  the  Trustee
anticipates that the Trust Fund will be terminated pursuant to Section 6.01.

     Available Funds: As of any date of  determination,  the aggregate amount on
deposit in the Trust Certificate  Account as of such date of determination,  net
of any portion thereof which represents amounts payable pursuant to clauses (i),
(iii) and (iv) of Section 3.04.

     Book-Entry  Certificate:  Any  Certificate  registered  in the  name of the
Depository or its nominee.

     Business Day: Any day other than (i) a Saturday or a Sunday,  or (ii) a day
on which  banking  institutions  in the State of  [_______] or the State of [New
York] and such other state or states in which the Trust  Certificate  Account or
any account relating to the Underlying Certificates,  are required or authorized
by law or executive order to be closed.

     Certificate  or  Trust  Certificate:  Any  Offered  Certificate  or Class R
Certificate.

     Certificate Owner: With respect to a Book-Entry Certificate, the Person who
is the  beneficial  owner of such  Certificate,  as reflected on the books of an
indirect participating brokerage firm for which a Depository Participant acts as
agent, if any, and otherwise on the books of a Depository  Participant,  if any,
and otherwise on the books of the Depository.

     Certificate  Principal Balance: With respect to the Certificates other than
the Class R Certificate,  on any date of  determination,  an amount equal to (i)
the Initial  Certificate  Principal  Balance of such Certificate as specified on
the face thereof, minus (ii) the aggregate of all amounts previously distributed
with respect to such Certificate and applied to reduce the Certificate Principal
Balance  thereof  pursuant  to  Section  3.05;  provided  that  the  Certificate
Principal  Balance  of each  Certificate  of the Class of  Regular  Certificates
outstanding  with the  lowest  payment  priority  shall be  subject  to  further
reduction  as set  forth in  Section  3.05(b).  The Class R  Certificate  has no
Certificate Principal Balance.

     Certificate  Registrar and Certificate  Register:  The meanings provided in
Section 4.02.

     Certificateholder  or Holder:  The person in whose name a Trust Certificate
is registered in the Certificate  Register,  except that, solely for the purpose
of giving any consent or



                                       2
<PAGE>

exercising any Voting Rights pursuant to this Agreement,  any Trust  Certificate
registered in the name of the Depositor or any Affiliate  shall be deemed not to
be an Outstanding  Certificate or taken into account when calculating the Voting
Rights of any Certificateholder.

     All references herein to "Holder" or "Certificateholder"  shall reflect the
rights of Certificate Owners as they may indirectly exercise such rights through
the Depository and participating members thereof,  except as otherwise specified
herein; provided,  however, that the Trustee shall be required to recognize as a
"Holder" or  "Certificateholder"  only the Person in whose name a Certificate is
registered in the Certificate Register.

     Class:  Collectively,  all of  the  Trust  Certificates  bearing  the  same
designation.

     Class A Certificate: Any of the Class A Certificates executed and delivered
by the Trustee  substantially in the form annexed hereto as Exhibit A evidencing
an interest [designated as a "regular interest"] in the Trust Fund [for purposes
of the REMIC Provisions].

     Class B  Certificate:  Any one of the  Class B  Certificates  executed  and
delivered by the Trustee  substantially in the form annexed hereto as Exhibit C,
evidencing an interest  [designated  as a "regular  interest"] in the Trust Fund
[for purposes of the REMIC Provisions].

     Class M Certificate: Any one of the Class M1, Class M2 and Class M3
Certificates  executed and delivered  hereunder by the Trustee  substantially in
the form annexed  hereto as Exhibit B,  evidencing an interest  [designated as a
"regular interest"] in the Trust Fund [for purposes of the REMIC Provisions].

     Class  R  Certificate:  Any  Class R  Certificate  executed  and  delivered
hereunder by the Trustee  substantially in the form annexed hereto as Exhibit D,
evidencing an interest  [designated  as a "regular  interest"] in the Trust Fund
[for purposes of the REMIC Provisions].

     Closing Date: _________, 200_.

     Code: The Internal Revenue Code of 1986.

     Corporate Trust Office: The principal corporate trust office of the Trustee
in the State of ___________ 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
________________________________.

     Cut-off Date: ________, 200_.

     Definitive Certificate: Any definitive, fully registered Certificate.

     Depositor:  Credit  Suisse First Boston  Mortgage  Securities  Corp. or its
successor in interest.

     Depository:  The  Depository  Trust  Company,  or any successor  Depository
hereafter  named.  The  nominee  of  the  initial  Depository  for  purposes  of
registering those Certificates that are to be Book-Entry  Certificates is Cede &
Co. The Depository shall at all



                                       3
<PAGE>


times be a  "clearing  corporation"  as defined in  Section  8-102(a)(5)  of the
Uniform  Commercial  Code of the  State  of New  York  and a  "clearing  agency"
registered  pursuant to the provisions of Section 17A of the Securities Exchange
Act of 1934, as amended.

     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.

     Distribution   Date:   With   respect   to  any   Underlying   Certificate,
"Distribution  Date" shall mean the date  specified  in the  related  Underlying
Agreement on which distributions on the Underlying Certificates are to be made.

     Distribution Date Statement: With respect to any Underlying Certificate and
any  Distribution  Date, the monthly  remittance  report forwarded to the holder
thereof  with  respect  to  such  Distribution  Date  pursuant  to  the  related
Underlying Agreement.

     Eligible Account:  An account that is any of the following:  (i) maintained
with a depository  institution the debt  obligations of which have been rated by
the Rating Agency in its highest  rating  category,  (ii) an account or accounts
the deposits in which such accounts are fully insured to the limits  established
by the FDIC, provided that any such deposits not so insured shall, to the extent
acceptable  to  the  Rating  Agency,  as  evidenced  in  writing,  be  otherwise
maintained  such that (as  evidenced  by an Opinion of Counsel  delivered to the
Trustee and the Rating Agency) the  registered  Holders of  Certificates  have a
claim with  respect to the funds in such account or a perfected  first  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 with which such account is
maintained,  (iii) an account or accounts of a depository institution acceptable
to the Rating  Agency (as  evidenced in writing by the Rating Agency that use of
any such  account  as the Trust  Certificate  Account  will not have an  adverse
effect on the  then-current  ratings assigned to the Classes of the Certificates
then  rated  by  such  Rating  Agency),  or  (iv) 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.

     FDIC: The Federal Deposit Insurance Corporation or any successor.

     FHLMC: The Federal Home Loan Mortgage Corporation or any successor.

     FNMA: The Federal National Mortgage Association or any successor.

     Independent:  When used with respect to any specified Person, such a Person
who (i) is in fact  independent of the Depositor,  (ii) does not have any direct
financial  interest  in the  Depositor  or in an  Affiliate,  and  (iii)  is not
connected  with the Depositor as an officer,  employee,  promoter,  underwriter,
trustee, partner, director or person performing similar functions.

     Initial Certificate  Principal Balance:  With respect to any Class of Trust
Certificates, the initial Certificate Principal Balance thereof, as follows:




                                       4
<PAGE>

     Class A Certificates $_________________

     [Class M1 Certificates $_________________

     Class M2 Certificates $_________________

     Class M3 Certificates $_________________

     Class B Certificates $_________________

     Class R Certificates $0]

     Mortgage Loans: With respect to any Underlying  Certificate and any Related
Certificates,  the  mortgage  loans in which  such  Underlying  Certificate  and
Related Certificates evidence a beneficial ownership interest.

     Non-United States Person: Any Person other than a United States Person.

     Notice of Final Distribution:  With respect to any Underlying  Certificate,
the notice to be provided  pursuant to the related  Underlying  Agreement to the
effect that final distribution on such Underlying Certificate shall be made only
upon presentation and surrender thereof.

     Notice of Termination:  Any of the notices given by the Trustee pursuant to
Section 6.01(b).

     Offered Certificate:  Any of the [Class A, Class M1, Class M2, Class M3 and
Class B] Certificates.

     Officer's  Certificate:  A certificate signed by the Chairman of the Board,
the  President  or a Vice  President  or  Assistant  Vice  President  and by the
Treasurer,  the  Secretary  or one  of the  Assistant  Treasurers  or  Assistant
Secretaries of the Depositor or the Trustee, as required by this Agreement.

     Opinion of Counsel: A written opinion of counsel (not at the expense of the
Trustee),  who may be counsel  for the  Depositor;  except  that any  opinion of
counsel  relating  to (i)  the  qualification  of  any  account  required  to be
maintained  pursuant  to this  Agreement  as an  Eligible  Account  or (ii)  the
qualification  of the  Trust  Fund as a  REMIC  or  compliance  with  the  REMIC
Provisions, must be an opinion of Independent counsel.

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

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




                                       5
<PAGE>

     (ii) Trust  Certificates  in  exchange  for which or in lieu of which other
Trust  Certificates have been executed and delivered  pursuant to this Agreement
unless  proof  satisfactory  to the  Trustee  is  presented  that any such Trust
Certificates are held by a holder in due course.

     Ownership  Interest:  As to any  Certificate,  any  ownership  or  security
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, as owner or as pledgee.

     Pass-Through  Rate:  With  respect  to any  Class of  Certificates  and any
Payment Date, means the [___________________].

     Payment  Date:  The date which is the later of (a) the second  Business Day
following  the  latest  of the  related  Distribution  Dates  on the  Underlying
Certificates,  and (b) the date on which both the  distribution  with respect to
each  Underlying  Certificate and the related  Distribution  Date Statements and
Underlying  Re-REMIC  Distribution  Date  Statements,  as applicable,  have been
received by the Trustee, but no later than five Business Days following the date
set forth in clause (a); PROVIDED,  HOWEVER,  that the initial Payment Date will
be _________, 200_.

     Percentage  Interest:  With  respect  to a  Class  A,  Class  M or  Class B
Certificate,  the undivided  percentage  ownership interest in the related Class
evidenced by such  Certificate,  which  percentage  ownership  interest shall be
equal to the  initial  Certificate  Principal  Balance  thereof  divided  by the
aggregate  initial  Certificate  Principal Balance of all of the Certificates of
the same Class. With respect to a Class R Certificate,  the undivided percentage
ownership interest in such Class, as stated on the face of such Certificate.

     Permitted Investments: One or more of the following:

     (i)  obligations  of, or  guaranteed  as to principal  and interest by, the
United States or any agency or instrumentality thereof when such obligations are
backed by the full faith and credit of the United States;

     (ii) repurchase  agreements on obligations specified in clause (i) maturing
not more than one month from the date of acquisition thereof,  provided that the
unsecured  obligations of the party agreeing to repurchase such  obligations are
at the  time  rated  by the  Rating  Agency  in its  highest  short-term  rating
available;

     (iii)  federal  funds,  certificates  of  deposit,  demand  deposits,  time
deposits and bankers' acceptances (which shall each have an original maturity of
not more  than 90 days and,  in the case of  bankers'  acceptances,  shall in no
event have an original maturity of more than 365 days or a remaining maturity of
more  than  30  days)  of any  U.S.  depository  institution  or  trust  company
incorporated  under the laws of the United States or any state thereof or of any
domestic branch of a foreign depository  institution or trust company;  provided
that the debt obligations of such depository institution or trust company at the
date of acquisition  thereof have been rated by the Rating Agency in its highest
short-term rating available;




                                       6
<PAGE>

     (iv)  commercial  paper  (having  original  maturities of not more than 365
days) of any corporation incorporated under the laws of the United States or any
state  thereof  which on the date of  acquisition  has been  rated by the Rating
Agency in its highest short-term rating available; provided that such commercial
paper shall have a remaining maturity of not more than 30 days;

     (v) a money  market fund or qualified  investment  fund rated by the Rating
Agency in its highest rating available; and

     (vi) other  obligations  or  securities  that are  acceptable to the Rating
Agency as a Permitted Investment hereunder and will not result in a reduction in
the then-current  rating of the Classes of Certificates that have been rated, as
evidenced in writing;

provided,  however,  (A) such  obligation  or  security  is held for a temporary
period pursuant to Treasury  Regulations Section  1.860G-2(g)(1) and (B) that no
instrument  shall be a Permitted  Investment  if it  represents,  either (1) the
right to receive only  interest  payments  with respect to the  underlying  debt
instrument  or (2) the right to receive both  principal  and  interest  payments
derived from obligations  underlying such instrument and the principal  payments
with respect to such instrument  provide a yield to maturity greater than [120%]
of the  yield to  maturity  at par of such  underlying  obligations.  References
herein to the highest  rating  available on unsecured  long-term debt shall mean
[____]  or  higher in the case of  [_____]  and in the case of any other  Rating
Agency shall mean such ratings without any plus or minus, and references  herein
to the highest  rating  available on unsecured  commercial  paper and short-term
debt obligations shall mean [____] by [_____] in the case of [_____].

     Permitted  Transferee:  Any Transferee of a Class R Certificate  other than
(i) the United  States,  any state or any  political  subdivision  thereof,  any
possession of the United States, or any agency or  instrumentality of any of the
foregoing  (other than an  instrumentality  which is a corporation if all of its
activities  are subject to tax and,  except for the Federal  Home Loan  Mortgage
Corporation,  a majority of its board of  directors  is not selected by any such
governmental unit), (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  (unless  such
organization  is  subject  to the tax  imposed  by  Section  511 of the  Code on
unrelated   business  taxable   income),   (iv)  rural  electric  and  telephone
cooperatives  described  in Section  1381 of the Code and (v) an electing  large
partnership  under Section 775 of the Code and any other Person so designated by
the Trustee  based upon an Opinion of Counsel  that the holding of an  Ownership
Interest in a Class R Certificate by such Person may cause the Trust Fund or any
Person  having an Ownership  Interest in any Class of  Certificates,  other than
such Person,  to incur a liability for any tax imposed under the Code that would
not  otherwise  be imposed but for the  Transfer of an  Ownership  Interest in a
Class R  Certificate  to such Person.  The terms  "United  States",  "State" and
"international  organization"  shall have the meanings set forth in Section 7701
of the Code or successor provisions.

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



                                       7
<PAGE>

     Prepayment Assumption: The percentage of the standard prepayment assumption
set forth  below  with  respect  to the  Mortgage  Loans  related to each of the
Underlying  Certificates.  The standard prepayment assumption assumes a constant
rate of prepayment of mortgage loans of [__]% per annum of the then  outstanding
principal  balance of such mortgage  loans in the first month of the life of the
mortgage loans,  increasing by an additional  [__]% per annum in each succeeding
month  until the  thirtieth  month,  and a  constant  [__]%  per  annum  rate of
prepayment thereafter for the life of the mortgage loans.

                     ________ Series ____-__ Class __ ____%
                     ________ Series ____-__ Class __ ____%
                     ________ Series ____-__ Class __ ____%

     Principal  Distribution  Amount:  With  respect to any Payment Date and any
Class of Certificates means the product of the applicable Principal Distribution
Percentage for such Class of Trust Certificates times the Underlying Certificate
Principal Distribution Amount for such Payment Date.

     Principal  Payment:  With  respect  to any  Payment  Date and any  Class of
Certificates  means the payment received,  if any, with respect to its Principal
Distribution Amount.

     Rating Agency:  [_____] and [_____].  If either agency or a successor is no
longer in existence,  "Rating  Agency" shall be such  statistical  credit rating
agency, or other comparable Person, designated by the Depositor, notice of which
designation shall be given to the Trustee.

     Realized Losses: With respect to any Underlying Certificate,  the amount of
a "Realized Loss," or, with respect to the Underlying  [Re-REMIC]  Certificates,
the aggregate of the "Pooled  Certificate  Excess  Bankruptcy  Losses",  "Pooled
Certificate  Excess Fraud Losses" and "Pooled  Certificate Excess Special Hazard
Losses",  in each  case as such  terms are  defined  in the  related  Underlying
Agreement,  which is applied to reduce the principal  balance of such Underlying
Certificate.

     Record Date: With respect to any Payment Date, other than the first Payment
Date,  the last  Business  Day of the  month  preceding  the  month in which the
earliest related  Distribution Date on the Underlying  Certificates  occurs, and
with respect to the first Payment Date, the Closing Date.

     Regular Certificates: [The Class A, Class B and Class M Certificates.]

     Related  Certificates:  With respect to the  Underlying  Certificates,  any
other  mortgage  pass-through   certificates  issued  pursuant  to  the  related
Underlying Agreement.

     Related Senior Certificates:  With respect to the Underlying  Certificates,
any class of certificates of the related series with a higher payment priority.

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



                                       8
<PAGE>


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

           Responsible  Officer:  When used with  respect  to the  Trustee,  any
officer of the  [_____________  Division]  of the  Trustee,  including  any Vice
President,  any Assistant Vice President,  any Assistant Secretary, or any other
     officer of the Trustee customarily performing functions similar to those
performed  by any of the above  designated  officers to whom,  with respect to a
particular matter, such matter is referred.

     Rule 144A:  Rule 144A under the  Securities  Act of 1933, as in effect from
time to time.

     Single  Certificate:  A  Certificate  of any Class  evidencing  a  [$1,000]
denomination for Certificates of such class as set forth in Section 3.06.

     Startup Day: The day designated as such pursuant to Section 2.03(b).

     Tax Returns: The federal income tax return on Internal Revenue Service Form
1066, U.S. Real Estate Mortgage Investment Conduit Income Tax Return,  including
Schedule Q  thereto,  Quarterly  Notice to  Residual  Interest  Holders of REMIC
Taxable Income or Net Loss  Allocation,  or any successor  forms, to be filed on
behalf of the Trust Fund due to its  classification  as a REMIC  under the REMIC
Provisions, together with any and all other information, reports or returns that
may be  required to be  furnished  to the  Certificateholders  or filed with the
Internal  Revenue Service or any other  governmental  taxing authority under any
applicable provisions of federal, state or local tax laws.

     Termination  Date:  The Payment Date on which the Trust Fund is  terminated
pursuant to Section 6.01.

     Transfer: Any direct or indirect transfer,  sale, pledge,  hypothecation or
other form of assignment of any Ownership Interest in a Certificate.

     Transferee:  Any Person who is acquiring by Transfer any Ownership Interest
in a Certificate.

     Transferor:  Any Person  who is  disposing  by  Transfer  of any  Ownership
Interest in a Certificate.

     Trust Certificate  Account:  The trust account or accounts,  which shall at
all times be Eligible  Accounts,  created and maintained by the Trustee pursuant
to Section 3.03. Funds deposited in the Trust Certificate  Account shall be held
in trust  for the  Certificateholders  for the uses and  purposes  set  forth in
Article III hereof.

     Trustee:  __________________,  a _____________  banking  corporation or its
successor in interest, or any successor trustee appointed as herein provided.



                                       9
<PAGE>

     Trustee Fee: With respect to any Payment Date,  the fee payable  monthly to
the Trustee in respect of its  compensation  hereunder that accrues at an annual
rate  equal to [___]% on the  aggregate  Certificate  Principal  Balance  of the
Certificates of all Classes as in effect immediately prior to the next preceding
Distribution Date.

     Trustee Fee  Agreement:  The fee  agreement  between the  Depositor and the
Trustee  relating  to  certain  fees and  expenses  payable  to the  Trustee  in
connection with this Agreement.

     Trust Fund: The corpus of the trust created by and to be administered under
this Agreement consisting of: (i) the Underlying  Certificates  described in the
Underlying  Certificate  Schedule,  (ii) all distributions thereon after but not
including the  Distribution  Date  occurring in _________,  200_,  and (iii) the
Trust  Certificate  Account and such assets that are deposited therein from time
to time,  together  with any and all income,  proceeds and payments with respect
thereto.

     Underlying  Agreement:  With respect to each  Underlying  Certificate,  the
pooling and servicing agreement,  trust agreement or indenture pursuant to which
such Underlying Certificate was issued, as described in Exhibit E.

     Underlying Certificate:  Any one of the mortgage pass-through  certificates
transferred  to the Trustee by the  Depositor  pursuant to Section 2.01, as from
time to  time  are  held  as a part of the  Trust  Fund  and as are  more  fully
described in the Underlying Certificate Schedule attached hereto as Exhibit E.

     Underlying Certificate  Distribution Date: With respect to any Payment Date
and Underlying Certificate,  the Distribution Date occurring next preceding such
Payment Date.

     Underlying  Certificateholder:   The  registered  owner  of  an  Underlying
Certificate.

     Underlying Certificate Rate: With respect to any Underlying Certificate and
any Distribution Date, the rate per annum at which interest payable with respect
to such Underlying Certificate on such Distribution Date accrued.

     Underlying  Certificate Schedule: The schedule attached as Exhibit E hereto
identifying the Underlying Certificates.

     [Underlying  Re-REMIC  Certificates:   The   ______________________   Trust
_________,  Series ______ Class __, and  ___________________  Trust  __________,
Series ______ Class __, as listed in Exhibit E hereto.]

     United  States  Person:  A citizen  or  resident  of the United  States,  a
corporation,  partnership  or other entity created or organized in, or under the
laws of, the United States or any political subdivision thereof, or an estate or
trust whose income from sources without the United States is includable in gross
income  for  United  States  federal  income  tax  purposes  regardless  of  its
connection with the conduct of a trade or business within the United States.



                                       10
<PAGE>

     Voting Rights:  The portion of the voting rights of all of the Certificates
which is allocated  to any  Certificate.  For so long as the related  Classes of
Certificates  remain  outstanding,  [99]% of all of the Voting  Rights  shall be
allocated  among  Holders of the  Regular  Certificates,  in  proportion  to the
outstanding  Certificate  Principal  Balances  of their  respective  Outstanding
Certificates and the aggregate outstanding  Certificate Principal Balance of the
Regular Certificates which are Outstanding  Certificates;  and the Holder of the
Class R  Certificate  shall be  entitled  to [1]% of all of the  Voting  Rights,
allocated  among  the  Certificates  of such  Class  in  accordance  with  their
respective Percentage Interests.

                                   ARTICLE II

                   CONVEYANCE OF THE UNDERLYING CERTIFICATES;
                     ORIGINAL ISSUANCE OF TRUST CERTIFICATES

     Section 2.01. Conveyance of the Underlying Certificates.

     (a) The  Depositor,  concurrently  with the execution and delivery  hereof,
does  hereby  sell,  transfer,  assign,  set-over  and  otherwise  convey to the
Trustee,  in trust, for the use and benefit of the  Certificateholders,  without
recourse,  all the right,  title and  interest  of the  Depositor  in and to the
Underlying  Certificates and all other assets  constituting the Trust Fund. Such
assignment includes,  without limitation,  all amounts payable to and all rights
of  the  Underlying   Certificateholders  pursuant  to  the  related  Underlying
Agreement.

     In connection  with such transfer and  assignment,  on the Closing Date the
Depositor  will deliver to, and deposit with, the Trustee each of the Underlying
Certificates, together with the following documents or instruments:

          (i) a duly issued and  authenticated  certificate or certificates  for
     each class of the Underlying  Certificates,  evidencing the entire interest
     in such  class,  with  appropriate  endorsements  and  other  documentation
     sufficient  under the related  Underlying  Agreement to transfer  each such
     certificate to "______________, as trustee under the Trust Agreement, dated
     as of  _________,  200_,  relating to Credit  Suisse First Boston  Mortgage
     Securities Corp., Trust Certificates, Series 200_-__";

          (ii) a copy of each related Underlying Agreement; and

          (iii) copies of each of the most recent  Distribution  Date Statements
     and [Underlying  Re-REMIC  Distribution  Date] Statements  delivered to the
     Underlying Certificateholders.

     In addition,  subsequent to the Closing Date,  the Depositor  shall deliver
to,  and  deposit  with,  the  Trustee  all  distributions,   Distribution  Date
Statements, and Underlying Re-REMIC Distribution Date Statements, if applicable,
relating to distributions  on the Underlying  Certificates due after the Cut-off
Date and received by the Depositor. Any such distributions shall be made by wire
on the same day on which such distributions are received by the Depositor or, if
such  distribution is received by the Depositor after noon New York time, on the
next Business Day.




                                       11
<PAGE>

     The  Trustee  hereby  acknowledges  the  receipt  by it of  the  Underlying
Certificates  and the other  documents and  instruments  referenced  above,  and
declares that it holds and will hold such  Underlying  Certificates,  such other
documents and  instruments  and that it holds and will hold all other assets and
documents included in the Trust Fund, in trust for the exclusive use and benefit
of all present and future Certificateholders.

     The  transfer  of  the  Underlying   Certificates   and  all  other  assets
constituting the Trust Fund is absolute and is intended by the parties hereto as
a sale.  Except as provided  in Sections  2.02,  3.02(b)  and 6.01  hereof,  the
Trustee  shall not  assign,  sell,  dispose of or transfer  any  interest in the
Underlying Certificates or any other asset constituting the Trust Fund or permit
the Underlying Certificates or any other asset constituting the Trust Fund to be
subjected to any lien,  claim or  encumbrance  arising by,  through or under the
Trustee or any person claiming by, through or under the Trustee.

     (b) It is the express  intent of the parties  hereto that the conveyance of
the Trust Fund to the Trustee, for the benefit of the Certificateholders, by the
Depositor as provided in this Section 2.01 be, and be construed  as, an absolute
sale of the Trust Fund.  It is,  further,  not the intention of the parties that
such  conveyance  be deemed a pledge of the Trust Fund by the  Depositor  to the
Trustee to secure a debt or other obligation of the Depositor.  However,  in the
event that, notwithstanding the intent of the parties, the Trust Fund is held to
be the property of the  Depositor,  or if for any other reason this Agreement is
held or deemed to create a security interest in the Trust Fund, then:

          (i) this Agreement shall be deemed to be a security agreement; and

          (ii) the conveyance provided for in Section 2.01 shall be deemed to be
     a  grant  by  the  Depositor  to  the  Trustee,  for  the  benefit  of  the
     Certificateholders, of a security interest in all of the Depositor's right,
     title, and interest, whether now owned or hereafter acquired, in and to:

               (i)  All accounts, contract rights, general intangibles,  chattel
                    paper,  instruments,  documents,  money,  deposit  accounts,
                    certificates of deposit,  goods, letters of credit,  advices
                    of  credit  and  uncertificated  securities  consisting  of,
                    arising from or relating to any of the property described in
                    clauses (1) and (2) below: (1) the Underlying  Certificates;
                    and  (2)  the  Trust  Certificate  Account,   including  all
                    property therein and all income from the investment of funds
                    therein   (including  any  accrued   discount   realized  on
                    liquidation of any investment purchased at a discount);

               (ii) All accounts, contract rights, general intangibles,  chattel
                    paper,  instruments,  documents,  money,  deposit  accounts,
                    certificates of deposit,  goods, letters of credit,  advices
                    of  credit,  uncertificated  securities,  and  other  rights
                    arising  from  or  by  virtue  of  the  disposition  of,  or
                    collections  with respect to, or insurance  proceeds payable
                    with  respect  to,  or claims  against  other  Persons  with
                    respect to, all or any part of the  collateral  described in
                    clause (A) above (including any accrued discount realized on
                    liquidation of any investment purchased at a discount); and



                                       12
<PAGE>

               (iii)All cash and non-cash  proceeds of the collateral  described
                    in clauses (A) and (B) above.

     (c) The possession by the Trustee of the Underlying  Certificates  and such
other  goods,  letters  of  credit,  advices  of  credit,  instruments,   money,
documents,  chattel  paper or  certificated  securities  shall be  deemed  to be
possession  by the secured  party,  or  possession  by a  purchaser  or a person
designated  by him or her, for  purposes of  perfecting  the  security  interest
pursuant to the Uniform Commercial Code (including, without limitation, Sections
9-305, 8-313 or 8-321 thereof) as in force in the relevant jurisdiction.

     (d)  Notifications to Persons holding such property,  and  acknowledgments,
receipts or confirmations from Persons holding such property, shall be deemed to
be  notifications  to,  or  acknowledgments,  receipts  or  confirmations  from,
financial  intermediaries,  bailees or agents (as applicable) of the Trustee for
the purpose of perfecting such security interest under applicable law.

     (e) The Depositor and, at the Depositor's direction, the Trustee, shall, to
the extent consistent with this Agreement,  take such reasonable  actions as may
be necessary to ensure that, if this  Agreement were deemed to create a security
interest in the Trust Fund or the other property  described above, such security
interest would be deemed to be a perfected  security  interest of first priority
under  applicable law and will be maintained as such  throughout the term of the
Agreement.  The  Depositor  shall file all  filings  necessary  to perfect  such
security  interest of first priority and shall maintain the effectiveness of any
original filings necessary under the Uniform Commercial Code as in effect in any
jurisdiction to perfect the Trustee's  security interest in or lien on the Trust
Fund and such other  property,  including  without  limitation (i)  continuation
statements,  and (ii) such other statements as may be occasioned by any transfer
of any interest of the  Depositor in the Trust Fund or such other  property.  In
connection herewith,  the Trustee shall have all of the rights and remedies of a
secured party and creditor under the Uniform  Commercial Code as in force in the
relevant jurisdiction.

     Section 2.02. Issuance of Trust Certificates.

     The Trustee acknowledges the transfer, delivery and assignment to it of the
Underlying Certificates,  together with the assignment to it of all other assets
included  in the  Trust  Fund,  and  declares  that it holds  and will  hold the
Underlying Certificates and all other assets included in the Trust Fund in trust
for the benefit of all present and future Certificateholders.  Concurrently with
such transfer and delivery,  the Trustee has duly  executed,  authenticated  and
delivered,  to or upon the order of the  Depositor,  the Trust  Certificates  in
authorized  denominations,  and  registered  in such names as the  Depositor has
requested.

     Section 2.03. [Miscellaneous REMIC Provisions.

