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EXHIBIT 4.1 POOLING AND SERVICING AGREEMENT

Pooling and Servicing Agreement

EXHIBIT 4.1 POOLING AND SERVICING AGREEMENT | Document Parties: CITICORP MORTGAGE SECURITIES, INC | CITIMORTGAGE, INC | U.S. BANK NATIONAL ASSOCIATION | CITIBANK, N.A You are currently viewing:
This Pooling and Servicing Agreement involves

CITICORP MORTGAGE SECURITIES, INC | CITIMORTGAGE, INC | U.S. BANK NATIONAL ASSOCIATION | CITIBANK, N.A

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Title: EXHIBIT 4.1 POOLING AND SERVICING AGREEMENT
Governing Law: New York     Date: 5/15/2006

EXHIBIT 4.1 POOLING AND SERVICING AGREEMENT, Parties: citicorp mortgage securities  inc , citimortgage  inc , u.s. bank national association , citibank  n.a
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                                              CITICORP MORTGAGE SECURITIES, INC.
                                                                       Depositor

                                                              CITIMORTGAGE, INC.
                                                     Servicer and Master Servicer

                                                  U.S. BANK NATIONAL ASSOCIATION
                                                                         Trustee

                                                                   CITIBANK, N.A.
                                             Paying Agent, Certificate Registrar
                                                        and Authenticating Agent

--------------------------------------------------------------------------------
                                                 POOLING AND SERVICING AGREEMENT
                                             CITICORP MORTGAGE SECURITIES, INC.,
                                                 REMIC PASS-THROUGH CERTIFICATES,
                                                                   SERIES 2006-2
--------------------------------------------------------------------------------

                                                                    April 1, 2006

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CONTENTS

PARTIES                                                                         9

BACKGROUND                                                                      9

AGREEMENT                                                                        9

SERIES TERMS                                                                    9

12 THE SERIES                                                                   9
   12.1   Establishment                                                           9
   12.2   General terms for classes                                             10
   12.3   Target rate                                                           12
   12.4   Ratio-stripped IO and PO classes                                       12
   12.5   Loss limits                                                           12
   12.6   Denominations                                                         12
   12.7   The mortgage loans                                                    13
   12.8   Right to repurchase                                                   13
   12.9   Book-entry and definitive certificates                                13
   12.10 Voting interests                                                      13
   12.11 Cash deposit                                                          13

13 PRINCIPAL BALANCES                                                          13
   13.1   Class balances                                                        13
   13.2   Certificate balances                                                  14

14 ALLOCATIONS                                                                 14
   14.1   Interest allocations                                                  14
   14.2   Principal allocations                                                  14
   14.3   Unscheduled principal                                                 15
   14.4   Maintenance of subordination                                          16

15 ALLOCATIONS AMONG THE SENIOR CLASSES                                         16
   15.1   Order of allocation among senior target-rate classes                  16
   15.2   NAS classes                                                           17
   15.3   PAC and TAC classes                                                    17

16 DISTRIBUTIONS                                                               17
   16.1   Types of distributions                                                17
   16.2   Accrual and accrual directed classes                                   18
   16.3   Distribution priorities                                               18
   16.4   Distributions to certificate holders                                  19
   16.5   Final distribution on the residual certificates                       19
   16.6   Wire transfer eligibility                                             19

17 ADJUSTMENTS TO CLASS BALANCES                                               19

18 LOSS RECOVERIES                                                             20

19 ADDITIONAL STRUCTURING FEATURES                                             21

20 LIBOR CLASSES                                                               21

21 COMPOSITE AND COMPONENT CLASSES                                             22

22 MULTIPLE-POOL SERIES                                                         22
   22.1   Adjustment of subordinated component class principal balances         22
   22.2   Maintenance of subordination                                          24
   22.3   Distribution shortfalls                                                24
   22.4   Undersubordination                                                    25
   22.5   Undercollateralization                                                25
   22.6   Non-subordinated interest shortfalls                                   26

23 SUPER SENIOR CLASSES                                                        27

24 RETAIL CLASSES                                                              27

25 INSURED CLASSES                                                              27

26 ADVANCE ACCOUNT                                                             27

27 REMIC PROVISIONS                                                            27
   27.1   Constituent REMICs                                                     27
   27.2   The class P and class L regular interests                             28
   27.3   Distributions to class P and class L regular interests                28
   27.4   REMIC accounts and distributions                                      30
   27.5   Tax matters person                                                    31


                                        2

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28 YIELD MAINTENANCE AGREEMENT                                                 32

29 NOTICE ADDRESSES                                                             32

30 INITIAL DEPOSITORIES                                                        33

STANDARD TERMS                                                                 34

  1 DEFINITIONS AND USAGES                                                       34
    1.1   Defined terms                                                         34
    1.2   Usages                                                                49
    1.3   Calculations respecting mortgage loans                                 50

  2 TRANSFER OF MORTGAGE LOANS AND ISSUANCE OF CERTIFICATES; REPURCHASE AND
      SUBSTITUTION                                                             50
    2.1   Transfer of mortgage loans                                            50
    2.2   CMSI's representations and warranties                                 54
    2.3   Repurchase or substitution of mortgage loans                          56

  3 SERVICING                                                                   58
    3.1   CitiMortgage as servicer and master servicer                          58
    3.2   Collections                                                           59
    3.3   Certificate and other accounts                                        60
    3.4   Prepayment interest shortfalls                                        62
    3.5   Advances                                                              62
    3.6   Distributions                                                         65
    3.7   Third-party servicing                                                  67
    3.8   Permitted withdrawals from certificate account                        68
    3.9   Expenses                                                              69
   3.10   Primary mortgage insurance                                             70
   3.11   Hazard insurance                                                      70
   3.12   Realization on defaulted mortgage loans                               71
   3.13   Release of mortgage files                                              73
   3.14   Reports to certificate holders and others                             73
   3.15   Tax returns and reports                                               75
   3.16   Application of buydown funds                                          76
    3.17   Assumption and modification agreements                                76
   3.18   Refinancings and curtailments; loan modifications                     77
   3.19   Investment accounts                                                   78
   3.20   Paying Agent and Certificate Registrar                                81
   3.21   Exchange Act reporting                                                82

  4 CITIMORTGAGE                                                                83
    4.1   Liability of CitiMortgage and others                                  83
    4.2   Assumption of CitiMortgage's obligations by affiliate                 83
    4.3   Maintenance of office or agency                                       84
    4.4   Servicer not to resign                                                 84
    4.5   Delegation of duties                                                  84
    4.6   Errors and omissions insurance                                        84

  5 THE CERTIFICATES                                                             84
    5.1   The certificates                                                      84
    5.2   Registration of transfer and exchange of certificates                 86
    5.3   Mutilated, destroyed, lost or stolen certificates                      89
    5.4   Persons deemed owners                                                 89
    5.5   Access to list of certificate holders' names and addresses            90
    5.6   Definitive certificates                                                90
    5.7   Notices to Clearing Agency                                            90

  6 [RESERVED]                                                                  91

  7 DEFAULT                                                                     91
    7.1   Events of Default                                                     91
    7.2   Trustee to act; appointment of successor                              92

  8 THE TRUSTEE                                                                 92
    8.1   Duties                                                                 92


                                        3

<PAGE>

    8.2   Liability                                                             93
    8.3   Trustee not liable for certificates or mortgage loans                 94
    8.4   Trustee may own certificates                                          94
    8.5   Trustee's fees and expenses                                           94
    8.6   Eligibility requirements for Trustee                                   95
    8.7   Resignation or removal of Trustee                                     96
    8.8   Successor trustee                                                     96
    8.9   Merger or consolidation of Trustee                                    97
   8.10   Appointment of co-trustee or separate trustee                         97
   8.11   Tax returns                                                           98
   8.12   Appointment of authenticating agent                                   98

  9 TERMINATION                                                                 100
   9.1    Termination upon repurchase by CMSI or liquidation of all
         mortgage loans                                                       100

10 GENERAL PROVISIONS                                                          102
   10.1   Amendments                                                           102
   10.2   Recordation of Agreement                                             103
   10.3   Limitation on rights of certificate holders                           103
   10.4   Governing law                                                        104
   10.5   Maintenance of REMICs                                                104
   10.6   Notices                                                               104
   10.7   Severability of provisions                                           104
   10.8   Assignment                                                           104
   10.9   Certificates nonassessable and fully paid                            104

11 DEPOSITORIES                                                               104
   11.1   Depositories                                                         104

SIGNATURES AND ACKNOWLEDGMENTS                                                  1

SCHEDULE 1: SERVICING CRITERIA TO BE ADDRESSED IN REPORT ON ASSESSMENT OF
            COMPLIANCE

APPENDIX 1: TRANSFEREE'S AFFIDAVIT

EXHIBIT A: FORMS OF CERTIFICATES                                              A-1

EXHIBIT B: MORTGAGE LOAN SCHEDULES

EXHIBIT C: FORM OF MORTGAGE DOCUMENT CUSTODIAL AGREEMENT                      C-1

EXHIBIT D: FORM OF PURCHASER LETTER                                           D-1

EXHIBIT E: FORM OF ERISA LETTER                                               E-1

EXHIBIT F: YIELD MAINTENANCE AGREEMENTS                                       F-1


                                       4

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DEFINED TERMS

accrual class,                                                                 18
accrual directed class,                                                         18
accrual termination day,                                                       34
advance account,                                                               27
advance account advances,                                                       27
advance account available advance amount,                                      27
advance account depository,                                                    27
advance account depository agreement,                                          27
advance account funding date,                                                  27
advance account trigger date,                                                  27
affiliate,                                                                     34
affiliated mortgage loans,                                                     58
affiliated Paying Agent advances,                                              64
affiliated servicing fee rate,                                                 34
Agent,                                                                          86
aggregate outstanding advances,                                                34
allocated loss,                                                                20
alternative certificate account,                                               105
alternative custodial accounts for P&I,                                       105
alternative escrow account,                                                   105
alternative servicing account,                                                 105
applicable constituent REMIC,                                                  27
appraisal,                                                                     34
Authenticating Agent, 10,                                                       98
Authorized Officer,                                                            34
Bankruptcy Code,                                                               34
bankruptcy coverage termination date,                                           34
bankruptcy loss,                                                               34
bankruptcy loss limit,                                                         34
beneficial owner,                                                              35
book-entry certificates,                                                       13
business day,                                                                  35
buydown account,                                                               35
buydown funds,                                                                  35
buydown mortgage loan,                                                         35
buydown subsidy agreement,                                                     35
certificate account,                                                            60
certificate holder,                                                            35
certificate insurance policy,                                                  27
certificate rate,                                                               10
Certificate Register,                                                          86
Certificate Registrar,                                                         10
certificates,                                                                    9
Citibank banking affiliate,                                                    35
CitiMortgage,                                                                   9
class,                                                                          35
class B-x,                                                                      9
class B-x certificates,                                                         9
class IA-IO,                                                                    9
class IA-IO certificates,                                                       9
class IA-PO,                                                                    9
class IA-PO certificates,                                                       9
class IA-x,                                                                      9
class IA-x certificates,                                                        9
class IIA-1,                                                                    9
class IIA-1 certificates,                                                        9
class IIA-IO,                                                                   9
class IIA-IO certificates,                                                      9
class IIA-PO,                                                                    9
class IIA-PO certificates,                                                      9
class IIIA-1,                                                                   9
class IIIA-1 certificates,                                                       9
class IIIA-IO,                                                                  9
class IIIA-IO certificates,                                                     9
class IIIA-PO,                                                                   9
class IIIA-PO certificates,                                                     9
class L regular interest,                                                      28
class LR certificates,                                                          9
class P regular interests,                                                     28
class percentage,                                                              35
class PR certificates,                                                          9
class R certificates,                                                          10
classes A-x through A-y,                                                       36
classes B-x through B-y,                                                       36
Clearing Agency,                                                                36
Clearing Agency Participant,                                                   36
closing date,                                                                  10
CMSI,                                                                            9
collected servicing fee,                                                       36
component classes,                                                             22
composite class,                                                                22
constituent REMIC,                                                             27
corporate trust office,                                                        32
cumulative loss test,                                                           15
current interest allocation,                                                   14
custodial accounts for P&I,                                                    61
custodial investment account,                                                  79
cut-off date,                                                                   9
debt service reduction,                                                        36
deficient valuation,                                                           36
definitive certificates,                                                       13
delegated servicer,                                                            36

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delinquency test,                                                              15
denominations,                                                                 12
Depository,                                                                    36
determination date,                                                            37
discount loan,                                                                  37
disqualified organization,                                                     86
distribution account,                                                          65
distribution day,                                                               10
distribution day statement,                                                    66
distribution report,                                                           73
Eligible Account,                                                               37
Eligible Investments,                                                          79
eligible substitute mortgage loan,                                             57
ERISA,                                                                          37
ERISA Prohibited holder,                                                       87
ERISA Restricted Certificates,                                                 37
escrow accounts,                                                               61
Events of Default,                                                             90
Exchange Act,                                                                  37
extraordinary event,                                                           37
FDIC,                                                                           37
FHLMC,                                                                         37
Fitch,                                                                         37
fraud loss,                                                                     38
fraud loss limit,                                                              37
Furnished Document,                                                            93
GIC,                                                                            38
GNMA,                                                                          38
group, 22,                                                                     38
group target-rate class percentage,                                             38
Guide,                                                                         38
high-cost mortgage loan,                                                       38
holder,                                                                         38
hypothetical mortgage loan,                                                    38
impaired subordination level,                                                  16
independent accountants,                                                        38
Indirect Participant,                                                          38
initial,                                                                       38
initial bankruptcy loss limit,                                                 12
initial fraud loss amount,                                                     12
initial special hazard loss limit,                                             12
insurance premium,                                                             27
insurance proceeds,                                                             38
insured class,                                                                 27
Insurer,                                                                       27
interest allocation,                                                            14
interest allocation carryforward,                                              14
interest distribution,                                                         17
interest portion of a liquidated loan loss,                                     39
interest portion of a realized loss,                                           46
Internal Revenue Code,                                                         38
investment account,                                                             38
Investment Income,                                                             39
IO class,                                                                      39
IO loan,                                                                        39
IO strip,                                                                      39
last scheduled distribution day,                                               10
latest possible maturity date,                                                 10
LIBOR,                                                                         21
LIBOR accrual period,                                                          21
LIBOR classes,                                                                 21
liquidated loan,                                                                39
liquidated loan loss,                                                          39
liquidation expenses,                                                          39
liquidation proceeds,                                                           39
loss recovery,                                                                 40
lower-tier REMIC,                                                              27
lower-tier REMIC account,                                                       30
master servicer,                                                               58
master servicing fee,                                                          40
master servicing fee rate,                                                      40
material breach,                                                               56
MERS,                                                                          51
month,                                                                          40
monthly affiliated servicing fee rate,                                         34
monthly master servicing fee rate,                                             40
monthly pass-through rate,                                                     43
monthly third-party servicing fee rate,                                        49
Moody's,                                                                       40
mortgage,                                                                      40
Mortgage Document Custodial Agreement,                                         51
Mortgage Document Custodian,                                                   51
mortgage documents,                                                            40
mortgage file,                                                                  40
mortgage loan,                                                                 40
mortgage loan schedule,                                                        40
mortgage note,                                                                  40
Mortgage Note Custodian,                                                       40
mortgage note rate,                                                            40
mortgaged property,                                                             40
mortgagor,                                                                     40
multiple-pool series,                                                          40
NAS class,                                                                      17
net liquidation proceeds,                                                      40
net Paying Agent advances,                                                     41
net REO proceeds,                                                              40
net voluntary advances,                                                        41
non-accelerated senior class,                                                  17
nonrecoverable advance,                                                        41
non-subordinated losses,                                                       41


                                        6

<PAGE>

non-supported prepayment interest shortfall,                                   41
notional balance,                                                               13
officer's certificate,                                                         41
opinion of counsel,                                                            41
order of seniority,                                                             41
order of subordination,                                                        41
original value,                                                                41
Originator,                                                                    42
outstanding,                                                                   42
overcollateralized,                                                            25
PAC class,                                                                     17
Participant,                                                                   43
pass-through rate,                                                             43
Paying Agent,                                                                  10
Paying Agent failure,                                                           27
Paying Agent failure advance,                                                  27
percentage interest,                                                           43
person,                                                                         43
planned amortization class,                                                    17
PO class,                                                                      43
PO loan,                                                                        43
PO strip,                                                                      43
pool,                                                                          43
pool distribution amount,                                                       43
pool I,                                                                        22
pool II,                                                                       22
pool III,                                                                       22
pooling REMIC,                                                                 27
pooling REMIC account,                                                         30
predatory lending law,                                                         44
Predecessor Certificates,                                                      44
premium loan,                                                                  44
prepayment interest shortfall,                                                 44
primary mortgage insurance certificate,                                        44
principal allocation,                                                          14
principal balance,                                                             13
principal distribution,                                                         17
principal portion of a liquidated loan loss,                                   39
principal portion of a realized loss,                                          46
principal prepayment,                                                           44
private certificates,                                                          44
Proceeding,                                                                    44
property protection expenses,                                                   44
Purchaser,                                                                     10
Qualified GIC,                                                                 44
Qualified Nominee,                                                              45
rating agency,                                                                 10
ratio-stripped IO class,                                                       45
ratio-stripped IO loan,                                                        45
ratio-stripped PO class,                                                       46
ratio-stripped PO loan,                                                        46
realized losses,                                                               46
record date,                                                                    46
reduction amount,                                                              25
regular interests,                                                             27
Regulation AB,                                                                  82
reimbursement,                                                                 18
relevant servicer,                                                             46
Relieved interest,                                                              64
REMIC,                                                                         46
REMIC Provisions,                                                              46
remittance delinquency,                                                         63
remittances on affiliated mortgage loans,                                      60
remittances on third-party loans,                                              62
REO loan,                                                                       46
REO proceeds,                                                                  46
REO property,                                                                  46
Required Amount of Certificates,                                               46
reserve fund,                                                                  27
residual certificates,                                                          9
residual distribution,                                                         18
residual interest,                                                             28
Responsible Officer,                                                           46
retail class,                                                                  27
retail reserve fund,                                                            27
S&P,                                                                           46
scheduled monthly loan payment,                                                46
scheduled principal balance,                                                    47
scheduled principal payments,                                                  47
scheduled servicing fee,                                                       47
Securities Act,                                                                 47
senior classes,                                                                 9
senior to,                                                                     47
Series Terms,                                                                    9
servicing account advances,                                                    62
servicing accounts,                                                            61
Servicing Officer,                                                             47
Similar Law,                                                                   88
single certificate,                                                            47
single-pool series,                                                            47
special hazard loss,                                                           47
special hazard loss limit,                                                     48
special hazard percentage,                                                     48
special serviced mortgage loans,                                               58
special servicer,                                                              58
special servicing agreement,                                                   58
Standard Terms,                                                                  9
startup day,                                                                   10
subordinate to,                                                                48
subordinated classes,                                                            9


                                       7

<PAGE>

subordinated losses,                                                           48
subordination depletion date,                                                  48
subordination level,                                                           16
substitution adjustment amount,                                                57
substitution day,                                                              57
super senior classes,                                                           27
super senior support classes,                                                  27
TAC class,                                                                     17
target rate,                                                                    12
targeted amortization class,                                                   17
target-rate class,                                                             12
target-rate class percentage,                                                   48
target-rate loan,                                                              48
target-rate strip,                                                             48
tax matters person,                                                             31
third-party mortgage loans,                                                    58
third-party Paying Agent advance,                                              64
third-party servicer,                                                          58
third-party servicer advance,                                                  63
third-party servicing agreement,                                               58
third-party servicing fee,                                                     48
third-party servicing fee rate,                                                48
Transfer Instrument,                                                           49
Trust,                                                                          9
Trust Fund,                                                                     49
Trustee,                                                                        9
U.S. person,                                                                   49
uncommitted cash,                                                               49
uncommitted cash advances,                                                     63
undercollateralized,                                                           25
undersubordination,                                                             25
Underwriter,                                                                   10
unscheduled principal payments,                                                49
upper-tier REMIC,                                                               27
upper-tier REMIC account,                                                      30
voluntary advance,                                                             63
voting interest,                                                                13
yield maintenance agreement,                                                   31
yield maintenance payments,                                                    32
yield maintenance provider,                                                    32


                                        8

<PAGE>

POOLING AND SERVICING AGREEMENT

April 1, 2006

PARTIES

o     CITICORP MORTGAGE SECURITIES, INC., a Delaware corporation (CMSI)

o     CITIMORTGAGE, INC., a New York corporation (CitiMortgage)

o     U.S. BANK NATIONAL ASSOCIATION, a national banking association, in its
     individual capacity and as Trustee

o     CITIBANK, N.A., a national banking association, in its individual capacity
     and as Paying Agent, Certificate Registrar, and Authenticating Agent

BACKGROUND

In the regular course of their business, affiliates of CMSI originate and
acquire mortgage loans. CMSI, CitiMortgage and the Trustee wish to set forth the
terms and conditions under which the Trust will acquire the mortgage loans
listed in exhibit B, certificates will be issued to holders evidencing ownership
interests in the Trust Fund, and CitiMortgage will manage and service the
mortgage loans.

