BA MASTER CREDIT CARD TRUST /
8-K, 1997-05-28
ASSET-BACKED SECURITIES
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<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

                     PURSUANT TO SECTION 13 OR 15 (d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

                                  MAY 28, 1997
                        (date of earliest event reported)

                      BANK OF AMERICA NATIONAL ASSOCIATION
             (Exact name of registrant as specified in its charter)



         U.S.A.                    333-4152               86-0645265
- --------------------------------------------------------------------------------
(State or Other Jurisdiction       (Commission            (I.R.S. Employer
of Incorporation)                  File Number)           Identification number)


1825 East Buckeye Road
Phoenix, Arizona                                             85034
- --------------------------------------------------------------------------------
(Address of Principal Executive Offices)                     (Zip Code)


                                 (602) 597-3738
              (Registrant's telephone number, including area code)

                                       N/A
          (Former Name or Former Address, if Changed Since Last Report)
<PAGE>   2
INFORMATION TO BE INCLUDED IN THE REPORT


Items 1-4.        Not Applicable.

Item 5.           Not Applicable.

Item 6.           Not Applicable.

Item 7.           Exhibits.

                  The following are filed as Exhibits to this Report under
                  Exhibits 20.1, 20.2, 20.3, 20.4.

                  Exhibit 20.1      Amended Monthly Payment Instructions and
                                    Notification to the Trustee, dated as of
                                    March 31, 1997

                  Exhibit 20.2      Amended Monthly Series 1996-A
                                    Certificateholders' Statement, dated as of
                                    March 31, 1997

                  Exhibit 20.3      Amended Schedule to Monthly Servicer's
                                    Certificate, dated as of March 31, 1997

                  Exhibit 20.4      Amended Monthly Servicer's Certificate,
                                    dated as of March 31, 1997


                                   SIGNATURES

                  Pursuant to the requirements of the Securities Exchange Act of
1934, as amended, the registrant has duly caused this report to be signed on its
behalf by the undersigned hereunto duly authorized.


                                    BANK OF AMERICA NATIONAL ASSOCIATION

                                    Transferor and Servicer


                                    By:________________________________________
                                           Name:  Margaret A. Sprude
                                           Title: SVP & Chief Financial Officer


Date:  May 28, 1997
<PAGE>   3
                                INDEX TO EXHIBITS


<TABLE>
<CAPTION>
Exhibit
Number                     Exhibit Description
- ------                     -------------------
<S>                        <C>
20.1                       Amended Monthly Payment Instructions and
                           Notification to the Trustee, dated as of March 31,
                           1997

20.2                       Amended Monthly Series 1996-A Certificateholders'
                           Statement, dated as of March 31, 1997

20.3                       Amended Schedule to Monthly Servicer's Certificate,
                           dated as of March 31, 1997

20.4                       Amended Monthly Servicer's Certificate, dated as of
                           March 31, 1997
</TABLE>

<PAGE>   1
                                                                         EX-20.1

              AMENDED MONTHLY PAYMENT INSTRUCTIONS AND NOTIFICATION
                                 TO THE TRUSTEE
                      BANK OF AMERICA NATIONAL ASSOCIATION
                    BA MASTER CREDIT CARD TRUST SERIES 1996-A
                      MONTHLY PERIOD ENDING MARCH 31, 1997

         Capitalized terms used in this notice have their respective meanings
set forth in the Pooling and Servicing Agreement. References herein to certain
sections and subsections are references to the respective sections and
subsections of the Pooling and Servicing Agreement as supplemented by the Series
1996-A Supplement. This notice is delivered pursuant to Section 4.09.

    A.   Bank of America is the Servicer under the Pooling and Servicing
         Agreement.

    B.   The undersigned is a Servicing Officer.

    C.   The date of this notice is on or before the related Transfer Date under
         the Pooling and Servicing Agreement.

I.       INSTRUCTION TO MAKE A WITHDRAWAL

         Pursuant to Section 4.09, the Servicer does hereby instruct the Trustee
(i) to make withdrawals from the Finance Charge Account, the Principal Account,
and the Principal Funding Account on APRIL 14, 1997, which date is a Transfer
Date under the Pooling and Servicing Agreement, in aggregate amounts set forth
below in respect of the following amounts and (ii) to apply the proceeds of such
withdrawals in accordance with subsection 3 (a) of the Series 1996-A Supplement
and Section 4.09 of the Pooling and Servicing Agreement:


<TABLE>
<S>                                                           <C>
A.                Pursuant to subsection 3 (a) of the
                  Series 1996-A Supplement:

                  1.       Servicer Interchange.............. $     416,666.67
                                                              ----------------

B.                Pursuant to subsection 4.09 (a) (i):

                  1.       Class A Monthly Interest at the 
                           Class A Certificate Rate on the
                           Class A Investor Interest......... $   1,917,307.81
                                                              ----------------

                  2.       Class A Deficiency Amount......... $           0.00
                                                              ----------------

                  3.       Class A Additional Interest....... $           0.00
                                                              ----------------

