need when awarding grants: Provided further , That $5,000,000 of the amounts made available under this heading shall be for a radon testing and mitigation resident safety demonstration program (the radon demonstration) in public housing: Provided further , That the testing method, mitigation method, or action level used under the radon demonstration shall be as specified by applicable State or local law, if such law is more protective of human health or the environment than the method or level specified by the Secretary: Provided further , That $25,000,000 of the amounts made available under this heading shall be for competitive grants to public housing agencies for the installation of automatic sprinkler systems. Public housing operating fund For 2021 payments to public housing agencies for the operation and management of public housing, as authorized by section 9(e) of the United States Housing Act of 1937 ( 42 U.S.C. 1437g(e) ), $4,649,000,000, to remain available until September 30, 2022: Provided , That of the total amount made available under this heading, $25,000,000 shall be available to the Secretary to allocate pursuant to a need-based application process notwithstanding section 203 of this title and not subject to the Operating Fund formula under part 990 of title 24, Code of Federal Regulations to public housing agencies that experience financial insolvency, as determined by the Secretary: Provided further , That after all such insolvency needs are met, the Secretary may distribute any remaining funds to all public housing agencies on a pro-rata basis pursuant to the Operating Fund formula under part 990 of title 24, Code of Federal Regulations. Choice neighborhoods initiative For competitive grants under the Choice Neighborhoods Initiative (subject to section 24 of the United States Housing Act of 1937 ( 42 U.S.C. 1437v ) unless otherwise specified under this heading), for transformation, rehabilitation, and replacement housing needs of both public and HUD-assisted housing and to transform