As filed pursuant to Rule 424(b)(3)
                                                under the Securities Act of 1933
                                                     Registration No. 333-103504

                      AIG SUNAMERICA LIFE ASSURANCE COMPANY

                            VARIABLE SEPARATE ACCOUNT

  SUPPLEMENT TO THE WM DIVERSIFIED STRATEGIES AND WM DIVERSIFIED STRATEGIES III
                                  PROSPECTUSES
                                DATED MAY 1, 2003

THE WM REIT FUND IS NOT CURRENTLY AVAILABLE FOR INVESTMENT. PLEASE CHECK WITH
YOUR FINANCIAL REPRESENTATIVE OR THE ANNUITY SERVICE CENTER FOR THE VARIABLE
PORTFOLIO'S AVAILABILITY DATE.

THE FOLLOWING REPLACES THE FOOTNOTE TO THE WM REIT FUND IN THE INVESTMENT
OPTIONS SECTION OF THE PROSPECTUS:

      *This Variable Portfolio is not currently available for investment. Please
      check with your financial representative or the Annuity Service Center for
      the Variable Portfolio's availability date.

Date: May 30, 2003

               Please keep this Supplement with your Prospectus.