; or supply services the Secretary has determined shall be provided through the Fund, and for the operational expenses of the Fund: Provided , That amounts from the Fund shall not be available to provide services not specifically authorized under this heading: Provided further , That upon a determination by the Secretary that any other service (or portion thereof) authorized under this heading shall be provided through the Fund, amounts made available under this title for salaries and expenses under the headings Executive Offices , Administrative Support Offices , Program Offices , and Government National Mortgage Association , for such services shall be transferred to the Fund, to remain available until expended: Provided further , That the Secretary shall notify the House and Senate Committees on Appropriations of its plans for executing such transfers at least 15 days in advance of such transfers: Provided further , That the Secretary may transfer not to exceed an additional $10,000,000, in aggregate, from all such appropriations, to be merged with the Fund and to remain available until expended for any purpose under this heading. Public and indian housing Tenant-based rental assistance For activities and assistance for the provision of tenant-based rental assistance authorized under the United States Housing Act of 1937, as amended ( 42 U.S.C. 1437 et seq.) (in this title the Act ), not otherwise provided for, $21,739,312,000, to remain available until expended, which shall be available on October 1, 2020 (in addition to the $4,000,000,000 previously appropriated under this heading that shall be available on October 1, 2020), and $4,000,000,000, to remain available until expended, which shall be available on October 1, 2021: Provided , That the amounts made available under this heading are provided as follows— (1) $22,852,000,000 shall be for renewals of expiring section 8 tenant-based annual contributions contracts (including renewals of enhanced vouchers under any provision of law authorizing such