AGREEMENT

This Pooling and Servicing Agreement (this agreement) consists of sections 1
through 11 (the Standard Terms) and sections 12 and following (the Series
Terms). The Standard Terms follow the Series Terms. If there is a conflict or
inconsistency between the Standard Terms and the Series Terms, the Series Terms
will prevail.

SERIES TERMS

12     THE SERIES

12.1 ESTABLISHMENT

A common law trust is established under New York law as of April 1, 2006 (the
cut-off date, to be called the "Citicorp Mortgage Securities Trust, Series
2006-2" (the Trust). CMSI is the settlor of the Trust, and U.S. Bank National
Association is the trustee (in such capacity, the Trustee).

     The Trust will issue a series of certificates designated as "Citicorp
Mortgage Securities, Inc. REMIC Pass-Through Certificates, Series 2006-2"). The
certificates will consist of and be further designated as

     (i) 25 senior classes of certificates individually designated as

o     for each integer x, from 1 through 17, inclusive, "Senior Class IA-x
     Certificates" (the class IA-x certificates or class IA-x);

o     "Senior Class IIA-1 Certificates" (the class IIA-1 certificates or class
     IIA-1);

o     "Senior Class IIIA-1 Certificates" (the class IIIA-1 certificates or class
     IIIA-1);

o     "Senior Class IA-IO Certificates" (the class IA-IO certificates or class
     IA-IO);

o     "Senior Class IIA-IO Certificates" (the class IIA-IO certificates or class
     IIA-IO);

o     "Senior Class IIIA-IO Certificates" (the class IIIA-IO certificates or
     class IIIA-IO);

o     "Senior Class IA-PO Certificates" (the class IA-PO certificates or class
     IA-PO);

o     "Senior Class IIA-PO Certificates" (the class IIA-PO certificates or class
     IIA-PO); and

     "Senior Class IIIA-PO Certificates" (the class IIIA-PO certificates or
class IIIA-PO);

     (ii) six subordinated classes of certificates designated, for each integer
x, from 1 through 6, inclusive, as "Subordinated Class B-x Certificates" (the
class B-x certificates or class B-x) (together with the senior classes of
certificates, the certificates); and

     (iii) three residual interests individually designated as

o     "Class PR Certificates" (the class PR certificates,

o     "Class LR Certificates" (the class LR certificates, and

o     "Class R Certificates" (the class R certificates.


                                         9

<PAGE>

     The class PR, LR and R certificates together constitute the residual
certificates.

     The Trustee hereby appoints Citibank, N.A. as Authenticating Agent.

     CMSI, with the approval of the Trustee, hereby appoints the corporate trust
department of Citibank, N.A. as Paying Agent and Certificate Registrar.

     The Mortgage Document Custodian is Citibank (West), FSB.

     The Underwriter and the Purchaser for the series is HSBC Securities (USA)
Inc.

     The certificates will be first executed, authenticated and delivered on
April 27, 2006 (the closing date). The closing date will also be the startup
day.

     The 25th day of each month (or if the 25th is not a business day, the next
succeeding business day), beginning in May 2006, will be a distribution day. The
last scheduled distribution day for each class is specified in the following
table. The latest possible maturity date of each class for purposes of section
860G(a)(1) of the Internal Revenue Code and Treasury Regulations section
1.860G-1(a)(4)(iii) will be April 25, 2036.

     The nationally recognized statistical rating agencies for the senior
classes are Moody's and Fitch, and the rating agency for classes B-1 through B-5
is Fitch.

12.2 GENERAL TERMS FOR CLASSES

      The classes will have the following initial principal balances, certificate
rates, and for the subordinated classes, initial target-rate class percentages
and initial subordination levels:

<TABLE>
<CAPTION>
                             initial         certificate         initial             initial
                          principal (or       rate (per     target-rate class     subordination     last scheduled
class                    notional) balance      annum)          percentage (1)       level (2)      distribution day
---------------------    -----------------    -----------    -----------------    --------------    ----------------
<S>                        <C>                   <C>                 <C>                <C>          <C>
IA-1                       $ 20,000,000.00       5.75%               N/A                N/A          April 25, 2036
IA-2                       $   5,252,566.00       6.00%               N/A                N/A          April 25, 2036
IA-3                       $ 53,090,169.00         (3)               N/A                N/A          April 25, 2036
IA-4                       $108,090,169.00         (3)               N/A                N/A          April 25, 2036
                            (notional)(4)
IA-5                       $ 55,000,000.00         (3)                N/A                N/A          April 25, 2036
IA-6                       $     652,174.00          0%               N/A                N/A          April 25, 2036
IA-7                       $ 92,635,837.00       5.75%               N/A                N/A           April 25, 2036
IA-8                       $ 15,454,333.00       5.75%               N/A                N/A          April 25, 2036
IA-9                       $     999,600.00       5.75%               N/A                N/A          April 25, 2036
IA-10                       $ 31,507,513.00       5.75%               N/A                N/A          April 25, 2036
IA-11                      $   3,750,000.00       6.00%               N/A                N/A          April 25, 2036
IA-12                      $   3,750,000.00       6.00%               N/A                N/A          April 25, 2036
IA-13                      $   3,750,000.00       6.00%               N/A                N/A          April 25, 2036
IA-14                      $   1,875,000.00       5.50%               N/A                N/A          April 25, 2036
IA-15                      $   1,875,000.00       6.50%               N/A                N/A          April 25, 2036
IA-16                      $ 35,250,561.00       5.75%               N/A                N/A          April 25, 2036
IA-17                       $     228,373.00          0%               N/A                N/A          April 25, 2036
IA-PO                      $   2,180,431.00          0% (5)           N/A                N/A          April 25, 2036
IA-IO                      $286,868,870.49         (7)               N/A                N/A          April 25, 2036
                            (notional)(6)

IIA-1                      $ 54,950,155.00       5.50%               N/A                N/A          April 25, 2021
IIA-PO                     $     687,381.00          0% (5)           N/A                N/A          April 25, 2021
IIA-IO                     $ 44,295,654.49         (8)               N/A                N/A          April 25, 2021
                            (notional)(6)

</TABLE>


                                        10

<PAGE>

<TABLE>
<CAPTION>
                             initial         certificate          initial           initial
                          principal (or       rate (per     target-rate class     subordination     last scheduled
class                    notional) balance      annum)          percentage (1)       level (2)      distribution day
---------------------    -----------------    -----------    -----------------    --------------    ----------------
<S>                        <C>                   <C>            <C>                <C>                <C>
IIIA-1                     $ 26,289,136.00        5.5%               N/A                N/A          March 25, 2036
IIIA-PO                    $     238,106.00          0% (5)           N/A                 N/A          March 25, 2036
IIIA-IO                    $ 21,684,059.94         (9)               N/A                N/A          March 25, 2036
                            (notional)(6)
B-1 (composite)            $   6,953,545.00      Blended        1.662250646850%    1.200000581747%    April 25, 2036
   IB-1 (component)        $   5,558,054.35       5.75%         1.660749795610%          N/A                N/A
   IIB-1 (component)       $     944,950.55       5.50%         1.670044944937%          N/A                N/A
    IIIB-1 (component)      $     450,540.09       5.50%         1.664515480671%          N/A                N/A

B-2 (composite)            $   1,896,422.00      Blended        0.453341237628%    0.750000470075%    April 25, 2036
   IB-2 (component)        $   1,515,833.51       5.75%         0.452931914425%          N/A                N/A
   IIB-2 (component)       $     257,713.87       5.50%         0.455466956001%          N/A                N/A
   IIIB-2 (component)      $     122,874.61       5.50%         0.453958919786%           N/A                N/A

B-3 (composite)            $   1,264,281.00      Blended        0.302227412068%    0.450000474723%    April 25, 2036
   IB-3 (component)        $   1,010,555.41       5.75%         0.301954530005%          N/A                N/A
   IIB-3 (component)       $     171,809.20       5.50%         0.303644557277%          N/A                N/A
   IIIB-3 (component)      $      81,916.39       5.50%         0.302639200065%          N/A                N/A

B-4 (composite)            $     632,141.00      Blended         0.151113825560%    0.300000358403%    April 25, 2036
   IB-4 (component)        $     505,278.10       5.75%         0.150977384420%          N/A                N/A
   IIB-4 (component)       $      85,904.67       5.50%         0.151822398724%          N/A                 N/A
   IIIB-4 (component)      $      40,958.23       5.50%         0.151319719721%          N/A                N/A

B-5 (composite)            $     632,141.00      Blended        0.151113825560%    0.150000242083%    April 25, 2036
   IB-5 (component)        $      505,278.10       5.75%         0.150977384420%          N/A                N/A
   IIB-5 (component)       $      85,904.67       5.50%         0.151822398724%          N/A                N/A
   IIIB-5 (component)      $      40,958.23       5.50%         0.151319719721%          N/A                N/A

B-6 (composite)            $     632,141.00      Blended        0.151113825560%          N/A          April 25, 2036
   IB-6 (component)        $     505,278.10       5.75%         0.150977384420%          N/A                N/A
   IIB-6 (component)       $      85,904.67       5.50%         0.151822398724%          N/A                N/A
   IIIB-6 (component)      $      40,958.23       5.50%         0.151319719721%          N/A                N/A
</TABLE>

----------
(1)   The initial target-rate class percentages are:

               senior target-rate classes:    97.128839223138%
       group I senior target-rate classes:    97.131431606700%
      group II senior target-rate classes:    97.115376345613%
     group III senior target-rate classes:    97.124927240315%
                     subordinated classes:     2.871160776862%

(2)   The initial subordination level for the senior classes is 2.850000437536%.

(3)   The annual interest rates for the first LIBOR accrual period of April 25,
     2006 through May 24, 2006, the formulas for the annual interest rates
     subsequent to the first LIBOR accrual period, and the maximum and minimum
     annual interest rates for each LIBOR and inverse LIBOR class are as
     follows:

              |    |    Annual interest rate


                                       11

<PAGE>

<TABLE>
<CAPTION>
          LIBOR accrual
         period beginning      For first       Formula for subsequent
Class           date          accrual period       accrual periods        Maximum    Minimum
-----    -----------------    --------------    ----------------------    -------    -------
<S>      <C>                    <C>                   <C>                   <C>       <C>
IA-3     25th day of month            5.27%           LIBOR + 0.45%         5.75%*    0.45%
IA-4     25th day of month      0.42911656%           5.2% - LIBOR**        5.2%**       0%
IA-5     25th day of month            5.37%           LIBOR + 0.55%         5.75%*    0.55%
</TABLE>

     * Classes IA-3 and IA-5 will benefit from two yield maintenance agreements
     with The Bank of New York that may provide additional payments to holders
     of class IA-3 certificates for distribution days for which LIBOR is greater
     than 5.3% and to holders of class IA-5 certificates for distribution days
     for which LIBOR is greater than 5.2%.

     ** If LIBOR is less than 5.3% for a distribution day, class IA-4 will
     receive additional interest distributions for that distribution day equal
     to a percentage rate per annum equal to the excess of 5.3% over LIBOR, but
     not more than 0.1%, on the principal balance of class IA-3. Class IA-4 may
     also receive additional interest distributions under the yield management
     agreements.

(4)   The notional balance of class IA-4 on any distribution day will equal the
     sum of the principal balances of classes IA-3 and IA-5 on that distribution
     day.

(5)   Classes IA-PO, IIA-PO and IIA-PO are ratio-stripped PO classes and do not
     bear interest

(6)   Classes IA-IO, IIA-IO and IIIA-IO are ratio-stripped IO classes and have no
     principal balance.

(7)   The certificate rate for class IA-IO for each month will equal the weighted
     average pass-through rate of the premium loans in Group I on the last day
     of that month, minus the target-rate. The initial certificate rate for
     class IA-IO is expected to be 0.3619731039% per annum.

(8)   The certificate rate for class IIA-IO for each month will equal the
     weighted average pass-through rate of the premium loans in Group II on the
     last day of that month, minus the target-rate. The initial certificate rate
     for class IIA-IO is expected to be 0.1888023506% per annum.

(9)   The certificate rate for class IIIA-IO for each month will equal the
     weighted average pass-through rate of the premium loans in Group III on the
     last day of that month, minus the target-rate. The initial certificate rate
     for class IIIA-IO is expected to be 0.1597923703% per annum.

12.3 TARGET RATE

The per annum target rates for the pools are
     pool I:      5.75%
     pool II:     5.50%
     pool III:    5.50%

     Each class other than any ratio-stripped IO or ratio-stripped PO class is a
target-rate class.

12.4 RATIO-STRIPPED IO AND PO CLASSES

Each of classes IA-IO, IIA-IO and IIIA-IO, is a ratio-stripped IO class. The
class IA-IO, IIA-IO and IIIA-IO certificates are private certificates.

     Each of classes IA-PO, IIA-PO and IIIA-PO is a ratio-stripped PO class.

12.5 LOSS LIMITS

     There is no initial special hazard loss limit.

     There is no initial bankruptcy loss limit.

     There is no initial fraud loss amount.

12.6 DENOMINATIONS

The denominations of

o     the senior class certificates and the class B-1 through B-3 certificates
     are initial principal (or, for any IO classes, notional) balances of $1,000
     and any whole dollar amount above $1,000,

o     the class B-4, B-5 and B-6 certificates are $100,000 initial principal
     balance and any larger integral multiple of $1,000, and

o     the residual certificates are percentage interests summing to 100%.

     If the initial principal or notional balance of a class is not a permitted
denomination for a certificate of that class, one certificate


                                       12

<PAGE>

of the class may be issued in a different denomination.

12.7 THE MORTGAGE LOANS

The mortgage loans in the Trust Fund are identified on the mortgage loan
schedule. The mortgage loans in

o     pool I will consist primarily of 30-year fixed-rate conventional one- to
     four-family mortgage loans,

o     pool II will consist primarily of 12- to 15-year fixed-rate conventional
     one- to four-family mortgage loans,

o     pool III will consist primarily of 30-year fixed-rate conventional one- to
     four-family mortgage loans originated through corporate relocation
     programs,

12.8 RIGHT TO REPURCHASE

CMSI cannot exercise its right to repurchase the mortgage loans pursuant to
section 9.1(a) of the Standard Terms unless

o     the aggregate scheduled principal balance of the mortgage loans is less
     than $42,142,700.66 at the time of repurchase, and

o     if there is an insured class outstanding and the exercise of such
     repurchase right would result in a draw under any certificate insurance
     policy, the Insurer has previously consented.

12.9 BOOK-ENTRY AND DEFINITIVE CERTIFICATES

All senior class certificates (other than certificates of a ratio-stripped IO
class that are private certificates) and the class B-1 through and B-6
certificates will be issued as book-entry certificates. Book-entry certificates
for a class or a group of classes will be represented by one or more
certificates issued in the name of a depository. Any ratio-stripped IO class
certificates that are private certificates, and the residual certificates will
be issued in fully registered certificated form (definitive certificates).

12.10 VOTING INTERESTS

Each IO class will have a 1% voting interest. The remaining voting interest will
be allocated to the other classes in proportion to their principal balances. The
voting interest of any class will be allocated among the certificates of the
class in proportion to the certificates' principal or notional balances, except
that an Insurer will be entitled to the voting interest of an insured class for
as long as the insured class is outstanding and the Insurer is not in default..

12.11 CASH DEPOSIT

No cash will be deposited into the certificate account on the closing date.

13    PRINCIPAL BALANCES

13.1 CLASS BALANCES

Each class that is not an IO class will have a principal balance, and each IO
class will have a notional balance. The principal or notional balance of
multiple classes (e.g., the senior classes) is the aggregate of the principal or
notional balances of those classes.

     The initial principal or notional balance for each class is stated in "The
series - General terms for classes" above. The principal balance of each class
that is not an IO class will be adjusted on each distribution day, as described
in "Adjustments to class balances" below.

     The notional balance of a ratio-stripped IO class for any day after the
initial distribution day will equal the aggregate of the principal balances for
that day of the hypothetical mortgage loans in its IO strip.

     The notional balance of each IO class that is not a ratio-stripped IO class
will be adjusted on each distribution day as described in "The series - General
terms for classes" above.


                                       13

<PAGE>

13.2 CERTIFICATE BALANCES

The sum of the initial principal or notional balances stated on the certificates
of each class will equal the initial principal or notional balance of the class.

     Except as may be provided in "Retail classes" below, the principal or
notional balance of each certificate will equal its proportional share, based on
the initial principal or notional balances stated on the certificates of the
class, of the principal balance or notional balance of the class to which the
certificate belongs.

14    ALLOCATIONS

14.1 INTEREST ALLOCATIONS

Beginning on the cut-off date, each class (other than any PO class) will accrue
interest for each month on its principal or notional balance at the certificate
rate for the class stated in "The series - General terms for classes" above. In
calculating accrued interest,

o     a class's principal or notional balance on the last day of a month will be
     considered to be the class's principal or notional balance on every day of
     the month, and

o     interest for a month will be calculated at 1/12 of the certificate rate,
     regardless of the number of days in the month.

     Example: Suppose that on January 1, a class has a principal balance of
$1,020,000 and a certificate rate of 6% per annum. On the January distribution
day, the class's principal balance is reduced by $20,000. As a result, the
principal balance of the class on January 31 is $1 million. Then the interest
accrued for the class during January (which is paid on the February distribution
day) is 1/12 of 6% of $1 million = $5,000; that the principal balance of the
class was greater than $1 million before the January distribution day, and that
January has 31 days, are irrelevant.

     A class's interest allocation for a distribution day is the sum of

o     the class's current interest allocation for the distribution day,
     consisting of the class's accrued interest for the preceding month minus
     the class's proportional share, based on accrued interest, of (1) any
     non-supported prepayment interest shortfall, and (2) the interest portion
     of any non-subordinated losses, for the preceding month,

o     plus any excess of the class's interest allocation for the preceding
     distribution day over the interest distributed to the class on that
     preceding distribution day (the interest allocation carryforward from that
     distribution day). (If the class is an insured class, for purposes of
     calculating allocations and distributions to the class, the interest
     allocation carryforward from a distribution day will be reduced by any
     payments to the class from the Insurer relating to the interest allocation
     carryforward, but will not be so reduced for purposes of effecting the
     Insurer's subrogation rights relative to the interest portion of any
      insured payment.)

14.2 PRINCIPAL ALLOCATIONS

The principal allocation for a distribution day is:

     (a) for any ratio-stripped PO class, the sum for that distribution day of
scheduled and unscheduled principal payments on its PO strip for that
distribution day.

     (b) for the senior target-rate classes collectively, the sum for that
distribution day of

o     the target-rate class percentage for the senior target-rate classes of
     scheduled principal payments on the target-rate strip, and

o     all unscheduled principal payments on the target-rate strip allocated to
     the senior target-rate classes pursuant to " - Unscheduled principal"
     below.

