CITIBANK SOUTH DAKOTA N A
424B5, 1998-05-12
ASSET-BACKED SECURITIES
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<PAGE>

                                                      RULE NO. 424(b)(5)
                                                      REGISTRATION NO. 333-38803


 
PROSPECTUS SUPPLEMENT
(To Prospectus dated May 7, 1998)
 
                      CITIBANK CREDIT CARD MASTER TRUST I
 
  $1,250,000,000 FLOATING RATE CLASS A CREDIT CARD PARTICIPATION CERTIFICATES,
                                 SERIES 1998-7
   $80,000,000 FLOATING RATE CLASS B CREDIT CARD PARTICIPATION CERTIFICATES,
                                 SERIES 1998-7
 
                         CITIBANK (SOUTH DAKOTA), N.A.
                              SELLER AND SERVICER
 
                    CITIBANK (NEVADA), NATIONAL ASSOCIATION
                                     SELLER
 
                               ------------------
 
  The Floating Rate Class A Credit Card Participation Certificates, Series
1998-7 (the "Class A Certificates") and the Floating Rate Class B Credit Card
Participation Certificates, Series 1998-7 (the "Class B Certificates"; the
Class A Certificates and the Class B Certificates are collectively referred to
herein as the "Investor Certificates") offered hereby evidence undivided
interests in certain assets of Citibank Credit Card Master Trust I (the
"Trust") created by Citibank (South Dakota), N.A. ("Citibank (South Dakota)")
and Citibank (Nevada), National Association ("Citibank (Nevada)"), as sellers
(collectively, the "Banks"). The Trust assets include receivables (the
"Receivables") generated from time to time in a portfolio of revolving credit
card accounts and collections thereon. The fractional undivided interest in the
Trust represented by the Class B Certificates will be subordinated to the Class
A Certificates to the extent described herein. Following the completion of the
offering made hereby, additional Series 1998-7 Investor Certificates may be
issued from time to time if certain conditions have been met. See "Supplemental
Series Provisions--Issuance of Additional Investor Certificates" in this
Prospectus Supplement. The Trust previously has issued 39 other series of
investor certificates which evidence undivided interests in the Trust which are
still outstanding; additional series of investor certificates are expected to
be issued from time to time by the Trust.
(Continued on next page)
 
                               ------------------
 
 THE INVESTOR CERTIFICATES  REPRESENT BENEFICIAL  INTERESTS IN  THE TRUST ONLY
  AND DO NOT REPRESENT  INTERESTS IN OR OBLIGATIONS OF  THE BANKS OR CITICORP
   OR  ANY AFFILIATE  THEREOF.  NEITHER THE  INVESTOR  CERTIFICATES NOR  THE
    UNDERLYING ACCOUNTS  OR RECEIVABLES  ARE INSURED  OR GUARANTEED  BY THE
     UNITED STATES  GOVERNMENT, THE FEDERAL DEPOSIT  INSURANCE CORPORATION
      OR ANY OTHER GOVERNMENTAL AGENCY OR INSTRUMENTALITY.
 
 THESE SECURITIES HAVE NOT BEEN APPROVED  OR DISAPPROVED BY THE SECURITIES AND
  EXCHANGE  COMMISSION  OR  ANY  STATE  SECURITIES  COMMISSION  NOR  HAS  THE
   SECURITIES AND  EXCHANGE COMMISSION  OR  ANY STATE  SECURITIES COMMISSION
    PASSED UPON THE ACCURACY  OR ADEQUACY OF  THIS PROSPECTUS SUPPLEMENT OR
     THE PROSPECTUS.  ANY  REPRESENTATION TO  THE CONTRARY  IS  A CRIMINAL
      OFFENSE.
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                         Initial Public       Underwriting         Proceeds to
                                        Offering Price(1)       Discount         the Banks(1)(2)
- ------------------------------------------------------------------------------------------------
<S>                                    <C>                 <C>                 <C>
Per Class A Certificate..............       100.0000%            0.0875%            99.9125%
- ------------------------------------------------------------------------------------------------
Per Class B Certificate..............       100.0000%            0.1000%            99.9000%
- ------------------------------------------------------------------------------------------------
Total................................    $1,330,000,000        $1,173,750        $1,328,826,250
</TABLE>
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
(1) Plus accrued interest, if any, from May 14, 1998.
(2) Before deducting expenses payable by the Banks, estimated to be $725,000.
 
                               ------------------
 
  The Class A Certificates and the Class B Certificates are offered subject to
receipt and acceptance by the Class A Underwriters and the Class B Underwriter,
respectively, and to their right to reject any order in whole or in part and to
withdraw, cancel or modify the offer without notice. It is expected that
delivery of the Investor Certificates will be made in book-entry form through
the facilities of The Depository Trust Company ("DTC"), Cedel Bank, societe
anonyme ("Cedel") and the Euroclear System ("Euroclear") on or about May 14,
1998.
 
                               ------------------
 
                    UNDERWRITERS OF THE CLASS A CERTIFICATES
LEHMAN BROTHERS
                                 CITIBANK
                                                      CREDIT SUISSE FIRST BOSTON
                    UNDERWRITER OF THE CLASS B CERTIFICATES
                                LEHMAN BROTHERS
 
The date of this Prospectus Supplement is May 7, 1998
<PAGE>
 
(Continued from previous page)
 
  Interest with respect to the Investor Certificates will accrue from May 14,
1998 and will be payable monthly on or about the fifteenth day of each month,
commencing June 15, 1998, and on the related maturity date. The principal of
the Class A Certificates and the Class B Certificates is scheduled to be paid
on the May 2000 Distribution Date, but principal with respect to the Class A
Certificates and the Class B Certificates may be paid earlier or later under
certain limited circumstances described herein. Except under certain limited
circumstances described herein, principal payments will not be made to Class B
Certificateholders until the final principal payment has been made in respect
of the Class A Certificates. See "Summary of Series Terms--Class A
Certificates" and "--Class B Certificates" in this Prospectus Supplement.
 
  The Trust will have the benefit of funds on deposit in a Cash Collateral
Account. The Cash Collateral Account will be funded by an initial deposit of
$93,100,000, of which $66,500,000 will be for the benefit of both the Class A
Certificates and the Class B Certificates and $26,600,000 will be for the
exclusive benefit of the Class B Certificates. Amounts available to be
withdrawn from the Cash Collateral Account will be applied as described under
"Summary of Series Terms--Credit Enhancement" in this Prospectus Supplement
and "Series Provisions--Series Enhancements" in the Prospectus. Additional
credit enhancement will be provided in the event that additional Series 1998-7
Investor Certificates are issued. See "Supplemental Series Provisions--
Issuance of Additional Investor Certificates" in this Prospectus Supplement.
 
  Application will be made to list the Investor Certificates on the Luxembourg
Stock Exchange.
 
  POTENTIAL INVESTORS SHOULD CONSIDER, AMONG OTHER THINGS, THE DISCUSSION
UNDER "SPECIAL CONSIDERATIONS" THAT BEGINS ON PAGE 13 OF THE PROSPECTUS.
 
                              ------------------
 
  CERTAIN PERSONS PARTICIPATING IN THIS OFFERING MAY ENGAGE IN TRANSACTIONS
THAT STABILIZE, MAINTAIN OR OTHERWISE AFFECT THE PRICE OF THE INVESTOR
CERTIFICATES, INCLUDING OVER-ALLOTMENT, STABILIZING AND SHORT-COVERING
TRANSACTIONS IN SUCH INVESTOR CERTIFICATES, AND THE IMPOSITION OF A PENALTY
BID, IN CONNECTION WITH THE OFFERING. FOR A DESCRIPTION OF THESE ACTIVITIES,
SEE "UNDERWRITING" HEREIN.
 
                              ------------------
 
  This Prospectus Supplement does not contain complete information about the
offering of the Investor Certificates. Additional information is contained in
the Prospectus and purchasers are urged to read both this Prospectus
Supplement and the Prospectus in full. Sales of the Investor Certificates may
not be consummated unless the purchaser has received both this Prospectus
Supplement and the Prospectus.
 
  This Prospectus Supplement and the Prospectus may be used by Citicorp
Securities, Inc., Citibank International plc and Citibank, N.A., affiliates of
the Banks and wholly owned subsidiaries of Citicorp, in connection with offers
and sales related to market-making transactions in the Investor Certificates.
Citicorp Securities, Inc., Citibank International plc or Citibank, N.A. may
act as principal or agent in such transactions. Such sales will be made at
prices related to prevailing market prices at the time of sale.
 
                                      S-2
<PAGE>
 
 
                            SUMMARY OF SERIES TERMS
 
  This Summary of Series Terms (the "Summary of Terms") sets forth and defines
specific terms of the Investor Certificates offered by this Prospectus
Supplement and the Prospectus. The Summary of Terms is qualified in its
entirety by reference to the detailed information appearing elsewhere in this
Prospectus Supplement and in the Prospectus. Reference is made to the Glossary
Supplement at the end of this Prospectus Supplement and to the Glossary at the
end of the Prospectus for the location in this Prospectus Supplement and the
Prospectus of the definitions of certain capitalized terms used herein and
therein.
 
Title of Securities           $1,250,000,000 Floating Rate Class A Credit
Offered.....................   Card Participation Certificates, Series
                               1998-7.
                              $80,000,000 Floating Rate Class B Credit Card
                               Participation Certificates, Series 1998-7.
 
Class A Certificates
 Class A Certificate Rate...  For each Interest Period, a per annum rate
                               equal to the arithmetic mean of London
                               interbank offered quotations for U.S. dollar
                               deposits ("LIBOR") for a period of one month
                               plus 0.01%, calculated on the basis of the
                               actual number of days in the year divided by
                               a 360-day year. LIBOR will be determined as
                               of the applicable LIBOR Determination Date
                               as described herein. See "Supplemental
                               Series Provisions--Determination of LIBOR".
 
 Class A Interest Payment     The fifteenth day of each month (or, if such
Dates.......................   day is not a business day, the next
                               succeeding business day), commencing June
                               15, 1998.
 
 Class A Controlled
Amortization   Amount.......
                              $113,636,364 or, if the Servicer elects to
                               postpone the commencement of the
                               Accumulation Period, an amount sufficient so
                               that the aggregate of the Class A Controlled
                               Amortization Amounts for each Distribution
                               Date during the Accumulation Period equals
                               the Class A Invested Amount as of the Class
                               A Expected Final Payment Date. See
                               "Supplemental Series Provisions--
                               Postponement of Accumulation Period" in this
                               Prospectus Supplement.
 
 Class A Expected Final
Payment   Date..............
                              The May 2000 Distribution Date.
 
 Class A Investment Fee.....  $170,186.
 
 Class A Enhancement........  On each Distribution Date, the Available
                               Shared Enhancement Amount will be available
                               to fund certain amounts with respect to both
                               the Class A Certificates and the Class B
                               Certificates. See "Credit Enhancement" in
                               this Summary of Terms and "Series
                               Provisions--Series Enhancements" in the
                               Prospectus.
 
                              Collections of Principal Receivables and
                               related amounts (excluding collections of
                               Finance Charge Receivables) otherwise
                               allocable to the Class B Certificateholders
                               will be subordinated to the payment
 
                                      S-3
<PAGE>
 
                               of amounts due with respect to the Class A
                               Certificates and in order to maintain the
                               Class A Certificateholders' interest in the
                               Trust. No principal will be payable on the
                               Class B Certificates until the final
                               principal payment has been made on the Class
                               A Certificates, except that, on the first
                               Special Payment Date following an Economic
                               Early Amortization Event, a portion of the
                               Available Enhancement Amount will be used to
                               pay principal of the Class B Certificates.
                               See "Series Provisions--Allocations,
                               Reallocations and Subordination" in the
                               Prospectus.
 
 Initial Shared Enhancement
   Amount...................
                              $66,500,000.
 
 
 Class A ERISA                Benefit Plans are permitted to purchase Class
Eligibility.................   A Certificates. The Banks have received an
                               administrative exemption from the Department
                               of Labor providing that the acquisition of
                               Class A Certificates by a Benefit Plan is
                               exempt from certain of the prohibited
                               transaction provisions of ERISA if certain
                               conditions are satisfied. The Banks believe
                               that the conditions of such exemption
                               relating to the terms and conditions of the
                               Class A Certificates are satisfied. However,
                               the fiduciary of a Benefit Plan must
                               determine whether all the conditions of such
                               exemption are satisfied (including the
                               requirement that the Benefit Plan be an
                               "accredited investor" as defined in Rule
                               501(a)(1) of Regulation D under the
                               Securities Act), and whether an investment
                               by the Benefit Plan in Class A Certificates
                               is otherwise permissible. See "ERISA
                               Considerations" in the Prospectus.
 
 Class A Ratings............  It is a condition to the issuance of the
                               Class A Certificates that they be rated in
                               the highest rating category by at least one
                               nationally recognized rating agency. The
                               rating of the Class A Certificates is based
                               primarily on the value of the Receivables,
                               the extent of the Initial Shared Enhancement
                               Amount, the circumstances in which funds may
                               be withdrawn from the Cash Collateral
                               Account for the benefit of the Investor
                               Certificateholders and the terms of the
                               Class B Certificates. See "Special
                               Considerations--Series Considerations--
                               Ratings of the Investor Certificates" in the
                               Prospectus.
 
Class B Certificates
 Class B Certificate Rate...  For each Interest Period, a per annum rate
                               equal to LIBOR for a period of one month
                               plus 0.125%, calculated on the basis of the
                               actual number of days in the year divided by
                               a 360-day year. LIBOR will be determined as
                               of the applicable LIBOR Determination Date
                               as described herein. See "Supplemental
                               Series Provisions--Determination of LIBOR."
 
 Class B Interest Payment     The fifteenth day of each month (or, if such
Dates.......................   day is not a business day, the next
                               succeeding business day), commencing June
                               15, 1998.
 
 
                                      S-4
<PAGE>
 
 Class B Expected Final
Payment   Date..............
                              The May 2000 Distribution Date.
 
 Class B Enhancement........  On each Distribution Date, the Available
                               Shared Enhancement Amount (after giving
                               effect to the application thereof, if
                               necessary, to fund the Required Amount) will
                               be available to fund certain amounts with
                               respect to the Class B Certificates. The
                               Initial Class B Enhancement Amount will be
                               for the exclusive benefit of the Class B
                               Certificateholders. See "Credit Enhancement"
                               in this Summary of Terms and "Series
                               Provisions--Series Enhancements" in the
                               Prospectus.
 Initial Shared Enhancement
  Amount....................
                              $66,500,000.
 
 Initial Class B
Enhancement   Amount........
                              $26,600,000.
 
 Class B ERISA                Class B Certificates are not expected to be
Eligibility.................   eligible for purchase by Benefit Plans. See
                               "ERISA Considerations" in the Prospectus.
 
 Class B Ratings............  It is a condition to the issuance of the
                               Class B Certificates that they be rated at
                               least "A" or its equivalent by at least one
                               nationally recognized rating agency. The
                               rating of the Class B Certificates is based
                               primarily on the value of the Receivables,
                               the extent of the Initial Cash Collateral
                               Amount, the circumstances in which funds may
                               be withdrawn from the Cash Collateral
                               Account for the benefit of the Investor
                               Certificateholders and the credit ratings of
                               the Servicer and the Banks. See "Special
                               Considerations--Series Considerations--
                               Ratings of the Investor Certificates" in the
                               Prospectus.
 
Distribution Date...........  The fifteenth day of each month (or, if such
                               day is not a business day, the next
                               succeeding business day), commencing
                               June 15, 1998.
 
Credit Enhancement..........  A cash collateral account (the "Cash
                               Collateral Account") will be established in
                               the name of the Trustee, for the benefit of
                               the Investor Certificateholders. The Cash
                               Collateral Account will be funded on the
                               Series Issuance Date in the amount of
                               $93,100,000 (the "Initial Cash Collateral
                               Amount"). Of the Initial Cash Collateral
                               Amount, $66,500,000 (the "Initial Shared
                               Enhancement Amount") will be for the benefit
                               of both the Class A Certificates and the
                               Class B Certificates and the remaining
                               $26,600,000 of the Initial Cash Collateral
                               Amount (the "Initial Class B Enhancement
                               Amount") will be for the exclusive benefit
                               of the Class B Certificates. See "Series
                               Provisions--Series Enhancements" in the
                               Prospectus. Additional credit enhancement
                               will be provided in the event of an
                               Additional Issuance.
 
                              For each Distribution Date, the Available
                               Shared Enhancement Amount will be applied to
                               fund the following amounts in the
 
                                      S-5
<PAGE>
 
                               following priority: (a) with respect to the
                               Class A Certificates, the excess, if any, of
                               the Required Amount with respect to such
                               Distribution Date over the amount of Excess
                               Finance Charge Collections allocated and
                               available to fund such Required Amount and
                               (b) with respect to the Class B
                               Certificates, (i) the excess, if any, of the
                               accrued and unpaid interest on the
                               outstanding principal balance of the Class B
                               Certificates (plus any interest payable on
                               such unpaid interest) over the amount to be
                               deposited in the Class B Interest Funding
                               Account on such Distribution Date and (ii)
                               the excess, if any, of the Class B Investor
                               Default Amount for such Distribution Date
                               over the amount of Excess Finance Charge
                               Collections allocated and available to fund
                               such Class B Investor Default Amount.
 
                              On the first Special Payment Date following
                               an Economic Early Amortization Event, the
                               Available Shared Enhancement Amount (after
                               giving effect to other withdrawals from the
                               Cash Collateral Account on such Distribution
                               Date) will be applied to pay principal of
                               the Class A Certificates and the remainder
                               of the Available Cash Collateral Amount will
                               be applied to pay principal of the Class B
                               Certificates. Following such withdrawals
                               from the Cash Collateral Account on such
                               Special Payment Date, the Cash Collateral
                               Account will be terminated and no further
                               deposits to, or withdrawals from, the Cash
                               Collateral Account will be made for the
                               benefit of the Investor Certificateholders.
 
                              On each Distribution Date commencing with the
                               Class B Principal Commencement Date,
                               provided that an Economic Early Amortization
                               Event has not occurred, the Available Cash
                               Collateral Amount (after giving effect to
                               other withdrawals from the Cash Collateral
                               Account on such Distribution Date) will be
                               applied to pay principal of the Class B
                               Certificates to the extent that the unpaid
                               principal amount of the Class B Certificates
                               exceeds the Class B Invested Amount. See
                               "Series Provisions--Series Enhancements--
                               Credit Enhancement Generally" and "--The
                               Cash Collateral Account" in the Prospectus.
 
Issuance of Additional
 Investor Certificates......
                              After the completion of the offering made
                               hereby, the Banks may cause the Trustee to
                               issue additional Series 1998-7 Investor
                               Certificates ("Additional Investor
                               Certificates") from time to time during the
                               Revolving Period, provided that certain
                               conditions included in the Supplement
                               relating to the Series 1998-7 Certificates
                               (the "Series Supplement") are met. In
                               connection with each Additional Issuance,
                               the outstanding principal amounts of the
                               Class A Certificates and the Class B
                               Certificates and the aggregate amount of
                               Series Enhancement will all be increased pro
                               rata. When issued, the Additional Investor
                               Certificates of each class will be identical
                               in all respects to the other outstanding
                               Investor Certificates of that class. See
                               "Supplemental Series Provisions--Issuance of
                               Additional Investor Certificates" in this
                               Prospectus Supplement.
 
 
                                      S-6
<PAGE>
 
Previously Issued Series....  Thirty-nine Series of investor certificates
                               in Group One previously issued by the Trust
                               are still outstanding. See "Annex I: Prior
                               Issuances of Investor Certificates" in this
                               Prospectus Supplement for a summary of the
                               outstanding Series of investor certificates
                               previously issued by the Trust.
 
Participation with Other      The Investor Certificates are expected to be
Series......................   the 40th Series issued by the Trust,
                               outstanding as of the Series Issuance Date,
                               in a group of Series ("Group One") issued
                               from time to time by the Trust. Collections
                               of Finance Charge Receivables allocable to
                               each Series in Group One will be aggregated
                               and made available for required payments for
                               all Series in Group One. Consequently, the
                               issuance of a new Series in Group One may
                               have the effect of reducing or increasing
                               the amount of collections of Finance Charge
                               Receivables allocable to the Investor
                               Certificates. See "Series Provisions--
                               Allocations, Reallocations and
                               Subordination--Reallocations Among Investor
                               Certificates of Different Series" in the
                               Prospectus.
 
The Receivables.............  The aggregate amount of Receivables in the
                               Accounts included in the Trust as of March
                               28, 1998 was $33,226,283,328, of which
                               $32,701,936,386 were Principal Receivables
                               and $524,346,941 were Finance Charge
                               Receivables (which amounts include overdue
                               Principal Receivables and overdue Finance
                               Charge Receivables).
 
Series Cut-Off Date.........  April 27, 1998.
 
Series Issuance Date........  May 14, 1998.
 
Revolving Period and
Accumulation  Period........
                              Unless an Early Amortization Event has
                               occurred, the Revolving Period will end and
                               the Accumulation Period will commence at the
                               close of business on the fourth-to-last
                               business day of April 1999; provided,
                               however, the Servicer may, based on the
                               amount of principal available to the
                               investor certificates of all Series
                               determined based on the principal payment
                               rate on the Receivables and the amount of
                               principal distributable to investor
                               certificateholders of all outstanding Series
                               (excluding certain specified Series),
                               shorten the length of the Accumulation
                               Period and extend by an equivalent period
                               the length of the Revolving Period. See
                               "Supplemental Series Provisions--
                               Postponement of Accumulation Period" in this
                               Prospectus Supplement.
 
Servicing Compensation......  On each Distribution Date, Servicer
                               Interchange with respect to the related Due
                               Period that is on deposit in the Collection
                               Account will be withdrawn from the
                               Collection Account and paid to the Servicer.
                               In addition, the Class A Monthly Servicing
                               Fee, the Class B Monthly Servicing Fee and
                               the Seller Servicing Fee will be paid on
                               each Distribution Date as described under
                               "Series
 
                                      S-7
<PAGE>
 
                               Provisions--Allocations, Reallocations and
                               Subordination--Reallocations Among Investor
                               Certificates of Different Series--Group One
                               Investor Finance Charges" in the Prospectus.
                               See "Series Provisions--Servicing
                               Compensation and Payment of Expenses" in the
                               Prospectus.
 
Servicer Interchange Rate...  1.50% per annum.
 
Net Servicing Fee Rate......  0.37% per annum so long as Citibank (South
                               Dakota) or an affiliate of Citibank (South
                               Dakota) is the Servicer or 0.77% per annum
                               if Citibank (South Dakota) or an affiliate
                               of Citibank (South Dakota) is not the
                               Servicer.
 
Registration, Clearance and
 Settlement.................
                              The Investor Certificates initially will be
                               registered in the name of Cede, as the
                               nominee of DTC, and no purchaser of Investor
                               Certificates will be entitled to receive a
                               Definitive Certificate except under certain
                               limited circumstances. Certificateholders
                               may elect to hold their Investor
                               Certificates through DTC (in the United
                               States) or Cedel or Euroclear (in Europe).
                               Transfers will be made in accordance with
                               the rules and operating procedures described
                               herein.
 
Series Termination Date.....  The May 2002 Distribution Date.
 
                                      S-8
<PAGE>
 
              THE CREDIT CARD BUSINESS OF CITIBANK (SOUTH DAKOTA)
 
GENERAL
 
  Citibank (South Dakota) services the Accounts at its facilities located in
Sioux Falls, South Dakota, and through affiliated credit card processors
pursuant to service contracts. The Receivables conveyed to the Trust to date
were generated under the VISA or MasterCard International programs and were
either originated by Citibank (South Dakota) or purchased by Citibank (South
Dakota) from other credit card issuers. The Accounts are owned by Citibank
(South Dakota) but a participation in the Receivables in certain of these
Accounts has been or will be sold to Citibank (Nevada) prior to their
conveyance to the Trust.
 
  Subject to certain conditions, the Banks may convey to the Trust receivables
arising in credit card accounts of a type not currently included in the
Accounts. Affiliates of the Banks also currently conduct credit card
businesses. For example, Citicorp Retail Services, Inc. manages private label
credit card programs for several retailers. Receivables arising in such
accounts may be participated to the Banks and sold to the Trust. In addition,
the Banks may purchase portfolios of credit card accounts from other credit
card issuers which may be included in the Trust. Such accounts may not be
originated, used or collected in the same manner as the VISA and MasterCard
International accounts described below and may differ with respect to loss and
delinquency and revenue experience and historical payment rates. Such accounts
may also have different terms than the accounts described below, including
lower periodic finance charges. Consequently, the addition of the receivables
arising in such accounts to the Trust could have the effect of reducing the
Portfolio Yield.
 
  The following discussion describes certain terms and characteristics of the
Accounts. The Eligible Accounts from which the Accounts were selected
represent only a portion of the entire portfolio of consumer revolving credit
loans arising in the VISA and MasterCard accounts currently owned by Citibank
(South Dakota) (the "Portfolio"). In addition, Additional Accounts may consist
of Eligible Accounts which are not currently in existence and which are
selected using different eligibility criteria from those used in selecting the
Accounts already included in the Trust.
 
  Citibank (South Dakota) is a member of VISA and MasterCard International.
The VISA and MasterCard credit cards are issued as part of the worldwide VISA
and MasterCard International systems, and transactions creating the
receivables through the use of the credit cards are processed through the VISA
and MasterCard International authorization and settlement systems. Should
either system materially curtail its activities, or should Citibank (South
Dakota) cease to be a member of VISA or MasterCard International, for any
reason, an Early Amortization Event, as such term is defined in the related
Series Supplement, could occur, and delays in payments on the Receivables and
possible reductions in the amounts thereof could also occur. The VISA and
MasterCard accounts, the receivables in which have been conveyed to the Trust,
include both nonpremium and premium VISA and MasterCard accounts.
 
  The VISA and MasterCard credit cards of the type pursuant to which the
Accounts were established may be used to purchase merchandise and services and
to obtain cash advances. A cash advance is made when a credit card account is
used to obtain cash from a financial institution or automated teller machine,
which may be located at a financial institution, supermarket or other business
establishment. Amounts due with respect to both purchases and cash advances
will be included in the Receivables.
 
  The VISA and MasterCard credit card accounts owned by Citibank (South
Dakota) were principally generated through: (i) applications mailed directly
to prospective cardholders; (ii) applications made available to prospective
cardholders at the banking facilities of Citibank (South Dakota), at other
financial institutions and at retail outlets; (iii) applications generated by
advertising on television, on radio and in magazines; (iv) direct mail and
telemarketing solicitation for accounts on a pre-approved credit basis; (v)
solicitation of cardholders of existing nonpremium accounts for premium
accounts; (vi) applications through affinity and co-brand marketing programs;
and (vii) purchases of accounts from other credit card issuers.
 
                                      S-9
<PAGE>
 
ACQUISITION AND USE OF CREDIT CARDS
 
  When Citibank (South Dakota) generates new VISA and MasterCard accounts
through the solicitation of individual applications to open an account, it
reviews each application for completeness and creditworthiness. In addition,
Citibank (South Dakota) generally obtains a credit report issued by an
independent credit reporting agency with respect to the applicant. In the
event there are discrepancies between the application and the credit report
and in certain other circumstances, Citibank (South Dakota) may verify certain
of the information regarding the applicant. Citibank (South Dakota) generally
evaluates the ability of an applicant for a VISA or MasterCard credit card
account to repay credit card balances by applying a credit scoring system
using models developed in-house and models developed with the assistance of an
independent firm with extensive experience in developing credit scoring
models. Credit scoring is intended to provide a general indication, based on
the information available, of the applicant's willingness and ability to repay
his or her obligations. Credit scoring evaluates a potential cardholder's
credit profile to arrive at an estimate of the associated credit risk. Models
for credit scoring are developed by using statistics to evaluate common
characteristics and their correlation with credit risk. The credit scoring
model used to evaluate a particular applicant is based on a variety of
factors, including the manner in which the application was made or the manner
in which the account was acquired as well as the type of residence of the
applicant or cardholder. From time to time the credit scoring models used by
Citibank (South Dakota) are reviewed and, if necessary, updated to reflect
more current statistical information. Once an application to open an account
is approved an initial credit limit is established for the account based on,
among other things, the applicant's credit score and the source from which the
account was acquired.
 
  Citibank (South Dakota) also generates new VISA and MasterCard accounts
through direct mail and telemarketing solicitation campaigns directed at
individuals who have been pre-approved by Citibank (South Dakota). Citibank
(South Dakota) identifies potential cardholders for pre-approved direct mail
or telemarketing solicitation campaigns by supplying a list of credit criteria
to a credit bureau which generates a list of individuals who meet such
criteria and forwards such list to a processing vendor. The processing vendor
screens the list in accordance with the credit criteria of Citibank (South
Dakota) to determine the eligibility of the individuals on the list for a pre-
approved solicitation. Individuals qualifying for pre-approved direct mail or
telemarketing solicitation are offered a credit card without having to
complete a detailed application. In the case of pre-approved solicitations, a
predetermined credit limit is reserved for each member of the group being
solicited, which credit limit may be based upon, among other things, each
member's individual credit profile, level of existing and potential
indebtedness relative to assumed income and estimated income and the
availability of additional demographic data for such member.
 
  In recent years, Citibank (South Dakota) has added affinity and co-brand
marketing to its other means of business development. Affinity marketing
involves the solicitation of prospective cardholders from identifiable groups
with a common interest and/or common cause. Affinity marketing is conducted
through two approaches: the first relies on the solicitation of organized
membership groups with the written endorsement of the group's leadership and
the second utilizes direct mail solicitation of prospective cardholders
through the use of a list purchased from a group. Co-brand marketing is an
outgrowth of affinity marketing. It involves the solicitation of customers of
a retailer, service provider or manufacturer which has a recognizable brand
name or logo. Consumers are likely to acquire and use a co-branded card
because of the benefits provided by the co-brander. The co-brander may play a
major role in the marketing and solicitation of co-branded cards. Solicitation
activities used in connection with affinity and co-brand marketing also
include solicitations in appropriate magazines, telemarketing and applications
made available to prospective cardholders in appropriate locations. In certain
cases, pre-approved solicitations will be used in the same manner as described
in the preceding paragraph.
 
  Credit card accounts that have been purchased by Citibank (South Dakota)
were originally opened using criteria established by the institution from
which the accounts were purchased or by the institution from which the selling
institution originally purchased the accounts. Purchased accounts are screened
against criteria which are set at the time of acquisition to determine whether
any of the purchased accounts should be closed immediately. Any accounts
failing the criteria are closed and no further purchases or cash advances are
authorized. All other such accounts remain open. The credit limits on such
accounts are based initially on the
 
                                     S-10
<PAGE>
 
limits established or maintained by the selling institution. It is expected
that portfolios of credit card accounts purchased by the Banks from other
credit card issuers will be added to the Trust from time to time. It is
expected that such accounts will be screened in the manner described above.
 
  Each cardholder is subject to an agreement governing the terms and
conditions of the accounts. Pursuant to such agreement, Citibank (South
Dakota) reserves the right to change or terminate any terms, conditions,
services or features of the accounts (including increasing or decreasing
periodic finance charges, other charges or minimum payments). Credit limits
may be adjusted periodically based upon an evaluation of the cardholder's
performance.
 
COLLECTION OF DELINQUENT ACCOUNTS
 
  Generally, Citibank (South Dakota) considers a VISA or MasterCard account
delinquent if a minimum payment due thereunder is not received by Citibank
(South Dakota) by the due date indicated on the cardholder's statement.
Efforts to collect delinquent credit card receivables are made by the
personnel of Citibank (South Dakota) and affiliated credit card processors
pursuant to service contracts, supplemented by collection agencies and
attorneys retained by Citibank (South Dakota). Under current practice,
Citibank (South Dakota) includes a request for payment of overdue amounts on
all billing statements issued after the account becomes delinquent. While
collection personnel initiate telephone contact with cardholders whose credit
card accounts have become as little as five days delinquent, based on credit
scoring criteria, generally such contact is initiated when an account is 35
days or more delinquent. In the event that initial telephone contact fails to
resolve the delinquency, Citibank (South Dakota) continues to contact the
cardholder by telephone and by mail. Generally, 15 days after an account
becomes delinquent or whenever a cardholder exceeds such cardholder's credit
limit by more than 5% no additional extensions of credit through such account
are authorized, and no more than 95 days after an account becomes delinquent
it is closed. The Servicer may also, at its discretion, enter into
arrangements with delinquent cardholders to extend or otherwise change payment
schedules. The current policy of the Servicer is to charge-off the receivables
in an account when that account becomes 185 days delinquent or, if the
Servicer receives notice that a cardholder has filed for bankruptcy or has had
a bankruptcy petition filed against it, the Servicer will charge-off the
receivables in such account not later than 60 days after the Servicer receives
such notice. The credit evaluation, servicing and charge-off policies and
collection practices of Citibank (South Dakota) may change over time in
accordance with the business judgment of Citibank (South Dakota), applicable
law and guidelines established by applicable regulatory authorities.
 
                                     S-11
<PAGE>
 
                                 THE ACCOUNTS
 
GENERAL
 
  The Receivables arise in the Accounts. The Accounts have been selected from
substantially all of the Eligible Accounts in the Portfolio. Citibank (South
Dakota) believes that the Accounts are representative of the Eligible Accounts
in the Portfolio and that the inclusion of the Accounts, as a whole, does not
represent an adverse selection from among the Eligible Accounts.
 
  The Accounts include receivables which have been charged-off as
uncollectible prior to their addition to the Trust in accordance with normal
servicing policies. However, for purposes of calculation of the amount of
Principal Receivables and Finance Charge Receivables in the Trust for any
date, the balance of such charged-off receivables is zero and the Trust owns
only the right to receive recoveries with respect to such receivables.
 
  As of January 11, 1991 (the "Trust Cut-Off Date") and any Series Cut-Off
Date, as such term is defined in the prospectus supplement relating to such
Series (and on the date any new Receivables are generated), the Banks have
represented and warranted, and will represent and warrant, to the Trust that
the Receivables (and such new Receivables) meet the eligibility requirements
set forth in the Pooling Agreement. There can be no assurance that all of the
Accounts will continue to meet applicable eligibility requirements throughout
the life of the Trust.
 
  The Accounts consist of Eligible Accounts, which consist of VISA and
MasterCard credit card accounts. The Banks may (subject to certain limitations
and conditions), and, in certain circumstances, will be obligated to,
designate from time to time Additional Accounts and to convey to the Trust all
Receivables of such Additional Accounts, whether such Receivables are then
existing or thereafter created. The Banks have made Lump Sum Additions to the
Trust which, in the aggregate, included approximately $22.42 billion of
Principal Receivables. The Banks expect to make a Lump Sum Addition to the
Trust prior to the Series Issuance Date of approximately $6.0 billion of
Principal Receivables. The Lump Sum Additions consist primarily of receivables
arising from (a) certain premium and nonpremium VISA and MasterCard credit
card accounts which had been previously transferred by the Banks to credit
card trusts originated by the Banks which had reached their maturity dates and
terminated pursuant to their terms and (b) certain other premium and non-
premium VISA and MasterCard credit card accounts.
 
  Additional Accounts may be subject to different eligibility criteria from
those used in selecting the Initial Accounts and may not be accounts of the
same type previously included in the Trust. Therefore there can be no
assurance that such Additional Accounts will be of the same credit quality as
the Initial Accounts or the Additional Accounts, the Receivables in which have
been conveyed previously to the Trust. Moreover, Additional Accounts may
contain Receivables which consist of fees, charges and amounts which are
different from the fees, charges and amounts described below. Such Additional
Accounts may also be subject to different credit limits, balances and ages.
Consequently, there can be no assurance that the Accounts will continue to
have the characteristics described below as Additional Accounts are added. In
addition, the inclusion in the Trust of Additional Accounts with lower
periodic finance charges may have the effect of reducing the Portfolio Yield.
The Banks intend to file with the Securities and Exchange Commission, on
behalf of the Trust, a Current Report on Form 8-K with respect to any addition
of accounts which would have a material effect on the composition of the
Accounts.
 
LOSS AND DELINQUENCY EXPERIENCE
 
  The following tables set forth the loss and delinquency experience with
respect to payments by cardholders for each of the periods shown for the
Accounts. With respect to the Loss Experience table below, loss experience is
shown on a cash basis for Principal Receivables. If accrued Finance Charge
Receivables which have been written off were included in losses in the
following table, Net Losses would be higher as an absolute number and as a
percentage of the average of Principal and Finance Charge Receivables
outstanding during the periods indicated. There can be no assurance that the
loss and delinquency experience for the Receivables in the future will be
similar to the historical experience set forth below with respect to the
Accounts.
 
                                     S-12
<PAGE>
 
                      LOSS EXPERIENCE FOR THE ACCOUNTS(1)
                            (DOLLARS IN THOUSANDS)
 
<TABLE>
<CAPTION>
                           THREE MONTHS        YEAR ENDED DECEMBER 31,
                              ENDED      -------------------------------------
                          MARCH 31, 1998    1997         1996         1995
                          -------------- -----------  -----------  -----------
<S>                       <C>            <C>          <C>          <C>
Average Principal
 Receivables
 Outstanding(2)..........  $33,573,840   $33,529,923  $31,225,337  $25,083,447
Net Losses(3)............      527,356   $ 2,099,096  $ 1,678,991  $   956,261
Net Losses as a
 Percentage of Average
 Principal Receivables
 Outstanding(4)..........         6.37%         6.26%        5.38%        3.81%
</TABLE>
- --------
(1) Losses consist of write-offs of Principal Receivables.
(2) Average Principal Receivables Outstanding is the average of Principal
    Receivables outstanding during the periods indicated.
(3) Net losses as a percentage of gross charge-offs for the first three months
    of 1998 were 92.06% and for each of the years ended December 31, 1997,
    1996 and 1995 were 92.49%, 92.46% and 88.49%, respectively. Gross charge-
    offs are charge-offs before recoveries and do not include the amount of
    any reductions in Average Principal Receivables Outstanding due to fraud,
    returned goods, customer disputes or certain other miscellaneous write-
    offs.
(4) The percentage for the three months ended March 31, 1998 is an annualized
    number.
 
              DELINQUENCIES AS A PERCENTAGE OF THE ACCOUNTS(1)(2)
                            (DOLLARS IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                          AS OF DECEMBER 31,
                              AS OF           --------------------------------------------------------------------------
                          MARCH 31, 1998                1997                     1996                     1995
                     ------------------------ ------------------------ ------------------------ ------------------------
   NUMBER OF DAYS    DELINQUENT               DELINQUENT               DELINQUENT               DELINQUENT
     DELINQUENT      AMOUNT(1)  PERCENTAGE(2) AMOUNT(1)  PERCENTAGE(2) AMOUNT(1)  PERCENTAGE(2) AMOUNT(1)  PERCENTAGE(2)
   --------------    ---------- ------------- ---------- ------------- ---------- ------------- ---------- -------------
<S>                  <C>        <C>           <C>        <C>           <C>        <C>           <C>        <C>
35-64 days.......... $  593,779     1.74%     $  683,773     2.01%     $  714,532     2.25%     $  699,878     2.75%
65-94 days..........    364,664     1.07         389,897     1.15         394,432     1.25         353,832     1.39
95 days or more.....    682,921     2.00         699,696     2.06         687,988     2.17         558,613     2.20
                     ----------     ----      ----------     ----      ----------     ----      ----------     ----
 Total.............. $1,641,364     4.81%     $1,773,366     5.22%     $1,796,952     5.67%     $1,612,323     6.34%
                     ==========     ====      ==========     ====      ==========     ====      ==========     ====
</TABLE>
- --------
(1) The Delinquent Amount includes both the Principal Receivables and Finance
    Charge Receivables.
(2) The percentages are the result of dividing the Delinquent Amount by the
    average of Principal and Finance Charge Receivables outstanding during the
    periods indicated.
 
                                     S-13
<PAGE>
 
REVENUE EXPERIENCE
 
  The revenues for the Accounts from finance charges, fees paid by cardholders
and interchange for the three months ended March 31, 1998 and for each year of
the three-year period ended December 31, 1997 are set forth in the following
table.
 
  The revenue experience in the following table is presented on a cash basis
before deduction for charge-offs. Revenues from finance charges, fees and
interchange will be affected by numerous factors, including the periodic
finance charge on the Receivables, the amount of any annual membership fee,
other fees paid by cardholders, the percentage of cardholders who pay off
their balances in full each month and do not incur periodic finance charges on
purchases, the percentage of Accounts bearing finance charges at promotional
rates and changes in the level of delinquencies on the Receivables.
 
                      REVENUE EXPERIENCE FOR THE ACCOUNTS
                            (DOLLARS IN THOUSANDS)
 
<TABLE>
<CAPTION>
                             THREE MONTHS      YEAR ENDED DECEMBER 31,
                                ENDED      ----------------------------------
                            MARCH 31, 1998    1997        1996        1995
                            -------------- ----------  ----------  ----------
<S>                         <C>            <C>         <C>         <C>
Finance Charges and Fees
 Paid......................   $1,534,818   $6,189,383  $5,732,865  $4,545,420
Average Revenue
 Yield(1)(2)...............        18.54%       18.46%      18.36%      18.11%
</TABLE>
- --------
(1) Average Revenue Yield is the result of dividing Finance Charges and Fees
    Paid by Average Principal Receivables Outstanding during the periods
    indicated.
(2) The percentage for the three months ended March 31, 1998 is an annualized
    number.
 
  The revenues related to periodic finance charges and fees (other than annual
fees) depend in part upon the collective preference of cardholders to use
their credit cards as revolving debt instruments for purchases and cash
advances and to pay off account balances over several months as opposed to
convenience use (where the cardholders prefer instead to pay off their entire
balance each month, thereby avoiding periodic finance charges on purchases)
and upon other services of which the cardholder chooses to avail himself and
which are paid for by the use of the card. Fees for these other services will
be treated for purposes of the Pooling Agreement and the Series Supplement as
Principal Receivables rather than Finance Charge Receivables; however, the
Banks will be permitted to specify that any such fees will be treated as
Finance Charge Receivables. Revenues related to periodic finance charges and
fees also depend on the types of charges and fees assessed on the Accounts.
Accordingly, revenues will be affected by future changes in the types of
charges and fees assessed on the Accounts and in the types of Additional
Accounts added from time to time. Revenues could be adversely affected by
future changes in fees and charges assessed by Citibank (South Dakota) and
other factors.
 
  Citibank (South Dakota) has previously reduced the finance charges and
reduced or eliminated the annual fees applicable to, and modified some other
terms of, certain of the Accounts. These changes have reduced the gross yield
of the Accounts. See "The Accounts--Billing and Payments" in this Prospectus
Supplement.
 
CARDHOLDER MONTHLY PAYMENT RATES FOR THE ACCOUNTS
 
  Monthly payment rates on the Receivables may vary because, among other
things, cardholders may fail to make a required payment, may only make
payments as low as the minimum required payment or may make payments as high
as the entire outstanding balance. Monthly payment rates on the Receivables
may also vary due to seasonal purchasing and payment habits of cardholders.
The following table sets forth the highest and lowest cardholder monthly
payment rates for the Accounts during any month in the periods shown and the
average of the cardholder monthly payment rates for all months during the
periods shown, in each case calculated as a percentage of the total beginning
account balances for such month. Monthly payment rates reflected in the table
include amounts which would be deemed payments of Principal Receivables and
Finance Charge Receivables with respect to the Accounts. In addition, the
amount of outstanding Receivables and the rates of
 
                                     S-14
<PAGE>
 
payments, delinquencies, charge-offs and new borrowings on the Accounts depend
on a variety of factors including seasonal variations, the availability of
other sources of credit, general economic conditions, tax laws, consumer
spending and borrowing patterns and the terms of the Accounts (which are
subject to change by Citibank (South Dakota)).
 
               CARDHOLDER MONTHLY PAYMENT RATES FOR THE ACCOUNTS
 
<TABLE>
<CAPTION>
                           THREE MONTHS  YEAR ENDED DECEMBER 31,
                              ENDED      -------------------------
                          MARCH 31, 1998  1997     1996     1995
                          -------------- -------  -------  -------
<S>                       <C>            <C>      <C>      <C>
Lowest Month............      19.15%       18.00%   17.65%   17.59%
Highest Month...........      22.20%       21.98%   21.05%   20.92%
Average of the Months in
 the Period.............      20.55%       19.92%   19.39%   19.09%
</TABLE>
 
INTERCHANGE
 
  Creditors participating in the VISA and MasterCard International
associations receive Interchange as partial compensation for taking credit
risk, absorbing fraud losses and funding receivables for a limited period
prior to initial billing. Under the VISA and MasterCard International systems,
a portion of this Interchange in connection with cardholder charges for
merchandise and services is passed from banks which clear the transactions for
merchants to credit card-issuing banks. Interchange ranges from approximately
1% to 1.85% of the transaction amount. Citibank (South Dakota) is required,
pursuant to the terms of the Pooling Agreement, to transfer to the Trust
Interchange attributed to cardholder charges for merchandise and services in
the Accounts. Interchange is allocated to the Trust on the basis of the
percentage equivalent of the ratio which the amount of cardholder charges for
merchandise and services in the Accounts bears to the total amount of
cardholder charges for merchandise and services in the Portfolio. VISA and
MasterCard International may from time to time change the amount of
Interchange reimbursed to banks issuing their credit cards. On each
Distribution Date, Servicer Interchange with respect to the related Due Period
that is on deposit in the Collection Account will be withdrawn from the
Collection Account and paid to the Servicer as described under "Series
Provisions--Servicing Compensation and Payment of Expenses" in the Prospectus.
 
THE RECEIVABLES
 
  The Receivables in the Accounts as of March 28, 1998 included $524,346,941
of Finance Charge Receivables and $32,701,936,386 of Principal Receivables
(which amounts include overdue Finance Charge Receivables and overdue
Principal Receivables). As of March 28, 1998 there were 27,951,550 Accounts.
Included within the Accounts are inactive Accounts that have no balance. The
Accounts had an average Principal Receivable balance of $1,170 and an average
credit limit of $5,250. The average total Receivable balance in the Accounts
as a percentage of the average credit limit with respect to the Accounts was
23%. Approximately 94% of the Accounts were opened prior to March 1996.
Approximately 13.17%, 10.92%, 6.64% and 5.68% of the Accounts related to
cardholders having billing addresses in California, New York, Texas and
Florida, respectively. Not more than 5% of the Accounts related to cardholders
having billing addresses in any other single state.
 
                                     S-15
<PAGE>
 
  The following tables summarize the Accounts by various criteria as of March
28, 1998. References to "Receivables Outstanding" in the following tables
include both Finance Charge Receivables and Principal Receivables. Because the
composition of the Accounts will change in the future, these tables are not
necessarily indicative of the future composition of the Accounts.
 
                   COMPOSITION OF ACCOUNTS BY ACCOUNT BALANCE
 
<TABLE>
<CAPTION>
                                       PERCENTAGE                  PERCENTAGE
                                        OF TOTAL                    OF TOTAL
                            NUMBER OF  NUMBER OF    RECEIVABLES    RECEIVABLES
      ACCOUNT BALANCE        ACCOUNTS   ACCOUNTS    OUTSTANDING    OUTSTANDING
      ---------------       ---------- ---------- ---------------  -----------
<S>                         <C>        <C>        <C>              <C>
Credit Balance(1)..........    241,226     0.86%  $   (42,780,624)    (0.13)%
No Balance(2).............. 13,791,286    49.34                 0      0.00
Less than or equal to
 $500.00...................  3,446,929    12.33       666,418,604      2.01
$500.01 to $1,000.00.......  1,846,811     6.61     1,370,677,425      4.13
$1,000.01 to $2,000.00.....  2,869,113    10.26     4,230,000,605     12.73
$2,000.01 to $3,000.00.....  1,817,557     6.50     4,487,421,362     13.51
$3,000.01 to $4,000.00.....  1,171,502     4.19     4,064,096,258     12.23
$4,000.01 to $5,000.00.....    916,093     3.28     4,134,379,334     12.44
$5,000.01 to $6,000.00.....    593,714     2.12     3,246,505,831      9.77
$6,000.01 to $7,000.00.....    385,702     1.38     2,495,785,984      7.51
$7,000.01 to $8,000.00.....    271,600     0.97     2,030,390,909      6.11
$8,000.01 to $9,000.00.....    184,833     0.66     1,566,268,462      4.71
$9,000.01 to $10,000.00....    136,975     0.49     1,299,154,498      3.91
Over $10,000.00............    278,209     1.01     3,677,964,680     11.07
                            ----------   ------   ---------------    ------
  Total.................... 27,951,550   100.00%  $33,226,283,328    100.00%
                            ==========   ======   ===============    ======
</TABLE>
- --------
(1) Credit balances are a result of cardholder payments and credit adjustments
    applied in excess of an Account's unpaid balance. Accounts which currently
    have a credit balance are included because Receivables may be generated
    with respect thereto in the future.
(2) Accounts which currently have no balance are included because Receivables
    may be generated with respect thereto in the future.
 
                    COMPOSITION OF ACCOUNTS BY CREDIT LIMIT
 
<TABLE>
<CAPTION>
                                        PERCENTAGE                 PERCENTAGE
                                         OF TOTAL                   OF TOTAL
                             NUMBER OF  NUMBER OF    RECEIVABLES   RECEIVABLES
        CREDIT LIMIT          ACCOUNTS   ACCOUNTS    OUTSTANDING   OUTSTANDING
        ------------         ---------- ---------- --------------- -----------
<S>                          <C>        <C>        <C>             <C>
Less than or equal to
 $500.00....................  1,717,334     6.14%  $    62,676,711     0.19%
$500.01 to $1,000.00........  1,640,408     5.87       394,611,835     1.19
$1,000.01 to $2,000.00......  4,268,740    15.27     2,327,832,189     7.01
$2,000.01 to $3,000.00......  3,337,662    11.94     2,636,062,688     7.93
$3,000.01 to $4,000.00......  2,362,330     8.45     2,373,098,459     7.14
$4,000.01 to $5,000.00......  3,136,788    11.22     3,665,439,803    11.03
Over $5,000.00.............. 11,488,288    41.11    21,766,561,643    65.51
                             ----------   ------   ---------------   ------
  Total..................... 27,951,550   100.00%  $33,226,283,328   100.00%
                             ==========   ======   ===============   ======
</TABLE>
 
                                      S-16
<PAGE>
 
                   COMPOSITION OF ACCOUNTS BY PAYMENT STATUS
 
<TABLE>
<CAPTION>
                                         PERCENTAGE                 PERCENTAGE
                                          OF TOTAL                   OF TOTAL
                              NUMBER OF  NUMBER OF    RECEIVABLES   RECEIVABLES
       PAYMENT STATUS          ACCOUNTS   ACCOUNTS    OUTSTANDING   OUTSTANDING
       --------------         ---------- ---------- --------------- -----------
<S>                           <C>        <C>        <C>             <C>
Current(1)................... 26,624,919    95.25%  $29,565,523,487    88.98%
Up to 34 days delinquent.....    767,015     2.74     2,019,395,386     6.08
35 to 64 days delinquent.....    231,943     0.83       593,779,181     1.79
65 to 94 days delinquent.....    119,215     0.43       364,663,904     1.10
95 to 124 days delinquent....     85,273     0.31       269,757,197     0.81
125 to 154 days delinquent...     68,769     0.25       226,148,740     0.68
155 to 184 days delinquent...     54,416     0.19       187,015,433     0.56
                              ----------   ------   ---------------   ------
  Total...................... 27,951,550   100.00%  $33,226,283,328   100.00%
                              ==========   ======   ===============   ======
</TABLE>
- --------
(1) Includes Accounts on which the minimum payment has not been received prior
    to the next billing date following the issuance of the related bill.
 
