SCHEDULE 14A
                                 (Rule 14a-101)

                     INFORMATION REQUIRED IN PROXY STATEMENT

                            SCHEDULE 14A INFORMATION

           Proxy Statement Pursuant to Section 14(a) of the Securities
                     Exchange Act of 1934 (Amendment No. 1)

          Filed by the Registrant [X]
          Filed by a Party other than the Registrant [  ]


          Check the appropriate box:

          [X]  Preliminary Proxy Statement  [  ] Confidential, for Use of the
                                           Commission Only (as permitted by Rule
                                           14a-6(e)(2))

          [   ]  Definitive Proxy Statement
          [   ]  Definitive Additional Materials
          [   ]  Soliciting Material Pursuant to Rule 14a-11(c) or
               Rule 14a-12

                        STANDARD CREDIT CARD TRUST 1990-6
        .................................................................
                (Name of Registrant as Specified In Its Charter)

          .................................................................
       (Name of Person(s) Filing Proxy Statement, if other than the Registrant)

          Payment of Filing Fee (Check the appropriate box):

          [    ]  $125  per  Exchange  Act  Rules  0-11(c)(1)(ii),  14a-6(i)(1),
               14a-6(i)(2) or Item 22(a)(2) of Schedule 14A.
          [    ] $500 per each party to the controversy pursuant to Exchange Act
               Rule 14a-6(i)(3).
          [    ] Fee computed on table below per Exchange Act Rules  14a-6(i)(4)
               and 0-11.

               1)  Title of each class of securities to which transaction
          applies:

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               2)  Aggregate number of securities to which transaction
          applies:

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               3) Per  unit  price  or other  underlying  value  of  transaction
          computed  pursuant to Exchange  Act Rule 0-11 (Set forth the amount on
          which the filing fee is calculated and state how it was determined):

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               4)  Proposed maximum aggregate value of transaction:

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               5)  Total fee paid:

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          [X]  Fee paid previously with preliminary materials.
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               Exchange  Act Rule  0-11(a)(2)  and identify the filing for which
               the  offsetting  fee was paid  previously.  Identify the previous
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               4)   Date Filed:



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                          CITIBANK (SOUTH DAKOTA), N.A.
                     CITIBANK (NEVADA), NATIONAL ASSOCIATION

                             SOLICITATION STATEMENT

         Statement  Soliciting  Consents  of  Investor  Certificateholders  with
         respect to a proposed Amendment of the Pooling and Servicing  Agreement
         governing the Credit Card Participation Certificates issued by:

                        STANDARD CREDIT CARD TRUST 1990-6

                  Class A Certificates (Cusip No. 853333 AK8*)
                  Class B Certificates (Cusip No. 853333 AL61)


         This  solicitation  statement is furnished by Citibank  (South Dakota),
N.A., a national banking association  ("Citibank (South Dakota)"),  and Citibank
(Nevada),  National  Association,  a  national  banking  association  ("Citibank
(Nevada)"  and  together  with  Citibank  (South  Dakota),   the  "Banks"),   as
originators of Standard  Credit Card Trust 1990-6 (the  "Trust"),  to holders of
the Credit Card Participation  Certificates issued by such Trust  (collectively,
the "Investor  Certificates") which represent undivided interests in such Trust.
This  solicitation  statement  is  being  sent in  connection  with  the  Banks'
solicitation (the "Solicitation") of consents from the registered holders of the
Investor  Certificates  (the "Investor  Certificateholders")  as at the close of
business on September __, 1996 (the "Record Date") to the execution and delivery
of a proposed Amendment (the "Amendment") to the Pooling and Servicing Agreement
(the "Agreement") among Citibank (South Dakota) , as seller and servicer (in its
capacity as servicer,  the "Servicer"),  Citibank  (Nevada),  as seller, and The
Chase  Manhattan  Bank  (formerly  known as  Chemical  Bank),  as  trustee  (the
"Trustee"). The date on which this solicitation statement is first being sent to
Investor Certificateholders is October __, 1996.    

         Approval of the  Amendment  requires  the consent  (the  "Consent")  of
Investor  Certificateholders  evidencing  not less than 66-2/3% of the aggregate
unpaid principal amount of the Investor Certificates issued and outstanding with
respect to the Trust (the "Certificateholders' Interest") and the consent of The
Sumitomo Bank, Limited, New York Branch, the issuer of the letter of credit with
respect to the Trust (the "Credit Enhancer"). The Amendment will be executed and
delivered  if  Consents  are  obtained  from the  required  number  of  Investor
Certificateholders  on or before  the  Solicitation  Expiration  Date and if the
Credit Enhancer  consents to such Amendment.  There can be no assurance that the
Credit Enhancer will consent to the Amendment. Notwithstanding that Consents are
obtained from the required number of Investor  Certificateholders,  in the event
that the Credit Enhancer does not consent to the Amendment, the Amendment cannot
be executed and delivered. 

- --------
     * This CUSIP number has been assigned by Standard & Poor's Rating  Services
and is  included  solely for the  convenience  of the  holders  of the  Investor
Certificates.  Neither the Banks nor the Trustee  shall be  responsible  for the
selection or use of this CUSIP number, nor is any representation  made as to its
correctness on the Investor Certificates or as indicated herein or in any of the
accompanying documents.


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Furthermore,  the  Amendment  will  become  effective  only upon  receipt by the
Trustee of letters  from  Standard & Poor's  Ratings  Group,  Moody's  Investors
Service,  Inc.  and Duff & Phelps  Credit  Rating Co. (the  "Rating  Agencies"),
confirming  that  adoption of such  Amendment  will not result in a reduction or
withdrawal of their respective ratings of the Investor Certificates.    

