424B3 1 v0370577e424b3.txt PROSPECTUS As filed pursuant to Rule 424(b)(3) under the Securities Act of 1933 Registration No. 33-87864 AIG SUNAMERICA LIFE ASSURANCE COMPANY -------------------------------------------------------------------------------- VARIABLE SEPARATE ACCOUNT SUPPLEMENT TO THE WM DIVERSIFIED STRATEGIES VARIABLE ANNUITY (B-2652-PRO) DATED MAY 3, 2004 -------------------------------------------------------------------------------- The following replaces the INVESTMENT CHARGES section located on page 31 of the prospectus: INVESTMENT CHARGES INVESTMENT MANAGEMENT FEES Charges are deducted from your Variable Portfolios for the advisory and other expenses of the Variable Portfolios. The Fee Tables illustrate these charges and expenses. For more detailed information on these investment charges, refer to the accompanying prospectuses for the Trusts. 12B-1 FEES Shares of certain trusts may be subject to fees imposed under a distribution and/or servicing plan adopted pursuant to Rule 12b-1 under the Investment Company Act of 1940. The 0.15% fee applicable to Class 3 shares of the Anchor Series Trust and SunAmerica Series Trust is generally used to pay financial intermediaries for services provided over the life of your contract. For more detailed information on these Investment Charges, refer to the prospectuses for the underlying portfolios. DATE: December 30, 2004 Please keep this Supplement with your Prospectus Page 1 of 1