                        COMPOSITION OF ACCOUNTS BY AGE
 
<TABLE>
<CAPTION>
                                         PERCENTAGE                 PERCENTAGE
                                          OF TOTAL                   OF TOTAL
                              NUMBER OF  NUMBER OF    RECEIVABLES   RECEIVABLES
            AGE                ACCOUNTS   ACCOUNTS    OUTSTANDING   OUTSTANDING
            ---               ---------- ---------- --------------- -----------
<S>                           <C>        <C>        <C>             <C>
Less than or equal to 6
 months.....................           0     0.00%  $             0     0.00%
Over 6 months to 12 months..           0     0.00                 0     0.00
Over 12 months to 24
 months.....................   1,570,290     5.62     1,762,314,152     5.30
Over 24 months to 36
 months.....................   3,811,103    13.63     4,505,533,786    13.56
Over 36 months to 48
 months.....................   4,460,252    15.96     4,593,163,971    13.82
Over 48 months..............  18,109,905    64.79    22,365,271,419    67.32
                              ----------   ------   ---------------   ------
  Total.....................  27,951,550   100.00%  $33,226,283,328   100.00%
                              ==========   ======   ===============   ======
</TABLE>
 
 
BILLING AND PAYMENTS
 
  The Accounts have various billing and payment structures, including varying
periodic finance charges and fees. The following is information on the current
billing and payment characteristics of the Accounts.
 
  Monthly billing statements are sent by Citibank (South Dakota) to
cardholders with balances at the end of the billing period. Each month a VISA
or MasterCard cardholder must make a minimum payment equal to (a) with respect
to nonpremium accounts, the sum of (i) the greater of $20 (or, if the then
current balance is less than $20, such balance) and 1/48 of the then current
balance, (ii) any amount which is past due and (iii) any amount which is in
excess of the credit limit; or (b) with respect to premium accounts, the sum
of (i) the greater of $50 (or, if the then current balance is less than $50,
such balance) and 1/48 of the then current balance, (ii) any amount which is
past due and (iii) any amount which is in excess of the credit limit;
provided, that in each case the required minimum payment will not be less than
the finance charges billed. Prior to December 1993, the minimum payments were
determined by reference to 1/36 of the then current balance, rather than 1/48.
 
  A periodic finance charge is assessed on the Accounts. The periodic finance
charge assessed on balances for cash advances is calculated by multiplying (i)
the average daily balances for cash advances during the billing cycle by (ii)
the number of days in the billing cycle by (iii) the applicable daily periodic
finance charge. Cash advances are included in the average daily balance for
cash advances from the date such advances are made. The periodic finance
charge assessed on balances for purchases is calculated by multiplying the
average daily balance
 
                                     S-17
<PAGE>
 
for purchases (the balance thereof on which finance charges are assessed) by
the applicable monthly periodic finance charge. Purchases are included in the
average daily balance for purchases generally from the date of purchase.
Periodic finance charges are not assessed in most circumstances on purchase
amounts if all balances shown in the previous billing statement are paid in
full by the due date indicated on such statement. The periodic finance charge
assessed on balances in most accounts for cash advances and purchases is
currently the Prime Rate (as published in The Wall Street Journal ) plus a
percentage ranging from 5.4% to 10.4% for accounts in good standing, and the
Prime Rate plus 12.9% for accounts which have been recently, or currently are,
delinquent. As of the most recent quarterly reset date, the periodic finance
charge ranged from 13.90% to 18.90% for most accounts in good standing, and
was 21.40% for most accounts which have been recently, or currently are,
delinquent. Citibank (South Dakota) may change the periodic finance charge on
accounts at any time by written notice to the cardholders. Any announced
increase in such rate will become effective upon the earlier of subsequent use
of a card and the expiration of a 25-day period from the date such change was
made effective (assuming failure on the part of the cardholder to object to
the new rate). Citibank (South Dakota) also offers promotional rates of
limited duration to attract new cardholders and to promote balance transfers
from other credit card issuers and, under certain circumstances, the periodic
finance charge on a limited number of accounts may be greater or less than
those assessed by Citibank (South Dakota) generally.
 
  Prior to December 1993, Citibank (South Dakota) generally assessed an annual
membership fee of between $20 and $100 per account. Effective December 1,
1993, Citibank (South Dakota) eliminated the annual membership fee for certain
premium and nonpremium cardholders who met specified non-delinquency criteria.
This change did not apply to affinity or co-branded card products. In
addition, effective January 1, 1995, Citibank (South Dakota) eliminated the
annual fees applicable to certain other accounts, including certain of its
affinity and co-branded card products. These changes have reduced the gross
yield of the Accounts. Citibank (South Dakota) management believes that the
elimination of annual fees is within industry norms and is an important
component of management's initiative to maintain Citibank (South Dakota)'s
leadership position in the market for bank credit cards. Certain of the
Accounts may be subject to certain additional fees, including: (a) a late fee
of $25 if Citibank (South Dakota) does not receive a required minimum payment
by the payment due date shown on the monthly billing statement, which fee is
assessed monthly until the account is less than 30 days past due; (b) a cash
advance fee which is generally equal to 2.5% of the amount of the cash advance
(subject to a minimum fee of $2 with no maximum); (c) a returned payment fee
of $25; (d) a returned check fee of $25; (e) a stop payment fee of $25 and (f)
a fee of $25 for each billing period with respect to each account with an
outstanding balance over the credit limit established for such account.
 
  Payments by cardholders to Citibank (South Dakota) on the Accounts are
processed and applied to all minimum amounts due, from the oldest to the most
current, with respect to the following items in the following order: (i)
periodic finance charges on cash advances; (ii) periodic finance charges on
purchases; (iii) cash advance amounts and (iv) purchase amounts. When all
minimum amounts due are paid, payments are generally allocated first to cash
advance balances and then to purchase balances. There can be no assurance that
periodic finance charges, fees and other charges will remain at current levels
in the future.
 
                                     S-18
<PAGE>
 
                                   THE BANKS
 
  Citibank (South Dakota), a national banking association and an indirect
wholly owned subsidiary of Citicorp located in Sioux Falls, South Dakota, was
formed in 1981 and conducts nationwide consumer lending programs primarily
comprised of credit card-related activities. Citibank (South Dakota) is the
nation's largest bank credit card issuer. The principal executive office of
Citibank (South Dakota) is located at 701 East 60th Street, North, Sioux
Falls, South Dakota 57117 (telephone (605) 331-2626).
 
  Citibank (Nevada), a national banking association and an indirect wholly
owned subsidiary of Citicorp located in Las Vegas, Nevada, was formed in 1985
and conducts a retail banking business in the Las Vegas, Nevada area and
services credit card accounts for certain of its affiliates. The principal
executive office of Citibank (Nevada) is located at 8725 West Sahara Avenue,
Las Vegas, Nevada 89163 (telephone (702) 797-4444).
 
                        SUPPLEMENTAL SERIES PROVISIONS
 
CERTAIN DEFINITIONS
 
  "Class A Monthly Interest" means, with respect to any Distribution Date, the
product of (a) the Class A Certificate Rate in effect with respect to the
relevant Interest Period, (b) the outstanding principal amount of the Class A
Certificates as of the close of business on the preceding Distribution Date
(after subtracting therefrom the aggregate amount of all distributions of
Class A Monthly Principal previously made either to the Class A Principal
Funding Account or to the Class A Certificateholders) and (c) a fraction, the
numerator of which is the actual number of days from and including the prior
Distribution Date to but excluding such Distribution Date and the denominator
of which is 360 or, with respect to the first Distribution Date, interest on
the initial Class A Invested Amount at the Class A Certificate Rate from and
including the Series Issuance Date to but excluding such Distribution Date
(calculated on the basis of a 360-day year of twelve 30-day months), provided
that such amount will be adjusted to reflect any Additional Issuance during
the related Due Period.
 
  "Class B Monthly Interest" means, with respect to any Distribution Date, the
product of (a) the Class B Certificate Rate in effect with respect to the
relevant Interest Period, (b) the Class B Invested Amount as of the close of
business on the preceding Distribution Date (after giving effect to any
increase or decrease in the Class B Invested Amount on such preceding
Distribution Date) and (c) a fraction, the numerator of which is the actual
number of days from and including the prior Distribution Date to but excluding
such Distribution Date and the denominator of which is 360 or, with respect to
the first Distribution Date, interest on the initial Class B Invested Amount
at the Class B Certificate Rate from and including the Series Issuance Date to
but excluding such Distribution Date (calculated on the basis of a 360-day
year of twelve 30-day months), provided that such amount will be adjusted to
reflect any Additional Issuance during the related Due Period.
 
DETERMINATION OF LIBOR
 
  The Servicer will determine LIBOR for each applicable Interest Period on the
second business day prior to the applicable Payment Date (or, in the case of
the initial Interest Period, the second business day prior to the Series
Issuance Date) on which such Interest Period commences (each a "LIBOR
Determination Date"). For purposes of calculating LIBOR, a business day is any
day on which dealings in deposits in U.S. Dollars are transacted in the London
interbank market.
 
  "LIBOR" means, as of any LIBOR Determination Date, the rate for deposits in
U.S. Dollars for a period of one month (commencing on the first day of the
relevant Interest Period) which appears on the Telerate Page 3750 as of 11:00
a.m., London time, on such date. If such rate does not appear on Telerate Page
3750, the rate for that day will be determined on the basis of the rates at
which deposits in U.S. Dollars are offered by the Reference Banks at
approximately 11:00 a.m., London time, on that day to prime banks in the
London interbank market for a period of one month (commencing on the first day
of the relevant Interest Period). The Servicer will request the principal
London office of each of the Reference Banks to provide a quotation of its
rate. If at least two such quotations are provided, the rate for that day will
be the arithmetic mean of the quotations. If fewer than two quotations are
provided as requested, the rate for that day will be the arithmetic mean of
the rates
 
                                     S-19
<PAGE>
 
quoted by major banks in New York City, selected by the Servicer, at
approximately 11:00 a.m., New York City time, on that day for loans in U.S.
Dollars to leading European banks for a period of one month (commencing on the
first day of the relevant Interest Period).
 
  "Telerate Page 3750" means the display page currently so designated on the
Dow Jones Telerate Service (or such other page as may replace that page on
that service for the purpose of displaying comparable rates or prices).
 
  "Reference Banks" means four major banks in the London interbank market
selected by the Servicer.
 
ISSUANCE OF ADDITIONAL INVESTOR CERTIFICATES
 
  The Series Supplement provides that, from time to time during the Revolving
Period, the Banks may, subject to certain conditions described below, cause
the Trustee to issue Additional Investor Certificates (each such issuance, an
"Additional Issuance"). When issued, the Additional Investor Certificates of
each class will be identical in all respects to the other outstanding Investor
Certificates of that class and will be equally and ratably entitled to the
benefits of the Pooling Agreement and the Series Supplement without
preference, priority or distinction.
 
  In connection with each Additional Issuance, the outstanding principal
amounts of the Class A Certificates and the Class B Certificates and the
aggregate amount of Series Enhancement will all be increased pro rata. The
additional Series Enhancement provided in connection with an Additional
Issuance may take the form of an additional deposit to the Cash Collateral
Account, the purchase of interest rate caps or swaps and/or another form of
Series Enhancement, provided that the form and amount of additional Series
Enhancement will not cause a Ratings Effect.
 
  Following an Additional Issuance, the respective portions of the Series
Enhancement that are for the benefit of the Class A Certificateholders and the
Class B Certificateholders will remain the same, as a percentage of the total
Series Enhancement, as the respective proportions in effect on the Series
Issuance Date. The Class A Controlled Amortization Amount will be increased
proportionately to reflect the principal amount of additional Class A
Certificates, and the Class A Investment Fee will also be increased, provided
that, subject to certain exceptions, the ratio of the maximum possible Class A
Investment Fee to the Invested Amount after giving effect to the Additional
Issuance shall not be more than 150% of that ratio as in effect on the Series
Issuance Date.
 
  Additional Investor Certificates may be issued only upon the satisfaction of
certain conditions provided in the Series Supplement, including the following:
(a) on or before the fifth Business Day immediately preceding the date on
which the Additional Investor Certificates are to be issued, the Banks shall
have given the Trustee, the Servicer and any provider of Series Enhancement
written notice of such issuance and the date upon which it is to occur; (b)
after giving effect to the Additional Issuance, the total amount of Principal
Receivables shall be at least equal to the Required Minimum Principal Balance;
(c) the Banks shall have delivered to the Trustee any additional Series
Enhancement agreement related to the Additional Issuance, executed by each of
the parties to such agreement; (d) the Trustee shall have received
confirmation from the Rating Agency that such Additional Issuance will not
result in a Ratings Effect; (e) the Banks shall have delivered to the Trustee
a certificate of an authorized officer, dated the date upon which the
Additional Issuance is to occur, to the effect that the Banks reasonably
believe that such issuance will not at the time of its occurrence or at a
future date cause an Adverse Effect; (f) as of the date of the Additional
Issuance and taking the Additional Issuance into account, the amount on
deposit in the Cash Collateral Account, together with any additional Series
Enhancement, shall not be less than the amount required so that the Additional
Issuance will not result in a Ratings Effect; (g) as of the date of the
Additional Issuance, all amounts due and owing to the holders of Investor
Certificates shall have been paid, and there shall not be any unreimbursed
Class A or Class B Investor Charge-Offs; (h) the excess of the principal
amount of the Additional Investor Certificates over their issue price shall
not exceed the maximum amount permitted under the Code without the creation of
original issue discount; (i) the Banks' remaining interest in Principal
Receivables shall not be less than 2% of the total amount of Principal
Receivables, in each case as of
 
                                     S-20
<PAGE>
 
the date upon which the Additional Issuance is to occur after giving effect to
such issuance; (j) as of the date of the Additional Issuance and taking the
Additional Issuance into account, the Notional Amount must equal the sum of
the initial principal amount of the Class A Certificates and the principal
amount of any Class A Certificates issued pursuant to such Additional
Issuance; and (k) the Banks shall have delivered to the Trustee an opinion of
counsel acceptable to the Trustee that for federal and South Dakota income and
franchise tax purposes (i) following the Additional Issuance the Trust will
not be an association (or publicly traded partnership) taxable as a
corporation, (ii) the Additional Investor Certificates will be properly
characterized as debt and (iii) the Additional Issuance will not adversely
affect the characterization of the outstanding Investor Certificates or the
investor certificates of any other Series as debt and will not cause a taxable
event to holders of any such investor certificates.
 
  There are no restrictions on the timing or amount of any Additional
Issuance, provided that the conditions described above are met. As of the date
of any Additional Issuance, the Class A Invested Amount and the Class B
Invested Amount will be increased to reflect the initial principal balance of
the Additional Investor Certificates of the respective classes.
 
POSTPONEMENT OF ACCUMULATION PERIOD
 
  Upon written notice to the Trustee, the Sellers, the Rating Agency and the
Cash Collateral Depositor, the Servicer may elect to shorten the length of the
Accumulation Period, and extend by an equivalent period the length of the
Revolving Period, subject to certain conditions including those set forth
below. The Servicer may make such election only if the Accumulation Period
Length (determined as described below) is less than twelve months. On the
Determination Date immediately preceding the April 1999 Distribution Date and
thereafter on each Determination Date until the date the Accumulation Period
begins, the Servicer will determine the "Accumulation Period Length" based on
the amount of principal available to the investor certificates of all Series
determined based on the lowest monthly principal payment rate on the
Receivables for the prior 12 months and the amount of principal distributable
to the Certificateholders of all outstanding Series (excluding certain
specified Series) which are not in their revolving period. If the Accumulation
Period Length is less than twelve months, the Servicer may, at its option,
postpone the commencement of the Accumulation Period such that the number of
months included in the Accumulation Period will be equal to or exceed the
Accumulation Period Length. The effect of the foregoing calculation is to
permit the reduction of the length of the Accumulation Period based on the
invested amounts of certain other Series which are scheduled to be in their
revolving periods during the Accumulation Period and on increases in the
principal payment rate, which, if continued, would result in a shorter
Accumulation Period. The length of the Accumulation Period will not be less
than one month and will not be shorter than the period determined as of the
first date of determination unless the Trust has issued another Series of
investor certificates subsequent to that date and such Series is in its
revolving period. If the Accumulation Period is postponed in accordance with
the foregoing, and if an Early Amortization Event occurs after the date
originally scheduled as the commencement of the Accumulation Period, it is
probable that holders of Investor Certificates would receive some of their
principal later than if the Accumulation Period had not been so postponed.
 
                                     S-21
<PAGE>
 
                                 UNDERWRITING
 
  Subject to the terms and conditions set forth in the underwriting agreement
relating to the Class A Certificates (the "Class A Underwriting Agreement"),
the Banks have agreed to cause the Trust to sell to each of the underwriters
named below (the "Class A Underwriters"), and each of the Class A Underwriters
has severally agreed to purchase, the principal amount of Class A Certificates
set forth opposite its name:
                             CLASS A CERTIFICATES
<TABLE>
<CAPTION>
                                                                   PRINCIPAL
        CLASS A UNDERWRITERS                                         AMOUNT
        --------------------                                     --------------
   <S>                                                           <C>
   Lehman Brothers Inc. ........................................ $  450,000,000
   Citibank, N.A................................................    400,000,000
   Credit Suisse First Boston Corporation.......................    400,000,000
                                                                 --------------
        Total................................................... $1,250,000,000
                                                                 ==============
</TABLE>
 
  In the Class A Underwriting Agreement, the several Class A Underwriters have
agreed, subject to the terms and conditions set forth therein, to purchase all
$1,250,000,000 aggregate principal amount of the Class A Certificates offered
hereby if any Class A Certificates are purchased. In the event of default by
any Class A Underwriter, the Class A Underwriting Agreement provides that, in
certain circumstances, purchase commitments of the nondefaulting Class A
Underwriters may be increased or the Class A Underwriting Agreement may be
terminated. The Banks have been advised by the Class A Underwriters that the
several Class A Underwriters propose initially to offer the Class A
Certificates to the public at the public offering price set forth on the cover
page of this Prospectus Supplement, and to certain dealers at such price less
a concession not in excess of 0.0825% of the principal amount of the Class A
Certificates. The Class A Underwriters may allow and such dealers may reallow
to other dealers a concession not in excess of 0.0500% of such principal
amount. After the initial public offering, the public offering price and such
concessions may be changed.
 
  Subject to the terms and conditions set forth in the underwriting agreement
relating to the Class B Certificates (the "Class B Underwriting Agreement";
the Class A Underwriting Agreement and the Class B Underwriting Agreement are
collectively referred to herein as the "Underwriting Agreements"), the Banks
have agreed to cause the Trust to sell to Lehman Brothers Inc. (the "Class B
Underwriter"; the Class A Underwriters and the Class B Underwriter are
collectively referred to herein as the "Underwriters"), and the Class B
Underwriter has agreed to purchase, all $80,000,000 aggregate principal amount
of the Class B Certificates offered hereby if any Class B Certificates are
purchased.
 
  The Banks have been advised by the Class B Underwriter that the Class B
Underwriter proposes initially to offer the Class B Certificates to the public
at the public offering price set forth on the cover page of this Prospectus
Supplement, and to certain dealers at such price less a concession not in
excess of 0.0950% of the principal amount of the Class B Certificates. The
Class B Underwriter may allow and such dealers may reallow to other dealers a
concession not in excess of 0.0500% of such principal amount. After the
initial public offering, the public offering price and such concessions may be
changed.
 
  Each Underwriter will represent and agree that:
 
    (a) it has complied and will comply with all applicable provisions of the
  Financial Services Act 1986 with respect to anything done by it in relation
  to the Investor Certificates in, from or otherwise involving the United
  Kingdom;
 
    (b) it has only issued, distributed or passed on and will only issue,
  distribute or pass on in the United Kingdom any document received by it in
  connection with the issue of the Investor Certificates to a person who is
  of a kind described in Article 11(3) of the Financial Services Act 1986
  (Investment Advertisements) (Exemptions) Order 1996 or is a person to whom
  such document may otherwise lawfully be issued, distributed or passed on;
 
    (c) if it is an authorized person under Chapter III of Part I of the
  Financial Services Act 1986, it has only promoted and will only promote (as
  that term is defined in Regulation 1.02(2) of the Financial Services
 
                                     S-22
<PAGE>
 
  (Promotion of Unregulated Schemes) Regulations 1991) to any person in the
  United Kingdom the scheme described in this Prospectus Supplement and the
  Prospectus if that person is a kind described either in section 76(2) of
  the Financial Services Act 1986 or in Regulation 1.04 of the Financial
  Services (Promotion of Unregulated Schemes) Regulations 1991; and
 
    (d) it is a person of a kind described in Article 11(3) of the Financial
  Services Act 1986 (Investment Advertisements) (Exemptions) Order 1996.
 
  The Underwriters may engage in over-allotment, stabilizing transactions,
syndicate covering transactions and penalty bids in accordance with Regulation
M under the Securities Exchange Act of 1934, as amended. Over-allotment
involves sales in excess of the offering size, which creates a short position
for the Underwriters. Stabilizing transactions permit bids to purchase the
underlying security so long as the stabilizing bids do not exceed a specified
maximum. Covering transactions involve purchases of the Investor Certificates
in the open market after the distribution has been completed in order to cover
short positions. Penalty bids permit the Underwriters to reclaim a selling
concession from a dealer when the Investor Certificates originally sold by
such dealer are purchased in a covering transaction to cover short positions.
Such stabilizing transactions, covering transactions and penalty bids may
cause the price of the securities to be higher than it would otherwise be in
the absence of such transactions.
 
  Neither the Banks nor the Underwriters make any representation or prediction
as to the direction or magnitude of any effect that the transactions described
above may have on the price of the Investor Certificates. In addition, neither
the Banks nor the Underwriters make any representations that the Underwriters
will engage in such transactions or that such transactions, once commenced,
will not be discontinued without notice.
 
  The Underwriting Agreements provide that the Banks will indemnify the
Underwriters against certain liabilities, including liabilities under
applicable securities laws, or contribute to payments the Underwriters may be
required to make in respect thereof.
 
  The closing of the sale of each class of Investor Certificates is
conditioned upon the closing of the sale of the other class.
 
  Citibank, N.A. is an affiliate of the Banks.
 
                                 LEGAL MATTERS
 
  Certain legal matters relating to the Investor Certificates will be passed
upon for the Banks and the Trust by Stephen E. Dietz, an Associate General
Counsel of Citibank, N.A., and for the Underwriters by Cravath, Swaine &
Moore, New York, New York. Mr. Dietz owns or has the right to acquire a number
of shares of common stock of Citicorp equal to less than .01% of the
outstanding common stock of Citicorp. Certain federal income tax and ERISA
matters will be passed upon for the Banks and the Trust by Cravath, Swaine &
Moore, New York, New York and certain South Dakota tax matters will be passed
upon for the Banks and the Trust by Davenport, Evans, Hurwitz & Smith, L.L.P.,
Sioux Falls, South Dakota.
 
                                     S-23
<PAGE>
 
                              GLOSSARY SUPPLEMENT
 
<TABLE>
<S>                                                                         <C>
Accumulation Period........................................................  S-7
Accumulation Period Length................................................. S-21
Additional Investor Certificates...........................................  S-6
Additional Issuance........................................................ S-20
Banks......................................................................  S-1
Cash Collateral Account....................................................  S-5
Citibank (Nevada)..........................................................  S-1
Citibank (South Dakota)....................................................  S-1
Cedel......................................................................  S-1
Class A Certificate Rate...................................................  S-3
Class A Certificates.......................................................  S-1
Class A Controlled Amortization Amount.....................................  S-3
Class A Enhancement........................................................  S-3
Class A Expected Final Payment Date........................................  S-3
Class A Interest Payment Dates.............................................  S-3
Class A Investment Fee.....................................................  S-3
Class A Monthly Interest................................................... S-19
Class A Underwriters....................................................... S-22
Class A Underwriting Agreement............................................. S-22
Class B Certificate Rate...................................................  S-4
Class B Certificates.......................................................  S-1
Class B Enhancement........................................................  S-5
Class B Expected Final Payment Date........................................  S-5
Class B Interest Payment Dates.............................................  S-4
Class B Monthly Interest................................................... S-19
Class B Underwriters....................................................... S-22
Class B Underwriting Agreement............................................. S-22
Distribution Date..........................................................  S-5
DTC........................................................................  S-1
Euroclear..................................................................  S-1
Group One..................................................................  S-7
Initial Cash Collateral Amount.............................................  S-5
Initial Class B Enhancement Amount.........................................  S-5
Initial Shared Enhancement Amount..........................................  S-4
Investor Certificates......................................................  S-1
LIBOR......................................................................  S-3
LIBOR Determination Date................................................... S-19
Net Servicing Fee Rate.....................................................  S-8
Portfolio..................................................................  S-9
Receivables................................................................  S-1
Reference Banks............................................................ S-20
Revolving Period...........................................................  S-7
Series Cut-Off Date........................................................  S-7
Series Issuance Date.......................................................  S-7
Series Supplement..........................................................  S-6
Series Termination Date....................................................  S-8
Servicer Interchange Rate..................................................  S-8
Summary of Terms...........................................................  S-3
Telerate Page 3750......................................................... S-20
Trust......................................................................  S-1
Trust Cut-Off Date......................................................... S-12
Underwriters............................................................... S-22
Underwriting Agreements.................................................... S-22
</TABLE>
 
                                      S-24
<PAGE>
 
                                    ANNEX I
 
                   PRIOR ISSUANCES OF INVESTOR CERTIFICATES
 
  The tables below set forth the principal characteristics of the Credit Card
Participation Certificates, Series 1991-3, 1991-6, 1993-2, 1993-3, 1994-2,
1994-3, 1994-4, 1995-1, 1995-3, 1995-6, 1995-A, 1995-J1, 1995-7, 1995-8, 1995-
9, 1995-10, 1995-11, 1996-1, 1996-2, 1996-3, 1996-4, 1996-5, 1996-6, 1997-1,
1997-2, 1997-3, 1997-4, 1997-5, 1997-6, 1997-7, 1997-8, 1997-9, 1997-10, 1998-
1, 1998-2, 1998-3, 1998-4, 1998-5 and 1998-6, the only other Series heretofore
issued by the Trust and still outstanding. For more specific information with
respect to any Series, any prospective investor should contact the Servicer at
(212) 559-0148. The Servicer will provide, without charge, to any prospective
purchaser of Investor Certificates, a copy of the Disclosure Documents for any
previous or concurrent publicly issued Series.
 
1. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1991-3
 
Group...................................................................... One
Class A Invested Amount........................................... $875,000,000
Class B Invested Amount........................................... $109,000,000
Class A Certificate Rate...................................... 8 7/8% per annum
Class B Certificate Rate...................................... 9 1/4% per annum
Class A Expected Final Payment Date................ July 1998 Distribution Date
Class B Expected Final Payment Date........... September 1998 Distribution Date
Initial Cash Collateral Amount..................................... $68,880,000
Series Servicing Fee Rate*..................................... 1.87% per annum
Series Termination Date....................... September 1999 Distribution Date
Series Issuance Date............................................. June 27, 1991
 
2. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1991-6
 
Group...................................................................... One
Class A Invested Amount........................................... $850,000,000
Class B Invested Amount........................................... $105,500,000
Class A Certificate Rate...................................... 7.875% per annum
Class B Certificate Rate...................................... 8.350% per annum
Class A Expected Final Payment Date............ November 1998 Distribution Date
Class B Expected Final Payment Date............. January 1999 Distribution Date
Initial Cash Collateral Amount..................................... $47,775,000
Stated L/C Amount.................................................. $19,110,000
Series Servicing Fee Rate*..................................... 1.87% per annum
Series Termination Date......................... January 2000 Distribution Date
Series Issuance Date......................................... November 20, 1991
 
- --------
* With respect to Series 1991-3 and Series 1991-6, the Series Servicing Fee
  did not include any Servicer Interchange or similar amount. As a result, the
  term "Portfolio Yield", when used with respect to either such Series, would
  not be reduced by the amount of any Servicer Interchange or similar amount
  with respect to any Series. See "Special Considerations--Master Trust
  Considerations--The Ability of Citibank (South Dakota) to Change Terms of
  the Accounts" in the Prospectus.
 
                                      I-1
<PAGE>
 
3. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1993-2
 
Group....................................................................... One
Class A Invested Amount............................................ $750,000,000
Class B Invested Amount............................................. $48,000,000
Class A Certificate Rate........................................ 5.95% per annum
Class B Certificate Rate........................................ 6.15% per annum
Class A Expected Final Payment Date............ September 2003 Distribution Date
Class B Expected Final Payment Date.............. October 2003 Distribution Date
Initial Shared Enhancement Amount................................... $39,900,000
Initial Class B Enhancement Amount.................................. $15,960,000
Series Servicing Fee Rate....................................... 0.37% per annum
Series Termination Date.......................... October 2004 Distribution Date
Series Issuance Date.......................................... September 2, 1993
 
4. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1993-3
 
Group....................................................................... One
Class A Invested Amount............................................ $750,000,000
Class B Invested Amount............................................. $48,000,000
Class A Certificate Rate........................................ 5.50% per annum
Class B Certificate Rate........................................ 5.70% per annum
Class A Expected Final Payment Date.............. January 1999 Distribution Date
Class B Expected Final Payment Date............. February 1999 Distribution Date
Initial Shared Enhancement Amount................................... $39,900,000
Initial Class B Enhancement Amount.................................. $15,960,000
Series Servicing Fee Rate....................................... 0.37% per annum
Series Termination Date......................... February 2000 Distribution Date
Series Issuance Date.......................................... December 21, 1993
 
5. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1994-2
 
Group....................................................................... One
Class A Invested Amount............................................ $940,000,000
Class B Invested Amount............................................. $60,000,000
Class A Certificate Rate........................................ 7.25% per annum
Class B Certificate Rate........................................ 7.50% per annum
Class A Expected Final Payment Date................ April 2006 Distribution Date
Class B Expected Final Payment Date................ April 2006 Distribution Date
Initial Shared Enhancement Amount................................... $50,000,000
Initial Class B Enhancement Amount.................................. $20,000,000
Series Servicing Fee Rate....................................... 0.37% per annum
Series Termination Date............................ April 2008 Distribution Date
Series Issuance Date............................................. March 30, 1994
 
                                      I-2
<PAGE>
 
6. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1994-3
 
<TABLE>
<S>                                                                         <C>
Group...................................................................... One
Class A Invested Amount........................................... $500,000,000
Class B Invested Amount............................................ $32,000,000
Class A Certificate Rate....................................... 6.80% per annum
Class B Certificate Rate....................................... 7.00% per annum
Class A Expected Final Payment Date............... April 1999 Distribution Date
Class B Expected Final Payment Date............... April 1999 Distribution Date
Initial Shared Enhancement Amount.................................. $26,600,000
Initial Class B Enhancement Amount................................. $10,640,000
Series Servicing Fee Rate...................................... 0.37% per annum
Series Termination Date........................... April 2001 Distribution Date
Series Issuance Date............................................ April 14, 1994
 
7. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1994-4
 
Group.................................................................. One
Class A Invested Amount....................................... $750,000,000
Class B Invested Amount........................................ $48,000,000
Class A Certificate Rate................................... 8.25% per annum
Class B Certificate Rate..................................... Floating Rate
Class A Expected Final Payment Date........ November 2001 Distribution Date
Class B Expected Final Payment Date........ November 2001 Distribution Date
Initial Shared Enhancement Amount.............................. $39,900,000
Initial Class B Enhancement Amount............................. $15,960,000
Series Servicing Fee Rate.................................. 0.37% per annum
Series Termination Date.................... November 2003 Distribution Date
Series Issuance Date..................................... December 14, 1994
 
8. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1995-1
 
Group.................................................................. One
Class A Invested Amount....................................... $625,000,000
Class B Invested Amount........................................ $40,000,000
Class A Certificate Rate................................... 8.25% per annum
Class B Certificate Rate................................... 8.45% per annum
Class A Expected Final Payment Date......... January 2005 Distribution Date
Class B Expected Final Payment Date......... January 2005 Distribution Date
Initial Shared Enhancement Amount.............................. $33,250,000
Initial Class B Enhancement Amount............................. $13,300,000
Series Servicing Fee Rate.................................. 0.37% per annum
Series Termination Date..................... January 2007 Distribution Date
Series Issuance Date...................................... January 20, 1995
</TABLE>
 
                                      I-3
<PAGE>
 
9. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1995-3
 
Group...................................................................... One
Class A Invested Amount........................................... $625,000,000
Class B Invested Amount............................................ $40,000,000
Class A Certificate Rate....................................... 7.85% per annum
Class B Certificate Rate......................................... Floating Rate
Class A Expected Final Payment Date............ February 2000 Distribution Date
Class B Expected Final Payment Date............ February 2000 Distribution Date
Initial Shared Enhancement Amount.................................. $33,250,000
Initial Class B Enhancement Amount................................. $13,300,000
Series Servicing Fee Rate...................................... 0.37% per annum
Series Termination Date........................ February 2002 Distribution Date
Series Issuance Date......................................... February 16, 1995
 
10. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1995-6
 
Group...................................................................... One
Class A Invested Amount........................................... $750,000,000
Class B Invested Amount............................................ $48,000,000
Class A Certificate Rate....................................... 6.75% per annum
Class B Certificate Rate....................................... 6.90% per annum
Class A Expected Final Payment Date................ June 1998 Distribution Date
Class B Expected Final Payment Date................ June 1998 Distribution Date
Initial Shared Enhancement Amount.................................. $39,900,000
Initial Class B Enhancement Amount................................. $15,960,000
Series Servicing Fee Rate...................................... 0.37% per annum
Series Termination Date............................ June 2000 Distribution Date
Series Issuance Date.............................................. May 11, 1995
 
11. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1995-A
 
Group...................................................................... One
Class A Invested Amount........................................... $300,000,000
Class B Invested Amount............................................ $19,150,000
Class A Certificate Rate......................................... Floating Rate
Class B Certificate Rate......................................... Floating Rate
Class A Expected Final Payment Date................ September 1998 Payment Date
Class B Expected Final Payment Date................ September 1998 Payment Date
Initial Shared Enhancement Amount.................................. $15,957,500
Initial Class B Enhancement Amount.................................. $6,383,000
Series Servicing Fee Rate...................................... 0.37% per annum
Series Termination Date............................ September 2000 Payment Date
Series Issuance Date............................................ August 2, 1995
 
                                      I-4
<PAGE>
 
12. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1995-J1
 
Group...................................................................... One
Class A Invested Amount........................................... $340,715,503
Class B Invested Amount............................................ $21,750,000
Class A Certificate Rate........................................ 2.1% per annum
Class B Certificate Rate......................................... Floating Rate
Class A Expected Final Payment Date.............. August 2000 Distribution Date
Class B Expected Final Payment Date.............. August 2000 Distribution Date
Initial Shared Enhancement Amount.................................. $18,123,276
Initial Class B Enhancement Amount.................................. $7,249,310
Series Servicing Fee Rate...................................... 0.37% per annum
Series Termination Date.......................... August 2002 Distribution Date
Series Issuance Date............................................ August 7, 1995
 
13. CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1995-7
 
Group.......................................................................One
Maximum Allocable Invested Amount................................$4,000,000,000
Certificate Rate..................................................Floating Rate
Required Available Cash Collateral Amount.......7.75% of the Allocable Invested
 Amount
Series Servicing Fee Rate.......................................0.37% per annum
Earliest Possible Series Termination Date.........August 2001 Distribution Date
Series Issuance Date............................................August 17, 1995
 
14. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1995-8
 
Group.......................................................................One
Class A Invested Amount............................................$400,000,000
Class B Invested Amount.............................................$25,540,000
Class A Certificate Rate........................................6.70% per annum
Class B Certificate Rate........................................6.85% per annum
Class A Expected Final Payment Date............September 2000 Distribution Date
Class B Expected Final Payment Date............September 2000 Distribution Date
Earliest Possible Initial Principal Payment Date....September 1998 Distribution
 Date
Initial Shared Enhancement Amount...................................$21,277,000
Initial Class B Enhancement Amount...................................$8,510,800
Series Servicing Fee Rate.......................................0.37% per annum
Series Termination Date........................September 2002 Distribution Date
Series Issuance Date..........................................September 7, 1995
 
15. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1995-9
 
Group.......................................................................One
Class A Invested Amount............................................$500,000,000
Class B Invested Amount.............................................$32,000,000
Class A Certificate Rate........................................6.55% per annum
Class B Certificate Rate........................................6.65% per annum
Class A Expected Final Payment Date..............October 2005 Distribution Date
Class B Expected Final Payment Date..............October 2005 Distribution Date
Initial Shared Enhancement Amount...................................$26,600,000
Initial Class B Enhancement Amount..................................$10,640,000
Series Servicing Fee Rate.......................................0.37% per annum
Series Termination Date..........................October 2007 Distribution Date
Series Issuance Date...........................................October 13, 1995
 
 
                                      I-5
<PAGE>
 
16. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1995-10
 
Group.......................................................................One
Class A Invested Amount............................................$750,000,000
Class B Invested Amount.............................................$48,000,000
Class A Certificate Rate........................................5.90% per annum
Class B Certificate Rate........................................6.05% per annum
Class A Expected Final Payment Date.............February 1999 Distribution Date
Class B Expected Final Payment Date.............February 1999 Distribution Date
Initial Shared Enhancement Amount...................................$39,900,000
Initial Class B Enhancement Amount..................................$15,960,000
Series Servicing Fee Rate.......................................0.37% per annum
Series Termination Date.........................February 2001 Distribution Date
Series Issuance Date..........................................November 16, 1995
 
17. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1995-11
 
Group.......................................................................One
Class A Invested Amount............................................$625,000,000
Class B Invested Amount.............................................$40,000,000
Class A Certificate Rate..........................................Floating Rate
Class B Certificate Rate..........................................Floating Rate
Class A Expected Final Payment Date..................November 1998 Payment Date
Class B Expected Final Payment Date..................November 1998 Payment Date
Initial Shared Enhancement Amount...................................$33,250,000
Initial Class B Enhancement Amount..................................$13,300,000
Series Servicing Fee Rate.......................................0.37% per annum
Series Termination Date..............................November 2000 Payment Date
Series Issuance Date..........................................November 29, 1995
 
18. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1996-1
 
Group.......................................................................One
Class A Face Amount(1)...........................................$1,000,000,000
Class B Face Amount(1)..............................................$64,000,000
Class A Initial Invested Amount....................................$748,172,375
Class B Initial Invested Amount.....................................$47,532,597
Class A Invested Amount as of the April 1998 Distribution Date.....$849,017,947
Class B Invested Amount as of the April 1998 Distribution Date......$54,112,440
Class A Certificate Rate............................................Zero Coupon
Class B Certificate Rate............................................Zero Coupon
Class A Accretion Rate.......................................5.79069% per annum
Class B Accretion Rate......................................5.937664% per annum
Class A Expected Final Payment Date.............February 2001 Distribution Date
Class B Expected Final Payment Date.............February 2001 Distribution Date
Initial Shared Enhancement Amount...................................$53,200,000
Initial Class B Enhancement Amount..................................$21,280,000
Series Servicing Fee Rate.......................................0.37% per annum
Series Termination Date.........................February 2003 Distribution Date
Series Issuance Date...........................................January 29, 1996
- --------
(1) Indicates amount payable to the Certificateholders at maturity assuming,
    among other things, that (a) neither an Early Amortization Event nor an
    Accretion Termination Event occurs and (b) the monthly accretion amount
    with respect to each Class of Investor Certificates is fully funded each
    month prior to the Expected Final Payment Date for such Class.
 
                                      I-6
<PAGE>
 
19. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1996-2
 
Group........................................................................One
Class A Invested Amount.............................................$500,000,000
Class B Invested Amount..............................................$32,000,000
Class A Certificate Rate........................................5.625% per annum
Class B Certificate Rate...........................................Floating Rate
Class A Expected Final Payment Date......................March 2001 Payment Date
Class B Expected Final Payment Date......................March 2001 Payment Date
Initial Shared Enhancement Amount....................................$26,600,000
Initial Class B Enhancement Amount...................................$10,640,000
Series Servicing Fee Rate........................................0.37% per annum
Series Termination Date..................................March 2003 Payment Date
Series Issuance Date................................................March 7,1996
 
20. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1996-3
 
Group........................................................................One
Class A Invested Amount.............................................$664,761,018
Class B Invested Amount..............................................$42,440,000
Class A Certificate Rate...........................................Floating Rate
Class B Certificate Rate...........................................Floating Rate
Class A Expected Final Payment Date........................May 1999 Payment Date
Class B Expected Final Payment Date...................May 1999 Distribution Date
Initial Shared Enhancement Amount....................................$35,360,051
Initial Class B Enhancement Amount...................................$14,144,020
Series Servicing Fee Rate........................................0.37% per annum
Series Termination Date....................................May 2001 Payment Date
Series Issuance Date................................................May 15, 1996
 
21. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1996-4
 
Group........................................................................One
Class A Invested Amount.............................................$675,082,698
Class B Invested Amount..............................................$43,200,000
Class A Certificate Rate...........................................Floating Rate
Class B Certificate Rate...........................................Floating Rate
Class A Expected Final Payment Date.....................August 2001 Payment Date
Class B Expected Final Payment Date................August 2001 Distribution Date
Initial Shared Enhancement Amount....................................$35,914,135
Initial Class B Enhancement Amount...................................$14,365,654
Series Servicing Fee Rate........................................0.37% per annum
Series Termination Date.................................August 2003 Payment Date
Series Issuance Date.............................................August 22, 1996
 
                                      I-7
<PAGE>
 
22. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1996-5
 
Group........................................................................One
Class A Invested Amount.............................................$750,000,000
Class B Invested Amount..............................................$48,000,000
Class A Certificate Rate...........................................Floating Rate
Class B Certificate Rate...........................................Floating Rate
Class A Expected Final Payment Date..................September 2003 Payment Date
Class B Expected Final Payment Date..................September 2003 Payment Date
Initial Shared Enhancement Amount....................................$39,900,000
Initial Class B Enhancement Amount...................................$15,960,000
Series Servicing Fee Rate........................................0.37% per annum
Series Termination Date..............................September 2005 Payment Date
Series Issuance Date.............................................August 29, 1996
 
23. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1996-6
 
Group........................................................................One
Class A Invested Amount.............................................$940,000,000
Class B Invested Amount..............................................$60,000,000
Class A Certificate Rate...........................................Floating Rate
Class B Certificate Rate...........................................Floating Rate
Class A Expected Final Payment Date...................December 2006 Payment Date
Class B Expected Final Payment Date...................December 2006 Payment Date
Initial Shared Enhancement Amount....................................$50,000,000
Initial Class B Enhancement Amount...................................$20,000,000
Series Servicing Fee Rate........................................0.37% per annum
Series Termination Date...............................December 2008 Payment Date
Series Issuance Date............................................December 3, 1996
 
24. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1997-1
 
Group........................................................................One
Class A Invested Amount.............................................$250,000,000
Class B Invested Amount..............................................$16,000,000
Class A Certificate Rate.........................................6.25% per annum
Class B Certificate Rate...........................................Floating Rate
Class A Expected Final Payment Date..............February 2000 Distribution Date
Class B Expected Final Payment Date..............February 2000 Distribution Date
Initial Shared Enhancement Amount....................................$13,300,000
Initial Class B Enhancement Amount....................................$5,320,000
Series Servicing Fee Rate........................................0.37% per annum
Series Termination Date..........................February 2002 Distribution Date
Series Issuance Date...........................................February 10, 1997
 
                                      I-8
<PAGE>
 
25. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1997-2
 
Group........................................................................One
Class A Invested Amount.............................................$750,000,000
Class B Invested Amount..............................................$48,000,000
Class A Certificate Rate.........................................6.55% per annum
Class B Certificate Rate.........................................6.70% per annum
Class A Expected Final Payment Date..............February 2002 Distribution Date
Class B Expected Final Payment Date..............February 2002 Distribution Date
Initial Shared Enhancement Amount....................................$39,900,000
Initial Class B Enhancement Amount...................................$15,960,000
Series Servicing Fee Rate........................................0.37% per annum
Series Termination Date..........................February 2004 Distribution Date
Series Issuance Date............................................January 28, 1997
 
26. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1997-3
 
Group........................................................................One
Class A Invested Amount.............................................$400,000,000
Class B Invested Amount..............................................$25,540,000
Class A Certificate Rate........................................6.839% per annum
Class B Certificate Rate....................................... 6.989% per annum
Class A Expected Final Payment Date......February 2002 Distribution Date Class B
Expected Final Payment Date......................February 2002 Distribution Date
Earliest Possible Initial Principal Payment Date......February 2000 Distribution
Date
Initial Shared Enhancement Amount....................................$21,277,000
Initial Class B Enhancement Amount....................................$8,510,800
Series Servicing Fee Rate........................................0.37% per annum
Series Termination Date..........................February 2004 Distribution Date
Series Issuance Date...........................................February 10, 1997
 
27. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1997-4
 
Group....................................................................... One
Class A Invested Amount............................................ $750,000,000
Class B Invested Amount............................................. $48,000,000
Class A Certificate Rate.......................................... Floating Rate
Class B Certificate Rate.......................................... Floating Rate
Class A Expected Final Payment Date................ March 2009 Distribution Date
Class B Expected Final Payment Date................ March 2009 Distribution Date
Initial Shared Enhancement Amount................................... $39,900,000
Initial Class B Enhancement Amount.................................. $15,960,000
Series Servicing Fee Rate....................................... 0.37% per annum
Series Termination Date............................ March 2011 Distribution Date
Series Issuance Date.......................................... February 20, 1997
 
                                      I-9
<PAGE>
 
28. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1997-5
 
Group...................................................................... One
Class A Invested Amount........................................... $567,375,887
Class B Invested Amount............................................ $36,342,987
Class A Certificate Rate....................................... 5.75% per annum
Class B Certificate Rate....................................... 6.00% per annum
Class A Expected Final Payment Date..................... July 2007 Payment Date
Class B Expected Final Payment Date..................... July 2007 Payment Date
Initial Shared Enhancement Amount.................................. $30,185,944
Initial Class B Enhancement Amount................................. $12,074,377
Series Servicing Fee Rate...................................... 0.37% per annum
Series Termination Date................................. July 2009 Payment Date
Series Issuance Date............................................. July 24, 1997
 
29. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1997-6
 
Group.......................................................................One
Class A Face Amount(1)...........................................$1,000,000,000
Class B Face Amount(1)..............................................$64,000,000
Class A Initial Invested Amount....................................$642,086,168
Class B Initial Invested Amount.....................................$40,676,219
Class A Invested Amount as of the April 1998 Distribution Date.....$670,596,358
Class B Invested Amount as of the April 1998 Distribution Date......$42,524,884
Class A Certificate Rate............................................Zero Coupon
Class B Certificate Rate............................................Zero Coupon
Class A Accretion Rate....................................6.32311704% per annum
Class B Accretion Rate....................................6.46918258% per annum
Class A Expected Final Payment Date...............August 2004 Distribution Date
Class B Expected Final Payment Date...............August 2004 Distribution Date
Initial Shared Enhancement Amount...................................$53,200,000
Initial Class B Enhancement Amount..................................$21,280,000
Series Servicing Fee Rate.......................................0.37% per annum
Series Termination Date...........................August 2006 Distribution Date
Series Issuance Date.............................................August 7, 1997
 
30. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1997-7
 
Group.......................................................................One
Class A Invested Amount............................................$625,000,000
Class B Invested Amount.............................................$40,000,000
Class A Certificate Rate........................................6.35% per annum
Class B Certificate Rate........................................6.45% per annum
Class A Expected Final Payment Date...............August 2000 Distribution Date
Class B Expected Final Payment Date...............August 2000 Distribution Date
Initial Shared Enhancement Amount...................................$33,250,000
Initial Class B Enhancement Amount..................................$13,300,000
Series Servicing Fee Rate.......................................0.37% per annum
Series Termination Date...........................August 2002 Distribution Date
Series Issuance Date............................................August 18, 1997
- --------
(1) Indicates amount payable to the Certificateholders at maturity assuming,
    among other things, that (a) neither an Early Amortization Event nor an
    Accretion Termination Event occurs and (b) the monthly accretion amount
    with respect to each Class of Investor Certificates is fully funded each
    month prior to the Expected Final Payment Date for such Class.
 