         The term  "Solicitation  Expiration Date" means the earlier of (a) 5:00
p.m.  New York City time on  November  __ , 1996 or (b) 5:00 p.m.  New York City
time on the date on which  Consents  are obtained  from the  required  number of
Investor  Certificateholders  or, if extended by the Banks, such subsequent time
and date  specified  by the  Banks.  The Banks  reserve  the right to extend the
period   during   which   Consents   will  be   received   from   the   Investor
Certificateholders  (the  "Solicitation  Period") at any time by making a public
announcement  of such  extension not later than 10:00 a.m. New York City time on
the business day  following any  previously  announced  Solicitation  Expiration
Date.  The Banks may  extend  the  Solicitation  Period  any number of times for
periods of up to 30 days each.    

         Only a registered  holder of an Investor  Certificate (or such holder's
authorized legal  representative) on the Record Date may execute a Consent,  and
such  Consent will be binding on all  subsequent  transferees  of such  Investor
Certificate.  Any  beneficial  owner  of an  Investor  Certificate  who is not a
registered owner of such Investor Certificate must arrange with a person who, as
of the  Record  Date,  was the  registered  holder or such  registered  holder's
assignee  to  execute  and  deliver  a  Consent  on  its  behalf.  Any  Investor
Certificateholder  who gives its Consent to the  Amendment  on the  accompanying
form may not revoke such Consent. Any Investor  Certificateholder who opposes or
abstains on the  accompanying  form may revoke such opposition or abstention and
give its Consent to the Amendment (by  delivering to the Trustee such Consent on
the accompanying form) at any time prior to the Solicitation Expiration Date. If
a properly executed Consent is returned with no instructions  given with respect
to the Amendment, the Consent will be deemed to be in favor of the Amendment.

         Investor Certificateholders will have no rights of appraisal or similar
dissenters' rights in the event that the Amendment is adopted.    

Purpose and Consequences of the Amendment

General

         The proposed  Amendment  provides for: (1) a reduction in the amount of
the Servicing Fee (as defined below) to which the Servicer is entitled under the
Agreement; (2) a requirement that a fixed portion of the newly reduced Servicing
Fee must be paid from Interchange (as defined below); and (3) a reduction of the
Base Rate (as defined  below)  applicable  under the  Agreement  by 0.70%,  from
11.825% to 11.125%.  These  actions are intended to reduce the  likelihood of an
Early  Amortization Event (as defined below) being triggered by a decline in the
Portfolio  Yield  (as  defined  below)  at a time  when  the  cash  flows on the
receivables  held by the Trust are expected to be sufficient,  in the absence of
the occurrence of an Early  Amortization  Event, to support the ultimate payment
of  principal  of and full and  timely  payment  of  interest  on such  Investor
Certificates, to the  degree  consistent  with  the  ratings  of  such  Investor
Certificates.  An "Early  Amortization Event" refers to the occurrence of any of
several  events  which  have the  effect  described  in the next  sentence,  the
relevant  occurrence  being the reduction of the Portfolio  Yield (averaged over
any three  consecutive  Due  Periods)  to a rate below the Base  Rate.  Upon the
occurrence  of an  Early  Amortization  Event,  monthly  distributions  of  both
principal and interest would commence on the first  distribution  date following
the occurrence of such event (although distributions of principal

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on the Class B Certificates would not commence until the principal amount of the
Class A Certificates has been repaid in full).  "Portfolio  Yield" is defined in
the  Agreement  as the  annualized  percentage  equivalent  of a  fraction,  the
numerator of which is the amount of collections  of finance  charge  receivables
during the immediately  preceding Due Period  calculated on a cash basis,  after
subtracting therefrom the excess, if any, of the amount of principal receivables
which were charged off as  uncollectible  in such Due Period over the  aggregate
amount of recoveries on charged-off  principal  receivables for such Due Period,
and the denominator of which is the total amount of principal receivables in the
Trust as of the last day of the immediately  preceding Due Period.  "Due Period"
is  defined  in the  Agreement  as a monthly  period  beginning  at the close of
business on the  fourth-to-last  business day of a month and ending at the close
of business on the  fourth-to-last  business day of the following  month.  "Base
Rate" is defined in the  Agreement as a per annum rate which is equal to (x) the
higher of the Class A Certificate Rate and the Class B Certificate Rate plus (y)
2.2% . The Base Rate is currently equal to 11.825%.    

   Advantages of the Amendment

         The Amendment will reduce the likelihood of an Early Amortization Event
occurring,  thereby  decreasing the likelihood  that principal will be repaid to
Investor  Certificateholders  with respect to the Investor  Certificates earlier
than  their  respective  expected  final  payment  dates;  therefore,   Investor
Certificateholders  are less likely to need to invest "premature"  distributions
of  principal,  the rate of return on which may be more or less than that of the
Investor Certificates.  As Investor Certificateholders expect, in the absence of
an Early  Amortization  Event,  interest  will continue to accrue and be paid to
Investor  Certificateholders on the Investor Certificates at their current fixed
rates until maturity on their respective expected final payment dates.  Further,
the proposed  Amendment has been reviewed by the Rating  Agencies,  all of which
have agreed that  adoption of the  Amendment  will not  adversely  affect  their
respective   ratings  of  either  the  Class  A  Certificates  or  the  Class  B
Certificates.  Thus, Investor Certificateholders would continue to hold Investor
Certificates  with the same  ratings  as those  currently  assigned,  but with a
reduced likelihood of early distributions of principal.    

   Disadvantages of the Amendment

         Although the Class A  Certificates  and the Class B  Certificates  will
maintain  their  respective  ratings after the adoption of the Amendment and the
reduction in the Base Rate, in the event that the Portfolio  Yield  subsequently
declines,  an Early  Amortization  Event  will  occur  later  than it would have
occurred without the adoption of the Amendment and the levels of Portfolio Yield
at such time would be lower than if such Early  Amortization Event occurred as a
result  of a  decline  in  Portfolio  Yield  prior to the  effectiveness  of the
Amendment.    