     (a) The Depositor hereby designates the Certificates  (other than the Class
R  Certificate)  as the "regular  interests"  and the Class R Certificate as the
sole class of  "residual  interest"  in the Trust Fund for  purposes of Sections
860G(a)(1)  and  860G(a)(2)  of the Code,  respectively.  The Trustee  shall not
permit the creation of any "interests" (within the meaning of



                                       13
<PAGE>


Section 860G of the Code) in the REMIC, other than the regular interests and the
interests represented by the Class R Certificates, respectively.

     (b) The Closing Date will be the "Startup Day" of the Trust Fund within the
meaning of Section 860G(a)(9) of the Code.

     (c) The Class R Certificateholder  is hereby designated as the "tax matters
person" with  respect to the Trust Fund in the manner  provided  under  Treasury
Regulations  Section  1.860F-4(d)  and Temporary  Treasury  Regulations  Section
301.6231(a)(7)-1T. The Trustee shall serve as attorney-in-fact and agent for any
Person  that is the tax matters  person of the REMIC.  The Holder of the Class R
Certificate, by purchasing or accepting such Certificate, (A) shall be deemed to
consent to the appointment of the Trustee as attorney-in-fact  and agent for any
Person that is the tax matters person of the REMIC and (B) agrees to execute any
documents required to give effect to (A) above.

     (d) Solely for the purposes of Section  1.860G-1(a)(4)(iii) of the Treasury
Regulations,  the  "latest  possible  maturity  date" by which  the  Certificate
Principal Balance of each Class of Certificates  representing a regular interest
in  the  REMIC  would  be  reduced  to  zero  is  ________  20__,  which  is the
Distribution  Date immediately  following the latest  scheduled  maturity of any
Mortgage Loan.]

                                  ARTICLE III

                 ADMINISTRATION OF THE UNDERLYING CERTIFICATES;

                   PAYMENTS AND REPORTS TO CERTIFICATEHOLDERS

     Section  3.01.   Administration  of  the  Trust  Fund  and  the  Underlying
Certificates.

     (a) [The  parties  intend  that  the  Trust  Fund  formed  hereunder  shall
constitute,  and that the affairs of the Trust Fund shall be  conducted so as to
qualify the Trust Fund as a "real estate mortgage investment conduit" as defined
in and  in  accordance  with  the  REMIC  Provisions.  In  furtherance  of  such
intention,  the Trustee covenants and agrees that it shall act as agent (and the
Trustee  is hereby  appointed  to act as agent) on behalf of the Trust  Fund and
that in such  capacity it shall:  (i) prepare and file,  or cause to be prepared
and filed,  in a timely  manner,  annual U.S.  Real Estate  Mortgage  Investment
Conduit Income Tax Returns (Form 1066) and any other Tax Returns  required to be
filed by the Trust Fund, using a calendar year as the taxable year for the Trust
Fund or as otherwise may be required by the REMIC Provisions;  (ii) in the first
such tax return, make an election, on behalf of the Trust Fund, to be treated as
a REMIC,  such  election  to be made on Form  1066 or other  appropriate  tax or
information return (including Form 8811) or any appropriate state return for the
taxable  year  ending  on the  last  day of  the  calendar  year  in  which  the
Certificates are issued;  (iii) prepare and forward, or cause to be prepared and
delivered to the Trustee for  forwarding  and the Trustee  shall  forward to the
Certificateholders  all information  reports as and when required to be provided
to them in accordance with the REMIC Provisions or other federal income tax laws
and regulations (for purposes of federal income tax information reporting to the
Internal Revenue Service and to  Certificateholders,  the Prepayment  Assumption
shall be used as required); (iv) conduct the



                                       14
<PAGE>


affairs of the Trust Fund at all times that any  Certificates are outstanding so
as to  maintain  the  status  of the  Trust  Fund as a  REMIC  under  the  REMIC
Provisions;  (v) not  knowingly  or  intentionally  take any action  (including,
without  limitation,  permitting any modification with respect to any Underlying
Certificate),  or omit to take any action,  that would cause the  termination of
the REMIC status of the Trust Fund;  (vi) execute any such returns or reports to
be filed on behalf of the Trust Fund; (vii) in a timely manner pay the amount of
any and all  federal,  state and local  taxes  imposed  on the Trust Fund or its
assets  or  transactions   including,   without   limitation,   (A)  "prohibited
transaction"  penalty taxes as defined in Section 860F of the Code, if, when and
as the same shall be due and payable and (B) any tax on contributions to a REMIC
after the Closing Date  imposed by Section  860G(d) of the Code (and the Trustee
may in its absolute  discretion  determine  when any such tax is due and payable
and whether to pay such tax, to pay and contest such tax or to withhold  payment
of such tax, if permitted by law, pending the outcome of any such  proceedings);
(viii)  provide to the  Certificateholders  such data  reasonably  necessary for
their original issue discount computations and market discount computations with
respect to the  Certificates  for federal  income tax purposes  based on pricing
information  provided by the Depositor to the Trustee (and upon notice  thereof,
the Trustee  shall  promptly  correct any errors in such data);  and (ix) as and
when necessary and appropriate,  represent the Trust Fund in any  administrative
or judicial  proceedings relating to an examination or audit by any governmental
taxing authority, request an administrative adjustment as to any taxable year of
the Trust Fund, enter into settlement  agreements with any  governmental  taxing
agency,  extend any statute of limitations relating to any tax item of the Trust
Fund,  and  otherwise  act on behalf of the Trust  Fund in  relation  to any tax
matter  involving the Trust Fund or  controversy  involving the Trust Fund.  The
legal  expenses and costs of such action and any liability  resulting  therefrom
shall be  expenses,  costs and  liabilities  of the Trust Fund,  and the Trustee
shall be entitled to be reimbursed  therefor out of amounts  attributable to the
Underlying  Certificates on deposit in the Trust Certificate Account as provided
by Section 3.04 and, on the Payment Date(s)  following such  reimbursement,  the
aggregate  of such  expenses  and costs as well as all taxes paid by the Trustee
pursuant  to clause  (vii)  above (to the extent that such taxes are not imposed
due to a negligent failure by the Trustee to perform any obligation specifically
undertaken  by the Trustee  pursuant to this  Agreement)  shall be  allocated in
reduction of the Accrued Certificate  Interest on each Class entitled thereto in
the same manner as if such expenses and costs constituted a Prepayment  Interest
Shortfall. The Trustee shall sign all Tax Returns relating to the Trust Fund.

     (b) Within 30 days after the Closing  Date,  the Trustee  shall prepare and
file with the Internal Revenue Service Form 8811,  "Information  Return for Real
Estate Mortgage  Investment Conduits (REMICs) and Issuers of Collateralized Debt
Obligations" for the Trust Fund.

     (c) If at any time the  Trustee,  as an  Underlying  Certificateholder,  is
requested in such  capacity to take any action or to give any consent,  approval
or waiver,  including without  limitation in connection with an amendment of the
related Underlying Agreement or if an Event of Default as defined in the related
Underlying Agreement occurs under the related Underlying Agreement, the Trustee,
in its  capacity  as an  Underlying  Certificateholder,  may take such action in
connection  with the  enforcement of any rights and remedies  available to it in
such  capacity  with  respect  thereto but only in  accordance  with the written
directions  of Holders of  Certificates  entitled  to at least 51% of the Voting
Rights. The Trustee shall promptly notify all of the  Certificateholders  of any
such request.



                                       15
<PAGE>

     (d)   Following   the  Startup  Day,  the  Trustee  shall  not  accept  any
contributions  of assets to the REMIC unless the Trustee has received an Opinion
of Counsel (at the expense of the party  seeking to make such  contribution)  to
the effect  that the  inclusion  of such  assets in the REMIC will not cause the
REMIC  to fail to  qualify  as a REMIC at any time  that  any  Certificates  are
outstanding or subject the REMIC to any tax under the REMIC  Provisions or other
applicable provisions of federal, state and local law or ordinances.]

     Section 3.02. Collection of Monies.

     (a) [In the  event the  Trustee  does not  receive  any  Distribution  Date
Statement in connection  with its receipt of any  distribution  on an Underlying
Certificate  on any  Distribution  Date,  and,  in the  case  of the  Underlying
Re-REMIC Certificates, the Underlying Re-REMIC Distribution Date Statements with
respect to the Underlying  Certificates,  the Trustee shall use its best efforts
to contact the related  trustee to obtain such  Distribution  Date Statement and
Underlying  Re-REMIC  Distribution  Date Statements as soon as possible and will
confirm that the amount of principal and interest distributions received on such
Distribution   Date  equals  the  distribution   amount  shown  on  the  related
Distribution  Date Statement.  If such amounts differ,  the Trustee will use its
best efforts to contact the trustee for the Underlying  Certificates  to attempt
to reconcile such difference.  If such distribution and the related Distribution
Date Statement and any Underlying  Re-REMIC  Distribution  Date Statements shall
not have been  received by the Trustee by the close of business one Business Day
following the day on which such  distribution  was to be received by the Trustee
or the Trustee shall gain actual  knowledge of any Event of Default under and as
defined in the related Underlying  Agreement,  the Trustee shall promptly notify
the  Depositor  and the  Certificateholders  and such parties  shall  proceed in
accordance with the terms and conditions of Section  3.01(c).  Any  distribution
received,  or with  respect  to which the  Distribution  Date  Statement  or any
Underlying Re-REMIC  Distribution Date Statements are received,  subsequent to a
Payment Date shall be deposited in the Trust Certificate Account and distributed
on the next succeeding Payment Date.

     (b) Except as  otherwise  provided in Section  6.01,  upon its receipt of a
Notice of Final  Distribution,  the  Trustee  shall  present and  surrender  the
Underlying  Certificate to which such notice applies,  for final payment thereon
in accordance with the terms and conditions of the related Underlying  Agreement
and such Notice of Final Distribution. The Trustee shall promptly deposit in the
Trust Certificate Account the final distribution  received upon presentation and
surrender of any Underlying Certificate.]

     Section 3.03. Establishment of Trust Certificate Account; Deposits in Trust
Certificate Account.

     (a) The Trustee, for the benefit of the Certificateholders, shall establish
and  maintain  one  or  more  accounts  (collectively,  the  "Trust  Certificate
Account"),   each   of   which   shall   be  an   Eligible   Account,   entitled
"________________,  in trust for the  registered  holders of Credit Suisse First
Boston Mortgage Securities Corp., Trust  Certificates,  Series 200_-__," held in
trust by the  Trustee  for the  benefit of the  Certificateholders.  The Trustee
shall cause the following  payments and collections in respect of the Underlying
Certificates to be deposited directly into the Trust Certificate Account:



                                       16
<PAGE>

     (i)  all  distributions  due and  received on the  Underlying  Certificates
          subsequent to the Cut-off Date;

     (ii) any amounts  received in  connection  with the sale of the  Underlying
          Certificates  pursuant to Section  6.01 in  accordance  with a plan of
          complete liquidation of the Trust Fund; and

     (iii)any other amounts  specifically  required to be deposited in the Trust
          Certificate Account hereunder.

     The foregoing  requirements  for deposit in the Trust  Certificate  Account
shall be exclusive.

     (b) Funds in a Trust Certificate  Account may be invested by the Trustee in
Permitted  Investments  in accordance  with the  provisions set forth in Section
3.08.  The Trustee  shall give notice to the  Depositor  of the location of each
Trust  Certificate  Account upon  establishment  thereof and prior to any change
thereof.

     Section 3.04. Permitted Withdrawals From the Trust Certificate Account.

     The Trustee may from time to time withdraw funds from the Trust Certificate
Account for the following purposes:

     (i)  to pay to the Trustee on each Payment  Date, as  compensation  for its
          services  hereunder,  the Trustee  Fee, any Trustee Fee due on a prior
          Payment Date remaining  unpaid,  permitted  expenses of the Trustee as
          set forth in the Trustee Fee  Agreement and any  investment  income on
          amounts in the Trust Certificate Account;

     (ii) to make distributions in the amounts and in the manner provided for in
          Section 3.05;

     (iii)to reimburse  the  Depositor  or the Trustee for expenses  incurred by
          and  reimbursable to the Depositor or the Trustee  pursuant to Section
          3.01(a) or 7.03 or as otherwise permitted under this Agreement; and

     (iv) to  clear  and  terminate  the  Trust  Certificate  Account  upon  the
          termination of this Agreement.

     Section 3.05. Distributions.

     (a) [CASH FLOW PROVISIONS TO BE INSERTED AS APPROPRIATE]

     (b) Except as otherwise provided in Section 6.01,  whenever the Trustee, as
of [five]  Business Days prior to any Record Date, has received  notice that the
final distribution with respect to any Class of Certificates will be made on the
related Payment Date, the Trustee shall, no later than such related Record Date,
mail to each Holder on such date of such Class of  Certificates  a notice to the
effect that:




                                       17
<PAGE>

     (i)  the  Trustee has  received  notice  that the final  distribution  with
          respect to such  Class of  Certificates  will be made on such  Payment
          Date but only upon  presentation and surrender of such Certificates at
          the office of the Trustee therein specified, and

     (ii) no  interest  shall  accrue on such  Certificates  from and after such
          final Payment Date.

     (c) Each  distribution  with respect to a Book-Entry  Certificate  shall be
paid  to the  Depository,  as  Holder  thereof,  and  the  Depository  shall  be
responsible for crediting the amount of such distribution to the accounts of its
Depository   Participants  in  accordance  with  its  normal  procedures.   Each
Depository  Participant shall be responsible for disbursing such distribution to
the  Certificate  Owners that it represents  and to each indirect  participating
brokerage firm (a "brokerage firm" or "indirect  participating  firm") for which
it acts as agent.  Each brokerage firm shall be responsible for disbursing funds
to  the  Certificate  Owners  that  it  represents.  None  of the  Trustee,  the
Certificate  Registrar or the Depositor shall have any  responsibility  therefor
except as otherwise provided by this Agreement or applicable law.

     Section 3.06. Statements to Certificateholders.

     On each  Payment  Date to the extent the Trustee has  received  the related
Distribution  Date Statement for the Underlying  Certificates  on the Underlying
Certificate  Distribution  Date, the Trustee shall prepare and forward by mail a
statement as to the  distributions on the Underlying  Certificates  made on such
Distribution Date and, in the case of the Underlying Re-REMIC Certificates,  the
Underlying Re-REMIC  Distribution Date Statements with respect to the Underlying
Certificates,  if received, and a statement to each Certificateholder and to the
Depositor stating:

     (i)  the Available Funds for such Payment Date;

     (ii) with respect to such Payment  Date,  the  aggregate  amount of Accrued
          Certificate  Interest and the aggregate Principal  Distribution Amount
          and  the  amounts  of  principal  and  interest   distributed  to  the
          Certificateholders  of each Class of Certificates on such Payment Date
          pursuant to Section 3.05;

     (iii)the aggregate  amount of  distributions  on the Class R Certificate on
          such Payment Date pursuant to Section 3.05, if any;

     (iv) the   Certificate   Principal   Balance   of  each  Class  of  Regular
          Certificates after giving effect to distributions of principal of such
          Certificates on such Payment Date;

     (v)  the Underlying  Certificate Balance for each Underlying Certificate as
          of the  Distribution  Date  immediately  preceding  such Payment Date,
          after giving effect to the  distribution  of principal made thereon on
          such  Distribution  Date and the amount of any  Realized  Losses  with
          respect to



                                       18
<PAGE>


          each   Underlying   Certificate   applied  to  reduce  the  Underlying
          Certificate Balance thereof on such Distribution Date;

     (vi) the amount of any reductions in the Certificate  Principal  Balance of
          each Class of Regular Certificates or the Accrued Certificate Interest
          distributable thereon; and

     (vii)the amount of Accrued Certificates  Interest on any Payment Date which
          was not distributed on such Payment Date.

     In the case of the  information  furnished  pursuant  to clauses  (i)-(iii)
above,  the  amounts  shall  also be  expressed  as a dollar  amount  per Single
Certificate of the applicable Class.

     In addition, the Trustee promptly will furnish to Certificateholders copies
of any notices,  statements,  reports or other communications including, without
limitation,  the  Distribution  Date  Statements  and  the  Underlying  Re-REMIC
Distribution Date Statements for each Distribution Date, received by the Trustee
as the Underlying Certificateholder.

     On or before __________ of each calendar year, beginning with calendar year
200_,  the Trustee  shall prepare and deliver by first class mail to each Person
who at any time during the previous  calendar  year was a  Certificateholder  of
record a statement  containing the  information  required to be contained in the
regular monthly report to Certificateholders,  as set forth in clause (ii) above
aggregated for such calendar year or the applicable portion thereof during which
such Person was a  Certificateholder.  Such  obligation  of the Trustee shall be
deemed  to have been  satisfied  to the  extent  that  substantially  comparable
information shall be provided by the Trustee pursuant to any requirements of the
Code and regulations thereunder as from time to time are in force.

     Upon the written request of any Certificateholder,  the Trustee, as soon as
reasonably   practicable,   shall  provide  the   Certificateholder   with  such
information  as has been provided by the Depositor to the Trustee,  for purposes
of satisfying applicable information reporting requirements under Rule 144A.

     Section 3.07. Access to Certain Documentation and Information.

     The Trustee shall provide to the Certificateholders  access to Certificates
and all reports,  documents and records  maintained by the Trustee in respect of
its duties  hereunder,  such access being afforded  without charge but only upon
reasonable  written  request no less than two Business Days prior to such access
and during normal business hours at offices designated by the Trustee.

     Section 3.08. Permitted Investments.

     The Trustee may direct any institution  maintaining  the Trust  Certificate
Account  to invest  the funds in such Trust  Certificate  Account  in  Permitted
Investments,  which shall  mature not later than the  Business  Day  immediately
preceding the next Payment Date (except that any  investment in the  institution
with  which the Trust  Certificate  Account  is  maintained  may  mature on such
Payment Date). All such Permitted Investments shall be made in the name of the



                                       19
<PAGE>

Trustee,  in trust for the  Holders of the  Certificates,  or its  nominee.  All
income and gain  received  from any such  investment  shall be  deposited in the
appropriate Trust Certificate  Account and may only be withdrawn and applied for
the purposes set forth in Section 3.04.

     Section 3.09. Sale of Defective Assets.

     Upon  the  discovery  by the  Depositor  or  the  Trustee  that  any of the
Underlying  Certificates are not REMIC regular interests or that any other asset
of the REMIC is not a permitted  asset,  the party  discovering  such fact shall
give prompt  written  notice to the other  party.  The  Trustee  shall sell such
Underlying  Certificate  (or other asset, as the case may be) upon the terms and
at the direction of the Depositor  within 90 days of such  discovery and any tax
resulting  therefrom not borne by the Trustee pursuant to Article V hereof shall
be payable out of the Trust Fund  ratably  among all of the Classes to which the
prohibited transaction relates.

     Section 3.10. Modification of Underlying Certificates.

     Notwithstanding  any contrary provision herein, the Trustee will not permit
the  modification  of any Underlying  Certificate  without an Opinion of Counsel
which shall not be an expense of the Trustee  that such  modification  would not
(i) endanger the status of the REMIC as a REMIC or (ii) result in the imposition
of a tax upon the REMIC  (including  but not  limited  to the tax on  prohibited
transactions  as  defined  in  Section  860F(a)(2)  of the  Code  and the tax on
contributions to a REMIC set forth in Section 860G(d) of the Code).

                                   ARTICLE IV

                             THE TRUST CERTIFICATES

     Section 4.01. The Certificates.

     The  Certificates  shall be substantially in the respective forms set forth
in Exhibits A, B, C and D hereto.  The Class A, Class B and Class M Certificates
are issuable in minimum initial Certificate Principal Balances as of the Closing
Date of  $[25,000]  plus  integral  multiples  of  $[1,000]  in excess  thereof;
provided,  however,  that one Class B  Certificate  may be issued in an  initial
denomination  equal to an integral  multiple of $[25,000],  plus the excess,  if
any, of the Initial Certificate Principal Balance of such Class over the largest
integral  multiple  of $[1,000]  less than such  Initial  Certificate  Principal
Balance.  The Class R Certificate will be issuable in fully registered form as a
single  Certificate  evidencing a 100%  Percentage  Interest.  The  Certificates
shall,  on original  issue,  be executed by the Trustee,  not in its  individual
capacity but solely as Trustee,  and delivered by the Trustee to the Certificate
Registrar for  authentication and delivery to or upon the order of the Depositor
upon  receipt  by the  Trustee  of the  Underlying  Certificates  and any  other
documents  which  are  required  by this  Agreement  or which  the  Trustee  may
reasonably request.

     The  Certificates  shall be executed by manual  signature  on behalf of the
Trustee  in  its  capacity  as  trustee  hereunder  by  an  authorized  officer.
Certificates  bearing the manual  signatures of individuals who were at any time
the proper officers of the Trustee shall bind the Trustee,  notwithstanding that
such  individuals  or any of them have ceased to hold such offices  prior to the
authentication and delivery of such Certificates or did not hold such offices at
the



                                       20
<PAGE>


date of such Certificates. No Certificate shall be entitled to any benefit under
this  Agreement,  or be valid for any  purpose,  unless  there  appears  on such
Certificate a certificate of  authentication  substantially in the form provided
for herein executed by the Certificate  Registrar by manual signature,  and such
certificate  upon any  Certificate  shall be conclusive  evidence,  and the only
evidence,  that such  Certificate  has been  duly  authenticated  and  delivered
hereunder. All Certificates shall be dated the date of their authentication.

     The Class A, Class B and Class M Certificates  shall initially be issued as
one or more Certificates registered in the name of the Depository or its nominee
and, except as provided  below,  registration  of such  Certificates  may not be
transferred by the Trustee except to another Depository that agrees to hold such
Certificates  for the respective  Certificate  Owners with  Ownership  Interests
therein. The Holders of the Book-Entry  Certificates shall hold their respective
Ownership  Interests in and to each of the Book-Entry  Certificates  through the
book-entry facilities of the Depository and, except as provided below, shall not
be entitled to Definitive  Certificates in respect of such Ownership  Interests.
All transfers by Certificate Owners of their respective  Ownership  Interests in
the  Book-Entry  Certificates  shall be made in accordance  with the  procedures
established by the Depository  Participant or brokerage firm  representing  such
Certificate  Owner.  Each  Depository  Participant  shall transfer the Ownership
Interests  only  in  the  Book-Entry   Certificates  of  Certificate  Owners  it
represents or of brokerage  firms for which it acts as agent in accordance  with
the Depository's normal procedures.

     The Trustee and the Depositor may for all purposes (including the making of
payments due on the respective Classes of Book-Entry Certificates) deal with the
Depository  as the  authorized  representative  of the  Certificate  Owners with
respect to the respective Classes of Book-Entry Certificates for the purposes of
exercising the rights of Certificateholders hereunder. The rights of Certificate
Owners with respect to the respective  Classes of Book-Entry  Certificates shall
be limited to those  established by law and agreements  between such Certificate
Owners and the Depository  Participants  and brokerage firms  representing  such
Certificate  Owners.  Multiple  requests and directions  from, and votes of, the
Depository as Holder of any Class of Book-Entry Certificates with respect to any
particular matter shall not be deemed inconsistent if they are made with respect
to different  Certificate  Owners. The Trustee may establish a reasonable record
date  in  connection   with   solicitations   of  consents  from  or  voting  by
Certificateholders and shall give notice to the Depository of such record date.

     If (i)(A) the Depositor  advises the Trustee in writing that the Depository
is no longer  willing or able to  properly  discharge  its  responsibilities  as
Depository  and (B) the  Depositor is unable to locate a qualified  successor or
(ii) the  Depositor at its option  advises the Trustee in writing that it elects
to terminate the  book-entry  system through the  Depository,  the Trustee shall
notify all Certificate Owners, through the Depository,  of the occurrence of any
such event and of the  availability  of Definitive  Certificates  to Certificate
Owners  requesting  the same.  Upon  surrender to the Trustee of the  Book-Entry
Certificates by the Depository,  accompanied by registration  instructions  from
the  Depository  for  registration  of  transfer,  the  Trustee  shall issue the
Definitive  Certificates.  Neither  the  Depositor,  nor  the  Trustee,  nor any
Affiliate  of  either  thereof  shall be  liable  for any  actions  taken by the
Depository or its nominee, including,  without limitation, any delay in delivery
of such  instructions  and may  conclusively  rely on, and shall be protected in
relying on, such instructions.  Upon the issuance of Definitive Certificates all
references  herein  to  obligations  imposed  upon  or to be  performed  by  the
Depositor in connection



                                       21
<PAGE>


with the issuance of the Definitive  Certificates pursuant to this Section shall
be deemed to be imposed upon and performed by the Trustee, and the Trustee shall
recognize  the  Holders of the  Definitive  Certificates  as  Certificateholders
hereunder.

     Section 4.02. Registration of Transfer and Exchange of Certificates.

     (a) The Trustee shall cause to be kept at one of the offices or agencies to
be appointed by the Trustee in  accordance  with the  provisions of this Section
4.02 a Certificate Register in which, subject to such reasonable  regulations as
it may prescribe, the Trustee shall provide for the registration of Certificates
and of transfers and exchanges of Certificates as herein  provided.  The Trustee
is initially  appointed  Certificate  Registrar  for the purpose of  registering
Certificates  and transfers and exchanges of  Certificates  as herein  provided.
Upon  satisfaction of the conditions set forth below,  the Trustee shall execute
and the Certificate Registrar shall authenticate and deliver, in the name of the
designated  transferee or  transferees,  one or more new  Certificates of a like
Class and aggregate Percentage Interest.  In addition,  the Trustee shall notify
the Depositor of each transfer or exchange of the Certificates.

     (b) At the option of the Certificateholders,  Certificates may be exchanged
for other Certificates of authorized denominations of a like Class and aggregate
Percentage  Interest,  upon surrender of the Certificates to be exchanged at any
such office or agency. Whenever any Certificates are so surrendered for exchange
the Trustee shall execute and the Certificate  Registrar shall  authenticate and
deliver the  Certificates of such Class which the  Certificateholder  making the
exchange is entitled to receive.  Every Certificate presented or surrendered for
transfer  or exchange  shall (if so  required by the Trustee or the  Certificate
Registrar) be duly  endorsed by, or be  accompanied  by a written  instrument of
transfer in form satisfactory to the Trustee and the Certificate  Registrar duly
executed by, the Holder thereof or his attorney duly authorized in writing.

     (c) Except as provided in Section  4.02(d),  no transfer,  sale,  pledge or
other  disposition of a Certificate  shall be made unless such  transfer,  sale,
pledge or other disposition (1) is exempt from the registration  requirements of
the  Securities  Act of 1933 (the "1933 Act"),  as amended,  and any  applicable
state  securities laws or is registered or qualified in accordance with the 1933
Act and such laws and (2) is made in accordance with Rule  3a-7(a)(2)  under the
Investment Company Act of 1940. In the event that a Transfer of a Certificate is
to be made under this Section  4.02(c),  (i) the Trustee or the Depositor  shall
require a written  Opinion of Counsel  acceptable  to and in form and  substance
satisfactory  to the Trustee and the  Depositor  that such  Transfer may be made
pursuant  to an  exemption  from the 1933 Act made  pursuant to the 1933 Act and
such laws,  which  Opinion of Counsel  shall not be an expense of the Trustee or
the  Depositor,  and (ii) the Trustee shall require the  transferee to execute a
representation  letter,  substantially in the form of Exhibit F hereto,  and the
Trustee  shall  require  the  transferor  to  execute a  representation  letter,
substantially  in the form of  Exhibit G hereto,  acceptable  to and in form and
substance  satisfactory  to the  Depositor  and the  Trustee  certifying  to the
Trustee and the Depositor the facts surrounding such Transfer,  which investment
letter shall not be an expense of the Trustee or the Depositor.  The Holder of a
Certificate desiring to effect such transfer,  sale, pledge or other disposition
shall,  and does hereby agree to,  indemnify the Trustee,  the Depositor and the
Certificate  Registrar  against any  liability  that may result if the transfer,
sale,  pledge or other disposition is not so exempt or is not made in accordance
with such federal and state laws.




                                       22
<PAGE>

     (d)  Transfers of  Certificates  may also be made in  accordance  with this
Section  4.02(d) if the  prospective  transferee of a  Certificate  provides the
Trustee and the Depositor with an investment letter substantially in the form of
Exhibit H attached hereto,  which  investment  letter shall not be an expense of
the Trustee or the Depositor,  and which  investment  letter states that,  among
other  things,  such  transferee  (i) is a  "qualified  institutional  buyer" as
defined  under Rule 144A,  acting for its own  account or the  accounts of other
"qualified  institutional  buyers" as defined under Rule 144A, and (ii) is aware
that the proposed  transferor intends to rely on the exemption from registration
requirements  under the 1933 Act provided by Rule 144A.  Such transfers shall be
deemed  to have  complied  with the  requirements  of  Section  4.02(c)  hereof;
provided,  however,  that no  Transfer  of any of the  Certificates  may be made
pursuant to this Section  4.02(d) by the Depositor.  The Holder of a Certificate
desiring to effect such Transfer does hereby agree to indemnify the Trustee, the
Depositor and the Certificate Registrar against any liability that may result if
the Transfer is not made in accordance with this Agreement.

     (e) Notwithstanding Sections 4.02(c), (d) and (f), an Opinion of Counsel or
certification  will not be required with respect to the transfer of any Class A,
Class B or Class M Certificate to a Depository,  or for any subsequent  transfer
of any  interest  in such a  Certificate  for so long as such  Certificate  is a
Book-Entry  Certificate.  Any  Transferee  of a Book-Entry  Certificate  will be
deemed  to have  represented  by  virtue  of its  purchase  or  holding  of such
Certificate  (or  interest  therein)  that (A) either (a) it is not,  and is not
purchasing  on behalf  of,  any Plan or using the "plan  assets"  of any Plan to
effect such purchase and the holding of any  Certificate or (b) such  Transferee
is an insurance company  acquiring such  Certificates  solely with assets of its
general account in a transaction  satisfying the conditions to the applicability
of  exemptive  relief  under  Sections  I and III of U.S.  Department  of  Labor
Prohibited  Transaction  Class  Exemption  95-60  and (B) such  Transferee  is a
"qualified  institutional  buyer" as defined under Rule 144A, acting for its own
account or the accounts of other "qualified  institutional buyers", and is aware
that the proposed  transferor intends to rely on the exemption from registration
requirements under the 1933 Act provided by Rule 144A. Any purported Certificate
Owner whose  acquisition or holding of any Book-Entry  Certificate  (or interest
therein) was effected in violation of the  restrictions  in this Section 4.02(e)
shall indemnify and hold harmless the Depositor,  the Trustee and the Trust Fund
from and against any and all liabilities,  claims, costs or expenses incurred by
such parties as a result of such acquisition or holding.