                                     I-10
<PAGE>
 
31. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1997-8
 
Group....................................................................... One
Class A Invested Amount............................................ $750,000,000
Class B Invested Amount............................................. $48,000,000
Class A Certificate Rate.......................................... Floating Rate
Class B Certificate Rate.......................................... Floating Rate
Class A Expected Final Payment Date............ September 2000 Distribution Date
Class B Expected Final Payment Date............ September 2000 Distribution Date
Initial Shared Enhancement Amount................................... $39,900,000
Initial Class B Enhancement Amount.................................. $15,960,000
Series Servicing Fee Rate....................................... 0.37% per annum
Series Termination Date........................ September 2002 Distribution Date
Series Issuance Date......................................... September 15, 1997
 
32. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1997-9
 
Group........................................................................One
Class A Invested Amount.............................................$678,195,999
Class B Invested Amount..............................................$43,404,544
Class A Certificate Rate.........................................3.25% per annum
Class B Certificate Rate.........................................3.50% per annum
Class A Expected Final Payment Date...................November 2002 Payment Date
Class B Expected Final Payment Date...................November 2002 Payment Date
Initial Shared Enhancement Amount....................................$36,080,027
Initial Class B Enhancement Amount...................................$14,432,011
Series Servicing Fee Rate........................................0.37% per annum
Series Termination Date...............................November 2004 Payment Date
Series Issuance Date...........................................November 25, 1997
 
33. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1997-10
 
Group....................................................................... One
Class A Invested Amount............................................ $500,000,000
Class B Invested Amount............................................. $32,000,000
Class A Certificate Rate.......................................... Floating Rate
Class B Certificate Rate.......................................... Floating Rate
Class A Expected Final Payment Date............. November 1999 Distribution Date
Class B Expected Final Payment Date............. November 1999 Distribution Date
Initial Shared Enhancement Amount................................... $26,600,000
Initial Class B Enhancement Amount.................................. $10,640,000
Series Servicing Fee Rate....................................... 0.37% per annum
Series Termination Date......................... November 2001 Distribution Date
Series Issuance Date.......................................... November 10, 1997
 
                                      I-11
<PAGE>
 
34. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1998-1
 
Group....................................................................... One
Class A Invested Amount............................................ $750,000,000
Class B Invested Amount............................................. $48,000,000
Class A Certificate Rate....................................... 5.750% per annum
Class B Certificate Rate....................................... 5.875% per annum
Class A Expected Final Payment Date.............. January 2001 Distribution Date
Class B Expected Final Payment Date.............. January 2001 Distribution Date
Initial Shared Enhancement Amount................................... $39,900,000
Initial Class B Enhancement Amount.................................. $15,960,000
Series Servicing Fee Rate....................................... 0.37% per annum
Series Termination Date.......................... January 2003 Distribution Date
Series Issuance Date........................................... January 14, 1998
 
35. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1998-2
 
Group....................................................................... One
Class A Invested Amount............................................ $500,000,000
Class B Invested Amount............................................. $32,000,000
Class A Certificate Rate........................................ 6.05% per annum
Class B Certificate Rate........................................ 6.20% per annum
Class A Expected Final Payment Date.............. January 2008 Distribution Date
Class B Expected Final Payment Date.............. January 2008 Distribution Date
Initial Shared Enhancement Amount................................... $26,600,000
Initial Class B Enhancement Amount.................................. $10,640,000
Series Servicing Fee Rate....................................... 0.37% per annum
Series Termination Date.......................... January 2010 Distribution Date
Series Issuance Date........................................... January 15, 1998
 
36. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1998-3
 
Group....................................................................... One
Class A Invested Amount............................................ $625,000,000
Class B Invested Amount............................................. $40,000,000
Class A Certificate Rate........................................ 5.80% per annum
Class B Certificate Rate........................................ 5.95% per annum
Class A Expected Final Payment Date............. February 2003 Distribution Date
Class B Expected Final Payment Date............. February 2003 Distribution Date
Initial Shared Enhancement Amount................................... $33,250,000
Initial Class B Enhancement Amount.................................. $13,300,000
Series Servicing Fee Rate....................................... 0.37% per annum
Series Termination Date......................... February 2005 Distribution Date
Series Issuance Date........................................... January 29, 1998
 
                                      I-12
<PAGE>
 
37. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1998-4
 
Group....................................................................... One
Class A Invested Amount............................................ $504,201,681
Class B Invested Amount............................................. $32,184,000
Class A Certificate Rate........................................ 3.25% per annum
Class B Certificate Rate.......................................... Floating Rate
Class A Expected Final Payment Date................... October 2006 Payment Date
Class B Expected Final Payment Date................... October 2006 Payment Date
Initial Shared Enhancement Amount................................... $27,060,029
Initial Class B Enhancement Amount.................................. $10,824,008
Series Servicing Fee Rate....................................... 0.37% per annum
Series Termination Date............................... October 2008 Payment Date
Series Issuance Date............................................. April 16, 1998
 
38. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1998-5
 
Group....................................................................... One
Class A Invested Amount............................................ $683,732,633
Class B Invested Amount............................................. $43,758,889
Class A Certificate Rate....................................... 4.875% per annum
Class B Certificate Rate....................................... 5.125% per annum
Class A Expected Final Payment Date..................... April 2005 Payment Date
Class B Expected Final Payment Date..................... April 2005 Payment Date
Initial Shared Enhancement Amount................................... $36,374,576
Initial Class B Enhancement Amount.................................. $14,549,831
Series Servicing Fee Rate....................................... 0.37% per annum
Series Termination Date................................. April 2007 Payment Date
Series Issuance Date.............................................. April 7, 1998
 
39. CLASS A AND CLASS B CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1998-6
 
Group....................................................................... One
Class A Invested Amount............................................ $750,000,000
Class B Invested Amount............................................. $48,000,000
Class A Certificate Rate........................................ 5.85% per annum
Class B Certificate Rate........................................ 6.00% per annum
Class A Expected Final Payment Date..................... April 2001 Payment Date
Class B Expected Final Payment Date..................... April 2001 Payment Date
Initial Shared Enhancement Amount................................... $39,900,000
Initial Class B Enhancement Amount.................................. $15,960,000
Series Servicing Fee Rate....................................... 0.37% per annum
Series Termination Date................................. April 2003 Payment Date
Series Issuance Date.............................................. April 9, 1998
 
 
                                      I-13
<PAGE>
 
PROSPECTUS
 
CITIBANK CREDIT CARD MASTER TRUST I
CREDIT CARD PARTICIPATION CERTIFICATES
 
CITIBANK (SOUTH DAKOTA), N.A.
SELLER AND SERVICER
 
CITIBANK (NEVADA), NATIONAL ASSOCIATION
SELLER
 
Citibank (South Dakota), N.A. and Citibank (Nevada), National Association, as
sellers (collectively, the "Banks"), may sell from time to time one or more
series (each a "Series") of credit card participation certificates consisting
of Class A Credit Card Participation Certificates (the "Class A Certificates")
and Class B Credit Card Participation Certificates (the "Class B
Certificates"; the Class A Certificates and the Class B Certificates of a
particular Series are collectively referred to herein as the "Investor
Certificates") evidencing undivided interests in certain assets of Citibank
Credit Card Master Trust I (the "Trust"), created by the Banks. The Investor
Certificates of a Series will be offered on terms determined at the time of
sale. Investor Certificates may be sold for U.S. dollars or for one or more
foreign or composite currencies and the principal of and any interest on
Investor Certificates may be payable in U.S. dollars or in one or more foreign
or composite currencies.
 
The Trust assets include receivables (the "Receivables") generated from time
to time in a portfolio of revolving credit card accounts and collections
thereon. The fractional undivided interest in the Trust represented by the
Class B Certificates of a Series will be subordinated to the Class A
Certificates of such Series to the extent described herein and in an
accompanying prospectus supplement (a "Prospectus Supplement") relating to
such Series. The Trust previously has issued other Series of investor
certificates which evidence undivided interests in the Trust and additional
Series of investor certificates are expected to be issued from time to time by
the Trust.
 
While the specific terms of any Series in respect of which this Prospectus is
being delivered will be described in the related Prospectus Supplement, the
terms of such Series will not be subject to prior review by, or consent of
holders of, the investor certificates of any previously issued Series.
 
POTENTIAL INVESTORS SHOULD CONSIDER, AMONG OTHER THINGS, THE DISCUSSION UNDER
"SPECIAL CONSIDERATIONS" THAT BEGINS ON PAGE 13.
 
THE INVESTOR CERTIFICATES REPRESENT BENEFICIAL INTERESTS IN THE TRUST ONLY AND
DO NOT REPRESENT INTERESTS IN OR OBLIGATIONS OF THE BANKS OR CITICORP OR ANY
AFFILIATE THEREOF. NEITHER THE INVESTOR CERTIFICATES NOR THE UNDERLYING
ACCOUNTS OR RECEIVABLES ARE INSURED OR GUARANTEED BY THE FEDERAL DEPOSIT
INSURANCE CORPORATION OR ANY OTHER GOVERNMENTAL AGENCY OR INSTRUMENTALITY.
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS
A CRIMINAL OFFENSE.
 
The Investor Certificates may be sold by the Banks directly to purchasers,
through agents designated from time to time, through underwriting syndicates
led by one or more managing underwriters or through one or more underwriters
acting alone. If underwriters or agents are involved in the offering of the
Investor Certificates, the name of the managing underwriter or underwriters or
agents will be set forth in the related Prospectus Supplement. If an
underwriter, agent or dealer is involved in the offering of the Investor
Certificates, the underwriter's discount, agent's commission or dealer's
purchase price will be set forth in, or may be calculated from, the related
Prospectus Supplement, and the net proceeds to the Banks from such offering
will be the public offering price of the Investor Certificates less such
discount in the case of an underwriter, the purchase price of the Investor
Certificates less such commission in the case of an agent or the purchase
price of the Investor Certificates in the case of a dealer, and less, in each
case, the other expenses of the Banks associated with the issuance and
distribution of the Investor Certificates. Affiliates of the Banks may from
time to time act as agents or underwriters in connection with the sale of the
Investor Certificates. Also, affiliates of the Banks may from time to time act
as principals or agents in connection with market-making transactions in the
Investor Certificates. See "Plan of Distribution".
 
THIS PROSPECTUS MAY NOT BE USED TO CONSUMMATE SALES OF INVESTOR CERTIFICATES
UNLESS ACCOMPANIED BY A PROSPECTUS SUPPLEMENT.
 
                  The date of this Prospectus is May 14, 1998
<PAGE>
 
                             AVAILABLE INFORMATION
 
  Citibank (South Dakota), N.A. and Citibank (Nevada), National Association,
as originators of the Trust, have filed a Registration Statement under the
Securities Act of 1933, as amended (the "Securities Act"), with the Securities
and Exchange Commission (the "Commission") with respect to the Investor
Certificates offered pursuant to this Prospectus. For further information,
reference is made to the Registration Statement (including any amendments
thereof and exhibits thereto) and the reports and other documents incorporated
herein by reference as described below under "Incorporation of Certain
Documents by Reference", which are available for inspection without charge at
the public reference facilities maintained by the Commission at 450 Fifth
Street, N.W., Washington, D.C. 20549; 7 World Trade Center, New York, New York
10048; and Citicorp Center, 500 West Madison Street, Suite 1400, Chicago,
Illinois 60661. Copies of such material may be obtained from the Public
Reference Section of the Commission at 450 Fifth Street, N.W., Washington,
D.C. 20549, at prescribed rates. In addition, any such reports or other
documents filed with the Commission through its Electronic Data Gathering,
Analysis and Retrieval system are publicly available through the Commission's
Web site (http://www.sec.gov).
 
                         REPORTS TO CERTIFICATEHOLDERS
 
  Unless and until Definitive Certificates are issued, Monthly Reports, which
contain unaudited information concerning the Trust and are prepared by the
Servicer or the Paying Agent, will be sent on behalf of the Trust to Cede &
Co. ("Cede"), as nominee of The Depository Trust Company ("DTC") and
registered holder of the Investor Certificates offered hereby, pursuant to the
Pooling Agreement and the Series Supplement. See "Series Provisions--Reports"
and "The Pooling Agreement Generally--Book-Entry Registration" and "--Evidence
as to Compliance". Such reports will not constitute financial statements
prepared in accordance with generally accepted accounting principles. The
Pooling Agreement and the Series Supplement do not require the sending of, and
the Banks do not intend to send, any of their financial reports to holders of
interests in Class A Certificates (the "Class A Certificateholders") or
holders of interests in Class B Certificates (the "Class B
Certificateholders"; the Class A Certificateholders and the Class B
Certificateholders are collectively referred to herein as the "Investor
Certificateholders"). Copies of the Monthly Reports may be obtained free of
charge upon request by calling (718) 248-5163. The Servicer will file with the
Commission such periodic reports with respect to the Trust as are required
under the Securities Exchange Act of 1934, as amended (the "Exchange Act"),
and the rules and regulations of the Commission thereunder.
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
  The following documents filed with the Commission by the Servicer, on behalf
of the Trust, are incorporated in this Prospectus by reference: the Trust's
Annual Report on Form 10-K for the year ended December 31, 1997, the Trust's
Current Reports on Form 8-K dated January 21, 1998 and April 23, 1998 and the
Trust's Current Reports on Form 8-K filed since December 31, 1997 which
include the information contained in the monthly reports concerning the Trust
that were prepared by the Servicer. See "Series Provisions--Reports".
 
  All reports and other documents filed by the Servicer, on behalf of the
Trust, pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange Act
subsequent to the date of this Prospectus and prior to the termination of the
offering of the Investor Certificates offered hereby shall be deemed to be
incorporated by reference into this Prospectus and to be part hereof. Any
statement contained herein or in a document incorporated or deemed to be
incorporated by reference herein shall be deemed to be modified or superseded
for purposes of this Prospectus to the extent that a statement contained
herein or in any other subsequently filed document which also is or is deemed
to be incorporated by reference herein modifies or supersedes such statement.
Any such statement so modified or superseded shall not be deemed, except as so
modified or superseded, to constitute a part of this Prospectus.
 
  The Servicer will provide without charge to each person, including any
beneficial owner of Investor Certificates, to whom a copy of this Prospectus
is delivered, on the written or oral request of any such person, a copy of any
of or all the documents incorporated herein by reference (other than exhibits
to such documents). Written requests for such copies should be directed to Mr.
Hugh F. Van Deventer, IV at Citicorp Credit Services, Inc., Citicorp Center,
153 East 53rd Street, 6th Floor, New York, New York 10043. Telephone requests
for such copies should be directed to the Servicer at (212) 559-0148.
 
                                       2
<PAGE>
 
                               PROSPECTUS SUMMARY
 
  The following summary is qualified in its entirety by reference to the
detailed information appearing elsewhere in this Prospectus and in any
accompanying Prospectus Supplement. Reference is made to the Glossary for the
location herein of the definitions of certain capitalized terms used herein.
Unless the context requires otherwise, capitalized terms used in this
Prospectus and in any accompanying Prospectus Supplement refer only to the
particular Series being offered by such Prospectus Supplement.
 
Issuer.....................  Citibank Credit Card Master Trust I (the "Trust").
                              The Trust, as a master trust, previously has
                              issued other Series of investor certificates, the
                              terms of which are summarized in "Annex I:
                              Prior Issuances of Investor Certificates" in the
                              related Prospectus Supplement, and is expected to
                              issue additional Series from time to time and to
                              continue as a trust after the Series Termination
                              Date with respect to the Investor Certificates.
                              The assets of the Trust are expected to change
                              over the life of the Trust as receivables in
                              revolving credit card accounts and related assets
                              are included in the Trust and as receivables in
                              accounts subject to the Trust are charged-off or
                              removed. See "The Trust" and "Master Trust
                              Provisions--Addition of Trust Assets", "--Removal
                              of Accounts" and "--New Issuances".
 
Banks......................  Citibank (South Dakota), N.A. ("Citibank (South
                              Dakota)") and Citibank (Nevada), National
                              Association ("Citibank (Nevada)" and, together
                              with Citibank (South Dakota), the "Banks"), each
                              a national banking association and an indirect
                              wholly owned subsidiary of Citicorp, a Delaware
                              corporation, are the sellers of the Receivables
                              and originators of the Trust.
 
Trustee....................  Bankers Trust Company, a New York banking
                              corporation (the "Trustee").
 
Trust Assets...............  The assets of the Trust (the "Trust Assets")
                              include a portfolio of receivables (the
                              "Receivables") arising under the Accounts
                              included in the Trust from time to time, funds
                              collected or to be collected from cardholders in
                              respect of the Receivables, the right to receive
                              certain Interchange fees attributed to cardholder
                              charges for merchandise and services in the
                              Accounts, monies on deposit in certain accounts
                              of the Trust, funds collected or to be collected
                              from Participations, if any, and any Series
                              Enhancement issued with respect to a particular
                              Series (the drawing on or payment of any Series
                              Enhancement for the benefit of a Series or class
                              of investor certificates will not be available to
                              the investor certificateholders of any other
                              Series or class). The term "Series Enhancement"
                              means, with respect to any Series or class of
                              investor certificates, any letter of credit,
                              surety bond, cash collateral account, spread
                              account, guaranteed rate agreement, maturity
                              liquidity facility, tax protection agreement,
                              interest rate cap agreement, interest rate swap
                              agreement or other similar arrangement for the
                              benefit of investor certificateholders of such
                              Series or class.
 
                                       3
<PAGE>
 
 
                             The Trust Assets will be allocated among the
                              Certificateholders' Interest, the interests of
                              the investor certificateholders of other Series
                              and the Banks' Interest.
 
The Accounts...............  The Accounts will consist of the Initial Accounts
                              and any Additional Accounts but will not include
                              any Removed Accounts. The Banks have conveyed to
                              the Trust all Receivables existing on January 11,
                              1991 (the "Trust Cut-Off Date") in certain
                              revolving credit card accounts (the "Initial
                              Accounts") and all Receivables arising in the
                              Initial Accounts from time to time thereafter
                              until the termination of the Trust. Since the
                              Trust Cut-Off Date, the Banks have conveyed to
                              the Trust the Receivables in certain New Accounts
                              and the Receivables in certain other Accounts
                              included in certain Lump Sum Additions, in each
                              case in accordance with the provisions of the
                              Pooling Agreement. In addition, pursuant to the
                              Pooling Agreement, the Banks may (subject to
                              certain limitations and conditions), and in some
                              circumstances will be obligated to, designate
                              Additional Accounts the Receivables in which will
                              be included in the Trust or, in lieu thereof or
                              in addition thereto, to include Participations in
                              the Trust. Additional Accounts will consist of
                              New Accounts and accounts relating to any Lump
                              Sum Additions. The Banks will convey to the Trust
                              all Receivables in Additional Accounts, whether
                              such Receivables are then existing or thereafter
                              created. The addition to the Trust of Receivables
                              in Additional Accounts or Participations will be
                              subject to certain conditions, among others, that
                              (a) such addition will not result in a Ratings
                              Effect and (b) the Banks shall have delivered to
                              the Trustee and any provider of Series
                              Enhancement a certificate of an authorized
                              officer to the effect that, in the reasonable
                              belief of the Banks, such addition will not at
                              the time of its occurrence or at a future date
                              cause an Adverse Effect. See "Master Trust
                              Provisions--Addition of Trust Assets".
 
                             Pursuant to the Pooling Agreement, the Banks have
                              the right (subject to certain limitations and
                              conditions), but not the obligation, to remove
                              the Receivables in certain Accounts from the
                              Trust ("Removed Accounts"). See "Master Trust
                              Provisions--Removal of Accounts".
 
The Receivables............  The Receivables consist of all periodic finance
                              charges, annual membership fees, cash advance
                              fees and late charges on amounts charged for
                              merchandise and services and certain other fees
                              designated by the Banks ("Finance Charge
                              Receivables") and all amounts charged by
                              cardholders for merchandise and services, amounts
                              advanced to cardholders as cash advances and all
                              other fees billed to cardholders on the Accounts
                              ("Principal Receivables"). In addition, certain
                              Interchange attributed to cardholder charges for
                              merchandise and services in the Accounts will be
                              treated as Finance Charge Receivables. Recoveries
                              of charged-off Finance Charge Receivables will be
                              treated as collections of Finance Charge
                              Receivables and recoveries of
 
                                       4
<PAGE>
 
                              charged-off Principal Receivables will be applied
                              against charge-offs of Principal Receivables.
                              From time to time, subject to certain conditions,
                              certain of the amounts described above which are
                              included in Principal Receivables may be treated
                              as Finance Charge Receivables. The amount of
                              Receivables will fluctuate from day to day as new
                              Receivables are generated or added to the Trust
                              and as existing Receivables are collected,
                              charged-off as uncollectible or otherwise
                              adjusted. "Interchange" consists of certain fees
                              received by Citibank (South Dakota), as a credit
                              card-issuing bank, from the VISA U.S.A., Inc.
                              ("VISA") and MasterCard International
                              Incorporated ("MasterCard International")
                              associations as partial compensation for taking
                              credit risk, absorbing fraud losses and funding
                              receivables for a limited period prior to initial
                              billing.
 
The Investor                 Unless otherwise specified in the related
 Certificates..............   Prospectus Supplement, the Investor Certificates
                              will be available for purchase in minimum
                              denominations of $1,000 and integral multiples of
                              $1,000 in excess thereof, and will only be
                              available in book-entry form except in certain
                              limited circumstances as described herein under
                              "The Pooling Agreement Generally-- Definitive
                              Certificates". A portion of the Trust Assets will
                              be allocated among the Class A Certificateholders
                              of a particular Series (the "Class A Interest"),
                              the Class B Certificateholders of a particular
                              Series (the "Class B Interest"; the Class A
                              Interest and the Class B Interest of a particular
                              Series are collectively referred to herein as the
                              "Certificateholders' Interest"), the investor
                              certificateholders of other Series and the
                              interest of the Banks (the "Banks' Interest"), as
                              described below. The aggregate principal amount
                              of the Certificateholders' Interest will, except
                              as otherwise provided herein, remain fixed at the
                              aggregate initial principal amount of the
                              Investor Certificates. The Certificateholders'
                              Interest will include the right to receive (but
                              only to the extent needed to make required
                              payments under the Pooling Agreement and the
                              related Supplement and subject to any
                              reallocation of such amounts if the related
                              Supplement so provides) varying percentages of
                              collections of Finance Charge Receivables and
                              Principal Receivables and will be allocated a
                              portion of Defaulted Receivables in the Trust
                              during each Due Period. If the Investor
                              Certificates include more than one class of
                              Investor Certificates, the Trust Assets allocable
                              to the Certificateholders' Interest will be
                              further allocated among the Investor
                              Certificateholders of each class. Following the
                              occurrence of an Economic Early Amortization
                              Event and a draw under the Credit Enhancement to
                              pay principal of the Investor Certificates, a
                              portion of the Certificateholders' Interest
                              (corresponding to the aggregate amount of such
                              draw) will be allocated to the Credit Enhancer.
                              See "Master Trust Provisions--Allocations among
                              Series" and "Series Provisions--Allocations,
                              Reallocations and Subordination".
 
                             The Investor Certificates will evidence undivided
                              interests in the Trust Assets allocated to the
                              Certificateholders' Interest. The Investor
 
                                       5
<PAGE>
 
                              Certificates represent beneficial interests in
                              the Trust only and do not represent interests in
                              or obligations of Citibank, N.A., the Banks or
                              Citicorp or any affiliate thereof. Neither the
                              Investor Certificates nor the Accounts or
                              Receivables are insured or guaranteed by the
                              Federal Deposit Insurance Corporation (the
                              "FDIC") or any other governmental agency or
                              instrumentality.
 
The Banks' Interest........  The Banks' Interest represents the right to the
                              Trust Assets not allocated to either the
                              Certificateholders' Interest or the interests of
                              the investor certificateholders of any other
                              Series. The principal amount of the Banks'
                              Interest will fluctuate as the amount of the
                              Receivables held by the Trust changes from time
                              to time. The Banks intend to cause the issuance
                              of additional Series from time to time and any
                              such issuance will have the effect of decreasing
                              the Banks' Interest. See "Master Trust
                              Provisions--New Issuances". In addition, a
                              portion of the Banks' Interest may be sold
                              separately in one or more public or private
                              transactions. See "The Pooling Agreement
                              Generally--The Banks' Certificate".
 
Issuance of Additional       The Pooling Agreement authorizes the Trustee to
 Series....................   issue three types of certificates: (i) one or
                              more series of investor certificates (each, a
                              "Series"), (ii) a certificate evidencing the
                              Banks' Interest in the Trust, which is to be held
                              by the Banks and (iii) Supplemental Certificates
                              to be held by transferees of a portion of the
                              certificate evidencing the Banks' Interest in the
                              Trust. The certificate evidencing the Banks'
                              Interest in the Trust and any Supplemental
                              Certificates are collectively referred to herein
                              as the "Banks' Certificate". The Pooling
                              Agreement provides that, pursuant to any one or
                              more supplements to the Pooling Agreement (each a
                              "Supplement"), the Banks may cause the Trustee to
                              issue one or more new Series and accordingly
                              cause a reduction in the Banks' Interest
                              represented by the Banks' Certificate. Under the
                              Pooling Agreement, the Banks may define, with
                              respect to any Series, the Principal Terms of
                              such Series. See "Master Trust Provisions--New
                              Issuances". The Banks may offer any Series to the
                              public or other investors under a disclosure
                              document (a "Disclosure Document"), which may
                              consist of a Prospectus Supplement, in
                              transactions either registered under the
                              Securities Act or exempt from registration
                              thereunder, directly or through one or more
                              underwriters or placement agents, in fixed-price
                              offerings or in negotiated transactions or
                              otherwise. See "Plan of Distribution". The Banks
                              expect to offer, from time to time, additional
                              Series issued by the Trust.
 
                             It is anticipated that the investor certificates
                              of each Series will have expected final payment
                              dates and revolving periods and periods during
                              which the principal amount of such investor
                              certificates is accumulated in a principal
                              funding account or paid to holders of such
                              investor certificates as set forth in the related
                              Prospectus Supplement or other Disclosure
                              Document for such Series and which differ from
                              those for other Series, although it is expected
                              that
 
                                       6
<PAGE>
 
                              Series in a Group will have substantially similar
                              amortization events. Accordingly, it is
                              anticipated that some Series will be in their
                              revolving periods while others are in
                              accumulation periods or in amortization periods.
                              In addition, Series not included in Group One may
                              have entirely different methods for calculating
                              the amount and timing of principal distributions
                              to investor certificateholders and may utilize
                              other methods for determining the portion of
                              collections of Receivables allocable to investor
                              certificateholders. See "Master Trust
                              Provisions--New Issuances" for a discussion of
                              the possible terms for other Series.
 
                             A new Series may only be issued upon satisfaction
                              of the conditions described herein under "Master
                              Trust Provisions--New Issuances" including, among
                              others, that (a) such issuance will not result in
                              a Ratings Effect and (b) the Banks shall have
                              delivered to the Trustee and any provider of
                              Series Enhancement a certificate of an authorized
                              officer to the effect that, in the reasonable
                              belief of the Banks, such issuance will not at
                              the time of its occurrence or at a future date
                              cause an Adverse Effect.
 
Allocations Among Series...  Pursuant to the Pooling Agreement, during each Due
                              Period, the Servicer is required to allocate to
                              each Series collections of Principal Receivables
                              and Finance Charge Receivables and the amount of
                              Defaulted Receivables with respect to such Due
                              Period pro rata based on the initial principal
                              amount of the investor certificates of such
                              Series (or, if applicable with respect to a
                              particular Series, the highest invested amount
                              during a Due Period or, during any accumulation
                              period, scheduled amortization period, early
                              amortization period or class A amortization
                              period, the highest invested amount during the
                              Due Period preceding the first Due Period with
                              respect to such accumulation period, scheduled
                              amortization period, early amortization period,
                              or class A amortization period) less unreimbursed
                              investor charge-offs. See "Master Trust
                              Provisions--Allocations among Series". Such
                              amounts allocated to each Series are then further
                              allocated within each Series among the investor
                              certificates of such Series and the Banks
                              pursuant to the terms of the related Supplement.
 
Reallocations Among Series
 in a Group................
                             If specified in the related Prospectus Supplement,
                              the investor certificates of a Series may be
                              included in Group One ("Group One") or a group of
                              Series similar to Group One (each, a "Group").
                              Series included in any Group issued by the Trust
                              may be subject to reallocations of collections of
                              Receivables and other amounts or obligations
                              among the Series in the Group in the manner and
                              to the extent described in the Supplements
                              relating to the Series in the Group. See the
                              "Summary of Series Terms" in the related
                              Prospectus Supplement and "Series Provisions--
                              Allocations, Reallocations and Subordination--
                              Reallocations Among Investor Certificates of
                              Different Series" to determine
 
                                       7
<PAGE>
 
                              whether the Series of Investor Certificates
                              offered hereby is part of a Group and the manner
                              and extent of any reallocation among Series
                              included in such Group. See also "Special
                              Considerations--Master Trust Considerations--
                              Issuance of Additional Series".
 
Interest...................  Interest will accrue on the unpaid principal
                              amount of the Investor Certificates at the per
                              annum rate either specified in or determined in
                              the manner specified in the related Prospectus
                              Supplement. Except as otherwise provided herein
                              or in the related Prospectus Supplement,
                              collections of Finance Charge Receivables and
                              certain other amounts allocable to the
                              Certificateholders' Interest will be used to make
                              interest payments to Investor Certificateholders
                              on each Interest Payment Date, provided that if
                              an Early Amortization Period commences,
                              thereafter interest will be distributed to
                              Investor Certificateholders monthly on each
                              Special Payment Date. If the Interest Payment
                              Dates for a Series or class occur less frequently
                              than monthly, such collections or other amounts
                              (or the portion thereof allocable to such class)
                              will be deposited in one or more trust accounts
                              (each, an "Interest Funding Account") and used to
                              make interest payments to Investor
                              Certificateholders on the following Interest
                              Payment Date. If a Series has more than one class
                              of investor certificates, each such class may
                              have a separate Interest Funding Account.
                              Interest for any Interest Payment Date will
                              accrue from and including the preceding Interest
                              Payment Date (or, in the case of the first
                              Interest Payment Date, from and including the
                              Series Issuance Date) to but excluding such
                              Interest Payment Date and will be calculated on
                              the basis set forth in the related Prospectus
                              Supplement. Interest for any Payment Date due but
                              not paid on such Payment Date will be due on the
                              next succeeding Distribution Date together with
                              additional interest on such amount at the
                              applicable certificate rate. See "Series
                              Provisions--Interest" and "--Distributions".
 
Principal..................  It is expected that the final principal payment
                              with respect to each Investor Certificate will be
                              made on the applicable Expected Final Payment
                              Date, unless otherwise specified in the related
                              Prospectus Supplement. If a Series has more than
                              one class of investor certificates, a different
                              expected final payment date may be assigned to
                              each class. The final principal payment with
                              respect to the Investor Certificates may be paid
                              earlier than the applicable Expected Final
                              Payment Date if an Early Amortization Event
                              occurs or if the terms of the Series so provide,
                              or later under certain circumstances described
                              herein. See "Special Considerations--Series
                              Considerations--Payments" for a description of
                              factors that may affect the timing of principal
                              payments on the Investor Certificates.
 
Revolving Period...........  The Investor Certificates will have a revolving
                              period (the "Revolving Period"), which will
                              commence at the close of business on the Series
                              Cut-Off Date specified in the related
 
                                       8
<PAGE>
 
                              Prospectus Supplement ("Series Cut-Off Date") and
                              continue until the earlier of (a) the
                              commencement of an Early Amortization Period and
                              (b) the date specified in the related Prospectus
                              Supplement as the end of the Revolving Period or,
                              subject to certain conditions, such other date as
                              the Servicer may elect. During the Revolving
                              Period, collections of Principal Receivables and
                              certain other amounts otherwise allocable to the
                              Certificateholders' Interest will generally be
                              reinvested in the Trust or otherwise used to
                              maintain the Certificateholders' Interest, but
                              may be used to amortize other Series of
                              Certificates, as specified in the related
                              Prospectus Supplement. See "Series Provisions--
                              Principal" and "--Allocations, Reallocations and
                              Subordination" and see also "Series Provisions--
                              Early Amortization Events" for a discussion of
                              the events which might lead to the termination of
                              the Revolving Period prior to its scheduled
                              ending date.
 
Accumulation Period........  Unless the related Prospectus Supplement specifies
                              otherwise or unless an Early Amortization Period
                              commences, the Investor Certificates will have an
                              accumulation period (the "Accumulation Period"),
                              which will commence at the close of business on
                              the date specified in the related Prospectus
                              Supplement or, subject to certain conditions,
                              such other date as the Servicer may elect and
                              continue until the earliest of (a) the
                              commencement of an Early Amortization Period, (b)
                              payment in full of the Invested Amount of the
                              Investor Certificates and (c) the Series
                              Termination Date specified in the related
                              Prospectus Supplement. During the Accumulation
                              Period, until the Invested Amount of the Class A
                              Certificates has been paid in full, collections
                              of Principal Receivables and certain other
                              amounts allocable to the Certificateholders'
                              Interest will be deposited on each Distribution
                              Date in a trust account (the "Class A Principal
                              Funding Account") and used to make principal
                              distributions to the Class A Certificateholders
                              when due. The amount to be deposited in the Class
                              A Principal Funding Account on any Distribution
                              Date may be limited to an amount (the "Controlled
                              Distribution Amount") equal to the Controlled
                              Amortization Amount specified in the related
                              Prospectus Supplement plus any existing deficit
                              controlled amortization amount arising from prior
                              Distribution Dates. On the Class B Expected Final
                              Payment Date, provided that the Class A Invested
                              Amount is paid in full on the Class A Expected
                              Final Payment Date and an Early Amortization
                              Period has not commenced, such collections of
                              Principal Receivables and other amounts allocable
                              to the Certificateholders' Interest will be used
                              to pay the Class B Invested Amount as described
                              under "Series Provisions--Allocations,
                              Reallocations and Subordination--Reallocations
                              Among Investor Certificates of Different Series--
                              Investor Principal Collections for all Series".
                              Unless otherwise specified in the related
                              Prospectus Supplement, it is not expected that
                              the Class B Certificates will have a separate
                              principal funding account. See "Series
                              Provisions-- Principal", "--Principal Funding
                              Account" and
 
                                       9
<PAGE>
 
                              "--Distributions" for a more complete description
                              of the conditions under which amounts will be
                              accumulated in and distributed from the Class A
                              Principal Funding Account.
 
Early Amortization           During the period from the day on which an Early
 Period....................   Amortization Event has occurred to the date on
                              which the Invested Amount of the Investor
                              Certificates and the Enhancement Invested Amount,
                              if any, have been paid in full or the Series
                              Termination Date specified in the related
                              Prospectus Supplement has occurred (the "Early
                              Amortization Period"), amounts allocable to the
                              Certificateholders' Interest and, if the Early
                              Amortization Event applies to other Series, to
                              the investor certificateholders of such other
                              Series that would otherwise be reinvested in the
                              Trust or otherwise used to maintain the
                              certificateholders' interest with respect to any
                              Series or accumulated in a principal funding
                              account, will instead be distributed as principal
                              payments to the applicable investor
                              certificateholders monthly on each Distribution
                              Date beginning with the first Special Payment
                              Date. During an Early Amortization Period,
                              distributions of principal to Investor
                              Certificateholders will not be subject to any
                              Controlled Distribution Amount. In addition, upon
                              the commencement of the Early Amortization
                              Period, any funds on deposit in the Class A
                              Principal Funding Account or the Class A Interest
                              Funding Account will be paid to the Class A
                              Certificateholders, and any funds on deposit in
                              the Class B Interest Funding Account will be paid
                              to the Class B Certificateholders, in each case
                              on the first Special Payment Date. Moreover, on
                              the first Special Payment Date following an
                              Economic Early Amortization Event, principal
                              payments will be made to the Class A
                              Certificateholders and the Class B
                              Certificateholders from a draw under the Credit
                              Enhancement as described under "Series
                              Provisions--Series Enhancements--Credit
                              Enhancement Generally". See "Series Provisions--
                              Early Amortization Events" and the related
                              Prospectus Supplement for a discussion of the
                              events which might lead to the commencement of
                              the Early Amortization Period.
 
Reallocations of Principal
 and Subordination.........
                             Unless otherwise specified in the related
                              Prospectus Supplement, no Series will be
                              subordinated to any other Series, although a
                              Series may be part of a Group as described above
                              under "Reallocations Among Series in a Group". To
                              the extent that collections of Principal
                              Receivables and other amounts that are allocated
                              to the Certificateholders' Interest for the
                              Series offered hereby are available to be
                              reinvested in the Trust, they may be applied to
                              cover principal payments due to or for the
                              benefit of investor certificateholders of another
                              Series. Any such reallocation will not result in
                              a reduction in the Certificateholders' Interest.
                              In addition, collections of Principal Receivables
                              and certain other amounts otherwise allocable to
                              other Series, to the extent such collections are
                              available to be reinvested in the Trust, may be
                              applied to cover
 
                                       10
<PAGE>
 
                              principal payments due to or for the benefit of
                              the Investor Certificateholders. See "Series
                              Provisions--Allocations, Reallocations and
                              Subordination--Reallocations Among Investor
                              Certificates of Different Series--Investor
                              Principal Collections for all Series".
 
                             If a Series has more than one class of investor
                              certificates, the related Prospectus Supplement
                              may specify that one class will be subordinated
                              to another class within such Series. The extent
                              and manner of any such subordination will be
                              specified in the related Supplement and described
                              in the related Prospectus Supplement. See "Series
                              Provisions--Allocations, Reallocations and
                              Subordination--Allocations, Reallocations and
                              Subordination Within a Series--Subordination".
 
Servicing..................  The Servicer (initially, Citibank (South Dakota))
                              will be responsible for servicing, managing and
                              making collections on the Receivables. Subject to
                              certain limitations, the Servicer will use for
                              its own benefit and not segregate collections of
                              Receivables received by it during the monthly
                              period beginning at the close of business on the
                              fourth-to-last business day of each month and
                              ending at the close of business on the fourth-to-
                              last business day of the immediately following
                              month (each, a "Due Period") until not later than
                              12:00 noon, New York City time, on the seventh
                              day of the following month (or such other day as
                              is specified in the Prospectus Supplement) or, if
                              such day is not a business day, the next
                              succeeding business day (each, a "Distribution
                              Date"). On or about the earlier of the fifth
                              business day and the eighth calendar day
                              preceding the seventh day of the following month
                              (each, a "Determination Date"), the Servicer will
                              calculate the amounts to be allocated to the
                              Investor Certificateholders, holders of investor
                              certificates of any other Series and the Banks as
                              described herein in respect of collections of
                              Receivables received with respect to the related
                              Due Period. On each Distribution Date with
                              respect to a Series, the Servicer will deposit
                              all collections with respect to such Series into
                              the Collection Account, net of any amounts
                              permitted to be deducted by the Servicer as
                              described under "Master Trust Provisions--
                              Deposits in Collection Account". See "Special
                              Considerations--Master Trust Considerations--
                              Certain Legal Aspects". In certain limited
                              circumstances Citibank (South Dakota) may resign
                              or be removed as Servicer, in which event either
                              the Trustee or, so long as it meets certain
                              eligibility standards set forth in the Pooling
                              Agreement, a third-party servicer may be
                              appointed as successor servicer. (Citibank (South
                              Dakota) or any such successor servicer is
                              referred to herein as the "Servicer".) Citibank
                              (South Dakota) is permitted to delegate any of
                              its duties as Servicer to any of its affiliates,
                              but any such delegation will not relieve the
                              Servicer of its obligations under the Pooling
                              Agreement or any Supplement. The Servicer will
                              receive the Series Servicing Fee, any servicing
                              fees payable with respect to any other Series and
 
                                       11
<PAGE>
 
                              certain other amounts as described herein as
                              servicing compensation from the Trust. See
                              "Series Provisions--Servicing Compensation and
                              Payment of Expenses".
 
Mandatory Reassignment and
 Transfer of Certain
 Receivables...............
                             As of the Series Issuance Date, the Banks will
                              jointly and severally make certain
                              representations and warranties in the Pooling
                              Agreement with respect to the Accounts and the
                              Receivables in their capacity as sellers and
                              Citibank (South Dakota) will make certain
                              representations and warranties in the Pooling
                              Agreement in its capacity as Servicer. If the
                              Banks breach certain of their representations and
                              warranties with respect to any Receivable and
                              such breach remains uncured for a specified
                              period after the Banks become aware or receive
                              notice thereof from the Trustee and such breach
                              has a materially adverse effect on the
                              certificateholders' interest of all Series
                              therein, the certificateholders' interest of all
                              Series in all Receivables with respect to the
                              affected Account will be reassigned to the Banks.
                              If the Servicer fails to comply in all material
                              respects with certain covenants or warranties
                              with respect to any Receivable and such
                              noncompliance is not cured within a specified
                              period after the Servicer becomes aware or
                              receives notice thereof from the Trustee and such
                              noncompliance has a materially adverse effect on
                              the certificateholders' interest of all Series
                              therein, the certificateholders' interest of all
                              Series in all Receivables with respect to the
                              affected Account will be assigned to the
                              Servicer. In the event of a transfer of servicing
                              obligations to a successor servicer, such
                              successor servicer, rather than Citibank (South
                              Dakota), would be responsible for any failure to
                              comply with the Servicer's covenants and
                              warranties arising thereafter.
 
Tax Status.................  In the opinion of special tax counsel for the
                              Banks and the Trust, the Investor Certificates
                              are properly characterized as debt for federal
                              income tax purposes and for South Dakota tax
                              purposes. Each Investor Certificateholder, by the
                              acceptance of an Investor Certificate, will agree
                              to treat the Investor Certificates as
                              indebtedness of the Banks for federal, state and
                              local income and franchise tax purposes. See "Tax
                              Matters" for additional information concerning
                              the application of federal and South Dakota tax
                              laws.
 
Income Tax Withholding.....  Interest and original issue discount ("OID") on
                              the Investor Certificates held by non-U.S.
                              persons will be subject to United States
                              withholding tax unless the holder complies with
                              applicable IRS identification requirements.
                              Interest on the Investor Certificates held by
                              U.S. persons will be subject to backup
                              withholding unless the holder complies with
                              applicable IRS identification requirements.
 
                                       12
<PAGE>
 
                            SPECIAL CONSIDERATIONS
 
SERIES CONSIDERATIONS
 
  Secondary Market Trading. Certain financial institutions currently make a
market in credit card participation certificates similar to the Investor
Certificates previously issued by the Trust and by other trusts originated by
the Banks. It is anticipated that, to the extent permitted, the underwriters
of the Investor Certificates offered hereby will make a market in such
certificates in Europe, Japan and the United States, but in no event will any
such underwriter be under an obligation to do so. There can be no assurance
that a secondary market will develop or, if a secondary market does develop,
that it will provide Investor Certificateholders with liquidity of investment
or that it will continue for the life of the Investor Certificates.
 
  Payments. The Receivables may be paid at any time and there is no assurance
that there will be new Receivables created in the Accounts, that Receivables
will be added to the Trust or that any particular pattern of cardholder
repayments will occur. The full payment of the Invested Amount of a class of
Investor Certificates on the expected date specified in the related Prospectus
Supplement (the "Expected Final Payment Date") is primarily dependent on the
rate of cardholder repayments and will not be made if such repayment amounts
are insufficient to pay such Invested Amount in full. No assurance can be
given as to the cardholder monthly payment rates which will actually occur in
any future period. The actual rate of accumulation of principal in a Principal
Funding Account and the amount of Available Investor Principal Collections on
any Distribution Date will depend on, among other factors, the rate of
repayment, the timing of the receipt of repayments and the rate of default by
cardholders and, as a result, no assurance can be given that the Invested
Amount of a class of Investor Certificates will be paid on its respective
Expected Final Payment Date.
 
  In addition, while Subordinated Principal Collections are available to fund
the Required Amount, the Class B Invested Amount is, and therefore such
Subordinated Principal Collections are, limited and, under certain
circumstances, the Class B Invested Amount will be decreased as described
herein. If the Class B Invested Amount suffers such a reduction, the portion
of collections of Finance Charge Receivables allocated to the Class B
Certificates in future Due Periods will be reduced and principal and interest
payments on the Class B Certificates may be delayed or reduced.
 
  The Pooling Agreement provides that the Banks will be required to make a
Lump Sum Addition to the Trust in the event that the amount of Principal
Receivables is not maintained at a minimum level equal to the greater of (a)
107% of the sum of the invested amounts of all outstanding investor
certificates of all Series and (b) 102% of the sum of the initial invested
amounts of all outstanding investor certificates of all Series (or, if
applicable with respect to a particular Series, the highest invested amount
during a Due Period, or, during any accumulation period, scheduled
amortization period, early amortization period or class A amortization period,
the highest invested amount during the Due Period preceding the first Due
Period with respect to such accumulation period, scheduled amortization
period, early amortization period or class A amortization period) (the
"Required Minimum Principal Balance"). The Required Minimum Principal Balance
may be reduced under certain circumstances described herein under "Master
Trust Provisions--Addition of Trust Assets". In the event that the Banks fail
to make a Lump Sum Addition within five business days of the day on which they
are required to make such Lump Sum Addition pursuant to the Pooling Agreement,
unless the Required Minimum Principal Balance has been reduced, an Early
Amortization Event will occur. In addition, an early amortization event would
also occur with respect to all other Series.
 
  A decrease in the effective yield on the Receivables due to, among other
things, a change in the periodic finance charges applicable to the Accounts,
an increase in the level of delinquencies or increased convenience use, when
cardholders pay their Receivables early and thus avoid all finance charges on
purchases, could cause an Early Amortization Event to occur as well as result
in decreased protection to Investor Certificateholders against defaults under
the Accounts. If the amount of Surplus Finance Charge Collections averaged
over a period of three consecutive Due Periods is less than or equal to a
specified amount (the "Required Surplus Finance Charge Amount") for the last
of such three consecutive Due Periods, an Early Amortization Event will occur.
The Required Surplus Finance Charge Amount will initially be, and cannot be
less than, zero, although pursuant
 
                                      13
<PAGE>
 
to the Series Supplement the Banks will be permitted to change the Required
Surplus Finance Charge Amount; provided, however, that in the case of an
increase in such amount, such increase will not, in the reasonable belief of
the Banks, at the time of such increase or at a future date cause an Adverse
Effect. Although a change in the Required Surplus Finance Charge Amount would
not cause an Early Amortization Event at the time of such change, any increase
in such amount would make the occurrence of an Early Amortization Event more
likely. "Surplus Finance Charge Collections" means, with respect to any Due
Period, the amount of (a) Reallocated Investor Finance Charges for such Due
Period, plus (b) the amount of any payment received by the Trustee pursuant to
any interest rate cap agreement or interest rate swap agreement for such Due
Period (but excluding from such payments the amount of any Class A Funding
Account Receipt received by the Trust), minus (c) without duplication, the
amount of distributions required to be made with respect to such Due Period as
described under "Series Provisions--Allocations, Reallocations and
Subordination-- Allocations, Reallocations and Subordination Within a Series--
Class A and Class B Investor Finance Charges" and "--Excess Finance Charge
Collections" (excluding any Class A Funding Account Shortfall, Class A Funding
Account Payment and the amounts described in clauses (i) and (j) of "Excess
Finance Charge Collections"). See "Series Provisions--Early Amortization
Events" for a discussion of other events which might lead to the commencement
of an Early Amortization Period. If an Insolvency Event relating to either of
the Banks occurs, unless each other holder of the Banks' Certificate and
investor certificateholders holding investor certificates of each Series or
each class of each Series evidencing more than 50% of the aggregate unpaid
principal amount of each such Series or class (and, in the case of certain
Series, any credit enhancer with respect thereto) thereafter instruct the
Trustee not to sell the Receivables, the Receivables will be promptly sold or
otherwise liquidated (subject to any restrictions imposed by the FDIC
described below under "--Master Trust Considerations--Certain Legal Aspects").
The proceeds from the sale of the Receivables will be treated as collections
on the Receivables and allocated accordingly among holders of investor
certificates of all Series and the Banks. The portion of such proceeds
allocable to pay principal to the Certificateholders' Interest will be applied
first to pay the Class A Invested Amount in full. If such portion is
insufficient to pay the entire Class A Invested Amount, the amount of
principal returned to the Class A Certificateholders will be reduced and the
Class A Certificateholders will incur a loss and no principal will be
available to pay the Class B Certificateholders who will also incur a loss.
Upon the occurrence of an Insolvency Event, if no Early Amortization Event
other than such Insolvency Event exists, the FDIC may have the power to
continue to require the Banks to transfer new Principal Receivables to the
Trust and prevent the early sale, liquidation or disposition of the
Receivables and the commencement of an Early Amortization Period. See "--
Master Trust Considerations--Certain Legal Aspects" below.
 
  Effect of Subordination. Except as described in the following sentence, the
Class B Certificates are subordinated in right of payment of principal to the
Class A Certificates. Payments of principal in respect of the Class B
Certificates will not commence until after the final payment with respect to
the Class A Invested Amount has been made as described herein and in the
related Prospectus Supplement, except that following the occurrence of an
Economic Early Amortization Event principal of the Class B Certificates will
be payable from amounts available to be drawn under the Credit Enhancement as
described in the related Prospectus Supplement and under "Series Provisions--
Series Enhancements--Credit Enhancement Generally" herein. Moreover, the Class
B Invested Amount is subject to reduction if the Required Amount for any Due
Period is greater than zero and is not funded either from Excess Finance
Charge Collections or from a draw under the Credit Enhancement (except that if
the Enhancement Invested Amount at such time is greater than zero, the
Enhancement Invested Amount will be reduced prior to any reduction in the
Class B Invested Amount). If the Class B Invested Amount suffers such a
reduction, the portion of collections of Finance Charge Receivables allocable
to the Class B Certificateholders in future Due Periods will be reduced and
principal and interest payments on the Class B Certificates may be delayed or
reduced. See "Series Provisions--Allocations, Reallocations and
Subordination--Allocations, Reallocations and Subordination Within a Series--
Subordination". In addition, in the event of a sale of the Receivables due to
an Insolvency Event or a sale or repurchase of the Certificateholders'
Interest in the event of a Servicer Default, the portion of the net proceeds
of such sale allocable to pay principal of the Certificateholders' Interest
will first be used to pay amounts due to the Class A Certificateholders and
any remainder will be used to pay amounts due to Class B Certificateholders,
thereby causing a loss to Class B Certificateholders if such portion plus any
amount available to be drawn under the Credit Enhancement are
 
                                      14
<PAGE>
 
insufficient to pay the Class B Certificateholders in full. See "Series
Provisions--Early Amortization Events", "--Series Enhancements--Credit
Enhancement Generally", "The Pooling Agreement Generally--Servicer Default"
and "Certain Legal Aspects of the Receivables--Certain Matters Relating to
Receivership". If the Class B Invested Amount is reduced to zero, the Class A
Certificateholders will bear directly the credit and other risks associated
with their undivided interest in the Trust.
 
  Control. Subject to certain limited exceptions, Investor Certificateholders
holding a specified percentage of the aggregate outstanding principal amount
of the Investor Certificates may take certain actions, or direct certain
actions to be taken, under the Pooling Agreement or the Series Supplement,
including directing the Trustee to take certain actions, amending the Series
Supplement and declaring certain Early Amortization Events and Servicer
Defaults. In such cases (subject to certain exceptions), when determining
whether the required percentage of Investor Certificateholders have given
their approval or consent, the Class A Certificateholders and the Class B
Certificateholders will be treated as a single class. Accordingly, the Class A
Certificateholders will have the power to determine whether any such action is
taken without regard to the position or the interests of the Class B
Certificateholders relating to such action. The Class B Certificateholders
will not have similar power. In order to make such determinations, the Class B
Certificateholders will need the approval or consent of Class A
Certificateholders owning a substantial portion of the Class A Interest. See
also "--Master Trust Considerations--Control".
 
  Basis Risk. A substantial portion of the Receivables bear interest at the
prime rate plus a margin, while the Investor Certificates will bear interest
at one or more fixed or floating rates specified in the related Prospectus
Supplement. If there is a decline in the prime rate, the amount of Reallocated
Investor Finance Charges may be reduced and, even if there is a similar
reduction in any floating rate or rates applicable to the Investor
Certificates, there will not be a similar reduction in the other amounts
required to be funded out of such Reallocated Investor Finance Charges
(including any fixed interest rate applicable to the Investor Certificates) as
described under "Series Provisions--Allocations, Reallocations and
Subordination--Allocations, Reallocations and Subordination Within a Series--
Class A and Class B Investor Finance Charges".
 
  Ratings of the Investor Certificates. Unless otherwise specified in the
related Prospectus Supplement, it is a condition to issuance of the Class A
Certificates that they be rated in the highest rating category by at least one
nationally recognized rating agency (the rating agency or rating agencies
designated by the Banks in the Series Supplement in respect of the Investor
Certificates and in the related Supplement in respect of any other outstanding
Series of investor certificates are referred to hereinafter as the "Rating
Agency"). Unless otherwise specified in the related Prospectus Supplement, it
is a condition to issuance of the Class B Certificates that they be rated at
least "A" or its equivalent by at least one Rating Agency. The rating of the
Class A Certificates is based primarily on the value of the Receivables, the
extent of the Initial Shared Enhancement Amount, the circumstances in which
funds may be drawn under the Credit Enhancement for the benefit of the
Investor Certificateholders, the terms of the Class B Certificates, the terms
of any other applicable Series Enhancement described in the related Prospectus
Supplement and, in certain cases, the credit rating of the provider of the
Credit Enhancement or such other Series Enhancement. The rating of the Class B
Certificates is based primarily on the value of the Receivables, the extent of
the Initial Enhancement Amount, the circumstances in which funds may be drawn
under the Credit Enhancement for the benefit of the Investor
Certificateholders, the terms of any other applicable Series Enhancement
described in the related Prospectus Supplement, the credit ratings of the
Servicer and the Banks and, in certain cases, the credit rating of the
provider of the Credit Enhancement or such other Series Enhancement.
 