         The disadvantage of adoption of the Amendment to the Banks is the lower
Servicing Fee that they would receive,  although the Banks expect such reduction
to be offset by an increase in the excess spread remaining in the Trust.  Unlike
the  Servicing  Fee,  however,  the  excess  spread to which the Banks  would be
entitled is not subject to credit  enhancement,  so the likelihood of receipt of
such excess spread would be less certain.    

Certain Provisions of the Agreement

         The Agreement  provides that an Early  Amortization Event will occur if
the Portfolio  Yield  (averaged over three  consecutive  monthly Due Periods) is
reduced to a rate below the Base Rate.  Monthly  distributions  of principal and
interest to Class A  Certificateholders  would  begin on the first  Distribution
Date following the Due 

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Period in which such Early  Amortization  Event occurred.
Class B  Certificateholders  would not receive  payments of principal  until the
principal amount of the Class A Certificates were repaid in full.    

         The occurrence of an Early Amortization Event under the Agreement would
result in the early  repayment of principal to the Investor  Certificateholders.
No principal is scheduled to be paid to Class A Investor  Certificateholders and
Class B Investor  Certificateholders until July 10, 1997 and September 10, 1997,
respectively.    

         Following the  occurrence  of an Early  Amortization  Event,  principal
payments would be made on the Class A  Certificates  on each  Distribution  Date
until the  principal  amount  thereof has been paid in full before any principal
payments would be made with respect to the Class B Certificates.  In the case of
such  payments,  there would be no  limitation  on the amount of principal  that
could be distributed on any single Distribution Date.    

         The  purpose  of   accelerating   payment  of   principal  to  Investor
Certificateholders upon the occurrence of an Early Amortization Event is to help
ensure  that  Investor   Certificateholders  receive  a  full  return  of  their
investment  before the conditions  giving rise to such event actually impair the
cash flows  generated  by the  receivables held by the Trust, to the extent that
available credit  enhancement  would actually be depleted prior to such Investor
Certificateholders receiving such full return of their investment.    

         Under the terms of the Agreement,  Citibank  (South  Dakota)  covenants
that it will not reduce the  Portfolio  Yield to less than the Base Rate  unless
such reduction is otherwise  required by law or is deemed  necessary by Citibank
(South  Dakota) to maintain  its credit card  business on a  competitive  basis,
based on a good faith assessment by Citibank (South Dakota) of the nature of the
competition  in the credit card  business.  The  purpose of this  covenant is to
protect Investor  Certificateholders from Citibank (South Dakota) taking actions
that would  decrease  the cash flow on such  receivables  to a rate that is less
than that required to enable the Trust to continue to make scheduled payments of
interest and cover losses  attributable  to  charged-off  principal  receivables
allocable  to  Investor  Certificateholders  or to a  rate  that  would  trigger
amortization of the Investor Certificates as described above.

         Under the terms of the  Agreement,  the  Servicer  is  responsible  for
servicing,  managing and making collections on the receivables.  The Servicer is
entitled to a fee for these services on each Distribution  Date, payable monthly
in  arrears  (the  "Servicing  Fee") in an amount  equal to  one-twelfth  of the
product of 2.15% and the amount of principal  receivables  as of the last day of
the  second  preceding  Due  Period.  Each  Class of  Investor  Certificates  is
obligated to  contribute  its pro rata share of the  Servicing Fee based on such
Class's Invested Amount.  Such Servicing Fee is paid from the collection account
(unless  such amount had been  netted by the  Servicer  against its  deposits of
collections in respect of finance charge receivables to the collection account).

         Citibank (South Dakota)  receives  certain fees from VISA U.S.A.,  Inc.
("VISA") and MasterCard  International  Incorporated  ("MasterCard")  as partial
compensation  for taking credit risk,  absorbing fraud losses and funding credit
card receivables for a limited period prior to initial billing  ("Interchange").
Interchange  allocable to the Trust is  calculated  based on the volume of goods
and services  charged on credit cards the accounts of which have been designated
to the Trust. The amount of Interchange  generated by a transaction  ranges from
1.00% to 1.85% of the transaction amount,  although VISA and MasterCard may each
from time to time  change the  amount of  Interchange  reimbursed  to banks that
issue their credit cards.  Currently,  all Interchange allocable to the Trust is
deposited  into  the  collection   account  as  collections  of  finance  charge


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receivables.

         Distributions  from the collection account in respect of finance charge
receivables  are made by the  Servicer  in payment of  interest  and  delinquent
amounts on the Investor  Certificates prior to payment of the Servicing Fee. If,
on any  Distribution  Date,  inadequate  funds are  available in the  collection
account  to make full  payment of the  Servicing  Fee after  distributions  with
greater  priority have been made, such Servicing Fee shall be considered to have
been fully paid  regardless of the amount  actually paid to the Servicer on such
Distribution Date.

