; (2) by striking subsection (c) and redesignating subsections (d), (e), and (f) as subsections (c), (d), and (e); and (3) by inserting after subsection (e), as redesignated by paragraph (2), the following new subsection: (f) Waiver of Government cost share restriction If the Secretary of Defense determines it to be in the best interests of the Federal Government, the Secretary may waive the restrictions on the percentage of eligible costs covered by the program under section (b). The Secretary shall submit to the congressional defense committees a written justification for such determination. . (c) Authority to provide certain types of technical assistance Section 4958(c) of title 10, United States Code, is amended— (1) in paragraph (1), by striking ; and and inserting a semicolon; (2) in paragraph (2), by striking the period at the end and inserting a semicolon; and (3) by adding at the end the following new paragraphs: (3) under clause 252.204–7012 of the Defense Acquisition Regulation Supplement, or any successor regulation, and on compliance with those requirements (and any successor requirements); and (4) under section 847 of the National Defense Authorization Act for Fiscal Year 2020 ( Public Law 116–92 ; 133 Stat. 1505), and on compliance with those requirements (and any such successor requirements). . 854. Modification of effective date for expansion on the prohibition on acquiring certain metal products Section 844(b) of the William M. (Mac) Thornberry National Defense Authorization Act for Fiscal Year 2021 ( Public Law 116–283 ; 134 Stat. 3766) is amended by striking 5 years and inserting 6 years . 855. Extension of pilot program for distribution support and services for weapons systems contractors Section 883 of the National Defense Authorization Act for Fiscal Year 2017 ( Public Law 114–328 ; 10 U.S.C. 4292 note prec.) is amended— (1) in subsection (a), by striking seven-year pilot program and inserting eight-year pilot program