C.                Pursuant to subsection 4.09 (a) (ii):

                  1.       Class A Servicing Fee............. $     356,250.00
                                                              ----------------
</TABLE>


                                      B-1
<PAGE>   2
<TABLE>
<S>                                                           <C>
                  2.       Accrued and unpaid Class A 
                           Servicing Fee..................... $           0.00
                                                              ----------------

D.                Pursuant to subsection 4.09 (a) (iii):
                  1.      Class A Investor Default Amount.... $   2,444,290.30
                                                              ----------------

E.                Pursuant to subsection 4.09 (a) (iv):
                  1.      Portion of Excess Spread from 
                          Class A Available Funds to be
                          allocated and distributed as 
                          provided in Section 4.11........... $   1,839,997.07
                                                              ----------------

F.                Pursuant to subsection 4.09 (b) (i):
                  1.      Class B Monthly Interest at the 
                          Class B Certificate Rate on
                          the Class B Investor Interest...... $     149,949.13
                                                              ----------------

                  2.       Class B Deficiency Amount......... $           0.00
                                                              ----------------

                  3.       Class B Additional Interest....... $           0.00
                                                              ----------------

G.                Pursuant to subsection 4.09 (b) (ii):
                  1.       Class B Servicing Fee............. $      27,083.33
                                                              ----------------

                  2.       Accrued and unpaid Class B 
                           Servicing Fee..................... $           0.00
                                                              ----------------

H.                Pursuant to subsection 4.09 (b) (iii):
                  1.      Portion of Excess Spread from 
                          Class B Available Funds to be
                          allocated and distributed as 
                          provided in Section 4.11........... $     321,517.16
                                                              ----------------

I.                Pursuant to subsection 4.09 (c) (i):
                  1.      Collateral Interest Servicing 
                          Fee, if applicable................. $            N/A
                                                              ----------------

                  2.      Accrued and unpaid Collateral 
                          Interest Servicing Fee, if
                          applicable......................... $            N/A
                                                              ----------------

J.                Pursuant to subsection 4.09 (c) (ii):

                  1.      Portion of Excess Spread from 
                          Collateral  Available  Funds to
                          be allocated and distributed as 
                          provided  in  Section 4.11......... $     613,599.57
                                                              ----------------

                          Total.............................. $   8,086,661.04
                                                              ================
</TABLE>


                                       B-2
<PAGE>   3
<TABLE>
<S>                                                           <C>
K.                Pursuant to subsection 4.09 (d) (ii):
                  1.      Amount to be treated as Shared 
                          Excess Principal Collections....... $           0.00
                                                              ----------------


L.                Pursuant to subsection 4.09 (d) (iii):
                  1.      Amount to be  paid to the  
                          Holder of  the  Transferor
                          Certificate........................ $  62,966,910.00
                                                              ----------------

                  2.      Unallocated Principal Collections.. $           0.00
                                                              ----------------


M.                Pursuant to subsection 4.09 (e) (i):
                  1.      Class A Monthly Principal.......... $           0.00
                                                              ----------------


N.                Pursuant to subsection 4.09 (e) (ii):
                  1.      Class B Monthly Principal.......... $           0.00
                                                              ----------------


O.                Pursuant to subsection 4.09 (e) (iii)
                  1.      Collateral Monthly Principal to 
                          be applied in accordance with
                          the Loan Agreement................. $           0.00
                                                              ----------------

P.                Pursuant to subsection 4.09 (e) (iv):
                  1.      Amount to be treated as Shared 
                          Excess Principal Collections....... $           0.00
                                                              ----------------

Q.                Pursuant to subsection 4.09 (e) (v):
                  1.      Amount to be paid to the Holder 
                          of the Transferor Certificate...... $           0.00
                                                              ----------------

                  2.       Unallocated Principal Collections. $           0.00
                                                              ----------------


R.                Pursuant to subsection 4.09 (f):

                  1.      Amount to be withdrawn from the 
                          Principal Funding Account and
                          deposited into the Distribution 
                          Account............................ $           0.00
                                                              ----------------

S.                Pursuant to Section 4.13:

                  1.      Amount of Shared Excess Finance 
                          Charge Collections to be
                          withdrawn from the Finance Charge 
                          account to be allocated to
                          Series 1996-A and distributed as 
                          provided in Section 4.11........... $           0.00
                                                              ----------------

</TABLE>

                                      B-3
<PAGE>   4
II.      INSTRUCTION TO MAKE CERTAIN PAYMENTS

                  Pursuant to Section 4.09, the Servicer does hereby instruct
the Trustee to pay in accordance with Section 5.01 from the Distribution Account
on APRIL 15, 1997, which date is a Distribution Date under the Pooling and
Servicing Agreement, amounts so deposited in the Distribution Account pursuant
to Section 4.09 as set forth below:

<TABLE>
<S>                                                           <C>
A.            Pursuant to subsection 4.09 (g):

                  1.       Amount to be distributed to 
                           Class A  Certificateholders....... $   1,917,307.81
                                                              ----------------