   Portfolio Yield and Early Amortization Event Risk    

         As  discussed  above,  the  Portfolio  Yield is based on the  amount of
collections of finance charge receivables  received by the Trust less the amount
of principal  receivables  which have been charged-off as uncollectible  and not
reimbursed to the Trust. The level of finance charge  collections and losses due
to charged-off  receivables depends on payment patterns of cardholders which are
the result of a variety of  economic,  legal and social  factors.  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.  Economic  factors  include the rate of  inflation,
unemployment  levels and  relative  interest  rates.  As shown in Exhibit I, the
amount of  charged-off  principal  receivables,  consistent  with the industry's
overall  experience,  has  increased  in recent  months,  although the number of
delinquent  accounts has not  increased  during this  period,  due largely to an
increase  in the  incidence  of  voluntary  filings of  personal  bankruptcy  by
cardholders  who, prior to such filings,  were not delinquent in making payments
on their  accounts.  The  amount of  charged-off  receivables  may  continue  to
increase in the future if such  economic  conditions  worsen and may continue to
increase  for several  months even after such  conditions  begin to improve.  An
increase  in the level of  delinquencies  or  increased  convenience  use (where
cardholders  pay their  balances early and avoid charges) could also result in a
decrease in the Portfolio Yield.  Also, the credit card industry is increasingly
competitive,  with new credit card issuers  continually  seeking to expand in or
enter the market and additional  non-cash  payment methods,  including  pre-paid
cash cards and other  technology-based cash substitutes,  being introduced which
may also compete with credit cards. If cardholders  choose to utilize  competing
sources of credit and/or methods of payment,  fewer credit card  receivables may
be  generated  and  certain  cardholder  purchase  and payment  patterns  may be
affected.  Citibank  (South  Dakota)  reviews  market  conditions  regularly  to
maintain  the  competitiveness  of its credit card  products  and,  accordingly,
reserves the right (subject to the  limitations  discussed  below) to change the
terms of its  credit  card  accounts,  including  applicable  fees  and  finance
charges.  In response to market  conditions,  Citibank  (South Dakota)  recently
introduced certain account repricing initiatives, such as lower finance charges,
which may  decrease  the  Portfolio  Yield but  which,  in  themselves,  are not
expected  to cause an Early  Amortization  Event.  A  decrease  in the  periodic
finance charge would decrease the effective yield on such accounts and could, if
the Portfolio Yield (averaged over any three  consecutive Due Periods) were less
than the Base Rate,  result in the  occurrence of an Early  Amortization  Event.
Additional  factors  that  individually  may  affect  the  Portfolio  Yield  and
therefore contribute to the occurrence of an Early Amortization Event include an
increase in  charge-offs  or expenses  and a reduction in the gross yield on the
Trust's assets.    

         The Base Rate and level of credit enhancement initially analyzed by the
Rating  Agencies was determined to provide for the ultimate  return of principal
of and the full and timely payment of interest on the Investor  Certificates  at
risk levels  commensurate  with the ratings  assigned by such Rating Agencies to
such Investor Certificates. The Rating Agencies' analyses with respect to credit
card receivables  have evolved since the 
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issuance  of the  Investor  Certificates,  such that the  Rating  Agencies  have
advised the Banks that they will confirm that the adoption of the Amendment will
not  result  in  a  reduction  in  their  respective  ratings  of  the  Investor
Certificates  nor will  any  increase  in  credit  enhancement  be  required  in
connection with such confirmation. In 1991, the Banks solicited and received the
consent of holders of the investor  certificates issued by five trusts to reduce
the extent of base rate protection  applicable to each such trust by 2.30%, from
4.50% to 2.20%.  Since such  reduction,  cash flow has remained  sufficient with
respect to each such trust such that no Early  Amortization  Event has  occurred
and  either  interest  and  principal  with  respect  to  the  related  investor
certificates  were  paid  in  full or  interest  is  being  paid  currently.  No
representation  can be made,  however,  that, in the event that the Amendment is
adopted,  the results  with respect to those  trusts will be  indicative  of the
future performance of the Trust.    

         The current Base Rate is equal to the higher of the Class A Certificate
Rate or the Class B Certificate  Rate plus 2.2%.  The proposed  Amendment  would
require that Interchange  constitute the only source for payment of a portion of
the Servicing Fee. The Servicing Fee would be reduced to be equal to the product
of  1.87%  and  the  principal  receivables  as of the  last  day of the  second
preceding Due Period. Only the portion of the Servicing Fee that is not required
to be paid from Interchange  could be paid from amounts  generally  available in
the collection  account in respect of finance charge  receivables.  The Servicer
has  consented to the  reduction of the  Servicing Fee and to bear the risk that
Interchange  may not be  sufficient  to pay the  portion  of the  Servicing  Fee
required  to be paid from  Interchange,  which  portion is equal to 0.50% of the
principal receivables as of the last day of the second preceding Due Period.    

Servicing Fee and Interchange

         The Servicing Fee, which is paid to the Servicer monthly in arrears, is
paid out of collections in respect of finance  charge  receivables  deposited in
the collection  account after payment of current interest and defaulted  amounts
in respect of the Investor Certificates. Currently, all Interchange is deposited
as  collections  in  respect  of  finance  charge  receivables.  Even if, as the
Amendment provides, a portion of the Servicing Fee were required to be paid from
Interchange,  all  amounts on deposit  in the  collection  account in respect of
finance   charge   receivables,   including   amounts   designated  as  Servicer
Interchange,   would   continue  to  be   available   for  payment  to  Investor
Certificateholders  prior to any payment being made therefrom to the Servicer in
respect of the Servicing Fee.

Purpose of the Amendment

         The Banks recently reviewed the amount of Base Rate protection provided
with respect to the Trust and the minimum Portfolio Yield required to enable the
Trust to continue to make scheduled payments to Investor Certificateholders. The
Banks also  discussed  the  proposed  reduction  in the Base Rate and the use of
Servicer   Interchange  to  pay  Servicing   Fees  with  the  Rating   Agencies.
Notwithstanding  the factors  discussed above under  "Portfolio  Yield and Early
Amortization Event Risk," the Banks concluded that the Rating Agencies' analyses
of the Base Rate and required level of credit enhancement had changed,  creating
the possibility  that the Portfolio  Yield (averaged over any three  consecutive
Due Periods) could fall below the Base Rate, causing an Early Amortization Event
to occur at a time when the cash flows on the receivables held by the Trust were
sufficient,  in the absence of the occurrence of an Early Amortization Event, to
support the  ultimate  payment of  principal  of and full and timely  payment of
interest  on such  Investor  Certificates,  to the  degree  consistent  with the
ratings of such Investor Certificates.    