     (f) In the  case  of any  Certificate  presented  for  registration  by the
Trustee,  the Trustee  shall not register  the  purchase or transfer  unless the
prospective  purchaser or transferee provides the Trustee and the Depositor with
a representation  in the form set forth in Exhibit F or Exhibit H that (i) it is
not, and is not  purchasing on behalf of, any Plan or using the "plan assets" of
any Plan to effect such purchase and the holding of any Certificate;  or (ii) in
the case of a Regular Certificate,  it has delivered an Opinion of Counsel which
shall be acceptable to and in form and substance satisfactory to the Trustee and
the Depositor, to the effect that the purchase or holding of such Certificate is
permissible  under applicable law, will not constitute or result in a non-exempt
prohibited  transaction under Section 406 or 407 of ERISA or Section 4975 of the
Code,  and will not subject the Trustee or the  Depositor to any  obligation  or
liability  (including  obligations or liabilities under ERISA or Section 4975 of
the Code) in addition to those  explicitly  undertaken in this Agreement,  which
Opinion of Counsel shall not be an expense of the Trustee or the  Depositor;  or
(iii) in the case of a Regular  Certificate,  it is an insurance company,  it is
acquiring the Certificates  solely with assets of its general account,  and such
general account



                                       23
<PAGE>

satisfies the  conditions to the  applicability  of exemptive  relief  available
under  Sections I and III of U.S.  Department  of Labor  Prohibited  Transaction
Class Exemption 95-60.

     (g) [(i) No  transfer  of the  Class R  Certificate  may be made  except to
"qualified  institutional  buyers" who have  complied with the  requirements  of
Section 4.02(d) hereof or to the Depositor or an Affiliate of the Depositor.  In
addition,  each Person who has or who acquires any Ownership Interest in a Class
R Certificate shall be deemed by the acceptance or acquisition of such Ownership
Interest to have agreed to be bound by the following  provisions.  The rights of
each  Person  acquiring  any  Ownership  Interest in a Class R  Certificate  are
expressly subject to the following provisions:

     (A)  Each Person  holding or acquiring any Ownership  Interest in a Class R
          Certificate shall be a United States Person and a Permitted Transferee
          and shall  promptly  notify the  Trustee  of any  change or  impending
          change in its status as a Permitted Transferee.

     (B)  In connection with any proposed Transfer of any Ownership  Interest in
          a Class R  Certificate  to a United States  Person,  the Trustee shall
          require  delivery to it, and shall not  register  the  Transfer of any
          Class R  Certificate  until  its  receipt  of,  (I) an  affidavit  and
          agreement (a "Transfer  Affidavit and  Agreement"  attached  hereto as
          Exhibit  I-1)  from  the   proposed   Transferee,   representing   and
          warranting,  among other things,  that it is a United  States  Person,
          that  such  Transferee  is a  Permitted  Transferee,  that  it is  not
          acquiring  its Ownership  Interest in the Class R Certificate  that is
          the subject of the  proposed  Transfer as a nominee,  trustee or agent
          for any Person who is not a Permitted Transferee,  that for so long as
          it retains its Ownership  Interest in a Class R  Certificate,  it will
          endeavor to remain a Permitted  Transferee,  and that it has  reviewed
          the provisions of this Section  4.02(g) and agrees to be bound by them
          and (II) a  Certificate,  attached  hereto as  Exhibit  I-2,  from the
          Holder wishing to transfer the Class R Certificate,  representing  and
          warranting,  among  other  things,  that no  purpose  of the  proposed
          Transfer is to impede the assessment or collection of tax.

     (C)  Notwithstanding  the delivery of a Transfer Affidavit and Agreement by
          a proposed  Transferee  under  clause (B) above,  if the  Trustee  has
          actual  knowledge  that the  proposed  Transferee  is not a  Permitted
          Transferee,  no  Transfer  of  an  Ownership  Interest  in a  Class  R
          Certificate to such proposed Transferee shall be effected.

     (D)  Each Person  holding or acquiring any Ownership  Interest in a Class R
          Certificate  shall  agree (x) to  require  a  Transfer  Affidavit  and
          Agreement  from any  other  Person  to whom such  Person  attempts  to
          transfer its Ownership  Interest in a Class R Certificate  and (y) not
          to transfer its Ownership Interest unless it provides a certificate to
          the Trustee in the form attached hereto as Exhibit I-2.

     (E)  Each Person  holding or acquiring  an Ownership  Interest in a Class R
          Certificate,  by purchasing an Ownership Interest in such Certificate,
          agrees to give the Trustee  written notice that it is a  "pass-through
          interest holder" within the meaning of Temporary Treasury  Regulations
          1.67-3T(a)(2)(A) immediately upon acquiring an

                                       24
<PAGE>



          Ownership  Interest in a Class R Certificate,  if it is, or is holding
          an  Ownership  Interest  in a Class R  Certificate  on  behalf  of,  a
          "pass-through interest holder."

               (ii) The  Trustee  will  register  the  Transfer  of any  Class R
          Certificate only if it shall have received the Transfer  Affidavit and
          Agreement, a Certificate of the Holder requesting such transfer in the
          form attached hereto as Exhibit I-2 and all of such other documents as
          shall have been  reasonably  required by the Trustee as a condition to
          such registration.  Transfers of the Class R Certificate to Non-United
          States  Persons  and  Persons  other than  Permitted  Transferees  are
          prohibited.

               (iii) The Trustee  shall be under no  liability to any Person for
          any  registration of Transfer of a Class R Certificate that is in fact
          not  permitted by this Section  4.02(g) or for making any payments due
          on such  Certificate  to the  holder  thereof  or for taking any other
          action  with  respect  to such  holder  under the  provisions  of this
          Agreement.

               (iv) The Trustee shall make available all  information  necessary
          to  compute  any tax  imposed  (A) as a result of the  Transfer  of an
          Ownership  Interest to any Person who is not a  Permitted  Transferee,
          including the information  regarding "excess inclusions" of such Class
          R Certificate  required to be provided to the Internal Revenue Service
          and  certain  Persons as  described  in Treasury  Regulation  Sections
          1.860D-1(b)(5)  and  1.860E-2(a)(5),  and  (B)  as  a  result  of  any
          regulated  investment  company,  real estate investment trust,  common
          trust fund,  partnership,  trust, estate or organizations described in
          Section  1381 of the Code  having as among its  record  holders at any
          time  any  Person  who  is  not  a  Permitted  Transferee.  Reasonable
          compensation  for providing  such  information  may be required by the
          Trustee.

               (v) The  provisions  of this  Section  4.02(g) set forth prior to
          this Section (v) may be modified,  added or eliminated,  provided that
          there shall have been delivered to the Trustee:

               (A)  written  notification  from the Rating  Agency to the effect
          that the modification, addition or elimination of such provisions will
          not cause such Rating Agency to downgrade its then-current  ratings of
          the Certificates; and

               (B) an Opinion of  Counsel,  which shall not be an expense of the
          Trustee, to the effect that such modification,  addition or absence of
          such provisions will not cause the Trust Fund to cease to qualify as a
          REMIC and will not (subject to Section  5.01(b)  hereof) cause (x) the
          Trust Fund to be subject to an entity-level tax caused by the Transfer
          of any  Class  R  Certificate  to a  Person  that  is not a  Permitted
          Transferee or (y) a Certificateholder  or another Person to be subject
          to a REMIC-related tax caused by the Transfer of a Class R Certificate
          to a  Non-United  States  Person or a Person  that is not a  Permitted
          Transferee.]

     (h) No  service  charge  shall  be made for any  transfer  or  exchange  of
Certificates  of any  Class,  but  the  Trustee  may  require  payment  of a sum
sufficient  to cover  any tax or  governmental  charge  that may be  imposed  in
connection with any transfer or exchange of Certificates.





                                       25
<PAGE>

     (i) All  Certificates  surrendered  for  transfer  and  exchange  shall  be
destroyed by the Certificate Registrar.

     Section 4.03. Mutilated, Destroyed, Lost or Stolen Certificates.

     If  (i)  any  mutilated  Certificate  is  surrendered  to  the  Certificate
Registrar,  or the Trustee and the  Certificate  Registrar  receive  evidence to
their  satisfaction of the destruction,  loss or theft of any  Certificate,  and
(ii) there is  delivered  to the  Trustee  and the  Certificate  Registrar  such
security or indemnity as may be required by them to save each of them  harmless,
then, in the absence of notice to the Trustee or the Certificate  Registrar that
such  Certificate has been acquired by a bona fide purchaser,  the Trustee shall
execute  and the  Certificate  Registrar  shall  authenticate  and  deliver,  in
exchange  for or in lieu  of any  such  mutilated,  destroyed,  lost  or  stolen
Certificate,  a new Certificate of like tenor, Class and Percentage Interest but
bearing a number not contemporaneously outstanding. Upon the issuance of any new
Certificate  under this  Section,  the  Trustee may require the payment of a sum
sufficient to cover any tax or other governmental  charge that may be imposed in
relation thereto and any other expenses  (including the fees and expenses of the
Trustee  and the  Certificate  Registrar)  connected  therewith.  Any  duplicate
Certificate  issued  pursuant to this  Section  shall  constitute  complete  and
indefeasible  evidence of ownership in the Trust Fund, as if originally  issued,
whether or not the lost,  stolen or destroyed  Certificate shall be found at any
time.

     Section 4.04. Persons Deemed Owners.

     Prior to due  presentation of a Certificate  for  registration of transfer,
the  Depositor,  the Trustee,  the  Certificate  Registrar  and any agent of the
Depositor,  the  Trustee or the  Certificate  Registrar  may treat the Person in
whose name any  Certificate is registered as the owner of such  Certificate  for
the purpose of  receiving  distributions  pursuant  to Section  3.05 and for all
other  purposes  whatsoever,   and  neither  the  Depositor,  the  Trustee,  the
Certificate  Registrar  nor any  agent  of the  Depositor,  the  Trustee  or the
Certificate  Registrar  shall be  affected by notice to the  contrary  except as
provided in Section 4.02(g).

                                   ARTICLE V

                                   THE TRUSTEE

     Section 5.01. Duties of Trustee.

     (a) The Trustee  undertakes  to perform such duties and only such duties as
are specifically set forth in this Agreement.

     (b) The Trustee, upon receipt of all resolutions, certificates, statements,
opinions,  reports,  documents,  orders or other  instruments  furnished  to the
Trustee  which  are  specifically  required  to be  furnished  pursuant  to  any
provision  of this  Agreement,  shall  examine  them to  determine  whether they
conform  to the  requirements  of  this  Agreement  and the  related  Underlying
Agreement. The Trustee shall notify the Certificateholders of any such documents
which do not  materially  conform to the  requirements  of this Agreement in the
event that the Trustee,  after so  requesting,  does not receive  satisfactorily
corrected   documents  or  a   satisfactory   explanation   regarding  any  such
nonconformities.




                                       26
<PAGE>


     The Trustee shall forward or cause to be forwarded in a timely  fashion the
notices, reports and statements required to be forwarded by the Trustee pursuant
to Sections 3.02, 3.06 and 6.01. [The Trustee covenants and agrees that it shall
take such  actions  and shall  cause the REMIC  created  hereunder  to take such
actions as are  reasonably  within the  Trustee's  control  and the scope of its
duties more  specifically set forth herein as shall be necessary or desirable to
maintain the status thereof as a REMIC under the REMIC Provisions. In performing
its duties more  specifically set forth herein,  the Trustee shall not knowingly
or  intentionally  take any  action,  cause the Trust Fund to take any action or
fail to take (or fail to cause to be taken)  any  action  reasonably  within its
control that, under the REMIC Provisions, if taken or not taken, as the case may
be,  could (i) endanger the status of the REMIC as a REMIC or (ii) result in the
imposition  of a tax upon the REMIC  (including  but not  limited  to the tax on
prohibited transactions as defined in Section 860F(a)(2) of the Code and the tax
on contributions to a REMIC set forth in Section 860G(d) of the Code) unless the
Trustee has received an Opinion of Counsel (at the expense of the party  seeking
to take such action or, if such party fails to pay such expense, and the Trustee
determines that taking such action is in the best interest of the Trust Fund and
the Certificateholders, at the expense of the Trust Fund, but in no event at the
expense of the  Trustee)  to the effect that the  contemplated  action will not,
with respect to the REMIC created hereunder, endanger such status or, unless the
Trustee,  the Depositor or both, as applicable,  determines in its or their sole
discretion  to indemnify  the Trust Fund against the  imposition  of such a tax,
result  in  the  imposition  of  such  a  tax.  Wherever  in  this  Agreement  a
contemplated  action may not be taken  because the timing of such  action  might
result  in the  imposition  of a tax on the  Trust  Fund,  or may  only be taken
pursuant to an Opinion of Counsel that such action would not impose a tax on the
Trust Fund,  such action may  nonetheless  be taken  provided that the indemnity
given in the preceding  sentence with respect to any taxes that might be imposed
on the Trust Fund has been given and that all other  preconditions to the taking
of such action have been satisfied. At all times as may be required by the Code,
the  Trustee  will to the extent  within its control and the scope of its duties
more specifically set forth herein,  maintain substantially all of the assets of
the REMIC as "qualified  mortgages" as defined in Section 860G(a)(3) of the Code
and "permitted investments" as defined in Section 860G(a)(5) of the Code.]

     (c) No  provision  of this  Agreement  shall be  construed  to relieve  the
Trustee from liability for its own negligent  action,  its own negligent failure
to act or its own willful misconduct; provided, however, that:

          (i) The duties and  obligations  of the  Trustee  shall be  determined
     solely by the express  provisions of this Agreement,  the Trustee shall not
     be liable except for the  performance of such duties and obligations as are
     specifically  set  forth  in  this  Agreement,   no  implied  covenants  or
     obligations  shall be read into this Agreement  against the Trustee and, in
     the  absence  of bad  faith on the part of the  Trustee,  the  Trustee  may
     conclusively rely, as to the truth of the statements and the correctness of
     the opinions expressed therein, upon any certificates or opinions furnished
     by the Depositor to the Trustee and which on their face, do not  contradict
     the requirements of this Agreement;

          (ii)  The  Trustee  shall  not be  personally  liable  for an error of
     judgment  made  in good  faith  by a  Responsible  Officer  or  Responsible
     Officers  of the  Trustee,  unless it shall be proved  that the Trustee was
     negligent in ascertaining the pertinent facts;




                                       27
<PAGE>

          (iii) The Trustee shall not be  personally  liable with respect to any
     action  taken,  suffered  or  omitted  to be taken  by it in good  faith in
     accordance  with the direction of  Certificateholders  of any Class holding
     Certificates  which  evidence,  as  to  such  Class,  Percentage  Interests
     aggregating  not  less  than  25% as to  the  time,  method  and  place  of
     conducting  any  proceeding  for any remedy  available to the  Trustee,  or
     exercising  any  trust or power  conferred  upon the  Trustee,  under  this
     Agreement;

          (iv) The Trustee  shall not be charged  with  knowledge of any default
     under an Underlying  Agreement unless a Responsible  Officer of the Trustee
     assigned  to and  working in the  Corporate  Trust  Office  obtains  actual
     knowledge of such failure or event or the Trustee  receives  written notice
     of such failure or event at its  Corporate  Trust Office from the Depositor
     or any Certificateholder; and

          (v) Except to the extent  provided in Section  5.02,  no  provision in
     this Agreement shall require the Trustee to expend or risk its own funds or
     otherwise incur any personal financial  liability in the performance of any
     of its duties as Trustee hereunder, or in the exercise of any of its rights
     or powers, if the Trustee shall have reasonable  grounds for believing that
     repayment of funds or adequate  indemnity against such risk or liability is
     not reasonably assured to it.

          Section 5.02. Certain Matters Affecting the Trustee.

          (a) Except as otherwise provided in Section 5.01:

          (i) The Trustee may  request  and may rely and shall be  protected  in
     acting  or   refraining   from  acting  upon  any   resolution,   Officers'
     Certificate,  certificate of auditors or any other certificate,  statement,
     instrument,  opinion,  report, notice, request,  consent, order, appraisal,
     bond or other  paper or  document  believed by it to be genuine and to have
     been signed or presented by the proper party or parties;

          (ii) The Trustee may consult  with  counsel and any Opinion of Counsel
     shall be full and complete  authorization  and protection in respect of any
     action  taken or suffered or omitted by it  hereunder  in good faith and in
     accordance with such Opinion of Counsel;

          (iii) The Trustee  shall be under no obligation to exercise any of the
     trusts or powers vested in it by this Agreement or to institute, conduct or
     defend any litigation hereunder or in relation hereto at the request, order
     or direction of any of the  Certificateholders,  pursuant to the provisions
     of this Agreement, unless such Certificateholders shall have offered to the
     Trustee  reasonable  security or indemnity against the costs,  expenses and
     liabilities which may be incurred therein or thereby;

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

          (v) The Trustee shall not be bound to make any investigation  into the
     facts  or  matters  stated  in  any  resolution,   certificate,  statement,
     instrument, opinion, report, notice,




                                       28
<PAGE>


     request,  consent, order, approval, bond or other paper or document, unless
     requested  in  writing so to do by  Holders  of  Certificates  of any Class
     evidencing,  as to such Class,  Percentage  Interests  aggregating not less
     than 50%; provided,  however,  that if the payment within a reasonable time
     to the Trustee of the costs,  expenses or liabilities likely to be incurred
     by it in the  making  of  such  investigation  is,  in the  opinion  of the
     Trustee,  not reasonably assured to the Trustee by the security afforded to
     it by the terms of this  Agreement,  the  Trustee  may  require  reasonable
     indemnity   against  such  expense  or  liability  as  a  condition  to  so
     proceeding.  The reasonable expense of every such examination shall be paid
     by the Certificateholder requesting the investigation; and

          (vi) The Trustee may execute any of the trusts or powers  hereunder or
     perform any duties  hereunder  either  directly or by or through  agents or
     attorneys.

     (b)  Following  the  issuance of the  Certificates,  the Trustee  shall not
accept  any  contribution  of  assets  to the Trust  Fund  unless it shall  have
obtained or been  furnished with an Opinion of Counsel from the party seeking to
contribute  assets  and  at  such  party's  expense  to  the  effect  that  such
contribution  will not (i) cause the Trust Fund to fail to qualify as a REMIC at
any time that any  Certificates  are  outstanding or (subject to Section 5.01(b)
hereof)  (ii)  cause the Trust Fund to be subject to any tax as a result of such
contribution  (including the imposition of any tax on "prohibited  transactions"
of the Trust Fund imposed under Section 860F(a) of the Code).

     Section   5.03.   Trustee  Not  Liable  for   Certificates   or  Underlying
Certificates.

     The  recitals  contained  herein and in the  Certificates  (other  than the
execution of the  Certificates and relating to the acceptance and receipt of the
Underlying  Certificates)  shall be taken as the statements of the Depositor and
the Trustee assumes no responsibility for their  correctness.  The Trustee makes
no representations as to the validity or sufficiency of this Agreement or of the
Certificates (except that the Certificates shall be duly and validly executed by
it as  Trustee  and  authenticated  by it as  Certificate  Registrar)  or of the
Underlying  Certificates of any related document.  Except as otherwise  provided
herein,  the Trustee shall not be accountable  for the use or application by the
Depositor of any of the Certificates or of the proceeds of such Certificates, or
for the use or  application of any funds paid to the Depositor in respect of the
Underlying  Certificates  deposited in or withdrawn  from the Trust  Certificate
Account by the Depositor.

     Section 5.04. Trustee May Own Certificates.

     The Trustee in its individual or any other capacity may become the owner or
pledgee  of  Certificates  with the  same  rights  it would  have if it were not
Trustee.

     Section 5.05. Eligibility Requirements for Trustee.

           The  Trustee  hereunder  shall  at all  times be a  corporation  or a
national  banking  association  having its principal  office in a state and city
acceptable to the Depositor and organized and doing  business  under the laws of
such  state or the  United  States of  America,  authorized  under  such laws to
exercise  corporate  trust powers,  having a combined  capital and surplus of at
least  $50,000,000 and subject to supervision or examination by federal or state


                                       29
<PAGE>



authority. If such corporation or national banking association publishes reports
of condition at least  annually,  pursuant to law or to the  requirements of the
aforesaid  supervising  or  examining  authority,  then for the purposes of this
Section the combined capital and surplus of such corporation  shall be deemed to
be its  combined  capital and surplus as set forth in its most recent  report of
condition  so  published.  In case at any time  the  Trustee  shall  cease to be
eligible in accordance  with the  provisions of this Section,  the Trustee shall
resign immediately in the manner and with the effect specified in Section 5.06.

     Section 5.06. Resignation and Removal of the Trustee.

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

     (b) If at any time the Trustee  shall  cease to be  eligible in  accordance
with the  provisions  of  Section  5.05 and shall fail to resign  after  written
request  therefor by the  Depositor,  or if at any time the Trustee shall become
incapable of acting, or shall be adjudged  bankrupt or insolvent,  or a receiver
of the Trustee or of its  property  shall be  appointed,  or any public  officer
shall take  charge or control of the  Trustee or of its  property or affairs for
the purpose of rehabilitation,  conservation or liquidation,  then the Depositor
may remove the Trustee and appoint a successor trustee by written instrument, in
duplicate,  one copy of which  instrument  shall be  delivered to the Trustee so
removed and one copy to the successor trustee.

     (c) The  Holders of Regular  Certificates  entitled  to at least 51% of the
Voting Rights may at any time remove the Trustee and appoint a successor trustee
by written instrument or instruments,  in triplicate,  signed by such Holders or
their  attorneys-in-fact duly authorized,  one complete set of which instruments
shall be delivered to the Depositor,  one complete set to the Trustee so removed
and one complete set to the successor so appointed.

     (d)  Any  resignation  or  removal  of the  Trustee  and  appointment  of a
successor trustee pursuant to any of the provisions of this Section shall become
effective upon acceptance of appointment by the successor trustee as provided in
Section 5.07.

     Section 5.07. Successor Trustee.

     (a) Any  successor  trustee  appointed  as provided  in Section  5.06 shall
execute, acknowledge and deliver to the Depositor and to its predecessor trustee
an  instrument   accepting  such  appointment   hereunder,   and  thereupon  the
resignation  or removal of the  predecessor  trustee shall become  effective and
such  successor  trustee  shall become  effective  and such  successor  trustee,
without any further act, deed or conveyance,  shall become fully vested with all
the rights,  powers, duties and obligations of its predecessor  hereunder,  with
the like  effect as if  originally  named as  trustee  herein.  The  predecessor
trustee shall deliver to the successor  trustee all Underlying  Certificates and
related documents and statements held by it hereunder, and the



                                       30
<PAGE>

Depositor and the predecessor trustee shall execute and deliver such instruments
and do such  other  things as may  reasonably  be  required  for more  fully and
certainly  vesting and  confirming  in the  successor  trustee all such  rights,
powers, duties and obligations.

     (b) No  successor  trustee  shall  accept  appointment  as provided in this
Section unless at the time of such  acceptance  such successor  trustee shall be
eligible under the provisions of Section 5.05.

     (c) Upon  acceptance of appointment  by a successor  trustee as provided in
this Section,  the Depositor shall mail notice of the succession of such trustee
hereunder  to all Holders of  Certificates  at their  addresses  as shown in the
Certificate  Register. If the Depositor fails to mail such notice within 10 days
after acceptance of appointment by the successor trustee,  the successor trustee
shall cause such notice to be mailed at the expense of the Depositor.

     Section 5.08. Merger or Consolidation of Trustee.

     Any corporation or national banking  association into which the Trustee may
be merged or converted or with which it may be  consolidated  or any corporation
or  national  banking  association  resulting  from any  merger,  conversion  or
consolidation  to which the  Trustee  shall be a party,  or any  corporation  or
national  banking  association  succeeding  to all or  substantially  all of the
corporation trust business of the Trustee, shall be the successor of the Trustee
hereunder,  provided such corporation or national banking  association  shall be
eligible under the  provisions of Section 5.05,  without the execution or filing
of any  paper  or any  further  act on the  part of any of the  parties  hereto,
anything herein to the contrary  notwithstanding.  The Trustee shall mail notice
of any such merger or consolidation to the  Certificateholders  at their address
as shown in the Certificate Register.

     Section 5.09. Appointment of Co-Trustee or Separate Trustee.

     (a)  Notwithstanding  any other  provisions  hereof,  at any time,  for the
purpose of meeting any legal  requirements of any jurisdiction in which any part
of the Trust Fund or property securing the same may at the time be located,  the
Depositor and the Trustee  acting jointly shall have the power and shall execute
and  deliver all  instruments  to appoint  one or more  Persons  approved by the
Trustee to act as  co-trustee  or  co-trustees,  jointly  with the  Trustee,  or
separate trustee or separate trustees, of all or any part of the Trust Fund, and
to vest in such Person or  Persons,  in such  capacity,  such title to the Trust
Fund, or any part thereof,  and, subject to the other provisions of this Section
5.09, such powers, duties,  obligations,  rights and trusts as the Depositor and
the Trustee may consider necessary or desirable. If the Depositor shall not have
joined in such  appointment  within 15 days after the receipt by it of a request
so to do, the Trustee  alone shall have the power to make such  appointment.  No
co-trustee or separate trustee  hereunder shall be required to meet the terms of
eligibility as a successor trustee under Section 5.05 hereunder and no notice to
Holders  of  Certificates  of  the  appointment  of  co-trustee(s)  or  separate
trustee(s) shall be required under Section 5.07 hereof.

     (b) In the case of any  appointment  of a  co-trustee  or separate  trustee
pursuant  to this  Section  5.09 all  rights,  powers,  duties  and  obligations
conferred  or imposed  upon the Trustee  shall be  conferred or imposed upon and
exercised or performed by the Trustee, and such separate


                                       31
<PAGE>


trustee or  co-trustee  jointly,  except to the extent that under any law of any
jurisdiction  in  which  any  particular  act or acts are to be  performed,  the
Trustee  shall be  incompetent  or  unqualified  to perform such act or acts, in
which event such rights,  powers, duties and obligations  (including the holding
of title to the Trust  Fund or any  portion  thereof  in any such  jurisdiction)
shall be exercised and  performed by such separate  trustee or co-trustee at the
direction of the Trustee.

     (c) Any notice,  request or other  writing  given to the  Trustee  shall be
deemed to have been given to each of the then separate trustees and co-trustees,
as  effectively  as if given to each of them.  Every  instrument  appointing any
separate  trustee or co-trustee shall refer to this Agreement and the conditions
of this Article V. Each separate trustee and co-trustee,  upon its acceptance of
the trusts conferred,  shall be vested with the estates or property specified in
its instrument of appointment, either jointly with the Trustee or separately, as
may be  provided  therein,  subject  to all the  provisions  of this  Agreement,
specifically including every provision of this Agreement relating to the conduct
of, affecting the liability of, or affording  protection to, the Trustee.  Every
such instrument shall be filed with the Trustee.

     (d) Any separate  trustee or co-trustee  may, at any time,  constitute  the
Trustee,  its agent or attorney-in-fact,  with full power and authority,  to the
extent not  prohibited  by law, to do any lawful act under or in respect of this
Agreement on its behalf and in its name.  If any separate  trustee or co-trustee
shall die, become incapable of acting, resign or be removed, all of its estates,
properties,  rights,  remedies  and trusts shall vest in and be exercised by the
Trustee,  to the extent  permitted by law,  without the  appointment of a new or
successor trustee.

     Section 5.10. Appointment of Office or Agency.

     The  Trustee  will  maintain  an office or agency in the City of  _________
where  Certificates may be surrendered for registration of transfer or exchange,
or presented  for final  distribution,  and where the office of the  Certificate
Registrar  is located.  The Trustee  initially  designates  such office to be at
________________  which  is  located  at  _____________________________________,
Attention: ________________________.

     Section 5.11. Compliance with Withholding Requirements.

     Notwithstanding  any other provision of this  Agreement,  the Trustee shall
comply with all federal  withholding  requirements  with  respect to payments to
Certificateholders  of  interest  or original  issue  discount  that the Trustee
reasonably  believes  are  applicable  under  the  Code.  Without  limiting  the
foregoing, the Trustee agrees that it will not withhold with respect to payments
of interest or original issue discount in the case of a  Certificateholder  that
has  furnished or caused to be furnished an effective  Form W-8 or an acceptable
substitute  form or a successor  form and who is not a "10 percent  shareholder"
within  the  meaning  of Code  Section  871(h)(3)(B)  or a  "controlled  foreign
corporation"  described in Code Section  871(c)(3)(C)  with respect to the Trust
Fund.  The  consent of  Certificateholders  shall not be  required  for any such
withholding.  In the event the Trustee  withholds  any amount  from  interest or
original issue discount  payments or advances  thereof to any  Certificateholder
pursuant to federal  withholding  requirements,  the Trustee shall  indicate the
amount withheld to such Certificateholder.




                                       32
<PAGE>

                                   ARTICLE VI

                                   TERMINATION

     Section 6.01. Termination.