     The principal allocation for the senior target-rate classes will be
allocated among


                                        14

<PAGE>

the individual senior target-rate classes pursuant to "Allocations among the
senior classes" below.

     (c) for each subordinated class,

o     the class's target-rate class percentage of scheduled principal payments on
     the target-rate strip for that distribution day,

o     plus the class's proportional share, based on the principal balances of the
     subordinated classes, of unscheduled principal payments on the target-rate
     strip for that distribution day that are not allocated to the senior
     target-rate classes pursuant to the preceding paragraph (b),

o     plus or minus any amounts that are reallocated to or from the class
     pursuant to "- Maintenance of subordination" below.

14.3 UNSCHEDULED PRINCIPAL

For each distribution day, the following percentage of unscheduled principal
payments on the target-rate strip received during the preceding month will be
allocated to the senior target-rate classes:

o     100% if the target-rate class percentage for all the senior target-rate
     classes on the distribution day exceeds the initial target-rate class
     percentage for all the senior target-rate classes.

o     otherwise, and subject to the following proviso, the sum of (1) the
     target-rate class percentage for the senior target-rate classes, plus (2)
     the following percentage of the target-rate class percentage for the
     subordinated classes:

  DISTRIBUTION DAYS    PERCENTAGE
-------------------------------
   1 through   60         100%
  61 through   72          70%
  73 through   84          60%
  85 through   96          40%
  97 through 108          20%
   109 and after           0%

provided, that

o     if the distribution day is one on which the percentage shown in the
     preceding table is to be reduced - that is, the 61st, 73rd, 85th 97th or
     109th distribution day - and either the cumulative loss test or the
     delinquency test described below are not satisfied, then the percentage
     will not be reduced on that distribution day or on any subsequent
     distribution day until both the cumulative loss and delinquency tests are
     passed, and

o     if the cumulative loss test is not satisfied for a distribution day, the
     percentage of unscheduled principal payments allocated to the senior
     target-rate classes will be the greater of the percentage of unscheduled
     principal payments allocated to the senior target-rate classes for that
     distribution day calculated in accordance with the preceding rules of this
      section, or the percentage of unscheduled principal payments allocated to
     the senior target-rate classes for the preceding distribution day.

     The cumulative loss test is satisfied for a distribution day if cumulative
realized losses through that distribution day do not exceed the following
percentages of the initial principal balance of the subordinated classes:

                       PERCENTAGE OF
                     INITIAL PRINCIPAL
                         BALANCE OF
                         SUBORDINATED
  DISTRIBUTION DAYS        CLASSES
--------------------------------------
  61 through   72             30%
  73 through   84             35%
  85 through   96             40%
  97 through 108             45%
   109 and after             50%

     The delinquency test is satisfied for a distribution day if CitiMortgage
certifies to the Trustee that the average of the aggregate scheduled principal
balance of mortgage loans delinquent 60 days or more (including, for this
purpose, mortgage loans in foreclosure and real estate owned by the


                                       15

<PAGE>

Trust as a result of mortgagor default) for that distribution day and the
preceding five distribution days is either (1) less than 50% of the average of
the principal balance of the subordinated classes for those distribution days,
or (2) less than 2% of the average scheduled principal balance of all of the
mortgage loans for those distribution days.

     If there are composite and component subordinated classes, only the
composite subordinated classes are considered in the cumulative loss and
delinquency tests.

14.4 MAINTENANCE OF SUBORDINATION

The subordination level for a class (other than a ratio-stripped IO class) is
the sum of the class percentages of all classes that are subordinate to that
class. If a class's subordination level on the day before a distribution day is
less than the class's initial subordination level, then the class will have an
impaired subordination level on that distribution day.

     If a subordinated class has an impaired subordination level on a
distribution day, then all principal originally allocated to the subordinated
classes will be allocated to the most senior of the subordinated classes with an
impaired subordination level and to those subordinated classes that are senior
to the impaired class, in proportion to their principal balances, up to those
classes' principal balances, and any remainder will be allocated to the
remaining subordinated classes, in order of seniority, up to those classes'
principal balances.

     Example: Suppose that on a distribution day, (a) each of classes B-1
through B-6 had a principal balance on the preceding day of $1,000, (b) the
aggregate principal allocation to the subordinated classes is $3,120, and (c)
class B-2 has an impaired subordination level. Then on that distribution day

     (1) the entire amount allocated to the subordinated classes will be
allocated to classes B-1 and B-2, in proportion to their principal balances, up
to their principal balances, and

     (2) $1,000 of the remaining $1,120 will be allocated to class B-3, reducing
its principal balance to zero, and

     (3) the remaining $120 will be allocated to class B-4.

15    ALLOCATIONS AMONG THE SENIOR CLASSES

15.1 ORDER OF ALLOCATION AMONG SENIOR TARGET-RATE CLASSES

On each distribution day before the subordination depletion date, the aggregate
scheduled and unscheduled principal allocated to the senior target-rate classes
of a group will be allocated to the individual senior target-rate classes of
that group as follows:

     GROUP I: Principal allocated to the group I senior target-rate classes from
the pool I target-rate strip will be allocated concurrently as follows:

     First, to classes IA-9 and IA-10, the amounts determined under "NAS
classes" below.

     Second, concurrently as follows:

     A.    8.4681053828% to class IA-1 until its principal balance is reduced to
          zero, and

     B.    91.5318946172% sequentially as follows:

          1. up to $1,132,982 concurrently as follows:

               a.    97% sequentially to classes IA-7 and IA-8, in that order,
                    until their principal balances are reduced to zero, and

               b.    3% concurrently to classes IA-3 and IA-5, in proportion to
                    their principal balances, until their principal balances are
                    reduced to zero;


                                       16

<PAGE>

          2.    concurrently to classes IA-3 and IA-5, in proportion to their
                principal balances, until their principal balances are reduced to
               zero; and

          3.    sequentially to classes IA-7 and IA-8, in that order, until their
               principal balances are reduced to zero.

     Third, concurrently as follows:

     A. 72.2398827717% sequentially as follows:

          1.    concurrently to classes IA-2 and IA-17, in proportion to their
               principal balances, until their principal balances are reduced to
               zero, and

           2.    to class IA-16 until its principal balance is reduced to zero;
               and

     B. 27.7601172283% concurrently as follows:

          1.    95.8333328009% sequentially as follows:

               a.    sequentially to classes IA-11, IA-12, and IA-13, in that
                    order, until their principal balances are reduced to zero,
                    and

               b.    concurrently to classes IA-14 and IA-15, in proportion to
                    their principal balances, until their principal balances are
                    reduced to zero; and

          2.    4.1666671991% to class IA-6, until its principal balance is
               reduced to zero.

     Fourth, concurrently to classes IA-9 and IA-10 until their principal
balances are reduced to zero.

     GROUP II: Principal allocated to the group II senior target-rate classes
from the pool II target-rate strip will be allocated to class IIA-1 until its
principal balance is reduced to zero.

     GROUP III: Principal allocated to the group III senior target-rate classes
from the pool III target-rate strip will be allocated to class IIIA-1 until its
principal balance is reduced to zero.

     Beginning on the subordination depletion date, the priorities stated above
will cease to be in effect, and the principal allocation for the senior
target-rate classes of each group will be allocated to the senior target-rate
classes of the group in proportion to their principal balances on the preceding
day.

15.2 NAS CLASSES

Classes IA-9 and IA-10 are non-accelerated senior, or NAS classes. The principal
allocation for each NAS class will equal.

     o     its proportionate share, based on the principal balances of the
          group's senior target-rate classes, of scheduled principal payments on
          the related pool's target-rate strip allocated to the group's senior
          target-rate classes for that distribution day, plus

     o     the following percentage of its proportionate share, based on
          principal balances of the group's senior target-rate classes, of
          unscheduled principal payments on the related pool's target-rate strip
          allocated to the group's senior target-rate classes for that
          distribution day:

distribution day    percentage
-----------------------------
     0 - 60              0%
    61 - 72             30%
    73 - 84             40%
    85 - 96             60%
    97 - 108            80%
  109 and after         100%

15.3 PAC AND TAC CLASSES

There are no planned amortization (or PAC) classes.

     There are no targeted amortization (or TAC) classes.

16    DISTRIBUTIONS

16.1 TYPES OF DISTRIBUTIONS

Each distribution will be either an interest distribution, a principal
distribution, a reim-


                                       17

<PAGE>

bursement, or a residual distribution, as described in "- Distribution
priorities" below.

16.2 ACCRUAL AND ACCRUAL DIRECTED CLASSES

There are no accrual classes or accrual directed classes.

16.3 DISTRIBUTION PRIORITIES

Subject to section 18, "loss recoveries," on each distribution day, the pool
distribution amount will be first distributed to any Insurer to pay any
insurance premium, and then to the outstanding classes in the following priority
(and, if there are any insured classes, the insured payment and amounts
withdrawn from the reserve fund will be applied to make payments to the insured
class certificates as provided in "Insured classes" below):

     (1) To each senior class, first, its current interest allocation for that
distribution day, and second its interest allocation carryforward from the
preceding distribution day, except that an accrual class's interest
distributions may be redirected as described in "- Accrual and accrual directed
classes" above. Distributions of current allocations among the senior classes
will be in proportion to current interest allocations for, and distributions of
interest allocation carryforwards will be in proportion to interest allocation
carryforwards to, that distribution day.

     (2) (a) To any ratio-stripped PO class, principal up to its principal
allocation for that distribution day, and (b) to the senior target-rate classes,
principal up to their aggregate principal allocation for that distribution day,
to be distributed to the senior target-rate classes in the priorities described
in "Allocations among the senior classes - Order of allocation among senior
target-rate classes" above.

     (3) To each subordinated class, in order of seniority, first, interest up
to its interest allocation for that distribution day, and second, principal up
to its principal allocation for that distribution day, except that a
subordinated class's principal distribution may be used to reimburse a
ratio-stripped PO class, as described in the following paragraph.

      (4) Principal distributed to the subordinated classes under the preceding
paragraph will be used to reimburse a ratio-stripped PO class up to the amount
of (a) any realized subordinated losses previously allocated to the
ratio-stripped PO class, and (b) any reduction to the ratio-stripped PO class's
principal balance to reflect the excess of (i) the aggregate principal
allocations to the ratio-stripped PO class over (ii) the aggregate principal
distributions to the ratio-stripped classes, as described in "Adjustments to
class balances" below, to the extent that such losses and reductions were not
previously reimbursed under this paragraph (4) or "Loss recoveries" below. Such
reimbursements will be taken from distributions to the subordinated classes in
order of subordination.

     (5) To each class, in order of seniority, a reimbursement of any reduction
to the classes' principal balances to reflect the excess of (a) the aggregate
principal allocations to the classes over (b) the aggregate principal
distributions to the classes, as described in "Adjustments to class balances"
below, to the extent such reductions were not previously reimbursed. Classes
with equal seniority will share in the reimbursement in proportion to such
unreimbursed reductions.

     (6) To the residual certificates, a residual distribution of the remaining
pool distribution amount.

     A class that is no longer outstanding cannot receive a distribution.


                                       18

<PAGE>

     Notwithstanding anything to the contrary in this agreement, no distribution
will be made to a subordinated class on a distribution day if on that
distribution day the principal balance of a more senior class would be reduced
by any part of the principal portion of a realized subordinated loss.

16.4 DISTRIBUTIONS TO CERTIFICATE HOLDERS

On each distribution day, distributions to a class will be distributed to the
holders of the certificates of the class in proportion to the principal or
notional balances of their certificates.

16.5 FINAL DISTRIBUTION ON THE RESIDUAL CERTIFICATES

Upon termination of the Trust in accordance with section 9.1, "Termination upon
repurchase by CMSI or liquidation of all mortgage loans," any class PR
certificates, and if there are no class PR certificates, the LR certificates
will receive all amounts remaining in the certificate account and in any retail
reserve fund after all required distributions on the certificates, and any
required distributions to any Insurer, have been made.

16.6 WIRE TRANSFER ELIGIBILITY

The minimum number of single certificates eligible for wire transfer on each
distribution day, for the certificates, is 1,000 (representing a $1,000,000
initial principal balance or initial notional balance) and, for the residual
certificates, a 100% percentage interest.

17    ADJUSTMENTS TO CLASS BALANCES

On each distribution day, the principal balance of each class that is not an IO
class will be adjusted, in the following order, as follows:

     (1) The principal balance of any ratio-stripped PO class will be reduced by
realized losses on its PO strip for the preceding month.

     (2) The aggregate principal balance of the target-rate classes will be
reduced by the principal portion of realized non-subordinated losses on the
target-rate strip for the preceding month. The reduction will first be allocated
between the subordinated classes, collectively, and the senior target-rate
classes, collectively, in proportion to aggregate principal balances. The
reduction for the subordinated classes will be allocated to the individual
subordinated classes in proportion to their principal balances. The reduction
for the senior target-rate classes will be allocated to the individual senior
target-rate classes in proportion to their principal balances, except that the
principal balance of an accrual class will be deemed to be the lesser of its
principal balance or its initial principal balance.

     (3) To the extent that on the distribution day an interest distribution to
an accrual class is redirected to an accrual directed class, the principal
balance of the accrual class will be increased.

     (4) The principal balance of each class will be reduced by its principal
distributions for that distribution day, including

(a)   principal distributions to an accrual directed class that are redirected
     from interest distributions to an accrual class, and

(b)   principal distributions to a subordinated class, even if part or all of
     those principal distributions are, pursuant to section 16.3(4), used to
      reimburse a ratio-stripped PO class.

However, any portion of an accrual class's interest distribution that, on the
distribution day before the class's accrual termination day, is distributed as
principal to the accrual class itself, will neither increase nor decrease the
class's principal balance.


                                       19

<PAGE>

     (5) The aggregate principal balance of the target-rate classes will be
reduced by the principal portion of realized subordinated losses on the
target-rate strip for the preceding month. The reductions will be applied first
to the subordinated classes in order of subordination, in each case until the
principal balance of the class is reduced to zero. If the realized subordinated
losses exceed the principal balance of the subordinated classes, the principal
balance of the senior target-rate classes will be reduced by the amount of the
excess. The excess will be allocated among the senior target-rate classes in
proportion to their principal balances, except that for this allocation, the
principal balance of an accrual class will be deemed to be the lesser of its
principal balance or its initial principal balance.

     (6) The principal balance of any ratio-stripped PO class will be reduced by
the excess of (a) the class's principal allocation over (b) the class's
principal distribution for that distribution day.

     (7) The principal balance of each target-rate class will be reduced, in
order of subordination, in an aggregate amount equal to the excess of (a) the
aggregate principal allocations to the target-rate classes over (b) the
aggregate principal distributions to the target-rate classes. Classes of equal
seniority will share in such reduction in proportion to the amounts by which the
principal allocation to each such class exceeded its principal distribution.

     For purposes of the preceding paragraphs (1) through (7),

o     the principal portion of a debt service reduction will not be considered a
     realized loss, and

o     references to the class principal balances in any paragraph mean the
     principal balances after the adjustments required by the preceding numbered
     paragraphs.

     Where the principal balance of a class is reduced due to a realized loss
under the preceding paragraphs (1), (2) or (5), the loss will be said to be
allocated to the class (an allocated loss) to the extent of the reduction.

18    LOSS RECOVERIES

The following rules for loss recoveries supersede any conflicting rules in
"Distributions" or "Adjustments to class balances" above.

     On each distribution day, the amount of any loss recovery for the preceding
month will be distributed as follows:

     First, to each senior class to the extent of and in proportion to its
aggregate realized losses for that and all preceding months that were not
previously reimbursed under this paragraph or, for a ratio-stripped PO class,
paragraph 4 of "Distributions -- Distribution priorities" above.

     Second, to the target-rate classes in the same manner as a distribution of
unscheduled principal.

     Distributions made pursuant to paragraph First above will not result in any
adjustments to class balances, but distributions made pursuant to paragraph
Second above will result in the normal adjustments to the class balances
described in paragraph 4 of "Adjustments to class balances" above.

     The principal balances of the subordinated classes will be increased in
order of seniority to the extent of their aggregate realized losses for that and
all preceding months that were not previously reimbursed under this paragraph,
up to an aggregate amount for all subordinated classes equal to the loss
recovery less the amounts distributed to the senior classes under paragraph
First above.

     Example: In May, there is a $1,000 of loss recovery. On the June
distribution day, prior to any distributions or adjustments, the senior


                                       20

<PAGE>

classes have aggregate unreimbursed losses of $100 and the subordinated classes
have aggregate unreimbursed losses of $700. Then on the June distribution day,

     1 $100 of the loss recovery will be distributed to the senior classes to
reimburse them for previously allocated losses, but the distribution will not
reduce the principal balances of the senior classes.

     2 The remaining $900 of the loss recovery will be distributed to the
target-rate classes in the same manner as unscheduled principal, and class
balances will be reduced by the amount of the distributions.

     3 The principal balances of the subordinated classes will be increased by
the remaining $900. (The increase may be less than $900 if any of the
subordinated classes are no longer outstanding.)

     If expenses on the liquidated loans for any month exceed the amounts
recovered on the liquidated loans for the month, the excess will be treated as a
realized loss on the mortgage loans.

19    ADDITIONAL STRUCTURING FEATURES

The preceding provisions for allocations and distributions, and for adjustments
to class balances, are subject to the following sections on LIBOR classes,
composite and component classes, multiple-pool series, retail classes, and
insured classes.

20    LIBOR CLASSES

Classes IA-3 through IA-5 are LIBOR classes.

     Each LIBOR class will have a monthly LIBOR accrual period from the day of
the month indicated in the footnotes to the table in "The Series - General terms
for classes" above through the day preceding the first day of the next LIBOR
accrual period. The first LIBOR accrual period for a class will be the latest
possible LIBOR accrual period that ends before the first distribution day.

     Example: The LIBOR accrual period for a LIBOR class begins on the 25th day
of the month, and the first distribution day is February 25, 200x. Then the
first LIBOR accrual period for the class begins on January 25, 200x and runs
through February 24, 200x, the second LIBOR accrual period begins on February
25, 200x and runs through March 24, 200x, and so forth.

     A LIBOR class will not accrue interest for any period before its first
LIBOR accrual period. The interest rate for each LIBOR class is stated in "The
series - General terms for classes" above.

     CMSI will determine LIBOR for each LIBOR accrual period (after the first
LIBOR accrual period) on the second business day before the beginning of each
LIBOR accrual period as follows:

O     LIBOR for any determination day will be the British Bankers Association
     LIBOR rate for US dollar deposits with a one-month maturity at 11AM, London
     time on that day, as such rate appears on Telerate Page 3750, Bloomberg
     Page BBAM, or another page of these or any other financial reporting
     service in general use in the financial services industry, rounded upward,
     if necessary, to the nearest multiple of 1/16 of 1%.

o     If no rate is so reported on that day, CMSI will determine LIBOR on the
     basis of the rates on that day at approximately 11AM, London time, at which
     deposits in U.S. Dollars with a maturity of one month in a principal amount
     of not less than U.S. $1 million and representative for a single
     transaction in that market at that time, are offered to prime banks in the
     London interbank market for at least four major banks in the London
     interbank market selected by CMSI. CMSI will request the principal London
     office of each such bank to provide a quotation of its rate. If at least
     two such quotations are provided, LIBOR will be the arithmetic mean of
     those quotations.


                                       21

<PAGE>

o     If fewer than two quotations are provided, LIBOR will be the arithmetic
     mean of the rates quoted at approximately 11AM, New York time, on that day
     by three major banks in New York City selected by CMSI for loans in U.S.
     Dollars to leading European banks having a maturity of one month in a
     principal amount of not less than U.S. $1 million that is representative
     for a single transaction in such market at such time. If the banks selected
     by CMSI are not quoting such rates, LIBOR will be LIBOR for the preceding
     LIBOR accrual period.

     CMSI may designate an affiliate or a third party to determine LIBOR.

21    COMPOSITE AND COMPONENT CLASSES

The composite classes of the series, and each composite class's component
classes are shown in the table in "The series - General terms for classes"
above.