                  2.       Amount to be distributed to 
                           Class B  Certificateholders....... $     149,949.13
                                                              ----------------

B.            Pursuant to subsection 4.09 (h) (i):

                  1.      Amount to be distributed to 
                          Class A  Certificateholders........ $           0.00
                                                              ----------------

C.            Pursuant to subsection 4.09 (h) (ii):

                  1.      Amount to be distributed to 
                          the  Class B Certificateholders.... $           0.00
                                                              ----------------
</TABLE>


III.     APPLICATION OF EXCESS SPREAD

                  Pursuant to Section 4.11, the Servicer does hereby instruct
the Trustee to apply the Excess Spread with respect to the related Monthly
Period and to make the following distributions in the following priority:

<TABLE>
<S>                                                           <C>
A.                The amount equal to the Class A 
                  Required Amount, if any, which will be
                  used to fund the Class A Required 
                  Amount and be applied in accordance
                  with, and in the priority set forth in, 
                  subsection 4.09 (a)........................ $           0.00
                                                              ----------------

B.                The 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 Transfer Date of certain other 
                  amounts applied for that purpose) which 
                  will be treated as a portion of Investor 
                  Principal Collections and deposited into 
                  the Principal Account on such Transfer 
                  Date....................................... $           0.00
                                                              ----------------
</TABLE>



                                       B-4
<PAGE>   5
<TABLE>
<S>                                                           <C>
C.               The amount equal to the Class B Required
                 Amount, if any, which will be used to fund
                 the Class B Required Amount and be applied
                 first in accordance with, and in the
                 priority set forth in, subsection 4.09(b)
                 and then any amount available to pay the
                 Class B Investor Default Amount shall be
                 treated as a portion of Investor Principal
                 Collections and deposited into the
                 Principal Account........................... $     185,823.24
                                                              ----------------


D.               The amount equal to the aggregate amount
                 by which the Class B Investor Interest has
                 been reduced below the initial Class B
                 Investor Interest for reasons other than
                 the payment of principal to the Class B
                 Certificateholders (but not in excess of
                 the aggregate amount of such reductions
                 which have not been previously reimbursed)
                 which will be treated as a portion of
                 Investor Principal Collections
                 and deposited into the Principal Account.... $           0.00
                                                              ----------------


E.               The amount equal to the Collateral Monthly
                 Interest plus the amount of any past due
                 Collateral Monthly Interest which will be
                 paid to the Collateral Interest Holder for
                 application in accordance with the Loan
                 Agreement................................... $     188,097.22
                                                              ----------------


F.               The amount equal to the aggregate amount
                 of accrued but unpaid Collateral Interest
                 Servicing Fees which will be paid to the
                 Servicer if the Transferor or an
                 Acceptable Successor Servicer is the
                 Servicer.................................... $      33,333.34
                                                              ----------------


G.               The amount equal to the Collateral Default
                 Amount, if any, for the prior Monthly
                 Period which will be treated as a portion
                 of Investor Principal Collections and
                 deposited into the Principal Account........ $     228,705.52
                                                              ----------------


H.               The amount equal to the aggregate amount
                 by which the Collateral Interest has been
                 reduced below the Required Collateral
                 Interest for reasons other than the
                 payment of principal to the Collateral
                 Interest Holder (but not in excess of the
                 aggregate amount of such reductions which
                 have not been previously reimbursed) which
                 will be treated as a portion of Investor
                 Principal Collections and deposited
                 into the Principal Account.................. $           0.00
                                                              ----------------
</TABLE>



                                       B-5
<PAGE>   6
<TABLE>
<S>                                                            <C>
I.                On each Transfer Date from and after the
                  Reserve Account Funding Date, but prior to
                  the date on which the Reserve Account
                  terminates as described in subsection 4.16
                  (f), the amount up to the excess, if any,
                  of the Required Reserve Account Amount
                  over the Available Reserve Account Amount
                  which shall be deposited into the Reserve
                  Account..................................... $           0.00
                                                               ----------------

J.                The balance, if any, after giving effect
                  to the payments made pursuant to
                  subparagraphs (a) through (i) above which
                  shall be deposited into the Distribution
                  Account and applied in accordance with the
                  provisions of the Loan Agreement............ $   2,139,154.48
                                                               ----------------
</TABLE>


IV.      REALLOCATED PRINCIPAL COLLECTIONS

                  Pursuant to Section 4.12, the Servicer does hereby instruct
the Trustee to withdraw from the Principal Account and apply Reallocated
Principal Collections pursuant to Section 4.12 with respect to the related
Monthly Period in the following amounts:

<TABLE>
<S>                                                            <C>
       A.         Reallocated Collateral Principal 
                  Receivables................................. $           0.00
                                                               ----------------

       B.         Reallocated Class B Principal 
                  Receivables................................. $           0.00
                                                               ----------------
</TABLE>


V        ACCRUED AND UNPAID AMOUNTS

                  After giving effect to the withdrawals and transfers to be
made in accordance with this notice, the following amounts will be accrued and
unpaid with respect to all Monthly Periods preceding the current calendar month.