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         The Rating Agencies have agreed that adoption of the proposed Amendment
will not  result  in a  reduction  of their  respective  ratings  of the Class A
Certificates,  which  are  currently  rated  "AAA"  and  "Aaa",  or the  Class B
Certificates, which are currently rated "A".

         In light of these  factors,  the Banks' have proposed an Amendment that
would reduce the Base Rate by 0.70%.

         As discussed  above,  the effect of the Amendment will be to reduce the
likelihood that an Early  Amortization Event would arise from a reduction in the
Portfolio Yield on the receivables assigned to the Trust and, therefore,  reduce
the possibility of early  repayment of principal to Investor  Certificateholders
of the affected  Trust due to such  reduction.  The Banks believe  that,  absent
adoption of the Amendment,  such an Early Amortization Event and acceleration of
repayment  of principal on the  Investor  Certificates  could occur  (because of
requirements  of the Agreement  which  prevailed when the Investor  Certificates
were initially issued) at a time when cash flows on the receivables  assigned to
the Trust would still be sufficient,  to the degree  consistent with the ratings
of such Investor  Certificates,  to support the ultimate payment of principal of
and full and timely payment of interest on such Investor Certificates.  Investor
Certificateholders  could incur a loss as a result of the proposed  reduction in
the Base Rate if the  performance  of the  Trust's  assets  were  worse  than is
assumed by the Rating Agencies when they confirm their respective ratings of the
Investor  Certificates,  resulting in losses  greater than the available  credit
enhancement where such situation could have been avoided had the higher, current
Base Rate  triggered an Early  Amortization  Event early enough that such losses
would not have been greater than the available credit enhancement.    

         A  reduction  in the Base Rate under the  Amendment  would also  permit
Citibank (South Dakota) to decrease the cash flow on the receivables assigned to
the Trust to a level below that which is currently  permitted by taking  certain
actions to modify the terms of the revolving  credit card  accounts  under which
such  receivables  arise.  Citibank  (South Dakota)  reviews  market  conditions
regularly  to maintain  the  competitiveness  of its credit card  products  and,
accordingly,  reserves the right (subject to the limitations discussed below) to
change the terms of its credit card accounts,  including decreasing the periodic
finance charge assessed on balances in such accounts or other fees applicable to
the accounts (such as annual  membership  fees and late payment fees),  altering
the minimum  required  monthly  payment or changing  various  other terms of the
accounts.  In response to market  conditions,  Citibank (South Dakota)  recently
introduced  certain  account  repricing   initiatives  which  may  decrease  the
Portfolio  Yield but which,  in  themselves,  are not expected to cause an Early
Amortization  Event.  Such  initiatives  could help Citibank  (South  Dakota) to
increase or maintain its market share of the credit card business.    

Terms of the Amendment

         The  definition  of the term  "Base  Rate" in the  Agreement  currently
states that the Base Rate for such Trust is equal to (a) the higher of the Class
A Certificate Rate and the Class B Certificate Rate plus (b) 2.2% per annum.    

         The Amendment will replace "2.2%" in such definition with "1.50%".

         The Agreement  currently  provides for the payment of the Servicing Fee
from  collections of finance charge  receivables on a monthly basis in an amount
equal to  one-twelfth  of the  product  of 2.15%  and the  amount  of  principal
receivables as of the last day of the second preceding Due Period.


                                       7

                                                                PRELIMINARY COPY


         The Amendment will replace "2.15%" in the appropriate provision of such
Agreement with "1.87%".

         The Amendment will provide further that a portion of such Servicing Fee
equal to 0.50% of the  principal  receivables  as of the last day of the  second
preceding Due Period may be paid only from  Interchange,  and if  Interchange is
not  sufficient to pay such portion of the Servicing  Fee, such portion will not
be paid.

   Rating Agency Confirmation and Credit Enhancer's Approval

         The  effectiveness of the Amendment,  by its terms,  will be subject to
the receipt by the Trustee of letters from the Rating  Agencies  confirming that
such  Amendment  will not result in a reduction or  withdrawal  of their current
ratings of the Investor Certificates. In addition, the approval of the Amendment
requires the consent of the Credit Enhancer.  There can be no assurance that the
Credit Enhancer will agree to consent to the Amendment.    

Financial Information

         Attached  hereto as Exhibit I is a chart which sets forth the following
information  with  respect  to the  Trust,  which  experience  does  not  differ
materially  from that of the  industry  in  general,  for each month in the year
ended December 31, 1995 and each month in the nine-month  period ended September
25, 1996, each expressed as a percentage of the principal amount of the Investor
Certificates:  (a) the total yield (which is equal to the amount of  collections
of finance charge  receivables  during the preceding Due Period);  (b) principal
net  credit  losses  (which  is equal to the  amount  of  charged-off  principal
receivables net of recoveries of charged-off principal receivables); and (c) the
amount of available credit support.  Exhibit I also sets forth the following for
the same periods, in each case expressed as a percentage of the sum of principal
receivables  and  finance  charge  receivables  outstanding:  (d) the  aggregate
outstanding  balance  of  accounts  delinquent  by 35 to 64  days;  and  (e) the
aggregate outstanding balance of accounts delinquent by 65 to 184 days. Attached
hereto  as  Exhibit  II is a chart  which  sets  forth  the  monthly  base  rate
protection,  monthly  Portfolio  Yield and level of excess  cash  (which for any
particular  period is equal to (i) the Portfolio Yield for such period less (ii)
the Certificate Rate and such period's pro rata portion of applicable  servicing
fees) for each month in the year ended  December  31, 1995 and each month in the
nine-month  period ended September 25, 1996, as well as the three-month  average
of such  base rate  protection  (which is equal to the  difference  between  the
monthly Portfolio Yield and the Base Rate),  Portfolio Yield and level of excess
cash for the same periods.    