     (a)   Subject   to   Section   6.02,   the   respective   obligations   and
responsibilities of the Depositor and the Trustee created hereby with respect to
the Certificates (other than the obligation to make certain payments and to send
certain notices to  Certificateholders as hereinafter set forth) shall terminate
immediately  upon the occurrence of the last action  required to be taken by the
Trustee on the Termination Date pursuant to this Article VI following receipt of
the final distribution to be made on the last remaining  Underlying  Certificate
in the Trust Fund upon presentation and surrender of such Underlying Certificate
in accordance with the terms and conditions of the related Underlying Agreement;
provided,  however,  that in no event shall the trust  created  hereby  continue
beyond the expiration of twenty-one years from the death of the last survivor of
the  descendants of Joseph P. Kennedy,  the late ambassador of the United States
to the United Kingdom, living on the date hereof.

     (b) Notice of any  termination  of the Trust Fund  pursuant to this Section
6.01 shall be mailed by the  Trustee  to  affected  Certificateholders  at their
addresses  shown in the  Certificate  Register as soon as practicable  after the
Trustee shall have received a Notice of Termination  but in any event,  not more
than  thirty  days,  and not  less  than  ten  days,  prior  to the  Anticipated
Termination   Date.   The   notice   mailed   by   the   Trustee   to   affected
Certificateholders shall:

     (i)  specify  the   Anticipated   Termination   Date  on  which  the  final
          distribution  is anticipated to be made to Holders of  Certificates of
          the Classes specified therein;

     (ii) specify the amount of any such final distribution, if known; and

     (iii)state that the final distribution to  Certificateholders  will be made
          only upon  presentation and surrender of Certificates at the office of
          the Trustee therein specified.

     If the Trust Fund is not terminated on the Anticipated Termination Date for
any reason,  the Trustee  shall  promptly  mail notice  thereof to each affected
Certificateholder.

     (c)  Upon   presentation   and  surrender  of  the   Certificates   by  the
Certificateholders  on the Termination Date, the Trustee shall distribute to the
Certificateholders  the amounts  otherwise  distributable  on such  Payment Date
pursuant to Section  3.05(a).  Any funds not distributed on the Termination Date
because of the failure of any  Certificateholders  to tender their  Certificates
shall  be set  aside  and  held in  trust  for the  account  of the  appropriate
non-tendering  Certificateholders,  whereupon the Trust Fund shall terminate. If
any  Certificates  as to which  notice of the  Termination  Date has been  given
pursuant to this Section 6.01 shall not have been  surrendered for  cancellation
within six months after the time  specified in such  notice,  the Trustee  shall
mail a  second  notice  to  the  remaining  Certificateholders,  at  their  last
addresses shown in the Certificate Register, to surrender their Certificates for
cancellation in order to receive,  from such funds held, the final  distribution
with respect thereto. If within one year after the



                                       33
<PAGE>

second notice any Certificate  shall not have been surrendered for cancellation,
the Trustee shall so notify the Depositor who shall upon receipt of such notice,
directly or through an agent,  take  reasonable  steps to contact the  remaining
Certificateholders  concerning  surrender of their  Certificates.  The costs and
expenses of maintaining such funds and of contacting Certificateholders shall be
paid out of the assets which  remain held.  If within two years after the second
notice any Certificates  shall not have been surrendered for  cancellation,  the
Trustee  shall pay to the  Depositor  all amounts  distributable  to the Holders
thereof and the Depositor shall  thereafter hold such amounts for the benefit of
such Holders. No interest shall accrue or be payable to any Certificateholder on
any amount held as a result of such Certificateholder's failure to surrender its
Certificate(s) for final payment thereof in accordance with this Section 6.01.

     Section 6.02. Additional Termination Requirements.

     (a) Within 90 days prior to the Anticipated  Termination  Date, the Trustee
shall adopt and the Trustee  shall sign a plan of  complete  liquidation  of the
Trust  Fund  meeting  the  requirements  of  Section  860F(a)(4)(A)  of the Code
pursuant  to which  the  Trustee  shall  sell or  otherwise  dispose  of all the
remaining  assets of the Trust Fund,  unless the Trustee has received an Opinion
of Counsel to the effect  that the  failure of the Trust Fund to comply with the
requirements  of this Section  6.02(a) will not (i) result in the  imposition of
taxes on  "prohibited  transactions"  of the Trust Fund as  described in Section
860F of the Code,  or (subject to Section  5.01(b)  hereof) (ii) cause the Trust
Fund to  fail to  qualify  as a  REMIC  at any  time  that  any  Certificate  is
outstanding.

     (b) Each Holder of a Certificate hereby  irrevocably  approves and appoints
the Trustee as its attorney-in-fact for the purposes of, adoption of the plan of
complete  liquidation  and  obtaining the signature of the Trustee in accordance
with the terms and conditions of this Agreement.

                                  ARTICLE VII

                                  THE DEPOSITOR

     Section 7.01. Liability of the Depositor.

     The Depositor shall be liable in accordance  herewith only to the extent of
the  respective  obligations  specifically  imposed upon and  undertaken  by the
Depositor herein.

     Section 7.02. Merger, Consolidation or Conversion of the Depositor.

     Subject to the following paragraph,  the Depositor will keep in full effect
its existence,  rights and franchises as a corporation or association  under the
laws of the jurisdiction of its incorporation, and each will obtain and preserve
its  qualification to do business as a foreign  corporation in each jurisdiction
in which such qualification is or shall be necessary to protect the validity and
enforceability  of  this  Agreement  and the  Certificates  and to  perform  its
respective duties under this Agreement.



                                       34
<PAGE>

     The Depositor  may be merged or  consolidated  with or into any Person,  or
transfer all or substantially all of its assets to any Person, in which case any
Person  resulting from any merger or  consolidation to which the Depositor shall
be a party,  or any Person  succeeding to the business of the Depositor shall be
the successor of the Depositor hereunder, without the execution or filing of any
paper or any  further  act on the part of any of the  parties  hereto,  anything
herein to the contrary notwithstanding.

     Section 7.03. Limitation on Liability of the Depositor and Others.

     (a) Neither the Depositor nor any of the directors,  officers, employees or
agents of the  Depositor  shall be under any  liability to the Trust Fund or the
Certificateholders for any action taken or for refraining from the taking of any
action in good faith  pursuant  to this  Agreement,  or for errors in  judgment;
provided,  however,  that this provision  shall not protect the Depositor or any
such person against any breach of warranties or representations  made herein, or
against  any  liability  which would  otherwise  be imposed by reason of willful
misfeasance,  bad faith or gross  negligence in the  performance of duties or by
reason of reckless  disregard of obligations or duties hereunder.  The Depositor
and any director,  officer,  employee or agent of the Depositor may rely in good
faith on any document of any kind which,  prima facie, is properly  executed and
submitted by any Person respecting any matters arising hereunder.  The Depositor
and  any  director,  officer,  employee  or  agent  of the  Depositor  shall  be
indemnified  and held harmless by the Trust Fund against any loss,  liability or
expense  incurred in connection with any legal action relating to this Agreement
or the  Certificates,  other than any loss,  liability  or expense  incurred  by
reason of willful misfeasance,  bad faith or gross negligence in the performance
of duties or by reason of reckless disregard of obligations or duties hereunder.
The  Depositor  shall not be under any  obligation  to appear in,  prosecute  or
defend any legal action unless such action is related to its  respective  duties
under this Agreement and which in its opinion does not involve it in any expense
or  liability;  provided,  however,  that the  Depositor  may in its  discretion
undertake any such action which it may deem  necessary or desirable with respect
to this  Agreement  and the  rights  and  duties of the  parties  hereto and the
interests of the Certificateholders  hereunder. In such event, and provided that
such action has been consented to by the Holders of Certificates  entitled to at
least 51% of the Voting Rights,  the legal expenses and costs of such action and
any liability  resulting  therefrom shall be expenses,  costs and liabilities of
the Trust Fund,  and the Depositor  shall be entitled to be reimbursed  therefor
from the Trust Certificate Account as provided in Section 3.04.

     (b) Neither the Trustee nor any of the  directors,  officers,  employees or
agents of the  Trustee  shall be under any  liability  to the Trust  Fund or the
Certificateholders for any action taken or for refraining from the taking of any
action in good faith  pursuant  to this  Agreement,  or for errors in  judgment;
provided, however, that this provision shall not protect the Trustee or any such
person  against any breach of  warranties  or  representations  made herein,  or
against  any  liability  which would  otherwise  be imposed by reason of willful
misfeasance,  bad faith or gross  negligence in the  performance of duties or by
reason of reckless disregard of obligations or duties hereunder. The Trustee and
any director,  officer,  employee or agent of the Trustee may rely in good faith
on any  document of any kind  which,  prima  facie,  is  properly  executed  and
submitted by any Person  respecting any matters arising  hereunder.  The Trustee
and any director,  officer, employee or agent of the Trustee will be indemnified
and held  harmless  by the Trust Fund  against  any loss,  liability  or expense
incurred in connection with any claim or legal action


                                       35
<PAGE>



or any pending or threatened claim or legal action relating to this Agreement or
the Trust  Certificates or any claim or legal actionor any pending or threatened
claim or legal action relating to the performance of the Trustee's  duties under
the Agreement,  other than any loss,  liability or expense incurred by reason of
willful misfeasance, bad faith or negligence in the performance of the Trustee's
duties under this Agreement or as a result of a breach, or by reason of reckless
disregard, of the Trustee's obligations and duties under this Agreement.

                                  ARTICLE VIII

                            MISCELLANEOUS PROVISIONS

     Section 8.01. Amendment.

     (a) This  Agreement  may be amended from time to time by the  Depositor and
the Trustee, without the consent of any of the Certificateholders:

     (i) to cure any ambiguity,

     (ii) to correct or supplement any provisions  herein or therein,  which may
          be  inconsistent  with any other  provisions  herein or  therein or to
          correct any error,

     (iii)to modify,  eliminate or add to any of its  provisions  to such extent
          as shall be necessary or  desirable to maintain the  qualification  of
          the  Trust  Fund as a REMIC  at all  times  that  any  Certificate  is
          outstanding  or to avoid or minimize the risk of the imposition of any
          tax on the  Trust  Fund  pursuant  to the Code  that  would be a claim
          against the Trust  Fund,  provided  that the  Trustee has  received an
          Opinion of Counsel to the effect that (A) such action is  necessary or
          desirable to maintain such  qualification  or to avoid or minimize the
          risk of the  imposition  of any such tax and (B) such  action will not
          adversely  affect  in  any  material  respect  the  interests  of  any
          Certificateholder,

     (iv) to  change  the  timing  and/or  nature  of  deposits  into the  Trust
          Certificate  Account,  provided  that (A) such  change  shall not,  as
          evidenced by an Opinion of Counsel,  adversely  affect in any material
          respect the  interests  of any  Certificateholder  and (B) such change
          shall  not   adversely   affect   the   then-current   rating  of  the
          Certificates,  as  evidenced  by a letter from the Rating  Agency then
          rating the Certificates to such effect,

     (v)  to modify,  eliminate or add to the  provisions of Section  4.02(g) or
          any  other  provision  hereof  restricting  transfer  of the  Class  R
          Certificate  by virtue of their being the REMIC  "residual  interest",
          provided  that (A) such  change  shall not  adversely  affect the then
          current ratings of the Certificates, as evidenced by a letter from the
          Rating  Agency to such  effect,  and (B) such  change  shall  not,  as
          evidenced by an Opinion of Counsel, cause either the Trust Fund or any
          of the Certificateholders (other than the transferor) to be subject to
          a tax caused by a transfer to a Non-United  States  Person or a Person
          that is not a Permitted Transferee, or

     (vi) to make any other  provisions  with  respect to  matters or  questions
          arising   under  this   Agreement   which  shall  not  be   materially
          inconsistent with the provisions of



                                       36
<PAGE>


     this  Agreement,  provided  that such action  shall not, as evidenced by an
     Opinion of Counsel,  adversely affect in any material respect the interests
     of any Certificateholder.

     (b) This  Agreement  may also be amended from time to time by the Depositor
and the Trustee with the consent of the Holders of  Certificates  evidencing  in
the  aggregate  not less than 66% of the  Percentage  Interests of each Class of
Certificates  affected  thereby for the purpose of adding any  provisions  to or
changing in any manner or eliminating any of the provisions of this Agreement or
of  modifying  in any manner the rights of the Holders of  Certificates  of such
Class; provided, however, that no such amendment shall:

     (i)  reduce in any manner  the amount of, or delay the timing of,  payments
          which are required to be  distributed on any  Certificate  without the
          consent of the Holder of such Certificate, or

     (ii) reduce  the  aforesaid  percentage  of  Certificates  of any Class the
          Holders of which are required to consent to any such amendment, in any
          such case  without the consent of the Holders of all  Certificates  of
          such Class then outstanding.

     (c) Notwithstanding  any contrary provision of this Agreement,  the Trustee
shall not consent to any amendment to this Agreement  unless it shall have first
received an Opinion of Counsel to the effect that such amendment or the exercise
of any power  granted to the  Depositor or the Trustee in  accordance  with such
amendment will not (subject to Section  5.01(b) hereof) result in the imposition
of a tax on the Trust Fund or cause the Trust Fund to fail to qualify as a REMIC
at any time that any Certificate is outstanding.

     (d) Promptly  after the  execution of any such  amendment the Trustee shall
furnish  written  notification  of the  substance  of  such  amendment  to  each
Certificateholder.   It   shall   not  be   necessary   for   the   consent   of
Certificateholders under this Section 8.01 to approve the particular form of any
proposed amendment, but it shall be sufficient if such consent shall approve the
substance  thereof.  The manner of obtaining such consents and of evidencing the
authorization of the execution thereof by Certificateholders shall be subject to
such reasonable regulations as the Trustee may prescribe.

     Section 8.02. Counterparts.

     For the purpose of facilitating the recordation of this Agreement as herein
provided and for other purposes,  this Agreement may be executed  simultaneously
in any number of counterparts,  each of which counterparts shall be deemed to be
an  original,  and  such  counterparts  shall  constitute  but one and the  same
instrument.

     Section 8.03. Limitation on Rights of Certificateholders.

     (a) The death or incapacity of any  Certificateholder  shall not operate to
terminate this Agreement or the Trust Fund, nor entitle such Certificateholder's
legal  representatives  or heirs to claim an accounting or to take any action or
proceeding  in any court for a partition  or winding up of the Trust  Fund,  nor
otherwise  affect the rights,  obligations and liabilities of the parties hereto
or any of them.




                                       37
<PAGE>

     (b) No Certificateholder  shall have any right to vote (except as expressly
provided  for  herein) or in any manner  otherwise  control  the  operation  and
management  of the Trust Fund, or the  obligations  of the parties  hereto,  nor
shall anything herein set forth, or contained in the terms of the  Certificates,
be construed so as to  constitute  the  Certificateholders  from time to time as
partners or members of an association;  nor shall any Certificateholder be under
any liability to any third party by reason of any action taken by the parties to
this Agreement pursuant to any provision hereof.

     (c) No Certificateholder shall have any right by virtue of any provision of
this  Agreement to institute any suit,  action or proceeding in equity or at law
upon or under or with respect to this Agreement,  unless such Holder  previously
shall have given to the  Trustee a notice of a default by the  Depositor  or the
Trustee in the performance of any obligation  hereunder,  and of the continuance
thereof, as hereinbefore  provided,  and unless also the Holders of Certificates
entitled to at least 33% of the Voting  Rights shall have made  written  request
upon the Trustee to institute such action, suit or proceeding in its own name as
Trustee  hereunder  and  shall  have  offered  to the  Trustee  such  reasonable
indemnity as it may require  against the costs,  expenses and  liabilities to be
incurred therein or thereby,  and the Trustee,  for 60 days after its receipt of
such notice, request and offer of indemnity,  shall have neglected or refused to
institute  any  such  action,  suit  or  proceeding.   For  the  protection  and
enforcement of the provisions of this Section, each and every  Certificateholder
and the Trustee  shall be entitled to such relief as can be given  either at law
or in equity.

     Section 8.04. Governing Law.

     This Agreement and the  Certificates  shall be construed in accordance with
the laws of the State of __________ and the obligations,  rights and remedies of
the parties hereunder shall be determined in accordance with such laws.

     Section 8.05. Notices.

     All demands and notices  hereunder  shall be in writing and shall be deemed
to have been duly given if personally delivered at or mailed by registered mail,
postage prepaid (except for notices to the Trustee which shall be deemed to have
been duly given only when  received),  to (a) in the case of the  Depositor,  11
Madison  Avenue,  New York, New York 10010,  Attention:  Principal  Transactions
Group,  or such other  address as may  hereafter  be furnished to the Trustee in
writing by the Depositor, (b) in the case of the Trustee, _____________________,
____________________,  ____________________,  Attention: ____________________ or
such other  address as may hereafter be furnished to the Depositor in writing by
the Trustee, with a copy to ________________, ________________, _______________,
Attention:   ___________,   and   (c)   in  the   case   of   [Rating   Agency],
__________________,  ______________,  Attention:  ______________  or such  other
address as may  hereafter  be  furnished  to the  Depositor  and the  Trustee in
writing by [Rating  Agency].  Any notice required or permitted to be mailed to a
Certificateholder  shall be given by first-class mail,  postage prepaid,  at the
address  of such  holder as shown in the  Certificate  Register.  Any  notice so
mailed  within  the time  prescribed  in this  Agreement  shall be  conclusively
presumed to have been duly given, whether or not the Certificateholder  receives
such notice.



                                       38
<PAGE>

     Section 8.06. Notices to the Rating Agency.

     The Depositor or the Trustee, as applicable, shall notify the Rating
Agency at such time as it is otherwise  required  pursuant to this  Agreement to
give notice of the  occurrence  of any of the events  described  in clauses (a),
(b),  (d), (e) or (f) below or provide a copy to the Rating  Agency at such time
as otherwise  required to be delivered  pursuant to this Agreement of any of the
statements described in clauses (c) below:

     (a) a material change or amendment to this Agreement,

     (b) the  termination or  appointment of a successor  Trustee or a change in
the majority ownership of the Trustee,

     (c) the statement  required to be delivered to the Holders of each Class of
Certificates pursuant to Section 3.06,

     (d) a change in the location of the Trust Certificate Account,

     (e) the occurrence of the Final Distribution Date, and

     (f) the repurchase of any Underlying Certificate.

     Section 8.07. Severability of Provisions.

     If any one or more of the  covenants,  agreements,  provisions  or terms of
this  Agreement  shall be for any  reason  whatsoever  held  invalid,  then such
covenants,  agreements,  provisions or terms shall be deemed  severable from the
remaining covenants, agreements, provisions or terms of this Agreement and shall
in no way affect the validity or  enforceability of the other provisions of this
Agreement or of the Certificates or the rights of the Holders thereof.

     Section 8.08. Successors and Assigns.

     The  provisions  of this  Agreement  shall be binding upon and inure to the
benefit of the respective  successors and assigns of the parties hereto, and all
such provisions shall inure to the benefit of the Certificateholders.

     Section 8.09. Article and Section Headings.

     The article and section  headings  herein are for  convenience of reference
only, and shall not limit or otherwise affect the meaning hereof.



                                       39
<PAGE>

     IN WITNESS  WHEREOF,  the Depositor and the Trustee have caused their names
to be signed hereto by their respective  officers  thereunto duly authorized and
their respective seals, if required,  duly attested, to be hereunto affixed, all
as of the day and year first above written.

                               CREDIT SUISSE FIRST BOSTON MORTGAGE
                               SECURITIES CORP.




                               By:________________________________
                                  Name:
                                  Title:


                               ___________________________________
                               as Trustee




                               By:________________________________
                                  Name:
                                  Title:




                                       40
<PAGE>

                                    EXHIBIT A

                           FORM OF CLASS A CERTIFICATE

THIS  CERTIFICATE  HAS NOT BEEN AND WILL NOT BE REGISTERED  UNDER THE SECURITIES
ACT OF 1933, AS AMENDED (THE "ACT"), OR THE SECURITIES LAWS OF ANY STATE AND MAY
NOT BE RESOLD OR  TRANSFERRED  UNLESS IT IS REGISTERED  PURSUANT TO SUCH ACT AND
LAWS  OR  IS  SOLD  OR  TRANSFERRED  IN  TRANSACTIONS   WHICH  ARE  EXEMPT  FROM
REGISTRATION UNDER SUCH ACT AND UNDER APPLICABLE STATE LAW AND IS TRANSFERRED IN
ACCORDANCE WITH THE PROVISIONS OF SECTION 4.02 OF THE TRUST  AGREEMENT  REFERRED
TO HEREIN.  THIS  CERTIFICATE  MAY BE SOLD TO "QUALIFIED  INSTITUTIONAL  BUYERS"
PURSUANT  TO RULE  144A  UNDER THE ACT AND,  IN  CERTAIN  LIMITED  CIRCUMSTANCES
DESCRIBED IN THE TRUST AGREEMENT,  TO A LIMITED NUMBER OF ACCREDITED  INVESTORS.
THIS CERTIFICATE IS ALSO SUBJECT TO CERTAIN RESTRICTIONS ON TRANSFER TO EMPLOYEE
BENEFIT PLANS AND OTHER ARRANGEMENTS  SUBJECT TO THE EMPLOYEE  RETIREMENT INCOME
SECURITY ACT OF 1974, AS AMENDED,  OR SECTION 4975 OF THE INTERNAL  REVENUE CODE
OF 1986.

[SOLELY FOR U.S.  FEDERAL  INCOME TAX PURPOSES,  THIS  CERTIFICATE IS A "REGULAR
INTEREST" IN A "REAL  ESTATE  MORTGAGE  INVESTMENT  CONDUIT," AS THOSE TERMS ARE
DEFINED, RESPECTIVELY, IN SECTIONS 860G AND 860D OF THE INTERNAL REVENUE CODE OF
1986. THE FOLLOWING  INFORMATION IS PROVIDED SOLELY FOR THE PURPOSES OF APPLYING
THE U.S.  FEDERAL  INCOME TAX  ORIGINAL  ISSUE  DISCOUNT  ("OID")  RULES TO THIS
CERTIFICATE.  THE ISSUE DATE OF THIS  CERTIFICATE IS _________,  200_.  ASSUMING
THAT THE MORTGAGE LOANS PREPAY AT THE PREPAYMENT  ASSUMPTION,  THIS  CERTIFICATE
HAS BEEN ISSUED WITH NO MORE THAN $____ OF OID PER $1,000 OF INITIAL CERTIFICATE
PRINCIPAL  BALANCE,  THE  YIELD TO  MATURITY  IS  ____%  AND THE  AMOUNT  OF OID
ATTRIBUTABLE  TO THE INITIAL  ACCRUAL PERIOD IS NO MORE THAN $____ PER $1,000 OF
INITIAL CERTIFICATE PRINCIPAL BALANCE, COMPUTED USING THE APPROXIMATE METHOD. NO
REPRESENTATION  IS MADE THAT THE  MORTGAGE  LOANS WILL PREPAY AT A RATE BASED ON
THE PREPAYMENT ASSUMPTION OR AT ANY OTHER RATE.]

UNLESS THIS  CERTIFICATE  IS PRESENTED BY AN  AUTHORIZED  REPRESENTATIVE  OF THE
DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), TO ISSUER OR ITS AGENT
FOR REGISTRATION OF TRANSFER,  EXCHANGE,  OR PAYMENT, AND ANY CERTIFICATE ISSUED
IS  REGISTERED IN THE NAME OF [CEDE & CO.] OR IN SUCH OTHER NAME AS IS REQUESTED
BY AN AUTHORIZED  REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO [CEDE & CO.]
OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC),
ANY  TRANSFER,  PLEDGE,  OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY
PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, [CEDE & CO.], HAS AN
INTEREST HEREIN.



                                      A-1
<PAGE>

Certificate No.                                                    CUSIP:


             Class A              Weighted Average Pass-Through Rate
____________________________     _____________________________________


Date of Trust Agreement                 Aggregate Initial Certificate
_________, 200_                         Principal Balance of Class A
                                        Certificates:  $____________


Initial Payment Date:  _________,       Initial Certificate Principal
200_                                    Balance of this Certificate:
                                        $_____________

                               TRUST CERTIFICATE,

                                 Series 200_-__

     evidencing  a  percentage  interest in any  distributions  allocable to the
     Class A  Certificates  with  respect  to the Trust Fund  consisting  of the
     Underlying  Certificates  formed  and sold by Credit  Suisse  First  Boston
     Mortgage Securities Corp.

     This  Certificate  is payable solely from the assets of the Trust Fund, and
does not  represent an  obligation  of or interest in Credit Suisse First Boston
Mortgage  Securities  Corp.,  the  Trustee  referred  to  below  or any of their
affiliates.  Neither  this  Certificate  nor  the  Underlying  Certificates  are
guaranteed or insured by any governmental agency or instrumentality or by Credit
Suisse First Boston  Mortgage  Securities  Corp.  or the Trustee or any of their
affiliates.

     This certifies that [Cede & Co.] is the registered  owner of the Percentage
Interest  evidenced  by this  Certificate  (obtained  by  dividing  the  initial
Certificate  Principal  Balance of this  Certificate  by the  aggregate  initial
Certificate  Principal  Balance of all Class A  Certificates,  both as specified
above)  in  certain  distributions  with  respect  to a  Trust  Fund  consisting
primarily of a pool of the  Underlying  Certificates,  formed and sold by Credit
Suisse  First  Boston  Mortgage   Securities  Corp.   (hereinafter   called  the
"Depositor",  which term  includes  any  successor  entity  under the  Agreement
referred  to below).  The Trust Fund was created  pursuant to a Trust  Agreement
dated  as  specified   above  (the   "Agreement")   among  the   Depositor   and
__________________,  as  trustee  (the  "Trustee"),  a summary of certain of the
pertinent provisions of which is set forth hereafter.  To the extent not defined
herein,  the  capitalized  terms used herein have the  meanings  assigned in the
Agreement.  This  Certificate  is issued  under  and is  subject  to the  terms,
provisions  and conditions of the  Agreement,  to which  Agreement the Holder of
this  Certificate by virtue of the  acceptance  hereof assents and by which such
Holder is bound.

     Pursuant to the terms of the Agreement,  a distribution will be made on the
date (the  "Payment  Date")  which is the later of (a) the second  Business  Day
following the latest related  Distribution  Date on the Underlying  Certificates
and (b) the date on which both the  distribution  with  respect to each  related
Underlying  Certificate  and the related  Distribution  Date Statement have been
received by the Trustee, but no later than five Business Days following the



                                      A-2
<PAGE>

date set forth in clause (a)  (provided  that the initial  Payment Date shall be
_________,  200_), to the Person in whose name this Certificate is registered at
the close of  business  on the last day (or if such  last day is not a  Business
Day,  the  Business  Day  immediately  preceding  such  last  day) of the  month
preceding  the month of the latest  related  Distribution  Date for the  related
Underlying  Certificates  or, under certain  circumstances,  the preceding month
(the "Record Date"),  from the Available Funds in an amount equal to the product
of the Percentage Interest evidenced by this Certificate and the amount required
to be distributed to Holders of  Certificates  of this Class of  Certificates on
such Payment Date.

     Distributions   on  this  Certificate  will  be  made  by  the  Trustee  in
immediately  available  funds (by wire transfer or otherwise) for the account of
the Person  entitled  thereto  except as otherwise  provided in the Agreement if
such  Person  shall have so  notified  the  Trustee,  or by check  mailed to the
address of the Person entitled thereto, as such name and address shall appear on
the Certificate Register.

     Notwithstanding  the above, the final distribution on this Certificate will
be made  after due notice of the  pendency  of such  distribution  and only upon
presentation and surrender of this Certificate at the office or agency appointed
by the Trustee for that  purpose in the City and State of New York.  The initial
aggregate Certificate Principal Balance of the Class A Certificates is set forth
above. The Certificate Principal Balance hereof will be reduced to the extent of
the  distributions  allocable to principal and as further set forth in the Trust
Agreement.

     No transfer of a  Certificate  will be made unless such  transfer is exempt
from or is made in accordance with the registration  requirements of the Act and
any applicable state securities laws. In the event that such a transfer is to be
made without such  registration or  qualification,  (i) if this Certificate is a
Definitive  Certificate,  the  Depositor  and  the  Trustee  shall  require  the
transferee to execute an investment letter in substantially the form attached as
either Exhibit F or Exhibit H to the Trust Agreement,  which  investment  letter
shall not be an expense of the  Depositor  or the  Trustee and (ii) in the event
that  such a  transfer  is not made  pursuant  to Rule 144A  under the Act,  the
Depositor shall require an Opinion of Counsel satisfactory to the Depositor that
such  transfer may be made without such  registration  or  qualification,  which
Opinion of Counsel  shall not be an expense  of the  Depositor  or the  Trustee.
Neither the Depositor nor the Trustee will  register the  Certificate  under the
Act,  qualify  this  Certificate  under  any  state  securities  law or  provide
registration  rights to any purchaser.  Any such holder  desiring to effect such
transfer  shall,  and does  hereby  agree  to,  indemnify  the  Trustee  and the
Depositor against any liability that may result if the transfer is not so exempt
or is not made in accordance with such federal and state laws.

     In connection  with any transfer of a Definitive  Certificate,  the Trustee
will require (i) a representation, in the form set forth in Exhibit F or Exhibit
H, stating that the  transferee  is not, and is not  purchasing on behalf of, or
with "plan assets" of an employee benefit plan or other  arrangement  subject to
the  fiduciary  responsibility  provisions  of the  Employee  Retirement  Income
Security Act of 1974,  as amended  ("ERISA"),  or is an insurance  company whose
purchase  satisfies  certain  conditions set forth in the Agreement,  or (ii) an
opinion of counsel  acceptable to and in form and substance  satisfactory to the
Trustee and the Depositor  with respect to the  permissibility  of such transfer
under ERISA and stating,  among other things, that the transferee's  acquisition
of this Certificate will not constitute or result in a non-exempt




                                      A-3
<PAGE>

"prohibited  transaction"  within the  meaning  of ERISA or Section  4975 of the
Internal Revenue Code of 1986.