<TABLE>
<S>                                                            <C>
A.           Subsections 4.09 (a) (i) and (b) (i) :

                  (1)     The aggregate amount of the 
                          Class A Deficiency Amount........... $           0.00
                                                               ----------------

                  (2)     The aggregate amount of Class 
                          B Deficiency Amount................. $           0.00
                                                               ----------------


B.           Subsections 4.09 (a) (ii) and (b) (ii):

                  The aggregate amount of all accrued 
                  and unpaid Investor Monthly 
                  Servicing Fees.............................. $           0.00
                                                               ----------------

C.           Section 4.10:

                  The aggregate amount of all 
                  unreimbursed  Investor Charge Offs.......... $           0.00
                                                               ----------------
</TABLE>


                                       B-6
<PAGE>   7
IN WITNESS WHEREOF, the undersigned has duly executed this certificate this 28th
day of MAY, 1997.


                             BANK OF AMERICA NATIONAL
                                    ASSOCIATION

                                    Transferor and Servicer


                             BY:    /S/ MARGARET A. SPRUDE
                                ------------------------------------------------
                                    Name:  Margaret A. Sprude
                                    Title:    SVP & Chief Financial Officer


                                      B-7

<PAGE>   1
                                                                         EX-20.2

           AMENDED MONTHLY SERIES 1996-A CERTIFICATEHOLDERS' STATEMENT

                                  Series 1996-A

                      BANK OF AMERICA NATIONAL ASSOCIATION


                           BA MASTER CREDIT CARD TRUST


         The information which is required to be prepared with respect to the
distribution date of APRIL 15, 1997, and with respect to the performance of the
Trust during the related Monthly Period.

         Capitalized terms used in this Statement have their respective meanings
set forth in the Pooling and Servicing Agreement.


<TABLE>
<S>                                                            <C> 
         A.       Information Regarding the Current Monthly
                  Distribution (Stated on the Basis of $1,000
                  Original Certificate Principal Amount)

                  1.      The amount of the current monthly 
                          distribution in respect of
                          Class A Monthly Principal........... $          0.00000
                                                               ------------------

                  2.      The amount of the current monthly
                          distribution in respect of Class B
                          Monthly Principal................... $          0.00000
                                                               ------------------

                  3.      The amount of the current monthly
                          distribution in respect of
                          Collateral Monthly Principal........ $          0.00000
                                                               ------------------

                  4.      The amount of the current monthly
                          distribution in respect of
                          Class A Monthly Interest............ $          4.48493
                                                               ------------------

                  5.      The amount of the current monthly
                          distribution in respect of
                          Class A Deficiency Amounts.......... $          0.00000
                                                               ------------------

                  6.      The amount of the current monthly
                          distribution in respect of
                          Class A Additional Interest......... $          0.00000
                                                               ------------------

                  7.      The amount of the current monthly
                          distribution in respect of
                          Class B Monthly Interest............ $          4.61382
                                                               ------------------
</TABLE>


                                      C-1
<PAGE>   2
<TABLE>
<S>                                                            <C>
             8.   The amount of the current monthly
                  distribution in respect of Class B
                  Deficiency Amounts.......................... $          0.00000
                                                                -----------------

             9.   The amount of the current monthly
                  distribution in respect of Class B
                  Additional Interest......................... $          0.00000
                                                                -----------------

            10.   The amount of the current monthly
                  distribution in respect of Collateral
                  Monthly Interest............................ $          4.70243
                                                                -----------------

            11.   The amount of the current monthly
                  distribution in respect of any accrued
                  and unpaid Collateral Monthly Interest...... $          0.00000
                                                                -----------------

      B.    Information Regarding the Performance of the Trust

             1.   Collection of Principal Receivables

                  (a)   The aggregate amount of Collections of
                        Principal Receivables processed during
                        the related Monthly Period which were
                        allocated in respect of the Class A
                        Certificates.......................... $    51,392,417.75
                                                                -----------------

                  (b)   The aggregate amount of Collections of
                        Principal Receivables processed during
                        the related Monthly Period which were
                        allocated in respect of the Class B
                        Certificates.......................... $     3,907,025.91
                                                                -----------------

                  (c)   The aggregate amount of Collections of
                        Principal Receivables processed during
                        the related Monthly Period which were
                        allocated in respect of the Collateral
                        Interest.............................. $     4,808,647.28
                                                                -----------------

             2.   Principal Receivables in the Trust

                  (a)   The aggregate amount of Principal
                        Receivables in the Trust as of the
                        end of the day on the last day of
                        the related Monthly Period............ $ 3,753,305,113.62
                                                                -----------------

                  (b)   The amount of Principal Receivables
                        in the Trust represented by the
                        Investor Interest of Series 1996-A
                        as of the end of the day on the
                        last day of the related Monthly
                        Period................................ $   500,000,000.00
                                                                -----------------
</TABLE>


