AMENDMENT NO. [ ]

                                       TO

          AMENDED AND RESTATED MASTER ADMINISTRATIVE SERVICES AGREEMENT

      This Amendment, dated as of February 25, 2005 (the "Amendment"), amends
the Amended and Restated Master Administrative Services Agreement, as amended,
(the "Agreement"), dated July 1, 2004, by and between A I M ADVISORS, INC.,
("AIM"), a Delaware statutory trust, (the "Administrator") and AIM Treasurer's
Series Trust, a Delaware statutory trust with respect to the separate series set
forth in Appendix A to this Agreement.

                              W I T N E S S E T H:

      WHEREAS, the parties desire to amend the Agreement to reflect that
pursuant to the terms of an Investment Advisory Agreement with AIM Treasurer's
Series Trust ("ATST"), dated November 25, 2003, as amended February 23, 2005,
AIM will not charge Premier U.S. Government Money Portfolio any fees under this
Agreement;

      NOW, THEREFORE, the parties, intending to be legally bound, hereby agree
as follows;

      1.    Appendix A to the Agreement is hereby deleted in its entirety and
            replaced with the following:

                                   "APPENDIX A
                                 FEE SCHEDULE TO
          AMENDED AND RESTATED MASTER ADMINISTRATIVE SERVICES AGREEMENT
                                       OF
                          AIM TREASURER'S SERIES TRUST



                PORTFOLIOS                   EFFECTIVE DATE OF AGREEMENT
                ----------                   ---------------------------
                                          
Premier Portfolio**                                 July 1, 2004

Premier Tax-Exempt Portfolio **                     July 1, 2004

Premier U.S. Government Money Portfolio**           July 1, 2004


    The Administrator may receive from each Portfolio reimbursement for costs
or reasonable compensation for such services as follows:



  Rate*         Net Assets
  -----         ----------
          
0.023%       First $1.5 billion
0.013%       Next $1.5 billion
0.003%       Over $3 billion


Re: Consideration of Changes to the Portfolios of ATST


            *Annual minimum fee is $50,000. An additional $10,000 per class of
            shares is charged for each class other than the initial class. The
            $10,000 class fee is waived for any of the above Portfolios with
            insufficient assets to result in the payment of more than the
            minimum fee of $50,000.

**Notwithstanding the foregoing, Administrator, pursuant to the terms of an
Investment Advisory Agreement with AIM Treasurer's Series Trust ("ATST"), dated
November 25, 2003, as amended February 25, 2005, AIM will not charge Premier
Portfolio, Premier Tax-Exempt Portfolio or Premier U.S. Government Portfolio,
portfolios of ATST, any fees under this Agreement. However, this commitment may
be changed following consultation with the Trustees."

      2.    In all other respects, the Agreement is hereby confirmed and remains
            in full force and effect.

Re: Consideration of Changes to the Portfolios of ATST

                                       2


      IN WITNESS WHEREOF, the parties have caused this Amendment to be executed
by their respective officers on the date first written above.

                                          A I M ADVISORS, INC.

Attest: ___________________________       By: ________________________________
         Assistant Secretary                   Mark H. Williamson
                                               President

(SEAL)

                                          AIM TREASURER'S SERIES TRUST

Attest: ___________________________       By: ________________________________
         Assistant Secretary                   Robert H. Graham
                                               President

(SEAL)

Re: Consideration of Changes to the Portfolios of ATST

                                       3