     Each composite class is comprised of two or more component classes.
Certificates are only issued for composite classes. Component classes cannot be
severed from their composite classes, and cannot be separately transferred.
Component classes are, however, considered classes for all purposes of the
preceding sections on allocations and distributions except that all
distributions to the component classes of a composite class will become
distributions to the composite class. A composite class is not considered a
class for purposes of allocations and distributions, but instead receives all
the distributions made to any of its component classes. Voting is by composite,
not component, classes.

     In a multiple-pool series, each subordinated class is a composite class
formed of two or more component classes. Unless otherwise specified, references
to a "subordinated class" mean the composite class.

22    MULTIPLE-POOL SERIES

This is a multiple-pool series. The mortgage loans of this series are divided
into three pools. Pool I consists of the mortgage loans described in exhibit
B-1, Pool II consists of the mortgage loans described in exhibit B-2, and Pool
III consists of the mortgage loans described in exhibit B-3.

     Each class of this series (other than certain composite classes) belongs to
a group of classes related to a specific pool. The designation of each class in
a group bears the roman numeral prefix of its related pool, and the group is
referred to by that prefix.

     Example: Classes related to pool I bear the prefix "I," as IA-1, IB-1,
etc., and are referred to collectively as "group I."

     With exceptions described below, the classes of each group are treated like
a separate series, with allocations to the classes of the group being based
solely on payments on the related pool. Any ratio-stripping will be done on a
pool basis, so that there will be separate PO, IO and target-rate strips for
each pool, with the related group having its own target-rate, and ratio-stripped
IO and PO, classes.

     The subordinated classes of each group will be component classes. A
ratio-stripped IO or PO class of a group will only be a component class if so
designated in "The series - General terms for classes" above.

22.1 ADJUSTMENT OF SUBORDINATED COMPONENT CLASS PRINCIPAL BALANCES

On each distribution day, the aggregate amount of any

o     realized subordinated losses on the mortgage loans in a pool, or

o     excess of the aggregate principal allocations to the related group's
     target-rate classes over the aggregate principal distributions to those
     classes,

     that, in accordance with "Adjustments to class balances" above, would
reduce the


                                        22

<PAGE>

principal balances of the group's subordinated component classes in order of
subordination if the pool and the related groups were considered a separate
series, will instead reduce

o     the principal balances of the subordinated composite classes in order of
     subordination, and

o     the aggregate principal balance of the group's subordinated component
     classes, by that amount.

     Such reduction in the aggregate principal balance of a group's subordinated
component classes will result in adjustments to the principal balance of the
subordinated component classes of each group so the ratio of the principal
balances of the component classes from each group will be the same for each
subordinated composite class.

     Example: Assume subordinated composite classes B-1 through B-6, each with a
principal balance of $1,000. There are two groups, I and II, and the aggregate
principal balance of each group's subordinated component classes is $3,000. Then
for each subordinated composite class, the ratio of the principal balance of its
group I component class to the principal balance of its group II component class
must be 1 to 1. Consequently, both the group I and the group II component class
of each subordinated composite class will have a principal balance of $500.

     Now assume a $750 subordinated loss in pool I. Then

o     the principal balance of class B-6 will be reduced by $750, to $250, which
     will reduce the aggregate principal balance of the subordinated composite
      classes to $5,250,

o     the aggregate principal balance of the group I subordinated component
     classes will be reduced by $750, to $2,250, while the aggregate principal
     balance of the group II subordinated component classes will remain at
      $3,000;

o     the ratio of the aggregate principal balance of the group I subordinated
     component classes to the aggregate principal balance of the group II
     subordinated component classes will be $2,250 to $3,000, or 3 to 4;

o     for classes B-1 through B-5, the principal balance of the composite class
     will remain at $1,000, but the principal balance of its group I component
     class will be approximately $428.57, and the principal balance of its group
     II component class will be approximately $571.43 (a ratio of 3 to 4); and

o     class B-6's principal balance of $250 will be comprised of a group I
     component class with a principal balance of approximately $107.14, and a
     group II component class with a principal balance of approximately $142.86
     (a ratio of 3 to 4).

     If subordinated losses on a mortgage pool for a distribution day exceed the
aggregate principal balance of the subordinated component classes of the related
group, the aggregate principal balance of such component classes will be reduced
to zero, and the aggregate principal balance of the subordinated component
classes of the other groups will be reduced by the excess.

     Example: Suppose that in the series in the preceding example, the group I
subordinated component classes and the group II subordinated component classes
each have an aggregate initial principal balance of $3,000, and that each
subordinated composite class, B-1 through B-6 has a principal balance of $1,000.
Now suppose that there are $4,000 of subordinated losses on the mortgage loans
in pool II's target-rate strip, but no losses on the mortgage loans in pool I's
target-rate strip. Then the entire $4,000 of losses will be allocated to the
subordinated classes, reducing the principal balance of classes B-3 through B-6
to zero. Classes B-1 and B-2 will each retain a principal balance of $1,000,
comprised of a group I component class with a principal balance of $1,000 and a
group II component class with a principal balance of $0. The principal balance
of the subordinated group I component classes will thus be reduced by


                                       23

<PAGE>

$1,000 even though there are no losses on the pool I target-rate strip.

     Subject to "- Undercollateralization" below, if realized subordinated
losses on a distribution day exceed the aggregate principal balance of the
subordinated classes, the aggregate principal balance of the senior classes in
each group will be reduced by the group's proportional share of the excess
losses, based on the proportions of all the losses for that distribution day in
the mortgage loan pools.

     Example: Assume that for a distribution day, there are $2,250 of realized
subordinated losses in pool I and $4,500 of realized subordinated losses in pool
II. The aggregate principal balance of the subordinated classes is only $6,000.
Then the principal balance of the subordinated classes will be reduced to $0,
and the remaining $750 of losses will reduce the aggregate principal balance of
the senior classes of group I by $250 (or 1/3 of $750), and will reduce the
aggregate principal balance of the senior classes of group II by $500 (or 2/3 of
$750). The principal balances of the component classes of the subordinated
classes are irrelevant for these purposes.

22.2 MAINTENANCE OF SUBORDINATION

Impairment of subordination for subordinated classes of a multiple-pool series
will be determined based on composite, not component, classes. In determining
whether a composite class has an impaired subordination level, the principal
balance of the composite class will equal the sum of the principal balances of
its component classes. If a subordinated composite class has an impaired
subordination level, then principal will be allocated among the subordinated
composite classes pursuant to "Allocations - Maintenance of subordination"
above, and, for purposes of adjusting principal balances, will be further
allocated to the component classes in proportion to their principal balances.

22.3 DISTRIBUTION SHORTFALLS

If on a distribution day, payments on the mortgage loans in the target-rate
strip for a pool are not sufficient to permit payments of any insurance premium
due to an Insurer, and all interest and principal allocated to the senior
target-rate classes of the related group, then the pool may receive insurance
premium, interest and principal distributions from payments on the mortgage
loans in another pool once any insurance premium due is paid to the Insurer, and
full interest and principal distributions are made to the senior target-rate
classes of the group related to the other pool.

     Example: Suppose that there are two groups of classes and that on a
distribution day, cash available for distribution to the group I senior-target
rate classes from payments on the pool I mortgage loans is $1,000 less than the
aggregate interest and principal allocations to group I's senior target-rate
classes, while cash available for distribution to the group II senior-target
rate classes from payments on the pool II mortgage loans exceeds the aggregate
interest and principal allocations to group II's senior target-rate classes by
$1,500. Then $1,000 of the extra $1,500 available to group II will be used to
make full interest and principal distributions to the group I senior target-rate
classes, and only the remaining $500 will be distributed to the group II
subordinated component classes.

     If there are several pools for which mortgage loan payments do not provide
enough cash for full distributions to the senior target-rate classes and any
Insurer, the related groups will receive cash from other pools in proportion to
the aggregate amount by which any insurance premium due to an Insurer, and
interest and principal distributions would otherwise fall short of interest and
principal allocations. If there are several pools where mortgage loan payments
provide cash in excess of the amount required


                                       24

<PAGE>

for full distributions, they will provide cash to the senior target-rate
classes, and any Insurer, of those groups related to the other pools in
proportion to the amounts of the excess.

22.4 UNDERSUBORDINATION

If on a distribution day before the subordination depletion date, the principal
balances of all the senior target-rate classes of any group (but not the
principal balances of all the group's subordinated component classes) have been
reduced to zero, and there is undersubordination (as defined below), then on
that distribution day, before any distributions are made,

o     the pool distribution amount of the group will be reduced by an amount (the
     reduction amount) equal to the lesser of (1) unscheduled principal payments
     on the related pool's target-rate strip received by the Trust during the
     preceding month and (2) the excess, determined without regard to this
     section "- Undersubordination," of the pool distribution amount over the
     amount required to be used to reimburse any ratio-stripped PO classes,

o     the principal allocation to each class in the group will be reduced by the
     class's proportionate share, based on principal balances, of the reduction
     amount,

o     the pool distribution amount of each group whose senior target-rate classes
     have not been reduced to zero will be increased by a proportionate share of
     the reduction amount based on the aggregate principal balance of the senior
     target-rate classes of each such group, and

o     the aggregate principal allocation for the senior target-rate classes of
     each group whose senior target-rate classes have not been reduced to zero
     will be increased by the portion of the reduction amount added to its pool
     distribution amount, which increased aggregate allocation will be further
     allocated among the senior target-rate classes in accordance with the rules
     in "Allocations among the senior target-rate classes" above.

     There is undersubordination on a distribution day if either

o     the subordination level of the senior classes (without regard to group) on
      that distribution day is less than 200% of the initial subordination level
     of the senior classes, or

o     the aggregate scheduled principal balance of the mortgage loans in any pool
     that are delinquent 60 days or more (including for this purpose mortgage
     loans in foreclosure and real estate owned by the Trust as a result of
     Mortgagor default), averaged over the last six months, is 50% or more of
     the principal balance of the related group's subordinated component
     classes.

22.5 UNDERCOLLATERALIZATION

Because losses on a mortgage loan may be allocated in part to the subordinated
component classes of a different group, the scheduled principal balance of a
pool's target-rate strip could differ from the aggregate principal balance of
the related group's target-rate classes. If the scheduled principal balance of a
pool's target-rate strip is less than the aggregate principal balance of the
related group's target-rate classes, the group will be undercollateralized by
the amount of the difference; conversely, if the scheduled principal balance of
a pool's target-rate strip is more than the aggregate principal balance of the
related group's target-rate classes, the group will be overcollateralized by the
amount of the difference.

      If a group is undercollateralized, the normal distribution rules will be
adjusted as follows:

     (1) To the extent that scheduled interest payments on the target-rate strip
of a pool related to an overcollateralized group ex-


                                        25

<PAGE>

ceed the aggregate interest allocations to that groups' target-rate classes,
plus any insurance premium due to an Insurer, that excess, up to the amount of
any interest allocation carryforwards that the undercollateralized group would
otherwise experience on that distribution day and the insurance premium, will be
deducted from the pool distribution amount for the overcollateralized group and
added to the pool distribution amounts for the undercollateralized group. If
there is more than one such undercollateralized group, or more than one
overcollateralized group, then (a) amounts will be deducted from the pool
distribution amounts for the groups that are overcollateralized in proportion to
such excess interest payments, up to the aggregate amount of such interest
allocation carryforwards and the insurance premium for the undercollateralized
groups, and (b) amounts will be added to the pool distribution amounts of the
undercollateralized groups in proportion to the amount of such interest
allocation carryforwards and insurance premium.

     (2) Before the subordination depletion date, if one or more groups is
undercollateralized and the principal balance of each of the groups'
subordinated component classes has been reduced to zero, then (a) all amounts
that (after required reimbursements to any ratio-stripped PO classes) would
otherwise be distributed as principal to the subordinated component classes of
the other groups, up to the aggregate amount by which such undercollateralized
groups are undercollateralized, will, in proportion to the aggregate principal
balance of the subordinated component classes of such other groups, be deducted
from the pool distribution amount and the principal allocations to the
subordinated component classes of such other groups, and (b) such amount will be
added to the pool distribution amounts and the principal allocations of the
target-rate classes of such undercollateralized groups, in proportion to the
amount by which such groups are undercollateralized.

     (3) After the subordination depletion date, if a group is
undercollateralized, then

o     once a group's target-rate classes are all reduced to zero, principal
     payments on the related pool's target-rate strip will be added to the pool
      distribution amount and to the principal allocations of the target-rate
     classes of the undercollateralized groups, in proportion to the amount by
     which they are undercollateralized, and

o     realized losses on the target-rate strips of the pools related to the
     overcollateralized groups will, up to the amount by which the group is
     overcollateralized, not reduce the principal balances of the target-rate
     classes of those groups, but will instead reduce the principal balances of
      the target-rate classes of the undercollateralized groups, in proportion to
     the amount by which they are undercollateralized, and in accordance with
     "Adjustments to class balances" above. If there is more than one
     overcollateralized group, the losses that will not reduce principal balance
     will be in proportion to the amount by which each group is
     overcollateralized. If there is more than one undercollateralized group,
     the aggregate reductions in principal balances for each group will be in
     proportion to the amounts by which such groups are undercollateralized.

22.6 NON-SUBORDINATED INTEREST SHORTFALLS

Prior to the subordination depletion date, reductions to interest allocations
due to (a) interest shortfalls due to the federal Servicemembers Civil Relief
Act or any comparable state laws and (b) non-supported prepayment interest
shortfalls will be allocated pro-rata to all the classes of all the groups,


                                       26

<PAGE>

regardless of the pools in which the shortfalls originate.

     From and after the subordination depletion date,

o     interest shortfalls due to the federal Servicemembers Civil Relief Act or
     any comparable state laws will be separately calculated for each pool, and
     will be allocated solely to the classes of the related group, and

o     the compensating cap and non-supported prepayment interest shortfalls will
     be separately calculated for each pool, and non-supported prepayment
     interest shortfalls for a pool will be allocated solely to the classes of
     the related group.

23    SUPER SENIOR CLASSES

The following table lists the super senior classes, and their respective super
senior support classes.

Super senior    Super senior support
------------     --------------------
    IA-10               IA-9

After the subordination depletion date, any loss (other than a non-subordinated
loss) on a target-rate strip that would otherwise reduce the principal balance
of a super senior class will instead reduce the principal balance of its super
senior support classes until the principal balance of its super senior support
classes is reduced to zero.

     For these purposes, the principal balance of a super senior support class
on a distribution day will be determined after giving effect to the adjustments
described in paragraphs (2) through (5) of section 17, "Adjustments to class
balances," for that distribution day (which include the reductions for
non-subordinated losses, principal distributions and realized subordinated
losses), but before the adjustments required by this section 23.

24    RETAIL CLASSES

There are no retail classes. There is no retail reserve fund.

25    INSURED CLASSES

There are no insured classes. There is no Insurer, certificate insurance policy,
insurance premium, or reserve fund.

26    ADVANCE ACCOUNT

There is/are no advance account, advance account advances, advance account
available advance amount, advance account depository, advance account depository
agreement, advance account funding date, or advance account trigger date, Paying
Agent failure, or Paying Agent failure advance.

27    REMIC PROVISIONS

27.1 CONSTITUENT REMICS

(a) CMSI and the Trustee will make the appropriate elections to treat the Trust
Fund, and the affairs of the Trust Fund will be conducted so as to qualify the
Trust Fund, for federal income tax purposes as three separate constituent REMICs
- the pooling REMIC, the lower-tier REMIC, and the upper-tier REMIC. The pooling
REMIC will be the applicable constituent REMIC for purposes of section 3.21.

     The assets of the pooling REMIC will consist of the mortgage loans, such
amounts as may from time to time be held in the certificate account, any
insurance policies relating to a mortgage loan, and property that secured a
mortgage loan and that has been acquired by foreclosure or deed in lieu of
foreclosure and all proceeds thereof. Classes IA-IO, IIA-IO, IIIA-IO, IA-PO,
IIA-PO and IIIA-PO and the class P regular interests described below, are
designated as the regular interests in the pooling REMIC within the meaning of
Internal Revenue Code Section 860G(a)(1). Class PR is designated as the


                                       27

<PAGE>

residual interest in the pooling REMIC within the meaning of Internal Revenue
Code Section 860G(a)(2).

     The assets of the lower-tier REMIC will consist of the class P regular
interests described below, the Trustee's rights under any certificate insurance
policy and reserve fund, any retail reserve fund, and any assets in the
lower-tier REMIC account described below. Classes IA-1, IA-2, IA-6 through
IA-17, IIA-1, IIIA-1 and B-1 through B-6, and the class L regular interests
described below, are designated as the regular interests in the lower-tier
REMIC. Class LR is designated as the residual interest in the lower-tier REMIC.

     The assets of the upper-tier REMIC will consist of the class L regular
interests described below, and any assets in the upper-tier REMIC account
described below. Classes IA-3 through IA-5 are designated as the regular
interests in the upper-tier REMIC. Class R is designated as the residual
interest in the upper-tier REMIC.

27.2 THE CLASS P AND CLASS L REGULAR INTERESTS

There are six uncertificated class P regular interests, each designated as
"Citicorp Mortgage Securities Trust REMIC Pass-Through Certificates, Series
2006-2," and further individually designated as a

o     "PI-M regular interest,"

o     "PI-Q regular interest,"

o     "PII-M regular interest,"

o     "PII-Q regular interest,"

o     "PIII-M regular interest," and

o     "PIII-Q regular interest,"

     There are two uncertificated class L regular interest, designated as
"Citicorp Mortgage Securities Trust. remic Pass-Through Certificates, Series
2006-2," and further designated as the "LI-3 regular interest" and "LI-5 regular
interest."

     The initial principal or notional balances and certificate rates of the
class P and class L regular interests are:

            initial principal
Regular        (or notional)          certificate
interest           balance          rate (per annum)
--------    -------------------    ----------------
PI-M        $         960.027812          5.75%
PI-Q        $334,670,444.092188          5.75%
PII-M       $         163.218764          5.50%
PII-Q       $ 56,582,179.421236           5.50%
PIII-M      $          77.820577          5.50%
PIII-Q      $ 27,067,263.949423          5.50%
LI-3        $      53,090,169.00          5.75%
LI-5        $      55,000,000.00          5.75%

     The Trustee acknowledges that it is holding the class P regular interests
as assets of the lower-tier REMIC and the class L regular interests as assets of
the upper-tier REMIC.

27.3 DISTRIBUTIONS TO CLASS P AND CLASS L REGULAR INTERESTS

On each distribution day, each regular interest will receive a principal
distribution, or allocation of the principal portion of realized losses, equal
in the aggregate to the principal distribution, or allocation of the principal
portion of realized losses, for that day on,

o     for the PI-M and PI-Q regular interests, the pool I target-rate strip;

o     for the PII-M and PII-Q regular interests, the pool II target-rate strip,

o     for the PIII-M and PIII-Q regular interests, the pool II target-rate strip,

o     for the class LI-3 regular interest, class IA-3, and

o     for the class LI-5 regular interest, class IA-5.

     Recoveries of previously allocated realized losses of principal will be
allocated to the class P and any class L regular interests in the same manner as
realized losses were allocated to them.

     For each distribution day, and for each pool x and y, the Px-M regular
interest will receive distributions of principal, or alloca-


                                       28

<PAGE>

tion of the principal portion of realized losses on the related target-rate
strip, so as to keep its principal balance (computed to $.000001) equal to 0.01%
of the aggregate principal balance of the subordinated component classes of the
related group. However, if the ratio of the principal balance of the Px-M
regular interest to the principal balance of the Py-M regular interest is not
the same as the ratio of the aggregate principal balance of the component
classes xB-1 through xB-6 to the aggregate principal balance of the component
classes yB-1 through yB-6, then the least amount of principal will be
distributed to the Px-M or Py-M regular interest, as applicable, so that the
ratio of the principal balance of the Px-M regular interest to the principal
balance of the Py-M regular interest will be the same as the ratio of the
aggregate principal balance of the component classes xB-1 through xB-6 to the
aggregate principal balance of the component classes yB-1 through yB-6. Also,
for such distribution day, the Px-Q regular interest will receive the balance of
the principal distribution, and allocation of the principal portion of realized
losses on its related target-rate strip.