                                      C-2
<PAGE>   3
<TABLE>
<S>                                                            <C>
                  (c)   The amount of Principal Receivables
                        in the Trust represented by the
                        Series 1996-A Adjusted Investor
                        Interest as of the end of day on
                        the last day of the related Monthly
                        Period................................ $   500,000,000.00
                                                                -----------------

                  (d)   The amount of Principal Receivables
                        in the Trust represented by the
                        Class A Investor Interest as of the
                        end of the day on the last day of
                        the related Monthly Period............ $   427,500,000.00
                                                                -----------------

                  (e)   The amount of Principal Receivables
                        in the Trust represented by the
                        Class A Adjusted Investor Interest
                        as of the end of day on the last
                        day of the related Monthly Period..... $   427,500,000.00
                                                                -----------------

                  (f)   The amount of Principal Receivables
                        in the Trust represented by the
                        Class B Investor Interest as of the
                        end of the day on the last day of
                        the related Monthly Period............ $    32,500,000.00
                                                                -----------------

                  (g)   The amount of Principal Receivables
                         in the Trust represented by the
                        Collateral Interest as of the end
                        of the day on the last day of the
                        related Monthly Period................ $    40,000,000.00
                                                                -----------------

                  (h)   The Floating Investor Percentage
                        with respect to the related Monthly
                        Period................................           12.9928%
                                                                -----------------

                  (i)   The Class A Floating Allocation
                        with respect to the related Monthly
                        Period................................             85.50%
                                                                -----------------

                  (j)   The Class B Floating Allocation
                        with respect to the related Monthly
                        Period................................              6.50%
                                                                -----------------

                  (k)   The Collateral Floating Allocation
                        with respect to the related Monthly
                        Period................................              8.00%
                                                                -----------------

                  (l)   The Fixed Investor Percentage with
                        respect to the related Monthly
                        Period................................                N/A
                                                                -----------------
</TABLE>


                                      C-3
<PAGE>   4
<TABLE>
<S>                                                            <C>  
                  (m)   The Class A Fixed Allocation with
                        respect to the related Monthly
                        Period................................               N/A
                                                               -----------------

                  (n)   The Class B Fixed Allocation with
                        respect to the related Monthly
                        Period................................               N/A
                                                               -----------------

                  (o)   The Collateral Fixed Allocation
                        with respect to the related Monthly
                        Period................................               N/A
                                                               -----------------
</TABLE>


            3.    Delinquent Balances
                  The aggregate amount of outstanding balances in the Accounts
                  which were delinquent as of the end of the day on the last day
                  of the related Monthly Period:
<TABLE>
<CAPTION>

                                                   Aggregate       Percentage of
                                                    Account            Total
                                                    Balance         Receivables
                                                    -------         -----------
<S>                                             <C>                   <C>
                        (a) 31 - 60 days.....   $ 62,120,196.83        1.6317%
                        (b) 61 - 90 days.....   $ 36,976,964.55        0.9712%
                        (c) 91 - or more days   $ 66,999,915.41        1.7598%
                            Total............   $166,097,076.79        4.3627%
</TABLE>

            4.    Investor Default Amount

<TABLE>
<S>                                                           <C>
                  (a)   The Aggregate Investor Default
                        Amount for the related Monthly
                        Period............................... $     2,858,819.06
                                                               -----------------

                  (b)   The Class A Investor Default Amount
                        for the related Monthly Period....... $     2,444,290.30
                                                               -----------------

                  (c)   The Class B Investor Default Amount
                        for the related Monthly Period....... $       185,823.24
                                                               -----------------

                  (d)   The Collateral Default Amount for
                        the related Monthly Period........... $       228,705.52
                                                               -----------------

             5.   Investor Charge Offs

                  (a)   The aggregate amount of Class A
                        Investor Charge Offs for the
                        related Monthly Period............... $             0.00
                                                               -----------------

                  (b)   The aggregate amount of Class A
                        Investor Charge Offs set forth in
                        5(a) above per $1,000 of original
                        certificate principal amount......... $             0.00
                                                               -----------------
</TABLE>


                                      C-4
<PAGE>   5
<TABLE>
<S>                                                            <C>
                  (c)   The aggregate amount of Class B
                        Investor Charge Offs for the
                        related Monthly Period................ $             0.00
                                                                -----------------

                  (d)   The aggregate amount of Class B
                        Investor Charge Offset forth in
                        5(c) above per $1,000 of original
                        certificate principal amount.......... $             0.00
                                                                -----------------

                  (e)   The aggregate amount of Collateral
                        Charge Offs for the related Monthly
                        Period................................ $             0.00
                                                                -----------------

                  (f)   The aggregate amount of Collateral
                        Charge Offs set forth in 5(e) above
                        per $1,000 of original certificate
                        principal amount...................... $             0.00
                                                                -----------------

                  (g)   The aggregate amount of Class A
                        Investor Charge Offs reimbursed on
                        the Transfer Date immediately
                        preceding this Distribution Date ..... $             0.00
                                                                -----------------