     This Certificate is one of a duly authorized  issue of Certificates  issued
in several  Classes  designated as Trust  Certificates  of the Series  specified
hereon (herein  collectively  called the  "Certificates").  The Certificates are
limited in right of payment to certain collections and recoveries respecting the
Underlying  Certificates,  all as more  specifically set forth herein and in the
Agreement.

     As  provided  in the  Agreement,  withdrawals  from the  Trust  Certificate
Account created for the benefit of Certificateholders may be made by the Trustee
from time to time for purposes other than  distributions to  Certificateholders,
such purposes  including without  limitation  reimbursement to the Depositor and
the Trustee of advances made, or certain expenses incurred, by either of them.

     The  Agreement  permits,  with certain  exceptions  therein  provided,  the
amendment of the Agreement and the modification of the rights and obligations of
the Depositor and the Trustee and the rights of the Certificateholders under the
Agreement at any time by the  Depositor  and the Trustee with the consent of the
Holders of  Certificates  evidencing  in the  aggregate not less than 66% of the
Percentage  Interests of each Class of Certificates  affected thereby.  Any such
consent by the Holder of this  Certificate  shall be  conclusive  and binding on
such  Holder  and  upon  all  future  holders  of  this  Certificate  and of any
Certificate  issued upon the transfer  hereof or in exchange  herefor or in lieu
hereof whether or not notation of such consent is made upon the Certificate. The
Agreement also permits the amendment  thereof in certain  circumstances  without
the consent of the Holders of any of the Certificates.

     As provided in the Agreement and subject to certain limitations therein set
forth,  the  transfer of this  Certificate  is  registrable  in the  Certificate
Register upon surrender of this  Certificate for registration of transfer at the
offices or agencies  appointed by the Trustee in the City and State of New York,
duly  endorsed by, or  accompanied  by an  assignment in the form below or other
written  instrument  of  transfer  in form  satisfactory  to the Trustee and the
Certificate  Registrar  duly  executed  by, the Holder  hereof or such  Holder's
attorney duly authorized in writing,  and thereupon one or more new Certificates
of authorized  denominations  evidencing the same Class and aggregate Percentage
Interest will be issued to the designated transferee or transferees.

     The  Certificates  are issuable  only as  registered  Certificates  without
coupons in Classes and in denominations  specified in the Agreement. As provided
in  the  Agreement  and  subject  to  certain  limitations  therein  set  forth,
Certificates are  exchangeable for new Certificates of authorized  denominations
evidencing the same Class and aggregate Percentage Interest, as requested by the
Holder surrendering the same.

     No service  charge  will be made for any such  registration  of transfer or
exchange,  but the Trustee may require  payment of a sum sufficient to cover any
tax or other governmental charge payable in connection therewith.




                                      A-4
<PAGE>

     The Depositor,  the Trustee and the Certificate  Registrar and any agent of
the Depositor,  the Trustee or the Certificate Registrar may treat the Person in
whose name this  Certificate is registered as the owner hereof for all purposes,
and neither the  Depositor,  the Trustee nor any such agent shall be affected by
notice to the contrary.

     This Certificate  shall be governed by and construed in accordance with the
laws of the State of __________.

     The obligations created by the Agreement in respect of the Certificates and
the  Trust  Fund  created   thereby   shall   terminate   upon  the  payment  to
Certificateholders  of all  amounts  held by or on  behalf  of the  Trustee  and
required to be paid to them pursuant to the Agreement  following  receipt of the
final  distribution to be made on the last remaining  Underlying  Certificate in
the Trust Fund upon presentation and surrender of such Underlying Certificate in
accordance with the terms and conditions of the related Underlying Agreement.



                                      A-5
<PAGE>




     IN WITNESS  WHEREOF,  the Trustee has caused  this  Certificate  to be duly
executed.



                               ________________________, as Trustee




                               By:______________________________
                                  Authorized Signatory


     This is one of the Trust Certificates  referred to in the  within-mentioned
Agreement.



                               ___________________________,
                               as Certificate Registrar




                               By:_________________________________
                                  Authorized Signatory



                                      A-6
<PAGE>


                                   ASSIGNMENT

     FOR  VALUE  RECEIVED,   the  undersigned  hereby  sell(s),   assign(s)  and
transfer(s)       unto__________________________________________________________
________________________________________________________________________________
_______________________________________________________    (Please    print   or
typewrite name and address including postal zip code of assignee) the beneficial
interest  evidenced by the within Trust  Certificate  and hereby  authorizes the
transfer  of  registration  of such  interest  to  assignee  on the  Certificate
Register of the Trust Fund.

     I (We) further direct the Certificate  Registrar to issue a new Certificate
of a like  denomination  and Class, to the above named assignee and deliver such
Certificate to the following address:



_______________________________________________________________________________
Dated:


                                    ___________________________________________
                                    Signature by or on behalf of assignor



                                    ___________________________________________
                                    Signature Guaranteed



                            DISTRIBUTION INSTRUCTIONS

     The assignee should include the following for purposes of distribution:

     Distributions shall be made, by wire transfer or otherwise,  in immediately
available funds to  _______________________________________________________  for
the   account  of   _________________________________________   account   number
_____________________________________________,   or,  if  mailed  by  check,  to
_______________________________.  Applicable  statements  should  be  mailed  to
________________________________________________________________________.

     This information is provided by ____________________________________,

the assignee named above, or _________________________________, as its agent.





                                      A-7
<PAGE>

                                    EXHIBIT B

                           FORM OF CLASS M CERTIFICATE

THIS  CERTIFICATE IS SUBORDINATED IN RIGHT OF PAYMENT TO THE CLASS A, CLASS [M1]
[M2] CERTIFICATES AS DESCRIBED IN THE TRUST AGREEMENT REFERRED TO HEREIN.

THIS  CERTIFICATE  HAS NOT BEEN AND WILL NOT BE REGISTERED  UNDER THE SECURITIES
ACT OF 1933, AS AMENDED (THE "ACT"), OR THE SECURITIES LAWS OF ANY STATE AND MAY
NOT BE RESOLD OR  TRANSFERRED  UNLESS IT IS REGISTERED  PURSUANT TO SUCH ACT AND
LAWS  OR  IS  SOLD  OR  TRANSFERRED  IN  TRANSACTIONS   WHICH  ARE  EXEMPT  FROM
REGISTRATION UNDER SUCH ACT AND UNDER APPLICABLE STATE LAW AND IS TRANSFERRED IN
ACCORDANCE WITH THE PROVISIONS OF SECTION 4.02 OF THE TRUST  AGREEMENT  REFERRED
TO HEREIN.  THIS  CERTIFICATE  MAY BE SOLD TO "QUALIFIED  INSTITUTIONAL  BUYERS"
PURSUANT  TO RULE  144A  UNDER THE ACT AND,  IN  CERTAIN  LIMITED  CIRCUMSTANCES
DESCRIBED IN THE TRUST AGREEMENT,  TO A LIMITED NUMBER OF ACCREDITED  INVESTORS.
THIS CERTIFICATE IS ALSO SUBJECT TO CERTAIN RESTRICTIONS ON TRANSFER TO EMPLOYEE
BENEFIT PLANS AND OTHER ARRANGEMENTS  SUBJECT TO THE EMPLOYEE  RETIREMENT INCOME
SECURITY ACT OF 1974, AS AMENDED,  OR SECTION 4975 OF THE INTERNAL  REVENUE CODE
OF 1986.

[SOLELY FOR U.S.  FEDERAL  INCOME TAX PURPOSES,  THIS  CERTIFICATE IS A "REGULAR
INTEREST" IN A "REAL  ESTATE  MORTGAGE  INVESTMENT  CONDUIT," AS THOSE TERMS ARE
DEFINED, RESPECTIVELY, IN SECTIONS 860G AND 860D OF THE INTERNAL REVENUE CODE OF
1986. THE FOLLOWING  INFORMATION IS PROVIDED SOLELY FOR THE PURPOSES OF APPLYING
THE U.S.  FEDERAL  INCOME TAX  ORIGINAL  ISSUE  DISCOUNT  ("OID")  RULES TO THIS
CERTIFICATE.  THE ISSUE DATE OF THIS  CERTIFICATE IS _________,  200_.  ASSUMING
THAT THE MORTGAGE LOANS PREPAY AT THE PREPAYMENT  ASSUMPTION,  THIS  CERTIFICATE
HAS BEEN ISSUED WITH NO MORE THAN $____ OF OID PER $1,000 OF INITIAL CERTIFICATE
PRINCIPAL  BALANCE,  THE  YIELD TO  MATURITY  IS  ____%  AND THE  AMOUNT  OF OID
ATTRIBUTABLE  TO THE INITIAL  ACCRUAL PERIOD IS NO MORE THAN $____ PER $1,000 OF
INITIAL CERTIFICATE PRINCIPAL BALANCE, COMPUTED USING THE APPROXIMATE METHOD. NO
REPRESENTATION  IS MADE THAT THE  MORTGAGE  LOANS WILL PREPAY AT A RATE BASED ON
THE PREPAYMENT ASSUMPTION OR AT ANY OTHER RATE.]

UNLESS THIS  CERTIFICATE  IS PRESENTED BY AN  AUTHORIZED  REPRESENTATIVE  OF THE
DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), TO ISSUER OR ITS AGENT
FOR REGISTRATION OF TRANSFER,  EXCHANGE,  OR PAYMENT, AND ANY CERTIFICATE ISSUED
IS  REGISTERED IN THE NAME OF [CEDE & CO.] OR IN SUCH OTHER NAME AS IS REQUESTED
BY AN AUTHORIZED  REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO [CEDE & CO.]
OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE




                                      B-1
<PAGE>



OF DTC), ANY TRANSFER,  PLEDGE, OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR
TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, [CEDE & CO.],
HAS AN INTEREST HEREIN.






                                      B-2
<PAGE>



Certificate No.                                            CUSIP:


            Class M_                  Weighted Average Pass-Through Rate
_________________________________    _________________________________________


Date of Trust Agreement             Aggregate Initial Certificate
_________, 200_                     Principal Balance of Class M_
                                    Certificates: $_______________


Initial Payment Date:  _________,   Initial Certificate Principal
200_                                Balance of this Certificate:$______________


                               TRUST CERTIFICATE,

                                 Series 200_-__

     evidencing  a  percentage  interest in any  distributions  allocable to the
     Class M_  Certificates  with  respect to the Trust Fund  consisting  of the
     Underlying  Certificates  formed  and sold by Credit  Suisse  First  Boston
     Mortgage Securities Corp.

     This  Certificate  is payable solely from the assets of the Trust Fund, and
does not  represent an  obligation  of or interest in Credit Suisse First Boston
Mortgage  Securities  Corp.,  the  Trustee  referred  to  below  or any of their
affiliates.  Neither  this  Certificate  nor  the  Underlying  Certificates  are
guaranteed or insured by any governmental agency or instrumentality or by Credit
Suisse First Boston  Mortgage  Securities  Corp.  or the Trustee or any of their
affiliates.

     This certifies that [Cede & Co.] is the registered  owner of the Percentage
Interest  evidenced  by this  Certificate  (obtained  by  dividing  the  initial
Certificate  Principal  Balance of this  Certificate  by the  aggregate  initial
Certificate  Principal  Balance of all Class M_ Certificates,  both as specified
above)  in  certain  distributions  with  respect  to a  Trust  Fund  consisting
primarily of a pool of the  Underlying  Certificates,  formed and sold by Credit
Suisse  First  Boston  Mortgage   Securities  Corp.   (hereinafter   called  the
"Depositor",  which term  includes  any  successor  entity  under the  Agreement
referred  to below).  The Trust Fund was created  pursuant to a Trust  Agreement
dated  as  specified   above  (the   "Agreement")   among  the   Depositor   and
______________________,  as trustee (the "Trustee"), a summary of certain of the
pertinent provisions of which is set forth hereafter.  To the extent not defined
herein,  the  capitalized  terms used herein have the  meanings  assigned in the
Agreement.  This  Certificate  is issued  under  and is  subject  to the  terms,
provisions  and conditions of the  Agreement,  to which  Agreement the Holder of
this  Certificate by virtue of the  acceptance  hereof assents and by which such
Holder is bound.

     Pursuant to the terms of the Agreement,  a distribution will be made on the
date (the  "Payment  Date")  which is the later of (a) the second  Business  Day
following the latest related  Distribution  Date on the Underlying  Certificates
and (b) the date on which both the  distribution  with  respect to each  related
Underlying  Certificate  and the related  Distribution  Date Statement have been
received by the Trustee, but no later than five Business Days following the



                                      B-3
<PAGE>


date set forth in clause (a)  (provided  that the initial  Payment Date shall be
_________,  200_), to the Person in whose name this Certificate is registered at
the close of  business  on the last day (or if such  last day is not a  Business
Day,  the  Business  Day  immediately  preceding  such  last  day) of the  month
preceding  the month of the latest  related  Distribution  Date for the  related
Underlying  Certificates  or, under certain  circumstances,  the preceding month
(the "Record Date"),  from the Available Funds in an amount equal to the product
of the Percentage Interest evidenced by this Certificate and the amount required
to be distributed to Holders of  Certificates  of this Class of  Certificates on
such Payment Date.

     Distributions   on  this  Certificate  will  be  made  by  the  Trustee  in
immediately  available  funds (by wire transfer or otherwise) for the account of
the Person  entitled  thereto  except as otherwise  provided in the Agreement if
such  Person  shall have so  notified  the  Trustee,  or by check  mailed to the
address of the Person entitled thereto, as such name and address shall appear on
the Certificate Register.

     Notwithstanding  the above, the final distribution on this Certificate will
be made  after due notice of the  pendency  of such  distribution  and only upon
presentation and surrender of this Certificate at the office or agency appointed
by the Trustee for that  purpose in the City and State of New York.  The initial
aggregate  Certificate  Principal  Balance of the Class M_  Certificates  is set
forth above.  The  Certificate  Principal  Balance hereof will be reduced to the
extent of the  distributions  allocable to principal and as further set forth in
the Trust Agreement.

     No transfer of a  Certificate  will be made unless such  transfer is exempt
from or is made in accordance with the registration  requirements of the Act and
any applicable state securities laws. In the event that such a transfer is to be
made without such  registration or  qualification,  (i) if this Certificate is a
Definitive  Certificate,  the  Depositor  and  the  Trustee  shall  require  the
transferee to execute an investment letter in substantially the form attached as
either Exhibit F or Exhibit H to the Trust Agreement,  which  investment  letter
shall not be an expense of the  Depositor  or the  Trustee and (ii) in the event
that  such a  transfer  is not made  pursuant  to Rule 144A  under the Act,  the
Depositor shall require an Opinion of Counsel satisfactory to the Depositor that
such  transfer may be made without such  registration  or  qualification,  which
Opinion of Counsel  shall not be an expense  of the  Depositor  or the  Trustee.
Neither the Depositor nor the Trustee will  register the  Certificate  under the
Act,  qualify  this  Certificate  under  any  state  securities  law or  provide
registration  rights to any purchaser.  Any such holder  desiring to effect such
transfer  shall,  and does  hereby  agree  to,  indemnify  the  Trustee  and the
Depositor against any liability that may result if the transfer is not so exempt
or is not made in accordance with such federal and state laws.

     In connection  with any transfer of a Definitive  Certificate,  the Trustee
will require (i) a representation, in the form set forth in Exhibit F or Exhibit
H, stating that the  transferee  is not, and is not  purchasing on behalf of, or
with "plan assets" of an employee benefit plan or other  arrangement  subject to
the  fiduciary  responsibility  provisions  of the  Employee  Retirement  Income
Security Act of 1974,  as amended  ("ERISA"),  or is an insurance  company whose
purchase  satisfies  certain  conditions set forth in the Agreement,  or (ii) an
opinion of counsel  acceptable to and in form and substance  satisfactory to the
Trustee and the Depositor  with respect to the  permissibility  of such transfer
under ERISA and stating,  among other things, that the transferee's  acquisition
of this Certificate will not constitute or result in a non-exempt




                                      B-4
<PAGE>

"prohibited  transaction"  within the  meaning  of ERISA or Section  4975 of the
Internal Revenue Code of 1986.

     This Certificate is one of a duly authorized  issue of Certificates  issued
in several  Classes  designated as Trust  Certificates  of the Series  specified
hereon (herein  collectively  called the  "Certificates").  The Certificates are
limited in right of payment to certain collections and recoveries respecting the
Underlying  Certificates,  all as more  specifically set forth herein and in the
Agreement.

     As  provided  in the  Agreement,  withdrawals  from the  Trust  Certificate
Account created for the benefit of Certificateholders may be made by the Trustee
from time to time for purposes other than  distributions to  Certificateholders,
such purposes  including without  limitation  reimbursement to the Depositor and
the Trustee of advances made, or certain expenses incurred, by either of them.

     The  Agreement  permits,  with certain  exceptions  therein  provided,  the
amendment of the Agreement and the modification of the rights and obligations of
the Depositor and the Trustee and the rights of the Certificateholders under the
Agreement at any time by the  Depositor  and the Trustee with the consent of the
Holders of  Certificates  evidencing  in the  aggregate not less than 66% of the
Percentage  Interests of each Class of Certificates  affected thereby.  Any such
consent by the Holder of this  Certificate  shall be  conclusive  and binding on
such  Holder  and  upon  all  future  holders  of  this  Certificate  and of any
Certificate  issued upon the transfer  hereof or in exchange  herefor or in lieu
hereof whether or not notation of such consent is made upon the Certificate. The
Agreement also permits the amendment  thereof in certain  circumstances  without
the consent of the Holders of any of the Certificates.

     As provided in the Agreement and subject to certain limitations therein set
forth,  the  transfer of this  Certificate  is  registrable  in the  Certificate
Register upon surrender of this  Certificate for registration of transfer at the
offices or agencies  appointed by the Trustee in the City and State of New York,
duly  endorsed by, or  accompanied  by an  assignment in the form below or other
written  instrument  of  transfer  in form  satisfactory  to the Trustee and the
Certificate  Registrar  duly  executed  by, the Holder  hereof or such  Holder's
attorney duly authorized in writing,  and thereupon one or more new Certificates
of authorized  denominations  evidencing the same Class and aggregate Percentage
Interest will be issued to the designated transferee or transferees.

     The  Certificates  are issuable  only as  registered  Certificates  without
coupons in Classes and in denominations  specified in the Agreement. As provided
in  the  Agreement  and  subject  to  certain  limitations  therein  set  forth,
Certificates are  exchangeable for new Certificates of authorized  denominations
evidencing the same Class and aggregate Percentage Interest, as requested by the
Holder surrendering the same.

     No service  charge  will be made for any such  registration  of transfer or
exchange,  but the Trustee may require  payment of a sum sufficient to cover any
tax or other governmental charge payable in connection therewith.




                                      B-5
<PAGE>

     The Depositor,  the Trustee and the Certificate  Registrar and any agent of
the Depositor,  the Trustee or the Certificate Registrar may treat the Person in
whose name this  Certificate is registered as the owner hereof for all purposes,
and neither the  Depositor,  the Trustee nor any such agent shall be affected by
notice to the contrary.

     This Certificate  shall be governed by and construed in accordance with the
laws of the State of _________.

     The obligations created by the Agreement in respect of the Certificates and
the  Trust  Fund  created   thereby   shall   terminate   upon  the  payment  to
Certificateholders  of all  amounts  held by or on  behalf  of the  Trustee  and
required to be paid to them pursuant to the Agreement  following  receipt of the
final  distribution to be made on the last remaining  Underlying  Certificate in
the Trust Fund upon presentation and surrender of such Underlying Certificate in
accordance with the terms and conditions of the related Underlying Agreement.



                                      B-6
<PAGE>




     IN WITNESS  WHEREOF,  the Trustee has caused  this  Certificate  to be duly
executed.



                               ______________________, as Trustee




                               By:___________________________________
                                  Authorized Signatory


     This is one of the Trust Certificates  referred to in the  within-mentioned
Agreement.



                               ___________________________,
                               as Certificate Registrar




                               By:_________________________________
                                  Authorized Signatory





                                      B-7
<PAGE>


                                   ASSIGNMENT

     FOR  VALUE  RECEIVED,   the  undersigned  hereby  sell(s),   assign(s)  and
transfer(s)        unto         ________________________________________________
_______________________________________________________________________________
_____________________________  (Please  print  or  typewrite  name  and  address
including postal zip code of assignee) the beneficial  interest evidenced by the
within Trust  Certificate and hereby  authorizes the transfer of registration of
such interest to assignee on the Certificate Register of the Trust Fund.

     I (We) further direct the Certificate  Registrar to issue a new Certificate
of a like  denomination  and Class, to the above named assignee and deliver such
Certificate to the following address:
________________________________________________________________________________

Dated:


                                    _______________________________________
                                    Signature by or on behalf of assignor


                                    _______________________________________
                                    Signature Guaranteed



                            DISTRIBUTION INSTRUCTIONS

     The assignee should include the following for purposes of distribution:

     Distributions shall be made, by wire transfer or otherwise,  in immediately
available funds to  ___________________________________________________  for the
account of __________________________________ account number __________________,
or, if mailed by check, to ___________________.  Applicable statements should be
mailed to ________________________________________.

     This information is provided by ________________________________________,

the assignee named above, or  ________________________________________  , as its
agent.



                                      B-8
<PAGE>



                                    EXHIBIT C

                           FORM OF CLASS B CERTIFICATE

THIS  CERTIFICATE IS  SUBORDINATED IN RIGHT OF PAYMENT TO THE CLASS A, CLASS M1,
CLASS M2 AND CLASS M3 CERTIFICATES AS DESCRIBED IN THE TRUST AGREEMENT  REFERRED
TO HEREIN.

THIS  CERTIFICATE  HAS NOT BEEN AND WILL NOT BE REGISTERED  UNDER THE SECURITIES
ACT OF 1933, AS AMENDED (THE "ACT"), OR THE SECURITIES LAWS OF ANY STATE AND MAY
NOT BE RESOLD OR  TRANSFERRED  UNLESS IT IS REGISTERED  PURSUANT TO SUCH ACT AND
LAWS  OR  IS  SOLD  OR  TRANSFERRED  IN  TRANSACTIONS   WHICH  ARE  EXEMPT  FROM
REGISTRATION UNDER SUCH ACT AND UNDER APPLICABLE STATE LAW AND IS TRANSFERRED IN
ACCORDANCE WITH THE PROVISIONS OF SECTION 4.02 OF THE TRUST  AGREEMENT  REFERRED
TO HEREIN.  THIS  CERTIFICATE  MAY BE SOLD TO "QUALIFIED  INSTITUTIONAL  BUYERS"
PURSUANT  TO RULE  144A  UNDER THE ACT AND,  IN  CERTAIN  LIMITED  CIRCUMSTANCES
DESCRIBED  IN  THE  TRUST  AGREEMENT,  TO  A  LIMITED  NUMBER  OF  INSTITUTIONAL
ACCREDITED  INVESTORS.  THIS CERTIFICATE IS ALSO SUBJECT TO CERTAIN RESTRICTIONS
ON TRANSFER  TO EMPLOYEE  BENEFIT  PLANS AND OTHER  ARRANGEMENTS  SUBJECT TO THE
EMPLOYEE  RETIREMENT INCOME SECURITY ACT OF 1974, AS AMENDED, OR SECTION 4975 OF
THE INTERNAL REVENUE CODE OF 1986.

[SOLELY FOR U.S.  FEDERAL  INCOME TAX PURPOSES,  THIS  CERTIFICATE IS A "REGULAR
INTEREST" IN A "REAL  ESTATE  MORTGAGE  INVESTMENT  CONDUIT," AS THOSE TERMS ARE
DEFINED, RESPECTIVELY, IN SECTIONS 860G AND 860D OF THE INTERNAL REVENUE CODE OF
1986. THE FOLLOWING  INFORMATION IS PROVIDED SOLELY FOR THE PURPOSES OF APPLYING
THE U.S.  FEDERAL  INCOME TAX  ORIGINAL  ISSUE  DISCOUNT  ("OID")  RULES TO THIS
CERTIFICATE.  THE ISSUE DATE OF THIS  CERTIFICATE IS _________,  200_.  ASSUMING
THAT THE MORTGAGE LOANS PREPAY AT THE PREPAYMENT  ASSUMPTION,  THIS  CERTIFICATE
HAS BEEN ISSUED WITH NO MORE THAN $____ OF OID PER $1,000 OF INITIAL CERTIFICATE
PRINCIPAL  BALANCE,  THE  YIELD TO  MATURITY  IS  ____%  AND THE  AMOUNT  OF OID
ATTRIBUTABLE  TO THE INITIAL  ACCRUAL PERIOD IS NO MORE THAN $____ PER $1,000 OF
INITIAL CERTIFICATE PRINCIPAL BALANCE, COMPUTED USING THE APPROXIMATE METHOD. NO
REPRESENTATION  IS MADE THAT THE  MORTGAGE  LOANS WILL PREPAY AT A RATE BASED ON
THE PREPAYMENT ASSUMPTION OR AT ANY OTHER RATE.]

UNLESS THIS  CERTIFICATE  IS PRESENTED BY AN  AUTHORIZED  REPRESENTATIVE  OF THE
DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), TO ISSUER OR ITS AGENT
FOR REGISTRATION OF TRANSFER,  EXCHANGE,  OR PAYMENT, AND ANY CERTIFICATE ISSUED
IS  REGISTERED IN THE NAME OF [CEDE & CO.] OR IN SUCH OTHER NAME AS IS REQUESTED
BY AN AUTHORIZED  REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO [CEDE & CO.]
OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE




                                      C-1
<PAGE>

OF DTC), ANY TRANSFER,  PLEDGE, OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR
TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, [CEDE & CO.],
HAS AN INTEREST HEREIN.




                                      C-2
<PAGE>



Certificate No.                                            CUSIP:


          Class B                   Weighted Average Pass-Through Rate
_____________________________       _________________________________________


Date of Trust Agreement             Aggregate Initial Certificate
_________, 200_                     Principal Balance of Class B
                                    Certificates:  $__________


Initial Payment Date:  _________,   Initial Certificate Principal
200_                                Balance of this Certificate:$___________


                               TRUST CERTIFICATE,

                                 Series 200_-__

     evidencing  a  percentage  interest in any  distributions  allocable to the
     Class B  Certificates  with  respect  to the Trust Fund  consisting  of the
     Underlying  Certificates  formed  and sold by Credit  Suisse  First  Boston
     Mortgage Securities Corp.

     This  Certificate  is payable solely from the assets of the Trust Fund, and
does not  represent an  obligation  of or interest in Credit Suisse First Boston
Mortgage  Securities  Corp.,  the  Trustee  referred  to  below  or any of their
affiliates.  Neither  this  Certificate  nor  the  Underlying  Certificates  are
guaranteed or insured by any governmental agency or instrumentality or by Credit
Suisse First Boston  Mortgage  Securities  Corp.  or the Trustee or any of their
affiliates.

     This certifies that [Cede & Co.] is the registered  owner of the Percentage
Interest  evidenced  by this  Certificate  (obtained  by  dividing  the  initial
Certificate  Principal  Balance of this  Certificate  by the  aggregate  initial
Certificate  Principal  Balance of all Class B  Certificates,  both as specified
above)  in  certain  distributions  with  respect  to a  Trust  Fund  consisting
primarily of a pool of the  Underlying  Certificates,  formed and sold by Credit
Suisse  First  Boston  Mortgage   Securities  Corp.   (hereinafter   called  the
"Depositor",  which term  includes  any  successor  entity  under the  Agreement
referred  to below).  The Trust Fund was created  pursuant to a Trust  Agreement
dated  as  specified   above  (the   "Agreement")   among  the   Depositor   and
_____________________,  as trustee (the "Trustee"),  a summary of certain of the
pertinent provisions of which is set forth hereafter.  To the extent not defined
herein,  the  capitalized  terms used herein have the  meanings  assigned in the
Agreement.  This  Certificate  is issued  under  and is  subject  to the  terms,
provisions  and conditions of the  Agreement,  to which  Agreement the Holder of
this  Certificate by virtue of the  acceptance  hereof assents and by which such
Holder is bound.

     Pursuant to the terms of the Agreement,  a distribution will be made on the
date (the  "Payment  Date")  which is the later of (a) the second  Business  Day
following the latest related  Distribution  Date on the Underlying  Certificates
and (b) the date on which both the  distribution  with  respect to each  related
Underlying  Certificate  and the related  Distribution  Date Statement have been
received by the Trustee, but no later than five Business Days following the



                                      C-3
<PAGE>


date set forth in clause (a)  (provided  that the initial  Payment Date shall be
_________,  200_), to the Person in whose name this Certificate is registered at
the close of  business  on the last day (or if such  last day is not a  Business
Day,  the  Business  Day  immediately  preceding  such  last  day) of the  month
preceding  the month of the latest  related  Distribution  Date for the  related
Underlying  Certificates  or, under certain  circumstances,  the preceding month
(the "Record Date"),  from the Available Funds in an amount equal to the product
of the Percentage Interest evidenced by this Certificate and the amount required
to be distributed to Holders of  Certificates  of this Class of  Certificates on
such Payment Date.

     Distributions   on  this  Certificate  will  be  made  by  the  Trustee  in
immediately  available  funds (by wire transfer or otherwise) for the account of
the Person  entitled  thereto  except as otherwise  provided in the Agreement if
such  Person  shall have so  notified  the  Trustee,  or by check  mailed to the
address of the Person entitled thereto, as such name and address shall appear on
the Certificate Register.