         As Exhibit I indicates, although delinquencies have remained relatively
stable during the past twelve  months,  charge-offs  have risen and total yield,
accordingly,  has  declined.  Exhibit  II  reflects  a  decrease  in  base  rate
protection  and  portfolio  yield,  which  results  largely from the increase in
charge-offs. See "Portfolio Yield and Early Amortization Event Risk".    


Federal Income Tax Considerations

         Based on advice of tax counsel,  the Banks believe that, under recently
adopted  Treasury  Regulations,  the  adoption of the  Amendment  would not be a
"significant  modification" to the Investor Certificates.  As a result, a holder
of Investor  Certificates  would not  recognize  gain or loss as a result of the
Amendment,  and future tax  consequences  to holders would be the same as if the
Amendment had not been adopted.    

                                       8

                                                                PRELIMINARY COPY



         However,  no IRS  ruling is being  obtained  that the  adoption  of the
Amendment is not a "significant  modification." As a result, no assurance can be
given  that the IRS  would  not  disagree  with  this  position,  although  such
disagreement is not believed  likely.  Moreover,  the Amendment might have other
tax  consequences  to particular  holders of Investor  Certificates  in light of
their own  circumstances.  As a result,  the above  discussion  is intended  for
general  information only, and holders of Investor  Certificates  should consult
their own tax advisors in determining  the federal,  state,  local and other tax
consequences of the Amendment.

Consents

         Authorization  of the  Amendment  requires  the  consent  of holders of
Investor   Certificates   representing   not   less   than   66   2/3%   of  the
Certificateholders'   Interest,   excluding  from  such   calculation   Investor
Certificates  owned  by the  Banks or any of  their  affiliates,  as well as the
consent of the Credit Enhancer.  No Investor Certificates are presently owned by
the Banks or, to their  knowledge,  by any  director  or  officer  of the Banks.
Investor  Certificates  may be owned by  affiliates of the Banks or directors or
officers of such  affiliates.  The  Certificateholders's  Interest is calculated
based on the Invested Amount,  which is generally defined under the Agreement as
an amount  equal to the  aggregate  initial  principal  amount  of the  Investor
Certificates  less (a) the  amount  of  principal  payments  previously  made to
Investor  Certificateholders  and (b) the excess, if any, of losses allocated to
the Investor Certificates over any such losses previously reimbursed.    

         Of  the  aggregate   Certificateholders'   Interest  of  $1,405,000,000
outstanding   as  of  September  __,  1996,   Certificateholders'   Interest  of
$936,666,667 is necessary to approve the Amendment.    

         All of the  Investor  Certificates  are held in the name of Cede & Co.,
whose address is 55 Water Street,  New York,  New York 10041.  Cede & Co. is the
nominee name of The Depositary Trust Company,  which is a securities  depositary
engaged  in,  among  other  things,  the  business  of  effecting   computerized
book-entry  transfers of securities  deposited with its participants,  which are
financial institutions such as brokerage firms and banks.

         To the best of the knowledge of the Banks,  no beneficial  owner of any
Investor  Certificate owns more than 5% of the securities permitted to vote with
respect to the Amendment.

Procedure for Consent

         Investor  Certificateholders  who are registered  holders on the Record
Date should complete,  sign and date the accompanying Consent in accordance with
the instructions set forth therein and deliver, by mail, by hand or by telecopy,
the Consent to D.F.  King & Co.,  Inc. A  postage-paid  envelope is enclosed for
that purpose.  Only a registered  holder of such Investor  Certificates (or such
holder's  authorized  legal  representative)  on the Record  Date may  execute a
Consent. Any beneficial owner of Investor Certificates who is not the registered
holder of such  Investor  Certificates  on the Record Date must arrange with the
registered holder to execute and deliver a Consent on its behalf.

         If a  Consent  relates  to  fewer  than all the  Investor  Certificates
registered in the name of the Investor Certificateholder providing such Consent,
such  Investor  Certificateholder  must  indicate on the  Consent the  aggregate
dollar amount of the  Certificateholders'  interest of the Investor Certificates
to which the Consent relates.  Otherwise the Consent will be deemed to relate to
all Investor Certificates  registered in the name of such holder at the close of
business on the Record Date.


                                       9

                                                                PRELIMINARY COPY


         The manner of obtaining Consents and of evidencing the authorization of
the execution thereof by Investor  Certificateholders shall be determined by the
Trustee and shall be subject to such reasonable  requirements as the Trustee may
prescribe.

Revocation of Consents

         Any  Investor  Certificateholder  who gives its Consent to an Amendment
may not revoke  such  Consent.  Any  Investor  Certificateholder  who opposes or
abstains with respect to an Amendment on the  accompanying  form may revoke such
opposition or abstention and give its Consent to the Amendment (by delivering to
D.F. King & Co., Inc. such Consent on the  accompanying  form) at any time prior
to the Solicitation  Expiration Date. IF A PROPERLY EXECUTED CONSENT IS RETURNED
WITH NO  INSTRUCTIONS  GIVEN WITH RESPECT TO THE AMENDMENT,  THE CONSENT WILL BE
DEEMED TO BE IN FAVOR OF SUCH AMENDMENT.

Effective Date of Amendment

         The  Banks  and the  Trustee  will  execute  the  Amendment  as soon as
practicable  after the  Solicitation  Expiration Date if the requisite number of
Consents to such  Amendment and the consent of the Credit  Enhancer is obtained.
The Amendment will be deemed to become effective as of the end of the Due Period
immediately preceding the Due Period in which the Amendment is executed, subject
to receipt of confirmation from the Rating Agencies that such Amendment will not
result in a reduction  or  withdrawal  of their  current  rating of the Investor
Certificates.  After the Amendment becomes effective,  it will bind all Investor
Certificateholders  regardless of whether they  consented to the adoption of the
Amendment.    

Other Matters

         Directors,  officers  and  employees of the Banks may engage in further
solicitation  of  Consents  by wire,  mail or  telephone  or in person,  without
compensation therefor other than reimbursement of expenses.