                  (h)   The aggregate amount of Class A
                        Investor Charge Offs set forth in 5(g)
                        above per $1,000 original certificate
                        principal amount reimbursed on the
                        Transfer Date immediately preceding
                        this Distribution Date................ $             0.00
                                                                -----------------

                   (i)  The aggregate amount of Class B
                        Investor Charge Offs reimbursed on
                        the Transfer Date immediately
                        preceding this Distribution Date ..... $             0.00
                                                                -----------------

                  (j)   The aggregate amount of Class B
                        Investor Charge Offs set forth in 5(i)
                        above per $1,000 original certificate
                        principal amount reimbursed on the
                        Transfer Date immediately preceding
                        this Distribution Date................ $             0.00
                                                                -----------------

                  (k)   The aggregate amount of Collateral
                        Charge Offs reimbursed on the
                        Transfer Date immediately preceding
                        this Distribution Date................ $             0.00
                                                                -----------------

                  (l)   The aggregate amount of Collateral
                        Charge Offs set forth in 5(k) above
                        per $1,000 original certificate
                        principal amount reimbursed on the
                        Transfer Date immediately preceding
                        Distribution Date..................... $             0.00
                                                                -----------------
</TABLE>


                                      C-5
<PAGE>   6
<TABLE>
<S>                                                            <C>
             6.   Investor Servicing Fee

                  (a)   The amount of the Class A Servicing
                        Fee payable by the Trust to the
                        Servicer for the related Monthly
                        Period................................ $       356,250.00
                                                                -----------------

                  (b)   The amount of the Class B Servicing
                        Fee payable by the Trust to the
                        Servicer for the related Monthly
                        Period................................ $        27,083.33
                                                                -----------------

                  (c)   The amount of the Collateral
                        Servicing Fee payable by the Trust
                        to the Servicer for the related
                        Monthly Period........................ $        33,333.34
                                                                -----------------

                  (d)   The amount of Servicer Interchange
                        payable by the Trust to the
                        Servicer for the related Monthly
                        Period................................ $       416,666.67
                                                                -----------------


             7.   Reallocations

                  (a)   The amount of Reallocated
                        Collateral Principal Collections
                        with respect to this Distribution
                        Date.................................. $             0.00
                                                                -----------------

                  (b)   The amount of Reallocated Class B
                        Principal Collections with respect
                        to this Distribution Date............. $             0.00
                                                                -----------------

                  (c)   The Collateral Interest as of the
                        close of business on this
                        Distribution Date..................... $    40,000,000.00
                                                                -----------------

                  (d)   The Class B Investor Interest as of
                        the close of business on this
                        Distribution Date..................... $    32,500,000.00
                                                                -----------------

             8.   Collection of Finance Charge Receivables

                  (a)   The aggregate amount of Collections of
                        Finance Charge Receivables processed
                        during the related Monthly Period
                        which were allocated in respect of the
                        Class A Certificates.................. $     6,557,845.18
                                                                -----------------
</TABLE>


                                      C-6
<PAGE>   7
<TABLE>
<S>                                                            <C>
                  (b)   The aggregate amount of Collections of
                        Finance Charge Receivables processed
                        during the related Monthly Period
                        which were allocated in respect of the
                        Class B Certificates.................. $       498,549.62
                                                                -----------------

                  (c)   The aggregate amount of Collections of
                        Finance Charge Receivables processed
                        during the related Monthly Period
                        which were allocated in respect of the
                        Collateral Interest................... $       613,599.57
                                                                -----------------

            9.    Principal Funding Account

                  (a)   The principal amount on deposit in
                        the Principal Funding Account on
                        the related Transfer Date............. $             0.00
                                                                -----------------

                  (b)   The Accumulation Shortfall with
                        respect to the related Monthly
                        Period................................ $             0.00
                                                                -----------------

                  (c)   The Principal Funding Investment
                        Proceeds deposited in the Finance
                        Charge Account on the related
                        Transfer Date......................... $             0.00
                                                                -----------------

                  (d)   The Principal Funding Investment
                        Shortfall............................. $             0.00
                                                                -----------------

                  (e)   The amount of all or the portion of
                        the Reserve Draw Amount deposited
                        in the Finance Charge Account on
                        the related Transfer Date from the
                        Reserve Account....................... $             0.00
                                                                -----------------

            10.   Reserve Draw Amount......................... $             0.00
                                                                -----------------


            11.   Available Funds

                  (a)   The amount of Class A Available
                        Funds on deposit in the Finance
                        Charge Account on the related
                        Transfer Date......................... $     6,557,845.18
                                                                -----------------

                  (b)   The amount of Class B Available
                        Funds on deposit in the Finance
                        Charge Account on the related
                        Transfer Date......................... $       498,549.62
                                                                -----------------
</TABLE>


                                      C-7
<PAGE>   8
<TABLE>
<S>                                                                                  <C>  
                  (c)      The amount of Collateral Available Funds on deposit
                           in the Finance Charge Account on the related
                           Transfer Date..........................................   $      613,599.57
                                                                                     -----------------