     Notwithstanding  the above, the final distribution on this Certificate will
be made  after due notice of the  pendency  of such  distribution  and only upon
presentation and surrender of this Certificate at the office or agency appointed
by the Trustee for that  purpose in the City and State of New York.  The initial
aggregate Certificate Principal Balance of the Class B Certificates is set forth
above. The Certificate Principal Balance hereof will be reduced to the extent of
the  distributions  allocable to principal and as further set forth in the Trust
Agreement.

     No transfer of a  Certificate  will be made unless such  transfer is exempt
from or is made in accordance with the registration  requirements of the Act and
any applicable state securities laws. In the event that such a transfer is to be
made without such  registration or  qualification,  (i) if this Certificate is a
Definitive  Certificate,  the  Depositor  and  the  Trustee  shall  require  the
transferee to execute an investment letter in substantially the form attached as
either Exhibit F or Exhibit H to the Trust Agreement,  which  investment  letter
shall not be an expense of the  Depositor  or the  Trustee and (ii) in the event
that  such a  transfer  is not made  pursuant  to Rule 144A  under the Act,  the
Depositor shall require an Opinion of Counsel satisfactory to the Depositor that
such  transfer may be made without such  registration  or  qualification,  which
Opinion of Counsel  shall not be an expense  of the  Depositor  or the  Trustee.
Neither the Depositor nor the Trustee will  register the  Certificate  under the
Act,  qualify  this  Certificate  under  any  state  securities  law or  provide
registration  rights to any purchaser.  Any such holder  desiring to effect such
transfer  shall,  and does  hereby  agree  to,  indemnify  the  Trustee  and the
Depositor against any liability that may result if the transfer is not so exempt
or is not made in accordance with such federal and state laws.

     In connection  with any transfer of a Definitive  Certificate,  the Trustee
will require (i) a representation, in the form set forth in Exhibit F or Exhibit
H, stating that the  transferee  is not, and is not  purchasing on behalf of, or
with "plan assets" of an employee benefit plan or other  arrangement  subject to
the  fiduciary  responsibility  provisions  of the  Employee  Retirement  Income
Security Act of 1974,  as amended  ("ERISA"),  or is an insurance  company whose
purchase  satisfies  certain  conditions set forth in the Agreement,  or (ii) an
opinion of counsel  acceptable to and in form and substance  satisfactory to the
Trustee and the Depositor  with respect to the  permissibility  of such transfer
under ERISA and stating,  among other things, that the transferee's  acquisition
of this Certificate will not constitute or result in a non-exempt



                                      C-4
<PAGE>


"prohibited  transaction"  within the  meaning  of ERISA or Section  4975 of the
Internal Revenue Code of 1986.

     This Certificate is one of a duly authorized  issue of Certificates  issued
in several  Classes  designated as Trust  Certificates  of the Series  specified
hereon (herein  collectively  called the  "Certificates").  The Certificates are
limited in right of payment to certain collections and recoveries respecting the
Underlying  Certificates,  all as more  specifically set forth herein and in the
Agreement.

     As  provided  in the  Agreement,  withdrawals  from the  Trust  Certificate
Account created for the benefit of Certificateholders may be made by the Trustee
from time to time for purposes other than  distributions to  Certificateholders,
such purposes  including without  limitation  reimbursement to the Depositor and
the Trustee of advances made, or certain expenses incurred, by either of them.

     The  Agreement  permits,  with certain  exceptions  therein  provided,  the
amendment of the Agreement and the modification of the rights and obligations of
the Depositor and the Trustee and the rights of the Certificateholders under the
Agreement at any time by the  Depositor  and the Trustee with the consent of the
Holders of  Certificates  evidencing  in the  aggregate not less than 66% of the
Percentage  Interests of each Class of Certificates  affected thereby.  Any such
consent by the Holder of this  Certificate  shall be  conclusive  and binding on
such  Holder  and  upon  all  future  holders  of  this  Certificate  and of any
Certificate  issued upon the transfer  hereof or in exchange  herefor or in lieu
hereof whether or not notation of such consent is made upon the Certificate. The
Agreement also permits the amendment  thereof in certain  circumstances  without
the consent of the Holders of any of the Certificates.

     As provided in the Agreement and subject to certain limitations therein set
forth,  the  transfer of this  Certificate  is  registrable  in the  Certificate
Register upon surrender of this  Certificate for registration of transfer at the
offices or agencies  appointed by the Trustee in the City and State of New York,
duly  endorsed by, or  accompanied  by an  assignment in the form below or other
written  instrument  of  transfer  in form  satisfactory  to the Trustee and the
Certificate  Registrar  duly  executed  by, the Holder  hereof or such  Holder's
attorney duly authorized in writing,  and thereupon one or more new Certificates
of authorized  denominations  evidencing the same Class and aggregate Percentage
Interest will be issued to the designated transferee or transferees.

     The  Certificates  are issuable  only as  registered  Certificates  without
coupons in Classes and in denominations  specified in the Agreement. As provided
in  the  Agreement  and  subject  to  certain  limitations  therein  set  forth,
Certificates are  exchangeable for new Certificates of authorized  denominations
evidencing the same Class and aggregate Percentage Interest, as requested by the
Holder surrendering the same.

     No service  charge  will be made for any such  registration  of transfer or
exchange,  but the Trustee may require  payment of a sum sufficient to cover any
tax or other governmental charge payable in connection therewith.



                                      C-5
<PAGE>

     The Depositor,  the Trustee and the Certificate  Registrar and any agent of
the Depositor,  the Trustee or the Certificate Registrar may treat the Person in
whose name this  Certificate is registered as the owner hereof for all purposes,
and neither the  Depositor,  the Trustee nor any such agent shall be affected by
notice to the contrary.

     This Certificate  shall be governed by and construed in accordance with the
laws of the State of __________.

     The obligations created by the Agreement in respect of the Certificates and
the  Trust  Fund  created   thereby   shall   terminate   upon  the  payment  to
Certificateholders  of all  amounts  held by or on  behalf  of the  Trustee  and
required to be paid to them pursuant to the Agreement  following  receipt of the
final  distribution to be made on the last remaining  Underlying  Certificate in
the Trust Fund upon presentation and surrender of such Underlying Certificate in
accordance with the terms and conditions of the related Underlying Agreement.




                                      C-6
<PAGE>

     IN WITNESS  WHEREOF,  the Trustee has caused  this  Certificate  to be duly
executed.



                               ________________________, as Trustee




                              By:__________________________________
                                 Authorized Signatory


     This is one of the Trust Certificates  referred to in the  within-mentioned
Agreement.



                               _______________________________,
                               as Certificate Registrar




                               By:___________________________________
                                  Authorized Signatory




                                      C-7
<PAGE>



                                   ASSIGNMENT

     FOR  VALUE  RECEIVED,   the  undersigned  hereby  sell(s),   assign(s)  and
transfer(s)               unto__________________________________________________
________________________________________________________________________________
_____________________________________   (Please  print  or  typewrite  name  and
address including postal zip code of assignee) the beneficial interest evidenced
by  the  within  Trust   Certificate  and  hereby  authorizes  the  transfer  of
registration  of such  interest to assignee on the  Certificate  Register of the
Trust Fund.

     I (We) further direct the Certificate  Registrar to issue a new Certificate
of a like  denomination  and Class, to the above named assignee and deliver such
Certificate to the following address:



_______________________________________________________________________________

Dated:


                                    _________________________________________
                                    Signature by or on behalf of assignor


                                    _________________________________________
                                    Signature Guaranteed



                            DISTRIBUTION INSTRUCTIONS

     The assignee should include the following for purposes of distribution:

     Distributions shall be made, by wire transfer or otherwise,  in immediately
available funds to __________________________________ for the account of _______
____________________  account  number , or, if mailed  by  check,  to  _________
__________________________________________.   Applicable  statements  should  be
mailed to ____________________________________________.

     This information is provided by ____________________________________,

the assignee named above, or __________________________________, as its agent.





                                      C-8
<PAGE>



                                    EXHIBIT D

                           FORM OF CLASS R CERTIFICATE

THIS  CERTIFICATE  MAY NOT BE  TRANSFERRED  TO A NON-UNITED  STATES  PERSON OR A
DISQUALIFIED ORGANIZATION (AS DEFINED BELOW).

SOLELY FOR U.S.  FEDERAL  INCOME TAX PURPOSES,  THIS  CERTIFICATE IS A "RESIDUAL
INTEREST"  IN A "REAL  ESTATE  MORTGAGE  INVESTMENT  CONDUIT" AS THOSE TERMS ARE
DEFINED, RESPECTIVELY, IN SECTIONS 860G AND 860D OF THE INTERNAL REVENUE CODE OF
1986 (THE "CODE").

THIS  CERTIFICATE  HAS NOT BEEN AND WILL NOT BE REGISTERED  UNDER THE SECURITIES
ACT OF 1933, AS AMENDED (THE "ACT"), OR THE SECURITIES LAWS OF ANY STATE AND MAY
NOT BE RESOLD OR  TRANSFERRED  UNLESS IT IS REGISTERED  PURSUANT TO SUCH ACT AND
LAWS  OR  IS  SOLD  OR  TRANSFERRED  IN  TRANSACTIONS   WHICH  ARE  EXEMPT  FROM
REGISTRATION UNDER SUCH ACT AND UNDER APPLICABLE STATE LAW AND IS TRANSFERRED IN
ACCORDANCE  WITH THE  PROVISIONS  OF SECTION 4.02 OF THE  AGREEMENT  REFERRED TO
HEREIN.  THIS  CERTIFICATE  MAY BE  SOLD  TO  "QUALIFIED  INSTITUTIONAL  BUYERS"
PURSUANT TO RULE 144A UNDER THE ACT. THIS CERTIFICATE IS ALSO SUBJECT TO CERTAIN
RESTRICTIONS  ON  TRANSFER  TO  EMPLOYEE  BENEFIT  PLANS AND OTHER  ARRANGEMENTS
SUBJECT TO THE EMPLOYEE  RETIREMENT INCOME SECURITY ACT OF 1974, AS AMENDED,  OR
SECTION 4975 OF THE INTERNAL REVENUE CODE OF 1986.

ANY RESALE,  TRANSFER OR OTHER  DISPOSITION  OF THIS CLASS R CERTIFICATE  MAY BE
MADE ONLY IF THE  PROPOSED  TRANSFEREE  PROVIDES  A  TRANSFER  AFFIDAVIT  TO THE
TRUSTEE THAT (1) SUCH TRANSFEREE IS NOT EITHER (A) THE UNITED STATES,  ANY STATE
OR ANY POLITICAL  SUBDIVISION  THEREOF,  ANY POSSESSION OF THE UNITED STATES, OR
ANY  AGENCY  OR   INSTRUMENTALITY  OF  ANY  OF  THE  FOREGOING  (OTHER  THAN  AN
INSTRUMENTALITY  WHICH IS A CORPORATION  IF ALL OF ITS ACTIVITIES ARE SUBJECT TO
TAX AND,  EXCEPT FOR THE FEDERAL HOME LOAN MORTGAGE  CORPORATION,  A MAJORITY OF
ITS BOARD OF  DIRECTORS IS NOT SELECTED BY ANY SUCH  GOVERNMENTAL  UNIT),  (B) A
FOREIGN GOVERNMENT,  INTERNATIONAL ORGANIZATION OR ANY AGENCY OR INSTRUMENTALITY
OF  EITHER  OF THE  FOREGOING,  (C) 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 (UNLESS SUCH ORGANIZATION IS SUBJECT TO THE TAX
IMPOSED BY SECTION 511 OF THE CODE ON UNRELATED  BUSINESS TAXABLE  INCOME),  (D)
RURAL ELECTRIC AND TELEPHONE  COOPERATIVES DESCRIBED IN SECTION 1381 OF THE CODE
AND (E) AN ELECTING  LARGE  PARTNERSHIP  UNDER SECTION 775 OF THE CODE (ANY SUCH
PERSON  DESCRIBED IN THE  FOREGOING  CLAUSES (A),  (B),  (C),  (D), or (E) BEING
HEREINAFTER  REFERRED TO AS A "DISQUALIFIED  ORGANIZATION") OR (F) AN AGENT OF A
DISQUALIFIED  ORGANIZATION,  (2) NO  PURPOSE OF SUCH  TRANSFER  IS TO IMPEDE THE
ASSESSMENT OR COLLECTION



                                      D-1
<PAGE>

OF TAX, AND (3) SUCH TRANSFEREE SATISFIES CERTAIN ADDITIONAL CONDITIONS.






                                      D-2
<PAGE>


Class R                             Certificate No. R-1


Date of Trust Agreement:            100% Percentage Interest
_________, 200_


                               TRUST CERTIFICATE,

                                 Series 200_-__

     evidencing a 100% undivided interest in any distributions  allocable to the
     Class R Certificate  with respect to the Trust Fund consisting of a pool of
     Underlying  Certificates  formed  and sold by Credit  Suisse  First  Boston
     Mortgage Securities Corp.

     This  Certificate  is payable solely from the assets of the Trust Fund, and
does not  represent an  obligation  of or interest in Credit Suisse First Boston
Mortgage  Securities  Corp.  or the  Trustee  referred  to below or any of their
affiliates.  Neither  this  Certificate  nor  the  Underlying  Certificates  are
guaranteed or insured by any governmental agency or instrumentality or by Credit
Suisse  First  Boston  Mortgage  Securities  Corp.,  the Trustee or any of their
affiliates.

     This  certifies  that  CREDIT  SUISSE  FIRST  BOSTON   CORPORATION  is  the
registered  owner of a 100%  undivided  interest in certain  distributions  with
respect  to  the  Trust  Fund  consisting  primarily  of a  pool  of  Underlying
Certificates,  formed and sold by Credit Suisse First Boston Mortgage Securities
Corp.  (hereinafter  called the  "Depositor",  which term includes any successor
entity  under the  Agreement  referred  to below).  The Trust  Fund was  created
pursuant to a Trust Agreement dated as specified above (the  "Agreement")  among
the Depositor and __________________,  as trustee (the "Trustee"),  a summary of
certain of the  pertinent  provisions  of which is set forth  hereafter.  To the
extent not defined herein,  the capitalized  terms used herein have the meanings
assigned in the  Agreement.  This  Certificate is issued under and is subject to
the terms,  provisions and conditions of the Agreement,  to which  Agreement the
Holder of this  Certificate  by virtue of the  acceptance  hereof assents and by
which such Holder is bound.

     Pursuant to the terms of the Agreement,  a distribution will be made on the
date (the  "Payment  Date")  which is the later of (a) the second  Business  Day
following the latest related  Distribution  Date on the Underlying  Certificates
and (b) the date on which both the  distribution  with  respect to each  related
Underlying  Certificate  and the related  Distribution  Date Statement have been
received by the Trustee, but no later than five Business Days following the date
set forth in  clause  (a)  (provided  that the  initial  Payment  Date  shall be
________,  200_), to the Person in whose name this  Certificate is registered at
the close of  business  on the last day (or if such  last day is not a  Business
Day,  the  Business  Day  immediately  preceding  such  last  day) of the  month
preceding  the month of the latest  related  Distribution  Date for the  related
Underlying  Certificates  or, under certain  circumstances,  the preceding month
(the "Record Date"),  from the Available Funds in an amount equal to the product
of the Percentage Interest evidenced by this Certificate and the amount required
to be distributed to Holders of  Certificates  of this Class of  Certificates on
such Payment Date.




                                      D-3
<PAGE>


     Distributions   on  this  Certificate  will  be  made  by  the  Trustee  in
immediately  available  funds (by wire transfer or otherwise) for the account of
the Person  entitled  thereto  except as otherwise  provided in the Agreement if
such  Person  shall have so  notified  the  Trustee,  or by check  mailed to the
address of the Person entitled thereto, as such name and address shall appear on
the Certificate Register.

     Notwithstanding  the above, the final distribution on this Certificate will
be made  after due notice of the  pendency  of such  distribution  and only upon
presentation and surrender of this Certificate at the office or agency appointed
by the Trustee for that purpose in the City and State of New York.

     No transfer of this Certificate will be made unless such transfer is exempt
from the  registration  requirements  of the Act  pursuant  to Rule 144A and any
applicable  state  securities  laws.  In the event that such a transfer is to be
made,  the Depositor  and the Trustee  shall  require the  transferee to execute
investment  letters in substantially the forms attached as Exhibits H and I-1 to
the Trust  Agreement,  which  investment  letters shall not be an expense of the
Depositor or the Trustee,  stating,  among other things,  that the transferee is
not, and is not  purchasing  on behalf of, or with "plan  assets" of an employee
benefit  plan or  other  arrangement  subject  to the  fiduciary  responsibility
provisions of the Employee  Retirement  Income  Security Act of 1974, as amended
("ERISA").  Neither the Depositor nor the Trustee will register the  Certificate
under the Act,  qualify  this  Certificate  under any  state  securities  law or
provide registration rights to any purchaser. Any such holder desiring to effect
such  transfer  shall,  and does hereby agree to,  indemnify the Trustee and the
Depositor against any liability that may result if the transfer is not so exempt
or is not made in accordance with such federal and state laws.

     Each Holder of this Class R Certificate will be deemed to have agreed to be
bound by the restrictions set forth in the Agreement to the effect that (i) each
person  holding or acquiring any Ownership  Interest in this Class R Certificate
must be a Permitted  Transferee  and a United States  Person,  (ii) no Ownership
Interest  in this Class R  Certificate  may be  transferred  without the express
written  consent of the  Depositor,  which  consent  may be  conditioned  on the
delivery to the  Depositor  of,  among other  things,  an opinion of counsel and
(iii) any  attempted or  purported  transfer of any  Ownership  Interest in this
Class R Certificate in violation of such  restrictions  will be absolutely  null
and void and will vest no rights in the purported transferee.

     This Certificate is one of a duly authorized  issue of Certificates  issued
in several  Classes  designated as Trust  Certificates  of the Series  specified
hereon (herein  collectively  called the  "Certificates").  The Certificates are
limited in right of payment to certain collections and recoveries respecting the
Underlying  Certificates,  all as more  specifically set forth herein and in the
Agreement.

     The Certificates are limited in right of payment to certain collections and
recoveries respecting the Underlying Certificates,  all as more specifically set
forth herein and in the Agreement.

     As  provided  in the  Agreement,  withdrawals  from the  Trust  Certificate
Account created for the benefit of Certificateholders may be made by the Trustee
from time to time for purposes other than  distributions to  Certificateholders,
such purposes including without



                                      D-4
<PAGE>

limitation  reimbursement  to the Depositor and the Trustee of advances made, or
certain expenses incurred, by either of them.

     The  Agreement  permits,  with certain  exceptions  therein  provided,  the
amendment of the Agreement and the modification of the rights and obligations of
the Depositor and the Trustee and the rights of the Certificateholders under the
Agreement at any time by the  Depositor  and the Trustee with the consent of the
Holders of  Certificates  evidencing  in the  aggregate not less than 66% of the
Percentage  Interests of each Class of Certificates  affected thereby.  Any such
consent by the Holder of this  Certificate  shall be  conclusive  and binding on
such  Holder  and  upon  all  future  holders  of  this  Certificate  and of any
Certificate  issued upon the transfer  hereof or in exchange  herefor or in lieu
hereof whether or not notation of such consent is made upon the Certificate. The
Agreement also permits the amendment  thereof in certain  circumstances  without
the consent of the Holders of any of the Certificates.

     As provided in the Agreement and subject to certain limitations therein set
forth,  the  transfer of this  Certificate  is  registrable  in the  Certificate
Register upon surrender of this  Certificate for registration of transfer at the
offices or agencies  appointed by the Trustee in the City and State of New York,
duly  endorsed by, or  accompanied  by an  assignment in the form below or other
written  instrument  of  transfer  in form  satisfactory  to the Trustee and the
Certificate  Registrar  duly  executed  by, the Holder  hereof or such  Holder's
attorney duly authorized in writing,  and thereupon one or more new Certificates
of authorized  denominations  evidencing the same Class and aggregate Percentage
Interest will be issued to the designated transferee or transferees.

     The  Certificates  are issuable  only as  registered  Certificates  without
coupons in Classes and in denominations  specified in the Agreement. As provided
in  the  Agreement  and  subject  to  certain  limitations  therein  set  forth,
Certificates are  exchangeable for new Certificates of authorized  denominations
evidencing the same Class and aggregate Percentage Interest, as requested by the
Holder surrendering the same.

     No service  charge  will be made for any such  registration  of transfer or
exchange,  but the Trustee may require  payment of a sum sufficient to cover any
tax or other governmental charge payable in connection therewith.

     The Depositor,  the Trustee and the Certificate  Registrar and any agent of
the Depositor,  the Trustee or the Certificate Registrar may treat the Person in
whose name this  Certificate is registered as the owner hereof for all purposes,
and neither the  Depositor,  the Trustee nor any such agent shall be affected by
notice to the contrary.

     This Certificate  shall be governed by and construed in accordance with the
laws of the State of _________.

     The obligations created by the Agreement in respect of the Certificates and
the  Trust  Fund  created   thereby   shall   terminate   upon  the  payment  to
Certificateholders  of all  amounts  held by or on  behalf  of the  Trustee  and
required to be paid to them pursuant to the Agreement  following  receipt of the
final distribution to be made on the last remaining Underlying Certificate




                                      D-5
<PAGE>

in the Trust Fund upon presentation and surrender of such Underlying Certificate
in accordance with the terms and conditions of the related Underlying Agreement.



                                      D-6
<PAGE>




     IN WITNESS  WHEREOF,  the Trustee has caused  this  Certificate  to be duly
executed.



                               _______________________, as Trustee




                               By:_________________________________
                                  Authorized Signatory


     This is one of the Trust Certificates  referred to in the  within-mentioned
Agreement.



                               ________________________________,
                               as Certificate Registrar




                               By:________________________________
                                  Authorized Signatory




                                      D-7
<PAGE>



                                   ASSIGNMENT

     FOR  VALUE  RECEIVED,   the  undersigned  hereby  sell(s),   assign(s)  and
transfer(s)        unto        _________________________________________________
________________________________________________________________________________
_______________________________________________________    (Please    print   or
typewrite name and address including postal zip code of assignee) the beneficial
interest  evidenced by the within Trust  Certificate  and hereby  authorizes the
transfer  of  registration  of such  interest  to  assignee  on the  Certificate
Register of the Trust Fund.

     I (We) further direct the Certificate  Registrar to issue a new Certificate
of a like  denomination  and Class, to the above named assignee and deliver such
Certificate to the following address:


________________________________________________________________________________

Dated:


                                    __________________________________________
                                    Signature by or on behalf of assignor


                                    __________________________________________
                                    Signature Guaranteed



                            DISTRIBUTION INSTRUCTIONS

     The assignee should include the following for purposes of distribution:

     Distributions shall be made, by wire transfer or otherwise,  in immediately
available funds to _____________________________________________ for the account
of      _______________________________________________      account      number
___________________________,      or,     if     mailed     by     check,     to
_____________________________.   Applicable   statements  should  be  mailed  to
__________________________________.

     This information is provided by _________________________________,

     the assignee named above, or _________________________________________,  as
its agent.



                                      D-8
<PAGE>



                                    EXHIBIT E

                           UNDERLYING CERTIFICATE AND

                          UNDERLYING AGREEMENT SCHEDULE

$________   aggregate   principal   amount   of   ______________________________
Certificates,  Series  ______ Class ___ were issued  pursuant to the Pooling and
Servicing    Agreement,     dated    as    of    _______    1,    ____,    among
_____________________________________________________.

$________   aggregate   principal  amount  of   ________________________________
Certificates,  Series  ______ Class ___ were issued  pursuant to the Pooling and
Servicing    Agreement,     dated    as    of    _______    1,    ____,    among
_____________________________________________________.

$_________   aggregate   principal  amount  of   _______________________________
Certificates,  Series  ______ Class ___ were issued  pursuant to the Pooling and
Servicing    Agreement,     dated    as    of    _______    1,    ____,    among
____________________________________________________.




                                      E-1
<PAGE>

                                    EXHIBIT F

                     FORM OF INVESTOR REPRESENTATION LETTER

                                                             _____________, 20__


Credit Suisse First Boston Mortgage Securities Corp.
11 Madison Avenue
New York, New York 10010

[Trustee]

Attention:  Corporate Trust Administration

                Re:  Credit Suisse First Boston Mortgage
                     Securities Corp., Trust Certificates, Series
                     200_-__, Class

Dear Sirs:

     ____________________________________________  (the  "Purchaser")  has today
purchased in a private  resale from  ___________________________________________
(the "Seller") [$______ initial principal amount of] [a __% Percentage  Interest
in] Trust Certificates,  Series 200_-__,  Class __ (the "Certificates"),  issued
pursuant to the Trust Agreement (the "Trust Agreement"),  dated as of _________,
200_ among Credit  Suisse First Boston  Mortgage  Securities  Corp, as depositor
(the "Depositor") and  ______________________,  as trustee (the "Trustee").  The
undersigned hereby certifies and agrees on behalf of the Purchaser:

     1.  The  Purchaser  is an  institutional  investor  and  is  acquiring  the
Certificates  either  (a) for its own  account  or for  accounts  for  which  it
exercises  sole  investment  discretion  and not  with a view to or for  sale in
connection  with  any  distribution   thereof,   subject   nevertheless  to  any
requirement of law that the disposition of the Purchaser's property shall at all
times be and remain  within  its  control,  or (b) for  resale to  institutional
investors in accordance with the provisions of the Trust Agreement.

     2. The  Purchaser  has  received  and  reviewed  (a) a copy of the  Private
Placement Memorandum relating to the Certificates and (b) such other information
concerning  the  Certificates  and the  Depositor  as has been  requested by the
Purchaser  and  is  relevant  to  the  Purchaser's   decision  to  purchase  the
Certificates.

     3. The  Purchaser  has such  expertise,  knowledge  and  sophistication  in
financial and business matters generally,  and in financial and business matters
related  to  securities  similar to the  Certificates  in  particular,  as to be
capable of evaluating the merits and risks of an investment in the  Certificates
and it (or any account  referred to above) is able to bear the economic risks of
such an investment.

     4.  The  Purchaser  will  comply  with all  applicable  federal  and  state
securities laws in connection with any subsequent  resale of the Certificates by
the Purchaser.




                                      F-1
<PAGE>


     5. The Purchaser  understands that (a) the  Certificates  have not been and
will not be registered  under the  Securities Act of 1933, as amended (the "1933
Act"),  (b) the Depositor is not required to so register the  Certificates,  (c)
the Certificates may be resold only if registered  pursuant to the provisions of
the 1933 Act, or if an exemption from such  registration  is available,  (d) the
Trust   Agreement   contains   restrictions   regarding   the  transfer  of  the
Certificates,  (e) the  Certificates  will bear a legend to the foregoing effect
and (f) a stop order may be placed in the certificate  register  relating to the
Certificates  against the transfer of any Certificate subject to compliance with
the 1933 Act, the rules and regulations thereunder and state securities laws.

     6. If the  Purchaser  sells any of the  Certificates,  the  Purchaser  will
comply with any applicable  requirements  set forth in Section 4.02 of the Trust
Agreement.

     7. The  Purchaser  (i) is not an employee  benefit or other plan subject to
the Employee  Retirement Income Security Act of 1974, as amended  ("ERISA"),  or
the Internal  Revenue Code of 1986,  as amended (the  "Code"),  nor a Person (as
such term is defined in the Trust Agreement) acting, directly or indirectly,  on
behalf of any such plan,  or using "plan  assets" of any such plan to effect its
purchase of the  Certificate;  or (ii) has  delivered an opinion of its counsel,
addressed and satisfactory to the Trustee and the Depositor,  to the effect that
the  purchase  and  holding of a  Certificate  by or on behalf of, or with "plan
assets" of, any such plan would be permissible  under  applicable law, would not
constitute or result in a non-exempt prohibited transaction under Section 406 of
ERISA or Section  4975 of the Code,  and would not subject the  Depositor or the
Trustee to any  obligation or liability  (including  liabilities  under ERISA or
Section  4975 of the Code) in addition  to those  explicitly  undertaken  in the
Trust Agreement;  or (iii) is an insurance company, is acquiring the Certificate
solely with assets of its general  account,  and such general account  satisfies
the conditions to the  applicability  of the exemptive  relief  available  under
Sections  I or III of U.S.  Department  of Labor  Prohibited  Transaction  Class
Exemption 95-60.

     8. The  Purchaser  will not nor has it  authorized or will it authorize any
person  to (a)  offer,  pledge,  sell,  dispose  of or  otherwise  transfer  any
Certificate,  any interest in any  Certificate or any other similar  security to
any person in any  manner,  (b)  solicit any offer to buy or to accept a pledge,
disposition  or  other  transfer  of  any  Certificate,   any  interest  in  any
Certificate  or any other similar  security  from any person in any manner,  (c)
otherwise approach or negotiate with respect to any Certificate, any interest in
any Certificate or any other similar security with any person in any manner, (d)
make any general  solicitation  by means of general  advertising or in any other
manner, or (e) take any other action,  that (as to any of (a) through (e) above)
would  constitute a  distribution  of any  Certificate  under the 1933 Act, that
would render the  disposition of any Certificate a violation of Section 5 of the
1933 Act or any state  securities  law, or that would  require  registration  or
qualification pursuant thereto.

     9.  The  Purchaser  will  not  sell  or  otherwise   transfer  any  of  the
Certificates,  except in compliance with the provisions of the Trust  Agreement.
The Purchaser  understands  that the  Certificates  were issued in a transaction
relying on Rule 3a-7 under the Investment  Company Act of 1940, as amended,  and
that the Certificates  may be sold and resold only to persons  specified in Rule
3a-7(a)(2)(i) or Rule 3a-7(a)(2)(ii), as applicable.

     In the case of any Class B Certificate:


                                      F-2
<PAGE>




     For purposes of Rule 3a-7(a)(2)(i) the Purchaser  satisfies the criteria in
the category marked below.