  The ratings of the Investor Certificates are not a recommendation to
purchase, hold or sell the Investor Certificates, inasmuch as such ratings do
not comment as to market price or suitability for a particular investor. There
is no assurance that the ratings of the Investor Certificates will remain for
any given period of time or that such ratings will not be lowered or withdrawn
entirely by the Rating Agency if in its judgment circumstances in the future
so warrant. The ratings of the Investor Certificates do not address the
possibility of the imposition of United States withholding tax with respect to
non-U.S. persons. Although the ratings of the Class A Certificates
 
                                      15
<PAGE>
 
and the Class B Certificates address the respective likelihood of the ultimate
payment of principal and interest on the Class A Certificates and the Class B
Certificates, the Rating Agency does not evaluate, and such ratings do not
address, the likelihood that the outstanding principal amount of a class of
Investor Certificates will be paid by its respective Expected Final Payment
Date. The ratings also do not address the possibility of the occurrence of an
Early Amortization Event, which could result in the payment of the outstanding
principal amount of a class of Investor Certificates prior to its respective
Expected Final Payment Date.
 
  Book-Entry Registration. The Investor Certificates offered hereby will be
initially represented by one or more Class A Certificates and, if offered by
this Prospectus and the accompanying Prospectus Supplement, one or more Class
B Certificates registered in the name of Cede, the nominee for DTC, and will
not be registered in the names of the Class A Certificateholders, the Class B
Certificateholders (if Class B Certificates are offered hereby) or their
nominees. Consequently, unless and until Definitive Certificates are issued,
Class A Certificateholders and Class B Certificateholders (if Class B
Certificates are offered hereby) will not be recognized by the Trustee as
"Class A Certificateholders" or "Class B Certificateholders," respectively (as
such terms are used in the Pooling Agreement and the Series Supplement).
Hence, until such time, such Investor Certificateholders will only be able to
exercise the rights of Investor Certificateholders indirectly through DTC,
Cedel or Euroclear and their respective participating organizations. See "The
Pooling Agreement Generally--Book-Entry Registration" and "--Definitive
Certificates".
 
MASTER TRUST CONSIDERATIONS
 
  Issuance of Additional Series. The Trust, as a master trust, previously has
issued other Series of investor certificates and is expected to issue
additional Series from time to time. While the terms of any Series will be
specified in a Supplement, the provisions of a Supplement and, therefore, the
terms of any additional Series, will not be subject to the prior review by, or
consent of, holders of the investor certificates of any previously issued
Series. Such terms may include methods for determining applicable investor
percentages and allocating collections, provisions creating different or
additional security or other Series Enhancements, provisions subordinating
such Series to another Series or other Series (if the Supplement relating to
such Series so permits) to such Series, and any other amendment or supplement
to the Pooling Agreement which is made applicable only to such Series. The
obligation of the Trustee to issue any new Series is subject to the following
conditions, among others: (a) such issuance will not result in any Rating
Agency reducing or withdrawing its rating of the investor certificates of any
outstanding Series (any such reduction or withdrawal is referred to herein as
a "Ratings Effect") and (b) the Banks shall have delivered to the Trustee and
any provider of Series Enhancement a certificate of an authorized officer to
the effect that, in the reasonable belief of the Banks, such issuance will not
(i) at the time of its occurrence or at a future date, cause the occurrence of
an early amortization event with respect to any Series or, in the case of
Group One, a reduction of the amount of surplus finance charge collections
with respect to such Series averaged over any three consecutive Due Periods to
be less than the sum of (A) the required surplus finance charge amount with
respect to such Series for the last of such Due Periods and (B) an amount
equal to one-twelfth of 1% of the invested amount with respect to such Series
as of the last day of the last of such Due Periods or (ii) adversely affect in
any manner the timing or amount of payments to investor certificateholders of
any Series or with respect to the Enhancement Invested Amount, if any (any of
the conditions referred to in the preceding clauses (i) and (ii) are referred
to herein as an "Adverse Effect"). There can be no assurance, however, that
the terms of any other Series, including any Series issued from time to time
hereafter, might not have an impact on the timing or amount of payments
received by an Investor Certificateholder. In addition, the Supplements
relating to Series which are part of a Group as described herein may provide
that collections of Receivables allocable to such Series will be reallocated
among all Series in the Group. Consequently, the issuance of new Series in a
Group may have the effect of reducing the amount of collections of Receivables
which are reallocated to the investor certificates of existing Series in such
Group. For example, in Group One, which provides for the reallocation of
collections of Finance Charge Receivables allocable to a Series among all
Series in such Group, an additional Series which is issued with a larger claim
with respect to monthly interest than that of previously issued Series in
Group One (due to a higher certificate rate) will receive a proportionately
larger reallocation of Group One Investor Finance Charges. Such issuance
 
                                      16
<PAGE>
 
will reduce the amount of Group One Investor Finance Charges which are
reallocated to the existing Series in Group One. See "Master Trust
Provisions--New Issuances".
 
  Addition of Trust Assets. The Banks may, and in some cases will be obligated
to, designate Additional Accounts, the Receivables in which will be conveyed
to the Trust. Additional Accounts will be subject to different eligibility
criteria than the Initial Accounts. See "The Pooling Agreement Generally--
Representations and Warranties". Such Additional Accounts may include accounts
originated using criteria different from those which were applied to the
Initial Accounts because such accounts were originated at a later date or were
part of a portfolio of credit card accounts which were not part of the
portfolio of VISA* and MasterCard* credit card accounts owned by Citibank
(South Dakota) (the "Portfolio") or which were acquired from another credit
card issuer. Moreover, Additional Accounts may not be accounts of the same
type previously included in the Trust. Consequently, there can be no assurance
that such Additional Accounts will be of the same credit quality as the
Initial Accounts or the Additional Accounts currently included in the Trust.
In addition, such Additional Accounts may consist of credit card accounts
which have different terms than the Initial Accounts and the Additional
Accounts currently included in the Trust, including lower periodic finance
charges, which may have the effect of reducing the average yield on the
portfolio of Accounts. The designation of Additional Accounts will be subject
to the satisfaction of certain conditions described herein under "Master Trust
Provisions--Addition of Trust Assets", including that (a) such addition will
not result in a Ratings Effect and (b) the Banks shall have delivered to the
Trustee and any provider of Series Enhancement a certificate of an authorized
officer to the effect that, in the reasonable belief of the Banks, such
addition will not at the time of such addition or at a future date cause an
Adverse Effect. See "Master Trust Provisions--Addition of Trust Assets".
 
  Certain Legal Aspects. While the Banks have sold and will sell Receivables
to the Trust, a court could treat such a transaction as an assignment of
collateral as security for the benefit of the investor certificateholders of
the outstanding Series. The Banks warrant in the Pooling Agreement that the
transfer of the Receivables to the Trust is either a sale of the Receivables
to the Trust or the grant to the Trust of a security interest in the
Receivables. The Banks will take all actions that are required under
applicable state law to perfect the Trust's interest in the Receivables and,
in the Pooling Agreement, the Banks have warranted that, if the transfer by
the Banks to the Trust is a grant to the Trust of a security interest in the
Receivables, the Trust will at all times have a first priority perfected
security interest therein and, with certain exceptions, in proceeds thereof.
Nevertheless, if the transfer of the Receivables to the Trust is deemed to
create a security interest therein under the South Dakota or Nevada Uniform
Commercial Code (the "UCC"), a tax or government lien on property of the Banks
arising before Receivables come into existence may have priority over the
Trust's interest in such Receivables and, if the FDIC were appointed receiver
of either of the Banks, the receiver's administrative expenses may also have
priority over the Trust's interest in such Receivables. In addition, while
Citibank (South Dakota) is the Servicer, cash collections held by Citibank
(South Dakota) may, subject to certain conditions, be commingled and used for
the benefit of Citibank (South Dakota) prior to each Distribution Date and, in
the event of the insolvency or receivership of Citibank (South Dakota) or, in
certain circumstances, the lapse of certain time periods, the Trust may not
have a perfected interest in such collections. Unless otherwise agreed to by
the applicable Rating Agency, if the certificate of deposit rating of Citibank
(South Dakota) is reduced below A-1 or P-1 by the applicable Rating Agency,
Citibank (South Dakota) will, within five business days, commence the deposit
of collections directly into the Collection Account within two business days
of the day of processing, and the Collection Account will be moved from
Citibank (South Dakota).
 
  If the FDIC were appointed receiver of either of the Banks or if certain
other events relating to the bankruptcy, insolvency or receivership of either
of the Banks were to occur (an "Insolvency Event"), then an Early Amortization
Event would occur and, pursuant to the terms of the Pooling Agreement, new
Principal Receivables would not be transferred to the Trust and the Trustee
would sell the Receivables (unless each other holder of the Banks' Certificate
and investor certificateholders holding investor certificates of each Series
or each class of each Series evidencing more than 50% of the aggregate unpaid
principal amount of each such Series or
- --------
* VISA and MasterCard are registered trademarks of VISA U.S.A., Inc. and
  MasterCard International Incorporated, respectively.
 
                                      17
<PAGE>
 
class (and in the case of certain Series, any credit enhancer with respect
thereto) instruct otherwise), thereby causing early termination of the Trust
and a loss to investor certificateholders if the net proceeds of such sale
allocable to the investor certificateholders of all Series were insufficient
to pay such investor certificateholders in full. To the extent the Banks grant
a security interest in the Receivables to the Trust, and such security
interest is validly perfected before the occurrence of an Insolvency Event and
was not taken in contemplation of insolvency or with the intent to hinder,
delay or defraud the relevant Bank or its creditors, based upon opinions
issued by the general counsel of the FDIC addressing the enforceability
against the FDIC, as conservator or receiver for a depository institution, of
a security interest in collateral granted by such depository institution, such
security interest should not be subject to avoidance, and payments to the
Trust with respect to the Receivables should not be subject to recovery, by
the FDIC. If, however, the FDIC were to assert a contrary position, certain
provisions of the FDIA which, at the request of the FDIC, have been applied in
lawsuits to avoid security interests in collateral granted by depository
institutions, would permit the FDIC to avoid such security interest, thereby
resulting in possible delays and reductions in payments to the investor
certificateholders of all outstanding Series. In addition, federal law
governing receiverships of federally-insured depository institutions could be
interpreted to require compliance with certain claims procedures if a receiver
were appointed for either of the Banks before the Trustee could collect, sell,
dispose of or otherwise liquidate the Receivables, which could delay or
possibly reduce payments on the investor certificates of all outstanding
Series. Upon the occurrence of an Insolvency Event, if no Early Amortization
Event other than such Insolvency Event exists, the FDIC may have the power to
continue to require the Banks to transfer new Principal Receivables to the
Trust and to prevent the early sale, liquidation or disposition of the
Receivables and the commencement of an Early Amortization Period. In the event
of a Servicer Default, if a conservator, receiver or liquidator is appointed
for the Servicer, and no Servicer Default other than such conservatorship,
receivership, liquidation or insolvency of the Servicer exists, the
conservator, receiver or liquidator may have the power to prevent either the
Trustee or the investor certificateholders from appointing a successor
Servicer. See "Certain Legal Aspects of the Receivables--Transfer of
Receivables" and "--Certain Matters Relating to Receivership".
 
  The Accounts and Receivables are subject to numerous federal and state
consumer protection laws which impose requirements on the making, enforcement
and collection of consumer loans. The United States Congress and the states
may enact laws and amendments to existing laws to regulate further the credit
card industry or to reduce finance charges or other fees or charges applicable
to credit card accounts. Such laws, as well as any new laws or rulings which
may be adopted, may adversely affect the Servicer's ability to collect on the
Receivables or maintain the required level of periodic finance charges, annual
membership fees and other fees. In addition, failure by the Servicer to comply
with such requirements could adversely affect the Servicer's ability to
enforce the Receivables. In October 1987 and November 1991, members of
Congress attempted unsuccessfully to limit the maximum annual percentage rate
that may be assessed on credit card accounts. On May 5, 1992, two members of
the House Banking Committee asked the United States General Accounting Office
to undertake a study of competition in the credit card industry and
particularly to address how a government-imposed limit on credit card interest
rates could affect credit availability. In Spring 1994 the General Accounting
Office released its study on competitive pricing and disclosure in the credit
card industry. The GAO did not recommend that Congress enact legislation
capping interest rates on credit cards, but did recommend continued monitoring
of the industry. The Banks cannot predict what action, if any, will be taken
by Congress as a result thereof. In addition, in late March 1994, a member of
Congress introduced a rate cap bill which would cap credit card rates at 9%
over the three-month treasury bill rate but it failed to receive attention in
the Congress. If federal legislation were enacted which contained an interest
rate cap substantially lower than the annual percentage rates currently
assessed on the Accounts, it is likely that the amount of Surplus Finance
Charge Collections (averaged over a period of three consecutive Due Periods)
would be reduced to a rate below the Required Surplus Finance Charge Amount
for the last of such Due Periods and therefore an Economic Early Amortization
Event would occur with respect to the Investor Certificates. See "Series
Provisions--Early Amortization Events". In addition, during recent years,
there has been increased consumer awareness with respect to the level of
finance charges and fees and other practices of credit card issuers. As a
result of these developments and other factors, there can be no assurance as
to whether any federal or state legislation will be promulgated which would
impose additional limitations on the monthly periodic finance charges or fees
relating to the Accounts.
 
                                      18
<PAGE>
 
  Since October 1991, a number of lawsuits have been filed in several states
against Citibank (South Dakota) and other out-of-state credit card issuing
banks (both federally-insured state-chartered banks and federally-insured
national banks) which challenge various fees and charges (such as late fees,
over-the-limit fees, returned check charges and annual membership fees)
assessed against residents of the states in which such suits were filed, based
on restrictions or prohibitions under such states' laws alleged to be
applicable to the out-of-state credit card issuers. On June 3, 1996 in Smiley
v. Citibank (South Dakota), N.A., the Supreme Court of the United States, in a
unanimous opinion in favor of Citibank (South Dakota), ruled that the
interpretation by the Comptroller of the Currency of the term "interest" for
purposes of the National Bank Act was entitled to judicial deference. The
Comptroller had ruled that late fees and other compensation for the extension
of credit are "interest" for purposes of the National Bank Act. As a result of
this decision, all such pending cases against Citibank (South Dakota) have
been ordered dismissed.
 
  Pursuant to the Pooling Agreement, if the interest of the investor
certificateholders of all Series in a Receivable is materially adversely
affected by the failure of the Receivable to comply in all material respects
with applicable requirements of law, the interest of such investor
certificateholders in all Receivables in the affected Account will be
reassigned to the Banks or, in some circumstances, to the Servicer. On the
Series Issuance Date, the Banks will make certain other representations and
warranties relating to the validity and enforceability of the Accounts and the
Receivables. The sole remedy if any such representation or warranty is
breached and such breach has a material adverse effect on the interest of
investor certificateholders of all Series in any Receivable and continues
beyond the applicable cure period, is that the interest of investor
certificateholders of all Series in the Receivables affected thereby will be
reassigned to the Banks or assigned to the Servicer, as the case may be. In
addition, in the event of the breach of certain representations and
warranties, the Banks may be obligated to accept the reassignment of the
entire Trust portfolio. See "The Pooling Agreement Generally--Representations
and Warranties" and "--Servicer Covenants" and "Certain Legal Aspects of the
Receivables--Consumer Protection Laws".
 
  Social, Legal, Economic and Other Factors. Changes in card use and payment
patterns by cardholders result from a variety of economic, legal and social
factors. Economic factors include the rate of inflation, unemployment levels
and relative interest rates. The use of incentive programs (e.g., gift awards
for card usage) may affect card use. The Banks are unable to determine and
have no basis to predict whether or to what extent changes in applicable laws
or other economic or social factors will affect card use or repayment
patterns.
 
  Competition in the Bank Credit Card Industry. The credit card industry is
highly competitive and operates in a legal and regulatory environment
increasingly focused on the cost of services charged for credit cards. There
is increased use of advertising, target marketing, pricing competition and
incentive programs. New credit card issuers seek to expand or enter the
market. In addition, certain credit card issuers assess periodic finance
charges or other fees or charges at rates lower than the rate currently being
assessed on most of the Accounts. Citibank (South Dakota) may also solicit
existing cardholders to open other revolving credit card accounts which offer
certain benefits not available under the Accounts, including lower periodic
finance charges or reduced late charges and other fees or charges. If
cardholders choose to utilize competing sources of credit, the rate at which
new Receivables are generated in the Accounts may be reduced and certain
purchase and payment patterns with respect to Receivables may be affected. The
Trust will be dependent upon the Banks' continued ability to generate new
Receivables. If the rate at which new Receivables are generated declines
significantly and the Banks do not add Additional Accounts to the Trust, an
Early Amortization Event could occur.
 
  The Ability of Citibank (South Dakota) to Change Terms of the
Accounts. Pursuant to the Pooling Agreement, the Banks do not transfer to the
Trust the Accounts but only the Receivables arising in the Accounts. As owner
of the Accounts, Citibank (South Dakota) will have the right to determine the
periodic finance charge, the fees and other charges which will be applicable
from time to time to the Accounts, to alter the minimum monthly payment
required under the Accounts and to change various other terms with respect to
the Accounts. A decrease in the periodic finance charge or other fees or
charges applicable to the Accounts would decrease the effective yield on the
Accounts and could result in the occurrence of an Early Amortization Event.
Under the
 
                                      19
<PAGE>
 
Pooling Agreement, Citibank (South Dakota) has agreed that, unless required by
law or unless, in its good faith judgment, it deems it necessary to maintain
on a competitive basis its credit card business, it will not take actions
which would reduce the Portfolio Yield to less than the sum of (a) the
weighted average certificate rate of each class of investor certificates of
each Series (provided that, if the certificate rate of a class is a floating
rate, such calculation shall be determined after giving effect to the benefit
of any related interest rate cap agreement or interest rate swap agreement)
and (b) the weighted average of the Net Servicing Fee Rate applicable to each
Series. The term "Portfolio Yield" means, with respect to any Due Period, the
annualized percentage equivalent of a fraction the numerator of which is the
amount of Finance Charge Receivables collected during the immediately
preceding Due Period calculated on a cash basis, after subtracting therefrom
the sum of (a) the excess, if any, of the amount of Principal Receivables
which were charged off as uncollectible in such immediately preceding Due
Period over the aggregate amount of recoveries on charged-off Principal
Receivables for such immediately preceding Due Period and (b) the aggregate
amount of Servicer Interchange with respect to the Investor Certificates and
any similar amount with respect to all other outstanding Series for such
immediately preceding Due Period, and the denominator of which is the total
amount of Principal Receivables as of the last day of such immediately
preceding Due Period; provided, however, that with respect to any Due Period
in which a Lump Sum Addition or removal of Accounts occurs, the denominator
will be a weighted average amount of Principal Receivables for such Due
Period. In addition, Citibank (South Dakota) has also agreed that, unless
required by law, it will not take any action which would reduce the Portfolio
Yield to less than the highest certificate rate for any outstanding Series or
class (provided that, if the certificate rate of a class is a floating rate,
such calculation shall be determined after giving effect to the benefit of any
related interest rate cap agreement or interest rate swap agreement). Citibank
(South Dakota) has also agreed not to change the terms of the Accounts unless
the change is also made applicable to the comparable segment of its portfolio
of accounts with characteristics similar to the Accounts which are the subject
of such change. In addition, Citibank (South Dakota) has agreed that, upon the
occurrence of the Early Amortization Event described in clause (f) of "Series
Provisions--Early Amortization Events" (relating to the amount of Surplus
Finance Charge Collections being less than the Required Surplus Finance Charge
Amount), Citibank (South Dakota) will not, unless required by law, reduce the
periodic finance charges on the Accounts to a rate that would result in the
weighted average periodic finance charge on the Accounts being less than the
weighted average certificate rate of each class of investor certificates of
each Series (provided that, if the certificate rate of a class is a floating
rate, such calculation shall be determined after giving effect to the benefit
of any related interest rate cap agreement or interest rate swap agreement)
plus 6% per annum. Except as specified above, there are no restrictions on the
ability of Citibank (South Dakota) to change the terms of the Accounts. There
can be no assurances that changes in applicable law, changes in the
marketplace or prudent business practice might not result in a determination
by Citibank (South Dakota) to decrease customer finance charges or otherwise
to take actions which would change other Account terms. In servicing the
Accounts, the Servicer is required to exercise the same care and apply the
same policies that it exercises in handling similar matters for its own or
other comparable accounts.
 
  Control. Subject to certain exceptions, the investor certificateholders of
each Series may take certain actions, or direct certain actions to be taken,
under the Pooling Agreement or the related Supplement. However, under certain
circumstances, the consent or approval of a specified percentage of the
aggregate unpaid principal amount of the investor certificates of all
outstanding Series will be required to direct certain actions, including
requiring the appointment of a successor Servicer following a Servicer
Default, amending the Pooling Agreement under certain circumstances and
directing a reassignment of the entire portfolio of Accounts. In addition,
following the occurrence of an Insolvency Event, the Trust Assets will be
liquidated unless the holders of investor certificates evidencing more than
50% of the aggregate unpaid principal amount of each Series or each class of
each Series (along with each other holder of the Banks' Certificate and, in
the case of certain Series, any credit enhancer with respect thereto) direct
the Trustee not to sell or otherwise liquidate the Receivables.
 
                                   THE BANKS
 
  Citibank (South Dakota), a national banking association and an indirect
wholly owned subsidiary of Citicorp located in Sioux Falls, South Dakota, was
formed in 1981 and conducts nationwide consumer lending programs
 
                                      20
<PAGE>
 
primarily comprised of credit card-related activities. Citibank (South Dakota)
is the nation's largest bank credit card issuer. The principal executive
office of Citibank (South Dakota) is located at 701 East 60th Street, North,
Sioux Falls, South Dakota 57117 (telephone (605) 331-2626).
 
  Citibank (Nevada), a national banking association and an indirect wholly
owned subsidiary of Citicorp located in Las Vegas, Nevada, was formed in 1985
and conducts a retail banking business in the Las Vegas, Nevada area and
services credit card accounts for certain of its affiliates. The principal
executive office of Citibank (Nevada) is located at 8725 West Sahara Avenue,
Las Vegas, Nevada 89163 (telephone (702) 797-4444).
 
                                USE OF PROCEEDS
 
  The net proceeds from the sale of the Investor Certificates will be paid to
the Banks. The Banks will use such proceeds for general corporate purposes.
 
                                   THE TRUST
 
  The Trust, as a master trust, has issued other series of investor
certificates and is expected to issue additional Series from time to time and
to continue as a trust after the Series Termination Date with respect to the
Investor Certificates. The Trust has not engaged and will not engage in any
business activity other than acquiring and holding Trust Assets and proceeds
therefrom, issuing investor certificates and the Banks' Certificate and making
payments thereon and related activities. See "Special Considerations--Master
Trust Considerations". As a consequence, the Trust does not and is not
expected to have any source of capital resources other than the Trust Assets.
The Trust will be administered in accordance with the laws of the State of New
York.
 
  The Banks have conveyed to the Trust, without recourse, their respective
interests in all Receivables arising under the Accounts. The Trust Assets
consist of the Receivables, all monies due or to become due thereunder, the
proceeds of the Receivables, the right to receive certain Interchange
attributed to cardholder charges for merchandise and services in the Accounts,
all monies on deposit in the Collection Account and in certain accounts
maintained for the benefit of the investor certificateholders of any Series,
funds collected or to be collected from Participations, if any, and any Series
Enhancements. The Trust Assets are expected to change over the life of the
Trust as revolving credit card accounts and related assets become subject to
the Trust and as Accounts are closed, charged-off or removed and are no longer
subject to the Trust. The investor certificateholders of a particular Series
will not have any interest in any Series Enhancement issued with respect to
any other Series. Pursuant to the Pooling Agreement, the Banks will have the
right (subject to certain limitations and conditions), and in some
circumstances will be obligated, to designate as Trust Assets Receivables
arising in Additional Accounts or, in lieu thereof or in addition thereto,
Participations. See "Master Trust Provisions--Addition of Trust Assets". In
addition, the Banks will have the right to remove from the Trust Receivables
arising in designated Accounts as described herein under "Master Trust
Provisions--Removal of Accounts".
 
                            MASTER TRUST PROVISIONS
 
ADDITION OF TRUST ASSETS
 
  If the total amount of Principal Receivables is less than the Required
Minimum Principal Balance as of the close of business on the last business day
of any calendar week, the Banks shall on or prior to the close of business on
the earlier of (a) the fortieth calendar day following the last business day
of such calendar week or (b) if any Series is in its accumulation period,
amortization period or early amortization period, the tenth business day
following the last business day of the Due Period in which such calendar week
occurs, make a Lump Sum Addition to the Trust such that, after giving effect
to such addition, the total amount of Principal Receivables is at least equal
to the Required Minimum Principal Balance. A "Lump Sum Addition" will consist
of (i) receivables arising in additional Eligible Accounts from the Portfolio,
(ii) receivables arising in portfolios of
 
                                      21
<PAGE>
 
revolving credit card accounts acquired by the Banks from other credit card
issuers, (iii) receivables arising from certain nonpremium and premium
MasterCard and VISA credit card accounts previously transferred by the Banks
to certain trusts in transactions similar to that described in this Prospectus
which have reached their maturity dates, (iv) receivables arising in any other
revolving credit card accounts of a type which has previously not been
included in the Accounts and (v) participations representing undivided
interests in a pool of assets primarily consisting of revolving credit card
accounts and collections thereon ("Participations"). Lump Sum Additions will
generally consist of existing accounts while additions of New Accounts will
consist of newly originated accounts. The addition of Participations in the
Trust pursuant to this paragraph shall be effected by an amendment to the
Pooling Agreement which would not require the consent of investor
certificateholders. The Banks may, upon 30 days prior notice to the Trustee,
the Rating Agency and any provider of Series Enhancement, reduce the Required
Minimum Principal Balance, provided that such reduction will not result in a
Ratings Effect or an Adverse Effect and provided further the Required Minimum
Principal Balance shall never be less than 102% of the sum of the initial
invested amounts of all outstanding investor certificates of all Series (or,
if applicable with respect to a particular Series, the highest invested amount
during a Due Period, or, during any accumulation period, scheduled
amortization period, early amortization period or class A amortization period,
the highest invested amount during the Due Period preceding the first Due
Period with respect to such accumulation period, scheduled amortization
period, early amortization period or class A amortization period). In
addition, the Banks may from time to time, at their sole discretion, subject
to the conditions specified in the second succeeding paragraph, voluntarily
make a Lump Sum Addition to the Trust.
 
  The Banks have designated, and may from time to time in the future, at their
sole discretion, designate, newly originated Eligible Accounts to be included
as Accounts ("New Accounts"), subject to the limitations specified in this
paragraph and the conditions specified in the next succeeding paragraph.
Unless the Rating Agency otherwise consents, the number of New Accounts
designated with respect to any of the three consecutive Due Periods beginning
in January, April, July and October of each calendar year shall not exceed 15%
of the number of Accounts as of the first day of the calendar year during
which such Due Periods commence and the number of New Accounts designated
during any such calendar year shall not exceed 20% of the number of Accounts
as of the first day of such calendar year. On or before the first business day
of each Due Period beginning in January, April, July and October of each
calendar year, the Banks shall have requested and obtained notification from
the Rating Agency of any limitations to the right of the Banks to designate
newly originated Eligible Accounts as New Accounts during any period which
includes such Due Period. On or before January 31, April 30, July 31 and
October 31 of each calendar year, the Trustee shall have received confirmation
from the Rating Agency that the addition of all New Accounts included as
Accounts during the three consecutive Due Periods ending in the calendar month
prior to such date shall not have resulted in a Ratings Effect. On or before
January 31 and July 31 of each calendar year (or on or before the last day of
each month in certain circumstances), the Banks shall have delivered to the
Trustee, the Rating Agency and any provider of Series Enhancement an opinion
of counsel with respect to the New Accounts included as Accounts during the
preceding calendar year confirming the validity and perfection of each
transfer of such New Accounts. If such Rating Agency confirmation or opinion
of counsel with respect to any New Accounts is not so received, such New
Accounts will be removed from the Trust. New Accounts and Accounts relating to
any Lump Sum Addition are collectively referred to herein as "Additional
Accounts".
 
  The Banks will convey to the Trust the Receivables arising in Additional
Accounts subject to the following conditions, among others: (a) in the case of
Lump Sum Additions, on or before the fifth business day immediately preceding
such addition the Banks shall have given the Trustee, the Servicer, the Rating
Agency and any provider of Series Enhancement written notice that the
Receivables arising in the Additional Accounts or Participations will be
included as Trust Assets; (b) the Additional Accounts shall all be Eligible
Accounts; (c) in the case of Lump Sum Additions, within five business days of
the date on which the Receivables arising in the related Accounts are added to
the Trust, and in the case of New Accounts, less than 90 days following their
addition to the Trust, the Banks shall have delivered to the Trustee a written
assignment and a computer file or microfiche list containing a true and
complete list of the Additional Accounts specifying for each such Account its
account number and, in the case of Lump Sum Additions, the aggregate amount
outstanding in such
 
                                      22
<PAGE>
 
Account and the aggregate amount of Principal Receivables outstanding in such
Account; (d) in the case of Additional Accounts, the list of Additional
Accounts delivered pursuant to clause (c) above, is true and complete in all
material respects; (e) in the case of Lump Sum Additions, the Trustee shall
have received confirmation from the Rating Agency that such addition will not
result in a Ratings Effect; (f) in the case of Lump Sum Additions, the Banks
shall have delivered to the Trustee, the Rating Agency and any provider of
Series Enhancement an opinion of counsel to the effect that addition of the
Receivables arising in the Lump Sum Additions or of the Participations to the
Trust will not result in the Trust being considered an "investment company"
for purposes of the Investment Company Act of 1940, as amended (the
"Investment Company Act"); (g) in the case of Lump Sum Additions, prior to or
on the date the related Receivables are added to the Trust, and in the case of
New Accounts, on the Distribution Date following the Due Period in which such
New Accounts are originated, the Banks shall have delivered to the Trustee and
any provider of Series Enhancement a certificate of an authorized officer
stating that the Banks reasonably believe that such addition will not (i) at
the time of its occurrence or at a future date cause an Adverse Effect and
(ii) in the case of Participations, be any less favorable in any material
respect to the interests of any certificateholder of any Series or any
provider of Series Enhancement than would be the addition of Lump Sum
Additions; (h) such conveyance of Receivables in Additional Accounts will not
at the time of such conveyance cause an Early Amortization Event to occur; and
(i) in the case of Lump Sum Additions (other than, with certain exceptions, in
the case of required additions), the Banks shall have delivered to the
Trustee, the Rating Agency and any provider of Series Enhancement an opinion
of counsel acceptable to the Trustee that for federal and South Dakota income
and franchise tax purposes (x) following such addition the Trust will not be
an association (or publicly traded partnership) taxable as a corporation and
(y) such addition will not adversely affect the characterization of the
investor certificates of any Series as debt and will not cause a taxable event
to holders of any such investor certificates. In addition, the addition of New
Accounts will be subject to the further condition that credit card accounts of
a type not included in the Accounts at the time of their addition may only be
designated as New Accounts upon compliance with the conditions described above
applicable to Lump Sum Additions.
 
  Affiliates of the Banks currently own or may acquire portfolios of revolving
credit card accounts the receivables in which in the future may be
participated to the Banks and sold to the Trust. Such a sale of receivables to
the Trust will be subject to the conditions described above relating to Lump
Sum Additions.
 
  Additional Accounts will be subject to different eligibility criteria than
the Initial Accounts. See "The Pooling Agreement Generally--Representations
and Warranties". Such Additional Accounts may include accounts originated
using criteria different from those which were applied to the Initial Accounts
because such accounts were originated at a later date or were part of a
portfolio of credit card accounts which were not part of the Portfolio or
which were acquired from another credit card issuer. Moreover, Additional
Accounts may not be accounts of the same type previously included in the
Trust. Consequently, there can be no assurance that such Additional Accounts
will be of the same credit quality as the Initial Accounts or the Additional
Accounts included in the Trust since the Trust Cut-Off Date.
 
  Additional Accounts of a type different than the Initial Accounts may
contain Receivables which consist of fees, charges and amounts which are
different from the fees, charges and amounts which have been designated as
Finance Charge Receivables and Principal Receivables herein and Participations
may be added to the Trust as Lump Sum Additions. In either case, the Servicer
will designate the portions of funds collected or to be collected in respect
of such Receivables or Participations to be treated for purposes of the
Pooling Agreement as Principal Receivables and Finance Charge Receivables.
Furthermore, in the event that Receivables are purchased from the Banks at a
discount, a portion of the Principal Receivables so purchased, in an amount
equal to the amount of such discount, may be treated for purposes of the
Pooling Agreement and any Supplement as a collection of Finance Charge
Receivables. See "Special Considerations--Master Trust Considerations--
Addition of Trust Assets".
 
REMOVAL OF ACCOUNTS
 
  On any day of any Due Period the Banks shall have the right to require the
reassignment to them or their designee of all the Trust's right, title and
interest in, to and under the Receivables then existing and thereafter
 
                                      23
<PAGE>
 
created, all monies due or to become due and all amounts received with respect
thereto and all proceeds thereof in or with respect to the Removed Accounts
designated by the Banks, upon satisfaction of the following conditions: (a) on
or before the fifth business day immediately preceding the date upon which
such Accounts are to be removed, the Banks shall have given the Trustee, the
Servicer, the Rating Agency and any provider of Series Enhancement written
notice of such removal specifying the date for removal of the Removed Accounts
(the "Removal Date"); (b) on or prior to the date that is five business days
after the Removal Date, the Banks shall have delivered to the Trustee a
computer file or microfiche list containing a true and complete list of the
Removed Accounts specifying for each such Account, as of the removal notice
date, its account number, the aggregate amount outstanding in such Account and
the aggregate amount of Principal Receivables outstanding in such Account; (c)
the Banks shall have represented and warranted as of each Removal Date that
the list of Removed Accounts delivered pursuant to clause (b) above, as of the
Removal Date, is true and complete in all material respects; (d) the Trustee
shall have received confirmation from the Rating Agency that such removal will
not result in a Ratings Effect; (e) the Banks shall have delivered to the
Trustee and any provider of Series Enhancement a certificate of an authorized
officer, dated the Removal Date, to the effect that the Banks reasonably
believe that such removal will not at the time of its occurrence or at a
future date cause an Adverse Effect; and (f) the Banks shall have delivered to
the Trustee, the Rating Agency and any provider of Series Enhancement an
opinion of counsel acceptable to the Trustee that for federal and South Dakota
income and franchise tax purposes (i) following such removal the Trust will
not be an association (or publicly traded partnership) taxable as a
corporation and (ii) such removal will not adversely affect the
characterization of the investor certificates of any Series as debt and will
not cause a taxable event to holders of any such investor certificates.
 
  Upon satisfaction of the above conditions, the Trustee shall execute and
deliver to the Banks a written reassignment and shall be deemed to sell,
transfer, assign, set over and otherwise convey to Citibank (South Dakota) or
its designee, without recourse, representation or warranty, all the right,
title and interest of the Trust in and to the Receivables arising in the
Removed Accounts, all monies due and to become due and all amounts received
with respect thereto and all proceeds thereof.
 
NEW ISSUANCES
 
  The Pooling Agreement provides that, pursuant to any one or more
Supplements, the Banks may direct the Trustee to issue from time to time new
Series subject to the conditions described below (each such issuance a "New
Issuance"). Each New Issuance will have the effect of decreasing the Banks'
Interest to the extent of the invested amount of such new Series. Under the
Pooling Agreement, the Banks may designate, with respect to any newly issued
Series: (i) its name or designation; (ii) its initial principal amount (or
method for calculating such amount); (iii) its certificate rate (or formula
for the determination thereof); (iv) the interest payment date or dates and
the date or dates from which interest shall accrue; (v) the method for
allocating collections to investor certificateholders; (vi) any bank accounts
to be used by such Series and the terms governing the operation of any such
bank accounts; (vii) the percentage used to calculate monthly servicing fees;
(viii) the minimum amount of Principal Receivables required to be maintained
through the designation of Additional Accounts; (ix) the issuer and terms of
any form of Series Enhancement with respect thereto; (x) the terms on which
the investor certificates of such Series may be repurchased or remarketed to
other investors; (xi) the Series issuance date (the "Series Issuance Date")
and Series termination date (the "Series Termination Date"); (xii) the number
of classes of investor certificates of such Series, and if more than one
class, the rights and priorities of each such class; (xiii) the extent to
which the investor certificates of such Series will be issuable in temporary
or permanent global form (and, in such case, the depositary for such global
certificate or certificates, the terms and conditions, if any, upon which such
global certificate may be exchanged, in whole or in part, for definitive
certificates, and the manner in which any interest payable on a global
certificate will be paid); (xiv) whether the investor certificates of such
Series may be issued in bearer form and any limitations imposed thereon; (xv)
the priority of any Series with respect to any other Series; (xvi) whether
such Series will be part of a Group; and (xvii) any other relevant terms (all
such terms, the "Principal Terms" of such Series). None of the Banks, the
Servicer, the Trustee or the Trust is required or intends to obtain the
consent of any investor certificateholder of any
 
                                      24
<PAGE>
 
outstanding Series to issue any additional Series. The Banks may offer any
Series to the public under a Prospectus Supplement or other Disclosure
Document in transactions either registered under the Securities Act or exempt
from registration thereunder directly, through one or more underwriters or
placement agents, in fixed-price offerings or in negotiated transactions or
otherwise. See "Plan of Distribution". Any such Series may be issued in fully
registered, bearer or book-entry form in minimum denominations determined by
the Banks. The Banks intend to offer, from time to time, additional Series.
 
  The Supplement for a newly issued Series will specify whether such Series
will be included in Group One or any other Group. The Supplement for a Series
included in a Group may provide for the reallocation of collections on
Receivables and other amounts or obligations among all Series in such Group in
the manner and to the extent described in the Supplements relating to each
Series in the Group. Consequently, the issuance of a new Series in a Group may
have the effect of reducing the amount of collections of Finance Charge
Receivables which are reallocated to the investor certificates of existing
Series in the Group. For example, in Group One, which provides for the
reallocation of collections of Finance Charges Receivables allocable to a
Series among all Series in such Group, an additional Series which is issued
with a larger claim with respect to monthly interest than that of previously
issued Series in Group One (due to a higher certificate rate) will receive a
proportionately larger reallocation of Group One Investor Finance Charges.
Such issuance will reduce the amount of Group One Investor Finance Charges
which are reallocated to the existing Series in Group One. Conversely, the
issuance of an additional Series with a smaller claim with respect to monthly
interest (due to a lower certificate rate) will have the effect of increasing
the amount of collections of Group One Investor Finance Charges reallocated to
existing Series in Group One. The Banks are under no obligation to cause the
issuance of additional Series in Group One or in any other Group. The Trust
may also issue Series from time to time which are not part of a Group and
which do not share in the reallocation of collections of Finance Charge
Receivables allocable to other Series.
 
  A Series may also be issued to provide credit enhancement for one or more
other Series. The certificates of such Series would provide for the
reallocation of collections of Principal Receivables otherwise allocable to
such Series to avoid charge-offs against the investor certificates of the
Series to which such new Series is subordinated. With respect to any Series,
except to the extent expressly provided in such Series' Supplement, no other
Series will have a claim to collections on the Receivables allocated to such
Series.
 
  The Pooling Agreement provides that the Banks may designate Principal Terms
such that each Series has a period during which accumulation of the principal
amount thereof in a principal funding account or amortization of the principal
amount thereof is intended to occur which may have a different length and
begin on a different date than such periods for any other Series. Further, one
or more Series may be in their accumulation or amortization periods while
other Series are not. Collections of Principal Receivables otherwise allocable
to a Series may be reallocated to a Series which is amortizing or accumulating
principal. Moreover, each Series may have the benefits of Series Enhancements
issued by enhancement providers different from the providers of Series
Enhancement with respect to any other Series. Under the Pooling Agreement, the
Trustee shall hold any such Series Enhancement only on behalf of the Series to
which such Series Enhancement relates. With respect to each such Series
Enhancement, the Banks may deliver a different form of Series Enhancement
agreement. The Banks also have the option under the Pooling Agreement to vary
among Series the terms upon which a Series may be repurchased by the Banks or
remarketed to other investors. There is no limit to the number of New
Issuances that the Banks may cause under the Pooling Agreement. The Trust will
terminate only as provided in the Pooling Agreement. There can be no assurance
that the terms of any Series might not have an impact on the timing and amount
of payments received by an investor certificateholder of another Series.
 
  Under the Pooling Agreement and pursuant to a Supplement, a New Issuance may
only occur upon the satisfaction of certain conditions provided in the Pooling
Agreement. The obligation of the Trustee to issue the investor certificates of
such new Series and to execute and deliver the related Supplement is subject
to the satisfaction of the following conditions: (a) on or before the fifth
business day immediately preceding the date upon which the New Issuance is to
occur, the Banks shall have given the Trustee, the Servicer, the Rating Agency
and any provider of Series Enhancement written notice of such New Issuance and
the date upon which the New Issuance is to occur; (b) the Banks shall have
delivered to the Trustee the related Supplement, in form
 
                                      25
<PAGE>
 
satisfactory to the Trustee, executed by each party to the Pooling Agreement
other than the Trustee; (c) the Banks shall have delivered to the Trustee any
related Series Enhancement agreement executed by each of the parties to such
agreement; (d) the Trustee shall have received confirmation from the Rating
Agency that such New Issuance will not result in a Ratings Effect; (e) the
Banks shall have delivered to the Trustee and any provider of Series
Enhancement a certificate of an authorized officer, dated the date upon which
the New Issuance is to occur, to the effect that the Banks reasonably believe
that such issuance will not at the time of its occurrence or at a future date
cause an Adverse Effect; (f) the Banks shall have delivered to the Trustee,
the Rating Agency and any provider of Series Enhancement an opinion of counsel
acceptable to the Trustee that for federal and South Dakota income and
franchise tax purposes (i) following the New Issuance the Trust will not be an
association (or publicly traded partnership) taxable as a corporation, (ii)
the new investor certificates will be properly characterized as debt, and
(iii) the New Issuance will not adversely affect the characterization of the
investor certificates of any other Series as debt and will not cause a taxable
event to holders of any such investor certificates; (g) the Banks' remaining
interest in Principal Receivables shall not be less than 2% of the total
amount of Principal Receivables, in each case as of the date upon which the
New Issuance is to occur after giving effect to such issuance; and (h) any
other conditions specified in any Supplement. Upon satisfaction of the above
conditions, the Trustee shall execute the Supplement and issue to the Banks
the investor certificates of such new Series for execution and redelivery to
the Trustee for authentication.
 
COLLECTION ACCOUNT
 
  The Servicer has established and maintains for the benefit of the Investor
Certificateholders and the holders of investor certificates of any other
Series, in the name of the Trustee, on behalf of the Trust, an Eligible
Deposit Account bearing a designation clearly indicating that the funds
deposited therein are held for the benefit of the Investor Certificateholders
and the investor certificateholders of any other Series (the "Collection
Account"). "Eligible Deposit Account" means either (a) a segregated account
with an Eligible Institution or (b) a segregated trust account with the
corporate trust department of a depository institution organized under the
laws of the United States or any one of the states thereof, including the
District of Columbia (or any domestic branch of a foreign bank), and acting as
a trustee for funds deposited in such account, so long as any of the
securities of such depository institution shall have a credit rating from the
Rating Agency in one of its generic credit rating categories which signifies
investment grade. "Eligible Institution" means a depository institution
organized under the laws of the United States or any one of the states
thereof, including the District of Columbia (or any domestic branch of a
foreign bank) which at all times (a) has either (i) a long-term unsecured debt
rating of A2 or better by Moody's Investors Service, Inc. ("Moody's") or (ii)
a certificate of deposit rating of P-1 by Moody's, and (b) has (i) in the case
of the Collection Account, if such depository institution is an affiliate of
Citicorp, a certificate of deposit rating of A-1 or better by Standard &
Poor's Corporation ("Standard & Poor's") or (ii) for any other depository
institution, either (x) a long-term unsecured debt rating of AAA by Standard &
Poor's or (y) a certificate of deposit rating of A-1+ by Standard & Poor's.
The Collection Account will initially be maintained with Citibank (South
Dakota). If at any time the Collection Account ceases to be an Eligible
Deposit Account, the Collection Account shall be moved so that it will again
be qualified as an Eligible Deposit Account. Funds in the Collection Account
generally will be invested in (i) obligations fully guaranteed by the United
States of America, (ii) demand deposits, time deposits or certificates of
deposit of depository institutions or trust companies, the commercial paper,
if any, of which has the highest rating from the Rating Agency, (iii)
commercial paper having, at the time of the Trust's investment therein, a
rating in the highest rating category from the Rating Agency, (iv) demand
deposits, time deposits and certificates of deposit which are fully insured by
the FDIC, (v) notes or bankers' acceptances issued by any depository
institution or trust company described in (ii) above, (vi) money market funds
which have the highest rating from, or have otherwise been approved in writing
by, the Rating Agency, (vii) time deposits (having maturities of not more than
30 days) with an entity, the commercial paper of which has the highest rating
from the Rating Agency or demand notes of Citicorp for so long as Citicorp's
commercial paper has the highest rating from the Rating Agency and (viii) any
other investments approved in writing by the Rating Agency (collectively,
"Eligible Investments"). Eligible Investments may be purchased from affiliates
of the Banks. It is expected that such funds will be invested in debt
obligations of Citicorp or its affiliates as long as such obligations qualify
as Eligible Investments. Any
 
                                      26
<PAGE>
 
earnings (net of losses and investment expenses) on funds in the Collection
Account will be paid to the Banks except as otherwise specified in any
Supplement. The Servicer will have the revocable power to withdraw funds from
the Collection Account and to instruct the Trustee to make withdrawals and
payments from the Collection Account for the purpose of carrying out its
duties under the Pooling Agreement, the Series Supplement and any other
Supplement.
 
DEPOSITS IN COLLECTION ACCOUNT
 
  For as long as (i) Citibank (South Dakota) remains the Servicer under the
Pooling Agreement and (ii) Citibank (South Dakota) maintains a certificate of
deposit rating of at least A-1 and P-1 (or their equivalent) by the Rating
Agency, Citibank (South Dakota) may use for its own benefit all collections
received with respect to the Receivables in each Due Period until the related
Distribution Date, at which time Citibank (South Dakota) will deposit all such
collections, to the extent described below, into the Collection Account, and
the Servicer will make the deposits and payments to the accounts and parties
described herein on the date of such deposit, provided that if any class of
Investor Certificates has the benefit of an interest rate swap agreement and a
net swap payment is required to be made to the swap counterparty on a swap
payment date, such amount will be deposited in the Collection Account no later
than the business day preceding the related Distribution Date for payment to
the swap counterparty on such swap payment date. See "Series Provisions--
Distributions". However, if Citibank (South Dakota) is no longer the Servicer
or fails to maintain the required certificate of deposit rating, the Servicer
will make such deposits, as described below, not later than two business days
after the date on which the related Receivables are processed. Whether the
Servicer is required to make deposits of collections pursuant to the first or
the second preceding sentence, (i) the Servicer will only be required to
deposit collections into the Collection Account up to the aggregate amount of
collections required to be deposited into an account established for any
Series or, without duplication, distributed on the related Distribution Date
or Payment Date to investor certificateholders of any Series or to the issuer
of any Series Enhancement pursuant to the terms of any Supplement or Series
Enhancement agreement and (ii) if at any time prior to such Distribution Date
or Payment Date the amount of collections deposited in the Collection Account
exceeds the amount required to be deposited pursuant to clause (i) above, the
Servicer will be permitted to withdraw such excess from the Collection
Account. Unless otherwise agreed by the Rating Agency, if at any time Citibank
(South Dakota) or another eligible affiliate of Citicorp is not the Servicer,
the Collection Account will be moved from Citibank (South Dakota), if then
maintained there.
 
  On the day any such deposit is made into the Collection Account, the
Servicer will withdraw from the Collection Account and pay to the Banks (i)
the Banks' allocable portion of Series Allocable Principal Collections,
provided that the Banks' Interest in Principal Receivables on such day (after
giving effect to any new Receivables transferred to the Trust on such day) is
greater than zero; (ii) the Banks' allocable portion of Series Allocable
Finance Charge Collections and (iii) any similar amounts payable to the Banks
with respect to other Series.
 
ALLOCATIONS AMONG SERIES
 
  Pursuant to the Pooling Agreement, during each Due Period the Servicer will
allocate to each outstanding Series its Series Allocable Finance Charge
Collections, Series Allocable Principal Collections, Series Allocable
Defaulted Receivables and Series Allocable Miscellaneous Payments.
 
    "Series Allocable Finance Charge Collections", "Series Allocable
  Principal Collections" and "Series Allocable Defaulted Receivables" mean,
  with respect to any Series and for any Due Period, the product of (a) the
  Series Allocation Percentage and (b) the amount of collections of Finance
  Charge Receivables and Principal Receivables and the amount of all
  Defaulted Receivables with respect to such Due Period, respectively.
 
    "Series Allocation Percentage" means, with respect to any Series and for
  any Due Period, the percentage equivalent of a fraction, the numerator of
  which is the Series Adjusted Invested Amount as of the last day of the
  immediately preceding Due Period and the denominator of which is the Trust
  Adjusted Invested Amount as of such last day.
 
                                      27
<PAGE>
 
    "Series Allocable Miscellaneous Payments" means, with respect to any
  Series and for any Due Period, the product of (a) the Series Allocation
  Percentage and (b) the sum of (i) Adjustment Payments and Transfer Deposit
  Amounts received with respect to such Due Period and (ii) any Unallocated
  Principal Collections available to be treated as such as described herein
  under "Series Provisions--Allocations, Reallocations and Subordination--
  Reallocations Among Investor Certificates of Different Series--Investor
  Principal Collections for all Series".
 
    "Series Adjusted Invested Amount" means, with respect to any Series and
  as of any date, the initial principal amount of the investor certificates
  of such Series (or, if applicable with respect to a particular Series, the
  highest invested amount during the related Due Period or, during any
  accumulation period, scheduled amortization period, early amortization
  period or class A amortization period, the highest invested amount during
  the Due Period preceding the first Due Period with respect to such
  accumulation period, scheduled amortization period, early amortization
  period, or class A amortization period) less the excess, if any, of the
  cumulative amount of investor charge-offs for such Series over the
  aggregate reimbursement of such investor charge-offs.
 
    "Trust Adjusted Invested Amount" means, with respect to any Due Period,
  the sum of the Series Adjusted Invested Amounts for all outstanding Series.
 
                               SERIES PROVISIONS
 
GENERAL
 
  The Investor Certificates will be issued pursuant to the Pooling and
Servicing Agreement dated as of May 29, 1991 (as amended, the "Pooling
Agreement"), and a series supplement thereto relating to the Investor
Certificates (the "Series Supplement"), among the Banks, as sellers of their
respective interests in the Receivables, Citibank (South Dakota), as servicer
of the Accounts, and the Trustee and each substantially in the form filed as
exhibits to the Registration Statement of which this Prospectus is a part.
Pursuant to the Pooling Agreement, the Banks may enter into further
Supplements with the Trustee in order to issue additional Series. See "Master
Trust Provisions--New Issuances". The Trustee will provide a copy of the
Pooling Agreement (without exhibits or schedules), including any Supplements,
to Investor Certificateholders upon written request. The following summary
describes certain terms of the Investor Certificates and is qualified in its
entirety by reference to the Pooling Agreement and the Series Supplement.
 