     As of any date,

o     the principal balance of the class LI-3 regular interest will equal the
     principal balance of class IA-3, and

o     the principal balance of the class LI-5 regular interest will equal the
     principal balance of class IA-5.

     On each distribution day, each class P and any class L regular interest
will receive an interest distribution at its certificate rate, and interest
shortfalls and the interest portion of realized losses for the related
target-rate strip will be allocated to such regular interest in the same
proportion as interest is allocated to them, provided that

o     (a) prior to the subordination depletion date, non-supported prepayment
     interest shortfalls will be allocated pro-rata to all the class P regular
     interests, regardless of the pool in which the shortfalls originate, and
     (b) from and after the subordination depletion date, non-supported
     prepayment interest shortfalls for any pool x (where x is a variable for
     pool designations I, II, etc.) will be allocated solely to the Px-M and
     Px-Q regular interests, and

o     (a) prior to the subordination depletion date, any class L regular interest
     will be allocated its proportional share, based on accrued interest of any
     lower-tier REMIC regular interests, of non-supported prepayment interest
     shortfalls, regardless of the pool in which the shortfalls originate, and
     (b) from and after the subordination depletion date, any class L regular
     interest will be allocated its proportional share, based on accrued
     interest of any class L regular interests and the other lower-tier REMIC
     regular interests designated class xA, of non-supported prepayment interest
     shortfalls for pool x.

     No interest shortfall amount or unpaid interest shortfall on any class P or
class L regular interest will bear interest.

     The certificate rate for the class LI-3 regular interests is comprised of
the sum of LIBOR plus 0.45% per annum payable on the class IA-3 certificates,
and 5.3% per annum minus LIBOR payable on that part of the notional balance of
the class IA-4 certificates that equals the principal balance of the class IA-3
certificates. The certificate rate for the class LI-5 regular interests is
comprised of the sum of LIBOR plus 0.55% per annum payable on the class IA-5
certificates, and 5.2% per annum minus LIBOR payable on that part of the
notional balance of the class IA-4 certificates that equals the principal
balance of the class IA-5 certificates.


                                       29

<PAGE>

27.4 REMIC ACCOUNTS AND DISTRIBUTIONS

CitiMortgage, the Trustee and the Paying Agent will

o     perform their duties in a manner consistent with the REMIC provisions of
     the Internal Revenue Code, and will not knowingly take or fail to take any
     action that would adversely affect the continuing treatment of the Trust
     Fund as segregated asset pools and the treatment of each such segregated
     asset pool as a REMIC or would result in the imposition of a tax on the
     Trust Fund, or any constituent REMIC, and

o     carry out their covenants in this agreement and the elections and reporting
     required in section 3.15 on behalf of each constituent REMIC, including
     maintaining the following segregated accounts:

     o     the certificate account,

     o     if there is a pooling REMIC, a pooling REMIC account,

     o     a lower-tier REMIC account, and

      o     if there is an upper-tier REMIC, an upper-tier REMIC account.

     Any pooling REMIC account, the lower-tier REMIC account, and any upper-tier
REMIC account will be established in the same manner as the certificate account.

     CitiMortgage, on behalf of the Trustee, will deposit daily in the
certificate account in accordance with section 3.3 all remittances received by
it, any amounts required to be deposited in the certificate account pursuant to
section 3.2, all other deposits required to be made to the certificate account
other than those amounts specifically designated to be deposited in any pooling
REMIC account, the lower-tier REMIC account, or any upper-tier REMIC account in
this section, "REMIC accounts and distributions," and all investments made with
moneys on deposit in the certificate account, including all income or gain from
such investments, if any. Funds on deposit in the certificate account will be
held and invested in accordance with the applicable provisions of section 3.2
and 3.20. Distributions from the certificate account will be made in accordance
with sections 3.6, 3.8 and these Series Terms to make payments in respect of the
regular and residual interests in any pooling remic, the lower-tier REMIC, and
any upper-tier REMIC and to pay servicing fees in accordance with section 3.6(h)
and any insurance premium.

     Notwithstanding anything herein to the contrary, regular and residual
interests in any pooling REMIC, the lower-tier REMIC, and any upper-tier REMIC
will not receive distributions directly from the certificate account. On each
distribution day,

o     if there is a pooling REMIC, CitiMortgage, on behalf of the Trustee, will
     withdraw from the certificate account and deposit by 12 noon in the pooling
     REMIC account all distributions to be made on such distribution day in
     respect of interest on or in reduction of the principal balance of any
     class P regular interests, and

o     if there is no pooling REMIC, CitiMortgage, on behalf of the Trustee, will
     withdraw from the certificate account and deposit by 12 noon in the
     lower-tier REMIC account all distributions to be made on such distribution
     day in respect of interest on or in reduction of the principal balance of
     the regular interests in the lower-tier REMIC.

     If there is an upper-tier REMIC, CitiMortgage, on behalf of the Trustee,
will immediately thereafter withdraw from the lower-tier REMIC account and
deposit in the upper-tier REMIC account all distributions to be made on such
distribution day in respect of interest on or in reduction of the principal
balance of any class L regular interests.

     The Trustee will cause to be distributed from the lower-tier REMIC account
and any upper-tier REMIC account, to the extent


                                        30

<PAGE>

funds are on deposit therefor, all amounts required to be distributed with
respect to the regular and residual interests in the lower-tier REMIC and any
upper-tier REMIC as specified in these Series Terms.

      To the extent that any part of the lower-tier REMIC account or any
upper-tier REMIC account is designated in these Series Terms as an investment
account, the provisions in section 3.19 applicable to the investment of funds
will apply to such REMIC accounts. In addition, section 3.3(a) regarding
commingling will apply to such REMIC accounts.

     (b) CitiMortgage will maintain books for constituent REMICs on a calendar
year taxable year and on the accrual method of accounting.

     (c) The Trustee will not create, or permit the creation of, any "interests"
in any constituent REMIC within the meaning of Internal Revenue Code Section
860D(a)(2) other than the interests represented by the certificates or, if there
are multiple REMICs, the uncertificated regular interests in any pooling REMIC
or (if there is an upper-tier REMIC) the lower-tier REMIC.

     (d) Except as otherwise provided in the Internal Revenue Code, CitiMortgage
will not grant, and neither CitiMortgage nor the Trustee will accept, property
unless (i) substantially all of the property held by each constituent REMIC
constitutes either "qualified mortgages" or "permitted investments" as defined
in Internal Revenue Code Sections 860G(a)(3) and (5), respectively, and (ii) no
property will be granted to a constituent REMIC after the startup day, unless
the grant would not subject the constituent REMIC to the 100% tax on
contributions to a REMIC after the startup day imposed by Internal Revenue Code
Section 860G(d).

     (e) The Trustee will not accept on behalf of the Trust Fund or a
constituent REMIC any fee or other compensation for services and will not accept
on behalf of the Trust Fund any income from assets other than those permitted to
be held by a REMIC.

     (f) Neither CitiMortgage nor the Trustee will sell or permit the sale of
all or any portion of the mortgage loans, or of an Eligible Investment held in
the certificate account or in any REMIC account (other than in accordance with
sections 2.2, 2.3, 2.4 and 3.19(a)) unless such sale is pursuant to a "qualified
liquidation" as defined in Internal Revenue Code Section 860F(a)(4)(A) and is in
accordance with section 9.1.

27.5 TAX MATTERS PERSON

If in any taxable year there will be more than one holder of any class of
residual certificates, a tax matters person may be designated for the related
REMIC, who will have the same duties for the related REMIC as those of a "tax
matters partner" under Subchapter C of Chapter 63 of Subtitle F of the Internal
Revenue Code, and who will be, in order of priority, (i) CitiMortgage or an
affiliate of CitiMortgage, if CitiMortgage or such affiliate is the holder of a
residual certificate of the related REMIC at any time during the taxable year or
at the time the designation is made, (ii) if CitiMortgage is not a holder of a
residual certificate of the related REMIC at the relevant time, CitiMortgage as
agent for the holder of the residual certificate of the related REMIC, if the
designation is permitted to be made under the Internal Revenue Code, or (iii)
the holder of a residual certificate of the related REMIC or person who may be
designated a tax matters person in the same manner in which a tax matters
partner may be designated under applicable Treasury Regulations, including
Treasury Regulations Section 1.860F-4(d) and temporary Treasury Regulations
Section 301.6231(a)(7)-1T.


                                       31

<PAGE>

28    YIELD MAINTENANCE AGREEMENTS

28.1 AGREEMENTS

The Trustee is hereby directed to enter into two yield maintenance agreements
with The Bank of New York (the yield maintenance provider) in substantially the
form attached as exhibit F. The yield maintenance agreements are assets of the
Trust, but not of any constituent REMIC.

     Under the yield maintenance agreements, the yield maintenance provider will
make certain payments (yield maintenance payments) to the Trustee for the
benefit of the holders of the classes IA-3 and IA-5 certificates. Yield
maintenance payments received by the Trustee will be forwarded to the Paying
Agent for distribution to the holders of the class IA-3 and IA-5 certificates in
proportion to the principal balances of their certificates.

     Payments to the yield maintenance provider will be made by the Underwriter,
and the Trustee will have no responsibility for such payments.

     The Trustee may direct the yield maintenance provider and yield maintenance
guarantor to make yield maintenance payments directly to the Paying Agent.

     If a yield maintenance payment is made for the benefit of the holders of
the class IA-3 or IA-5 certificates on a distribution day, and the payment is
based on a "Notional Amount" for the class (as defined in the yield maintenance
agreement for the class) that exceeds the principal balance of the class on the
distribution day, that part of the payment allocable to the excess shall be paid
to the holders of the class IA-4 certificates, in proportion to the notional
principal balances of their certificates on the distribution day, rather than to
the holders of the class IA-3 or IA-5 certificates.

28.2 TAX TREATMENT

The Trustee will treat the portion of the Trust that holds the yield maintenance
agreements as a grantor trust for federal income tax purposes. The Trustee will
treat the holders of the class IA-3 and IA-5 certificates as the beneficial
owners of their respective yield maintenance agreements, and will treat the
holders of the class IA-4 certificates as the beneficial owners of an interest
in both yield maintenance agreements, in each case to the extent of their
respective entitlements. The Trustee will account for and report annually to the
holders of the class IA-3, IA-4 and IA-5 certificates and to the IRS (as
attachments to Form 1041 or other applicable form) their allocable shares of
income and expense with respect to the yield maintenance agreements. The Trustee
will not vary the investment of the holders of the class IA-3, IA-4 and IA-5
certificates to take advantage of variations in market rates of interest to
improve their rates of return.

29    NOTICE ADDRESSES

Notices should be sent:

     To the Trustee at its corporate trust office at One Federal Street, 3rd
Floor, Boston, Massachusetts 02110, Attention: Corporate Trust Services.

     To CMSI at Citicorp Mortgage Securities, Inc., 1000 Technology Drive,
O'Fallon, Missouri 63368, Attention: Larry Kent Slough.

     To CitiMortgage at CitiMortgage, Inc., 1000 Technology Drive, O'Fallon,
Missouri 63368, Attention: Larry Kent Slough.

     To S&P at 55 Water Street, 41st Floor, New York, New York 10041, Attention:
RMBS Surveillance.

     To Moody's at 99 Church Street, New York, New York 10007.

     To Fitch at Residential Mortgage Pass-Through Monitoring, Fitch Ratings,
One


                                       32

<PAGE>

State Street Plaza, 30th Floor, New York, New York 10004.

     To Citibank, N.A. at (a) for certificate transfer and presentment of
certificates for final distribution, at 111 Wall Street, 15th floor, New York,
NY 1005, Attention: 15th floor window, and (b) for all other purposes, at 388
Greenwich Street, 14th Floor, New York, NY 10013, Attention: Agency and Trust,
CMSI.

     To the Mortgage Document Custodian at Citibank (West), FSB, 5280 Corporate
Drive, M/C 0005, Frederick, Maryland 21703, Attention: Loretta Badgett.

     To any Insurer, at the address given for the Insurer in the first paragraph
of "Insured classes" above.

     The Paying Agent, any Insurer, CMSI and CitiMortgage may each change their
address for notices by written notice to the others. The Trustee may change its
corporate trust office by written notice to CMSI, CitiMortgage, any Insurer, and
all certificate holders.

30    INITIAL DEPOSITORIES

The initial Depository for the certificate and servicing accounts for the
mortgage loans will be Citibank (West), FSB.


                                        33

<PAGE>

STANDARD TERMS

1     DEFINITIONS AND USAGES

1.1 DEFINED TERMS

In this agreement, the following words and phrases have the following meanings:

     accrual termination day: For an accrual class, the earlier of (1) the first
distribution day on which the principal balance of each of its accrual directed
classes on the preceding day is zero, or (2) the subordination depletion date.

     affiliate: For a specified person, any other person that controls, is
controlled by or is under common control with the specified person. In this
definition, "control" of a specified person means the power to direct the
management and policies of the person, directly or indirectly, whether through
the ownership of voting securities, by contract or otherwise; and the terms
"controlling" and "controlled" have correlative meanings.

     affiliated servicing fee rate: 0.25% per annum. The monthly affiliated
servicing fee rate is one-twelfth of the affiliated servicing fee rate.

     aggregate outstanding advances: For a determination date, the aggregate of
net servicing account advances, net voluntary advances, net Paying Agent
advances and advance account advances made from the cut-off date to the
determination date, plus any uncommitted cash advances to be made on the next
distribution day.

     appraisal: For a mortgage loan, the appraisal conducted in connection with
the origination of the mortgage loan, whether originated upon the purchase of
the related mortgaged property or in connection with a refinancing.

     Authorized Officer: For CitiMortgage or CMSI, the Chairman of the Board of
Directors, the President, any Executive Vice President, Senior Vice President,
Vice President, Assistant Vice President, Controller, Assistant Controller,
Secretary, Assistant Secretary, Treasurer or Assistant Treasurer, or any other
natural person designated in an officer's certificate signed by any of the
foregoing officers and furnished to the Trustee and, solely in the case of a
statement given pursuant to section 3.22, any Servicing Officer.

     Bankruptcy Code: The United States Bankruptcy Code of 1978.

     bankruptcy coverage termination date: If there is a bankruptcy loss limit,
the distribution day on which the bankruptcy loss limit has been reduced to zero
or a negative number (or the subordination depletion date, if earlier).

   bankruptcy loss: For a mortgage loan, (1) a debt service reduction or (2) a
deficient valuation, unless, in either case, CitiMortgage has notified the
Trustee that CitiMortgage is diligently pursuing any remedies that may exist in
connection with the representations and warranties made regarding the related
mortgage loan and either (A) the related mortgage loan is not in default with
regard to payments due thereunder, or (B) delinquent payments of principal and
interest under the related mortgage loan, and any premiums on any applicable
hazard insurance policy and any related escrow payments for the mortgage loan,
are being advanced on a current basis without giving effect to any debt service
reduction.

     bankruptcy loss limit: If an initial bankruptcy loss limit is stated in the
Series Terms, for a distribution day, the initial bankruptcy loss limit minus
the aggregate amount of bankruptcy losses since the cut-off date. The bankruptcy
loss limit may be further reduced by CitiMortgage (including accelerating the
manner in which such coverage is reduced) provided that prior to the reduction,
each rating agency confirms in


                                        34

<PAGE>

writing to CitiMortgage (with a copy to the Trustee) that the reduction will not
adversely affect the rating agency's then-current rating of the certificates.

     beneficial owner: For a certificate held by a Clearing Agency, the person
who is the beneficial owner of the certificate as reflected on the Clearing
Agency's books or on the books of a person maintaining an account with the
Clearing Agency (directly or as an Indirect Participant, in accordance with the
Clearing Agency's rules).

     business day: Any day other than a Saturday, a Sunday or a day on which
banking institutions in New York, New York or in the cities where the Trustee,
the Paying Agent, CMSI, CitiMortgage, any Insurer (but only to the extent that
the Insurer is required under this agreement to make or receive a payment on
that day), any delegated servicers, and (but only if the third-party servicer is
depositing funds received on third-party mortgage loans with CitiMortgage or the
Paying Agent on that day) the third-party servicer is located are authorized or
obligated by law or executive order to be closed or, in the case of a
distribution day and if there are book-entry certificates, any day on which the
relevant Clearing Agency is closed. For purposes of determining LIBOR for any
LIBOR classes, a business day is a day on which banks in London and New York are
open for the transaction of international business.

     buydown account: The deposit account or accounts, which may bear interest,
created and maintained in the name of the Trustee for the benefit of the
mortgagors, subject to the rights of the Trustee pursuant to the buydown subsidy
agreements.

     buydown funds: Funds contributed at origination by the seller or buyer of a
property subject to a buydown mortgage loan, or by any other source, plus
interest earned thereon, in order to reduce the payments required from the
mortgagor for a specified period in specified amounts.

     buydown mortgage loan: Any mortgage loan for which, pursuant to a buydown
subsidy agreement, (i) the mortgagor pays less than the full monthly payments
specified in the mortgage note for a specified period, and (ii) the difference
between the payments required under the buydown subsidy agreement and the
mortgage note is provided from buydown funds.

     buydown subsidy agreement: The agreement relating to a buydown mortgage
loan pursuant to which an Originator may apply the buydown funds to a
mortgagor's payments.

     certificate holder or holder: The person in whose name a certificate is
registered in the Certificate Register.

     Citibank banking affiliate: An affiliate of Citibank, N.A. that is either
(i) a federal savings and loan association duly organized, validly existing and
in good standing under the federal banking laws, (ii) an institution duly
organized, validly existing and in good standing under the applicable banking
laws of any state, or (iii) a national banking association duly organized,
validly existing and in good standing under the federal banking laws.

      class: For certificates, any certificates designated as a class in the
Series Terms, for any class L or class P regular interests, the regular
interests in the constituent REMIC designated as such in "REMIC provisions"
above, and for residual certificates, all residual certificates having the same
class designation. A "class" will be understood not to include a residual class
of certificates unless otherwise expressly stated.

     class percentage: For one or more classes, the ratio of the aggregate of
the principal balances of the classes to the aggregate of the principal balances
of all classes of the series, expressed as a percentage.


                                       35

<PAGE>

     classes A-x through A-y: For a positive integer x and a greater integer y,
each class A-z for all integers z from x through y, inclusive. Example: "classes
A-3 through A-5" means each of classes A-3, A-4, and A-5. If a class is
designated with an integer and letter pair, then such class follows the class
with the same integer x and precedes the class of the next greater integer y.
Example: "classes A-3 through A-5" means, if there are classes A-4A and A-4B,
each of classes A-3, A-4, A-4A, A-4B, and A-5.

     classes B-x through B-y: For a positive integer x and any greater integer
y, each class B-z for all integers z from x through y, inclusive. Example:
"classes B-3 through B-5" means each of classes B-3, B-4 and B-5.

     Clearing Agency: An organization registered as a "clearing agency" pursuant
to Section 17A of the Exchange Act. The initial Clearing Agency will be The
Depository Trust Company.

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

     collected servicing fee on a mortgage loan: For any month, the excess of
the interest payment received on the mortgage loan for the month (including
accrued interest due but not received from liquidation or insurance proceeds for
liquidated loans) over the amount of interest on the mortgage loan for the month
at the pass-through rate, up to the servicing fee CitiMortgage is permitted to
retain under this agreement.

     debt service reduction: For a mortgage loan, a reduction in the scheduled
monthly loan payment for the mortgage loan by a court of competent jurisdiction
in a proceeding under the Bankruptcy Code or any similar state law, except a
reduction that would constitute a deficient valuation. If the court proceeding
results in an increase in the scheduled payment for a month (for example, a
final balloon payment or a payment in a month after the originally scheduled
maturity of the mortgage loan), the increased payment will be considered a
scheduled payment and not a debt service reduction.