__   Any bank as defined in Section  3(a)(2) of the Act or any  savings and loan
     association or other  institution  as defined in Section  3(a)(5)(A) of the
     Act whether  acting in its  individual  or fiduciary  capacity;  any broker
     dealer registered  pursuant to Section 15 of the Securities Exchange Act of
     1934;  any  insurance  company as defined in Section  2(13) of the Act; any
     investment company registered under the Investment Company Act of 1940 or a
     business  development  company as defined in Section  2(a)(48) of that Act;
     any Small Business  Investment  Company licensed by the U.S. Small Business
     Administration under Section 301(c) or (d) of the Small Business Investment
     Act of 1958; any plan  established and maintained by a state, its political
     subdivisions,  or any agency or instrumentality of a state or its political
     subdivisions,  for the  benefit  of its  employees,  if such plan has total
     assets in excess of  $5,000,000;  any  employee  benefit  plan  within  the
     meaning of the Employee  Retirement  Income  Security  Act of 1974,  if the
     investment  decision  is made by a plan  fiduciary,  as  defined in Section
     3(21) of such Act,  which is either a bank,  savings and loan  association,
     insurance company,  or registered  investment  adviser,  or if the employee
     benefit  plan  has  total  assets  in  excess  of  $5,000,000,   or,  if  a
     self-directed  plan, with investment  decisions made solely by persons that
     are accredited investors.

__   Any private business  development  company as defined in Section 202(a)(22)
     of the Investment Advisers Act of 1940.

__   Any  organization  described in Section  501(c)(3) of the Internal  Revenue
     Code, corporation, Massachusetts or similar business trust, or partnership,
     not formed for the specific  purpose of acquiring the  securities  offered,
     with total assets in excess of $5,000,000.

__   Any trust with  total  assets in excess of  $5,000,000,  not formed for the
     specific  purpose of acquiring the  securities  offered,  whose purchase is
     directed by a sophisticated person as described in Rule 506(b)(2)(ii).

__   Any entity in which all of the equity  owners come with the  previous  four
     paragraphs.





                                         Very truly yours,

                                         By:__________________________________
                                         Name:________________________________
                                         Title:_______________________________




                                      F-3
<PAGE>

                                    EXHIBIT G

                    FORM OF TRANSFEROR REPRESENTATION LETTER



                                                           _______________, 20__



Credit Suisse First Boston Mortgage Securities Corp.
11 Madison Avenue
New York, New York 10010

[Trustee]

Attention:  Corporate Trust Administration

                Re:  Credit Suisse First Boston Mortgage
                     Securities Corp., Trust Certificates, Series
                     200_-__, Class

Dear Sirs:

     In  connection  with  the  sale  by  ___________  (the  "Seller")  to  (the
"Purchaser") of $_______ initial principal amount of Trust Certificates,  Series
200_-__,  Class __ (the "Certificates"),  issued pursuant to the Trust Agreement
(the "Trust  Agreement")  dated as of _________,  200_ among Credit Suisse First
Boston  Mortgage   Securities   Corp.,  as  depositor  (the   "Depositor")   and
____________________,  as trustee (the "Trustee"),  the Seller hereby certifies,
represents  and warrants to, and covenants  with,  the Depositor and the Trustee
that:

     Neither  the  Seller  nor  anyone  acting on its  behalf  has (a)  offered,
pledged,  sold,  disposed  of or  otherwise  transferred  any  Certificate,  any
interest in any  Certificate or any other similar  security to any person in any
manner, (b) has solicited any offer to buy or to accept a pledge, disposition or
other transfer of any Certificate,  any interest in any Certificate or any other
similar security from any person in any manner, (c) has otherwise  approached or
negotiated with respect to any  Certificate,  any interest in any Certificate or
any other  similar  security  with any  person in any  manner,  (d) has made any
general  solicitation by means of general advertising or in any other manner, or
(e) has taken any other action,  that (as to any of (a) through (e) above) would
constitute a distribution of the  Certificates  under the Securities Act of 1933
(the "Act"), that would render the disposition of any Certificate a violation of
Section  5 of the  Act or any  state  securities  law,  or  that  would  require
registration or qualification  pursuant thereto.  The Seller will not act in any
manner set forth in the foregoing sentence with respect to any Certificate.  The
Seller has not and will not sell or otherwise  transfer any of the Certificates,
except in  compliance  with the  provisions of the Trust  Agreement.  The Seller
understands that the Certificates  were issued in a transaction  relying on Rule
3a-7  under  the  Investment  Company  Act of  1940,  as  amended,  and that the
Certificates  may  be  sold  and  resold  only  to  persons  specified  in  Rule
3a-7(a)(2)(i) or Rule 3a-7(a)(2)(ii), as applicable.



                                      G-1
<PAGE>

                                    Very truly yours,



                                    _________________________________
                                    (Seller)




                                    By:______________________________
                                       Name:
                                       Title:




                                      G-2
<PAGE>

                                    EXHIBIT H

                  [FORM OF RULE 144A INVESTMENT REPRESENTATION]

             Description of Rule 144A Securities, including numbers:

             ______________________________________________________
             ______________________________________________________
             ______________________________________________________
             ______________________________________________________

     The undersigned  seller,  as registered  holder (the "Seller"),  intends to
transfer the Rule 144A Securities  described above to the undersigned buyer (the
"Buyer").

     1. In connection  with such transfer and in accordance  with the agreements
pursuant  to which the Rule 144A  Securities  were  issued,  the  Seller  hereby
certifies  the  following  facts:  Neither  the Seller nor anyone  acting on its
behalf has offered, transferred, pledged, sold or otherwise disposed of the Rule
144A  Securities,  any interest in the Rule 144A Securities or any other similar
security to, or solicited any offer to buy or accept a transfer, pledge or other
disposition  of  the  Rule  144A  Securities,  any  interest  in the  Rule  144A
Securities  or any other  similar  security  from,  or otherwise  approached  or
negotiated  with respect to the Rule 144A  Securities,  any interest in the Rule
144A Securities or any other similar security with, any person in any manner, or
made any general  solicitation  by means of general  advertising or in any other
manner,  or taken any other action,  that would constitute a distribution of the
Rule 144A  Securities  under the  Securities  Act of 1933, as amended (the "1933
Act"),  or that  would  render the  disposition  of the Rule 144A  Securities  a
violation of Section 5 of the 1933 Act or require registration pursuant thereto,
and that the Seller has not offered the Rule 144A Securities to any person other
than the Buyer or  another  "qualified  institutional  buyer" as defined in Rule
144A under the 1933 Act.

     2. The Buyer warrants and represents to, and covenants with, the Seller and
the Trustee pursuant to Section 4.02 of the Trust Agreement as follows:

     a.  The  Buyer  understands  that the Rule  144A  Securities  have not been
registered under the 1933 Act or the securities laws of any state.

     b. The Buyer considers  itself a substantial,  sophisticated  institutional
investor having such knowledge and experience in financial and business  matters
that it is capable of evaluating  the merits and risks of investment in the Rule
144A Securities.

     c. The Buyer has been  furnished  with all  information  regarding the Rule
144A  Securities  that it has  requested  from the  Seller,  the  Trustee or the
Depositor  and  has  received  and  reviewed  a copy  of the  Private  Placement
Memorandum with respect to the Certificates.

     d.  Neither  the  Buyer  nor  anyone  acting  on its  behalf  has  offered,
transferred,  pledged,  sold or otherwise  disposed of the Rule 144A Securities,
any interest in the Rule 144A  Securities or any other  similar  security to, or
solicited any offer to buy or accept a transfer,  pledge or other disposition of
the Rule 144A Securities,  any interest in the Rule 144A Securities or any other
similar security from, or otherwise approached or negotiated with respect to the
Rule 144A Securities, any interest in the Rule 144A Securities




                                      H-1
<PAGE>

or any other  similar  security  with,  any  person in any  manner,  or made any
general  solicitation by means of general advertising or in any other manner, or
taken any other action,  that would  constitute a distribution  of the Rule 144A
Securities  under the 1933 Act or that would render the  disposition of the Rule
144A Securities a violation of Section 5 of the 1933 Act or require registration
pursuant  thereto,  nor will it act, nor has it  authorized or will it authorize
any person to act, in such manner with respect to the Rule 144A Securities.

     e. The Buyer is a "qualified  institutional  buyer" as that term is defined
in Rule  144A  under  the  1933 Act and has  completed  either  of the  forms of
certification to that effect attached hereto as Annex 1 or Annex 2. The Buyer is
aware that the sale to it is being made in reliance  on Rule 144A.  The Buyer is
acquiring the Rule 144A  Securities for its own account or the accounts of other
qualified  institutional buyers,  understands that such Rule 144A Securities may
be resold, pledged or transferred only (i) to a person reasonably believed to be
a qualified  institutional  buyer that  purchases for its own account or for the
account  of a  qualified  institutional  buyer to whom  notice is given that the
resale,  pledge or  transfer  is being made in  reliance  on Rule 144A,  or (ii)
pursuant to another exemption from registration under the 1933 Act.

     3. The Buyer (i) is not an  employee  benefit or other plan  subject to the
Employee  Retirement Income Security Act of 1974, as amended  ("ERISA"),  or the
Internal  Revenue Code of 1986, as amended (the  "Code"),  nor a Person (as such
term is defined in the Trust  Agreement)  acting,  directly  or  indirectly,  on
behalf of any such plan,  or using "plan  assets" of any such plan to effect its
purchase  of  the  Certificate;  or  (ii)  except  in  the  case  of a  Class  R
Certificate, has delivered an opinion of its counsel, addressed and satisfactory
to the Trustee and the Depositor, to the effect that the purchase and holding of
a Certificate  by or on behalf of, or with "plan assets" of, any such plan would
be  permissible  under  applicable  law,  would  not  constitute  or result in a
non-exempt prohibited  transaction under Section 406 of ERISA or Section 4975 of
the Code,  and would not subject the Depositor or the Trustee to any  obligation
or liability (including  liabilities under ERISA or Section 4975 of the Code) in
addition to those explicitly undertaken in the Trust Agreement;  or (iii) except
in the case of a Class R Certificate,  is an insurance company, is acquiring the
Certificate solely with assets of its general account,  and such general account
satisfies the conditions to the  applicability of the exemptive relief available
under Sections I or III of U.S. Department of Labor Prohibited Transaction Class
Exemption 95-60.

     4. This  document  may be executed in one or more  counterparts  and by the
different  parties  hereto on  separate  counterparts,  each of  which,  when so
executed, shall be deemed to be an original; such counterparts,  together, shall
constitute one and the same document.




                                      H-2
<PAGE>

     IN WITNESS  WHEREOF,  each of the parties has executed  this document as of
the date set forth below.


________________________________             __________________________________
      Print Name of Seller                          Print Name of Buyer




By:_____________________________             By:_______________________________
   Name:                                        Name:
   Title:                                       Title:




_____________________________________        __________________________________
      Taxpayer Identification:                      Taxpayer Identification:


No._________________________________      No.__________________________________

Date:_______________________________      Date:________________________________




                                      H-3
<PAGE>

                                                            ANNEX 1 TO EXHIBIT H

            QUALIFIED INSTITUTIONAL BUYER STATUS UNDER SEC RULE 144A

             [For Buyers Other Than Registered Investment Companies]

     The  undersigned  hereby  certifies as follows in connection  with the Rule
144A Investment Representation to which this Certification is attached:

     1. As indicated  below,  the undersigned is the President,  Chief Financial
Officer, Senior Vice President or other executive officer of the Buyer.

     2. In  connection  with  purchases by the Buyer,  the Buyer is a "qualified
institutional  buyer" as that term is defined in Rule 144A under the  Securities
Act of 1933  ("Rule  144A")  because (i) the Buyer  owned  and/or  invested on a
discretionary  basis  $______________________/  in  securities  (except  for the
excluded  securities referred to below) as of the end of the Buyer's most recent
fiscal year (such amount being calculated in accordance with Rule 144A) and (ii)
the Buyer satisfies the criteria in the category marked below.

__   Corporation,  etc. The Buyer is a corporation  (other than a bank,  savings
     and loan  association  or similar  institution),  Massachusetts  or similar
     business  trust,  partnership,  or  charitable  organization  described  in
     Section 501(c)(3) of the Internal Revenue Code.

__   Bank.  The Buyer (a) is a national  bank or banking  institution  organized
     under the laws of any State,  territory or the  District of  Columbia,  the
     business of which is substantially confined to banking and is supervised by
     the State or  territorial  banking  commission or similar  official or is a
     foreign bank or equivalent institution, and (b) has an audited net worth of
     at  least  $25,000,000  as  demonstrated  in its  latest  annual  financial
     statements, a copy of which is attached hereto.

__   Savings and Loan. The Buyer (a) is a savings and loan association, building
     and loan association,  cooperative bank,  homestead  association or similar
     institution,  which  is  supervised  and  examined  by a State  or  Federal
     authority  having  supervision  over any such  institutions or is a foreign
     savings  and loan  association  or  equivalent  institution  and (b) has an
     audited net worth of at least  $25,000,000  as  demonstrated  in its latest
     annual financial statements.

__   Broker-Dealer.  The Buyer is a dealer registered  pursuant to Section 15 of
     the Securities Exchange Act of 1934.

__   Insurance  Company.  The Buyer is an insurance  company  whose  primary and
     predominant business activity is the writing of insurance or the reinsuring
     of risks  underwritten  by  insurance  companies  and which is  subject  to
     supervision by the insurance  commissioner or a similar  official or agency
     of a State or territory or the District of Columbia.



                                      H-4
<PAGE>


__   State or Local Plan.  The Buyer is a plan  established  and maintained by a
     State, its political subdivisions,  or any agency or instrumentality of the
     State or its political subdivisions, for the benefit of its employees.

__   ERISA  Plan.  The Buyer is an employee  benefit  plan within the meaning of
     Title I of the Employee Retirement Income Security Act of 1974.

__   Investment Adviser. The Buyer is an investment adviser registered under the
     Investment Advisers Act of 1940.

__   SBIC. The Buyer is a Small Business Investment Company licensed by the U.S.
     Small  Business  Administration  under  Section  301(c) or (d) of the Small
     Business Investment Act of 1958.

__   Business  Development  Company. The Buyer is a business development company
     as defined in Section 202(a)(22) of the Investment Advisers Act of 1940.

__   Trust  Fund.  The Buyer is a trust  fund  whose  trustee is a bank or trust
     company and whose  participants  are exclusively (a) plans  established and
     maintained  by a  State,  its  political  subdivisions,  or any  agency  or
     instrumentality of the State or its political subdivisions, for the benefit
     of its employees, or (b) employee benefit plans within the meaning of Title
     I of the Employee  Retirement  Income  Security  Act of 1974,  but is not a
     trust fund that includes as participants  individual retirement accounts or
     H.R. 10 plans.

     3. The term  "securities" as used herein does not include (i) securities of
issuers that are affiliated with the Buyer,  (ii) securities that are part of an
unsold  allotment  to or  subscription  by the Buyer,  if the Buyer is a dealer,
(iii) bank deposit notes and certificates of deposit,  (iv) loan participations,
(v) repurchase  agreements,  (vi)  securities  owned but subject to a repurchase
agreement and (vii) currency, interest rate and commodity swaps.

     4. For purposes of  determining  the aggregate  amount of securities  owned
and/or invested on a discretionary  basis by the Buyer,  the Buyer used the cost
of such  securities  to the  Buyer  and did not  include  any of the  securities
referred to in the preceding  paragraph.  Further, in determining such aggregate
amount,  the Buyer may have included  securities  owned by  subsidiaries  of the
Buyer,  but only if such  subsidiaries  are  consolidated  with the Buyer in its
financial  statements  prepared in accordance with generally accepted accounting
principles  and if the  investments of such  subsidiaries  are managed under the
Buyer's direction.  However, such securities were not included if the Buyer is a
majority-owned,  consolidated  subsidiary of another enterprise and the Buyer is
not itself a reporting company under the Securities Exchange Act of 1934.

     5.  The  Buyer  acknowledges  that  it  is  familiar  with  Rule  144A  and
understands  that the seller to it and other parties related to the Certificates
are relying and will continue to rely on the statements  made herein because one
or more sales to the Buyer may be in reliance on Rule 144A.




                                      H-5
<PAGE>

____ ____  Will the Buyer be purchasing the Rule 144A
 Yes  No       Securities only for the Buyer's own account?

     6. If the answer to the foregoing  question is "no", the Buyer agrees that,
in connection  with any purchase of securities sold to the Buyer for the account
of a third party (including any separate  account) in reliance on Rule 144A, the
Buyer will only  purchase for the account of a third party that at the time is a
"qualified  institutional  buyer"  within the meaning of Rule 144A. In addition,
the Buyer agrees that the Buyer will not purchase  securities  for a third party
unless the Buyer has  obtained a current  representation  letter from such third
party or taken other  appropriate  steps  contemplated  by Rule 144A to conclude
that  such  third  party   independently  meets  the  definition  of  "qualified
institutional buyer" set forth in Rule 144A.

     7. The Buyer will notify each of the parties to which this certification is
made of any changes in the information and conclusions herein. Until such notice
is given,  the  Buyer's  purchase  of Rule 144A  Securities  will  constitute  a
reaffirmation of this certification as of the date of such purchase.


                               ____________________________________
                               Print Name of Buyer




                               By:___________________________________
                                  Name:
                                  Title:



                               Date:__________________________________



                                      H-6
<PAGE>



                                                            ANNEX 2 TO EXHIBIT H

            QUALIFIED INSTITUTIONAL BUYER STATUS UNDER SEC RULE 144A

              [For Buyers That Are Registered Investment Companies]

     The  undersigned  hereby  certifies as follows in connection  with the Rule
144A Investment Representation to which this Certification is attached:

     1. As indicated  below,  the undersigned is the President,  Chief Financial
Officer or Senior Vice  President  of the Buyer or, if the Buyer is a "qualified
institutional  buyer" as that term is defined in Rule 144A under the  Securities
Act of 1933  ("Rule  144A")  because  Buyer  is part of a Family  of  Investment
Companies (as defined below), is such an officer of the Adviser.

     2. In  connection  with  purchases  by  Buyer,  the  Buyer is a  "qualified
institutional  buyer" as  defined in SEC Rule 144A  because  (i) the Buyer is an
investment company registered under the Investment Company Act of 1940, and (ii)
as marked below, the Buyer alone, or the Buyer's Family of Investment Companies,
owned at least  $100,000,000 in securities  (other than the excluded  securities
referred to below) as of the end of the Buyer's  most recent  fiscal  year.  For
purposes  of  determining  the  amount of  securities  owned by the Buyer or the
Buyer's Family of Investment Companies, the cost of such securities was used.

____ The Buyer owned $___________________ in securities (other than the excluded
     securities  referred  to below) as of the end of the  Buyer's  most  recent
     fiscal year (such amount being calculated in accordance with Rule 144A).

____ The Buyer is part of a Family of  Investment  Companies  which owned in the
     aggregate  $___________________  in  securities  (other  than the  excluded
     securities  referred  to below) as of the end of the  Buyer's  most  recent
     fiscal year (such amount being calculated in accordance with Rule 144A).

     3. The term "Family of  Investment  Companies"  as used herein means two or
more  registered  investment  companies  (or series  thereof) that have the same
investment  adviser or  investment  advisers that are  affiliated  (by virtue of
being majority owned  subsidiaries  of the same parent or because one investment
adviser is a majority owned subsidiary of the other).

     4. The term  "securities" as used herein does not include (i) securities of
issuers that are affiliated  with the Buyer or are part of the Buyer's Family of
Investment Companies, (ii) bank deposit notes and certificates of deposit, (iii)
loan  participations,  (iv)  repurchase  agreements,  (v)  securities  owned but
subject to a repurchase agreement and (vi) currency, interest rate and commodity
swaps.

     5. The Buyer is familiar  with Rule 144A and  understands  that each of the
parties to which this  certification  is made are relying  and will  continue to
rely on the  statements  made herein because one or more sales to the Buyer will
be in reliance on Rule 144A.  In addition,  the Buyer will only purchase for the
Buyer's own account.




                                      H-7
<PAGE>

     6.  The  undersigned  will  notify  each  of  the  parties  to  which  this
certification is made of any changes in the information and conclusions  herein.
Until such notice,  the Buyer's purchase of Rule 144A Securities will constitute
a reaffirmation of this  certification by the undersigned as of the date of such
purchase.



                               ____________________________________
                               Print Name of Buyer



                               By:_________________________________
                                  Name:
                                  Title:



                               IF AN ADVISER:



                               ____________________________________
                               Print Name of Buyer



                               Date:_______________________________



                                      H-8
<PAGE>



                                   EXHIBIT I-1

                    FORM OF TRANSFER AFFIDAVIT AND AGREEMENT

STATE OF             )

                     ) ss.:

COUNTY OF            )

     [NAME OF OFFICER], being first duly sworn, deposes and says:

     1. That he is [Title of Officer] of [Name of Owner]  (record or  beneficial
owner (the "Owner") of the Credit Suisse First Boston Mortgage Securities Corp.,
Trust  Certificate,  Series  200_-__,  Class R (the "Class R  Certificate")),  a
[savings  institution]  [corporation] duly organized and existing under the laws
of [the State of  _______________]  [the United  States],  on behalf of which he
makes this affidavit and agreement.

     2. That the Owner (i) is not and will not be a "disqualified  organization"
as of [date of  transfer]  within  the  meaning  of  Section  860E(e)(5)  of the
Internal  Revenue Code of 1986, as amended (the  "Code"),  (ii) will endeavor to
remain  other than a  disqualified  organization  for so long as it retains  its
ownership interest in the Class R Certificate and (iii) is acquiring the Class R
Certificate  for its own account or for the account of another  Owner from which
it has received an affidavit in  substantially  the same form as this  affidavit
and  agreement.  (For  this  purpose,  a  "disqualified  organization"  means an
electing large partnership under section 775 of the Code, the United States, any
state or political  subdivision thereof, or any agency or instrumentality of any
of the foregoing (other than an  instrumentality  all of the activities of which
are subject to tax and, except for the Federal Home Loan Mortgage Corporation, a
majority of whose board of directors  is not  selected by any such  governmental
entity), or any foreign government,  international organization or any agency or
instrumentality of such foreign  government or organization,  any rural electric
or telephone  cooperative,  or any  organization  (other than  certain  farmers'
cooperatives)  that is  generally  exempt  from  federal  income tax unless such
organization is subject to the tax on unrelated business taxable income).

     3.  That the  Owner  is aware  (i) of the tax  that  would  be  imposed  on
transfers of the Class R Certificate  to  disqualified  organizations  under the
Code,  that applies to all transfers of the Class R Certificate  after March 31,
1988;  (ii)  that such tax  would be on the  transferor  (or,  with  respect  to
electing  large  partnerships,  on such  partnership),  or, if such  transfer is
through an agent (which person  includes a broker,  nominee or middleman)  for a
disqualified  organization,  on the agent;  (iii) that the  person  (other  than
transfers with respect to electing large partnerships)  otherwise liable for the
tax shall be relieved of liability  for the tax if the  transferee  furnishes to
such person an affidavit that the transferee is not a disqualified  organization
and, at the time of transfer,  such person does not have actual  knowledge  that
the  affidavit  is  false;  and  (iv)  that  the  Class R  Certificate  may be a
"noneconomic   residual  interest"  within  the  meaning  of  proposed  Treasury
regulations  promulgated  pursuant  to the Code and  that  the  transferor  of a
noneconomic  residual interest will remain liable for any taxes due with respect
to the income of such residual  interest,  unless no significant  purpose of the
transfer was to impede the assessment or collection of tax.



                                     I-1-1
<PAGE>

     4. That the Owner is aware of the tax  imposed on a  "pass-through  entity"
holding the Class R Certificate if either the pass-through entity is an electing
large  partnership  under  Section  775 of the Code of if at any time during the
taxable  year of the  pass-through  entity a  disqualified  organization  is the
record holder of an interest in such entity.  (For this purpose, a "pass through
entity" includes a regulated  investment company, a real estate investment trust
or common trust fund, a partnership, trust or estate, and certain cooperatives.)

     5. That the Owner is aware that the Trustee  will not register the transfer
of a Class R  Certificate  unless the  transferee,  or the  transferee's  agent,
delivers to it an affidavit and agreement,  among other things, in substantially
the same form as this affidavit and agreement.  The Owner expressly  agrees that
it will not consummate any such transfer if it knows or believes that any of the
representations contained in such affidavit and agreement are false.

     6. That the Owner has  reviewed the  restrictions  set forth on the face of
the Class R  Certificate  and the  provisions  of  Section  4.02(g) of the Trust
Agreement  under which the Class R Certificate  was issued.  The Owner expressly
agrees to be bound by and to comply with such restrictions and provisions.

     7. The Owner warrants and represents that it is [a qualified  institutional
buyer as that term is defined in Rule 144A under the  Securities Act of 1933, as
amended]  [a person  involved in the  organization  of the issuer of the Class R
Certificate, or an affiliate, as defined in Rule 405 under the Securities Act of
1933, as amended, of such person].

     8. That the Owner consents to any additional  restrictions  or arrangements
that shall be deemed necessary upon advice of counsel to constitute a reasonable
arrangement to ensure that the Class R Certificate will only be owned,  directly
or indirectly, by an Owner that is not a disqualified organization.

     9.  The  Owner's  Taxpayer   Identification  Number  is  _________________.

     10. This  affidavit and  agreement  relates only to the Class R Certificate
held by the Owner and not to any other  holder of the Class R  Certificate.  The
Owner understands that the liabilities described herein relate only to the Class
R Certificate.

     11. That no purpose of the Owner  relating  to the  purchase of the Class R
Certificate by the Owner is or will be to impede the assessment or collection of
any tax.

     12. That the Owner has no present  knowledge or expectation that it will be
unable  to  pay  any  United  States  taxes  owed  by it so  long  as any of the
Certificates remain outstanding.  In this regard, the Owner hereby represents to
and for the benefit of the person from whom it acquired the Class R  Certificate
that the Owner  intends  to pay  taxes  associated  with  holding  such  Class R
Certificate  as they  become  due,  fully  understanding  that it may  incur tax
liabilities in excess of any cash flows generated by the Class R Certificate.

     13. That the Owner has no present  knowledge  or  expectation  that it will
become insolvent or subject to a bankruptcy  proceeding for so long as the Class
R Certificate remains outstanding.



                                     I-1-2
<PAGE>


     14. The Owner is a citizen or resident of the United States, a corporation,
partnership  or other entity  created or organized in, or under the laws of, the
United States or any political  subdivision thereof, or an estate or trust whose
income  from  sources  without  the  United  States is  includable  in gross (or
otherwise a domestic  partnership  pursuant to Treasury  Regulations) income for
United States federal income tax purposes  regardless of its connection with the
conduct of a trade or business within the United States.



                                     I-1-3
<PAGE>


     IN WITNESS WHEREOF,  the Owner has caused this instrument to be executed on
its behalf,  pursuant to the authority of its Board of Directors,  by its [Title
of Officer]  and its  corporate  seal to be hereunto  attached,  attested by its
[Assistant] Secretary, this __ day of __________, 20__.

                               [NAME OF OWNER]




                                By:________________________________
                                         [Name of Officer]
                                         [Title of Officer]
[Corporate Seal]

ATTEST:




_____________________________
[Assistant] Secretary

     Personally  appeared before me the above-named [Name of Officer],  known or
proved to me to be the same person who executed the foregoing  instrument and to
be the [Title of Officer] of the Owner,  and acknowledged to me that he executed
the same as his free act and deed and the free act and deed of the Owner.

     Subscribed and sworn before me this __ day of ______________________, 20__.



                                        _____________________________
                                        NOTARY PUBLIC

                                        COUNTY OF____________________
                                        STATE OF ____________________
                                        My Commission expires the ______ day of
                                        ____________, 20__.




                                     I-1-4
<PAGE>

                                   EXHIBIT I-2

                         Form of Transferor Certificate


                                           _____________, 20__

Credit Suisse First Boston Mortgage Securities Corp.
11 Madison Avenue
New York, New York 10010

[Trustee]

Attention:  Corporate Trust Administration

           Re:  Credit Suisse First Boston Mortgage Securities
                Corp., Trust Certificates, Series 200_-__,
                Class

Dear Sirs:

     This letter is  delivered  to you in  connection  with the transfer by (the
"Seller")  to  (the  "Purchaser")  of  a  ____%  Percentage  Interest  in  Trust
Certificates, Series 200_-___, Class R (the "Certificates"), pursuant to Section
4.02 of the Trust Agreement (the "Trust Agreement"), dated as of _________, 200_
among Credit Suisse First Boston  Mortgage  Securities  Corp., as depositor (the
"Depositor") and  _____________________,  as trustee (the "Trustee").  All terms
used herein and not  otherwise  defined shall have the meanings set forth in the
Trust Agreement.  The Seller hereby  certifies,  represents and warrants to, and
covenants with, the Depositor and the Trustee that:

     1. No purpose of the Seller  relating to transfer of the Certificate by the
Seller to the Purchaser is or will be to impede the  assessment or collection of
any tax.

     2. The Seller understands that the Purchaser has delivered to the Trustee a
transfer  affidavit and agreement in the form attached to the Trust Agreement as
Exhibit  I-1.  The  Seller  does not  know or  believe  that any  representation
contained therein is false.

     3. The Seller has no actual  knowledge that the proposed  Transferee is not
both a United States Person and a Permitted Transferee.