  The Investor Certificates offered hereby will initially be represented by
one or more Class A Certificates and, if offered by this Prospectus and the
accompanying Prospectus Supplement, one or more Class B Certificates
registered in the name of the nominee of DTC (together with any successor
depository selected by Citibank (South Dakota), the "Depository"), except as
set forth below. Unless otherwise specified in the related Prospectus
Supplement, the Investor Certificates offered hereby will be available for
purchase in minimum denominations of $1,000 and in integral multiples thereof
in book-entry form. The Banks have been informed by DTC that DTC's nominee
will be Cede. See "The Pooling Agreement Generally--Book-Entry Registration"
and "--Definitive Certificates".
 
  The Class A Certificates will evidence undivided beneficial interests in the
Trust Assets allocated to the Class A Interest, representing the right to
receive from such Trust Assets funds up to (but not in excess of) the amounts
required to make payments of interest on the Class A Certificates and the
payment of the Class A Invested Amount on the Class A Expected Final Payment
Date, or earlier or later under certain circumstances. The Class B
Certificates will evidence undivided beneficial interests in the Trust Assets
allocated to the Class B Interest, representing the right to receive from such
Trust Assets funds up to (but not in excess of) the amounts required to make
payments of interest on the Class B Certificates and the payment of the Class
B Invested Amount on the Class B Expected Final Payment Date, or earlier or
later under certain circumstances.
 
                                      28
<PAGE>
 
INTEREST
 
  Interest will accrue on the unpaid principal amount of the Class A
Certificates at the per annum rate specified in the related Prospectus
Supplement (the "Class A Certificate Rate") and, except as otherwise provided
herein, be distributed to the Class A Certificateholders on each Interest
Payment Date. On each Distribution Date, Class A Monthly Interest and Class A
Monthly Interest previously due but not deposited into the Class A Interest
Funding Account on a prior Distribution Date (and, with respect to the
Accumulation Period, the Class A Investment Proceeds, up to an amount equal to
the Class A Covered Amount, plus an amount equal to any Class A Funding
Account Shortfall) will be deposited in an Eligible Deposit Account in the
name of the Trustee (the "Class A Interest Funding Account"), which will
initially be maintained with Citibank, N.A.
 
  Interest will accrue on the unpaid principal amount of the Class B
Certificates at the per annum rate specified in the related Prospectus
Supplement (the "Class B Certificate Rate") and, except as otherwise provided
herein, be distributed to the Class B Certificateholders on each Interest
Payment Date. On each Distribution Date, Class B Monthly Interest and Class B
Monthly Interest previously due but not deposited into the Class B Interest
Funding Account on a prior Distribution Date will be deposited in an Eligible
Deposit Account in the name of the Trustee (the "Class B Interest Funding
Account"), which will initially be maintained with Citibank, N.A.
 
  Funds on deposit in the Class A Interest Funding Account and the Class B
Interest Funding Account generally will be invested in certain Eligible
Investments described under "Master Trust Provisions-- Collection Account",
which are expected to be debt obligations of Citicorp or its affiliates so
long as such obligations qualify as Eligible Investments. For purposes of
investments of funds in the Class B Interest Funding Account, the term
"highest rating" as used in the definition of "Eligible Investments" shall
include A-1 as well as A-1+, in the case of a short-term rating by Standard &
Poor's. Any earnings (net of losses and investment expenses) on funds in the
Class A Interest Funding Account and the Class B Interest Funding Account will
be paid to the Banks. If an Early Amortization Period commences, then
thereafter Class A Monthly Interest will be distributed to the Class A
Certificateholders monthly on each Special Payment Date and Class B Monthly
Interest will be distributed to the Class B Certificateholders monthly on each
Special Payment Date and any amounts on deposit in the Class A Interest
Funding Account and the Class B Interest Funding Account will be distributed
to the Class A Certificateholders and Class B Certificateholders,
respectively, on the first Special Payment Date. Unless otherwise specified in
the related Prospectus Supplement, interest due with respect to the Class A
Certificates and the Class B Certificates for any Interest Payment Date will
accrue from and including the preceding Interest Payment Date or, in the case
of the first Interest Payment Date, from and including the Series Issuance
Date, to but excluding such Interest Payment Date, and will be calculated on
the basis of the actual number of days in the year divided by a 360-day year.
Interest with respect to the Investor Certificates due but not paid on any
Payment Date will be due on the next succeeding Payment Date with additional
interest on such amount at the related Class A Certificate Rate or Class B
Certificate Rate, as applicable.
 
  Reallocated Investor Finance Charges for each Due Period will be allocated
to the Class B Interest based on the Class B Invested Amount. If the unpaid
principal balance of the Class B Certificates for any Due Period exceeds the
Class B Invested Amount for such Due Period as a result of the reduction of
the Class B Invested Amount (after giving effect to any increase or decrease
in such amount for such Due Period), the amount deposited in the Class B
Interest Funding Account out of the Reallocated Investor Finance Charges may
be less than the amount of accrued interest on the Class B Certificates. See
"--Allocations, Reallocations and Subordination--Allocations, Reallocations
and Subordination Within a Series--Subordination". As described under "--
Allocations, Reallocations and Subordination--Allocations, Reallocations and
Subordination Within a Series--Excess Finance Charge Collections", Excess
Finance Charge Collections, if any, remaining after certain other payments
have been made with respect to the Class A Certificates will be deposited in
the Class B Interest Funding Account on each Distribution Date to the extent
of any such interest shortfall. To the extent that the accrued and unpaid
interest on the outstanding principal balance of the Class B Certificates and
any interest owed on such unpaid interest exceeds the amount to be deposited
in the Class B Interest Funding Account on any Distribution Date, a draw will
be made under the Credit Enhancement in an amount equal to the lesser of (a)
the
 
                                      29
<PAGE>
 
Available Shared Enhancement Amount on such date (after giving effect to any
draw under the Credit Enhancement on such Distribution Date to fund the
Required Amount, if any) and (b) such excess, and the proceeds thereof will be
deposited in the Class B Interest Funding Account on such Distribution Date.
See "--Series Enhancements--Credit Enhancement Generally".
 
PRINCIPAL
 
  Unless otherwise provided with respect to a particular Series, no principal
payments will be made to the Class A Certificateholders until the Class A
Expected Final Payment Date or, upon the occurrence of an Early Amortization
Event as described herein, until the first Special Payment Date. Payments of
principal in respect of the Class B Certificates will not commence until after
the final principal payment with respect to the Class A Certificates has been
made, except that following the occurrence of an Economic Early Amortization
Event principal of the Class B Certificates will be payable from a draw under
the Credit Enhancement as described under "--Series Enhancements--Credit
Enhancement Generally". On each Distribution Date with respect to the
Revolving Period, collections of Principal Receivables allocable to the
Certificateholders' Interest (other than Subordinated Principal Collections
that are used to fund any amounts other than the Class A Investor Default
Amount), subject to certain limitations, will either be (a) allocated to one
or more Series which are in amortization, early amortization or accumulation
periods to cover principal payments due to the investor certificateholders of
any such Series or (b) if no such Series is then amortizing or accumulating
principal, paid to the Banks to maintain the Certificateholders' Interest or
held as Unallocated Principal Collections. See "--Allocations, Reallocations
and Subordination--Reallocations Among Investor Certificates of Different
Series--Investor Principal Collections for all Series".
 
  Unless and until an Early Amortization Event shall have occurred and until
the Class A Invested Amount is paid in full, on each Distribution Date with
respect to the Accumulation Period, collections of Principal Receivables
allocable to the Certificateholders' Interest plus certain other amounts
comprising Class A Monthly Principal will no longer be paid for the benefit of
another Series or to the Banks as described above but instead an amount
thereof up to the Class A Controlled Distribution Amount for each such date
will be deposited in the Class A Principal Funding Account. See "--Principal
Funding Account". Any such amounts in excess of the Class A Controlled
Distribution Amount will be allocated as described under "--Allocations,
Reallocations and Subordination--Reallocations Among Investor Certificates of
Different Series--Investor Principal Collections for all Series". The funds
deposited in the Class A Principal Funding Account will be used to pay the
Class A Invested Amount on the Class A Expected Final Payment Date. If on such
date the Class A Principal Funding Account Balance is less than the Class A
Invested Amount, the Early Amortization Period will commence and on each
Special Payment Date the Class A Certificateholders will receive distributions
of Class A Monthly Principal and Class A Monthly Interest until the Class A
Invested Amount has been paid in full or the Series Termination Date has
occurred. Even if the Class A Principal Funding Account Balance on the Class A
Expected Final Payment Date is insufficient to pay the Class A Invested Amount
in full, such balance will be distributed to the Class A Certificateholders at
such time.
 
  Unless otherwise provided with respect to a particular Series, it is
expected that the final principal payment with respect to the Class A
Certificates will be made on the Class A Expected Final Payment Date, but the
principal of the Class A Certificates may be paid earlier or, depending on the
actual payment rate on the Receivables and the amount of available Excess
Principal Collections during the Accumulation Period, later, as described
under "Special Considerations--Series Considerations--Payments". If the Class
A Invested Amount is paid in full on the Class A Expected Final Payment Date,
it is expected that the final principal payment with respect to the Class B
Certificates will be made on the Class B Expected Final Payment Date, but the
principal of the Class B Certificates may be paid earlier or, depending on the
actual payment rate on the Receivables and the amount of available Excess
Principal Collections on the Class B Expected Final Payment Date, later, as
described under "Special Considerations--Series Considerations--Payments". If
an Early Amortization Event occurs, principal payments to the Class B
Certificateholders will be made, to the extent of remaining collections
allocated and available therefor, on the Special Payment Date on which the
final principal payment is made to the Class A Certificateholders. In
addition, on the first Special Payment Date following an Economic Early
 
                                      30
<PAGE>
 
Amortization Event, principal payments will be made to the Class A
Certificateholders and the Class B Certificateholders from draws under the
Credit Enhancement as described under "--Series Enhancements--Credit
Enhancement Generally". If the Receivables are sold or repurchased as
described below, principal payments on the Investor Certificates will be made
on the Distribution Date following such sale or repurchase, subject, in the
case of the Class B Certificates, to the prior payment in full of the Class A
Invested Amount.
 
  Unless otherwise provided with respect to a particular Series, on the Class
B Expected Final Payment Date, provided that the Class A Invested Amount is
paid in full on the Class A Expected Final Payment Date and the Early
Amortization Period has not commenced, Available Investor Principal
Collections will be used to pay the Class B Invested Amount as described
herein under "--Allocations, Reallocations and Subordination--Reallocations
Among Investor Certificates of Different Series--Investor Principal
Collections for all Series". If on the Class B Expected Final Payment Date the
Available Investor Principal Collections are less than the Class B Invested
Amount, the Early Amortization Period will commence and on each Distribution
Date thereafter the Class B Certificateholders will receive distributions of
Class B Monthly Principal and Class B Monthly Interest until the Class B
Invested Amount has been paid in full or the Series Termination Date has
occurred. Even if the Available Investor Principal Collections on the Class B
Expected Final Payment Date are insufficient to pay the Class B Invested
Amount in full, all such funds will be distributed to the Class B
Certificateholders at such time.
 
  On each Distribution Date commencing with the Class B Principal Commencement
Date, a draw will be made under the Credit Enhancement to pay principal with
respect to the Class B Certificates to the extent that the unpaid principal
amount of the Class B Certificates exceeds the Class B Invested Amount on such
Distribution Date, in an amount equal to the lesser of (a) the Available
Enhancement Amount on such Distribution Date (after giving effect to all other
draws under the Credit Enhancement on such Distribution Date) and (b) such
excess.
 
  In the event of a sale of the Receivables and an early termination of the
Trust due to an Insolvency Event, an optional repurchase of the
Certificateholders' Interest by the Banks, a repurchase or sale of the
Certificateholders' Interest and the certificateholders' interest for all
other Series in connection with a Servicer Default, a sale of a portion of the
Receivables in connection with the Series Termination Date or a reassignment
of the Certificateholders' Interest and the certificateholders' interest for
all other Series in connection with a breach by the Banks of certain
representations and warranties (each as described under "--Early Amortization
Events", "--Optional Termination; Final Payment of Principal" or "The Pooling
Agreement Generally--Termination of Trust", "--Representations and Warranties"
and "--Servicer Default"), distributions of principal will be made to the
Investor Certificateholders upon surrender of their Investor Certificates.
Following any such sale or repurchase, any Available Enhancement Amount on the
related Distribution Date (after giving effect to all other draws under the
Credit Enhancement on such Distribution Date) will be drawn under the Credit
Enhancement and the proceeds thereof will be distributed to Class B
Certificateholders to the extent that, after giving effect to the distribution
to the Class B Certificateholders of the proceeds from such sale or repurchase
allocated to the Class B Certificateholders (after the Class A Certificates
have been fully paid), the unpaid principal amount of the Class B Certificates
exceeds the Class B Invested Amount. See "--Series Enhancements".
 
ALLOCATIONS, REALLOCATIONS AND SUBORDINATION
 
 ALLOCATION BETWEEN INVESTOR CERTIFICATEHOLDERS AND THE BANKS
 
  The Servicer will allocate to each Series for each Due Period a portion of
the Trust Assets, including all collections of Receivables and all Defaulted
Receivables based on the Series Allocation Percentage as described under
"Master Trust Provisions--Allocations among Series". The Servicer will then
allocate amounts initially allocated to a particular Series between the
Certificateholders' Interest and the Banks' Interest for such Due Period as
follows:
 
    (i) during the Revolving Period and any Early Amortization Period, Series
  Allocable Finance Charge Collections will be allocated to Investor
  Certificateholders based on the Floating Allocation Percentage;
 
                                      31
<PAGE>
 
    (ii) during the Accumulation Period, the Gross Amount will be allocated
  to Investor Certificateholders in an amount generally equal to the sum of
  (a) the Floating Allocation Percentage of Series Allocable Finance Charge
  Collections and (b) the amount of any Class A Funding Account Shortfall
  (the amounts so allocated pursuant to clauses (i) above and (ii)(a) above,
  minus the aggregate amount of Servicer Interchange for the related Due
  Period, are referred to herein as "Investor Finance Charges");
 
    (iii) Series Allocable Defaulted Receivables will at all times be
  allocated to Investor Certificateholders based on the Floating Allocation
  Percentage;
 
    (iv) during the Revolving Period, Series Allocable Principal Collections
  will be allocated to Investor Certificateholders based on the Floating
  Allocation Percentage;
 
    (v) during the Accumulation Period and any Early Amortization Period,
  Series Allocable Principal Collections will be allocated to Investor
  Certificateholders based on the Principal Allocation Percentage; and
 
    (vi) Series Allocable Miscellaneous Payments will at all times be
  allocated to Investor Certificateholders (the amounts allocated under
  clauses (iv), (v) and (vi) for any Due Period are referred to herein as
  "Investor Principal Collections").
 
  Amounts not allocated to Investor Certificateholders as described above
  will be allocated to the Banks.
 
    "Floating Allocation Percentage" for each Due Period is the percentage
  equivalent (which shall not be in excess of 100%) of the ratio which the
  sum of the Invested Amount and the Enhancement Invested Amount, if any,
  bears to the product of (a) the Series Allocation Percentage and (b) the
  total amount of Principal Receivables, in each case determined as of the
  date provided in the related Series Supplement; provided, however, that,
  with respect to any Due Period in which a Lump Sum Addition or removal of
  Accounts occurs, the amount referred to in clause (b) for such Due Period
  shall be a weighted average amount of Principal Receivables in the Trust
  for such Due Period. During the initial Due Period with respect to the
  Investor Certificates, the Floating Allocation Percentage will equal the
  percentage equivalent of the ratio which the amount of the initial Invested
  Amount bears to the product of (x) the Series Allocation Percentage and (y)
  the total amount of Principal Receivables on the Series Cut-Off Date.
 
    "Invested Amount" means the sum of the Class A Invested Amount and the
  Class B Invested Amount.
 
    "Class A Invested Amount" for any date means an amount equal to (a) the
  initial principal balance of the Class A Certificates (increased by the
  initial principal balance of any Class A Certificates issued after the
  Series Issuance Date), minus (b) the amount of principal payments made to
  Class A Certificateholders prior to such date, minus (c) the Class A
  Principal Funding Account Balance as of such date, and minus (d) the
  excess, if any, of the aggregate amount of Class A Investor Charge-Offs for
  all Distribution Dates preceding such date over the aggregate amount of
  Class A Investor Charge-Offs reimbursed prior to such date.
 
    "Class B Invested Amount" for any date means an amount equal to (a) the
  initial principal balance of the Class B Certificates (increased by the
  initial principal balance of any Class B Certificates issued after the
  Series Issuance Date), minus (b) the amount of principal payments made to
  Class B Certificateholders prior to such date (other than principal
  payments made from the proceeds of a draw under the Credit Enhancement for
  the purpose of reimbursing previous reductions in the Class B Invested
  Amount), minus (c) the aggregate amount of Class B Investor Charge-Offs for
  all prior Distribution Dates, minus (d) the portion of the aggregate amount
  of Subordinated Principal Collections for all prior Distribution Dates
  which has been used to fund the Required Amount with respect to such
  Distribution Dates and which is allocable to the Class B Certificates as
  described under "--Allocations, Reallocations and Subordination Within a
  Series--Subordination", minus (e) an amount equal to the aggregate amount
  by which the Class B Invested Amount has been reduced to fund the Class A
  Investor Default Amount on all prior Distribution Dates as described under
  "--Investor Charge-Offs", and plus (f) the aggregate amount of Excess
  Finance Charge Collections and certain other amounts applied on all prior
  Distribution Dates for the purpose of reimbursing amounts deducted pursuant
  to the foregoing clauses (c), (d) and (e).
 
 
                                      32
<PAGE>
 
    "Enhancement Invested Amount" for any date means an amount equal to (a)
  the aggregate amount drawn under the Credit Enhancement and applied to the
  payment of principal of the Investor Certificates on the first Special
  Payment Date following an Economic Early Amortization Event, minus (b) an
  amount equal to the aggregate amount by which the Enhancement Invested
  Amount has been reduced as a result of Subordinated Principal Collections
  for prior Distribution Dates having been used to fund the Required Amount
  with respect to such Distribution Dates as described under "--Allocations,
  Reallocations and Subordination Within a Series--Subordination", minus (c)
  an amount equal to the aggregate amount by which the Enhancement Invested
  Amount has been reduced to fund the Class A Investor Default Amount and the
  Class B Investor Default Amount on all prior Distribution Dates as
  described under "--Investor Charge-Offs", and plus (d) the aggregate amount
  of Excess Finance Charge Collections and certain other amounts applied on
  all prior Distribution Dates for the purpose of reimbursing amounts
  deducted pursuant to the foregoing clauses (b) and (c). In the absence of
  the occurrence of an Economic Early Amortization Event and a related draw
  under the Credit Enhancement to pay principal of the Investor Certificates,
  the Enhancement Invested Amount will be zero.
 
    "Principal Allocation Percentage" means, for each Due Period with respect
  to the Accumulation Period or any Early Amortization Period, the percentage
  equivalent (which shall not be in excess of 100%) of the ratio which the
  Invested Amount on the last day of the Revolving Period (which last day, in
  the case of an Early Amortization Period which commences prior to the
  scheduled end of the Revolving Period, will be the day preceding the day on
  which an Early Amortization Event occurs) bears to the product of (a) the
  Series Allocation Percentage and (b) the total amount of Principal
  Receivables on the last day of the immediately preceding Due Period;
  provided, however, that, if a Lump Sum Addition or removal of Accounts
  occurs during such Due Period, the amount referred to in clause (b) for
  such Due Period shall be a weighted average amount of Principal Receivables
  in the Trust for such Due Period.
 
    "Gross Amount" means, for any Distribution Date with respect to the
  Accumulation Period, the sum of (a) Series Allocable Finance Charge
  Collections and (b) Class A Excess Investment Proceeds for such
  Distribution Date.
 
    "Series Cut-Off Date" has the meaning specified in the related Prospectus
  Supplement.
 
 Reallocations Among Investor Certificates of Different Series
 
 Group One Investor Finance Charges
 
  The Series offered hereby may be included in Group One or in another Group.
See "Annex I--Prior Issuances of Investor Certificates" in the related
Prospectus Supplement for a summary of other outstanding Series included in
Group One. Other Series issued in the future may also be included in Group
One. The following description of reallocations applies to those Series in
Group One. Reallocations with respect to Series in other Groups will be done
in the same manner or in any other manner set forth in the Prospectus
Supplement.
 
  Unless otherwise specified in the related Prospectus Supplement, the
Servicer will calculate for each Due Period Group One Investor Finance Charges
and on the following Distribution Date shall allocate such amount among the
Certificateholders' Interest and the certificateholders' interest for all
other Series in Group One in the following priority:
 
    (i) Group One Investor Monthly Interest;
 
    (ii) Group One Investor Default Amounts;
 
    (iii) Group One Investor Monthly Fees;
 
    (iv) Group One Investor Additional Amounts; and
 
    (v) the balance pro rata among each Series in Group One based on the
  current invested amount of each such Series (which will include any
  enhancement invested amount with respect to a Series).
 
                                      33
<PAGE>
 
  In the case of clauses (i), (ii), (iii) and (iv), if the amount of Group One
Investor Finance Charges is not sufficient to cover each such amount in full,
the amount available will be allocated among the Series in Group One pro rata
based on the claim that each Series has under the applicable clause. This
means, for example, that if the amount of Group One Investor Finance Charges
is not sufficient to cover Group One Investor Monthly Interest, each Series in
Group One will share such amount pro rata and any Series with a claim with
respect to monthly interest, overdue monthly interest and interest on such
overdue monthly interest, if applicable, which is larger than the claim for
such amounts for the Series offered hereby (due to a higher certificate rate)
will receive a proportionately larger allocation.
 
  The amount of Group One Investor Finance Charges allocated to the
Certificateholders' Interest for the Series offered hereby as described above
is referred to herein as "Reallocated Investor Finance Charges".
 
    "Group One Investor Additional Amounts" means for any Distribution Date
  the sum of (a) with respect to the Investor Certificates, generally the
  amounts set forth in clauses (b), (c), (f) and (h) under "--Allocations,
  Reallocations and Subordination Within a Series--Excess Finance Charge
  Collections" below and (b) with respect to any other Series in Group One,
  (i) an amount equal to the amount by which the invested amount of any class
  of investor certificates has been reduced as a result of investor charge-
  offs, subordination of principal collections and funding the investor
  default amount for any other class of investor certificates of such Series
  and (ii) if the related Supplement so provides, the amount of interest at
  the applicable certificate rate that has accrued on the amount described in
  the preceding clause (i).
 
    "Group One Investor Default Amount" means for any Distribution Date the
  sum of (a) with respect to the Investor Certificates, the product of Series
  Allocable Defaulted Receivables for such Distribution Date and the Floating
  Allocation Percentage for such Distribution Date and (b) with respect to
  any other Series in Group One, the product of (i) series allocable
  defaulted receivables for each such Series for such Distribution Date and
  (ii) the floating allocation percentage of each such Series for such
  Distribution Date.
 
    "Group One Investor Finance Charges" means for any Distribution Date the
  sum of (a) the aggregate amount of Investor Finance Charges for such
  Distribution Date and (b) the aggregate amount of investor finance charges
  for such Distribution Date for all other Series in Group One.
 
    "Group One Investor Monthly Fees" means for any Distribution Date the sum
  of (a) the Class A Monthly Servicing Fee, the Class B Monthly Servicing
  Fee, the Monthly Credit Enhancement Fee and, as applicable, the Class A
  Investment Fee and (b) the portion of the servicing fee allocable to the
  investor certificates of each other Series in Group One, any investment
  fees for such Series, any Series Enhancement fees and any other similar
  fees which are paid out of reallocated investor finance charges for such
  Series pursuant to the applicable Supplement.
 
    "Group One Investor Monthly Interest" means for any Distribution Date the
  sum of (a) Class A Monthly Interest for such Distribution Date, plus the
  amount of any Class A Monthly Interest previously due but not deposited
  into the Class A Interest Funding Account on a prior Distribution Date,
  plus any additional interest with respect to interest amounts that were due
  but not paid on a prior Payment Date, plus Class B Monthly Interest for
  such Distribution Date, plus the amount of any Class B Monthly Interest
  previously due but not deposited into the Class B Interest Funding Account
  on a prior Distribution Date, plus any additional interest with respect to
  interest amounts that were due but not paid on a prior Payment Date, plus
  the amount, if any, of interest accrued on the Enhancement Invested Amount
  (at a rate for any period equal to the weighted average for such period of
  the Class A Certificate Rate and the Class B Certificate Rate), and (b) the
  aggregate amount of monthly interest, including overdue monthly interest
  and interest on such overdue monthly interest, if applicable, for all other
  Series in Group One for such Distribution Date.
 
  The chart below demonstrates the manner in which collections of Finance
Charge Receivables are allocated and reallocated among Series in Group One.
The chart assumes that the Trust has issued three Series (Series 98-1, 98-2
and 98-3) and that each such Series is in its Revolving Period. However, the
Trust previously has issued other Series in Group One and there is no limit to
the number of Series which may be included in Group One or in any other Group.
 
 
                                      34
<PAGE>
 
  In Step 1, total collections of Finance Charge Receivables are allocated
among the three Series based on the Series Allocation Percentage for each
Series. The amount allocated to each Series pursuant to Step 1 is referred to
as "Series Allocable Finance Charge Collections". See "Master Trust
Provisions--Allocations among Series".
 
  In Step 2, the amount of Finance Charge Collections allocable to the
investor certificates of a Series (or Investor Finance Charges) is determined
by (a) multiplying Series Allocable Finance Charge Collections for each Series
by the Floating Allocation Percentage and (b) subtracting any Servicer
Interchange. See "Allocation Between Investor Certificateholders and the
Banks" and see also "--Group One Investor Finance Charges".
 
  Investor Finance Charges for all Series in the Group (or Group One Investor
Finance Charges) are pooled as shown in Step 3 for reallocation to each such
Series as shown in Step 4. In Step 4, Group One Investor Finance Charges are
reallocated to each Series in Group One as described above based on the
Series' respective claim with respect to interest payable on the investor
certificates of such Series, the investor default amounts and the servicing
fee and certain other amounts in respect of such Series. The excess is
allocated pro rata among the Series based on their respective invested
amounts.
 
                                      35
<PAGE>
 
 
                      Citibank Credit Card Master Trust I
                           Finance Charge Collections
 
 
- ------------------------------------------------------------------------------
 
    Series 1998-1                 Series 1998-2         Series 1998-3
        Series                        Series                Series
      Allocable                     Allocable             Allocable
    Finance Charge                Finance Charge        Finance Charge
     Collections                   Collections           Collections
    (based upon the               (based upon the       (based upon the
        Series                        Series                Series
      Allocation                    Allocation            Allocation
     Percentage)                   Percentage)           Percentage)
 
 
 
 ----------------------    ------------------------    ----------------------
              Investor                    Investor                   Investor
              Finance                     Finance                    Finance
  Banks'      Charges        Banks'       Charges        Banks'      Charges
 Finance    (based upon     Finance     (based upon     Finance    (based upon
 Charges        the         Charges         the         Charges        the
              Floating                    Floating                   Floating
             Allocation                  Allocation                 Allocation
            Percentage)                 Percentage)                Percentage)
                                                      
 
          -------------------------------------------------------
                     Group One Investor Finance Charges
          -------------------------------------------------------
 
   Series 98-1                   Series 98-2                Series 98-3 
Investor Monthly Interest  Investor Monthly Interest  Investor Monthly Interest
 
- --------------------------------------------------------------------------------
   Series 98-1                   Series 98-2                Series 98-3 
Investor Default Amount    Investor Default Amount    Investor Default Amount 
 
- --------------------------------------------------------------------------------
                                  
   Series 98-1                   Series 98-2                Series 98-3 
Investor Monthly Fees      Investor Monthly Fees      Investor Monthly Fees
 
- --------------------------------------------------------------------------------

  Series 98-1                    Series 98-2                Series 98-3 
Investor Additional Amounts  Investor Additional Amounts  Investor Additional 
                                                              Amounts 
                                                          
                                  
- --------------------------------------------------------------------------------

  Series 98-1              Series 98-2                       Series 98-3  
 Balance based upon     Balance based upon               Balance based upon 
  Invested Amount        Invested Amount                 Invested Amount
 
 
                                       36
<PAGE>

 
 Investor Principal Collections for all Series
 
  Investor Principal Collections for any Due Period will first be allocated to
cover Subordinated Principal Collections to the extent necessary to fund the
Required Amount, if any, for such Due Period and, with respect to the
Accumulation Period, required deposits to the Class A Principal Funding
Account or payments to the Class B Certificateholders or, with respect to any
Early Amortization Period, payments to the Investor Certificateholders and,
following the payment in full of the Investor Certificates, to the Credit
Enhancer to the extent of the Enhancement Invested Amount, if any. See "--
Allocations, Reallocations and Subordination Within a Series--Subordination"
and "--Class A and Class B Investor Principal Collections". The Servicer will
determine the amount of Investor Principal Collections for any Due Period
(plus certain other amounts described under "--Allocations, Reallocations and
Subordination Within a Series--Class A and Class B Investor Principal
Collections") remaining after such required payments and deposits and the
amount of any similar excess for any other Series ("Excess Principal
Collections"). The Servicer will allocate the Excess Principal Collections to
cover any principal distributions to investor certificateholders and deposits
to principal funding accounts for any Series which are either scheduled or
permitted and which have not been covered out of the investor principal
collections and certain other amounts for such Series ("Principal
Shortfalls"). Excess Principal Collections will generally not be used to cover
investor charge-offs for any Series. If Principal Shortfalls exceed Excess
Principal Collections for any Due Period, Excess Principal Collections will be
allocated pro rata among the applicable Series based on the relative amounts
of Principal Shortfalls; provided that in such allocation all other Series
will have priority over any Series whose terms permit the Servicer to extend
the initial principal payment date, and then only to the extent that the
principal shortfall for such Series is greater than such principal shortfall
would otherwise have been due to the election by the Servicer not to extend
the initial principal payment date. To the extent that Excess Principal
Collections exceed Principal Shortfalls, the balance will be allocated to the
Banks, unless the Banks' Interest in Principal Receivables at such time (after
giving effect to any new Receivables transferred to the Trust) is zero. Any
amount not allocated to the Banks because their interest in Principal
Receivables is zero will be held unallocated ("Unallocated Principal
Collections") until the Banks' Interest in Principal Receivables is greater
than zero (at which time such amount will be allocated to the Banks) or until
an early amortization event occurs or an accumulation period (or amortization
period, if applicable) commences for any Series (after which such amount will
be treated as a Series Allocable Miscellaneous Payment).
 
 Allocations, Reallocations and Subordination Within a Series
 
 Class A and Class B Investor Finance Charges
 
  The Servicer will allocate all Reallocated Investor Finance Charges for each
Distribution Date to the Class A Interest and the Class B Interest pro rata
based on their relative Invested Amounts as of the end of the second preceding
Due Period. In addition, (i) any payment received by the Trustee with respect
to any interest rate cap agreement or interest rate swap agreement established
for the benefit of the Class A Certificates or the Class B Certificates will
be allocated to the Class A Interest or the Class B Interest, as applicable,
and (ii) for each Distribution Date with respect to the Accumulation Period,
the Servicer will allocate that portion of the Gross Amount equal to any Class
A Funding Account Shortfall to the Class A Interest.
 
  (a) The amounts allocated to the Class A Interest as described above will be
further allocated in the following priority; provided, however, that if the
funds available therefor are less than the sum of the amounts specified in
clauses (i), (ii) and (iii) below, such funds will be allocated among such
clauses in proportion to the respective amounts specified in each such clause
and, provided, further, that funds allocated to the Class A Certificateholders
pursuant to clauses (a)(i) and (ii) below will be applied first to the amount
specified under clause (a)(i) below and second to the amount specified under
clause (a)(ii) below:
 
    (i)(A) an amount equal to Class A Monthly Interest for such Distribution
  Date, plus the amount of any Class A Monthly Interest previously due but
  not deposited into the Class A Interest Funding Account on a prior
  Distribution Date, plus any additional interest with respect to interest
  amounts that were due but not paid on a prior Interest Payment Date or
  Special Payment Date at the applicable certificate rate, plus an amount
  equal to any Class A Funding Account Shortfall for such Distribution Date,
  plus the amount of any
 
                                      37
<PAGE>
 
  Class A Funding Account Shortfall previously due but not deposited into the
  Class A Interest Funding Account on a prior Distribution Date, will be
  allocated to the Class A Interest Funding Account, and (B) if the Class A
  Certificates have the benefit of one or more interest rate swap agreements,
  the Class A Net Swap Payment, if any, with respect to such Distribution
  Date, plus any Class A Net Swap Payments previously due but not paid will
  be allocated to the related swap counterparty or counterparties, as
  applicable; provided, however, if the funds available therefor are less
  than the sum of the amounts specified in subclauses (i)(A) and (i)(B), such
  funds will be allocated between such subclauses in proportion to the
  respective amounts in each such subclause;
 
    (ii) an amount equal to the aggregate Class A Investor Default Amount for
  such Distribution Date will be allocated in the same manner as Investor
  Principal Collections for such Distribution Date;
 
    (iii) an amount equal to the Class A Monthly Servicing Fee for such
  Distribution Date will be allocated to the Servicer;
 
    (iv) during the originally scheduled Accumulation Period, an amount equal
  to any Class A Investment Fee for such Distribution Date will be allocated
  to the Banks; and
 
    (v) the balance, if any, will constitute a portion of Excess Finance
  Charge Collections for such Distribution Date and will be allocated as
  described under "--Excess Finance Charge Collections" below.
 
  (b) The amounts allocated to the Class B Interest as described above will be
further allocated in the following priority; provided, however, that if the
funds available therefor are less than the sum of the amounts specified in
clauses (i) and (ii) below, such funds will be allocated between such clauses
in proportion to the respective amounts specified in each such clause:
 
    (i) (A) an amount equal to Class B Monthly Interest for such Distribution
  Date, plus the amount of any Class B Monthly Interest previously due but
  not deposited into the Class B Interest Funding Account on a prior
  Distribution Date, plus any additional interest with respect to interest
  amounts that were due but not paid on a prior Interest Payment Date or
  Special Payment Date at the applicable certificate rate, will be allocated
  to the Class B Interest Funding Account, and (B) if the Class B
  Certificateholders have the benefit of one or more interest rate swap
  agreements, the Class B Net Swap Payment, if any, with respect to such
  Distribution Date, plus any Class B Net Swap Payments previously due but
  not paid will be allocated to the related swap counterparty or
  counterparties, as applicable; provided, however, if the funds available
  therefor are less than the sum of the amounts specified in subclauses (i)
  (A) and (i) (B), such funds will be allocated between such subclauses in
  proportion to the respective amounts in each such subclause;
 
    (ii) an amount equal to the Class B Monthly Servicing Fee for such
  Distribution Date will be allocated to the Servicer; and
 
    (iii) the balance, if any, will constitute a portion of Excess Finance
  Charge Collections for such Distribution Date and will be allocated as
  described under "--Excess Finance Charge Collections" below.
 
  "Class A Funding Account Payment" means, with respect to any Distribution
Date, the product of the Class A Net Swap Payment for such Distribution Date
and a fraction, the numerator of which is the Class A Principal Funding
Account Balance as of the close of business on the preceding Distribution Date
and the denominator of which is the outstanding principal amount of the Class
A Certificates as of the close of business on the preceding Distribution Date.
 
  "Class A Funding Account Receipt" means, with respect to any Distribution
Date, the product of the Class A Net Swap Receipt or the Class A Net Cap
Receipt for such Distribution Date, as applicable, and a fraction, the
numerator of which is the Class A Principal Funding Account Balance as of the
close of business on the preceding Distribution Date and the denominator of
which is the outstanding principal amount of the Class A Certificates as of
the close of business on the preceding Distribution Date.
 
  "Class A Investment Fee" means a fee payable to the Banks on each
Distribution Date with respect to the originally scheduled Accumulation
Period, commencing on the second such Distribution Date, initially equal to
the amount specified in the related Prospectus Supplement and declining for
each Distribution Date thereafter.
 
                                      38
<PAGE>
 
  "Class A Investor Default Amount" means, with respect to any Distribution
Date, the product of (a) the Floating Allocation Percentage of Series
Allocable Defaulted Receivables for such Distribution Date and (b) a fraction,
the numerator of which is equal to the Class A Invested Amount as of the last
day of the second preceding Due Period and the denominator of which is equal
to the Invested Amount as of such last day.
 
  "Class A Monthly Interest" has the meaning specified in the related
Prospectus Supplement.
 
  "Class A Net Cap Receipt", if applicable, has the meaning specified in the
related Prospectus Supplement.
 
  "Class A Net Swap Payment", if applicable, has the meaning specified in the
related Prospectus Supplement.
 
  "Class A Net Swap Receipt", if applicable, has the meaning specified in the
related Prospectus Supplement.
 
  "Class B Investor Default Amount" means, with respect to any Distribution
Date, the product of (a) the Floating Allocation Percentage of the Series
Allocable Defaulted Receivables for such Distribution Date and (b) a fraction,
the numerator of which is equal to the Class B Invested Amount as of the last
day of the second preceding Due Period and the denominator of which is equal
to the Invested Amount as of such last day.
 
  "Class B Monthly Interest" has the meaning specified in the related
Prospectus Supplement.
 
  "Class B Net Swap Payment", if applicable, has the meaning specified in the
related Prospectus Supplement.
 
  "Interest Calculation Date" means each Distribution Date (or, if Interest
Payment Dates are not Distribution Dates, the fifteenth day of the relevant
calendar month or, if such day is not a business day, the next succeeding
business day).
 
  "Interest Payment Date", with respect to a class of Investor Certificates,
has the meaning specified in the related Prospectus Supplement.
 
  "Interest Period" means, with respect to a Payment Date for a class of
Investor Certificates, a period from and including the preceding Payment Date
with respect to such class to but excluding such Payment Date; provided,
however, that the first Interest Period with respect to a class of Investor
Certificates will commence on the related Series Issuance Date.
 
  "Payment Date" means, with respect to a class of Investor Certificates, each
Interest Payment Date with respect to such class and each Special Payment
Date.
 
  "Special Payment Date" means each Distribution Date with respect to any
Early Amortization Period (or, if Interest Payment Dates are not Distribution
Dates, the fifteenth day of each calendar month (or, if such day is not a
Business Day, the next succeeding Business Day) with respect to any Early
Amortization Period, provided that in such case the first Special Payment Date
shall occur in the Due Period following the Due Period in which the related
Early Amortization Event is deemed to have occurred).
 
  "Excess Finance Charge Collections" means, with respect to any Distribution
Date, an amount equal to the sum of the amounts described in clauses (a)(v)
and (b)(iii) above.
 
 Excess Finance Charge Collections
 
  For each Distribution Date, the Servicer will allocate Excess Finance Charge
Collections with respect to the Due Period immediately preceding such
Distribution Date, in the following priority:
 
    (a) an amount equal to the Required Amount, if any, with respect to such
  Due Period will be used to fund the Required Amount;
 
                                      39
<PAGE>
 
    (b) an amount equal to the aggregate amount of Class A Investor Charge-
  Offs which have not been previously reimbursed (after giving effect to the
  allocation on such Distribution Date of Series Allocable Miscellaneous
  Payments with respect to such Distribution Date) will be allocated in the
  same manner as Investor Principal Collections for such Distribution Date;
 
    (c) (i) an amount equal to interest which has accrued with respect to the
  outstanding aggregate principal amount of the Class B Certificates at the
  Class B Certificate Rate but has not been deposited into the Class B
  Interest Funding Account either on such Distribution Date or on a prior
  Distribution Date will be allocated to the Class B Interest Funding
  Account, and (ii) if the Class B Certificateholders have the benefit of one
  or more interest rate swap agreements, an amount equal to the Class B Net
  Swap Payments due, but which has not paid, with respect to such
  Distribution Date and prior Distribution Dates will be allocated to the
  related swap counterparty or swap counterparties, as applicable; provided,
  however, if the funds available therefor are less than the sum of the
  amounts specified in the subclauses (c) (i) and (c) (ii), such funds will
  be allocated between such subclauses in proportion to the respective
  amounts in each such subclause;
 
    (d) an amount equal to the interest which has accrued at the Class B
  Certificate Rate on any interest due but not paid to Class B
  Certificateholders on any previous Interest Payment Date or Special Payment
  Date will be allocated to the Class B Interest Funding Account;
 
    (e) an amount equal to the aggregate Class B Investor Default Amount for
  such Distribution Date will be allocated in the same manner as Investor
  Principal Collections for such Distribution Date;
 
    (f) an amount equal to the aggregate amount by which the Class B Invested
  Amount has been reduced pursuant to clauses (c), (d) and (e) of the
  definition of "Class B Invested Amount" (but not in excess of the aggregate
  amount of such reductions which have not been previously reimbursed) will
  be allocated in the same manner as Investor Principal Collections for such
  Distribution Date;
 
    (g) an amount equal to the monthly credit enhancement fee (the "Monthly
  Credit Enhancement Fee") for such Distribution Date (as defined in the
  agreement (the "Credit Enhancement Agreement") among the Banks, the
  providers of Credit Enhancement and the Trustee) will be allocated to the
  Credit Enhancer;
 
    (h) an amount equal to the aggregate amount by which the Enhancement
  Invested Amount has been reduced pursuant to clauses (b) and (c) of the
  definition of "Enhancement Invested Amount" (but not in excess of the
  aggregate amount of such reductions which have not been previously
  reimbursed) will be allocated in the same manner as Investor Principal
  Collections for such Distribution Date;
 
    (i) prior to the date on which the Credit Enhancement terminates (as
  described under "--Series Enhancements--Credit Enhancement Generally"), an
  amount up to the excess of the Initial Enhancement Amount over the
  Available Enhancement Amount will be used to increase the Available
  Enhancement Amount (up to the Initial Enhancement Amount); and
 
    (j) the balance, if any, will be allocated to the providers of Credit
  Enhancement for application in accordance with the provisions of the Credit
  Enhancement Agreement.
 
 Subordination
 
  The fractional undivided interest in the Trust represented by the Class B
Certificates will be subordinated to the extent described herein to fund
payments with respect to the Class A Certificates. The Class B Invested Amount
represents the Class B Certificateholders' allocable interest in the Trust
Assets and represents the subordinated amount which, in addition to the
Available Shared Enhancement Amount, is available to fund payments with
respect to the Class A Certificates. See "--Series Enhancements".
 
  On each Determination Date (or, if the Class A Certificates have the benefit
of one or more interest rate cap agreements or interest rate swap agreements,
on such later date as is necessary to enable the Servicer to take account of
any payment to be made by a cap provider or a swap counterparty, as the case
may be, pursuant to such agreement), the Servicer will determine the amount of
any deficiency between (A) the sum of (a) the amount of Reallocated Investor
Finance Charges allocated to the Class A Interest, plus (b) if applicable, the
amount of
 
                                      40
<PAGE>
 
any payment made by any such provider or counterparty to the Trust for the
benefit of the Class A Certificateholders pursuant to any such interest rate
cap agreement or interest rate swap agreement with respect to the following
Distribution Date (but excluding from such payments the amount of any Class A
Funding Account Receipt received by the Trust), minus (c) if Citibank (South
Dakota) or an affiliate thereof is the Servicer, the amount paid pursuant to
clause (a)(iii) of the first paragraph under the preceding caption "Class A
and Class B Investor Finance Charges" and (B) the amount needed to cover the
sum of (a) amounts described in clauses (a) (i) and (ii) of the first
paragraph under the preceding caption "Class A and Class B Investor Finance
Charges" (but not including any Class A Funding Account Shortfall or any
applicable Class A Funding Account Payment), plus (b) if Citibank (South
Dakota) or an affiliate thereof is no longer the Servicer, the Class A Monthly
Servicing Fee (the amount of such deficiency being herein referred to as the
"Required Amount"). If the Required Amount is greater than zero, Excess
Finance Charge Collections for the related Distribution Date will be allocated
to the Required Amount with respect to such Distribution Date. If Excess
Finance Charge Collections with respect to such Distribution Date are less
than the Required Amount, a draw will be made under the Credit Enhancement in
an amount up to the lesser of (a) the Available Shared Enhancement Amount on
such Distribution Date and (b) such shortfall. If the Available Shared
Enhancement Amount on such Distribution Date is not sufficient to fund such
shortfall, an amount up to the product of (a) the Floating Allocation
Percentage, with respect to the Revolving Period, or the Principal Allocation
Percentage, with respect to the Accumulation Period or any Early Amortization
Period, of Series Allocable Principal Collections for such Due Period and (b)
a fraction, the numerator of which is equal to the Class B Invested Amount as
of the close of business on the last day of the second preceding Due Period
and the denominator of which is equal to the Invested Amount at the close of
business on such day, will then be allocated to fund the remaining Required
Amount. The portion of Series Allocable Principal Collections determined in
accordance with the preceding sentence is herein referred to as "Subordinated
Principal Collections". The Enhancement Invested Amount, if any, will be
reduced by the amount of Subordinated Principal Collections allocated to fund
the Required Amount. In the event that such reduction would cause the
Enhancement Invested Amount to be a negative number, the Enhancement Invested
Amount will be reduced to zero, and the Class B Invested Amount will be
reduced by the amount by which the Enhancement Invested Amount would have been
reduced below zero. However, in the absence of the occurrence of an Economic
Early Amortization Event and a related draw under the Credit Enhancement to
pay principal of the Investor Certificates, the Enhancement Invested Amount
will be zero.
 
  If Subordinated Principal Collections with respect to any Due Period are
insufficient to fund the remaining Required Amount for such Due Period, then a
portion of the Enhancement Invested Amount, if any, equal to such
insufficiency (but not in excess of the Class A Investor Default Amount for
such Due Period) will be allocated to the Class A Certificates and the
Enhancement Invested Amount will be reduced by the amount so allocated. In the
event that such allocation would cause the Enhancement Invested Amount to be a
negative number, the Enhancement Invested Amount will be reduced to zero, and
the Class B Invested Amount will be reduced by the amount by which the
Enhancement Invested Amount would have been reduced below zero (but not by
more than the excess, if any, of the Class A Investor Default Amount for such
Due Period over the amount of such reduction, if any, of the Enhancement
Invested Amount with respect to such Due Period).
 
  Such reductions of the Class B Invested Amount shall thereafter be
reimbursed and the Class B Invested Amount increased (but not by an amount in
excess of the aggregate reductions of the Class B Invested Amount) on each
Distribution Date by the sum of (a) Series Allocable Miscellaneous Payments
with respect to such Distribution Date (but only to the extent such amount is
not required to reimburse Class A Investor Charge-Offs with respect to such
Distribution Date) and (b) Excess Finance Charge Collections for such
Distribution Date allocated and available for that purpose. See "--Investor
Charge-Offs". In addition, any such reductions of the Enhancement Invested
Amount shall thereafter be reimbursed and the Enhancement Invested Amount
increased (but not by an amount in excess of the aggregate reductions of the
Enhancement Invested Amount) on each Distribution Date by the sum of (a)
Series Allocable Miscellaneous Payments (but only to the extent such amounts
are not required to reimburse Class A Investor Charge-Offs or Class B Investor
Charge-Offs) and (b) Excess Finance Charge Collections for such Distribution
Date allocated and available for that purpose.
 
 
                                      41
<PAGE>
 
  To the extent the Class B Invested Amount is decreased, the portion of
Reallocated Investor Finance Charges allocated to the Class B
Certificateholders in subsequent Due Periods will be reduced. Moreover, to the
extent the amount of such decrease in the Class B Invested Amount is not
reimbursed, the amount of principal distributable to the Class B
Certificateholders will be reduced. If the Class B Invested Amount is reduced
to zero, the Class A Invested Amount will be reduced if the Required Amount
for any Due Period exceeds the sum of Excess Finance Charge Collections, the
Available Shared Enhancement Amount and Subordinated Principal Collections for
such Due Period, but not in excess of the Class A Investor Default Amount for
such Due Period, and the Class A Certificateholders will bear directly the
credit and other risks associated with their undivided interest in the Trust.
Class A Investor Charge-Offs will thereafter be reimbursed and the Class A
Invested Amount increased (but not by an amount in excess of the aggregate
Class A Investor Charge-Offs) on any Distribution Date by the sum of (a)
Series Allocable Miscellaneous Payments with respect to such Distribution Date
and (b) the amount of Excess Finance Charge Collections allocated and
available for that purpose. See "--Investor Charge-Offs".
 
 Class A and Class B Investor Principal Collections
 
  On each Distribution Date, the Servicer will allocate the sum of Investor
Principal Collections (other than Subordinated Principal Collections used to
fund any amounts other than the Class A Investor Default Amount), Excess
Principal Collections, if any, from other Series allocated to the Investor
Certificates and any reallocated amounts described in the preceding paragraphs
which are to be allocated as Investor Principal Collections, in each case for
the preceding Due Period (collectively, the "Available Investor Principal
Collections" for such Distribution Date), and will allocate such amounts as
follows:
 
    (a) For each Distribution Date with respect to the Revolving Period, all
  Available Investor Principal Collections will be allocated to Excess
  Principal Collections (see "--Reallocations Among Investor Certificates of
  Different Series--Investor Principal Collections for all Series");
 
    (b) For each Distribution Date with respect to the Accumulation Period or
  any Early Amortization Period, all Available Investor Principal Collections
  will be allocated in the following priority:
 
      (i) an amount equal to Class A Monthly Principal for such
    Distribution Date will be allocated to the Class A Principal Funding
    Account;
 
      (ii) an amount equal to Class B Monthly Principal for such
    Distribution Date will be distributed to the Class B
    Certificateholders;
 
      (iii) an amount up to the Enhancement Invested Amount, if any, will
    be distributed to the Credit Enhancer for application in accordance
    with the provisions of the Credit Enhancement Agreement; and
 
      (iv) the balance, if any, will be allocated to Excess Principal
    Collections.
 
  Principal will not be payable to the Credit Enhancer with respect to the
Enhancement Invested Amount, if any, until the Class A Certificates and the
Class B Certificates have been paid in full.
 
  "Class A Controlled Distribution Amount" for any Distribution Date with
respect to the Accumulation Period means an amount equal to the sum of the
Class A Controlled Amortization Amount and any then-existing Class A Deficit
Controlled Amortization Amount.
 
  "Class A Controlled Amortization Amount" means the amount specified as such
in the related Prospectus Supplement.
 
  "Class A Deficit Controlled Amortization Amount" means, on the first
Distribution Date with respect to the Accumulation Period, the excess, if any,
of the Class A Controlled Amortization Amount over the amount distributed as
Class A Monthly Principal for such Distribution Date and, on each subsequent
Distribution Date with respect to the Accumulation Period, the excess, if any,
of the Class A Controlled Amortization Amount and any then existing Class A
Deficit Controlled Amortization Amount over the Class A Monthly Principal
distributed on such Distribution Date.
 
                                      42
<PAGE>
 
  "Class A Monthly Principal" with respect to any Distribution Date relating
to the Accumulation Period or any Early Amortization Period will equal the
Available Investor Principal Collections for such Distribution Date; provided,
however, that for each Distribution Date with respect to the Accumulation
Period, Class A Monthly Principal may not exceed the Class A Controlled
Distribution Amount for such Distribution Date; and provided further that
Class A Monthly Principal may not exceed the Class A Invested Amount.
 
  "Class B Monthly Principal" with respect to any Distribution Date relating
to the Accumulation Period or any Early Amortization Period, commencing with
the Class B Principal Commencement Date, will equal the Available Investor
Principal Collections for such Distribution Date (minus the portion of such
Available Investor Principal Collections applied to Class A Monthly Principal
on such Distribution Date); provided, however, that the Class B Monthly
Principal may not exceed the Class B Invested Amount.
 