         The Banks  have  retained  D.F.  King & Co.,  Inc.  to assist  with the
Solicitation for a fee not expected to exceed $7,500 exclusive of expenses.

         All costs of the  Solicitation  will be borne by the  Banks.  The Banks
will pay brokerage  houses and other  custodians,  nominees and  fiduciaries the
reasonable  out-of-pocket expenses incurred by them in forwarding copies of this
solicitation  statement  and  the  Consent  and  any  related  documents  to the
beneficial  owners of the Investor  Certificates  held of record by such persons
and in forwarding Consents to their customers.



                                       10

                                                                PRELIMINARY COPY


Consents should be sent to:

         D.F. King & Co., Inc.
         77 Water Street, 20th Floor
         New York, New York 10005
         Attention: Thomas Long
         Telecopy Number: (212) 809-8839

         If you wish to obtain additional copies of the solicitation  materials,
please  telephone  D.F.  King & Co.,  Inc., at (212)  425-1685.  If you have any
questions  regarding the  solicitation  materials,  please telephone Hugh F. Van
Deventer of Citicorp Credit Services, Inc. at (718) 248-5163.

         The mailing  addresses of the principal  executive offices of the Banks
are:

         Citibank (South Dakota), N.A.
         701 East 60th Street, North
         Sioux Falls, South Dakota 57117

         Citibank (Nevada), National Association
         8725 West Sahara Avenue
         Las Vegas, Nevada 89163

         These  addresses  are set  forth in order to comply  with  rules of the
Securities and Exchange Commission  governing the Solicitation.  Consents should
be delivered,  mailed or  telecopied  only to D.F. King & Co., Inc. at the above
address. Under no circumstances should Consents be mailed to the Banks.

         PLEASE INDICATE YOUR CONSENT BY EXECUTING THE ENCLOSED CONSENT FORM AND
RETURNING IT PROMPTLY IN THE ENCLOSED POSTAGE-PAID ENVELOPE OR BY TELECOPY. YOUR
FAILURE  TO ACT WILL  HAVE THE  SAME  EFFECT  AS IF YOU HAD  VOTED  AGAINST  THE
AMENDMENT.

                                       11


                                                                       EXHIBIT I
                                               STANDARD CREDIT CARD TRUST 1990-6


                      NET             AVAILABLE
           TOTAL      PRINCIPAL        CREDIT   DELINQUENT    DELINQUENT
           YIELD      LOSSES           SUPPORT  35-64 DAYS    65-184 DAYS

SEP-96   18.85%       5.41%            7.72%     2.15%           3.09%
AUG-96   18.31%       4.59%            7.04%     2.05%           2.99%
JUL-96   18.73%       5.02%            6.48%     1.95%           2.84%
JUN-96   19.75%       4.97%            6.00%     1.92%           2.81%
MAY-96   18.64%       4.69%            6.00%     1.93%           2.84%
APR-96   19.46%       5.46%            6.00%     1.85%           2.88%
MAR-96   19.49%       4.89%            6.00%     1.99%           2.97%
FEB-96   18.98%       4.34%            6.00%     2.06%           2.97%
JAN-96   18.76%       4.25%            6.00%     2.21%           2.99%
DEC-95   19.44%       4.66%            6.00%     2.26%           2.96%
NOV-95   18.53%       3.68%            6.00%     2.02%           2.98%
OCT-95   19.17%       4.00%            6.00%     2.12%           2.76%
SEP-95   18.70%       3.96%            6.00%     2.10%           2.77%
AUG-95   18.76%       3.98%            6.00%     1.98%           2.66%
JUL-95   18.63%       4.02%            6.00%     1.88%           2.74%
JUN-95   18.37%       4.02%            6.00%     1.95%           2.74%
MAY-95   19.09%       4.26%            6.00%     1.82%           2.83%
APR-95   18.99%       4.14%            6.00%     1.85%           2.94%
MAR-95   19.48%       3.99%            6.00%     1.98%           3.18%
FEB-95   19.24%       4.46%            6.00%     2.14%           3.17%
JAN-95   18.63%       4.29%            6.00%     2.32%           3.13%

NOTE: Each of the foregoing terms is defined in the accompanying Solicitation 
Statement.



                                                                PRELIMINARY COPY

                                                                      EXHIBIT II
                                               STANDARD CREDIT CARD TRUST 1990-6


                                           3 MONTH AVG  3 MONTH AVG
        BASE RATE    PORTFOLIO    EXCESS   BASE RATE    PORTFOLIO   3 MONTH AVG
        PROTECTION   YIELD        CASH     PROTECTION    YIELD     EXCESS CASH 

SEP-96   1.62%       13.44%       1.89%      1.80%       13.62%         2.07%
AUG-96   1.90%       13.72%       2.17%      2.25%       14.07%         2.52%
JUL-96   1.89%       13.71%       2.16%      2.32%       14.15%         2.60%
JUN-96   2.96%       14.78%       3.23%      2.42%       14.24%         2.69%
MAY-96   2.13%       13.95%       2.40%      2.36%       14.18%         2.63%
APR-96   2.18%       14.00%       2.45%      2.59%       14.41%         2.86%
MAR-96   2.78%       14.60%       3.05%      2.76%       14.58%         3.03%
FEB-96   2.82%       14.64%       3.09%      2.82%       14.64%         3.09%
JAN-96   2.69%       14.51%       2.96%      2.89%       14.71%         3.16%
DEC-95   2.95%       14.78%       3.23%      3.11%       14.93%         3.38%
NOV-95   3.03%       14.85%       3.30%      3.10%       14.92%         3.37%
OCT-95   3.35%       15.17%       3.62%      3.07%       14.90%         3.35%
SEP-95   2.92%       14.74%       3.19%      2.89%       14.71%         3.16%
AUG-95   2.96%       14.78%       3.23%      2.76%       14.58%         3.03%
JUL-95   2.79%       14.61%       3.06%      2.77%       14.60%         3.05%
JUN-95   2.53%       14.35%       2.80%      2.85%       14.68%         3.13%
MAY-95   3.01%       14.83%       3.28%      3.23%       15.06%         3.51%
APR-95   3.03%       14.85%       3.30%      3.22%       15.04%         3.49%
MAR-95   3.67%       15.49%       3.94%      3.05%       14.87%         3.32%
FEB-95   2.96%       14.78%       3.23%      7.06%       14.94%         2.01%
JAN-95   2.52%       14.34%       2.79%     11.07%       15.01%         0.93%

NOTE: Each of the foregoing terms is defined in the accompanying Solicitation 
Statement.



