housing related hazards, including carbon monoxide, radon, or mold: Provided further, That in administering funds appropriated or otherwise made available under this heading in this title, the Secretary may waive or specify alternative requirements for any provision of any statute or regulation in connection with the obligation by the Secretary or the use of these funds (except for requirements related to fair housing, nondiscrimination, labor standards, and the environment), upon a finding that such a waiver is necessary to expedite or facilitate the use of such funds: Provided further, That up to 0.5 percent of the amounts made available under this heading in this title may be transferred, in aggregate, to Department of Housing and Urban Development, Program Offices—Public and Indian Housing to supplement existing resources for the necessary costs of administering and overseeing the obligation and expenditure of these amounts, to remain available until September 30, 2024: Provided further, That such amount is designated by the Congress as being for an emergency requirement pursuant to section 251(b)(2)(A)(i) of the Balanced Budget and Emergency Deficit Control Act of 1985. Choice neighborhoods initiative (including transfer of funds) For an additional amount for the Choice Neighborhoods Initiative , $300,000,000, to remain available until September 30, 2022: Provided, That such additional amount shall be subject to the provisions under this heading in title II of this Act, except as modified by this heading in this title: Provided further, That not less than 10 percent of the amounts made available under this heading in this title shall be used for activities that improve water and energy efficiency, or reduce the risk of harm to occupants or property from natural hazards: Provided further, That all construction, rehabilitation, and related activities funded under this heading in this title shall comply with the latest published editions of relevant national consensus-based codes and specifications and