Exhibit 99.1 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the amended Quarterly Report of Polaris Income Fund III (the "Partnership") on Form 10-Q/A for the period ended June 30, 2002 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, William R. Carpenter, President of Polaris Investment Management Corporation, the General Partner of the Partnership, certify, pursuant to 18 U.S.C. ss. 1350, as adopted pursuant to ss. 906 of the Sarbanes-Oxley Act of 2002, that: (1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and (2) The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Partnership. POLARIS AIRCRAFT INCOME FUND III A California Limited Partnership (Registrant) By: Polaris Investment Management Corporation General Partner By: /s/ William R. Carpenter ------------------------ William R. Carpenter President December 9, 2002