         12.      Portfolio Yield

                  (a)     The Portfolio Yield (Net) for the related Monthly
                          Period...................................................           12.5468%
                                                                                     -----------------

                  (b)      The Portfolio Adjusted Yield for the related
                           Monthly Period...........................................           4.6339%
                                                                                     -----------------

C.       Floating Rate Determinations

                  1.       LIBOR for the Interest Period ending on this
                           Distribution Date........................................           5.43750%
                                                                                     ------------------
</TABLE>







                            BANK OF AMERICA NATIONAL
                                   ASSOCIATION
                                   TRANSFEROR AND SERVICER


                               By:  /s/ MARGARET A. SPRUDE
                                    ---------------------------------------
                                    Name:  Margaret A. Sprude
                                    Title: SVP & Chief Financial Officer



                                      C-8

<PAGE>   1


                                                                         EX-20.3


               AMENDED SCHEDULE TO MONTHLY SERVICER'S CERTIFICATE
                      MONTHLY PERIOD ENDING MARCH 31, 1997
                      BANK OF AMERICA NATIONAL ASSOCIATION
                    BA MASTER CREDIT CARD TRUST SERIES 1996-A


<TABLE>
<S>                                                                          <C>                                          
  1.      The aggregate amount of the Investor Percentage of Collections
          of Principal Receivables........................................   $            60,108,090.94  
                                                                              -------------------------  
                                                                                                         
  2.      The aggregate amount of the Investor Percentage of Collections                                 
          of Finance Charge Receivables (excluding Interchange)...........   $             7,434,985.09  
                                                                              -------------------------  
                                                                                                         
  3.      The aggregate amount of the Investor Percentage of Interchange..   $               651,675.95  
                                                                              -------------------------  
                                                                                                         
  4.      The aggregate amount of Servicer Interchange....................   $               416,666.67  
                                                                              -------------------------  
                                                                                                         
  5.      The aggregate amount of funds on deposit in Finance Charge                                     
          Account allocable to the Series 1996-A   Certificates...........   $             7,669,994.37  
                                                                              -------------------------  
                                                                                                         
  6.      The aggregate amount of funds on deposit in the Principal                                      
          Account allocable to the Series 1996-A  Certificates............   $            60,108,090.94  
                                                                              -------------------------  
                                                                                                         
  7.      The aggregate amount of funds on deposit in the Principal                                      
          Funding Account allocable to the Series 1996-A Certificates.....   $                     0.00  
                                                                              -------------------------  
                                                                                                         
  8.      The aggregate amount to be withdrawn from the Finance Charge                                   
          Account and paid in accordance with the Loan Agreement                                         
          pursuant to Section 4.11........................................   $                     0.00  
                                                                              -------------------------  
                                                                                                         
  9.      The excess, if any, of the Required Collateral Interest over                                   
          the Collateral Interest.........................................   $                     0.00  
                                                                              -------------------------  
                                                                                                         
 10.      The Collateral Interest on the Transfer Date of the current                                    
          calendar month, after giving effect to the deposits and                                        
          withdrawals specified above, is equal to........................   $            40,000,000.00  
                                                                              -------------------------  
                                                                                                         
 11.      The amount of Monthly Interest, Deficiency Amounts and                                         
          Additional Interest payable to the                                                             
          (i)      Class A Certificateholders.............................   $             1,917,307.81  
                                                                              -------------------------  
</TABLE>
                                                                             


                                      S-1


<PAGE>   2

<TABLE>
<S>                                                                          <C>                      
          (ii)     Class B Certificateholders.............................   $              149,949.13
                                                                              ------------------------
                                                                                                      
          (iii)    Collateral Interest Holder.............................   $              188,097.22
                                                                              ------------------------
                                                                                                      
12.       The amount of principal payable to the                                                      
         (i)      Class A Certificateholders.............................    $                    0.00
                                                                             -------------------------
                                                                                                      
         (ii)     Class B Certificateholders.............................    $                    0.00
                                                                             -------------------------
                                                                                                      
         (iii)    Collateral Interest Holder.............................    $                    0.00
                                                                             -------------------------
                                                                                                      
13.      The sum of all amounts payable to the                                                        
         (i)      Class A Certificateholders.............................    $            1,917,307.81
                                                                             -------------------------
                                                                                                      
         (ii)     Class B Certificateholders ............................    $              149,949.13
                                                                             -------------------------
                                                                                                      
         (iii)    Collateral Interest Holder............................     $              188,097.22
                                                                             -------------------------
</TABLE>
                                                                             
14.      To the knowledge of the undersigned, no Series
         1996-A Pay Out Event or Trust Pay Out Event has
         occurred except as described below:

                  None







        IN WITNESS WHEREOF, the undersigned has duly executed
 and delivered this Certificate this 28th of MAY, 1997.