  "Class B Principal Commencement Date" means the Distribution Date on which
the Class A Invested Amount is paid in full or, if the Class A Invested Amount
is paid in full on the Class A Expected Final Payment Date and an Early
Amortization Period has not commenced, the Class B Expected Final Payment Date
(or, if Interest Payment Dates are not Distribution Dates, the Distribution
Date immediately preceding the Payment Date on which the Class A Invested
Amount is paid in full or, if the Class A Invested Amount is paid in full on
the Class A Expected Final Payment Date and an Early Amortization Period has
not commenced, the Distribution Date following the Class A Expected Final
Payment Date).
 
PRINCIPAL FUNDING ACCOUNT
 
  The Servicer will establish and maintain in the name of the Trustee, on
behalf of the Trust, an Eligible Deposit Account for the benefit of the Class
A Certificateholders (the "Class A Principal Funding Account"). Class A
Monthly Principal will be deposited in the Class A Principal Funding Account
as described above under "--Principal".
 
  Provided that an Early Amortization Event has not occurred, all amounts on
deposit in the Class A Principal Funding Account (the "Class A Principal
Funding Account Balance") on any Distribution Date (after giving effect to
distributions to be made on such Distribution Date) will be invested from the
date of deposit to the Class A Expected Final Payment Date by the Trustee at
the direction of the Servicer in Eligible Investments. On each Distribution
Date with respect to the Accumulation Period and on the first Special Payment
Date, if any, thereafter, the interest and other investment income (net of
investment expenses) earned on such investments (the "Class A Investment
Proceeds") up to an amount (the "Class A Covered Amount") equal to the product
of (a) the Class A Certificate Rate (or, if the Class A Certificates have the
benefit of an interest rate cap agreement or interest rate swap agreement and
provided that the cap provider or swap counterparty, as the case may be, has
not defaulted in the performance of its obligations under its agreement on or
prior to such Distribution Date (and, with respect to any interest rate cap
agreement, in the event the Class A Certificate Rate exceeds the cap rate),
the cap rate or swap rate, as the case may be), (b) the Class A Principal
Funding Account Balance and (c) a fraction the numerator of which is the
number of days from and including the prior Interest Calculation Date to but
excluding the succeeding Interest Calculation Date (calculated on the same
basis as the Class A Certificate Rate) and the denominator of which is 360,
will be withdrawn from the Class A Principal Funding Account and deposited
into the Class A Interest Funding Account. The excess, if any, of the Class A
Investment Proceeds over the Class A Covered Amount (the "Class A Excess
Investment Proceeds") will be withdrawn from the Class A Principal Funding
Account on each such Distribution Date and will be included in the Gross
Amount and allocated as described above under "--Allocations, Reallocations
and Subordination--Allocation Between Investor Certificateholders and the
Banks".
 
  For each Distribution Date with respect to the Accumulation Period, a
portion of the Gross Amount generally equal to the sum of (a) the Floating
Allocation Percentage of Series Allocable Finance Charge Collections and (b)
the excess of the Class A Covered Amount over the related Class A Investment
Proceeds (the "Class A Funding Account Shortfall") will be allocated to the
Investor Certificateholders (provided that,
 
                                      43
<PAGE>
 
solely for the purpose of determining Class A Funding Account Shortfall, as
such term is used in clause (a)(i)(A) in "--Allocations, Reallocations and
Subordination--Allocations, Reallocations and Subordination within a Series--
Class A and Class B Investor Finance Charges", Class A Covered Amount will
always be determined with reference to the Class A Certificate Rate). See "--
Allocations, Reallocations and Subordination--Allocation Between Investor
Certificateholders and the Banks".
 
DISTRIBUTIONS
 
  Payments to Class A Certificateholders will be made from the Class A
Interest Funding Account and from the Class A Principal Funding Account (the
"Class A Funding Accounts") and payments to Class B Certificateholders will be
made from the Class B Interest Funding Account and from the Collection
Account. The Servicer shall instruct the Trustee to apply the funds on deposit
in such accounts to make the following distributions:
 
    (a) On each Interest Payment Date with respect to a class of Investor
  Certificates and on each Special Payment Date, all amounts on deposit in
  the Interest Funding Account with respect to such class will be distributed
  to Certificateholders of such class;
 
    (b) On each Special Payment Date, on the Class A Expected Final Payment
  Date and on any other principal payment date provided with respect to a
  particular Series, the Class A Principal Funding Account Balance (and, on
  the first Special Payment Date following an Economic Early Amortization
  Event, the amount, if any, drawn under the Credit Enhancement to pay
  principal of the Class A Certificates) shall be distributed to Class A
  Certificateholders up to a maximum amount on any such date equal to the
  Class A Invested Amount on such date (unless there has been an optional
  repurchase of the Class A Interest due to the failure to find a successor
  Servicer upon a Servicer Default, in which event the foregoing limitation
  shall not apply); and
 
    (c) On each Special Payment Date following the payment in full of the
  Class A Certificates, on the Class B Expected Final Payment Date and on any
  other principal payment date provided with respect to a particular Series,
  the amount to be distributed to Class B Certificateholders as described
  under "--Allocations, Reallocations and Subordination--Allocations,
  Reallocations and Subordination Within a Series--Class A and Class B
  Investor Principal Collections" (and, on the first Special Payment Date
  following an Economic Early Amortization Event, the amount, if any, drawn
  under the Credit Enhancement to pay principal of the Class B Certificates)
  shall be distributed to Class B Certificateholders up to a maximum amount
  on any such date equal to the unpaid principal amount of the Class B
  Certificates on such date (unless there has been an optional repurchase of
  the Class B Interest due to the failure to find a successor Servicer upon a
  Servicer Default, in which event the foregoing limitation shall not apply).
 
  The paying agent (the "Paying Agent") shall initially be Citibank, N.A. The
Paying Agent shall have the revocable power to withdraw funds from such
accounts for the purpose of making distributions to Investor
Certificateholders.
 
DEFAULTED RECEIVABLES; RECOVERIES; REBATES AND FRAUDULENT CHARGES
 
  "Defaulted Receivables" for any Due Period are Principal Receivables which
were charged-off as uncollectible in such Due Period. The amount of Defaulted
Receivables for any Due Period will be an amount (not less than zero) equal to
(a) the amount of the Principal Receivables that were charged-off in such Due
Period less (b) the sum of (i) the amount of any Defaulted Receivables of
which the Banks or the Servicer becomes obligated to accept reassignment or
assignment during such Due Period unless certain events of bankruptcy,
insolvency or receivership have occurred with respect to the Banks or the
Servicer, in which event the amount of such Defaulted Receivables will not be
added to the sum so subtracted, (ii) the aggregate amount of recoveries
received in such Due Period with respect to Principal Receivables previously
charged-off as uncollectible and (iii) the excess, if any, for the immediately
preceding Due Period of the sum computed pursuant to this clause (b) for such
Due Period over the amount of Principal Receivables which became Defaulted
Receivables in such Due Period. Receivables in any Account will be charged-off
as uncollectible in accordance with the Servicer's
 
                                      44
<PAGE>
 
customary and usual policies and procedures for servicing its own comparable
credit card accounts. The current policy of the Servicer is to charge off the
receivables in an account when that account becomes 185 days delinquent or, in
general, if the Servicer receives notice that a cardholder has filed for
bankruptcy or has had a bankruptcy petition filed against it, the Servicer
will charge off the receivables in such account not later than 60 days after
the Servicer receives such notice.
 
  If the Servicer adjusts downward the amount of any Receivable because of a
rebate, refund, unauthorized charge, billing error or certain other noncash
items to a cardholder, or because such Receivable was created in respect of
merchandise which was refused or returned by a cardholder, or if the Servicer
charges off as uncollectible certain small balances, the principal amount of
the Banks' Interest in Principal Receivables will be reduced by the amount of
such adjustment or charge-off. In addition, the principal amount of the Banks'
Interest in Principal Receivables will be reduced by the amount of any
Receivable which was discovered as having been created through a fraudulent or
counterfeit charge or which was subject to certain liens specified in the
Pooling Agreement. After any such reduction in the amount of the Banks'
Interest in Principal Receivables occurs, the amount of such Receivables
described above will be deducted from Principal Receivables used in the
calculation of the principal allocation percentage and the floating allocation
percentage applicable to any Series. Furthermore, to the extent that the
reduction in the amount of the Banks' Interest in Principal Receivables would
reduce such interest below zero, the Banks will deposit into the Collection
Account in immediately available funds an amount equal to the amount by which
the Banks' Interest in Principal Receivables would be reduced below zero (an
"Adjustment Payment") on the Distribution Date following such Due Period.
 
INVESTOR CHARGE-OFFS
 
  On each Distribution Date, if the Required Amount for such Distribution Date
exceeds the sum of Excess Finance Charge Collections, the Available Shared
Enhancement Amount and Subordinated Principal Collections with respect to such
Distribution Date, the Enhancement Invested Amount, if any, will be reduced by
the amount of such excess, but not by more than the Class A Investor Default
Amount for such Distribution Date. In the event that such reduction would
cause the Enhancement Invested Amount to be a negative number, the Enhancement
Invested Amount will be reduced to zero, and the Class B Invested Amount will
be reduced by the amount by which the Enhancement Invested Amount would have
been reduced below zero, but not by more than the excess, if any, of the Class
A Investor Default Amount for such Distribution Date over the amount of such
reduction, if any, of the Enhancement Invested Amount with respect to such
Distribution Date. In the event that such reduction would cause the Class B
Invested Amount to be a negative number, the Class B Invested Amount will be
reduced to zero, and the Class A Invested Amount will be reduced by the amount
by which the Class B Invested Amount would have been reduced below zero, but
not by more than the excess, if any, of the Class A Investor Default Amount
for such Distribution Date over the aggregate amount of the reductions, if
any, of the Enhancement Invested Amount and the Class B Invested Amount with
respect to such Distribution Date as described above (a "Class A Investor
Charge-Off"), which will have the effect of slowing or reducing the return of
principal to the Class A Certificateholders. If the Class A Invested Amount
has been reduced by the amount of any Class A Investor Charge-Offs, it will
thereafter be increased on any Distribution Date (but not by an amount in
excess of the aggregate Class A Investor Charge-Offs) by the sum of (a) Series
Allocable Miscellaneous Payments and (b) the amount of Excess Finance Charge
Collections allocated and available for such purpose as described under "--
Allocations, Reallocations and Subordination--Allocations, Reallocations and
Subordination Within a Series--Excess Finance Charge Collections".
 
  If on any Distribution Date the Class B Investor Default Amount for such
Distribution Date exceeds the amount of Excess Finance Charge Collections
which are allocated and available for such Distribution Date to fund such
amount as described under "--Excess Finance Charge Collections" and the
amount, if any, drawn under the Credit Enhancement to fund such Class B
Investor Default Amount, the Enhancement Invested Amount, if any, will be
reduced by the amount of such excess. In the event that any such reduction
would cause the Enhancement Invested Amount to be a negative number, the
Enhancement Invested Amount will be reduced to zero, and the Class B Invested
Amount will be reduced by the amount by which the Enhancement Invested
 
                                      45
<PAGE>
 
Amount would have been reduced below zero (a "Class B Investor Charge-Off").
The Class B Invested Amount will thereafter be increased (but not by an amount
in excess of the aggregate Class B Investor Charge-Offs) on any Distribution
Date by the sum of (a) Series Allocable Miscellaneous Payments (but only to
the extent such amounts are not required to reimburse Class A Investor Charge-
Offs as described above) and (b) the amount of Excess Finance Charge
Collections allocated and available for such purpose as described under "--
Allocations, Reallocations and Subordination--Allocations, Reallocations and
Subordination Within a Series--Excess Finance Charge Collections".
 
  Any such reductions of the Enhancement Invested Amount shall thereafter be
reimbursed and the Enhancement Invested Amount increased (but not by an amount
in excess of the aggregate reductions of the Enhancement Invested Amount) on
any Distribution Date by the sum of (a) Series Allocable Miscellaneous
Payments (but only to the extent such amounts are not required to reimburse
Class A Investor Charge-Offs or Class B Investor Charge-Offs as described
above) and (b) the amount of Excess Finance Charge Collections allocated and
available for such purpose as described under "--Allocations, Reallocations
and Subordination--Allocations, Reallocations and Subordination Within a
Series--Excess Finance Charge Collections".
 
SERIES ENHANCEMENTS
 
 Credit Enhancement Generally
 
  The credit enhancement with respect to the Investor Certificates (the
"Credit Enhancement") may consist of a cash collateral account (a "Cash
Collateral Account") and/or a letter of credit (an "L/C"), in each case in the
name of the Trustee for the benefit of the Investor Certificateholders, and/or
any other form of credit enhancement described in the related Prospectus
Supplement.
 
  The "Initial Shared Enhancement Amount" (which will be equal to the sum of
the Initial Shared Collateral Amount, if any, and the Initial Shared L/C
Amount, if any, or will otherwise be specified in the related Prospectus
Supplement) will be for the benefit of both the Class A Certificates and the
Class B Certificates, while the "Initial Class B Enhancement Amount" (which
will be equal to the sum of the Initial Class B Collateral Amount, if any, and
the Initial Class B L/C Amount, if any, or will otherwise be specified in the
related Prospectus Supplement) will be for the exclusive benefit of the Class
B Certificates. On each Distribution Date, the "Available Enhancement Amount"
will equal the sum of the Available Cash Collateral Amount, if any, and the
Available L/C Amount, if any, and the "Available Shared Enhancement Amount"
will equal the lesser of (a) the "Initial Shared Enhancement Amount" (which
will be specified in the related Prospectus Supplement) and (b) the excess, if
any, of the Available Enhancement Amount on such Distribution Date over the
Initial Class B Enhancement Amount.
 
  For each Distribution Date, one or more draws will be made under the Credit
Enhancement in an aggregate amount up to the Available Shared Enhancement
Amount on such Distribution Date, to fund the following amounts in the
following priority:
 
    (a) the excess, if any, of the Required Amount with respect to such
  Distribution Date over the amount of Excess Finance Charge Collections
  allocated and available to fund such Required Amount (i) will be deposited
  in the Class A Interest Funding Account up to the portion of the Required
  Amount attributable to interest on the Class A Certificates and (ii) if the
  Class A Certificates have the benefit of one or more interest rate swap
  agreements, payments due the related swap counterparty or counterparties,
  as applicable, will be paid to such swap counterparty or counterparties up
  to the portion of the Required Amount attributable to payments due such
  swap counterparty or counterparties, and the remainder will be allocated in
  the same manner as Investor Principal Collections for such Distribution
  Date;
 
    (b) (i) the excess, if any, of the accrued and unpaid interest on the
  outstanding principal balance of the Class B Certificates (plus any
  interest payable on such unpaid interest) over the amount otherwise to be
  deposited in the Class B Interest Funding Account on such Distribution
  Date, and (ii) if the Class B Certificateholders have the benefit of one or
  more interest rate swap agreements, the excess, if any, of the
 
                                      46
<PAGE>
 
  payments due the related swap counterparty or counterparties, as
  applicable, over the amount otherwise to be paid to such swap counterparty
  or counterparties, will be used to fund any such excess as described in
  clauses (i) and (ii) above; and
 
    (c) the excess, if any, of the Class B Investor Default Amount for such
  Distribution Date over the amount of Excess Finance Charge Collections
  allocated and available to fund such Class B Investor Default Amount will
  be allocated in the same manner as Investor Principal Collections for such
  Distribution Date.
 
  On the first Special Payment Date following an Early Amortization Event
described below in clause (f) or (j) under "--Early Amortization Events"
(each, an "Economic Early Amortization Event"), (a) an amount equal to the
lesser of (i) the Available Shared Enhancement Amount (after giving effect to
any draws under the Credit Enhancement on such date as described above) and
(ii) the unpaid Class A Invested Amount, will be drawn under the Credit
Enhancement and distributed to the Class A Certificateholders as a payment of
principal of the Class A Certificates and (b) an amount equal to the lesser of
(i) the remainder of the Available Enhancement Amount and (ii) the unpaid
principal amount of the Class B Certificates, will be drawn under the Credit
Enhancement and distributed to the Class B Certificateholders as a payment of
principal of the Class B Certificates. Unless otherwise specified in the
Prospectus Supplement, following such draws under the Credit Enhancement on
such Special Payment Date, the Credit Enhancement will be terminated, no
further deposits will be made to the Cash Collateral Account, if any, and, on
subsequent Distribution Dates, any Surplus Finance Charge Collections that
would otherwise have been applied to increase the Available Enhancement Amount
up to the Initial Enhancement Amount (as described under "--Allocations,
Reallocations and Subordination--Allocations, Reallocations and Subordination
Within a Series--Excess Finance Charge Collections"), will instead be applied
in accordance with the terms of any applicable Credit Enhancement Agreement.
 
  On each Distribution Date commencing with the Class B Principal Commencement
Date, a draw will be made under the Credit Enhancement to pay principal with
respect to the Class B Certificates to the extent that the unpaid principal
amount of the Class B Certificates exceeds the Class B Invested Amount on such
Distribution Date, in an amount equal to the lesser of (a) the Available
Enhancement Amount on such Distribution Date (after giving effect to all other
draws under the Credit Enhancement on such Distribution Date as described
above) and (b) such excess.
 
  In the event of a sale of the Receivables and an early termination of the
Trust due to an Insolvency Event, an optional repurchase of the
Certificateholders' Interest by the Banks, a sale of a portion of the
Receivables in connection with the Series Termination Date, a repurchase or
sale of the Certificateholders' Interest and the certificateholders' interest
for all other Series in connection with a Servicer Default or a reassignment
of the Certificateholders' Interest and the certificateholders' interest for
all other Series in connection with a breach by the Bank of certain
representations and warranties (each as described under "--Early Amortization
Events", "--Optional Termination; Final Payment of Principal" or "The Pooling
Agreement Generally--Termination of Trust", "--Representations and Warranties"
and "--Servicer Default"), any Available Enhancement Amount on the related
Distribution Date (after giving effect to all other draws under the Credit
Enhancement on such Distribution Date as described above) will be drawn under
the Credit Enhancement and the proceeds thereof will be distributed to Class B
Certificateholders to the extent that, after giving effect to the distribution
to the Class B Certificateholders of the proceeds from such sale or repurchase
allocated to the Class B Certificateholders (after the Class A Invested Amount
has been fully paid), the unpaid principal amount of the Class B Certificates
exceeds the Class B Invested Amount.
 
  On each Distribution Date, the Servicer, or the Trustee, acting pursuant to
the Servicer's instructions, will apply Surplus Finance Charge Collections (to
the extent described above under "--Allocations, Reallocations and
Subordination--Allocations, Reallocations and Subordination Within a Series--
Excess Finance Charge Collections") to increase the Available Enhancement
Amount (to the extent such amount is less than the Initial Enhancement
Amount).
 
                                      47
<PAGE>
 
 The Cash Collateral Account
 
  If the Credit Enhancement with respect to any Series includes a Cash
Collateral Account, the Trustee will hold the Cash Collateral Account for the
benefit of the Investor Certificateholders and the provider of Credit
Enhancement, as their interests appear in the Series Supplement, and in the
case of the provider of Credit Enhancement, the applicable Credit Enhancement
Agreement. The Cash Collateral Account will be one or more Eligible Deposit
Accounts; provided, however, that an "Eligible Institution", as such term is
used in the definition of "Eligible Deposit Account" (to the extent of funds
in the Cash Collateral Account that exceed the Available Shared Enhancement
Amount) shall, with respect to Standard & Poor's, have a long-term unsecured
debt rating of at least A, instead of AAA, or a certificate of deposit rating
of at least A-1, instead of A-1+. Funds on deposit in the Cash Collateral
Account will be invested in certain Eligible Investments, although for
purposes of investments of funds in the Cash Collateral Account (to the extent
such funds exceed the Available Shared Enhancement Amount on any date) the
term "highest rating" as used in the definition of "Eligible Investments"
shall include A-1 as well as A-1+, in the case of a short-term rating by
Standard & Poor's.
 
  Unless otherwise specified in the Prospectus Supplement, the Cash Collateral
Account will be funded on the Series Issuance Date in an amount specified in
the related Prospectus Supplement (the "Initial Cash Collateral Amount") from
the proceeds of an advance to be made by one or more financial institutions to
be selected by the Banks (such financial institution or institutions, the
"Cash Collateral Depositor"). Such advance will be repaid pursuant to the
applicable Credit Enhancement Agreement. The Cash Collateral Account will be
terminated following the earliest to occur of (a) the date on which the
Investor Certificates are paid in full, (b) the date on which the entire
Available Enhancement Amount is distributed to the Investor Certificateholders
as a result of the occurrence of an Economic Early Amortization Event and (c)
the Series Termination Date. If the Cash Collateral Account is the sole source
of Credit Enhancement, a portion of the Initial Cash Collateral Amount
specified in the related Prospectus Supplement (the "Initial Shared Collateral
Amount") will be for the benefit of both the Class A Certificates and the
Class B Certificates, and the remainder of the Initial Cash Collateral Amount
(the "Initial Class B Collateral Amount") will be for the exclusive benefit of
the Class B Certificates.
 
  Unless otherwise specified in the Prospectus Supplement, on each
Distribution Date, the amount available to be withdrawn from the Cash
Collateral Account (the "Available Cash Collateral Amount") will be equal to
the lesser of the amount on deposit in the Cash Collateral Account (before
giving effect to any deposit to be made to the Cash Collateral Account on such
Distribution Date) and the Initial Cash Collateral Amount.
 
 The L/C
 
  If the Credit Enhancement with respect to any Series includes a letter of
credit (the "L/C"), the Trustee will hold the L/C for the benefit of the
Investor Certificateholders. The L/C, if any, will have a stated maximum
amount (the "Stated L/C Amount") specified in the related Prospectus
Supplement. If the L/C is the sole source of Credit Enhancement, a portion of
the Stated L/C Amount specified in the related Prospectus Supplement, (the
"Initial Shared L/C Amount") will be for the benefit of both the Class A
Certificates and the Class B Certificates, and the remainder of the Stated L/C
Amount (the "Initial Class B L/C Amount") will be for the exclusive benefit of
the Class B Certificates. Unless otherwise specified in the Prospectus
Supplement, on each Distribution Date, the amount available under the L/C (the
"Available L/C Amount") will equal the lesser of (x) the Stated L/C Amount and
(y) the Available L/C Amount for the previous Distribution Date minus all
drawings under the L/C with respect to such previous Distribution Date plus
the amount of all distributions made to the L/C Issuer from the Collection
Account out of available Excess Finance Charge Collections on such previous
Distribution Date (less the amount of any such distributions in respect of
interest or fees paid to the L/C Issuer). The L/C will be terminated following
the earliest to occur of (a) the date on which the Investor Certificates are
paid in full, (b) the date on which the entire Available Enhancement Amount is
distributed to the Investor Certificateholders as a result of the occurrence
of an Economic Early Amortization Event and (c) the Series Termination Date.
Information with respect to the issuer of the L/C (the "L/C Issuer") will be
provided in the related Prospectus Supplement.
 
 
                                      48
<PAGE>
 
  In the event at any time the debt obligations of the L/C Issuer are
downgraded or withdrawn (such event being referred to as an "L/C Issuer
Downgrade") and, as a result of such L/C Issuer Downgrade, the Rating Agency
reduces (or indicates that it may reduce) the then-current rating of the Class
A Certificates or the Class B Certificates, then the Servicer will, within the
time period specified by the applicable Rating Agency, either (i) replace the
L/C with (x) an irrevocable letter of credit with a stated amount not less
than the Stated L/C Amount and issued by a successor L/C Issuer satisfactory
to the Rating Agency or (y) any other arrangement satisfactory to the Rating
Agency; provided that in either case there is no Ratings Effect; or (ii) cause
a draw to be made under the L/C in an amount equal to the Available L/C Amount
and deposit such amount into an Eligible Deposit Account established by the
Servicer for the benefit of the Investor Certificateholders and the L/C Issuer
(the "L/C Funding Account").
 
  After the establishment and funding of the L/C Funding Account, any amount
which would formerly have been drawn under the L/C will be withdrawn from such
account and any distribution that would formerly have been made to the L/C
Issuer pursuant to clause (i) under "--Allocations, Reallocations and
Subordination--Allocations, Reallocations and Subordination Within a Series--
Excess Finance Charge Collections" will be deposited in the L/C Funding
Account.
 
 Other Series Enhancements
 
  Any other Series Enhancement with respect to a Series, including, but not
limited to, interest rate swap agreements, interest rate cap agreements or
other similar arrangements will be described in the related Prospectus
Supplement.
 
EARLY AMORTIZATION EVENTS
 
  As described above, the Revolving Period will continue until the
commencement of the Accumulation Period, which will continue until the Class A
Invested Amount and the Class B Invested Amount have been paid in full, unless
an Early Amortization Event occurs prior to any of such dates. An "Early
Amortization Event" refers to any of the following events and any other events
specified as such in the related Prospectus Supplement:
 
    (a) failure on the part of either of the Banks (i) to make any payment or
  deposit required under the Pooling Agreement or any Supplement within five
  business days after the date such payment or deposit is required to be
  made; or (ii) to observe or perform any other covenants or agreements of
  the Banks set forth in the Pooling Agreement or any Supplement, which
  failure has a material adverse effect on the investor certificateholders of
  any Series and which continues unremedied for a period of 60 days after
  written notice;
 
    (b) any representation or warranty made by the Banks in the Pooling
  Agreement or any Supplement or any information required to be given by the
  Banks to the Trustee to identify the Accounts proves to have been incorrect
  in any material respect when made and continues to be incorrect in any
  material respect for a period of 60 days after written notice and as a
  result of which the interests of the investor certificateholders of any
  Series are materially and adversely affected; provided, however, that an
  Early Amortization Event shall not be deemed to occur thereunder if the
  Banks have repurchased the related Receivables or all such Receivables, if
  applicable, during such period in accordance with the provisions of the
  Pooling Agreement;
 
    (c) the occurrence of certain events of bankruptcy, insolvency or
  receivership relating to either of the Banks;
 
    (d) a failure by the Banks to make a Lump Sum Addition to the Trust
  within five business days after the day on which they are required to make
  such Lump Sum Addition pursuant to the Pooling Agreement;
 
    (e) the Trust becomes an investment company within the meaning of the
  Investment Company Act;
 
    (f) the amount of Surplus Finance Charge Collections averaged over a
  period of three consecutive Due Periods is less than or equal to the
  Required Surplus Finance Charge Amount for the last of such three
  consecutive Due Periods;
 
    (g) the occurrence of any Servicer Default;
 
                                      49
<PAGE>
 
    (h) on any Determination Date, the Class B Invested Amount on the next
  Distribution Date will be less than 1% of the initial aggregate principal
  amount of the Investor Certificates (or, if applicable with respect to a
  particular Series, the highest invested amount during the related Due
  Period, or, during any accumulation period, scheduled amortization period,
  early amortization period or class A amortization period, the highest
  invested amount during the Due Period preceding the first Due Period with
  respect to such accumulation period, scheduled amortization period, early
  amortization period or class A amortization period);
 
    (i) on the last day of any Due Period during the Accumulation Period, the
  product of (i) the total amount of Principal Receivables as of such last
  day, (ii) the Series Allocation Percentage with respect to the Investor
  Certificates for such Due Period and (iii) the excess of 100% over the
  Floating Allocation Percentage for such Due Period, fails to equal at least
  100% of the Class A Principal Funding Account Balance as of such last day;
 
    (j) any reduction of the Portfolio Yield for any Due Period during the
  Accumulation Period to a rate below the weighted average certificate rate
  for all Series in the Group (provided that, if the certificate rate for a
  class or Series is a floating rate, such calculation shall be determined
  after giving effect to the benefit of any related interest rate cap
  agreement or interest rate swap agreement);
 
    (k) the failure to pay in full the Class A Invested Amount on the Class A
  Expected Final Payment Date or the Class B Invested Amount on the Class B
  Expected Final Payment Date;
 
    (l) either of the Banks is unable for any reason to transfer Receivables
  to the Trust in accordance with the Pooling Agreement;
 
    (m) in the event that any Series Enhancement includes one or more
  interest rate cap agreements or interest rate swap agreements, the failure
  of any interest rate cap provider or any swap counterparty, as the case may
  be, to make a payment under such agreement within five days of the date
  such payment was due; or
 
    (n) in the event that any Series Enhancement includes one or more
  interest rate cap agreements or interest rate swap agreements, the failure
  of the Servicer, within 30 days of the date on which the debt ratings of
  any interest rate cap provider or any swap counterparty, as the case may
  be, fall below the required ratings of any of the Ratings Agencies as
  specified in the related Series Supplement, to (i) obtain a replacement
  interest rate cap agreement or interest rate swap agreement, as the case
  may be, with terms substantially the same as such downgraded interest rate
  cap agreement or interest rate swap agreement or (ii) establish any other
  arrangement satisfactory to the applicable Rating Agency, in any case such
  that the Rating Agency will not reduce or withdraw its ratings of the
  Investor Certificates.
 
  In the case of any event described in (a), (b) or (g), an Early Amortization
Event with respect to any Series will be deemed to have occurred only if,
after the applicable grace period described in such clauses, if any, either
the Trustee or investor certificateholders holding investor certificates
evidencing more than 50% of the aggregate unpaid principal amount of the
investor certificates of any Series to which such event relates by written
notice to the Banks and the Servicer (and to the Trustee, if given by the
investor certificateholders) declare that an Early Amortization Event has
occurred as of the date of such notice. See "Special Considerations--Series
Considerations--Control". In the case of any event described in clause (c),
(d), (e) or (l), an Early Amortization Event with respect to all Series will
be deemed to have occurred without any notice or other action on the part of
the Trustee or the investor certificateholders of any Series immediately upon
the occurrence of such event. In the case of any event described in clause
(f), (h), (i), (j), (k), (m) or (n), an Early Amortization Event with respect
to the Series offered hereby will be deemed to have occurred without any
notice or other action on the part of the Trustee or the Investor
Certificateholders immediately upon the occurrence of such event. The Early
Amortization Period will commence on the day on which the Early Amortization
Event occurs. Monthly distributions of principal to the Class A
Certificateholders will begin on the first Special Payment Date. Any amounts
on deposit in the Class A Principal Funding Account or the Class A Interest
Funding Account at such time will be distributed on such first Special Payment
Date to the Class A Certificateholders and any amounts on deposit in the Class
B Interest Funding Account at such time will be distributed on such first
Special Payment
 
                                      50
<PAGE>
 
Date to Class B Certificateholders; provided, however, that, except as
described in the following sentence, principal payments with respect to the
Class B Certificates will not be made until the final principal payment has
been made with respect to the Class A Certificates. In addition, on the first
Special Payment Date following an Economic Early Amortization Event, funds
will be drawn under the Credit Enhancement and used to make principal payments
with respect to the Investor Certificates as described under "--Series
Enhancements".
 
  In addition to the consequences of an Early Amortization Event discussed
above, if an Insolvency Event occurs, pursuant to the Pooling Agreement, on
the day of such Insolvency Event, the Banks will immediately cease to transfer
Principal Receivables to the Trust and promptly give notice to the Trustee of
such Insolvency Event. Under the terms of the Pooling Agreement, within 15
days the Trustee will publish a notice of the occurrence of the Insolvency
Event stating that the Trustee intends to sell, dispose of or otherwise
liquidate the Receivables in a commercially reasonable manner and on
commercially reasonable terms unless within 90 days from the date such notice
is published each other holder of the Banks' Certificate and the holders of
investor certificates of each Series or each class of each Series evidencing
more than 50% of the aggregate unpaid principal amount of each such Series or
class (and, in the case of certain Series, any credit enhancer with respect
thereto) instruct the Trustee not to dispose of or liquidate the Receivables
and to continue transferring Principal Receivables as before such Insolvency
Event. The proceeds from any such sale, disposition or liquidation of the
Receivables will be deposited in the Collection Account and allocated as
described in the Pooling Agreement and each Series Supplement. If the portion
of such proceeds allocated to the Class A Interest and the proceeds of any
collections on the Receivables in the Collection Account allocated to the
Class A Interest are not sufficient to pay the Class A Invested Amount in
full, the amount of principal returned to Class A Certificateholders will be
reduced and Class A Certificateholders will incur a loss and no principal will
be available to the Class B Certificateholders, who will also incur a loss.
Following any such sale of the Receivables, however, any Available Enhancement
Amount on the related Distribution Date (after giving effect to certain other
draws under the Credit Enhancement on such Distribution Date as described
under "--Series Enhancements") will be drawn under the Credit Enhancement and
distributed to Class B Certificateholders to the extent that, after giving
effect to the distribution to Class B Certificateholders of the proceeds of
the sale allocated to the Class B Certificateholders, the unpaid principal
amount of the Class B Certificates exceeds the Class B Invested Amount.
 
SERVICING COMPENSATION AND PAYMENT OF EXPENSES
 
  The Servicer's compensation for its servicing activities and reimbursement
for its expenses is a monthly servicing fee (the "Trust Servicing Fee") in an
amount equal to the sum of the series servicing fees with respect to all
Series. The series servicing fee with respect to the Investor Certificates
(the "Series Servicing Fee") shall accrue from the Series Issuance Date and
shall be payable to the Servicer, in arrears, on each Distribution Date in
respect of any Due Period (or portion thereof) occurring prior to the earlier
of the first Distribution Date following the Series Termination Date and the
first Distribution Date on which the Invested Amount and the Enhancement
Invested Amount, if any, are zero, in the aggregate amount specified below.
 
  On each Distribution Date, Servicer Interchange with respect to the related
Due Period that is on deposit in the Collection Account will be withdrawn from
the Collection Account and paid to the Servicer as a portion of the Series
Servicing Fee with respect to such Due Period. The "Servicer Interchange" for
any Due Period will be equal to the product of (a) the Floating Allocation
Percentage for such Due Period and (b) the portion of Series Allocable Finance
Charge Collections deposited in the Collection Account for such Due Period
that is attributable to Interchange; provided, however, that Servicer
Interchange for a Due Period shall not exceed one-twelfth of the product of
(i) the sum of the Invested Amount and the Enhancement Invested Amount, if
any, as of the last day of the preceding Due Period and (ii) the percentage
(the "Servicer Interchange Rate") specified in the related Prospectus
Supplement.
 
  The share of the Series Servicing Fee allocable to the Class A
Certificateholders (after giving effect to the distribution of Servicer
Interchange, if any) with respect to any Distribution Date (the "Class A
Monthly Servicing Fee") shall be equal to one-twelfth of the product of (a)
the percentage (the "Net Servicing Fee Rate") specified in the related
Prospectus Supplement, (b) the sum of the Invested Amount and the Enhancement
 
                                      51
<PAGE>
 
Invested Amount, if any, as of the last day of the Due Period second preceding
such Distribution Date and (c) a fraction, the numerator of which is the Class
A Invested Amount as of the last day of the Due Period second preceding such
Distribution Date and the denominator of which is the Invested Amount as of
such last day. The share of the Series Servicing Fee allocable to the Class B
Certificateholders (after giving effect to the distribution of Servicer
Interchange, if any) with respect to any Distribution Date (the "Class B
Monthly Servicing Fee") shall be equal to one-twelfth of the product of (a)
the Net Servicing Fee Rate, (b) the sum of the Invested Amount and the
Enhancement Invested Amount, if any, as of the last day of the Due Period
second preceding such Distribution Date and (c) a fraction, the numerator of
which is the Class B Invested Amount as of the last day of the Due Period
second preceding such Distribution Date and the denominator of which is the
Invested Amount as of such last day. The remaining portion of the Series
Servicing Fee will be allocable to the Banks' Interest (the "Seller Servicing
Fee"). The Class A Monthly Servicing Fee and the Class B Monthly Servicing Fee
will be paid on each Distribution Date with respect to each Due Period from
the Collection Account (unless such amounts have been netted against deposits
to the Collection Account) as described under "--Allocations, Reallocations
and Subordination--Reallocations Among Investor Certificates of Different
Series--Group One Investor Finance Charges".
 
  The Servicer will pay from its servicing compensation certain expenses
incurred in connection with servicing the Accounts and the Receivables
including, without limitation, expenses related to enforcement of the
Receivables, payment of fees and disbursements of the Trustee and independent
accountants and all other fees and expenses which are not expressly stated in
the Pooling Agreement, the Series Supplement and any other Supplement to be
payable by the Trust or the Banks (other than federal, state, local and
foreign income and franchise taxes, if any, or any interest or penalties with
respect thereto, of the Trust).
 
RECORD DATE
 
  Payments on the Class A Certificates and the Class B Certificates will be
made as described herein to the Investor Certificateholders in whose names the
Investor Certificates were registered (expected to be Cede, as nominee of DTC,
in the case of any publicly issued class of investor certificates) at the
close of business on the last day of the calendar month preceding the date of
such payment (each a "Record Date"). However, the final payment on the
Investor Certificates will be made only upon presentation and surrender of the
Investor Certificates. Distributions made to DTC will be made in immediately
available funds. See "The Pooling Agreement Generally--Book-Entry
Registration".
 
OPTIONAL TERMINATION; FINAL PAYMENT OF PRINCIPAL
 
  On the Distribution Date occurring on or after the date that the sum of the
Invested Amount and the Enhancement Invested Amount, if any, is reduced to 5%
or less of the initial outstanding aggregate principal amount of the Investor
Certificates, the Banks will have the option to repurchase the
Certificateholders' Interest. The purchase price will be equal to the sum of
the Invested Amount and the Enhancement Invested Amount, if any, plus accrued
and unpaid interest on the unpaid principal amount of the Class A Certificates
and the Class B Certificates at the applicable certificate rate (and accrued
and unpaid interest with respect to interest amounts that were due but not
paid on a prior Interest Payment Date or Special Payment Date at the
applicable certificate rate) through the day preceding such Distribution Date.
Following any such repurchase, the Class A Certificateholders and Class B
Certificateholders will have no further rights with respect to the
Receivables. In the event that the Banks fail for any reason to deposit the
aggregate purchase price for the Certificateholders' Interest, payments would
continue to be made to the Investor Certificateholders as described under "--
Distributions".
 
  In any event, the last payment of principal and interest on the Investor
Certificates will be due and payable not later than the date (the "Series
Termination Date") specified in the related Prospectus Supplement. In the
event that the Class A Invested Amount or the Class B Invested Amount is
greater than zero on the Series Termination Date, the Trustee will sell or
cause to be sold interests in the Principal Receivables or certain Principal
Receivables, together in each case with related Finance Charge Receivables, as
specified in the Pooling
 
                                      52
<PAGE>
 
Agreement and the Series Supplement, in an amount, subject to certain
limitations, of up to 110% of the Invested Amount at the close of business on
the Series Termination Date. The net proceeds of such sale will be deposited
in the Collection Account and allocated to the Investor Certificateholders, as
provided in the Pooling Agreement and the Series Supplement.
 
REPORTS
 
  No later than the fourth business day prior to each Distribution Date (or
such later date as is specified in the related Prospectus Supplement), the
Servicer will forward to the Trustee, the Paying Agent, the Rating Agency and
each provider of Series Enhancement a statement (the "Monthly Report")
prepared by the Servicer setting forth certain information with respect to the
Trust and the Investor Certificates (unless otherwise indicated), including:
(a) with respect to the Accounts: (i) the Portfolio Yield, (ii) the rate at
which new purchases of merchandise and services are made in the Accounts,
(iii) the total payment rate on the Accounts, (iv) the rate of principal
payment on the Accounts, (v) the aggregate principal balance of the Accounts
and (vi) the aggregate outstanding balance of the Accounts which were
delinquent as of the close of business at the end of the calendar month
immediately preceding such Distribution Date as a percentage of Receivables;
(b) with respect to Group One: (i) the weighted average certificate rate for
all Series issued with respect to Group One and the weighted average series
servicing fee rates and the rate of other fees allocable to the investor
certificateholders of all such Series, (ii) the amount of surplus finance
charge collections, the required surplus finance charge amount and the excess
of surplus finance charge collections over required surplus finance charge
amount for each such Series (in each case expressed as a percentage of the
invested amount of such Series and on a dollar amount basis), (iii) the
aggregate amount of collections in respect of Principal Receivables, the
aggregate amount of collections in respect of Finance Charge Receivables and
the total amount of collections in respect of the Receivables, (iv) the total
monthly interest expense, (v) the total servicing fee and other similar fees
paid and (vi) the Group One Investor Default Amount; and (c) with respect to
the Investor Certificates: (i) the Class A Invested Amount and Class B
Invested Amount for such Distribution Date, (ii) the amount of the Class A
Monthly Interest and Class B Monthly Interest for such Distribution Date and,
during the Accumulation Period or any Early Amortization Period, the amount of
Class A Monthly Principal and Class B Monthly Principal for such Distribution
Date, (iii) the amount on deposit in each of the Class A Funding Accounts and
the Class B Interest Funding Account on such Distribution Date, (iv) the
Available Enhancement Amount for such Distribution Date and (v) the amount, if
any, of Class A Investor Charge-Offs and Class B Investor Charge-Offs for such
Distribution Date.
 
  With respect to each Interest Payment Date (including the Class A Expected
Final Payment Date and the Class B Expected Final Payment Date) or Special
Payment Date, as the case may be, the Monthly Report will include the
following additional information with respect to the Investor Certificates:
(a) the total amount distributed; (b) the amount of such distribution
allocable to principal on the Class A Certificates and the Class B
Certificates; (c) the amount of such distribution allocable to interest on the
Class A Certificates and the Class B Certificates; (d) in the event that any
Series Enhancement includes an interest rate cap agreement or interest rate
swap agreement, the amount of payments, if any, under such interest rate cap
agreement or interest rate swap agreement made with respect to such date; (e)
the amount, if any, by which the unpaid principal balance of the Class A
Certificates exceeds the Class A Invested Amount and the amount, if any, by
which the unpaid principal balance of the Class B Certificates exceeds the
Class B Invested Amount, in each case as of the Record Date with respect to
such Interest Payment Date or Special Payment Date, as the case may be; (f)
the amount and date of issuance of any Additional Investor Certificates; and
(g) if the commencement of the Accumulation Period has been postponed, the
date on which the Accumulation Period will begin. On each Distribution Date,
the Paying Agent, on behalf of the Trustee, will forward to each Investor
Certificateholder of record a copy of the Monthly Report.
 
  On or before January 31 of each calendar year, the Paying Agent, on behalf
of the Trustee, will furnish (or cause to be furnished) to each person who at
any time during the preceding calendar year was an Investor Certificateholder
of record a statement containing the information required to be provided by an
issuer of indebtedness under the Code for such preceding calendar year or the
applicable portion thereof during which
 
                                      53
<PAGE>
 
such person was an Investor Certificateholder, together with such other
customary information as is necessary to enable the Investor
Certificateholders to prepare their tax returns. See "Tax Matters".
 
LIST OF INVESTOR CERTIFICATEHOLDERS
 
  At such time, if any, as Definitive Certificates have been issued, upon
written request of any Investor Certificateholder or group of Investor
Certificateholders of record holding Investor Certificates evidencing not less
than 10% of the aggregate unpaid principal amount of the Investor
Certificates, the Trustee will afford such Investor Certificateholders access
during normal business hours to the current list of Investor
Certificateholders of the Trust for purposes of communicating with other
Investor Certificateholders with respect to their rights under the Pooling
Agreement or the Series Supplement or under the Investor Certificates. See
"The Pooling Agreement Generally--Book-Entry Registration" and "--Definitive
Certificates".
 
  The Pooling Agreement does not provide for any annual or other meetings of
Investor Certificateholders.
 
                        THE POOLING AGREEMENT GENERALLY
 
BOOK-ENTRY REGISTRATION
 
  Unless otherwise specified in the Summary of Terms, Investor
Certificateholders may hold their Investor Certificates through DTC (in the
United States) or Cedel or Euroclear (in Europe) if they are participants of
such systems, or indirectly through organizations which are participants in
such systems.
 
  Cede, as nominee for DTC, will be the registered holder of the global
Investor Certificates. No Investor Certificateholder will be entitled to
receive a certificate representing such person's interest in the Investor
Certificates. Unless and until Definitive Certificates are issued under the
limited circumstances described below, all references herein to actions by
Class A Certificateholders and Class B Certificateholders shall refer to
actions taken by DTC upon instructions from its Participants, and all
references herein to distributions, notices, reports and statements to Class A
Certificateholders and Class B Certificateholders shall refer to
distributions, notices, reports and statements to Cede, as the registered
holder of the Class A Certificates and the Class B Certificates, for
distribution to Class A Certificateholders or Class B Certificateholders, as
the case may be, in accordance with DTC procedures.
 
  Cedel and Euroclear will hold omnibus positions on behalf of their
participants through customers' securities accounts in Cedel's and Euroclear's
names on the books of their respective Depositaries which in turn will hold
such positions in customers' securities accounts in the Depositaries' names on
the books of DTC. Citibank, N.A. ("Citibank") will act as depositary for Cedel
and Morgan Guaranty Trust Company of New York ("Morgan") will act as
depositary for Euroclear (in such capacities, the "Depositaries").
 
  Transfers between DTC participants will occur in the ordinary way in
accordance with DTC rules. Transfers between Cedel Participants and Euroclear
Participants will occur in the ordinary way in accordance with their
applicable rules and operating procedures.
 
  Cross-market transfers between persons holding directly or indirectly
through DTC, on the one hand, and directly or indirectly through Cedel or
Euroclear participants, on the other, will be effected in DTC in accordance
with DTC rules on behalf of the relevant European international clearing
system by its Depositary; however, such cross-market transactions will require
delivery of instructions to the relevant European international clearing
system by the counterparty in such system in accordance with its rules and
procedures and within its established deadlines (European time). The relevant
European international clearing system will, if the transaction meets its
settlement requirements, deliver instructions to its Depositary to take action
to effect final settlement on its behalf by delivering or receiving securities
in DTC, and making or receiving payment in accordance with normal procedures
for same-day funds settlement applicable to DTC. Cedel Participants and
Euroclear Participants may not deliver instructions directly to the
Depositaries.
 
 
                                      54
<PAGE>
 
  Because of time-zone differences, credits of securities received in Cedel or
Euroclear as a result of a transaction with a DTC participant will be made
during subsequent securities settlement processing and dated the business day
following the DTC settlement date. Such credits or any transactions in such
securities settled during such processing will be reported to the relevant
Euroclear or Cedel participant on such business day. Cash received in Cedel or
Euroclear as a result of sales of securities by or through a Cedel Participant
or a Euroclear Participant to a DTC participant will be received with value on
the DTC settlement date but will be available in the relevant Cedel or
Euroclear cash account only as of the business day following settlement in
DTC. For additional information regarding clearance and settlement procedures
for the Investor Certificates, see Annex I hereto and for information with
respect to tax documentation procedures relating to the Investor Certificates,
see Annex I hereto and "Tax Matters--Federal Income Tax Consequences--Non-
United States Investors".
 
  DTC is a limited-purpose trust company organized under the laws of the State
of New York, a member of the Federal Reserve System, a "clearing corporation"
within the meaning of the UCC and a "clearing agency" registered pursuant to
the provisions of Section 17A of the Exchange Act. DTC was created to hold
securities for its participating organizations ("Participants") and facilitate
the clearance and settlement of securities transactions between Participants
through electronic book-entry changes in accounts of its Participants, thereby
eliminating the need for physical movement of certificates. Participants
include the Underwriters, securities brokers and dealers, banks, trust
companies and clearing corporations and may include certain other
organizations. Indirect access to the DTC system also is available to others
such as banks, brokers, dealers and trust companies that clear through or
maintain a custodial relationship with a Participant, either directly or
indirectly ("Indirect Participants").
 
  Investor Certificateholders that are not Participants or Indirect
Participants but desire to purchase, sell or otherwise transfer ownership of,
or other interests in, Investor Certificates may do so only through
Participants and Indirect Participants. In addition, Investor
Certificateholders will receive all distributions of principal of and interest
on the Investor Certificates from the Paying Agent, initially Citibank, or the
Trustee through DTC and its Participants. Under a book-entry format, Investor
Certificateholders will receive payments after the related Interest Payment
Date, Class A Expected Final Payment Date, Class B Expected Final Payment Date
or Special Payment Date, as the case may be, because, while payments are
required to be forwarded to Cede, as nominee for DTC, on each such date, DTC
will forward such payments to its Participants which thereafter will be
required to forward them to Indirect Participants or Investor
Certificateholders. It is anticipated that the only "Class A
Certificateholder" and "Class B Certificateholder" (as such terms are used in
the Pooling Agreement and the Series Supplement) will be Cede, as nominee of
DTC, and that Investor Certificateholders will not be recognized by the
Trustee as "Investor Certificateholders" under the Pooling Agreement and the
Series Supplement. Investor Certificateholders will only be permitted to
exercise the rights of Investor Certificateholders under the Pooling Agreement
and the Series Supplement indirectly through DTC and its Participants which in
turn will exercise their rights through DTC.
 
  Under the rules, regulations and procedures creating and affecting DTC and
its operations, DTC is required to make book-entry transfers among
Participants on whose behalf it acts with respect to the Investor Certificates
and is required to receive and transmit distributions of principal of and
interest on the Investor Certificates. Participants and Indirect Participants
with which Investor Certificateholders have accounts with respect to the
Investor Certificates similarly are required to make book-entry transfers and
receive and transmit such payments on behalf of their respective Investor
Certificateholders.
 
  Because DTC can only act on behalf of Participants, which in turn act on
behalf of Indirect Participants and certain banks, the ability of an Investor
Certificateholder to pledge Investor Certificates to persons or entities that
do not participate in the DTC system, or otherwise take actions in respect of
such Investor Certificates, may be limited due to the lack of a physical
certificate for such Investor Certificates.
 
  DTC has advised the Banks that it will take any action permitted to be taken
by an Investor Certificateholder under the Pooling Agreement or the Series
Supplement only at the direction of one or more Participants to whose account
with DTC the Investor Certificates are credited. Additionally, DTC has advised
the Banks that it will
 
                                      55
<PAGE>
 
take such actions with respect to specified percentages of the Class A
Interest, Class B Interest or Certificateholders' Interest only at the
direction of and on behalf of Participants whose holdings include undivided
interests that satisfy such specified percentages. DTC may take conflicting
actions with respect to other undivided interests to the extent that such
actions are taken on behalf of Participants whose holdings include such
undivided interests.
 
  Cedel Bank, societe anonyme ("Cedel") is incorporated under the laws of
Luxembourg as a professional depository. Cedel holds securities for its
participating organizations ("Cedel Participants") and facilitates the
clearance and settlement of securities transactions between Cedel Participants
through electronic book-entry changes in accounts of Cedel Participants,
thereby eliminating the need for physical movement of certificates.
Transactions may be settled in Cedel in any of 32 currencies, including United
States dollars. Cedel provides to its Participants, among other things,
services for safekeeping, administration, clearance and settlement of
internationally traded securities and securities lending and borrowing. Cedel
interfaces with domestic markets in several countries. As a professional
depository, Cedel is subject to regulation by the Luxembourg Monetary
Institute. Cedel Participants are recognized financial institutions around the
world, including underwriters, securities brokers and dealers, banks, trust
companies, clearing corporations and certain other organizations and may
include the Underwriters. Indirect access to Cedel is also available to
others, such as banks, brokers, dealers and trust companies that clear through
or maintain a custodial relationship with a Cedel Participant, either directly
or indirectly.
 