     Example: Suppose a homeowner has a mortgage loan with an outstanding
principal balance of $50,000 and an interest rate of 7%. The loan has 10 years
to run. The homeowner files for bankruptcy, and the bankruptcy court (1) reduces
the outstanding principal balance to $40,000, (2) reduces the interest rate to
6%, and (3) stretches the payments out to 20 years. Then

o     the $10,000 reduction in principal owed is a bankruptcy loss, and

o     the difference between the monthly payment the homeowner would have made on
     the remaining $40,000 at the original interest rate and maturity, and the
     monthly payment the homeowner is now required to make on the new lower
     interest rate and extended maturity, is a debt service reduction, and

o     payments in the final 10 years (that is, after the originally scheduled
     maturity) will be scheduled payments.

     deficient valuation: For a 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 a reduction in the
scheduled monthly principal payment that results in a permanent forgiveness of
principal, which valuation or reduction results from a proceeding under the
Bankruptcy Code or any similar state law.

     delegated servicer: A person or persons, including a special servicer, to
whom CitiMortgage delegates some or all of its servicing obligations pursuant to
section 4.5.

     Depository: The bank or banks or savings and loan association or
associations or trust company or companies (which may be the


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<PAGE>

Trustee or which may be Citibank, N.A. or a Citibank banking affiliate ) at
which the certificate account, buydown account, escrow account, custodial
account for P&I and servicing account are established or maintained pursuant to
section 3.2, 3.3 or 3.3. Each Depository must meet the requirements of section
11.2.

   determination date: For each distribution day, the close of business on the
18th day (or, if that day is not a business day, the preceding business day) of
the month in which the distribution day occurs.

     discount loan: A mortgage loan that has a pass-through rate less than the
target rate.

     Eligible Account: Either

     (A) a segregated account or accounts maintained at Citibank, N.A. or a
Citibank banking affiliate, provided that the short-term unsecured debt
obligations of Citibank, N.A. or the Citibank banking affiliate are rated at
least "A-1+" by S&P if S&P is a rating agency, "F-l" by Fitch if Fitch is a
rating agency, and "P-1" by Moody's if Moody's is a rating agency, or

     (B) a segregated account or accounts maintained with an institution

o     whose deposits are insured by the FDIC,

o     the unsecured and uncollateralized debt obligations of which are rated at
     least "AA" by S&P if S&P is a rating agency, "AA" by Fitch if Fitch is a
     rating agency, and "Aa" by Moody's if Moody's is a rating agency,

o     that has a short term rating of at least "A-1+" by S&P if S&P is a rating
     agency, "F-1" by Fitch if Fitch is a rating agency, and "P-1" by Moody's if
     Moody's is a rating agency, and

o     is either (i) a federal savings and loan association duly organized,
     validly existing and in good standing under the federal banking laws, (ii)
     an institution duly organized, validly existing and in good standing under
     the applicable banking laws of any state, (iii) a national banking
     association duly organized, validly existing and in good standing under the
     federal banking laws and (iv) a principal subsidiary of a bank holding
     company, or

     (C) a trust account (which will be a "special deposit account") maintained
with the trust department of a federal or state chartered depository institution
or of a trust company, having capital and surplus of not less than $50 million,
acting in its fiduciary capacity.

     Any Eligible Account maintained with the Trustee will conform to the
preceding clause (C).

     ERISA: The Employee Retirement Income Security Act of 1974.

     ERISA Restricted Certificates: The B-4, B-5 and B-6 certificates and each
class of ratio-stripped IO certificates.

     Exchange Act: The Securities Exchange Act of 1934.

     extraordinary event: Any of the following events: (i) hostile or warlike
action in time of peace or war; (ii) the use of any weapon of war employing
atomic fission or radioactive force whether in time of peace or war; or (iii)
insurrection, rebellion, revolution, civil war or any usurped power or action
taken by any governmental authority in preventing such occurrences (but not
including looting or rioting occurring not in time of war).

     FDIC: The Federal Deposit Insurance Corporation.

     FHLMC: The Federal Home Loan Mortgage Corporation.

     Fitch: Fitch Ratings.

     fraud loss limit: If an initial fraud loss limit is stated in the Series
Terms, for a distribution day,

     (X) prior to the second anniversary of the cut-off date, the initial fraud
loss limit minus the aggregate amount of fraud losses since the cut-off date,
and


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<PAGE>

     (Y) from the second through fifth anniversary of the cut-off date, (1) the
lesser of (a) the fraud loss limit as of the most recent anniversary of the
cut-off date and (b) 0.50% of the aggregate scheduled principal balance of all
the mortgage loans as of the most recent anniversary of the cut-off date, minus
(2) the aggregate amount of fraud losses since the most recent anniversary of
the cut-off date.

     After the fifth anniversary of the cut-off date the fraud loss limit will
be zero.

     fraud loss: A liquidated loan loss as to which there was fraud in the
origination of the mortgage loan.

     GIC: A guaranteed investment contract or surety bond.

     GNMA: the Government National Mortgage Association.

     group: In a multiple-pool series, the classes related to a pool; in a
single-pool series, all the classes.

     group target-rate class percentage: For one or more target-rate classes of
a group, the ratio of the classes' principal balance to the principal balance of
all target-rate classes of the group, expressed as a percentage. For a single
pool series, the group target-rate class percentage is the same as the
target-rate class percentage.

     Guide: The CitiMortgage, Inc. Servicing Guide, being the manual relating to
CitiMortgage's mortgage loan purchase program, as revised or supplemented from
time to time.

     high-cost mortgage loan: A "high cost loan," "high-rate, high-fee
mortgage," "covered loan," or similar loan under any predatory lending law, if
the law contains provisions that may result in liability of the Trust Fund as a
purchaser or assignee of the loan.

     holder: Has the same meaning as "certificate holder."

     hypothetical mortgage loan: A non-existent mortgage loan that, combined
with one or more other hypothetical mortgage loans, would have the same interest
and principal payments as an actual mortgage loan.

     Example: A mortgage loan having a principal balance of $100,000 and a
pass-through rate of 8% could be divided into two hypothetical mortgage loans,
the first having a $100,000 principal balance and a pass-through rate of 7% per
annum, and the second an IO loan having a $100,000 principal balance and a
pass-through rate of 1% per annum. References to the hypothetical mortgage loans
in the target-rate strip will include those actual mortgage loans whose
pass-through rates equal the target rate.

     independent accountants: Accountants who are "independent" within the
meaning of Rule 2-01(b) of the Securities and Exchange Commission's Regulation
S-X under the Exchange Act.

     Indirect Participant: An organization that participates in the Clearing
Agency by clearing through or by maintaining a custodial account with a
Participant.

     initial: As applied to a principal or notional balance, target-rate class
percentage, or subordination level, means the principal or notional balance,
target-rate class percentage, or subordination level as of the cut-off date.

     insurance proceeds: Proceeds of

o     a primary mortgage insurance policy,

o     a hazard insurance policy to the extent not applied to restore the
     mortgaged property or released to the mortgagor in accordance with
     CitiMortgage's normal servicing procedures or, for a third-party servicer,
     the Guide, and

o     any other insurance policy or bond relating to the mortgage loans or their
     servicing.

     Internal Revenue Code: The Internal Revenue Code of 1986.

     investment account: The certificate account (but only if so stated in the
Series Terms) and any other account or any portion


                                       38

<PAGE>

thereof that consists of cash or Eligible Investments.

     Investment Income: Any and all investment income and gains, net of any
losses, actually received on the investment of funds on deposit in all
investment accounts.

     IO class: A class that has a certificate rate but no principal balance,
receives interest distributions on its notional balance, but does not receive
principal distributions.

     IO loan: A mortgage loan having only a "notional balance." Such a mortgage
loan would pay interest (usually at a variable rate) on its notional balance,
but would not pay principal.

     IO strip: The ratio-stripped IO loans for all the premium loans.

     liquidated loan: A mortgage loan for which

o     the related mortgaged property has been acquired, liquidated or foreclosed,
      and the relevant servicer determines that all liquidation proceeds it
     expects to recover have been recovered, or

o     the related mortgaged property is retained or sold by the mortgagor, and
     the relevant servicer has accepted payment from the mortgagor in
     consideration for the release of the mortgage in an amount that is less
     than the outstanding principal balance of the mortgage loan as a result of
     a determination by the relevant servicer that the potential liquidation
     expenses for the mortgage loan would exceed the amount by which the cash
     portion of such payment is less than the outstanding principal balance of
     the mortgage loan.

     liquidated loan loss: For a distribution day, the aggregate losses for each
mortgage loan that became a liquidated loan prior to the first day of the month
that contains the distribution day, which for each such liquidated loan will
equal the excess of

o     (A) the unpaid principal balance of the mortgage loan on the first day of
      the preceding month, plus (B) accrued interest in accordance with the
     amortization schedule at the time applicable to the mortgage loan at the
     applicable mortgage note rate from the first day of the month as to which
     interest was last paid on the mortgage loan through the last day of the
     month in which the mortgage loan became a liquidated loan, over

o     the net liquidation proceeds for the mortgage loan.

     Each liquidated loan loss will have an interest portion and a principal
portion. If net liquidation proceeds for the mortgage loan exceed the accrued
interest described in clause (B) above, the interest portion of the liquidated
loan loss will be zero; otherwise, the interest portion of the liquidated loan
loss will be the excess of the accrued interest described in clause (B) above
over such net liquidation proceeds. The principal portion of a liquidated loan
loss will equal the liquidated loan loss minus the interest portion of the
liquidated loan loss.

     liquidation expenses: For a liquidated loan, out-of-pocket expenses paid or
incurred by or for the account of the relevant servicer or the Trust Fund for
(a) property protection expenses, (b) property sales expenses, (c) foreclosure
costs, including court costs and reasonable attorneys' fees, (d) similar
expenses reasonably paid or incurred in connection with the liquidation of the
liquidated loan, (e) servicing fees not previously paid on the liquidated loan,
and (f) any tax imposed on the Trust Fund with respect to a liquidated loan or
property received by deed in lieu of foreclosure.

     liquidation proceeds: For a period, the amounts received by the relevant
servicer in connection with the liquidation of a liquidated loan, whether
through judicial or non-judicial foreclosure, proceeds of insurance policies,
condemnation proceeds, proceeds of a deficiency action (less amounts retained by
CitiMortgage pursuant to sec-


                                       39

<PAGE>

tion 3.12), or otherwise, including payments received from the mortgagor for the
liquidated loan, other than amounts required to be paid to the mortgagor
pursuant to the terms of the liquidated loan or to be applied otherwise pursuant
to law.

     loss recovery: For a liquidated loan, any amounts received on the
liquidated loan (net of expenses on the liquidated loan) for any month after the
month in which the mortgage loan becomes a liquidated loan, that are not applied
to the reduction of aggregate outstanding advances for the liquidated loan.

     master servicing fee: The amount payable to CitiMortgage pursuant to
section 3.7.

     master servicing fee rate: The per annum rate agreed between CitiMortgage
and a third-party servicer for calculating the master servicing fee. The monthly
master servicing fee rate will be one-twelfth of the master servicing fee rate.

     month: A calendar month.

     Moody's: Moody's Investors Service, Inc.

     mortgage: For a mortgage loan, the mortgage or deed of trust creating a
first lien on and an interest (a) for a mortgage loan relating to a cooperative
apartment in a cooperative housing corporation, in the mortgagor's interest
therein securing a mortgage note, and (b) for other cases, in real property
securing a mortgage note.

     mortgage documents: All documents contained in the mortgage file.

     mortgage file: The mortgage documents listed in section 2.1 pertaining to a
particular mortgage loan and any additional documents required to be added to
such documents pursuant to this agreement.

     mortgage loan: At any time, the indebtedness of a mortgagor evidenced by a
mortgage note that is secured by real property (or shares evidencing ownership
interest in a cooperative apartment in a cooperative housing corporation) and
that is sold and assigned to the Trustee and held at such time in the Trust Fund
pursuant to this agreement, the mortgage loans originally so held being
identified in the mortgage loan schedule.

     mortgage loan schedule: The list of mortgage loans transferred to the
Trustee as part of the Trust Fund, attached as exhibit B, or separately
delivered, in physical or electronic form, to the Trustee.

     mortgage note: For a mortgage loan, the promissory note or other evidence
of indebtedness of the mortgagor.

     Mortgage Note Custodian: The Mortgage Document Custodian is also designated
by CMSI as the Mortgage Note Custodian. At any time that the rating agencies'
respective rating of Citigroup Inc.'s long-term senior debt is below the
respective rating assigned by each such rating agency to the certificates, the
Mortgage Note Custodian may not be an affiliate of CMSI.

     mortgage note rate: For a mortgage loan, the annual rate per annum at which
interest accrues on the mortgage loan.

     mortgaged property: Any real property subject to a mortgage, or any
cooperative apartment in a cooperative housing corporation.

     mortgagor: The obligor on a mortgage note.

     multiple-pool series: A series in which the mortgage loans are divided into
two or more pools for purposes of allocations and distributions. Each series is
either a single-pool series or a multiple-pool series.

     net liquidation proceeds: For a period, the aggregate amount of liquidation
proceeds for a liquidated loan, net of related liquidation expenses not
previously recovered.

     net REO proceeds: For a REO loan, REO proceeds net of any related expenses
of the relevant servicer.

     net Paying Agent advances: For a period, the amount (which may be negative)
ob-


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<PAGE>

tained by subtracting the amount of any reimbursements for Paying Agent advances
received in the period from the aggregate amount of Paying Agent advances made
in the period.

     net voluntary advances: For a period, the amount (which may be negative)
obtained by subtracting the amount of any reimbursements for voluntary advances
received in the period from the aggregate amount of voluntary advances made in
the period.

     nonrecoverable advance: Any portion of a voluntary advance or Paying Agent
advance previously made or proposed to be made in respect of a mortgage loan
that has not been previously reimbursed to the relevant servicer or the Paying
Agent and that, in the good faith judgment of such person, would not be
ultimately recoverable from liquidation proceeds or other recoveries in respect
of the related mortgage loan. Nonrecoverable advances also include any advance
by CitiMortgage of part or all of the shortfall in interest collections on a
mortgage loan due to the federal Servicemembers Civil Relief Act or any similar
state legislation that cannot be recouped from later payments on the mortgage
loan. The determination by such person that it has made a nonrecoverable advance
or that any proposed advance, if made, would be a nonrecoverable advance, will
be evidenced by a certification of a Servicing Officer delivered to the Trustee
and the Paying Agent and detailing the basis for such determination, but any
delay or failure to send such certification will not impair such person's right
to withhold or recover such advance.

     non-subordinated losses: (1) Special hazard, fraud or bankruptcy losses
that exceed the then-applicable limit for that type of loss, (2) realized losses
from extraordinary events, and (3) interest shortfalls due to limitations on
interest rates mandated by the federal Servicemembers Civil Relief Act or any
comparable state laws.

     non-supported prepayment interest shortfall: For a distribution day and a
class (other than a PO class), the class's proportional share, based on interest
accrued, of the sum of (1) for affiliated mortgage loans, the excess, if any, of
the prepayment interest shortfalls on such mortgage loans for that distribution
day over the amount deposited in the distribution account by CitiMortgage
pursuant to section 3.4 in connection with prepayment interest shortfalls, and
(2) for third-party mortgage loans, any excess of the prepayment interest
shortfalls on such mortgage loans for that distribution day over the aggregate
amount deposited in the certificate account in respect thereof by the applicable
third-party servicers as required by section 3.4 and the Guide.

     officer's certificate: A certification signed by an Authorized Officer of
CitiMortgage or CMSI and delivered to the Trustee or Paying Agent.

     opinion of counsel: A written opinion of counsel, who (unless otherwise
specified herein) may be counsel for, or an employee of, CMSI or an affiliate of
CMSI, which counsel will be reasonably acceptable to the Trustee.

     order of seniority: For the target-rate classes, the following order: the
senior classes, followed by classes B-1, B-2, B-3, B-4, B-5 and B-6.

     order of subordination: For the target-rate classes, the following order:
classes B-6, B-5, B-4, B-3, B-2 and B-1, followed by the senior classes.

     original value: For the mortgaged property underlying a mortgage loan, the
lesser of

o     the sales price of the mortgaged property and

o     its appraisal value determined pursuant to an appraisal made in connection
     with origination of the mortgage loan, except


                                       41

<PAGE>

     that the original appraisal of the mortgaged property may be used for a
     refinanced mortgage loan the unpaid principal balance of which, after
     refinancing, does not exceed the unpaid principal balance of the original
     mortgage loan at the time of refinancing by an amount greater than the
     amount of the closing costs associated with the refinancing.

     The original value of a mortgage loan is the original value of the
mortgaged property underlying the mortgage loan plus the value of any other
property securing the mortgage loan.

     Originator: The affiliate or affiliates of CMSI, or the third-party
originators, from which CMSI is acquiring the mortgage loans.

     outstanding: (1) For certificates as of any date, all certificates
previously authenticated and delivered under this agreement except:

     (i) certificates that have been canceled by the Certificate Registrar or
delivered to the Certificate Registrar for cancellation;

     (ii) certificates for which money for a distribution in the necessary
amount to reduce the principal balance to zero has been deposited with the
Paying Agent in trust for the holders of such certificates; provided, however,
that if a distribution in reduction of the principal balance of such
certificates to zero will be made, notice of the distribution has been duly
given pursuant to this agreement or provision therefor, satisfactory to the
Trustee, has been made;

     (iii) certificates in exchange for or in lieu of which other certificates
have been authenticated and delivered pursuant to this agreement unless proof
satisfactory to the Certificate Registrar is presented that any such
certificates are held by a protected purchaser under Article 8 of the Uniform
Commercial Code in effect in the applicable jurisdiction; and

     (iv) certificates alleged to have been destroyed, lost or stolen for which
replacement certificates have been issued as provided for in section 5.3 and
authenticated and delivered pursuant to this agreement;

     provided, however, that in determining whether the holders of the requisite
percentage of the aggregate principal balance or percentage interest of any
outstanding certificates or of the outstanding certificates of any one or more
classes have given any request, demand, authorization, direction, notice,
consent or waiver, such percentage will be based on the principal balance of
such certificate and provided, further, certificates owned by CMSI or any other
obligor upon the certificates or any affiliate of CMSI or such other obligor
will be disregarded and deemed not to be outstanding, except that, in
determining whether the Trustee will be protected in relying upon any such
request, demand, authorization, direction, notice, consent, or waiver, only
certificates which the Trustee knows to be so owned will be so disregarded and
except that where CMSI or any other obligor upon the certificates or any
affiliate of CMSI or such other obligor will be owner of 100% of the aggregate
principal balance or percentage interest of any outstanding certificates, CMSI
or such other obligor or affiliate will be permitted to give any request,
demand, authorization, direction, notice, consent or waiver hereunder.
Certificates so owned that have been pledged in good faith may be regarded as
outstanding if the pledgee establishes to the satisfaction of the Trustee the
pledgee's right so to act with respect to such certificates and that the pledgee
is not CMSI or any other obligor upon the certificates or any affiliate of CMSI
or such other obligor.

     (2) for a class for any day, a class with a non-zero principal balance or
non-zero notional balance on that day, and


                                        42

<PAGE>

     (3) for a mortgage loan, for the first day of a month, a mortgage loan
that, prior to such first day, was not the subject of a principal prepayment in
full, did not become a liquidated loan, and was not purchased pursuant to
section 2.2 or 2.3.

     Participant: A participating organization in the Clearing Agency.

     pass-through rate: For a mortgage loan for any date or period, the
applicable mortgage note rate, minus

o     for an affiliated mortgage loan, the affiliated servicing fee rate, and

o     for a third-party mortgage loan, the sum of the third-party servicing fee
     rate and the master servicing fee rate.

Any regular monthly remittance of interest at the pass-through rate for a
mortgage loan is based upon annual interest at that rate on the scheduled
principal balance as of the first day of the month of the mortgage loan divided
by twelve. Interest at the pass-through rate will be computed on the basis of a
360-day year, each month being assumed to have 30 days. The monthly pass-through
rate will be one-twelfth of the pass-through rate.