                                   BANK OF AMERICA NATIONAL
                                   ASSOCIATION
                                   TRANSFEROR AND SERVICER


                                By:  /s/ MARGARET A. SPRUDE
                                     ----------------------
                                     Name: Margaret A. Sprude
                                     Title:   SVP & Chief Financial Officer



                                      S-2

<PAGE>   1


                                                                         EX-20.4

                     AMENDED MONTHLY SERVICER'S CERTIFICATE
                      (This represents Series 1996-A only)

                      Monthly Period Ending MARCH 31, 1997
                      Bank of America National Association
                -------------------------------------------------

                           BA MASTER CREDIT CARD TRUST
                -------------------------------------------------


                  1. Capitalized terms used in this Certificate have their
respective meanings set forth in the Pooling and Servicing Agreement; provided,
that the "preceding Monthly Period" shall mean the Monthly Period immediately
preceding the calendar month in which this Certificate is delivered. This
Certificate is delivered pursuant to subsection 3.04 (b) of the Pooling and
Servicing Agreement. References herein to certain sections and subsections are
references to the respective sections and subsections of the Pooling and
Servicing Agreement.

                  2. Bank of America National Association is Servicer under the
Pooling and Servicing Agreement.

                  3. The undersigned is a Servicing Officer.

                  4. The date of this Certificate is a Determination Date under
the Pooling and Servicing Agreement.

<TABLE>
<S>                                                                                               <C> 
                  5.  The aggregate amount of Collections
                      processed during the Monthly Period
                      was equal to (excluding Annual
                      Membership Fees and Interchange)..........................                  $ 517,867,653.12
                                                                                                  ----------------

                  6.  The Aggregate Investor Percentage of Receivables processed by
                      Servicer during the preceding Monthly Period was equal
                      to........................................................                  $  64,771,759.05
                                                                                                  ---------------- 
                  7.  The Aggregate Investor Percentage of
                      Collections of Finance Charge
                      Receivables processed by the Servicer
                      during the preceding Monthly Period
                      was equal to (excluding Annual
                      Membership Fees and Interchange)..........................                  $   7,239,855.37
                                                                                                  ----------------

                  8.  The aggregate amount of Receivables
                      processed by the Servicer as of the
                      end of the last day of the preceding
                      Monthly Period............................................                  $ 498,520,403.99
                                                                                                  ----------------  

                  9.  Of the balance on deposit in the Finance Charge Account, the
                      amount attributable to the Aggregate Investor Percentage of
                      Collections processed by the Servicer during the preceding Monthly
                      Period ...................................................                  $   8,086,661.04
                                                                                                  ----------------
</TABLE>


                                          C-1
<PAGE>   2

 
<TABLE>
<S>                                                                                               <C>
                  10. Of the balance on deposit in the Principal Account, the amount
                      attributable to the Aggregate Investor Percentage of Collections
                      processed by the Servicer during the preceding Monthly
                      Period....................................................                  $  60,108,090.94
                                                                                                  ---------------- 

                  11. The aggregate amount, if any, of withdrawals, drawings or payments
                      under any Credit Enhancement, if any, required to be made with
                      respect to any Series outstanding for the preceding Monthly
                      Period....................................................                  $           0.00
                                                                                                  ----------------
                  12. The Aggregate Investor Percentage of Collections of Principal
                      Receivables processed by the Servicer during the related Monthly
                      Period is equal to........................................                  $  60,108,090.94
                                                                                                  ----------------
                  13. The amount equal to the Aggregate Investor Percentage of Annual
                      Membership Fees deposited to the Finance Charge Account or any
                      Series Account on or before the Transfer Date during the current
                      month is equal to.........................................                  $     195,129.72
                                                                                                  ----------------   

                  14. The aggregate amount of Interchange to be deposited in the Finance
                      Charge Account on the Transfer Date of the current month is equal
                      to........................................................                  $     651,675.95
                                                                                                  ----------------  

                  15. The aggregate amount of all sums payable to the Investor
                      Certificateholder of each Series on the succeeding Distribution
                      Date with respect to Certificate Principal................                  $           0.00 
                                                                                                  ----------------
                  16. The aggregate amount of all sums payable to the Investor
                      Certificateholder of each Series on the succeeding Distribution
                      Date with respect to Certificate Interest.................                  $   2,255,354.16
                                                                                                  ----------------
                  17. The aggregate amount of Default Amounts processed by the Servicer
                      as of the end of the last day of the preceding Monthly
                      Period....................................................                  $  22,003,102.21 
                                                                                                  ----------------
                  18. To the knowledge of the undersigned, there are no Liens on any
                      Receivables in the Trust except as described below:

                                                       None
</TABLE>



                                          C-2
<PAGE>   3


                  IN WITNESS WHEREOF, the undersigned has duly executed and
delivered this certificate this 28th day of MAY, 1997.

                              BANK OF AMERICA NATIONAL ASSOCIATION
                              Transferor and Servicer

                              By:  /s/ MARGARET A. SPRUDE
                                   ---------------------------------------
                                   Name:  Margaret A. Sprude
                                   Title:    SVP & Chief Financial Officer





                                      C-3


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