; (D) section 811 of the Cranston-Gonzalez National Affordable Housing Act ( 42 U.S.C. 8013 ); or (E) section 236 of the National Housing Act ( 12 U.S.C. 1715z–1 ); and (2) the term necessary physical improvements means new construction or capital improvements to an existing multifamily housing project that the Secretary determines are necessary to address the deficiencies or that rise to such a level that delaying physical improvements to the project would be detrimental to the longevity of the project as suitable housing for occupancy. (d) Implementation The Secretary shall have the authority to issue such regulations, notices, or other guidance, forms, instructions, and publications to carry out the programs, projects, or activities authorized under this section to ensure that such programs, projects, or activities are completed in a timely and effective manner. 108. Investments in rural rental housing (a) Appropriation In addition to amounts otherwise available, there is appropriated to the Rural Housing Service of the Department of Agriculture for fiscal year 2024, out of any money in the Treasury not otherwise appropriated— (1) $1,800,000,000, to remain available until September 30, 2031, for the Administrator of the Rural Housing Service for making loans and grants for new construction, improvements to energy and water efficiency or climate resilience, the removal of health and safety hazards, and the preservation and revitalization of housing for other purposes described under section 514 of the Housing Act of 1949 ( 42 U.S.C. 1484 ), subsections (a)(1) through (a)(2), (b)(1) through (b)(3), (b)(5) through (aa)(2)(A), and (aa)(4) of section 515 of such Act ( 42 U.S.C. 1485(a)(1) –42 U.S.C. 1485(a)(2), 42 U.S.C. 1485(b)(1) –(b)(3), 42 U.S.C. 1485(b)(5) – 42 U.S.C. 1485(aa)(2)(A) , 42 U.S.C. 1485(aa)(4) ), and 516 of such act ( 42 U.S.C. 1486 ), subject to the terms and conditions in subsection (b)