                                                              PRELIMINARY COPY

                                        
                                          APPENDIX A TO SOLICITATION STATEMENT


                                  FORM OF PROXY

                                     [FRONT]



                        STANDARD CREDIT CARD TRUST 1990-6

                                     CONSENT
            SOLICITED ON BEHALF OF CITIBANK (SOUTH DAKOTA), N.A. AND
                    CITIBANK (NEVADA), NATIONAL ASSOCIATION,
                    UNDER THE POOLING AND SERVICING AGREEMENT

                The undersigned holder of Credit Card Participation Certificates
(the "Certificates")  issued by Standard Credit Card Trust 1990-6 hereby

         [ ]  Consents to    [  ]   Opposes        [  ]  Abstains from voting on

the  execution  and  delivery of the  amendment  to the  Pooling  and  Servicing
Agreement  under  which  the  Certificates  were  issued,  as set  forth  in the
Solicitation   Statement,   dated   [September  23],  1996  (the   "Solicitation
Statement"),  by Citibank (South Dakota),  N.A. and Citibank (Nevada),  National
Association  (collectively,  the  "Banks") to the  holders of the  Certificates,
which amendment has been proposed by the Banks.

If you  indicate  an  amount  in the  following  space,  this  Consent  shall be
effective with respect to only the principal amount of Certificates indicated.

                                                  $--------------

If you leave the preceding  space blank,  this Consent  shall be effective  with
respect to all Certificates of which you are the beneficial owner.

                       (Please sign and date reverse side)



                                                                PRELIMINARY COPY


                                    [REVERSE]




IF THIS CONSENT IS SIGNED BUT NOT MARKED
 ON THE REVERSE  SIDE,  IT WILL BE DEEMED      Date:____________________________
 TO BE IN FAVOR OF THE AMENDMENT.


                                               Signature



                                               Signature (if held jointly)


                                               Please date and sign as your name
                                               appears  hereon and return in the
                                               enclosed  envelope or by telecopy
                                               as provided  in the  Solicitation
                                               Statement. If acting as executor,
                                               administrator,     trustee     or
                                               guardian,  you should so indicate
                                               when signing.  If the signer is a
                                               corporation,   please   sign  the
                                               corporate name by duly authorized
                                               officer. If Certificates are held
                                               in the  name  of  more  than  one
                                               person,  each   Certificateholder
                                               should sign the Consent.


                                                               PRELIMINARY COPY

                                  EXHIBIT INDEX

EXHIBIT NO.                EXHIBIT                                     PAGE

1                          Letter to Certificateholders

                                                                       EXHIBIT 1
                                                                PRELIMINARY COPY
                                                    LETTER TO CERTIFICATEHOLDERS



                                [CCSI LETTERHEAD]


                                                            [October __], 1996


To the Holders of the Credit Card Participation
  Certificates of Standard Credit Card Trust 1990-6

         This  letter  is being  mailed  to you on  behalf  of  Citibank  (South
Dakota), N.A., and Citibank (Nevada),  National Association  (collectively,  the
"Banks"), as originators of the above-named Trust (the "Trust").  The purpose of
this letter and the  accompanying  materials  is to obtain  your  consent to the
execution  of an  amendment  (the  "Amendment")  to the  Pooling  and  Servicing
Agreement  (the  "Agreement")   pursuant  to  which  Credit  Card  Participation
Certificates  (collectively,  the  "Investor  Certificates")  were issued by the
Trust. The Amendment would, among other things, reduce the applicable Base Rate,
as such term is  defined  in the  related  Agreement,  by 0.70% per  annum.  The
Amendment  and the reasons  why the Banks seek your  approval to adoption of the
Amendment are discussed in the accompanying Solicitation Statement.

         Only a registered  holder of an Investor  Certificate  of the Trust (or
such  holder's  authorized  legal  representative)  at the close of  business on
[September  __], 1996, the record date, may execute a consent,  and such consent
will be binding on all subsequent transferees of such Investor Certificate.  Any
beneficial owner of Investor  Certificates  that is not the registered holder of
such Investor  Certificate  on the record date must arrange with the  registered
holder to execute and deliver a consent on its behalf.

         Regardless  of the size of your  holdings,  your  consent is  important
because in order to implement an Amendment consents from the holders of Investor
Certificates  of the Trust  representing  not less than 66 2/3% of the undivided
interest in the Trust must be received. Failure to complete and return a consent
form will have the effect of a negative vote.

         Any Investor  Certificateholder  who gives its consent to the Amendment
may not revoke its consent.

         A  Solicitation  Statement,  a Consent Form and a return,  postage-paid
envelope  are  enclosed.  If  you  wish  to  obtain  additional  copies  of  the
accompanying materials, please telephone Thomas Long of D.F. King & Co., Inc. at
(212)  425-1685.  If you have questions  regarding the  accompanying  materials,
please telephone Hugh F. Van Deventer of Citicorp Credit Services, Inc. at (718)
248-5163.

         We urge you to complete,  sign,  date and return the  enclosed  consent
form as soon as possible.

                                           Very truly yours,

                                           [Title]