     (Any partial remittance of interest at such rate by reason of a full
principal prepayment is based upon annual interest at that rate on the prepaid
principal balance of the related mortgage loan, multiplied by a fraction the
numerator of which is the actual number of days elapsed in the month of the
prepayment to the date of the prepayment, and the denominator of which is 360.
For affiliated mortgage loans, and some or all of the third-party mortgage
loans, the mortgagor is not required to pay interest on a partial principal
prepayment that is received during a month. The amounts required to be paid
pursuant to section 3.4 are in addition to any interest payments made by
mortgagors and passed through on full and partial prepayments.)

     percentage interest: For a class of residual certificates, if the residual
certificate has a principal balance as specified in the Series Terms, the ratio
of the initial principal balance of the residual certificate to the aggregate
initial principal balance of the entire class, expressed as a percentage; if the
residual certificate does not have a principal balance, the portion represented
by such residual certificate (expressed as a percentage) of the total ownership
interest in the applicable constituent REMIC represented by all residual
certificates of the class. For a certificate of an IO class, the ratio of the
notional balance of the certificate to the aggregate notional balance of the
entire class.

     person: Any legal person, including any individual, corporation,
partnership, joint venture, association, joint stock company, trust,
unincorporated organization or government or any agency or political subdivision
thereof.

     PO class: A class that has a principal balance and receives principal
distributions, but does not have a certificate rate and does not receive
interest distributions.

     PO loan: A mortgage loan that has a principal balance, but on which no
interest is paid by the mortgagor. PO strip: The ratio-stripped PO loans for all
the discount loans.

     pool: A pool of mortgage loans.

     pool distribution amount: For a distribution day and a mortgage loan pool,
the funds eligible for distribution to the related classes on that distribution
day, being all amounts deposited into the certificate account relating to that
pool, but excluding the following:

     (a) uncommitted cash that will not be used on the distribution day for an
uncommitted cash advance;

     (b) all permitted withdrawals from the certificate account pursuant to
section 3.8; and


                                       43

<PAGE>

     (c) all income from Eligible Investments that are held in an investment
account.

     predatory lending law: The Georgia Fair Lending Act, the Maine Consumer
Credit Code - Truth-in-Lending, the New Jersey Home Ownership Security Act of
2002, the New Mexico Home Loan Protection Act, the New York Predatory Lending
Act, or any similar state, local or federal law that regulates high-cost
mortgage loans.

   Predecessor Certificates: For a particular certificate of a class, every
previous certificate of that class evidencing all or a portion of the same
principal balance, notional balance or percentage interest as that evidenced by
the particular certificate; for the purpose of this definition, any certificate
authenticated and delivered under section 5.3 in lieu of a lost, destroyed or
stolen certificate will be deemed to evidence the same principal balance,
notional balance or percentage interest, as the case may be, as the lost,
destroyed or stolen certificate.

     premium loan: A mortgage loan having a pass-through rate equal to or
greater than the target rate.

     prepayment interest shortfall: For a mortgage loan that was the subject of
a principal prepayment applied during the preceding month, an amount equal to
(1) one month of interest on the principal prepayment at the pass-through rate,
less (2) the amount of any interest (adjusted to the pass-through rate) on the
principal prepayment received from the mortgagor.

     primary mortgage insurance certificate: The certificate of primary mortgage
insurance relating to a particular mortgage loan to the extent initially set
forth in the mortgage loan schedule.

     principal prepayment: For a mortgage loan, a payment of principal on the
mortgage loan that is received in advance of the date it is scheduled to be paid
and that is not accompanied by an amount representing scheduled interest for any
month subsequent to the month of prepayment, but excluding any proceeds of or
advances on a liquidated loan.

     private certificates: The residual certificates and certificates of classes
B-4 through B-6 and, unless otherwise stated in the Series Terms, any
ratio-stripped IO classes.

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

     property protection expenses: For mortgage loans, expenses paid or incurred
by or for the account of CitiMortgage or the Trust Fund in accordance with the
related mortgages for (a) real estate property taxes and property repair,
replacement protection and preservation expenses, and (b) similar expenses
reasonably paid or incurred to preserve or protect the value of the mortgages.

     Qualified GIC: A GIC, assigned to the Trustee or Paying Agent, or entered
into by the Trustee or Paying Agent at the direction of CMSI, on or before the
closing date, providing for the investment of funds insuring a minimum or fixed
rate of return on investments of such funds, which contract or surety bond will

     (a) be an obligation of an insurance company, trust company, commercial
bank (which may be Citibank, N.A. or a Citibank banking affiliate) or other
entity whose credit standing is confirmed in writing as acceptable by each
rating agency;

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

     (c) provide that if at any time (subject to the second proviso of this
section (c)) the then current credit standing of the obligor under such
guaranteed investment contract is such that continued investment pursuant to
such contract of funds included in the


                                        44

<PAGE>

Trust Fund would result in a downgrading of any rating of any class of the
certificates, the Trustee or the Paying Agent may terminate such contract and be
entitled to the return of all funds previously invested thereunder, together
with accrued interest thereon at the interest rate provided under such contract
through the date of delivery of such funds to the Trustee or the Paying Agent,
provided that the Trustee or the Paying Agent will not be charged with knowledge
of any such potential downgrading unless it will have received written notice of
such potentiality from the provider of the GIC which must be obligated to give
such notice at least once per year; provided, further, that upon any such event
CMSI, by written notice to the Trustee or the Paying Agent, may replace such
contract with a substitute GIC having substantially the same terms (including
without limitation a rate of return at least as high as the contract being
replaced) so long as such substitute contract has an obligor with a credit
standing no less than the credit standing of the obligor under the contract to
be replaced at the time the contract was executed and such fact is certified by
CMSI to the Trustee or the Paying Agent;

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

     (e) provide that the funds invested thereunder and accrued interest thereon
be available not later than the day prior to any distribution day on which such
funds may be required for distribution hereunder; and

     (f) meet such other standards as may be specified in the Series Terms.

     Qualified Nominee: A person (who may not be CMSI or an affiliate of CMSI)
in whose name Eligible Investments held by the Trustee or Paying Agent may be
registered as nominee of the Trustee or the Paying Agent in lieu of registration
in the name of the Trustee or the Paying Agent, provided that the following
conditions will be satisfied in connection with such registration:

     (a) the instruments governing the creation and operation of the nominee
provide that neither the nominee nor any owner of an interest in the nominee
(other than the Trustee or the Paying Agent) will have any interest, beneficial
or otherwise, in any Eligible Investments held in the name of the nominee,
except for the purpose of transferring and holding legal title thereto;

     (b) the nominee and the Trustee or the Paying Agent have entered into a
binding agreement in substantially the form to be provided by CMSI establishing
that any Eligible Investments held in the name of the nominee are to be held by
the nominee as agent (other than commission agent or broker) or nominee for the
account of the Trustee; and

     (c) in connection with the registration of any Eligible Investment in the
name of the nominee, all requirements under applicable governmental regulations
necessary to effect a valid registration of transfer of such Eligible Investment
are complied with as evidenced to the Trustee and the Paying Agent upon its
request by an opinion of counsel.

     ratio-stripped IO class: An IO class with an initial notional balance equal
to the initial notional balance of one or more IO strips, and that receives
interest distributions solely from distribution on those strips.

     ratio-stripped IO loan: For any premium loan with a pass-through rate
greater than the target rate, a single hypothetical IO loan that, combined with
a single hypothetical target-rate loan, has the same interest and principal
payments as the premium loan.

     Example: For a premium loan with a $100,000 principal balance and a
pass-through rate 1% per annum greater than the target rate, the (hypothetical)
ratio-stripped IO loan will


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<PAGE>

have a notional balance of $100,000 and a pass-through rate of 1% per annum, and
the (hypothetical) target-rate loan will have a principal balance of $100,000
and a pass-through rate equal to the target rate.

     ratio-stripped PO class: A PO class whose initial principal balance equals
the initial principal balance of one or more PO strips (rounded down to the
nearest whole dollar), and that receives principal distributions solely from
distribution on those strips, or from reimbursements from subordinated classes.

     ratio-stripped PO loan: For any discount loan, a single hypothetical PO
loan that, combined with a single hypothetical target-rate loan, has the same
interest and principal payments as the original discount loan.

     Example: For a discount loan with a $100,000 principal balance and a
pass-through rate 1% per annum less than the target rate of 5% per annum, the
(hypothetical) ratio-stripped PO loan will have a principal balance of $20,000
and a pass-through rate of 0%, and the (hypothetical) target-rate loan will have
a principal balance of $80,000 and a pass-through rate equal to the target rate.

     realized losses: For a distribution day, liquidated loan losses (including
special hazard losses and fraud losses) and bankruptcy losses incurred in the
preceding month. For a realized loss consisting of a liquidated loan loss, the
interest and principal portions of the realized loss will equal the interest and
principal portions of the liquidated loan loss.

     record date: For a distribution day, the close of business on (a) for a
LIBOR class, the last day (whether or not a business day) of its last LIBOR
accrual period preceding the distribution day, and (b) for any other class, the
last day of the preceding month.

     relevant servicer: CitiMortgage or a third-party servicer, as the context
requires.

     REMIC: A "real estate mortgage investment conduit" within the meaning of
Internal Revenue Code Section 860D. References to the "REMIC" are to the
constituent REMICs constituted by the Trust Fund.

     REMIC Provisions: The provisions of the federal income tax law relating to
REMICs, which appear at Sections 860A through 860G of the Internal Revenue Code.

     REO loan: A mortgage loan that is not a liquidated loan and as to which the
related mortgaged property is held as part of the Trust Fund.

     REO proceeds: Proceeds, net of any related expenses, received in respect of
any REO loan (including, without limitation, proceeds from the rental of the
related mortgaged property).

     REO property: A mortgaged property acquired by the Trust Fund through
foreclosure or deed-in-lieu of foreclosure in connection with a defaulted
mortgage loan or otherwise treated as having been acquired pursuant to the REMIC
Provisions.

     Required Amount of Certificates: (i) 2/3 or more of the aggregate voting
interest of the outstanding certificates, if affected by the occurrence of an
Event of Default and (ii) 2/3 or more of the aggregate outstanding percentage
interest of the residual certificates, if affected by such an Event of Default.

     Responsible Officer of the Trustee means an officer who is employed in the
Corporate Trust Department or a similar group for the Trustee with direct
responsibility for the administration of this agreement.

     S&P: Standard and Poor's Ratings Services, a division of The McGraw- Hill
Companies, Inc.

     scheduled monthly loan payment: For a mortgage loan (including a REO loan)
and a distribution day, the payment of principal and interest due on the first
day of the month in which the distribution day occurs


                                       46

<PAGE>

in accordance with the amortization schedule applicable to the mortgage loan at
that time (after adjustment for any partial principal prepayments or deficient
valuations occurring prior to such first day of the month but before any
adjustment to such amortization schedule other than deficient valuations by
reason of any bankruptcy, or similar proceeding or any moratorium or similar
waiver or grace period).

     scheduled principal balance: For one or more mortgage loans on a date, the
initial principal balance of the loans, less the sum of (a) the aggregate of the
principal portion of all scheduled monthly loan payments required to be made on
the loans on or before the first day of the month in which the date falls
(whether or not received), provided that after the bankruptcy coverage
termination date, the scheduled principal balance will not be reduced by the
principal portion of any debt service reductions, and (b) any principal
prepayments on the loans received or posted before the close of business on the
last business day of the preceding month.

     scheduled principal payments: For one or more mortgage loans for a
distribution day, the principal portion of the scheduled monthly loan payments
on the loans for the distribution day.

   scheduled servicing fee: For any month, a fee equal to

o     for each affiliated mortgage loan, the scheduled principal balance of the
     mortgage loan as of the close of business on the last day of the preceding
     month, multiplied by the monthly affiliated servicing fee rate, and

o     for each third-party mortgage loan, the scheduled principal balance of the
     mortgage loan as of the close of business on the first day of the month,
     multiplied by the relevant monthly third-party servicing fee rate.

     Securities Act: The Securities Act of 1933.

     senior to: A target-rate class is senior to another target-rate class if it
is ranked above it in order of seniority.

     Servicing Officer: Any officer of CitiMortgage, a delegated servicer or a
third-party servicer involved in, or responsible for, the administration and
servicing of the Trust Fund whose name appears on a list of servicing officers
attached to an officer's certificate furnished to the Trustee by CitiMortgage,
as such list may from time to time be amended.

     single certificate: A single certificate evidences (a) for a residual
certificate, 1% percentage interest, (b) for a certificate of an IO class,
$1,000 initial notional balance, and (c) for a certificate of any other class,
$1,000 initial principal balance.

     single-pool series. A series in which the mortgage loans are not divided
into two or more pools for purposes of allocations and distributions. Each
series is either a single-pool series or a multiple-pool series.

     special hazard loss: (i) A liquidated loan loss suffered by a mortgaged
property on account of direct physical loss, exclusive of (a) any loss covered
by a hazard policy or a flood insurance policy maintained for the mortgaged
property pursuant to section 3.11, and (b) any loss caused by or resulting from:

     (1) normal wear and tear;

     (2) infidelity, conversion or other dishonest act on the part of the
Trustee, CitiMortgage or any of their agents, employees or delegees; or

     (3) errors in design, faulty workmanship or faulty materials, unless the
collapse of the property or a part thereof ensues; or

     (ii) a liquidated loan loss suffered by the Trust Fund arising from or
related to the presence or suspected presence of hazardous wastes or hazardous
substances on a mortgaged property, unless the loss to a mortgaged property is
covered by a hazard


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<PAGE>

policy or a flood insurance policy maintained for the mortgaged property
pursuant to section 3.11.

     special hazard loss limit: If an initial special hazard loss limit is
stated in the Series Terms, for a distribution day, the initial special hazard
loss limit minus the sum of (i) the aggregate amount of special hazard losses
and (ii) the Adjustment Amount (as defined below) as most recently calculated.
For each anniversary of the cut-off date, the Adjustment Amount will be the
excess of the amount calculated in accordance with the preceding sentence
(without giving effect to the deduction of the Adjustment Amount for such
anniversary) over the greater of (A) the product of the special hazard
percentage for such anniversary multiplied by the aggregate scheduled principal
balance of all the mortgage loans on the distribution day immediately preceding
such anniversary and (B) twice the scheduled principal balance of the mortgage
loan in the Trust Fund which has the largest scheduled principal balance on the
distribution day immediately preceding such anniversary.

     special hazard percentage: As of each anniversary of the cut-off date, the
greater of (i) 1% and (ii) the largest percentage obtained by dividing the
aggregate scheduled principal balances (as of the immediately preceding
distribution day) of the mortgage loans secured by mortgaged properties located
in a single, five-digit ZIP code area in the State of California by the
aggregate scheduled principal balance of all the mortgage loans as of such
anniversary.

     subordinated losses: Realized losses other than non-subordinated losses.

     subordinate to: A target-rate class is subordinate to another target-rate
class if it is ranked below it in order of seniority.

     subordination depletion date: The first distribution day for which the
principal balance of the subordinated classes on the preceding day is zero.

     target-rate class percentage: For one or more target-rate classes, the
ratio of the classes' principal balance to the principal balance of all
target-rate classes, expressed as a percentage.

     target-rate loan: For any mortgage loan, a single hypothetical mortgage
loan that has a pass-through rate equal to the target rate, and

     (i) if the mortgage loan has a pass-through rate equal to or greater than
the target rate, has the same principal balance as the mortgage loan, and

     (ii) if the mortgage loan is a discount loan, has a principal balance equal
to the product of (A) the principal balance of the mortgage loan and (B) the
ratio of the pass-through rate for the mortgage loan to the target-rate.

     target-rate strip: The mortgage loan pool formed of the target-rate loans
for all the mortgage loans.

     third-party servicing fee: For any month, a fee for each third-party
mortgage loan equal to the lesser of (a) the scheduled principal balance of the
mortgage loan as of the close of business on the first day of the month,
multiplied by the relevant monthly third-party servicing fee rate, and (b) the
excess of the interest payment received on the mortgage loan for the month
(including interest payments included in liquidation or insurance proceeds) over
the amount of the interest payment to be deposited in the certificate account.

     third-party servicing fee rate: For a third-party mortgage loan other than
a special serviced mortgage loan, the per annum rate specified as such on
schedule B-TP to exhibit B under the heading "Sub Fee," reduced (but not below
zero) by any applicable master servicing fee rate, and for a special serviced
mortgage loan, the per annum


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<PAGE>

servicing fee rate for the special servicer provided for in the special
servicing agreement. The monthly third-party servicing fee rate will be
one-twelfth of the relevant third-party servicing fee rate.

     Transfer Instrument: A deed transferring an interest in property subject to
a mortgage.

     Trust Fund: The corpus of the trust created by this agreement, consisting
of the mortgage loans, the certificate account, any pooling, lower-tier, or
upper-tier REMIC account, REO property and the primary mortgage insurance
certificates, any other insurance policies for the mortgage loans, any retail
reserve fund and the rights of the Trustee under any reserve fund and any
certificate insurance policy.

     uncommitted cash: For a distribution day, any cash in the certificate
account representing principal prepayments posted or liquidation proceeds
deposited on or after the first day of the month immediately preceding such
distribution day and all related payments of interest and all payments which
represent early receipt of scheduled payments of principal and interest due on a
date or dates subsequent to such first day of the month.

     unscheduled principal payments: For one or more mortgage loans for a
distribution day, the sum of

o     all principal prepayments on the mortgage loans received by CitiMortgage or
     a third-party servicer during the month preceding the distribution day, up
     to the scheduled principal balance, in each case, of the mortgage loan,

o     the greater of (1) aggregate net liquidation proceeds from any of the
     mortgage loans that became a Liquidated Loan during the month preceding
     such distribution day, minus (a) the portion of such proceeds representing
     interest, and (b) any unreimbursed advances of principal made by the
     CitiMortgage, a third-party servicer, or the Paying Agent on such mortgage
     loans, and (2) the aggregate scheduled principal balances of such mortgage
     loans for the distribution day, and

o     the scheduled principal balance of any of the mortgage loans that was
     repurchased by CMSI during such month pursuant to section 2.3, "Repurchase
     or substitution of mortgage loans" below.

     U.S. person: A citizen or resident of the United States of America, a
corporation or partnership (unless, in the case of a partnership, Treasury
regulations are adopted that provide otherwise) created or organized in or under
the laws of the United States of America, any state thereof or the District of
Columbia, including an entity treated as a corporation or partnership for
federal income tax purposes, an estate whose income is subject to U.S. federal
income tax regardless of its source, or a trust if a court within the United
States is able to exercise primary supervision over the administration of such
trust, and one or more such U.S. persons have the authority to control all
substantial decisions of such trust (or, to the extent provided in applicable
Treasury regulations, certain trusts in existence on August 20, 1996 which are
eligible to elect to be treated as U.S. persons).

1.2   USAGES

In this agreement and the certificates, unless otherwise stated or the context
otherwise clearly requires, the following usages apply:

o     "This agreement," "herein," "hereof" and words of similar import when used
     in this agreement will refer to this agreement.

o     In computing periods from a specified date to a later specified date, the
     words "from" and "commencing on" (and the like) mean "from and including,"
     and the words "to," "until" and "ending on" (and the like) mean "to but
     excluding."


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<PAGE>

o     An action permitted under this agreement may be taken at any time and from
     time to time. Except as otherwise indicated, a permitted action may be
     taken in the actor's sole discretion. References to a person's taking
     action include the person's refraining from action. Thus, a statement that
     a person "may take any action that ... " means that a person may take or
     refrain from taking any action that ....

o     All indications of time of day mean New York City time.

o     "Including" means "including, but not limited to." "A or B" means "A or B
     or both."

o     References to an agreement (including this agreement) will refer to the
     agreement as amended at the relevant time.

o     References to numbered sections or paragraphs in this agreement will refer
     to sections or paragraphs of this agreement, and such section references
     will include all included sections. For example, a reference to section 6
     will be to section 6 of this agreement, and also to sections 4.1, 4.2, etc.

o     References to an exhibit in this agreement will refer to all included
     numbered subdivisions of the exhibit. For example, references to exhibit A
     will also refer to subdivisions A-1, A-2, etc.

o     References to a statute include all regulations promulgated under or
     implementing the statute, as in effect at the relevant time. References to
     a specific provision of a statute includes successor provisions.

o     References to any governmental or quasi-governmental agency or authority
     will include any successor agency or authority.

o     Where a decimal appears that has been shortened, it will be rounded
     according to the usual rules; that is, if the decimal is only shown to x
     places, the last number (in the xth place) will be raised by one if the
     following number (in the x+1st place) is 5, 6, 7, 8 or 9.

