“Beginning October 1, 1991, and thereafter, amounts collected by the Secretary in connection with the Alaska Resupply Program (Public Law 77–457) [48 U.S.C. 50e] shall be deposited into a special fund to be established in the Treasury, to be available to carry out the provisions of the Alaska Resupply Program, such amounts to remain available until expended: Provided, That unobligated balances of amounts collected in fiscal year 1991 and credited to the Operation of Indian Programs account as offsetting collections, shall be transferred and credited to this account.”