  The Euroclear System was created in 1968 to hold securities for participants
of the Euroclear System ("Euroclear Participants") and to clear and settle
transactions between Euroclear Participants through simultaneous electronic
book-entry delivery against payment, thereby eliminating the need for physical
movement of certificates and any risk from lack of simultaneous transfers of
securities and cash. Transactions may now be settled in any of 32 currencies,
including United States dollars. The Euroclear System includes various other
services, including securities lending and borrowing, and interfaces with
domestic markets in several countries generally similar to the arrangements
for cross-market transfers with DTC described above. The Euroclear System is
operated by Morgan Guaranty Trust Company of New York, Brussels, Belgium
office (the "Euroclear Operator" or "Euroclear"), under contract with
Euroclear Clearance System S.C., a Belgian cooperative corporation (the
"Cooperative"). All operations are conducted by the Euroclear Operator, and
all Euroclear securities clearance accounts and Euroclear cash accounts are
accounts with the Euroclear Operator, not the Cooperative. The Cooperative
establishes policy for the Euroclear System on behalf of Euroclear
Participants. Euroclear Participants include banks (including central banks),
securities brokers and dealers and other professional financial intermediaries
and may include any underwriters, agents or dealers involved in the
distribution of the Investor Certificates. Indirect access to the Euroclear
System is also available to other firms that clear through or maintain a
custodial relationship with a Euroclear Participant, either directly or
indirectly.
 
  The Euroclear Operator is the Belgian branch of a New York banking
corporation which is a member bank of the Federal Reserve System. As such, it
is regulated and examined by the Board of Governors of the Federal Reserve
System and the New York State Banking Department, as well as the Belgian
Banking Commission.
 
  Securities clearance accounts and cash accounts with the Euroclear Operator
are governed by the Terms and Conditions Governing Use of Euroclear and the
related Operating Procedures of the Euroclear System, and applicable Belgian
law (collectively, the "Terms and Conditions"). The Terms and Conditions
govern transfers of securities and cash within the Euroclear System,
withdrawals of securities and cash from the Euroclear System, and receipts of
payments with respect to securities in the Euroclear System. All securities in
the Euroclear System are held on a fungible basis without attribution of
specific certificates to specific securities clearance accounts. The Euroclear
Operator acts under the Terms and Conditions only on behalf of Euroclear
Participants, and has no record of or relationship with persons holding
through Euroclear Participants.
 
  Distributions with respect to Investor Certificates held through Cedel or
Euroclear will be credited to the cash accounts of Cedel Participants or
Euroclear Participants in accordance with the relevant system's rules and
procedures, to the extent received by its Depositary. Such distributions will
be subject to tax reporting in
 
                                      56
<PAGE>
 
accordance with relevant United States tax laws and regulations. See "Tax
Matters". The Cedel or the Euroclear Operator, as the case may be, will take
any other action permitted to be taken by an Investor Certificateholder under
the Pooling Agreement or the Series Supplement on behalf of a Cedel
Participant or Euroclear Participant only in accordance with its relevant
rules and procedures and subject to its Depositary's ability to effect such
actions on its behalf through DTC.
 
  Although DTC, Cedel and Euroclear have agreed to the foregoing procedures in
order to facilitate transfers of Certificates among participants of DTC, Cedel
and Euroclear, they are under no obligation to perform or continue to perform
such procedures and such procedures may be discontinued at any time.
 
DEFINITIVE CERTIFICATES
 
  The Investor Certificates will be issued to Investor Certificateholders in
certificated registered and/or bearer form, or in book-entry form, as
described in the Prospectus Supplement.
 
  If any Investor Certificates are originally issued in book-entry form
through DTC, thereafter such Investor Certificates will be issued in fully
registered, certificated form to Class A Certificateholders or Class B
Certificateholders or their respective nominees ("Definitive Certificates"),
rather than to DTC or its nominee, only if (i) the Banks advise the Trustee in
writing that DTC is no longer willing or able to discharge properly its
responsibilities as Depository with respect to the Investor Certificates, and
the Trustee or the Banks are unable to locate a qualified successor, (ii) the
Banks, at their option, elect to terminate the book-entry system through DTC
or (iii) after the occurrence of a Servicer Default, Investor
Certificateholders evidencing not less than 50% of the aggregate unpaid
principal amount of the Class A Certificates or 50% of the aggregate unpaid
principal amount of the Class B Certificates, as the case may be, advise the
Trustee and DTC through Participants in writing that the continuation of a
book-entry system through DTC (or a successor thereto) is no longer in the
best interests of the Investor Certificateholders.
 
  Upon the occurrence of any of the events described in the immediately
preceding paragraph, DTC is required to notify all Participants of the
availability through DTC of Definitive Certificates. Upon surrender by DTC of
the definitive certificates representing the Class A Certificates or the Class
B Certificates, as applicable, and instructions for re-registration, the
Trustee will issue such Investor Certificates in the form of Definitive
Certificates, and thereafter the Trustee will recognize the holders of such
Definitive Certificates as "Class A Certificateholders" or "Class B
Certificateholders", as applicable, under the Pooling Agreement and the Series
Supplement ("Holders").
 
  If Definitive Certificates are issued, distribution of principal and
interest on the Definitive Certificates will be made by the Paying Agent or
the Trustee directly to the Holders in whose names the Definitive Certificates
were registered on the related Record Date in accordance with the procedures
set forth herein and in the Pooling Agreement and the Series Supplement.
Distributions will be made by check mailed to the address of each Holder as it
appears on the register maintained by the Trustee, except that the final
payment on any Definitive Certificate will be made only upon presentation and
surrender of such Definitive Certificate on the date for such final payment at
such office or agency as is specified in the notice of final distribution to
Holders. The Trustee will provide such notice to Holders not later than the
fifth day of the month of the final distribution.
 
  Definitive Certificates will be transferable and exchangeable at the offices
of the Transfer Agent and Registrar, which shall initially be Citibank. No
service charge will be imposed for any registration of transfer or exchange,
but the Transfer Agent and Registrar may require payment of a sum sufficient
to cover any tax or other governmental charge imposed in connection therewith.
 
THE BANKS' CERTIFICATE
 
  The Pooling Agreement provides that the Banks may exchange a portion of the
certificate evidencing the Banks' interest in the Trust for another
certificate (a "Supplemental Certificate") for transfer or assignment to a
 
                                      57
<PAGE>
 
person designated by the Banks upon the execution and delivery of a supplement
to the Pooling Agreement (which supplement shall be subject to the amendment
section of the Pooling Agreement to the extent that it amends any of the terms
of the Pooling Agreement; see "--Amendments"); provided that (a) such transfer
will not result in a Ratings Effect, (b) the Banks' remaining interest in
Principal Receivables shall not be less than 2% of the total amount of
Principal Receivables, in each case as of the date of, and after giving effect
to, such exchange and (c) prior to such exchange, the Banks shall have
delivered an opinion of counsel acceptable to the Trustee that for federal and
South Dakota income and franchise tax purposes, (i) following such exchange
the Trust will not be treated as an association (or publicly traded
partnership) taxable as a corporation and (ii) such exchange will not
adversely affect the characterization of any investor certificates of any
Series as debt and will not cause a taxable event to holders of any such
investor certificates. Any transfer or assignment of a Supplemental
Certificate is subject to the conditions set forth in clauses (a) and (c) of
the preceding sentence.
 
TERMINATION OF TRUST
 
  Unless the Banks instruct the Trustee otherwise, the Trust will only
terminate on the earlier to occur of (a) the day following the day on which
the aggregate invested amounts of all Series is zero, (b) the expiration of 21
years from the death of the last survivor of the descendants of Joseph P.
Kennedy, the late Ambassador of the United States to the Court of St. James,
living on February 25, 1994 or (c) if the Receivables are sold, disposed of or
liquidated following the occurrence of an Insolvency Event as described under
"Series Provisions--Early Amortization Events", immediately following such
sale, disposition or liquidation (the "Trust Termination Date"). Upon
termination of the Trust, all right, title and interest in the Receivables and
other funds of the Trust (other than amounts in the accounts maintained by the
Trust for the final payment of principal and interest to holders of investor
certificates) will be conveyed and transferred to the Banks.
 
CONVEYANCE OF RECEIVABLES
 
  Pursuant to the Pooling Agreement, the Banks have sold and assigned to the
Trust their respective interests in all Receivables in the Initial Accounts
outstanding as of the Trust Cut-Off Date, all Receivables in the Additional
Accounts as of the applicable additional cut-off date, all Receivables
thereafter created under the Accounts and the proceeds of all of the
foregoing. The Receivables conveyed to the Trust by Citibank (Nevada) have
been previously participated to Citibank (Nevada) by Citibank (South Dakota).
 
  In connection with the transfer of any Receivables to the Trust, the Banks
are required to indicate in their computer records that the Receivables have
been conveyed to the Trust. In addition, the Banks have provided or will
provide to the Trustee a computer file or a microfiche list containing a true
and complete list showing for each Initial Account, as of the Trust Cut-Off
Date, and for each Additional Account, as of the applicable additional cut-off
date (i) its account number and (ii) except in the case of New Accounts, the
aggregate amount outstanding and the aggregate amount of Principal Receivables
in such Account. Citibank (South Dakota), as initial Servicer, will retain and
will not deliver to the Trustee any other records or agreements relating to
the Accounts or the Receivables. Except as set forth above, the records and
agreements relating to the Accounts and the Receivables will not be segregated
from those relating to other credit card accounts and receivables, and the
physical documentation relating to the Accounts or Receivables will not be
stamped or marked to reflect the transfer of Receivables to the Trust. The
Banks have filed and are required to file UCC financing statements with
respect to the sale of the Receivables to the Trust meeting the requirements
of applicable state law. See "Special Considerations" and "Certain Legal
Aspects of the Receivables".
 
REPRESENTATIONS AND WARRANTIES
 
  As of the issuance date for a Series (the "Series Issuance Date") specified
in the related Prospectus Supplement, the Banks will jointly and severally
make representations and warranties to the Trust relating to the Accounts and
the Receivables to the effect, among other things, that (a) as of the Trust
Cut-Off Date (or as of the additional cut-off date) each Account or each
Additional Account was an Eligible Account, (b) as of the Trust Cut-Off Date
(or as of the additional cut-off date), each of the Receivables then existing
in the Accounts or
 
                                      58
<PAGE>
 
in the Additional Accounts is an Eligible Receivable and (c) thereafter, as of
the date of creation of any new Receivable, such Receivable is an Eligible
Receivable. If the Banks breach any representation and warranty described in
this paragraph and such breach remains uncured for 60 days, or such longer
period as may be agreed to by the Trustee, after the earlier to occur of the
discovery of such breach by the Banks or receipt of written notice of such
breach by the Banks, and such breach has a material adverse effect on the
certificateholders' interest of all Series in any Receivable (which
determination shall be made without regard to whether funds are then available
to any certificateholders of any Series pursuant to any Series Enhancement),
such certificateholders' interest in all Receivables with respect to the
affected Account ("Ineligible Receivables") will be reassigned to the Banks on
the terms and conditions set forth below and such Account shall no longer be
included as an Account.
 
  An Ineligible Receivable shall be reassigned to the Banks on or before the
end of the Due Period in which such reassignment obligation arises by the
Banks directing the Servicer to deduct the portion of such Ineligible
Receivable which is a Principal Receivable from the aggregate amount of the
Principal Receivables used to calculate the Banks' Interest. In the event that
the exclusion of an Ineligible Receivable from the calculation of the Banks'
Interest would cause the Banks' Interest to be a negative number, on the
Distribution Date following the Due Period in which such reassignment
obligation arises, the Banks will make a deposit into the Collection Account
in immediately available funds in an amount equal to the amount by which the
Banks' Interest would be reduced below zero. In addition, if at the time of
the reassignment of any Ineligible Receivable to the Banks the invested amount
of any Series is less than the unpaid principal amount of the investor
certificates of such Series, on the Distribution Date following the Due Period
in which such reassignment obligation arises, the Banks will make a deposit
into the Collection Account in immediately available funds in an amount equal
to the lesser of (i) the excess of the portion of such Ineligible Receivable
which is a Principal Receivable over the amount to be deposited into the
Collection Account pursuant to the immediately preceding sentence and (ii) the
excess of the aggregate unpaid principal amount of the investor certificates
for all Series over the aggregate invested amounts of such Series. Any deposit
into the Collection Account in connection with the reassignment of an
Ineligible Receivable (the amount of any such deposit being referred to herein
as a "Transfer Deposit Amount") shall be considered a payment in full of the
Ineligible Receivable. The reassignment of any Ineligible Receivable to the
Banks is the sole remedy respecting any breach of the representations and
warranties described in the preceding paragraph with respect to such
Receivable available to investor certificateholders of any Series (or the
Trustee on behalf of such investor certificateholders) or any provider of
Series Enhancement.
 
  Each Bank will also make representations and warranties to the Trust to the
effect, among other things, that as of the Series Issuance Date (a) it is a
national banking association validly existing under the laws of the United
States, it has the authority to consummate the transactions contemplated by
the Pooling Agreement and the Series Supplement and each of the Pooling
Agreement and the Series Supplement constitutes a valid, binding and
enforceable agreement of such Bank and (b) the Pooling Agreement and the
Series Supplement constitutes a valid sale, transfer and assignment to the
Trust of all right, title and interest of such Bank in the Receivables,
whether then existing or thereafter created and the proceeds thereof
(including proceeds in any of the accounts established for the benefit of the
Investor Certificateholders) or the grant of a first priority perfected
security interest under the UCC as in effect in South Dakota and Nevada in
such Receivables and the proceeds thereof (including proceeds in any of the
accounts established for the benefit of the Investor Certificateholders),
which is effective as to each Receivable then existing on the Series Issuance
Date (or as of the addition date of any Receivable then existing in Additional
Accounts) or, as to each Receivable arising thereafter, upon the creation
thereof and until termination of the Trust. In the event that the breach of
any of the representations and warranties described in this paragraph has a
material adverse effect on the Certificateholders' Interest or the interests
of holders of certificates of any other Series in the Receivables or the
availability of the proceeds thereof to the Trust, either the Trustee or the
holders of investor certificates evidencing not less than 50% of the aggregate
unpaid principal amount of the investor certificates of all Series, by written
notice to the Banks and the Servicer (and to the Trustee if given by the
holders of the requisite percentage of investor certificates of all Series),
may direct the Banks to accept the reassignment of the Receivables in the
Trust within 60 days of such notice, or within such longer period specified in
such notice. The Banks will be obligated to accept the reassignment of
 
                                      59
<PAGE>
 
such Receivables on the Distribution Date following the Due Period in which
such reassignment obligation arises. Such reassignment will not be required to
be made, however, if, at the end of such applicable period, the
representations and warranties shall then be true and correct in all material
respects and any material adverse effect caused by such breach shall have been
cured. The price for such reassignment will generally be equal to the
aggregate invested amounts of all Series on the Distribution Date on which the
purchase is scheduled to be made plus accrued and unpaid interest on the
unpaid principal amount of all Series at the applicable certificate rates, and
any interest amounts that were due but not paid on a prior date and interest
on such overdue interest amounts (if the applicable Supplement so provides) at
the applicable certificate rates, through the last day of the calendar month
preceding such Distribution Date. The payment of such reassignment price, in
immediately available funds, will be considered a payment in full of all
Receivables and such funds will be treated as collections and distributed to
investor certificateholders of all Series upon presentation and surrender of
their certificates. If the Trustee or the requisite percentage of holders of
investor certificates of all Series gives a notice as provided above, the
obligation of the Banks to make any such deposit will constitute the sole
remedy respecting a breach of the representations and warranties available to
investor certificateholders of all Series (or the Trustee on behalf of such
investor certificateholders) or any provider of Series Enhancement.
 
  An "Eligible Account" is defined to mean a credit card account owned by
Citibank (South Dakota) which, as of the Trust Cut-Off Date with respect to an
Initial Account or as of the additional cut-off date with respect to an
Additional Account: (a) is in existence and maintained by Citibank (South
Dakota); (b) is payable in United States dollars; (c) in the case of the
Initial Accounts, has a cardholder who has provided, as his most recent
billing address, an address located in the United States or its territories or
possessions or a military address; (d) has a cardholder who has not been
identified by Citibank (South Dakota) in its computer files as being involved
in a voluntary or involuntary bankruptcy proceeding; (e) has not been
identified as an Account with respect to which the related card has been lost
or stolen; (f) has not been sold or pledged to any other party; (g) does not
have receivables which have been sold or pledged to any other party; and (h)
in the case of the Initial Accounts, is a VISA or MasterCard revolving credit
card account.
 
  An "Eligible Receivable" is defined to mean each Receivable (a) which has
arisen under an Eligible Account; (b) which was created in compliance in all
material respects with all requirements of law and pursuant to a credit card
agreement which complies in all material respects with all requirements of
law; (c) with respect to which all material consents, licenses, approvals or
authorizations of, or registrations with, any governmental authority required
to be obtained or given in connection with the creation of such Receivable or
the execution, delivery, creation and performance by Citibank (South Dakota)
or by the original credit card issuer, if not Citibank (South Dakota), of the
related credit card agreement have been duly obtained or given and are in full
force and effect; (d) as to which at the time of its transfer to the Trust,
the Banks or the Trust will have good and marketable title, free and clear of
all liens, encumbrances, charges and security interests; (e) which has been
the subject of either a valid transfer and assignment from the Banks to the
Trust of all the Banks' right, title and interest therein or the grant of a
first priority perfected security interest therein (and in the proceeds
thereof), effective until the termination of the Trust; (f) which will at all
times be the legal, valid and binding payment obligation of the cardholder
thereof enforceable against such cardholder in accordance with its terms,
subject to certain bankruptcy-related exceptions; (g) which at the time of its
transfer to the Trust, has not been waived or modified except as permitted
under the Pooling Agreement; (h) which is not at the time of its transfer to
the Trust subject to any right of rescission, setoff, counterclaim or defense
(including the defense of usury), other than certain bankruptcy-related
defenses; (i) as to which the Banks have satisfied all obligations to be
fulfilled at the time it is transferred to the Trust; (j) as to which the
Banks have done nothing, at the time of its transfer to the Trust, to impair
the rights of the Trust or investor certificateholders of all Series therein;
and (k) which constitutes either an "account" or a "general intangible" under
the UCC as then in effect under South Dakota or Nevada state law.
 
  It is not required or anticipated that the Trustee will make any initial or
periodic general examination of any documents or records related to the
Receivables or the Accounts for the purpose of establishing the presence or
absence of defects, compliance with the Banks' representations and warranties
or for any other purpose. In
 
                                      60
<PAGE>
 
addition, it is not anticipated or required that the Trustee will make any
initial or periodic general examination of the Servicer for the purpose of
establishing the compliance by the Servicer with its representations or
warranties or the performance by the Servicer of its obligations under the
Pooling Agreement or for any other purpose. The Servicer, however, will
deliver to the Trustee on or before March 31 of each calendar year an opinion
of counsel with respect to the validity of the interest of the Trust in and to
the Receivables and certain other components of the Trust.
 
INDEMNIFICATION
 
  The Pooling Agreement provides that the Servicer will indemnify the Trust
and the Trustee from and against any loss, liability, expense, damage or
injury suffered or sustained arising out of the Servicer's actions or
omissions with respect to the Trust pursuant to the Pooling Agreement.
 
  Under the Pooling Agreement, the Banks have agreed to be liable directly to
an injured party for the entire amount of any losses, claims, damages or
liabilities (other than those incurred by an investor certificateholder in the
capacity of an investor in the investor certificates of any Series) arising
out of or based on the arrangement created by the Pooling Agreement as though
such agreement created a partnership under the New York Uniform Partnership
Act in which the Banks were general partners. The Banks have agreed to pay,
indemnify and hold harmless each holder of investor certificates of any Series
against and from any such losses, claims, damages or liabilities except to the
extent that they arise from any action by such holder. In the event of a
Service Transfer, the successor Servicer will indemnify and hold harmless the
Banks for any losses, claims, damages and liabilities of the Banks as
described in this paragraph arising from the actions or omissions of such
successor Servicer.
 
  Except as provided in the preceding paragraphs, the Pooling Agreement
provides that none of the Banks, the Servicer or any of their directors,
officers, employees or agents will be under any other liability to the Trust,
the Trustee, the holders of investor certificates of any Series, any provider
of Series Enhancement or any other person for any action taken, or for
refraining from taking any action, in good faith pursuant to the Pooling
Agreement. However, none of the Banks, the Servicer or any of their directors,
officers, employees or agents will be protected against any liability which
would otherwise be imposed by reason of willful misfeasance, bad faith or
gross negligence of any such person in the performance of their duties or by
reason of reckless disregard of their obligations and duties thereunder.
 
  In addition, the Pooling Agreement provides that the Servicer is not under
any obligation to appear in, prosecute or defend any legal action which is not
incidental to its servicing responsibilities under the Pooling Agreement. The
Servicer may, in its sole discretion, undertake any such legal action which it
may deem necessary or desirable for the benefit of holders of investor
certificates of any Series with respect to the Pooling Agreement and the
rights and duties of the parties thereto and the interest of such investor
certificateholders thereunder.
 
COLLECTION AND OTHER SERVICING PROCEDURES
 
  Pursuant to the Pooling Agreement, the Servicer is responsible for
servicing, collecting, enforcing and administering the Receivables in
accordance with customary and usual procedures for servicing credit card
receivables, but in any event at least comparable with the policies and
procedures and the degree of skill and care applied or exercised with respect
to its own credit card receivables.
 
  Citibank (South Dakota) has covenanted that, except as otherwise required by
any requirement of law or as is deemed by Citibank (South Dakota) to be
necessary in order for it to maintain its credit card business on a
competitive basis based on a good faith assessment by it of the nature of the
competition in the credit card business, it will not take actions which would
reduce the Portfolio Yield to less than the sum of (a) the weighted average
certificate rate of each class of investor certificates of each Series
(provided that, if the certificate rate of a class is a floating rate, such
calculation shall be determined after giving effect to the benefit of any
related interest rate cap agreements or interest rate swap agreements) and (b)
the weighted average of the net servicing
 
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<PAGE>
 
fee rate allocable to each class of investor certificates of each Series. In
addition, Citibank (South Dakota) has agreed that, unless required by law, it
will not reduce the Portfolio Yield to less than the highest certificate rate
for any outstanding Series or class (provided that, if the certificate rate of
a Series or class is a floating rate, such calculation shall be determined
after giving effect to the benefit of any related interest rate cap agreements
or interest rate swap agreements). Citibank (South Dakota) also will covenant
that it may change the terms relating to the Accounts only if the change is
made applicable to the comparable segment of the portfolio of accounts with
similar characteristics owned or serviced by Citibank (South Dakota) and not
only to the Accounts.
 
  Servicing activities to be performed by the Servicer include collecting and
recording payments, communicating with cardholders, investigating payment
delinquencies, evaluating the increase of credit limits and the issuance of
credit cards, providing billing and tax records to cardholders and maintaining
internal records with respect to each Account. Managerial and custodial
services performed by the Servicer on behalf of the Trust include providing
assistance in any inspections of the documents and records relating to the
Accounts and Receivables by the Trustee pursuant to the Pooling Agreement,
maintaining the agreements, documents and files relating to the Accounts and
Receivables as custodian for the Trust and providing related data processing
and reporting services for investor certificateholders of any Series and on
behalf of the Trustee.
 
  Pursuant to the Pooling Agreement, Citibank (South Dakota), as Servicer, has
the right to delegate any of its responsibilities and obligations as Servicer
to any of its affiliates that agrees to conduct such duties in accordance with
the Pooling Agreement and Citibank (South Dakota)'s credit card guidelines.
Citibank (South Dakota) currently contracts and intends to continue to
contract with Citibank (Nevada) and Citicorp Credit Services, Inc., indirect
wholly owned subsidiaries of Citicorp, to perform certain of its servicing
activities. Notwithstanding any such delegation to any entity, the Servicer
will continue to be liable for all of its obligations under the Pooling
Agreement.
 
SERVICER COVENANTS
 
  In the Pooling Agreement, the Servicer has covenanted as to each Receivable
and related Account that: (a) it will duly fulfill all obligations on its part
to be fulfilled under or in connection with the Receivable or Account, and
will maintain in effect all qualifications required in order to service the
Receivable or Account the failure to comply with which would have a material
adverse effect on the investor certificateholders or any provider of Series
Enhancement; (b) it will not permit any rescission or cancellation of the
Receivable except as ordered by a court of competent jurisdiction or other
governmental authority; (c) it will do nothing to impair the rights of the
investor certificateholders in the Receivable or Account or the rights of any
provider of Series Enhancement; (d) it will not reschedule, revise or defer
payments due on the Receivable except in accordance with its guidelines for
servicing receivables; and (e) except in connection with its enforcement or
collection of an Account, it will take no action to cause any Receivables to
be evidenced by any instruments (as defined in the UCC) and if any Receivable
is so evidenced, it shall be reassigned or assigned to the Servicer as
provided below.
 
  Under the terms of the Pooling Agreement in the event (x) any of the
representations, warranties or covenants of the Servicer contained in clauses
(a) through (d) above with respect to any Receivable or the related Account is
breached, and such breach has a material adverse effect on the
certificateholders' interest of all Series in such Receivable (which
determination shall be made without regard to whether funds are then available
to any certificateholders of any Series pursuant to any Series Enhancement)
and is not cured within 60 days (or such longer period, not in excess of 150
days, as may be agreed to by the Trustee) of the earlier to occur of the
discovery of such event by the Servicer, or receipt by the Servicer of written
notice of such event given by the Trustee, or (y) as provided in clause (e)
above with respect to any Receivable, all Receivables in the Account or
Accounts to which such event relates shall be reassigned or assigned to the
Servicer on the terms and conditions set forth below. If Citibank (South
Dakota) is the Servicer, such reassignment will be made on or before the
Distribution Date following the Due Period in which such reassignment
obligation arises by the Servicer deducting the portion of any such Receivable
which is a Principal Receivable from the aggregate amount of Principal
Receivables used to calculate the Banks' Interest, the floating allocation
percentage and the principal allocation percentage applicable to any Series.
In addition, if the deduction of such Principal Receivable would
 
                                      62
<PAGE>
 
reduce the Banks' Interest below zero or if the invested amount of any Series
is then less than the unpaid principal amount of the investor certificates of
such Series, Citibank (South Dakota) as the Servicer will deposit into the
Collection Account the applicable Transfer Deposit Amount described above
under "--Representations and Warranties". If Citibank (South Dakota) is not
the Servicer, such assignment and transfer will be made when the Servicer
deposits an amount equal to the amount of such Receivable in the Collection
Account on the business day preceding the Distribution Date following the Due
Period during which such obligation arises. The amount of such deposit shall
be deemed a Transfer Deposit Amount hereunder. This reassignment or transfer
and assignment to the Servicer constitutes the sole remedy available to the
investor certificateholders of any Series if such covenant or warranty of the
Servicer is not satisfied and the Trust's interest in any such reassigned
Receivables shall be automatically assigned to the Servicer.
 
CERTAIN MATTERS REGARDING THE SERVICER
 
  The Servicer may not resign from its obligations and duties under the
Pooling Agreement, except upon determination that such duties are no longer
permissible under applicable law. No such resignation will become effective
until the Trustee or a successor to the Servicer has assumed the Servicer's
responsibilities and obligations under the Pooling Agreement. Notwithstanding
the foregoing, Citibank (South Dakota) may transfer its servicing obligations
to any other wholly owned subsidiary of Citicorp (which meets certain
eligibility standards set forth in the Pooling Agreement) and be relieved of
its obligations and duties under the Pooling Agreement.
 
  Any person into which, in accordance with the Pooling Agreement, Citibank
(South Dakota) or the Servicer may be merged or consolidated or any person
resulting from any merger or consolidation to which Citibank (South Dakota) or
the Servicer is a party, or any person succeeding to the business of Citibank
(South Dakota) or the Servicer, will be the successor to Citibank (South
Dakota), as servicer, or the Servicer, as the case may be, under the Pooling
Agreement.
 
SERVICER DEFAULT
 
  In the event of any Servicer Default (as defined below), either the Trustee
or investor certificateholders holding investor certificates evidencing more
than 50% of the aggregate unpaid principal amount of all outstanding Series,
by written notice to the Servicer (and to the Trustee and any provider of
Series Enhancement, if given by the investor certificateholders) (a
"Termination Notice"), may terminate all of the rights and obligations of the
Servicer, as servicer, under the Pooling Agreement. If the Trustee within 60
days of receipt of a Termination Notice is unable to obtain any bids from
eligible Servicers and the Banks deliver an officer's certificate to the
effect that the Servicer cannot in good faith cure the Servicer Default which
gave rise to the Termination Notice, then the Trustee shall offer the Banks a
right of first refusal to purchase the Certificateholders' Interest and the
certificateholders' interest for all other Series. The purchase price for such
a purchase shall be paid on a Distribution Date and shall generally be equal
to, with respect to each Series, the higher of (a) the invested amount of such
Series on such Distribution Date plus accrued and unpaid interest at the
applicable certificate rate (together with, if applicable, interest on
interest amounts that were due and not paid on a prior date at the applicable
certificate rate), through the last day of the calendar month preceding such
Distribution Date (plus the Enhancement Invested Amount, if any) and (b) the
average bid price quoted by two recognized dealers for similar securities
rated in the same rating category as the initial rating of the investor
certificates of such Series with a remaining maturity approximately equal to
the remaining maturity of the investor certificates of such Series (and, in
either case with respect to the Class A Certificates, certain additional
amounts specified in the Series Supplement).
 
  The Trustee shall, as promptly as possible after giving a Termination
Notice, appoint a successor Servicer (a "Service Transfer"), and if no
successor Servicer has been appointed by the Trustee and has accepted such
appointment by the time the Servicer ceases to act as Servicer, all rights,
authority, power and obligations of the Servicer under the Pooling Agreement
shall pass to and be vested in the Trustee. Prior to any Service Transfer, the
Trustee will seek to obtain bids from potential Servicers meeting certain
eligibility requirements set forth in
 
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<PAGE>
 
the Pooling Agreement to serve as a successor Servicer for servicing
compensation not in excess of the Trust Servicing Fee plus any amounts payable
to the Banks or Citibank (South Dakota), as Servicer, pursuant to the terms of
any Series Enhancement agreement. The rights and interest of the Banks under
the Pooling Agreement and any Supplement in the Banks' Interest will not be
affected by any Termination Notice or Service Transfer.
 
  A "Servicer Default" refers to any of the following events:
 
    (a) failure by the Servicer to make such payment, transfer or deposit, or
  to give instructions or to give notice to the Trustee to make such payment,
  transfer or deposit, on the date the Servicer is required to do so under
  the Pooling Agreement or any Supplement, which is not cured within a five
  business day grace period;
 
    (b) failure on the part of the Servicer duly to observe or perform in any
  material respect any other covenants or agreements of the Servicer in the
  Pooling Agreement or any Supplement which has a material adverse effect on
  the investor certificateholders of any Series or class (which determination
  shall be made without regard to whether funds are then available pursuant
  to any Series Enhancement) and which continues unremedied for a period of
  60 days after written notice, or the Servicer assigns or delegates its
  duties under the Pooling Agreement, except as specifically permitted
  thereunder;
 
    (c) any representation, warranty or certification made by the Servicer in
  the Pooling Agreement or any Supplement or in any certificate delivered
  pursuant to the Pooling Agreement or any Supplement proves to have been
  incorrect when made, which has a material adverse effect on the rights of
  the investor certificateholders of any Series or class (which determination
  shall be made without regard to whether funds are then available pursuant
  to any Series Enhancement), and which material adverse effect continues for
  a period of 60 days after written notice; or
 
    (d) the occurrence of certain events of bankruptcy, insolvency or
  receivership with respect to the Servicer.
 
  Notwithstanding the foregoing, a delay in or failure of performance referred
to under clause (a) above for a period of ten business days or referred to
under clause (b) or (c) for a period of 60 business days, shall not constitute
a Servicer Default if such delay or failure could not be prevented by the
exercise of reasonable diligence by the Servicer and such delay or failure was
caused by an act of God or other similar occurrence. Upon the occurrence of
any such event the Servicer shall not be relieved from using its best efforts
to perform its obligations in a timely manner in accordance with the terms of
the Pooling Agreement and any Supplement and the Servicer shall provide the
Trustee, the Banks, any provider of Series Enhancement and the investor
certificateholders of each Series prompt notice of such failure or delay by
it, together with a description of its efforts to so perform its obligations.
The Servicer shall immediately notify the Trustee in writing of any Servicer
Default.
 
EVIDENCE AS TO COMPLIANCE
 
  The Pooling Agreement provides that on or before March 31 of each calendar
year the Servicer will cause a firm of nationally recognized independent
public accountants (who may also render other services to the Servicer or the
Banks) to furnish a report to the effect that such firm has examined certain
documents and records relating to the servicing of the Accounts, compared the
information contained in the Servicer's certificates delivered during the
period covered by the report with such documents and records and that, on the
basis of such examination, such firm is of the opinion that such servicing was
conducted in compliance with the Pooling Agreement and the applicable
provisions of each Supplement except for such exceptions or errors as such
firm shall believe to be immaterial and such other exceptions as shall be set
forth in such statement.
 
  The Pooling Agreement provides for delivery to the Trustee, the Rating
Agency and each provider of Series Enhancement on or before March 31 of each
calendar year of a statement signed by an officer of the Servicer to the
effect that the Servicer has, or has caused to be, fully performed its
obligations in all material respects under the Pooling Agreement throughout
the preceding year or, if there has been a default in the performance of any
such obligation, specifying the nature and status of the default.
 
 
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<PAGE>
 
  Copies of all statements, certificates and reports furnished to the Trustee
may be obtained by a request in writing delivered to the Trustee.
 
AMENDMENTS
 
  The Pooling Agreement and any Supplement may be amended from time to time
(including in connection with the issuance of a Supplemental Certificate) by
agreement of the Trustee and the Banks without the consent of the investor
certificateholders of any Series or the consent of the provider of any Series
Enhancement (a) to modify the dates from and to which a Due Period runs
provided that such amendment does not cause an Adverse Effect or a Ratings
Effect or (b) for any other purpose, provided that (i) the Banks deliver an
opinion of counsel acceptable to the Trustee to the effect that such amendment
will not adversely affect in any material respect the interests of any such
investor certificateholder and (ii) such amendment will not result in a
Ratings Effect.
 
  The Pooling Agreement and any Supplement may be modified from time to time
by agreement of the Trustee, the Banks and the Servicer, without the consent
of the investor certificateholders of any Series, to provide for additional
Series Enhancement for the benefit of the Class A Certificateholders and/or
the Class B Certificateholders; provided that (a) each Bank delivers to the
Trustee and each Series Enhancer a certificate of an authorized officer to the
effect that, in the reasonable belief of the Bank, such amendment will not as
of the date of such amendment or at a future date cause an Adverse Effect and
(b) such amendment will not result in a Ratings Effect.
 
  The Pooling Agreement and any Supplement may also be amended from time to
time (including in connection with the issuance of a Supplemental Certificate)
by the Banks, the Servicer and the Trustee with the consent of the holders of
investor certificates evidencing not less than 66 2/3% of the aggregate unpaid
principal amount of the investor certificates of all adversely affected Series
for the purpose of adding any provisions to or changing in any manner or
eliminating any of the provisions of the Pooling Agreement or any Supplement
or of modifying in any manner the rights of such investor certificateholders.
No such amendment, however, may (a) reduce in any manner the amount of or
delay the timing of any distributions to be made to investor
certificateholders or deposits of amounts to be so distributed or the amount
available under any Series Enhancement without the consent of each investor
certificateholder affected; (b) change the definition or the manner of
calculating the interest of any investor certificateholder without the consent
of each affected investor certificateholder; (c) reduce the aforesaid
percentage required to consent to any such amendment, without the consent of
each investor certificateholder; or (d) adversely affect the rating of any
Series or class by the Rating Agency without the consent of the holders of
investor certificates of such Series or class evidencing not less than 66 2/3%
of the aggregate unpaid principal amount of the investor certificates of such
Series or class. Promptly following the execution of any such amendment (other
than an amendment described in the two preceding paragraphs), the Trustee will
furnish written notice of the substance of such amendment to each investor
certificateholder. Notwithstanding the foregoing, no amendment may be made to
the Pooling Agreement or any Supplement which would adversely affect in any
material respect the interests of the provider of any Series Enhancement
without the consent of the provider of such Series Enhancement.
 
THE TRUSTEE
 
  Bankers Trust Company is the Trustee under the Pooling Agreement. The
Corporate Trust Office of Bankers Trust Company is located at Four Albany
Street, 10th Floor, New York, New York 10006. The Banks, the Servicer and
their respective affiliates may from time to time enter into normal banking
and trustee relationships with the Trustee and its affiliates. The Trustee,
the Banks, the Servicer and any of their respective affiliates may hold
investor certificates of any Series in their own names; however, any investor
certificates so held shall not be entitled to participate in any decisions
made or instructions given to the Trustee by such investor certificateholders
as a group. In addition, for purposes of meeting the legal requirements of
certain local jurisdictions, the Trustee shall have the power to appoint a co-
trustee or separate trustees of all or any part of the Trust. In the event of
such appointment, all rights, powers, duties and obligations shall be
conferred or imposed upon the Trustee and such separate trustee or co-trustee
jointly, or, in any jurisdiction in which the Trustee shall
 
                                      65
<PAGE>
 
be incompetent or unqualified to perform certain acts, singly upon such
separate trustee or co-trustee, who shall exercise and perform such rights,
powers, duties and obligations solely at the direction of the Trustee.
 
  The Trustee may resign at any time, in which event the Banks will be
obligated to appoint a successor Trustee. The Servicer may also remove the
Trustee if the Trustee ceases to be eligible to continue as such under the
Pooling Agreement or if the Trustee becomes insolvent. In such circumstances,
the Servicer will be obligated to appoint a successor Trustee. Any resignation
or removal of the Trustee and appointment of a successor Trustee does not
become effective until acceptance of the appointment by the successor Trustee.
 
                   CERTAIN LEGAL ASPECTS OF THE RECEIVABLES
 
TRANSFER OF RECEIVABLES
 
  The Banks have sold the Receivables to the Trust. The Banks have represented
and warranted that such sale constitutes a valid transfer and assignment to
the Trust of all right, title and interest of the Banks in and to the
Receivables, except for the interest of the Banks as holder of the Banks'
Certificate, and that if such assignment does not constitute a sale of the
Receivables, it constitutes a grant of a security interest to the Trust in and
to the Receivables. The Banks have also represented and warranted to the Trust
in the Pooling Agreement that, in the event the transfer of Receivables by the
Banks to the Trust is deemed to create a security interest under the UCC,
there will exist a valid, subsisting and enforceable first priority perfected
security interest in the Receivables, in existence at the time of the
formation of the Trust or at the date of addition of any Additional Accounts,
in favor of the Trust and a valid, subsisting and enforceable first priority
perfected security interest in the Receivables created thereafter in favor of
the Trust on and after their creation, in each case until termination of the
Trust. For a discussion of the Trust's rights arising from these
representations and warranties not being satisfied, see "The Pooling Agreement
Generally--Representations and Warranties".
 
  The Banks have represented that the Receivables are "accounts" or "general
intangibles" for purposes of the UCC. Both the sale of accounts and the
transfer of accounts as security for an obligation are treated under the UCC
as creating a security interest therein and are subject to its provisions, and
the filing of an appropriate financing statement or statements is required to
perfect the interest of the Trust in the Receivables. If a transfer of general
intangibles is deemed to create a security interest, the UCC applies and
filing an appropriate financing statement or statements is also required in
order to perfect the Trust's security interest. Financing statements covering
the Receivables have been filed under the UCC to protect the Trust in the
event the transfer by the Banks is deemed to be subject to the UCC. If a
transfer of general intangibles is deemed to be a sale, then the UCC is not
applicable and no further action under the UCC is required to protect the
Trust's interest from third parties.
 
  There are certain limited circumstances under the UCC in which prior or
subsequent transferees of Receivables coming into existence after the date of
the Pooling Agreement could have an interest in such Receivables with priority
over the Trust's interest. A tax or other government lien on property of the
Bank arising prior to the time a Receivable comes into existence may also have
priority over the interest of the Trust in such Receivable. Furthermore, if
the FDIC were appointed as a receiver of either of the Banks, the receiver's
administrative expenses may also have priority over the interest of the Trust
in such Receivables. Under the Pooling Agreement, however, the Banks warrant
that they have transferred the Receivables to the Trust free and clear of the
lien of any third party. In addition, the Banks covenant that they will not
sell, pledge, assign, transfer or grant any lien on any Receivable (or any
interest therein) other than to the Trust.
 
CERTAIN MATTERS RELATING TO RECEIVERSHIP
 
  The Federal Deposit Insurance Act ("FDIA"), as amended by the Financial
Institutions Reform, Recovery, and Enforcement Act of 1989 ("FIRREA"), which
became effective August 9, 1989, sets forth certain powers that the FDIC could
exercise if it were appointed as receiver or conservator of either of the
Banks.
 
 
                                      66
<PAGE>
 
  Subject to clarification by FDIC regulations or interpretations, it would
appear from the positions taken by the FDIC that the FDIC, in its capacity as
receiver or conservator for either of the Banks, would not interfere with the
timely transfer to the Trust of payments collected on the Receivables or
interfere with the timely liquidation of Receivables as described below. To
the extent that the Banks have granted a security interest in the Receivables
to the Trust, and such security interest is validly perfected before an
Insolvency Event and is not taken in contemplation of insolvency or with the
intent to hinder, delay or defraud the relevant Bank or its creditors, based
upon opinions issued by the general counsel of the FDIC addressing the
enforceability against the FDIC, as conservator or receiver for a depository
institution, of a security interest in collateral granted by such depository
institution, such security interest should not be subject to avoidance, and
payments to the Trust with respect to the Receivables should not be subject to
recovery, by the FDIC. If, however, the FDIC were to assert a contrary
position, certain provisions of the FDIA which, at the request of the FDIC,
have been applied in recent lawsuits to avoid security interests in collateral
granted by depository institutions, would permit the FDIC to avoid such
security interest, thereby resulting in possible delays and reductions in
payments to the investor certificateholders of all outstanding Series. In
addition, if the FDIC were to require the Trustee to establish its right to
such payments by submitting to and completing the administrative claims
procedure under the FDIA, as amended by FIRREA, delays in payments on the
investor certificates of all Series and possible reductions in the amount of
those payments could occur.
 
  The Pooling Agreement provides that, upon the occurrence of an Insolvency
Event, the Banks will promptly give notice thereof to the Trustee, and an
Early Amortization Event will occur. Under the Pooling Agreement, no new
Principal Receivables will be transferred to the Trust and, unless otherwise
instructed within a specified period by each other holder of the Banks'
Certificate and the investor certificateholders holding investor certificates
of each Series or each class of each Series evidencing more than 50% of the
aggregate unpaid principal amount of each such Series or class (and, in the
case of certain Series, any credit enhancer with respect thereto), or unless
otherwise prohibited by law, the Trustee will proceed to sell, dispose of or
otherwise liquidate the Receivables in a commercially reasonable manner and on
commercially reasonable terms. The proceeds from the sale of the Receivables
would then be treated by the Trustee as collections on the Receivables. This
procedure, however, could be delayed as described above. Upon the occurrence
of an Insolvency Event, if no Early Amortization Event other than such
Insolvency Event exists, the FDIC may have the power to continue to require
the Banks to transfer new Principal Receivables to the Trust and to prevent
the early sale, liquidation or disposition of the Receivables and the
commencement of the Early Amortization Period. See "Series Provisions--Early
Amortization Events".
 
  In the event of a Servicer Default, if a conservator, receiver or liquidator
is appointed for the Servicer, and no Servicer Default other than such
conservatorship, receivership, liquidation or insolvency of the Servicer
exists, the conservator, receiver or liquidator may have the power to prevent
either the Trustee or the requisite percentage of holders of investor
certificates of all Series from appointing a successor Servicer. See "The
Pooling Agreement Generally--Servicer Default".
 
CONSUMER PROTECTION LAWS
 
  The relationship between the cardholder and credit card issuer is
extensively regulated by federal, state and local consumer protection laws.
With respect to credit cards issued by Citibank (South Dakota), the most
significant federal laws include the Federal Truth-in-Lending, Equal Credit
Opportunity, Fair Credit Reporting and Fair Debt Collection Practices Acts.
These statutes impose disclosure requirements before and when an Account is
opened, at the end of monthly billing cycles, and at year-end and, in
addition, limit cardholder liability for unauthorized use, prohibit certain
discriminatory practices in extending credit, impose certain limitations on
the type of account-related charges that may be issued and regulate collection
practices. In addition, cardholders are entitled under these laws to have
payments and credits applied to the credit card account promptly and to
require billing errors to be resolved promptly. The Trust may be liable for
certain violations of consumer protection laws that apply to the Receivables,
either as assignee from the Banks with respect to obligations arising before
transfer of the Receivables to the Trust or as the party directly responsible
for obligations arising after the transfer. In addition, a cardholder may be
entitled to assert such violations by way of set-off against the
 
                                      67
<PAGE>
 
obligation to pay the amount of Receivables owing. See "Special
Considerations--Master Trust Considerations--Certain Legal Aspects" and "--The
Ability of Citibank (South Dakota) to Change Terms of the Accounts". All
Receivables that were not created in compliance in all material respects with
the requirements of such laws, if such noncompliance has a material adverse
effect on the interest of investor certificateholders of any Series therein,
will be reassigned to the Banks. The Servicer has also agreed in the Pooling
Agreement to indemnify the Trust, among other things, for any liability
arising from such violations. For discussion of the Trust's rights if the
Receivables were not created in compliance in all material respects with
applicable laws, see "The Pooling Agreement Generally--Representations and
Warranties".
 
  The Soldiers' and Sailors' Civil Relief Act of 1940 allows individuals on
active duty in the military to cap the interest rate on debts incurred before
the call to active duty at 6%. In addition, subject to judicial discretion,
any action or court proceeding in which an individual in military service is
involved may be stayed if the individual's rights would be prejudiced by
denial of such a stay.
 
  Application of federal and state bankruptcy and debtor relief laws would
affect the interests of the investor certificateholders of all Series if such
laws result in any Receivables being charged off as uncollectible. See "Series
Provisions--Investor Charge-Offs" and "--Defaulted Receivables; Recoveries;
Rebates and Fraudulent Charges".
 
                                  TAX MATTERS
 
FEDERAL INCOME TAX CONSEQUENCES--GENERAL
 
  Unless a superseding discussion is set forth in the applicable Prospectus
Supplement, set forth below is a discussion of the federal income tax
consequences to holders of the Investor Certificates. This discussion does not
deal with all aspects of federal income taxation that may be relevant to
holders of the Investor Certificates in light of their personal investment
circumstances, nor to certain types of holders subject to special treatment
under the federal income tax laws (for example, banks, life insurance
companies and tax-exempt organizations). Prospective investors are advised to
consult their own tax advisors with regard to the federal income tax
consequences of holding and disposing of Investor Certificates, as well as the
tax consequences arising under the laws of any state, foreign country or other
jurisdiction. This discussion is based upon present provisions of the Internal
Revenue Code of 1986, as amended (the "Code"), the regulations promulgated
thereunder, and judicial or ruling authority, all of which are subject to
change, which change may be retroactive. No ruling on any of the issues
discussed below will be sought from the Internal Revenue Service (the "IRS").
 
  The discussion assumes that an Investor Certificate is issued in registered
form, has all payments denominated in U.S. dollars and has a term that exceeds
one year. Moreover, the discussion assumes that the interest formula for the
Investor Certificate meets the requirements for "qualified stated interest"
under Treasury regulations (the "OID regulations") relating to OID, and that
any OID on the Investor Certificate arising from any excess of the principal
amount of the Investor Certificate over its issue price is de minimis (i.e.,
is less than 1/4% of its principal amount multiplied by the number of full
years until its maturity date), all within the meaning of the OID regulations.
If those conditions are not satisfied, additional tax considerations will be
disclosed in the applicable Prospectus Supplement.
 
 Treatment of the Investor Certificates as Indebtedness
 
  The Banks and Investor Certificateholders will express in the Pooling
Agreement the intent that for federal, state and local income and franchise
tax purposes, the Investor Certificates will be indebtedness of the Banks
secured by the Receivables. The Banks, by entering into the Pooling Agreement,
and each investor, by the acceptance of an Investor Certificate, will agree to
treat the Investor Certificates as indebtedness of the Banks for federal,
state and local income and franchise tax purposes. However, the Pooling
Agreement generally refers to the transfer of Receivables as a "sale", and
because different criteria are used in determining the nontax
 
                                      68
<PAGE>
 
accounting treatment of the transaction, the Banks will treat the Pooling
Agreement, for certain nontax accounting purposes, as a transfer of an
ownership interest in the Receivables and not as creating a debt obligation of
the Banks.
 
  A basic premise of federal income tax law is that the economic substance of
a transaction generally determines the tax consequences. The form of a
transaction, while a relevant factor, is not conclusive evidence of its
economic substance. In appropriate circumstances, the courts have allowed
taxpayers, as well as the IRS, to treat a transaction in accordance with its
economic substance, as determined under federal income tax law, even though
the participants in the transaction have characterized it differently for
nontax purposes.
 
  The determination of whether the economic substance of a purchase of an
interest in property is instead a loan secured by the transferred property has
been made by the IRS and the courts on the basis of numerous factors designed
to determine whether the seller has relinquished (and the purchaser has
obtained) substantial incidents of ownership in the property. Among those
factors, the primary factors examined are whether the purchaser has the
opportunity to gain if the property increases in value, and has the risk of
loss if the property decreases in value. Based upon its analysis of such
factors, Cravath, Swaine & Moore, special federal tax counsel to the Banks and
the Trust ("Tax Counsel"), has concluded that the Banks and any other owners
of the Banks' Certificate (through their ownership of the Banks' Certificate)
rather than the holders of Investor Certificates (through their ownership of
the Investor Certificates) are the owners of the Receivables for federal
income tax purposes. As a result, in the opinion of Tax Counsel, the Investor
Certificates will properly be characterized for federal income tax purposes as
indebtedness.
 
 Treatment of the Trust
 
  The Trust could be viewed for federal income tax purposes either as (i) a
collateral arrangement for debt issued directly by the Banks and other holders
of the Banks' Certificate or (ii) as a separate entity issuing its own debt
and owned by the Banks and all other holders of the Banks' Certificate.
However, in the opinion of Tax Counsel, in the former event the Trust will be
disregarded for federal income tax purposes and in the latter event the Trust
would be a partnership, rather than an association (or publicly traded
partnership) taxable as a corporation. Therefore, in the opinion of Tax
Counsel, the Trust will not be subject to federal income tax.
 
  In addition, recently enacted tax legislation permits the Trust to make an
election to be a Financial Asset Securitization Investment Trust. Prior to
making such election, the Banks will deliver an opinion of counsel acceptable
to the Trustee that (1) following such election the Trust will not be an
association (or publicly traded partnership) taxable as a corporation, and (2)
the election will not have a significant adverse effect on the federal income
tax treatment of holders of any then-outstanding investor certificates.
 