1.3 CALCULATIONS RESPECTING MORTGAGE LOANS

(a) In connection with all calculations required to be made pursuant to this
agreement for remittances on any mortgage loan, any payments on the mortgage
loans or any payments on any other assets included in a Trust Fund, the rules
set forth in this section 1.2 will be applied.

     (b) Calculations for remittances on mortgage loans will be made on a
mortgage-loan-by-mortgage-loan basis, based upon current information as to the
terms of such mortgage loans and reports of payments received on such mortgage
loans supplied to CitiMortgage by the person responsible for the servicing
thereof and satisfying such requirement, if any, as may be set forth in section
3.

      (c) Each remittance receivable on a mortgage loan will be assumed to be
received on the first day of the month.

2     TRANSFER OF MORTGAGE LOANS AND ISSUANCE OF CERTIFICATES; REPURCHASE AND
     SUBSTITUTION

2.1 TRANSFER OF MORTGAGE LOANS

(a) CMSI, as of the closing date, hereby transfers and assigns to the Trustee,
without recourse, all of CMSI's right, title and interest in and to

o     the mortgage loans, including all remittances received or receivable by
     CMSI on or with respect to the mortgage loans (other than payments of
     principal and interest due and payable on the mortgage loans, and principal
     prepayments thereon received, on or before the cut-off date), and

o     the proceeds of any title, primary mortgage, hazard or other insurance
     policies related to the mortgage loans.


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<PAGE>

     Such transfer and assignment is absolute, is made in exchange for the
certificates described in section 12, and is intended by the parties to be a
sale. Nonetheless, to the extent such transfer is held not to be a sale under
applicable law, it is intended that this agreement shall be a security agreement
under applicable law, and CMSI shall be deemed to have granted to the Trustee,
for the benefit of the certificate holders and any Insurer, a security interest
in the Trust Fund, including the mortgage loans, mortgage notes and related
documents. CMSI will, at its own expense, take any action reasonably requested
by the Trustee to confirm, perfect, and protect the priority of, the security
interest granted hereby, including the filing of Uniform Commercial Code
financing statements in the appropriate jurisdictions.

     CMSI will not transfer any other property to the Trust Fund except as
expressly permitted by this agreement.

     The Trustee acknowledges receipt of the documents and other property
referred to in section 2.1, and declares that the Trustee will hold such
documents and other property, including property yet to be received in the Trust
Fund, in trust, upon the trusts herein set forth, for the benefit of all present
and future certificate holders and any Insurer.

     (b) The Trustee and CitiMortgage have entered into a Mortgage Document
Custodial Agreement substantially in the form of exhibit C with the Mortgage
Document Custodian named in section 12.1. The Mortgage Document Custodian will
hold the mortgage documents in trust for the Trustee and the benefit of the
Trustee, any Insurer and all present and future certificate holders. The
Mortgage Document Custodian may be the Trustee, any affiliate of the Trustee, an
affiliate of CMSI, or an independent entity.

     The Trustee may at any time remove the initial or any successor Mortgage
Document Custodian, and enter into a Mortgage Document Custodial Agreement
substantially in the form of exhibit C hereto pursuant to which the Trustee
appoints a successor Mortgage Document Custodian to hold the Mortgage Documents
in trust for the Trustee and the benefit of the Trustee, all present and future
certificate holders, and any Insurer, which Agreement may provide that the
Mortgage Document Custodian shall conduct the review of each Mortgage File
required under the first paragraph of this section 2.1, except that, if the
Mortgage Document Custodian so appointed is CMSI or an affiliate of CMSI, the
Trustee may conduct such review.

     (c) CMSI will on or before the closing date deliver to the Mortgage
Document Custodian on behalf of the Trustee to be held in trust the following
documents or instruments for each mortgage loan (other than mortgage loans
secured by shares in a cooperative housing corporation) (except to the extent
CMSI is complying with section 2.1(f)):

     (i) The mortgage note, endorsed by manual or facsimile signature without
recourse by the Originator or an affiliate of the Originator in blank or to the
Trustee showing a complete chain of endorsements from the named payee to the
Trustee or from the named payee to the affiliate of the Originator and from such
affiliate to the Trustee, except that endorsement is not required where Mortgage
Electronic Registration Systems, Inc. (MERS) is the named payee or the nominee
of the named payee.

     (ii) The original recorded mortgage, with evidence of recording thereon or
a copy of the mortgage certified by the public recording office in those
jurisdictions where the public recording office retains the original.


                                       51

<PAGE>

     (iii) Any original assumption, modification, buydown or
conversion-to-fixed-interest-rate agreement applicable to the mortgage.

     (iv) An assignment from the Originator or an affiliate of the Originator to
the Trustee in recordable form of the mortgage which may be included, where
permitted by local law, in a blanket assignment or assignments of the mortgage
to the Trustee, including any intervening assignments and showing a complete
chain of title from the original mortgagee named under the mortgage to the
Originator or an affiliate of the Originator and to the Trustee, except that (x)
if the mortgage is registered with MERS, only assignments from the origination
of the mortgage to its assignment to MERS will be required, and (y) if the
mortgage was originated with MERS as the original mortgagee (a "MOM loan"), no
interim assignment will be required.

     (v) The original or a copy of the title insurance policy (which may be a
certificate or a short form policy relating to a master policy of title
insurance) pertaining to the mortgaged property, or in the event such original
title policy is unavailable, a copy of the preliminary title report and the
lender's recording instructions, with the original to be delivered within 180
days of the closing date or other evidence of title.

     (vi) Any related primary mortgage insurance certificate and related policy
or a copy thereof.

     (d) CMSI will on or before the closing date deliver to the Mortgage
Document Custodian on behalf of the Trustee to be held in trust the following
documents or instruments for each mortgage loan secured by shares in a
cooperative housing corporation (except to the extent CMSI is complying with
section 2.1(f)):

     (i) The mortgage note, endorsed by manual or facsimile signature without
recourse by the Originator or an affiliate of the Originator in blank or to the
Trustee showing a complete chain of endorsements and assignments from the named
payee to the Trustee or from the named payee to the affiliate of the Originator
and from such affiliate to the Trustee.

     (ii) The original mortgage, with evidence of recording thereon (if
recordation was required under applicable law).

     (iii) Any original assumption, modification, buydown or
conversion-to-fixed-interest-rate agreement applicable to the mortgage.

     (iv) The original stocks, shares, membership certificate or other
contractual agreement evidencing ownership;

     (v) The original stock power executed in blank.

     (vi) The original executed security agreement or similar document and all
assignments thereof showing a complete chain of assignment from the named
secured party to the Trustee.

     (vii) The original executed proprietary lease or occupancy agreement and
all assignments thereof showing a complete chain of assignment from the named
secured party to the Trustee.

     (viii) The original executed recognition agreement and any executed
assignments of recognition agreement showing a complete chain of assignment from
the named secured party to the Trustee.

     (ix) (Except for mortgage loans (x) secured by mortgaged properties in the
State of New Jersey or (y) originated prior to October 1988 and secured by
mortgaged properties in the State of New York) the executed UCC-1 financing
statement with evidence of recording thereon and executed original UCC-3
financing statements or other appropriate UCC financing statements required by
state law, evidencing a complete and unbroken chain from the


                                       52

<PAGE>

mortgagee to the Trustee with evidence of recording thereon (or in a form
suitable for recordation).

     (x) Any related primary mortgage insurance certificate and related policy.

     (e) CMSI will, on or before the closing date, deposit in the certificate
account

o     all payments on the mortgage loans that CMSI receives after the cut-off
     date and before the closing date, to the extent such payments are being
     transferred and assigned to the Trustee under this agreement, except any
     portion of such payments on mortgage loans (including servicing fees) of a
     type not required to be deposited therein as specified in section 11 or the
     Series Terms, and

o     any amount required to be so deposited under the Series Terms.

     (f) If CMSI is required under this section 2.1 to deliver an original
recorded mortgage or a completed assignment in recordable form to the Mortgage
Document Custodian by the closing date, but cannot do so because of a delay in
recording the mortgage, CMSI may instead

o     deliver a copy of the mortgage, provided that CMSI certifies that the
     original mortgage has been delivered to a title insurance company for
     recordation after receipt of its policy of title insurance or binder
     therefor (which may be a certificate relating to a master policy of title
     insurance), and

o     an assignment to the Trustee completed except for recording information.

     In all such instances, CMSI will deliver the original recorded mortgage and
completed assignment (if applicable) to the Mortgage Document Custodian promptly
upon receipt of such mortgage.

     If an original recorded mortgage has been lost or misplaced, CMSI or the
related title insurance company may deliver, in lieu of the mortgage, a copy of
the mortgage bearing recordation information and certified as true and correct
by the office in which the original mortgage was recorded.

     If CMSI cannot deliver the original or a copy of a title insurance policy
(which may be a certificate relating to a master policy of title insurance) for
a mortgaged property to the Mortgage Document Custodian by the closing date
because the policy is not yet available, CMSI may instead deliver a binder for
the policy, and deliver the original or a copy of the policy to the Trustee when
available.

     If CMSI cannot deliver an original assumption, modification, buydown or
conversion-to-fixed-interest-rate agreement to the Mortgage Document Custodian
by the closing date, CMSI may instead deliver a certified copy thereof. CMSI
will deliver the original assumption, modification, buydown or
conversion-to-fixed-interest-rate agreement to the Trustee promptly upon receipt
thereof.

     CMSI will, at its own expense, prepare and deliver to the Mortgage Document
Custodian each assignment referred to in clause (a)(iv) or (b)(vi) and (b)(ix)
above as soon as practicable but not later than 60 days after the date of
initial issuance of the certificates. For each mortgage relating to a mortgaged
property located in a state for which the rating agencies require recordation of
such assignments (as will be specified in the Series Terms or a CMSI officer's
certificate), CMSI intends to record the assignment in the appropriate public
office for real property records (or supply the Mortgage Document Custodian with
evidence of recordation) as soon as practicable after the initial issuance of
the certificates. Except as provided in this section, neither CMSI nor any
Originator or affiliate of any Originator will have any obligation to record any
assignment of any mortgage in order to name the Trustee as mortgagee of record.
The preceding sentence will not be in derogation of the obliga-


                                       53

<PAGE>

tion of CMSI, the Originators and affiliates of the Originators to record (and
supply the Mortgage Document Custodian with evidence thereof) assignments of
mortgages required in order that CMSI, an Originator or an affiliate of an
Originator be shown as mortgagee of record of each mortgage.

     CMSI will, at its own expense, record any UCC-3 financing statements not
previously recorded, and will supply the Mortgage Document Custodian with
evidence of the recordation. CMSI intends to effect recordation in the
appropriate public office as soon as practicable after the initial issuance of
the certificates.

     For mortgage loans that have been prepaid in full after the cut-off date
and prior to the closing date, CMSI, in lieu of delivering the above documents
to the Mortgage Document Custodian, will on the closing date deliver a
certification of a Servicing Officer as set forth in section 3.13.

      (g) Concurrently with the transfer and assignment to the Trustee of the
mortgage loans, the Trustee or the Authenticating Agent will, in accordance with
a written order or request signed in CMSI's name by an Authorized Officer,
authenticate and deliver to or upon CMSI's order, duly authenticated
certificates in authorized denominations evidencing the entire ownership of the
Trust Fund. The Trustee acknowledges that to the extent it holds any class P or
class L regular interests, it holds such regular interests as assets of the
lower-tier or upper-tier REMIC, as described in the Series Terms.

     (h) CMSI and the Trustee agree and understand that it is not intended that
any mortgage loan be included in the Trust that is a "High-Cost Home Loan," as
defined in either the Indiana High Cost Home Loan Law, effective January 1,
2005, the New Jersey Home Ownership Security Act of 2002, effective November 27,
2003, or the New Mexico Home Loan Protection Act, effective January 1, 2004, or
a "high cost home mortgage loan," as defined in the Massachusetts Predatory Home
Loan Practices Act, effective November 9, 2004.

2.2 CMSI'S REPRESENTATIONS AND WARRANTIES

CMSI represents and warrants to the Trustee and any Insurer that:

     (i) The information in exhibit B was true and correct in all material
respects as of the dates respecting which such information is furnished, and the
information provided to the rating agencies, including the loan-level detail, is
true and correct according to rating agency requirements.

      (ii) As of the closing date, each mortgage will be a valid first lien on
the property securing the related mortgage note subject only to

o     the lien of current real property taxes and assessments as limited in
     clause (vi) below, o covenants, conditions and restrictions, rights of way,
     easements and other matters of public record as of the date of recording of
     the mortgage, which exceptions appearing of record are acceptable to
     mortgage lending institutions generally or specifically reflected in the
     appraisal obtained in connection with the origination of the related
     mortgage loan,

o     other matters to which like properties are commonly subject that do not in
     the aggregate materially interfere with the benefits of the security
     intended to be provided by the mortgage, and

o     for a mortgage on a cooperative apartment in a cooperative housing
     corporation, the right of the related cooperative to cancel the related
     shares and terminate the proprietary lease for unpaid assessments (general
     and special) owed by the mortgagor;

     (iii) Immediately before the transfer and assignment of the mortgage loans
to the


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Trustee, CMSI has good title to, and is the sole legal owner of, each mortgage
loan (except as set forth in clause (v) below) and immediately upon the transfer
and assignment, CMSI will have taken all steps necessary so that the Trustee
will have good title to, and will be the sole legal owner of, each mortgage loan
(except as set forth in clause (v) below);

     (iv) As of the cut-off date, no payment of principal of or interest on any
mortgage loan was 30 days or more past due (a mortgage loan being considered 30
days past due in a given month when payment due on the first day of the prior
month has not been made on or before the last day of such prior month) or has
been 30 days or more past due more than once for the twelve months preceding the
cut-off date;

     (v) As of the closing date, there is no mechanics' lien or claim for work,
labor or material affecting the mortgaged property that is or may be a lien
prior to, or equal with, the lien of the mortgage except those that are insured
against by the title insurance policy referred to in (x) below;

     (vi) As of the closing date, there is no delinquent tax or assessment lien
against any mortgaged property;

     (vii) As of the closing date, there is no valid offset, defense or
counterclaim to any mortgage note or mortgage, including the obligation of the
mortgagor to pay the unpaid principal and interest on the mortgage note;

     (viii) As of the closing date, each mortgaged property is free of material
damage and is in good repair;

     (ix) Each mortgage at the time it was originated complied in all material
respects with applicable state, local and federal laws, including, without
limitation, all applicable usury, equal credit opportunity, recording,
disclosure and predatory lending laws. No mortgage loan is a high cost loan
under the predatory lending law of any jurisdiction in which a mortgaged
property is located, no mortgage loan is a "High Cost Loan" or "Covered Loan,"
as such terms are defined in the current version of Standard & Poor's LEVELS(R)
Glossary, (Version 5.6 Revised, Appendix E), and no mortgage loan originated on
or after October 1, 2002 through March 6, 2003 is governed by the Georgia Fair
Lending Act;

     (x) A lender's title insurance policy or binder approved as such by Fannie
Mae or the FHLMC, or other assurance of title customary in the relevant
jurisdiction, was issued on the date of the origination of each mortgage loan
(other than a mortgage loan for a cooperative apartment), and, as of the closing
date, each such policy, binder or assurance is valid and in full force and
effect;

     (xi) The mortgage loans conform in all material respects with their
descriptions in the prospectus relating to the certificates;

     (xii) Each mortgage loan with an original principal balance exceeding 80%
(or, for certain mortgage loans originated before 1995, 90%) of its original
value is covered by primary mortgage insurance at least until its outstanding
principal balance is less than or equal to 80% of the original value, either
through principal payments by the mortgagor or as determined by a new appraisal
delivered subsequent to origination. So long as it is in effect, the primary
mortgage insurance covers losses from defaults in an amount equal to the excess,
of the outstanding principal balance of the mortgage loan over 75% of the
original value of the mortgage loan;

     (xiii) The original principal balance of each mortgage loan was not more
than 95% of the original value of the mortgage loan;

     (xiv) For each buydown mortgage loan, the buydown funds deposited in the
buydown account, if any, will be sufficient, after crediting interest at the
rate per annum,


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if any, specified in the buydown agreement compounded monthly to the buydown
account and adding the amounts required to be paid by the mortgagor, to make the
scheduled payments stated in the mortgage note for the term of the buydown
subsidy agreement;

     (xv) Each mortgage loan is a "qualified mortgage" within the meaning of
Section 860G(a)(3) of the Internal Revenue Code.

     The representations and warranties in this section 2.2 will survive
delivery of the mortgage files to the Trustee.

2.3 REPURCHASE OR SUBSTITUTION OF MORTGAGE LOANS

     (a) Each of CMSI, CitiMortgage and the Trustee will promptly notify the
other parties if it discovers a breach of any of the representations and
warranties in section 2.2 that materially and adversely affects the interests of
the certificate holders or any Insurer in a mortgage loan (including a mortgage
loan substituted for a nonconforming mortgage loan pursuant to section 2.4) (a
material breach).

     (b) Pursuant to the Mortgage Document Custodial Agreement, the Mortgage
Document Custodian will review each mortgage file within 90 days after the
closing date to ascertain that all required documents have been executed,
received and recorded, if applicable, and that such documents relate to the
mortgage loans identified in exhibit B. If the Mortgage Document Custodian finds
that a document in a mortgage file is missing or materially defective, the
Mortgage Document Custodian will promptly notify CitiMortgage and CMSI by
e-mail.

     (c) If CMSI is notified of a material breach, CMSI will have 60 days after
the notice (or a longer period approved in advance in writing by a Responsible
Officer of the Trustee) to cure the breach in all material respects, or to
repurchase the mortgage loan or substitute eligible substitute mortgage loans,
as provided in this section 2.3.

     If CMSI is notified by the Mortgage Document Custodian that the
documentation for a mortgage loan is defective, CMSI will have 180 days after
the notice to cure the breach in all material respects, or to repurchase the
mortgage loan or substitute eligible substitute mortgage loans, as provided in
this section 2.3, except that CMSI will only have 90 days after the notice to
cure, cure, repurchase, or substitute if the defect causes the mortgage loan to
fail to be a "qualified mortgage" under Internal Revenue Code section
860G(a)(3).

     (d) Any repurchase by CMSI of a mortgage loan will be at a price equal to

     (i) 100% of the scheduled principal balance of the mortgage loan on the
date of repurchase, plus

     (ii) accrued and unpaid interest thereon at the pass-through rate to the
first day of the following month, plus

     (iii) any costs and damages incurred by the Trust Fund in connection with
any violation by such mortgage loan of any predatory lending law, plus

     (iv) aggregate outstanding advances for the mortgage loan, to the extent
not recovered in (ii) above.

     (e) CMSI will pay the repurchase price to CitiMortgage, which will promptly
deposit the repurchase price in the certificate account. A repurchase of a
mortgage loan under this section 2.3 will be considered a prepayment in full of
the mortgage loan on the date of repurchase. Upon the Trustee's receipt of
written notice of the deposit signed by an Authorized Officer of CitiMortgage,
the Trustee will direct the Mortgage Document Custodian to release the related
mortgage file to CMSI and will execute and deliver such instruments of transfer
or assignment furnished to the Trustee, in each case without recourse, as CMSI
reasonably


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requests, to vest the mortgage loan in CMSI. Repurchase of the mortgage loan by
CMSI will be deemed to include the right t