     4.  The  Seller  has at the time of the  transfer  conducted  a  reasonable
investigation  of the financial  condition of the Purchaser as  contemplated  by
Treasury  Regulations  Section  1.860E-1(c)(4)(i)  and,  as  a  result  of  that
investigation,  the Seller has  determined  that the Purchaser has  historically
paid its debts as they  become  due and has  found no  significant  evidence  to
indicate the Purchaser  will not continue to pay its debts as they become due in
the future.  The Seller understands that the transfer of the Class R Certificate
may not be respected  for United  States income tax purposes (and the Seller may
continue  to be liable for United  States  income  taxes  associated  therewith)
unless the Seller has conducted such an investigation.



                                     I-2-1
<PAGE>

                                    Very truly yours,





                                    _____________________________
                                    (Seller)




                                    By:__________________________
                                       Name:
                                       Title:




                                     I-2-2
<PAGE>

                                TABLE OF CONTENTS

                                                                          Page


ARTICLE I    DEFINITIONS...................................................1

             Section 1.01. Defined Terms...................................1

ARTICLE II   CONVEYANCE OF THE UNDERLYING CERTIFICATES;
             ORIGINAL ISSUANCE OF TRUST CERTIFICATES......................14

             Section 2.01. Conveyance of the Underlying Certificates......14

             Section 2.02. Issuance of Trust Certificates.................16

             Section 2.03. Miscellaneous REMIC Provisions.................16

ARTICLE III  ADMINISTRATION OF THE UNDERLYING CERTIFICATES;
             PAYMENTS AND REPORTS TO CERTIFICATEHOLDERS...................17

             Section 3.01. Administration of the Trust Fund and the
                           Underlying Certificates........................17

             Section 3.02. Collection of Monies...........................19

             Section 3.03. Establishment of Trust Certificate Account;
                           Deposits in Trust Certificate Account..........19

             Section 3.04. Permitted Withdrawals From the Trust
                           Certificate Account............................20

             Section 3.05. Distributions..................................20

             Section 3.06. Statements to Certificateholders...............23

             Section 3.07. Access to Certain Documentation and
                           Information....................................24

             Section 3.08. Permitted Investments..........................24

             Section 3.09. Sale of Defective Assets.......................25

             Section 3.10. Modification of Underlying Certificates........25

ARTICLE IV   THE TRUST CERTIFICATES.......................................25

             Section 4.01. The Certificates...............................25

             Section 4.02. Registration of Transfer and Exchange of
                           Certificates...................................27

             Section 4.03. Mutilated, Destroyed, Lost or Stolen
                           Certificates...................................31

             Section 4.04. Persons Deemed Owners..........................31

ARTICLE V    THE TRUSTEE..................................................31

             Section 5.01. Duties of Trustee..............................31

             Section 5.02. Certain Matters Affecting the Trustee..........33

             Section 5.03. Trustee Not Liable for Certificates or
                           Underlying Certificates........................34

             Section 5.04. Trustee May Own Certificates...................34

             Section 5.05. Eligibility Requirements for Trustee...........34

             Section 5.06. Resignation and Removal of the Trustee.........35



                                       i
<PAGE>


                                TABLE OF CONTENTS
                                   (continued)
                                                                          Page

             Section 5.07. Successor Trustee..............................35

             Section 5.08. Merger or Consolidation of Trustee.............36

             Section 5.09. Appointment of Co-Trustee or Separate
                           Trustee........................................36

             Section 5.10. Appointment of Office or Agency................37

             Section 5.11. Compliance with Withholding Requirements.......37

ARTICLE VI   TERMINATION..................................................38

             Section 6.01. Termination....................................38

             Section 6.02. Additional Termination Requirements............39

ARTICLE VII  THE DEPOSITOR................................................39

             Section 7.01. Liability of the Depositor.....................39

             Section 7.02. Merger, Consolidation or Conversion of
                           the Depositor..................................39

             Section 7.03. Limitation on Liability of the Depositor
                           and Others.....................................40

ARTICLE VIII MISCELLANEOUS PROVISIONS.....................................41

             Section 8.01. Amendment......................................41

             Section 8.02. Counterparts...................................42

             Section 8.03. Limitation on Rights of Certificateholders.....42

             Section 8.04. Governing Law..................................43

             Section 8.05. Notices........................................43

             Section 8.06. Notices to the Rating Agency...................44

             Section 8.07. Severability of Provisions.....................44

             Section 8.08. Successors and Assigns.........................44

             Section 8.09. Article and Section Headings...................44

             Exhibit A      Form of Class A Certificate

             Exhibit B      Form of Class M Certificate

             Exhibit C      Form of Class B Certificate

             Exhibit D      Form of Class R Certificate

             Exhibit E      Underlying Certificate and Underlying
                            Agreement Schedule

             Exhibit F      Form of Investor Representation Letter

             Exhibit G      Form of Transferor Representation Letter

             Exhibit H      Form of Rule 144A Investment Representation

             Exhibit I-1    Form of Transfer Affidavit and Agreement

             Exhibit I-2    Form of Transferor Certificate



                                      ii

                                                   Exhibit 5.1

                      [ORRICK, HERRINGTON & SUTCLIFFE LLP]



                                 May 23, 2000

Credit Suisse First Boston Mortgage Securities Corp.
11 Madison Avenue
New York, New York  10010


Ladies and Gentlemen:

      At your request, we have examined the Registration  Statement on Form S-3,
to be filed by Credit Suisse First Boston Mortgage  Securities Corp., a Delaware
corporation (the  "Registrant"),  with the Securities and Exchange Commission on
May  23,  2000  (the  "Registration   Statement"),   in  connection  with  the
registration  under the  Securities  Act of 1933,  as amended  (the  "Act"),  of
Conduit Mortgage and Manufactured  Housing  Contract  Pass-Through  Certificates
(the "Certificates"). The Certificates are issuable in series (each, a "Series")
under either a separate Pooling and Servicing  Agreement,  among the Registrant,
as depositor,  the servicer named in the  prospectus  supplement and the trustee
named  in the  prospectus  supplement  (each  such  agreement,  a  "Pooling  and
Servicing Agreement") or a separate Trust Agreement,  between the Registrant, as
depositor  and  the  trustee  named  in the  prospectus  supplement  (each  such
agreement, a "Trust Agreement").  The Certificates of each Series are to be sold
as set forth in the  Registration  Statement,  any  amendment  thereto,  and the
prospectus and prospectus supplement relating to such Series.

      We have  examined  such  instruments,  documents  and records as we deemed
relevant and necessary as a basis of our opinion hereinafter expressed.  In such
examination,  we have assumed the following:  (a) the  authenticity  of original
documents  and the  genuineness  of all  signatures;  (b) the  conformity to the
originals  of all  documents  submitted  to us as  copies;  and (c)  the  truth,
accuracy and  completeness of the  information,  representations  and warranties
contained  in the  records,  documents,  instruments  and  certificates  we have
reviewed.

      Based  on  such  examination,   we  are  of  the  opinion  that  when  the
Certificates of such Series have been duly executed, authenticated and delivered
in  accordance  with the  Pooling and  Servicing  Agreement  or Trust  Agreement
relating to such Series and sold, the Certificates will be legally issued, fully
paid,  binding  obligations  of the trust  created by the Pooling and  Servicing
Agreement or Trust Agreement, as applicable, and the holders of the Certificates
will be entitled to the benefits of the Pooling and  Servicing  Agreement or the
Trust Agreement, as applicable,  except as enforcement thereof may be limited by
applicable  bankruptcy,  insolvency,  reorganization,   arrangement,  fraudulent
conveyance,  moratorium,  or other laws  relating to or affecting  the rights of
creditors  generally  and  general  principles  of  equity,   including  without
limitation,  concepts  of  materiality,  reasonableness,  good  faith  and  fair
dealing,  and the possible  unavailability of specific performance or injunctive
relief,  regardless of whether such enforceability is considered in a proceeding
in equity or at law.

      We hereby  consent  to the  filing of this  opinion  as an  exhibit to the
Registration  Statement  and to the use of our name  wherever  appearing  in the
Registration  Statement and the  prospectus  contained  therein.  In giving such
consent,  we do not consider  that we are  "experts,"  within the meaning of the
term as used in the Act or the rules and  regulations of the  Commission  issued
thereunder,  with respect to any part of the Registration  Statement,  including
this opinion as an exhibit or otherwise.

                                Very truly yours,

                               /s/ Orrick, Herrington & Sutcliffe LLP

                               ORRICK, HERRINGTON & SUTCLIFFE LLP



                                   Exhibit 8.1

                      [ORRICK, HERRINGTON & SUTCLIFFE LLP]

                                 May 23, 2000


Credit Suisse First Boston Mortgage Securities Corp.
11 Madison Avenue
New York, NY 10010

Ladies and Gentlemen:

      We have advised Credit Suisse First Boston Mortgage  Securities Corp. (the
"Registrant")  with respect to federal income tax aspects of the issuance by the
Registrant  of  its  Conduit   Mortgage  and   Manufactured   Housing   Contract
Certificates  (the  "Certificates"),  issuable in series (each, a "Series").  In
connection  therewith we have  prepared the  description  of federal  income tax
consequences  to holders of the  Certificates  that  appears  under the  heading
"Material Federal Income Tax Consequences" in the prospectus (the  "Prospectus")
forming  a part of the  Registration  Statement  on Form S-3 (the  "Registration
Statement") filed on May 23, 2000 with the Securities and Exchange  Commission
(the "Commission")  under the Securities Act of 1933, as amended (the "Act"). In
our opinion,  such discussion is a discussion of the material federal income tax
consequences of purchasing,  holding and disposing of the Certificates (and also
includes a discussion of certain minor and incidental  consequences as well). In
our opinion,  to the extent the  description of the material  federal income tax
consequences  of  purchasing,  holding and  disposing of the  Certificates  is a
discussion of law or legal conclusions,  such description is true and correct in
all material respects.  To the extent that such discussion explicitly states our
opinion,  we hereby confirm and adopt such opinion herein.  In our opinion:  (1)
with  respect to each Series of REMIC  certificates  (issued as described in the
Prospectus),  the related  mortgage pool (or portion thereof) will be classified
as one or more "real estate mortgage investment  conduits" ("REMICs") and not an
association  taxable as a corporation (or publicly traded partnership treated as
a  corporation)  and each class of  Certificates  will  represent a "regular" or
"residual"  interest  in a  REMIC,  (2) with  respect  to each  Series  of FASIT
certificates  (issued as  described  in the  Prospectus),  the related  pool (or
portion   thereof)  will  be  classified  as  one  or  more   "financial   asset
securitization   trusts"  ("FASITs")  and  not  an  association   taxable  as  a
corporation (or publicly traded  partnership  treated as a corporation) and each
class of Certificates  will represent a "regular"  interest in a FASIT,  and (3)
with  respect to each other Series of  Certificates  (issued as described in the
Prospectus),  the related trust fund will be a grantor trust for federal  income
tax purposes and not an association taxable as a corporation (or publicly traded
partnership treated as a corporation) and each holder will be treated as holding
an equity interest in such grantor trust.

      You should be aware that the discussion under "Material Federal Income Tax
Consequences" in the Prospectus is intended as an explanatory  discussion of the
consequences  of holding  the  Certificates  generally  and does not  purport to
furnish  information in the level of detail or with the investor's  specific tax
circumstances  that  would  be  provided  by  an  investor's
<PAGE>

own tax advisor.  Accordingly,  the Prospectus  indicates that it is recommended
that each prospective  investor  consult with its own tax advisor  regarding the
application  of United  States  federal  income  tax law,  as well as any state,
local, foreign or other tax laws, to their particular situations.

      You  should be aware that this  opinion  applies  to the  Certificates  as
described in the  Registration  Statement.  The  Prospectus  indicates that with
respect to each Series of Certificates,  Registrant's  then current counsel will
be identified in the related prospectus supplement and, if such counsel is other
than Orrick, Herrington & Sutcliffe LLP, will confirm (modify or supplement) the
aforementioned opinions.

      In reaching the  conclusions  set forth herein,  we have reviewed,  relied
upon, and assumed full  compliance  with the Pooling and Servicing  Agreement or
Trust  Agreement  and such other  documents  that we have  deemed  necessary  or
appropriate as a basis for the opinion contained  herein.  With your permission,
we have  further  assumed  the  following:  (a)  the  authenticity  of  original
documents  and the  genuineness  of all  signatures;  (b) the  conformity to the
originals of all documents  submitted to us as copies; (c) the truth,  accuracy,
and  completeness  of the  information,  representations  and warranties made in
conferences or contained in the records, documents, instruments and certificates
we have reviewed; (d) the due authorization,  execution,  and delivery on behalf
of the respective parties thereto of documents referred to herein and the legal,
valid and binding  effect  thereof on such  parties;  and (e) the absence of any
agreements or  understandings  among any other parties not  contemplated  by the
aforementioned  transaction documents.  As to any facts material to this opinion
which  we did  not  independently  establish  or  verify,  we have  relied  upon
statements  and  representations  of officers and other  representatives  of the
Registrant and others.

      We express no  opinion  as to the law of any  jurisdiction  other than the
federal income tax laws of the United States of America.

      We hereby  consent  to the  filing of this  opinion  as an  exhibit to the
Registration  Statement  and to the use of our name  wherever  appearing  in the
Registration  Statement and the Prospectus contained therein, as supplemented by
the prospectus  supplement relating to a Series of Certificates.  In giving such
consent,  we do not consider  that we are  "experts,"  within the meaning of the
term as used in the Act or the rules and  regulations of the  Commission  issued
thereunder,  with respect to any part of the Registration Statement,  (including
this opinion) as an exhibit or otherwise.

                               Very truly yours,

                               /s/ Orrick, Herrington & Sutcliffe LLP
                               ______________________________________

                               ORRICK, HERRINGTON & SUTCLIFFE LLP





                                  Exhibit 23.1

          Included as part of Exhibit 5.1 and Exhibit 8.1






                                                                    Exhibit 24.1


                                POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS,  that each person whose  signature  appears
below  constitutes  and appoints  Patrick D.  Coleman,  William  Pitofsky,  Greg
Petroski  and  Kari  Roberts  or  any  of  them,  his or  her  true  and  lawful
attorneys-in-fact   and   agents,   with   full   power  of   substitution   and
resubstitution,  for him or her and his or her name, place and stead, in any and
all  capacities,  to sign  any and all  amendments  (including  post-  effective
amendments)  to this  Registration  Statement,  and to file the  same,  with all
exhibits  thereto,  and  other  documents  in  connection  therewith,  with  the
Securities  and  Exchange  Commission,  granting to said  attorneys-in-fact  and
agents,  and each of them, with or without the others,  full power and authority
to do and perform  each and every act and thing  requisite  and  necessary to be
done in and about the premises, as fully to all intents and purposes as he might
or  could  do  in  person,   hereby  ratifying  and  confirming  all  that  said
attorneys-in-fact  and agents, or any of them, or their or his substitutes,  may
lawfully do or cause to be done by virtue hereof.

           Signature                     Title                          Date
           ---------                     -----                          ----


 /s/ Patrick D. Coleman             Director and President         May 23, 2000
- - - - - - - - ---------------------------         (Principal Executive
PATRICK D. COLEMAN                  Officer)



 /s/ Scott J. Ulm                   Director and Chairman          May 23, 2000
- - - - - - - - --------------------------          of the Board
SCOTT J. ULM


 /s/ William Pitofsky               Director                       May 23, 2000
- - - - - - - - ---------------------------         and Vice President
WILLIAM PITOFSKY


 /s/ Carlos Onis                    Director                       May 23, 2000
- - - - - - - - ---------------------------
CARLOS ONIS


 /s/ Zev Kindler                    Treasurer                      May 23, 2000
- - - - - - - - ----------------------------        (Principal Financial Officer)
ZEV KINDLER


 /s/ Thomas Zingalli                 Vice President                May 23, 2000
- - - - - - - - ---------------------------          and Controller
THOMAS ZINGALLI                      (Principal Accounting Officer)




                                                                   Exhibit 24.2

                        ASSISTANT SECRETARY'S CERTIFICATE


           I, Rhonda  Matty,  Assistant  Secretary of Credit Suisse First Boston
Mortgage  Securities  Corp.,  hereby  certify  that the copy of the  resolutions
attached hereto is a true,  correct and complete copy of resolutions  adopted by
the Board of Directors of Credit Suisse First Boston Mortgage  Securities  Corp.
by  unanimous  written  consent  in  lieu  of a  meeting  on May 8,  2000.  Such
resolutions  have not been  amended  or  modified  and are now in full force and
effect in the form attached.

           IN WITNESS  WHEREOF,  I have  hereunto set my hand on as of this 16th
day of May, 2000.



                                        /s/ Rhonda Matty
                                        --------------------------
                                         Assistant Secretary


<PAGE>

              CREDIT SUISSE FIRST BOSTON MORTGAGE SECURITIES CORP.

                     UNANIMOUS WRITTEN CONSENT OF DIRECTORS

                    IN LIEU OF MEETING OF BOARD OF DIRECTORS

                                   May 8, 2000

      The  undersigned,  being all the  Directors of Credit  Suisse First Boston
Mortgage  Securities  Corp., a Delaware  corporation (the "Company"),  do hereby
onsent in writing that the following  resolutions shall have the same force and
effect as if adopted at a Meeting of the Board of Directors of the Company:

           RESOLVED, that the form of Registration Statement on Form S-3, as set
forth as Exhibit A attached  hereto,  together  with all  exhibits  thereto (the
"Registration  Statement"),  to  be  filed  with  the  Securities  and  Exchange
Commission  (the   "Commission")  for  the  purpose  of  registering  under  the
Securities Act of 1933, as amended,  up to  $1,500,000,000  aggregate  principal
amount of  conduit  mortgage  and  manufactured  housing  contract  pass-through
certificates (the  "Certificates"),  which will be offered in one or more series
(each, a "Series"),  representing  fractional undivided interests in trusts (the
"Trusts") to be created by the Company be, and it hereby is, approved; and it is

           FURTHER RESOLVED,  that the directors and appropriate officers of the
Company be, and each of them hereby is,  authorized  and empowered to execute on
their own behalf,  or in the name and on behalf of the Company,  or both, as the
case may be, the Registration  Statement,  and any and all amendments (including
post-effective  amendments) to the Registration Statement,  including amendments
to the prospectus (the  "Prospectus")  and the addition or amendment of exhibits
or  other  documents  relating  thereto  or  required  by law or  regulation  in
connection  therewith,  in such form as such  directors  and  officers  may deem
necessary,  appropriate or desirable in order to effect the  registration of the
Certificates;  and that the appropriate  officers of the Company be, and each of
them  hereby  is,  authorized  and  empowered  to  procure  all other  necessary
signatures to the Registration Statement and to cause the Registration Statement
and such amendment or amendments,  so executed, to be filed with the Commission;
and it is

           FURTHER   RESOLVED,   that  prior  to  the  effective   date  of  the
Registration Statement or any post-effective  amendment thereto, the appropriate
officers of the Company are  directed to use their best  efforts to furnish each
director  and  each  officer   signing  the   Registration   Statement  or  such
post-effective  amendment  with a copy of the  Registration  Statement,  or such
post-effective   amendment,   and  if,  prior  to  the  effective  date  of  the
Registration  Statement  or  such  post-effective  amendment,  material  changes
therein or material  additions  thereto are proposed to be made, the appropriate
officers of the Company are  directed to use their best  efforts to furnish each
director,   and  each  officer  signing  the  Registration   Statement  or  such
post-effective  amendment,  with a copy of the  Registration  Statement and each
amendment thereto or such post-effective amendment as filed with the Commission,
or a description of such changes or additions,  or a combination  thereof, in as
complete and final form as  practicable  and in  sufficient  time to

<PAGE>

permit each  director and each such officer so desiring to object to any part of
the Registration  Statement or such  post-effective  amendment before it becomes
effective; and it is

           FURTHER  RESOLVED,  that each  officer or director who is required or
entitled  to execute  the  Registration  Statement  (whether  in the name and on
behalf of the Company, or as an officer or director of the Company, or both) be,
and each of them  hereby  is,  authorized  and  empowered  to execute a power of
attorney appointing William Pitofsky, Patrick D. Coleman, Greg Petroski and Kari
Roberts, as attorneys-in-fact, with full power of substitution severally, (a) to
execute  (individually and in each capacity in which such officer or director is
required or entitled to execute the  Registration  Statement,  including  in the
name  of and on  behalf  of the  Company)  the  Registration  Statement  and all
amendments (including  post-effective  amendments) to the Registration Statement
and documents in connection therewith, which amendments may make such changes in
the Registration Statement as the attorney-in-fact  acting in the premises deems
appropriate,  and (b) to cause the Registration Statement and any such amendment
or amendments to the Registration  Statement,  so executed, to be filed with the
Commission,  each of said  attorneys  to have power to act with or  without  the
others,  and to have full power and  authority to do and perform in the name and
on behalf of each of said  officers and directors who shall have executed such a
power of attorney,  every act whatsoever which such attorneys or any of them may
deem necessary,  appropriate or desirable to be done in connection  therewith as
fully and to all intents and  purposes as such  officers or  directors  might or
could do in person; and it is

           FURTHER RESOLVED,  that Thomas Zingalli,  Vice President,  Controller
and Principal  Accounting Officer of the Company, be and he hereby is, appointed
the  agent of the  Company  for  service  in  connection  with the  Registration
Statement; and it is

           FURTHER RESOLVED, that the Chairman, President,  Principal Accounting
Officer and Controller, Treasurer, any Vice President, Director of Taxes and any
other  officer  specifically  authorized by the Board of Directors in writing of
the  Company  (the  "Authorized  Officers"),  the  Secretary  or  any  Assistant
Secretary of the Company be, and each of them with full authority to act without
the others,  hereby is, authorized and directed in the name and on behalf of the
Company  to take  any and all  action  that  he or she  may  deem  necessary  or
advisable in order to obtain a permit,  register or qualify the Certificates for
issuance  and  sale  or  to  request  an  exemption  from  registration  of  the
Certificates,  to  register  or obtain a license  for the Company as a dealer or
broker under the  securities  laws of such of the states of the United States of
America or other  jurisdictions,  including  Canada,  as such  officer  may deem
advisable,  and  in  connection  with  such  registration,   permits,  licenses,
qualifications and exemptions to execute, acknowledge,  verify, file and publish
all such applications,  reports,  issuer's covenants,  resolutions,  irrevocable
consents to service of process, powers of attorney and other papers, agreements,
documents  and  instruments  as may be  deemed by such  officer  to be useful or
advisable to be filed, and that the Board of Directors hereby adopts the form of
any and all resolutions  required by any such state authority in connection with
any such applications,  reports,  issuer's  covenants,  irrevocable  consents to
service of process, powers of attorney and other papers,  agreements,  documents
and  instruments  if (i) in the  opinion of the officer of the Company so acting
the  adoption  of such  resolutions  is  necessary  or  advisable  and  (ii) the
Secretary or any Assistant  Secretary of the Company  evidences such adoption by
filing with this Unanimous  Written  Consent copies of such  resolutions,  which
shall  thereupon  be  deemed  to be

                                       2
<PAGE>

adopted by the Board of Directors and  incorporated  in this  Unanimous  Written
Consent as part of this resolution with the same force and effect as if included
herein,  and  that the  Authorized  Officers,  the  Secretary  or any  Assistant
Secretary  of the  Company  take any and all  further  action that they may deem
necessary or advisable in order to maintain such  registration  in effect for as
long as they may deem to be in the best interests of the Company; and it is

           FURTHER  RESOLVED,  that it is in the best  interests  of the Company
that the  Certificates  be qualified or registered  for sale in various  states,
that the Authorized  Officers,  the Secretary or any Assistant  Secretary of the
Company  and its  counsel  are  authorized  to  determine  the  states  in which
appropriate  action  shall be taken to qualify or register  for sale all or such
part of the  Certificates  as said  Authorized  Officers,  the  Secretary or any
Assistant Secretary may deem advisable, that said Authorized Officers, Secretary
or any  Assistant  Secretary  are hereby  authorized to perform on behalf of the
Company any and all such acts as they may deem  necessary  or advisable in order
to  comply  with the  applicable  laws of any  such  states,  and in  connection
therewith to execute and file all requisite papers and documents, including, but
not limited to, applications,  reports,  surety bonds,  irrevocable consents and
appointments  of  attorneys  for service of process,  and the  execution by such
Authorized  Officers,  Secretary or any Assistant Secretary of any such paper or
document or the  performance by them of any act in connection with the foregoing
matters shall  conclusively  establish their authority therefor from the Company
and the approval and  ratification by the Company of the papers and documents to
be executed and the action so taken; and it is

           FURTHER  RESOLVED,  that the Company,  as  depositor  or settlor,  is
authorized and empowered to enter into various Trust Agreements  (each, a "Trust
Agreement") with such bank, trust company or other financial  institution as the
directors  or  Authorized  Officers  shall deem  necessary  or  appropriate,  as
trustee,  pursuant to which certain trusts will be created, in the form included
in the  Registration  Statement,  together  with  such  changes,  modifications,
insertions and additions as the proper  officers of the Company deem  necessary,
appropriate  or desirable and to sell the  beneficial  interests of such trusts;
and it is

           FURTHER  RESOLVED,  that the Company,  as  depositor  or settlor,  is
authorized and empowered to enter into various Pooling and Servicing  Agreements
(each,  a "Pooling and Servicing  Agreement")  with such bank,  trust company or
other financial institution,  as trustee, and such servicer, as the directors or
Authorized  Officers  shall deem necessary or  appropriate,  with respect to the
Certificates,  in the form included in the Registration Statement, together with
such  changes,  modifications,  insertions  and  additions  as the  directors or
Authorized  Officers  of  the  Company  shall  deem  necessary,  appropriate  or
desirable; and it is

           FURTHER  RESOLVED,  that the Company is  authorized  and empowered to
enter into various Underwriting  Agreements (each, an "Underwriting  Agreement")
with Credit Suisse First Boston Corporation,  as underwriter, or an underwriting
syndicate   represented   by  Credit   Suisse  First  Boston   Corporation,   as
underwriters,  with regard to the Certificates,  or such other purchasers as may
be approved by an Authorized  Officer,  in the form included in the Registration
Statement, together with such changes,  modifications,  insertions and additions
as the  directors or Authorized  Officers of the Company  shall deem  necessary,
appropriate or desirable; and it is

                                       3
<PAGE>

           FURTHER  RESOLVED,  that the Company is  authorized  and empowered to
enter into various Sale and Purchase  Agreements or similar  agreements (each, a
"Purchase  Agreement")  with a seller of mortgage  loans,  manufactured  housing
conditional  sales contracts or other assets to be included in a trust fund with
respect to a Series as the directors or Authorized Officers shall deem necessary
or  appropriate  with respect to the  Certificates,  in the form included in the
Registration Statement,  together with such changes,  modifications,  insertions
and additions as the directors or Authorized  Officers of the Company shall deem
necessary, appropriate or desirable; and it is

           FURTHER RESOLVED, that the Authorized Officers of the Company, in the
name and on behalf of the Company be, and each of them hereby is, authorized and
empowered  to execute and  deliver a Trust  Agreement,  a Pooling and  Servicing
Agreement, a Purchase Agreement and an Underwriting Agreement with regard to any
Series of  Certificates,  with such  changes  therein as may be  approved by the
Authorized  Officers  executing the same, and to take such action and to execute
such further  instruments and documents as any of the aforesaid  officers of the
Company  may  deem  to be  necessary,  appropriate  or  desirable  in  order  to
consummate the  transactions  contemplated by a Trust  Agreement,  a Pooling and
Servicing Agreement,  a Purchase Agreement and an Underwriting  Agreement,  such
other instruments and documents being in such form and containing such terms and
conditions as the  Authorized  Officers of the Company  executing the same shall
approve; and it is

           FURTHER  RESOLVED,  that the  preparation of a prospectus  supplement
(the "Prospectus  Supplement")  relating to the Certificates of a Series, in the
form  included  in the  Registration  Statement  or in  such  other  form  as an
Authorized  Officer  of  the  Company  shall  deem  necessary,   appropriate  or
desirable,  and the use of such  Prospectus  Supplement  and the  Prospectus  in
connection  with  the  sale  of the  Certificates  offered  thereby,  is  hereby
approved; and it is

           FURTHER RESOLVED,  that the Authorized  Officers of this Company,  on
behalf of any Trust be, and they hereby are,  authorized  and  directed to cause
the  Certificates  to be  issued,  sold  and  delivered  to the  underwriter  or
underwriters,  or to such other  purchasers  as may be approved by an Authorized
Officer,  as the  case  may be,  and to cause  the  Certificates  to be rated by
Standard & Poor's Ratings Group,  Moody's Investors  Service,  Inc., Fitch IBCA,
Inc. or another nationally recognized rating agency; and it is

           FURTHER  RESOLVED,  that  execution of any  agreement,  instrument or
document by an Authorized  Officer of the Company pursuant to these  resolutions
shall constitute  conclusive evidence of the approval of, and of that Authorized
Officer's authority to execute, such agreement,  instrument or document;  and it
is

           FURTHER  RESOLVED,  that the  retention  of the law  firm of  Orrick,
Herrington  &  Sutcliffe  LLP as counsel to the Company in  connection  with the
proposed public offerings be and it hereby is, approved; and it is

           FURTHER RESOLVED,  that the Authorized  Officers of the Company,  and
its counsel be, and each of them hereby is,  authorized  with full  authority to
act without  the other to


                                       4
<PAGE>

appear  on  behalf  of the  Company  or the  Trusts  before  the  Commission  in
connection  with any matter  relating to the  Registration  Statement and to any
amendments thereto.

      IN WITNESS WHEREOF, the undersigned Directors have executed this Unanimous
Written Consent this 8th day of May, 2000.

         /s/ Carlos Onis                       /s/ Scott J. Ulm
        ----------------                      -------------------
          Carlos Onis                           Scott J. Ulm

         /s/ William Pitofsky                /s/  Patrick  D. Coleman
        ---------------------               -------------------------
        William Pitofsky                      Patrick D. Coleman








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