FEDERAL INCOME TAX CONSEQUENCES--UNITED STATES INVESTORS
 
 Interest Income to Investor Certificateholders
 
  Assuming the Investor Certificates are debt obligations for federal income
tax purposes, it is believed that they should not be considered issued with
OID (except as discussed in the following paragraph or the Prospectus
Supplement). Under this interpretation, interest thereon will be taxable as
ordinary interest income when received or accrued by holders utilizing the
cash or accrual methods of accounting, respectively. Moreover, a holder of an
Investor Certificate issued with a de minimis amount of OID must include such
OID in income, on a pro rata basis, as principal payments are made on the
Investor Certificate. A purchaser who buys an Investor Certificate for more or
less than its principal amount will generally be subject, respectively, to the
premium amortization or market discount rules of the Code.
 
  However, if any interest payable on a Series or Class of Investor
Certificates is not paid in full on its scheduled payment date, the Investor
Certificates of that Series or Class will thereafter be considered to be
issued with OID. Moreover, even before that time, the Investor Certificates of
a Series or Class would be considered to
 
                                      69
<PAGE>
 
have OID unless, at the time of issuance, the likelihood of a late payment or
nonpayment of interest on such Series or Class was considered a "remote
contingency" under applicable Treasury regulations. The Sellers intend to take
the position, based on the exception for remote contingencies, that OID does
not arise on a Series or Class of Investor Certificates unless and until a
late payment or nonpayment of interest in fact occurs.
 
  If the Investor Certificates of a Series or Class were considered to have
OID (either initially or following a late payment or nonpayment of interest),
there would not be a significant effect on holders of Investor Certificates.
However, cash basis holders would in effect be required to report interest
income as it accrues rather than when it is paid. Moreover, all holders would
be required to accrue any de minimis discount into income over the life of the
Investor Certificates rather than when principal is paid.
 
  The Paying Agent will be required to report annually to the IRS, and to each
Investor Certificateholder of record, the amount of interest paid (or OID
accrued) on Investor Certificates (and the amount of interest withheld for
federal income taxes, if any) for each calendar year, except as to exempt
holders (generally, holders that are corporations, tax-exempt organizations,
qualified pension and profit-sharing trusts, individual retirement accounts,
or nonresident aliens who provide certification as to their status as
nonresidents). As long as the only "Certificateholder" of record is Cede, as
nominee for DTC, Investor Certificateholders and the IRS will receive tax and
other information only from Participants and Indirect Participants rather than
the Paying Agent. Accordingly, each nonexempt Investor Certificateholder will
be required to provide, under penalties of perjury, a certificate on IRS Form
W-9 containing the holder's name, address, correct federal taxpayer
identification number and a statement that such holder is not subject to
backup withholding. If a nonexempt Investor Certificateholder fails to provide
the required certification, the Paying Agent (or the Participants or Indirect
Participants) will be required to withhold (or cause to be withheld) 31% of
the interest (and principal) otherwise payable to the holder, and remit the
withheld amount to the IRS as a credit against the holder's federal income tax
liability.
 
 Possible Classification of the Investor Certificates as Interests in a
Partnership or Association
 
  Although, as described above, it is the opinion of Tax Counsel that all
Investor Certificates will properly be characterized as debt for federal
income tax purposes, such opinion is not binding on the IRS and thus no
assurance can be given that such a characterization will prevail. If the IRS
were to contend successfully that some or all of the Investor Certificates
were not debt obligations for federal income tax purposes, the arrangement
among the Banks, any other holders of the Banks' Certificate, the holders of
such Investor Certificates and any other holders of other Investor
Certificates might be classified as a partnership for federal income tax
purposes, as an association taxable as a corporation or as a "publicly traded
partnership" taxable as a corporation.
 
  If some or all of the Investor Certificates are treated as equity interests
in a partnership, the partnership would in all likelihood be treated as a
"publicly traded partnership". A publicly traded partnership is, in general,
taxable as a corporation. If the partnership were nevertheless not taxable as
a corporation (because of an exception for an entity whose income is interest
income that is not derived in the conduct of a financial business) it would
not be subject to federal income tax. Rather, each item of income, gain, loss,
deduction and credit generated through the ownership of the Receivables by the
partnership would be passed through to the partners in such a partnership
(including holders of Investor Certificates that are treated as equity
interests in the partnership) according to their respective interests therein.
 
  The income reportable by Investor Certificateholders as partners in such a
partnership could differ from the income reportable by Investor
Certificateholders as holders of debt. However, except as provided below, it
is not expected that such differences would be material. A cash basis Investor
Certificateholder treated as a partner might be required to report income when
it accrues to the partnership rather than when it is received by the Investor
Certificateholder. Moreover, an individual Investor Certificateholder's share
of expenses of the partnership would be miscellaneous itemized deductions that
might not be deductible in whole or in part, meaning that the holder might be
taxed on a greater amount of income than the stated interest on the Investor
 
                                      70
<PAGE>
 
Certificates. Finally, if any Investor Certificates are treated as equity
interests in a partnership in which other Investor Certificates are debt, all
or part of a tax-exempt investor's share of income from the Investor
Certificates that are treated as equity would be treated as unrelated debt-
financed income under the Code taxable to the investor.
 
  If, alternatively, some or all of the Investor Certificates were treated as
equity interests in an association taxable as a corporation or a "publicly
traded partnership" taxable as a corporation, the resulting entity would be
subject to federal income taxes at corporate tax rates on its taxable income
generated by ownership of the Receivables. Moreover, distributions by the
entity on such Investor Certificates and the Banks' Certificate would probably
not be deductible in computing the entity's taxable income and distributions
to such Investor Certificateholders would probably be treated as dividend
income to such holders. Such an entity-level tax could result in reduced
distributions to all Investor Certificateholders, and the holders of Investor
Certificates that are treated as equity could also be liable for a share of
such a tax.
 
  Since the Banks will treat the Investor Certificates as indebtedness for
federal income tax purposes, the Paying Agent (and Participants and Indirect
Participants) will not comply with the tax reporting requirements that would
apply under those alternative characterizations of the Investor Certificates.
 
FEDERAL INCOME TAX CONSEQUENCES--NON-UNITED STATES INVESTORS
 
  Tax Counsel has given its opinion that the Investor Certificates will
properly be classified as debt for federal income tax purposes. If the
Investor Certificates are treated as debt:
 
    (a) interest or OID paid to a nonresident alien or foreign corporation or
  partnership would be exempt from U.S. withholding taxes (including backup
  withholding taxes), provided the holder complies with applicable
  identification requirements (and does not actually or constructively own
  10% or more of the voting stock of Citicorp, is not a controlled foreign
  corporation with respect to Citicorp, and does not bear certain
  relationships to holders of the Banks' Certificate other than the Banks).
  Applicable identification requirements will be satisfied if there is
  delivered to a securities clearing organization (or bank or other financial
  institution that holds Investor Certificates on behalf of the customer in
  the ordinary course of its trade or business) (i) IRS Form W-8 signed under
  penalties of perjury by the beneficial owner of the Investor Certificates
  stating that the holder is not a U.S. person and providing such holder's
  name and address, (ii) IRS Form 1001 signed by the beneficial owner of the
  Investor Certificates or such owner's agent claiming exemption from
  withholding under an applicable tax treaty, or (iii) IRS Form 4224 signed
  by the beneficial owner of the Investor Certificates or such owner's agent
  claiming exemption from withholding of tax on income connected with the
  conduct of a trade or business in the United States; provided that in any
  such case (x) the applicable form is delivered pursuant to applicable
  procedures and is properly transmitted to the United States entity
  otherwise required to withhold tax and (y) none of the entities receiving
  the form has actual knowledge that the holder is a U.S. person or that any
  certification on the form is false;
 
    (b) a holder of an Investor Certificate who is a nonresident alien or
  foreign corporation will not be subject to United States federal income tax
  on gain realized on the sale, exchange or redemption of such Investor
  Certificate, provided that (i) such gain is not effectively connected to a
  trade or business carried on by the holder in the United States, (ii) in
  the case of a holder that is an individual, such holder is not present in
  the United States for 183 days or more during the taxable year in which
  such sale, exchange or redemption occurs, and (iii) in the case of gain
  representing accrued interest or OID, the conditions described in clause
  (a) are satisfied; and
 
    (c) an Investor Certificate held by an individual who at the time of
  death is a nonresident alien will not be subject to United States federal
  estate tax as a result of such individual's death if, immediately before
  his death, (i) the individual did not actually or constructively own 10% or
  more of the voting stock of Citicorp, and does not bear certain
  relationships to holders of the Banks' Certificate other than the Banks and
  (ii) the holding of such Investor Certificate was not effectively connected
  with the conduct by the decedent of a trade or business in the United
  States.
 
                                      71
<PAGE>
 
  If the IRS were to contend successfully that some or all of the Investor
Certificates are equity interests in a partnership (not taxable as a
corporation), a holder of such an Investor Certificate that is a nonresident
alien or foreign corporation might be required to file a U.S. individual or
corporate income tax return and pay tax on its share of partnership income at
regular U.S. rates, including in the case of a corporation the branch profits
tax (and would be subject to withholding tax on its share of partnership
income). If some or all of the Investor Certificates are recharacterized as
equity interests in an association taxable as a corporation or a "publicly
traded partnership" taxable as a corporation, to the extent distributions on
such Investor Certificates were treated as dividends, a nonresident alien
individual or foreign corporation would generally be taxed on the gross amount
of such dividends (and subject to withholding) at the rate of 30% unless such
rate were reduced by an applicable treaty.
 
STATE AND LOCAL TAX CONSEQUENCES
 
  This discussion is based upon present provisions of the South Dakota
statutes and the regulations promulgated thereunder, and applicable judicial
or ruling authority, all of which are subject to change, which change may be
retroactive. No ruling on any of the issues discussed below will be sought
from the South Dakota Department of Revenue. The activities to be undertaken
by Citibank (South Dakota) in servicing and collecting the Receivables will
take place in South Dakota. The State of South Dakota has no state individual
income tax and no state general corporate income tax. However, South Dakota
does have a financial institution franchise tax which is based upon the net
income of financial institutions doing business in the State of South Dakota.
Financial institutions are defined under South Dakota law to include persons
or entities in the business of buying loans, notes or other evidences of debt.
 
  If the Investor Certificates are treated as debt of the Banks for federal
income tax purposes, in the opinion of Davenport, Evans, Hurwitz & Smith,
L.L.P., South Dakota tax counsel to the Banks and the Trust ("South Dakota Tax
Counsel"), this treatment will also apply for South Dakota tax purposes, and
the Trust, as an entity, will not be subject to taxation in South Dakota as a
financial institution. Moreover, pursuant to this treatment, Investor
Certificateholders not otherwise subject to South Dakota Tax would not become
subject to such tax solely because of their ownership of Investor
Certificates. Investor Certificateholders already subject to taxation in South
Dakota as financial institutions, however, could be required to pay tax on the
income generated from ownership of Investor Certificates.
 
  In the alternative, if the Trust is treated for federal income tax purposes
either (i) as a partnership (not taxable as a corporation) between the Banks
and any other owners of the Banks' Certificate (of which all of the Investor
Certificateholders are treated as creditors), or (ii) as a partnership (not
taxable as a corporation) among the Banks, any other owners of the Banks'
Certificate and some or all of the Investor Certificateholders (in which other
Investor Certificateholders are treated as creditors), in the opinion of South
Dakota Tax Counsel, the same treatment should also apply for South Dakota tax
purposes. In such case, South Dakota would likely view the partnership as
doing business in South Dakota. As a result, the entity would likely be
subject to the South Dakota financial institution franchise tax. Such taxes
could result in reduced distributions to Investor Certificateholders. However,
classification of the Trust as a partnership or of some or all of the Investor
Certificates as equity interests in a partnership would not cause an Investor
Certificateholder not otherwise subject to taxation in South Dakota as a
financial institution to become subject to South Dakota taxes as a result of
its mere ownership of Investor Certificates.
 
  If the Trust were instead treated as an association taxable as a corporation
or a "publicly traded partnership" taxable as a corporation, then the entity
would likely be subject to the South Dakota financial institution franchise
tax. Such taxes could result in reduced distributions to Investor
Certificateholders. An Investor Certificateholder not otherwise subject to tax
in South Dakota would not become subject to South Dakota taxes as a result of
its mere ownership of such an interest.
 
  Because each state's income tax laws vary, it is impossible to predict the
income tax consequences to the Investor Certificateholders in all of the state
taxing jurisdictions in which they are already subject to tax. Investor
Certificateholders are urged to consult their own tax advisors with respect to
state income and franchise taxes.
 
                                      72
<PAGE>
 
                             ERISA CONSIDERATIONS
 
GENERAL
 
  Title I of the Employee Retirement Income Security Act of 1974, as amended
("ERISA") and Section 4975 of the Code impose certain restrictions on employee
benefit plans subject to those provisions, including typical pension, profit-
sharing and Keogh plans, individual retirement accounts (in the case of
Section 4975) and entities whose assets are deemed to include assets of such
plans (collectively, "Benefit Plans"). ERISA also imposes responsibilities on
fiduciaries of Benefit Plans. A fiduciary of a Benefit Plan should consider,
among other things, whether an investment in Investor Certificates is prudent,
is permitted by the documents governing the plan, and is appropriate in light
of the plan's investment policy and portfolio.
 
  Section 406 of ERISA prohibits a fiduciary of a Benefit Plan from causing
the plan to engage directly or indirectly in specified categories of
transactions with "parties in interest" with respect to the plan. Similarly,
Section 4975 of the Code imposes an excise tax on specified categories of
transactions between a Benefit Plan and a "disqualified person" with respect
to the plan. These transactions, referred to as "prohibited transactions", can
result in excise tax and other liabilities on fiduciaries, disqualified
persons, and others under ERISA and the Code. However, statutory and
administrative exemptions are available from the prohibited transaction rules.
Unless an exemption were available, a prohibited transaction would arise, for
example, if an Investor Certificate were viewed as debt of the Banks and a
Bank was a party in interest with respect to a Benefit Plan that acquired the
Investor Certificate.
 
  Moreover, under a Department of Labor regulation (the "Plan Asset
Regulation"), unless an exception applies, assets of the Trust might be deemed
to include assets of any Benefit Plan that holds an Investor Certificate. This
could result in additional prohibited transactions, because each transaction
involving Trust assets would be deemed to involve the use of assets of each
such plan. For example, if a participant in any Benefit Plan holding Investor
Certificates was a cardholder of one of the Accounts, a prohibited transaction
could arise (because the individual would be a party in interest with respect
to such plan). There are a number of class exemptions issued by the Department
of Labor that could apply in such event. However, there is no assurance that
any exception to the Plan Asset Regulation will be available with respect to
the Investor Certificates, or that any such class exemption will apply to all
transactions involving the Trust Assets.
 
  The Banks have received an administrative exemption from the Department of
Labor (discussed below) that, if applicable, would exempt certain transactions
from the prohibited transaction rules in connection with a Benefit Plan's
acquisition of Class A Certificates. In addition, certain transactions
concerning Benefit Plans holding either Class A Certificates or Class B
Certificates would not be prohibited transactions, if, under the Plan Asset
Regulations, assets of the Trust were not considered assets of Benefit Plans
holding Investor Certificates.
 
THE BANKS' PROHIBITED TRANSACTION EXEMPTION
 
  The Department of Labor has granted to the Banks an administrative exemption
that, if applicable, excludes certain transactions relating to the Trust and
the Class A Certificates from the prohibited transaction rules. See Prohibited
Transaction Exemption No. 98-14, 63 Federal Register 17027 (April 7, 1998)
(the "Exemption"). If the conditions of the Exemption are satisfied, the
Exemption applies to the acquisition, holding and disposition of Class A
Certificates by a Benefit Plan, as well as to transactions relating to Class A
Certificates in connection with the servicing, management and operation of the
Trust. No assurance can be given, however, that even if the conditions of the
Exemption are satisfied, the Exemption will exclude all transactions involving
the Trust and the Class A Certificates from the prohibited transaction rules.
Moreover, the Exemption applies in only a limited fashion to a Benefit Plan
sponsored by (a) the Banks, the Trustee, or the Servicer, or, with respect to
any particular Series, an underwriter, a party providing credit support, or
the counterparty on an interest rate swap or cap with respect to such Series,
or (b) any affiliate of any of the foregoing.
 
  A number of the requirements of the Exemption relate to the general
structure and operation of the Trust, such as the Trustee, the assets of the
Trust, the Banks' Interest, transfers of Receivables into and out of the
Trust,
 
                                      73
<PAGE>
 
and the operation of the Trust in accordance with the Pooling Agreement. The
Banks believe that the Trust satisfies these conditions.
 
  Other requirements of the Exemption relate to the terms and conditions of
the particular Class A Certificates to be acquired by Benefit Plans. These
requirements include the requirements that (1) the Class A Certificates cannot
be subordinated to any other similar interests in the Trust, (2) the Class A
Certificates must be rated, at the time of their acquisition by the Benefit
Plan, in one of the two highest rating categories by at least one rating
agency (or, if they have a maturity of one year or less, have the highest
short-term rating) and have certain specified levels of credit support, (3)
certain other rating agency conditions must be satisfied, (4) the Series of
Investor Certificates must be subject to early amortization or cash
accumulation under certain circumstances, (5) any interest rate swaps and caps
must meet certain conditions, (6) the Class A Certificates must be sold
initially in an underwriting or private placement, including a placement by
underwriters or dealers on behalf of the Trust, and (7) such initial sale must
be by an entity that received an individual "Underwriter Exemption" from the
Department of Labor, an affiliate of such an entity, or a member of a selling
group of which such an entity or affiliate is a manager or co-manager. The
Prospectus Supplement for each Series of Class A Certificates will state
whether the Banks believe that the conditions of the Exemption relating to the
terms and conditions of such Class A Certificates will be satisfied at the
time of initial issuance of the Certificates.
 
  Even if the terms and conditions of a particular Series of Class A
Certificates satisfy the requirements of the Exemption, a particular Benefit
Plan will be eligible for the benefits of the Exemption only if certain other
conditions are satisfied. The fiduciary of the Benefit Plan must itself
determine whether these conditions are satisfied. These conditions include but
are not limited to the following:
 
    1. The acquisition of Class A Certificates must be on terms (including
  price) that are at least as favorable to the Benefit Plan as such terms
  would be in an arm's length transaction with an unrelated party.
 
    2. Amounts retained by underwriters or selling agents for selling or
  placing the Class A Certificates must be reasonable in amount, the Series
  Servicing Fee must be reasonable in amount, and the amounts received by the
  Banks upon the sale of Receivables to the Trust cannot exceed the fair
  market value of the Receivables.
 
    3. The Benefit Plan must be an "accredited investor" as defined in Rule
  501(a)(1) of Regulation D under the Securities Act.
 
    4. If the particular Class A Certificates are supported by one or more
  interest rate swaps or caps, the decision to acquire the Class A
  Certificates must be made by an independent fiduciary that is qualified to
  analyze and understand the terms of the swaps or caps and any resulting
  effect on the credit rating of the Class A Certificates. Moreover, such
  fiduciary must be either a "QPAM" or "INHAM" as described in the applicable
  Department of Labor Prohibited Transaction Exemptions, or a plan fiduciary
  with at least $100 million of total assets under management.
 
    5. In order for an acquisition of Class A Certificates by a Benefit Plan
  to be exempt from certain of the prohibited transaction rules concerning
  "self dealing" (i.e., Sections 406(b)(1) and (2) of ERISA and Section
  4975(c)(1)(E) of the Code), the Exemption imposes certain additional
  requirements relating to the particular Benefit Plan. See Section I.B. of
  the Exemption. Benefit Plans investing in Class A Certificates should
  carefully consider whether or not they need to rely on these particular
  provisions of the Exemption and, if so, whether they satisfy the
  requirements of Section I.B.
 
  More generally, prior to making an investment in Class A Certificates in
reliance on the Exemption, a fiduciary of a Benefit Plan should carefully
consider the terms of the Exemption, the terms of the Class A Certificates,
the eligibility of the Class A Certificates for the Exemption in light of
(among other factors) the identity of the particular Benefit Plan, and whether
the Exemption will protect against all potential prohibited transactions.
 
                                      74
<PAGE>
 
THE PLAN ASSET REGULATION
 
  Under an exception contained in the Plan Asset Regulation, the Trust would
not be deemed to hold Benefit Plan assets if the Benefit Plan acquired a
"publicly offered security" issued by the Trust. In such event, certain
prohibited transactions would not arise even if the Exemption did not apply.
Under the Plan Asset Regulation, a publicly offered security is a security
that is (i) freely transferable, (ii) part of a class of securities that is
owned by 100 or more investors independent of the issuer and of one another at
the conclusion of the initial offering and (iii) either is (A) part of a class
of securities registered under Section 12(b) or 12(g) of the Exchange Act, or
(B) sold to the Benefit Plan as part of an offering of securities to the
public pursuant to an effective registration statement under the Securities
Act and the class of securities of which such security is a part is registered
under the Exchange Act within 120 days (or such later time as may be allowed
by the Commission) after the end of the fiscal year of the issuer during which
the offering of such securities to the public occurred.
 
  The Class A Certificates of each Series and the Class B Certificates of each
Series must be separately tested under, and may each meet, the criteria of
publicly-offered securities as described above. There are no restrictions
imposed on the transfer of the Investor Certificates offered hereby, and the
Investor Certificates offered hereby will be sold as part of an offering
pursuant to an effective registration statement under the Securities Act and
then will be timely registered under the Exchange Act.
 
  If the Banks intend that Benefit Plans consider their ability to invest in
any Investor Certificates offered hereby in reliance upon the exemption for
publicly offered securities, then, based on information provided by any
underwriter, agent or dealer involved in the distribution of the Investor
Certificates, the Banks will notify the Trustee if the Class A Certificates of
any Series will be expected to be held by at least 100 separately named
persons at the conclusion of the offering and if the Class B Certificates of
any Series (if the Class B Certificates are being offered by this Prospectus
and an accompanying Prospectus Supplement) will be expected to be held by at
least 100 separately named persons at the conclusion of the offering. The
Banks will not, however, determine whether there will, in fact, be at least
100 separately named persons, whether the named persons will be independent of
the issuer or of one another, or whether the 100-investor requirement of the
exception for publicly offered securities is satisfied as to either the Class
A Certificates or the Class B Certificates of such Series. Prospective
purchasers may obtain a copy of the notification described in the second
preceding sentence from the Trustee at its Corporate Trust Office.
 
INVESTMENTS BY BENEFIT PLANS
 
  Unless otherwise provided in the applicable Prospectus Supplement, Benefit
Plans will be permitted to purchase Investor Certificates if (1) in the case
of Class A Certificates of a particular Series, either the Banks have
indicated in the Prospectus Supplement for such Series that they believe that
the conditions of the Exemption relating to the terms and conditions of the
Class A Certificates will be satisfied at the time of issuance, or the Banks
notify the Trustee that the Class A Certificates are expected to be held by at
least 100 separately named persons at the conclusion of the offering, and (2)
in the case of the Class B Certificates of a particular Series, the Banks
notify the Trustee that the Class B Certificates are expected to be held by at
least 100 separately named persons at the conclusion of the offering. In all
other cases, Investor Certificates may not be acquired by any Benefit Plan. In
such cases, the Series Supplement and each Investor Certificate will provide
that each holder of such Investor Certificate shall be deemed to have
represented and warranted that it is not a Benefit Plan and is not purchasing
such Investor Certificate on behalf of a Benefit Plan or with assets that are
treated as assets of a Benefit Plan.
 
  In light of the foregoing, fiduciaries of Benefit Plans considering the
purchase of Investor Certificates should consult their own counsel as to
whether the acquisition of such Investor Certificates would be a prohibited
transaction, whether Trust Assets which are represented by such Investor
Certificates would be considered plan assets, the consequences that would
apply if the Trust Assets were considered plan assets, and the applicability
of exemptive relief from the prohibited transaction rules. Additional
considerations may also apply to a Benefit Plan if the fiduciary of the
Benefit Plan making the investment decision concerning Investor
 
                                      75
<PAGE>
 
Certificates also is one of the Banks, the Trustee, a party that engages in
transactions with the Trust, or a party related to any of the foregoing.
 
  In addition, based on the reasoning of the United States Supreme Court's
decision in John Hancock Life Ins. Co. v. Harris Trust and Sav. Bank, 510 U.S.
86 (1993), under certain circumstances assets in the general account of an
insurance company may be deemed to be plan assets for certain purposes, and
under such reasoning a purchase of Investor Certificates with assets of an
insurance company's general account might be subject to the prohibited
transaction rules described above. Insurance companies investing assets of
their general accounts should also consider the potential effects of the
enactment of section 401(c) of ERISA, Prohibited Transaction Exemption 95-60,
and Proposed Labor Department Regulation 29 CFR (S) 2550.401c-1.
 
                             PLAN OF DISTRIBUTION
 
  The Banks may sell Investor Certificates in any of three ways: (i) through
underwriters or dealers; (ii) directly to one or more purchasers; or (iii)
through agents. The related Prospectus Supplement will set forth the terms of
the offering of any Investor Certificates, including, without limitation, the
names of any underwriters, the purchase price of such Investor Certificates
and the proceeds to the Banks from such sale, any underwriting discounts and
other items constituting underwriters' compensation, any initial public
offering price and any discounts or concessions allowed or reallowed or paid
to dealers.
 
  If underwriters are used in a sale of any Investor Certificates, such
Investor Certificates will be acquired by the underwriters for their own
account and may be resold from time to time in one or more transactions,
including negotiated transactions, at a fixed public offering price or at
varying prices to be determined at the time of sale or at the time of
commitment therefor. Such Investor Certificates may be offered to the public
either through underwriting syndicates represented by managing underwriters or
by underwriters without a syndicate. Unless otherwise set forth in the related
Prospectus Supplement, the obligations of the underwriters to purchase such
Investor Certificates will be subject to certain conditions precedent, and the
underwriters will be obligated to purchase all of such Investor Certificates
if any of such Investor Certificates are purchased. Any initial public
offering price and any discounts or concessions allowed or reallowed or paid
to dealers may be changed from time to time.
 
  Investor Certificates may also be offered and sold, if so indicated in the
related Prospectus Supplement, in connection with a remarketing upon their
purchase, in accordance with a redemption or repayment pursuant to their
terms, by one or more firms ("remarketing firms") acting as principals for
their own accounts or as agents for the Banks. Any remarketing firm will be
identified and the terms of its agreement, if any, with the Banks and its
compensation will be described in the related Prospectus Supplement.
Remarketing firms may be deemed to be underwriters in connection with the
Investor Certificates remarketed thereby.
 
  Investor Certificates may also be sold directly by the Banks or through
agents designated by the Banks from time to time. Any agent involved in the
offer or sale of Investor Certificates will be named, and any commissions
payable by the Banks to such agent will be set forth, in the related
Prospectus Supplement. Unless otherwise indicated in the related Prospectus
Supplement, any such agent will act on a best efforts basis for the period of
its appointment.
 
  Any underwriters, dealers or agents participating in the distribution of
Investor Certificates may be deemed to be underwriters and any discounts or
commissions received by them on the sale or resale of Investor Certificates
may be deemed to be underwriting discounts and commissions under the
Securities Act. Agents and underwriters may be entitled under agreements
entered into with the Banks to indemnification by the Banks against certain
civil liabilities, including liabilities under the Securities Act, or to
contribution with respect to payments that the agents or underwriters may be
required to make in respect thereof. Agents and underwriters may be customers
of, engage in transactions with, or perform services for, the Banks or their
affiliates in the ordinary course of business.
 
                                      76
<PAGE>
 
  Affiliates of the Banks may act as agents or underwriters in connection with
the sale of the Investor Certificates. Any affiliate of the Banks so acting
will be named, and its affiliation with the Banks described, in the related
Prospectus Supplement. Also, affiliates of the Banks may act as principals or
agents in connection with market-making transactions relating to the Investor
Certificates. This Prospectus and the related Prospectus Supplement may be
used by such affiliates in connection with offers and sales related to market-
making transactions in the Investor Certificates. Such sales will be made at
prices related to prevailing market prices at the time of sale.
 
                                 LEGAL MATTERS
 
  Certain legal matters relating to the Investor Certificates will be passed
upon for the Banks and the Trust by Stephen E. Dietz, as an Associate General
Counsel of Citibank, N.A., and for any agents or underwriters by Cravath,
Swaine & Moore, New York, New York. Mr. Dietz owns or has the right to acquire
a number of shares of common stock of Citicorp equal to less than .01% of the
outstanding common stock of Citicorp. Certain federal income tax and ERISA
matters will be passed upon for the Banks and the Trust by Cravath, Swaine &
Moore, New York, New York and certain South Dakota tax matters will be passed
upon for the Banks and the Trust by Davenport, Evans, Hurwitz & Smith, L.L.P.,
Sioux Falls, South Dakota.
 
                                      77
<PAGE>
 
                                    GLOSSARY
<TABLE>
<CAPTION>
TERM                                PAGE
- ----                                ----
<S>                                 <C>
Accounts..........................    4
Accumulation Period...............    9
Additional Accounts...............   23
Adjustment Payment................   46
Adverse Effect....................   16
Available Cash Collateral Amount..   49
Available Enhancement Amount......   47
Available Investor Principal
 Collections......................   43
Available L/C Amount..............   50
Available Shared Enhancement
 Amount...........................   47
Banks.............................    1
Banks' Certificate................    6
Banks' Interest...................    5
Benefit Plans.....................   75
Cash Collateral Account...........   47
Cash Collateral Depositor.........   49
Cede..............................    2
Cedel.............................   57
Cedel Participants................   57
Certificateholders' Interest......    5
Citibank..........................   56
Citibank (Nevada).................    3
Citibank (South Dakota)...........    3
Class A Certificate Rate..........   29
Class A Certificateholders........    2
Class A Certificates..............    1
Class A Controlled Amortization
 Amount...........................   43
Class A Controlled Distribution
 Amount...........................   43
Class A Covered Amount............   44
Class A Deficit Controlled
 Amortization Amount..............   44
Class A Excess Investment Pro-
 ceeds............................   44
Class A Funding Account Payment...   39
Class A Funding Account Receipt...   39
Class A Funding Account
 Shortfall........................   45
Class A Funding Accounts..........   45
Class A Interest..................    5
Class A Interest Funding Account..   29
Class A Invested Amount...........   33
Class A Investment Fee............   40
Class A Investment Proceeds.......   44
Class A Investor Charge-Off.......   46
Class A Investor Default Amount...   40
Class A Monthly Interest..........   40
Class A Monthly Principal.........   44
Class A Monthly Servicing Fee.....   53
Class A Net Cap Receipt...........   40
</TABLE>
<TABLE>
<CAPTION>
TERM                                PAGE
- ----                                ----
<S>                                 <C>
Class A Net Swap Payment..........   40
Class A Net Swap Receipt..........   40
Class A Principal Funding Ac-
 count............................    9
Class A Principal Funding Account
 Balance..........................   44
Class B Certificate Rate..........   29
Class B Certificateholders........    2
Class B Certificates..............    1
Class B Interest..................    5
Class B Interest Funding Account..   29
Class B Invested Amount...........   33
Class B Investor Charge-Off.......   47
Class B Investor Default Amount...   40
Class B Monthly Interest..........   40
Class B Monthly Principal.........   44
Class B Monthly Servicing Fee.....   53
Class B Net Swap Payment..........   40
Class B Principal Commencement
 Date.............................   44
Code..............................   70
Collection Account................   26
Commission........................    2
Controlled Distribution Amount....    9
Cooperative.......................   57
Credit Enhancement................   47
Credit Enhancement Agreement......   41
Defaulted Receivables.............   45
Definitive Certificates...........   58
Depositaries......................   56
Depository........................   29
Determination Date................   11
Disclosure Document...............    6
Distribution Date.................   11
DOL...............................   75
DTC...............................    2
Due Period........................   11
Early Amortization Event..........   50
Early Amortization Period.........   10
Economic Early Amortization
 Event............................   48
Eligible Account..................   61
Eligible Deposit Account..........   26
Eligible Institution..............   27
Eligible Investments..............   27
Eligible Receivable...............   62
Enhancement Invested Amount.......   33
ERISA.............................   74
Euroclear.........................   57
Euroclear Operator................   57
Euroclear Participants............   57
Euroclear System..................   57
</TABLE>
 
                                       78
<PAGE>
 
<TABLE>
<S>                                                                          <C>
Excess Finance Charge Collections...........................................  40
Excess Principal Collections................................................  38
Exchange Act................................................................   2
Expected Final Payment Date.................................................  13
FDIA........................................................................  68
FDIC........................................................................   6
Final Regulation............................................................  75
Finance Charge Receivables..................................................   4
FIRREA......................................................................  68
Floating Allocation Percentage..............................................  33
Gross Amount................................................................  34
Group.......................................................................   7
Group One...................................................................   7
Group One Investor Additional Amounts.......................................  34
Group One Investor Default Amount...........................................  35
Group One Investor Finance Charges..........................................  35
Group One Investor Monthly Fees.............................................  35
Group One Investor Monthly Interest.........................................  35
Holders.....................................................................  59
Income Tax Withholding......................................................  12
Indirect Participants.......................................................  56
Ineligible Receivables......................................................  60
Initial Accounts............................................................   4
Initial Cash Collateral Amount..............................................  49
Initial Class B Collateral Amount...........................................  49
Initial Class B Enhancement Amount..........................................  47
Initial Class B L/C Amount..................................................  50
Initial Shared Collateral Amount............................................  49
Initial Shared Enhancement Amount...........................................  47
Initial Shared L/C Amount...................................................  50
Insolvency Event............................................................  18
Interchange.................................................................   5
Interest....................................................................   8
Interest Calculation Date...................................................  40
Interest Funding Account....................................................   8
Interest Payment Date.......................................................  40
Interest Period.............................................................  40
Invested Amount.............................................................  33
Investment Company Act......................................................  23
Investor Certificateholders.................................................   2
Investor Certificates.......................................................   1
Investor Finance Charges....................................................  32
Investor Principal Collections..............................................  32
IRA.........................................................................  75
IRS.........................................................................  70
Issuer......................................................................   3
L/C.........................................................................  47
L/C Funding Account.........................................................  50
L/C Issuer..................................................................  50
L/C Issuer Downgrade........................................................  50
Lump Sum Addition...........................................................  22
MasterCard International....................................................   5
</TABLE>
<TABLE>
<S>                                                                          <C>
Monthly Credit Enhancement Fee..............................................  41
Monthly Report..............................................................  54
Moody's.....................................................................  27
Morgan......................................................................  56
Net Servicing Fee Rate......................................................  53
New Accounts................................................................  22
New Issuance................................................................  24
OID.........................................................................  12
OID regulations.............................................................  70
Participants................................................................  56
Participations..............................................................  22
Paying Agent................................................................  45
Payment Date................................................................  40
Pooling Agreement...........................................................  28
Portfolio...................................................................  17
Portfolio Yield.............................................................  20
Principal...................................................................   8
Principal Allocation Percentage.............................................  34
Principal Receivables.......................................................   4
Principal Shortfalls........................................................  38
Principal Terms.............................................................  25
Prospectus Supplement.......................................................   1
Rating Agency...............................................................  15
Ratings Effect..............................................................  16
Reallocated Investor Finance Charges........................................  34
Receivables.................................................................   1
Record Date.................................................................  53
Removal Date................................................................  24
Removed Accounts............................................................   4
Required Amount.............................................................  42
Required Minimum Principal Balance..........................................  13
Required Surplus Finance Charge Amount......................................  13
Revolving Period............................................................   8
Securities Act..............................................................   2
Seller Servicing Fee........................................................  53
Series......................................................................   1
Series Adjusted Invested Amount.............................................  28
Series Allocable Defaulted Receivables......................................  28
Series Allocable Finance Charge Collections.................................  28
Series Allocable Miscellaneous Payments.....................................  28
Series Allocable Principal Collections......................................  28
Series Allocation Percentage................................................  28
Series Cut-Off Date.........................................................   9
Series Enhancement..........................................................   3
Series Issuance Date........................................................  25
Series Servicing Fee........................................................  53
Series Supplement...........................................................  28
Series Termination Date.....................................................  25
Service Transfer............................................................  65
Servicer....................................................................  11
Servicer Default............................................................  65
Servicer Interchange........................................................  53
</TABLE>
 
                                       79
<PAGE>
 
<TABLE>
<S>                                                                          <C>
Servicer Interchange Rate...................................................  53
South Dakota Tax Counsel....................................................  74
Special Payment Date........................................................  40
Standard & Poor's...........................................................  27
Stated L/C Amount...........................................................  49
Subordinated Principal Collections..........................................  42
Supplement..................................................................   6
Supplemental Certificate....................................................  59
Surplus Finance Charge Collections..........................................  14
Tax Counsel.................................................................  71
Tax Status..................................................................  12
Termination Notice..........................................................  65
</TABLE>
<TABLE>
<S>                                                                          <C>
Terms and Conditions........................................................  58
Transfer Deposit Amount.....................................................  61
Trust.......................................................................   1
Trust Adjusted Invested Amount..............................................  28
Trust Assets................................................................   3
Trust Cut-Off Date..........................................................   4
Trust Servicing Fee.........................................................  52
Trust Termination Date......................................................  59
Trustee.....................................................................   3
UCC.........................................................................  17
Unallocated Principal Collections...........................................  38
VISA........................................................................   5
</TABLE>
 
                                       80
<PAGE>
 
                                    ANNEX I
 
         GLOBAL CLEARANCE, SETTLEMENT AND TAX DOCUMENTATION PROCEDURES
 
  Except in certain limited circumstances, the globally offered Class A
Certificates and Class B Certificates (if the Class B Certificates are being
offered by this Prospectus and an accompanying Prospectus Supplement) (the
"Global Securities") will be available only in book-entry form. Investors in
the Global Securities may hold such Global Securities through any of The
Depository Trust Company ("DTC"), Cedel or Euroclear. The Global Securities
will be tradeable as home market instruments in both the European and U.S.
domestic markets. Initial settlement and all secondary trades will settle in
same-day funds.
 
  Secondary market trading between investors holding Global Securities through
Cedel and Euroclear will be conducted in the ordinary way in accordance with
their normal rules and operating procedures and in accordance with
conventional eurobond practice (i.e., seven calendar day settlement).
 
  Secondary market trading between investors holding Global Securities through
DTC will be conducted according to the rules and procedures applicable to U.S.
corporate debt obligations.
 
  Secondary cross-market trading between Cedel or Euroclear and DTC
participants holding Global Securities will be effected on a delivery-against-
payment basis through Citibank, N.A. ("Citibank") and Morgan Guaranty Trust
Company of New York ("Morgan") as the respective depositaries of Cedel and
Euroclear and as participants in DTC.
 
  Non-U.S. holders of Global Securities will be exempt from U.S. withholding
taxes, provided that such holders meet certain requirements and deliver
appropriate U.S. tax documents to the securities clearing organizations or
their participants.
 
INITIAL SETTLEMENT
 
  All Global Securities will be held in book-entry form by DTC in the name of
Cede & Co. as nominee of DTC. Investors' interests in the Global Securities
will be represented through financial institutions acting on their behalf as
direct and indirect participants in DTC. As a result, Cedel and Euroclear will
hold positions on behalf of their participants through their respective
depositaries, Citibank and Morgan, which in turn will hold such positions in
accounts as participants of DTC.
 
  Investors electing to hold their Global Securities through DTC will follow
the settlement practices applicable to securities previously issued by
Standard Credit Card Trusts established by the Banks. Investor securities
custody accounts will be credited with their holdings against payment in same-
day funds on the settlement date.
 
  Investors electing to hold their Global Securities through Cedel or
Euroclear accounts will follow the settlement procedures applicable to
conventional eurobonds, except that there will be no temporary global security
and no "lock-up" or restricted period. Global Securities will be credited to
the securities custody accounts on the settlement date against payment in
same-day funds.
 
SECONDARY MARKET TRADING
 
  Since the purchaser determines the place of delivery, it is important to
establish at the time of the trade where both the purchaser's and seller's
accounts are located to ensure that settlement can be made on the desired
value date.
 
  Trading between DTC participants. Secondary market trading between DTC
participants will be settled using the procedures applicable to securities
previously issued by Standard Credit Card Trusts established by the Banks in
same-day funds.
 
 
                                      I-1
<PAGE>
 
  Trading between Cedel and/or Euroclear participants. Secondary market
trading between Cedel participants and/or Euroclear participants will be
settled using the procedures applicable to conventional eurobonds in same-day
funds.
 
  Trading between DTC seller and Cedel or Euroclear purchaser. When Global
Securities are to be transferred from the account of a DTC participant to the
account of a Cedel participant or a Euroclear participant, the purchaser will
send instructions to Cedel or Euroclear through a participant at least one
business day prior to settlement. Cedel or Euroclear will instruct Citibank or
Morgan, respectively, as the case may be, to receive the Global Securities
against payment. Payment will include interest accrued on the Global
Securities from and including the last coupon payment date to and excluding
the settlement date. For transactions settling on the 31st day of the month,
payment will include interest accrued to and excluding the first day of the
following month. Payment will then be made by Citibank or Morgan to the DTC
participant's account against delivery of the Global Securities. After
settlement has been completed, the Global Securities will be credited to the
respective clearing system and by the clearing system, in accordance with its
usual procedures, to the Cedel participant's or Euroclear participant's
account. The Global Securities credit will appear the next day (European time)
and the cash debit will be back-valued to, and the interest on the Global
Securities will accrue from, the value date (which would be the preceding day
when settlement occurred in New York). If settlement is not completed on the
intended value date (i.e., the trade fails), the Cedel or Euroclear cash debit
will be valued instead as of the actual settlement date.
 
  Cedel participants and Euroclear participants will need to make available to
the respective clearing systems the funds necessary to process same-day funds
settlement. The most direct means of doing so is to preposition funds for
settlement, either from cash on hand or existing lines of credit, as they
would for any settlement occurring within Cedel or Euroclear. Under this
approach, they may take on credit exposure to Cedel or Euroclear until the
Global Securities are credited to their accounts one day later.
 
  As an alternative, if Cedel or Euroclear has extended a line of credit to
them, participants can elect not to preposition funds and allow that credit
line to be drawn upon to finance settlement. Under this procedure, Cedel
participants or Euroclear participants purchasing Global Securities would
incur overdraft charges for one day, assuming they cleared the overdraft when
the Global Securities were credited to their accounts. However, interest on
the Global Securities would accrue from the value date. Therefore, in many
cases the investment income on the Global Securities earned during that one-
day period may substantially reduce or offset the amount of such overdraft
charges, although this result will depend on each participant's particular
cost of funds.
 
  Since the settlement is taking place during New York business hours, DTC
participants can employ their usual procedures for sending Global Securities
to Citibank or Morgan for the benefit of Cedel participants or Euroclear
participants. The sale proceeds will be available to the DTC seller on the
settlement date. Thus, to the DTC participant a cross-market transaction will
settle no differently than a trade between two DTC participants.
 
  Trading between Cedel or Euroclear seller and DTC purchaser. Due to time
zone differences in their favor, Cedel and Euroclear participants may employ
their customary procedures for transactions in which Global Securities are to
be transferred by the respective clearing system, through Citibank or Morgan,
to a DTC participant. The seller will send instructions to Cedel or Euroclear
through a participant at least one business day prior to settlement. In these
cases, Cedel or Euroclear will instruct Citibank or Morgan, as appropriate, to
deliver the bonds to the DTC participant's account against payment. Payment
will include interest accrued on the Global Securities from and including the
last coupon payment date to and excluding the settlement date. For
transactions settling on the 31st day of the month, payment will include
interest accrued to and excluding the first day of the following month. The
payment will then be reflected in the account of the Cedel participant or
Euroclear participant the following day, and receipt of the cash proceeds in
the Cedel or Euroclear participant's account would be back-valued to the value
date (which would be the preceding day, when settlement occurred in New York).
Should the Cedel or Euroclear participant have a line of credit with its
respective clearing system and elect to be in debit in anticipation of receipt
of the sale proceeds in its account, the back-valuation will extinguish
 
                                      I-2
<PAGE>
 
any overdraft charges incurred over that one-day period. If settlement is not
completed on the intended value date (i.e., the trade fails), receipt of the
cash proceeds in the Cedel or Euroclear participant's account would instead be
valued as of the actual settlement date.
 
  Finally, day traders that use Cedel or Euroclear and that purchase Global
Securities from DTC participants for delivery to Cedel participants or
Euroclear participants should note that these trades would automatically fail
on the sale side unless affirmative action were taken. At least three
techniques should be readily available to eliminate this potential problem:
 
    (1) borrowing through Cedel or Euroclear for one day (until the purchase
  side of the day trade is reflected in their Cedel or Euroclear accounts) in
  accordance with the clearing system's customary procedures;
 
    (2) borrowing the Global Securities in the U.S. from a DTC participant no
  later than one day prior to settlement, which would give the Global
  Securities sufficient time to be reflected in their Cedel or Euroclear
  account in order to settle the sale side of the trade; or
 
    (3) staggering the value dates for the buy and sell sides of the trade so
  that the value date for the purchase from the DTC participant is at least
  one day prior to the value date for the sale to the Cedel participant or
  Euroclear participant.
 
CERTAIN U.S. FEDERAL INCOME TAX DOCUMENTATION REQUIREMENTS
 
  A holder of Global Securities holding securities through Cedel or Euroclear
(or through DTC if the holder has an address outside the U.S.) will be subject
to the 30% U.S. withholding tax that generally applies to payments of interest
(including original issue discount) on registered debt issued by U.S. persons,
unless such holder takes one of the following steps to obtain an exemption or
reduced tax rate:
 
  Exemption for non-U.S. persons (Form W-8). Non-U.S. persons that are
beneficial owners can obtain a complete exemption from the withholding tax by
filing a signed Form W-8 (Certificate of Foreign Status).
 
  Exemption for non-U.S. persons with effectively connected income (Form
4224). A non-U.S. person, including a non-U.S. corporation or bank with a U.S.
branch, for which the interest income is effectively connected with its
conduct of a trade or business in the United States, can obtain an exemption
from the withholding tax by filing Form 4224 (Exemption from Withholding of
Tax on Income Effectively Connected with the Conduct of a Trade or Business in
the United States).
 
  Exemption or reduced rate for non-U.S. persons resident in treaty countries
(Form 1001). Non-U.S. persons that are beneficial owners residing in a country
that has a tax treaty with the United States can obtain an exemption or
reduced tax rate (depending on the treaty terms) by filing Form 1001
(Ownership, Exemption or Reduced Rate Certificate). If the treaty provides
only for a reduced rate, withholding tax will be imposed at that rate unless
the filer alternatively files Form W-8. Form 1001 may be filed by the
beneficial owner or his agent.
 
  Exemption for U.S. persons (Form W-9). U.S. persons can obtain a complete
exemption from the withholding tax by filing Form W-9 (Request for Taxpayer
Identification Number and Certification).
 
  U.S. Federal Income Tax Reporting Procedure. The Global Security holder, or
in the case of a Form 1001 or a Form 4224 filer, his agent, files by
submitting the appropriate form to the person through whom he holds (the
clearing agency, in the case of persons holding directly on the books of the
clearing agency). Form W-8 and Form 1001 are effective for three calendar
years and Form 4224 is effective for one calendar year.
 
  This summary does not deal with all aspects of federal income tax
withholding that may be relevant to foreign holders of these Global
Securities. Investors are advised to consult their own tax advisors for
specific tax advice concerning their holding and disposing of these Global
Securities.
 
                                      I-3
<PAGE>
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
 
 NO DEALER, SALESMAN OR ANY OTHER PERSON HAS BEEN AUTHORIZED TO GIVE ANY IN-
FORMATION OR TO MAKE ANY REPRESENTATIONS NOT CONTAINED OR INCORPORATED BY REF-
ERENCE IN THIS PROSPECTUS SUPPLEMENT OR THE ACCOMPANYING PROSPECTUS IN CONNEC-
TION WITH THE OFFER MADE BY THIS PROSPECTUS SUPPLEMENT AND THE ACCOMPANYING
PROSPECTUS AND, IF GIVEN OR MADE, SUCH INFORMATION OR REPRESENTATIONS MUST NOT
BE RELIED UPON. NEITHER THE DELIVERY OF THIS PROSPECTUS SUPPLEMENT NOR THE AC-
COMPANYING PROSPECTUS NOR ANY SALE MADE HEREUNDER AND THEREUNDER SHALL UNDER
ANY CIRCUMSTANCES CREATE ANY IMPLICATION THAT THERE HAS BEEN NO CHANGE IN THE
AFFAIRS OF CITIBANK (SOUTH DAKOTA), N.A. OR CITIBANK (NEVADA), NATIONAL ASSO-
CIATION OR IN THE RECEIVABLES OR THE ACCOUNTS SINCE THE DATE HEREOF. THIS PRO-
SPECTUS SUPPLEMENT AND THE ACCOMPANYING PROSPECTUS DO NOT CONSTITUTE AN OFFER
OR SOLICITATION BY ANYONE IN ANY STATE IN WHICH SUCH OFFER OR SOLICITATION IS
NOT AUTHORIZED OR IN WHICH THE PERSON MAKING SUCH OFFER OR SOLICITATION IS NOT
QUALIFIED TO DO SO OR TO ANYONE TO WHOM IT IS UNLAWFUL TO MAKE SUCH OFFER OR
SOLICITATION.
 
                               -----------------
 
                               TABLE OF CONTENTS
 
                             PROSPECTUS SUPPLEMENT
<TABLE>
<CAPTION>
                                                                           Page
                                                                           ----
<S>                                                                        <C>
Summary of Series Terms...................................................  S-3
The Credit Card Business of Citibank
 (South Dakota)...........................................................  S-9
The Accounts.............................................................. S-12
The Banks................................................................. S-19
Supplemental Series Provisions............................................ S-19
Underwriting.............................................................. S-22
Legal Matters............................................................. S-23
Glossary Supplement....................................................... S-24
Annex I: Prior Issuances of Investor Certificates.........................  I-1
 
                                  PROSPECTUS
Available Information.....................................................    2
Reports to Certificateholders.............................................    2
Incorporation of Certain Documents by Reference...........................    2
Prospectus Summary........................................................    3
Special Considerations....................................................   13
The Banks.................................................................   20
Use of Proceeds...........................................................   21
The Trust.................................................................   21
Master Trust Provisions...................................................   21
Series Provisions.........................................................   28
The Pooling Agreement Generally...........................................   54
Certain Legal Aspects of the Receivables..................................   66
Tax Matters...............................................................   68
ERISA Considerations......................................................   73
Plan of Distribution......................................................   76
Legal Matters.............................................................   77
Glossary..................................................................   78
Annex I: Global Clearance, Settlement and Tax Documentation Procedures....  I-1
</TABLE>
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
 
                      CITIBANK CREDIT CARD MASTER TRUST I
 
                                $1,250,000,000
  FLOATING RATE CLASS A CREDIT CARD PARTICIPATION CERTIFICATES, SERIES 1998-7
 
                                  $80,000,000
         FLOATING RATE CLASS B CREDIT CARD PARTICIPATION CERTIFICATES,
                                 SERIES 1998-7
 
                         CITIBANK (SOUTH DAKOTA), N.A.
                              SELLER AND SERVICER
 
                    CITIBANK (NEVADA), NATIONAL ASSOCIATION
                                    SELLER
 
                               -----------------
 
                             PROSPECTUS SUPPLEMENT
                               Dated May 7, 1998
 
                               -----------------
 
                   UNDERWRITERS OF THE CLASS A CERTIFICATES
 
                                LEHMAN BROTHERS
                                   CITIBANK
                          CREDIT SUISSE FIRST BOSTON
 
                    UNDERWRITER OF THE CLASS B CERTIFICATES
 
                                LEHMAN BROTHERS
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------


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