; and (D) services specified under subsection (a)(3). (c) Prohibition on use of amounts None of the amounts made available under this section may be used for the purpose of conducting— (1) lobbying activities; or (2) legal challenges of final decisions of the Department of Defense. C Treatment of Perfluoroalkyl Substances and Polyfluoroalkyl Substances 321. Treatment of certain materials contaminated with perfluoroalkyl substances or polyfluoroalkyl substances (a) In general The Secretary of Defense may treat covered materials, including soils that have been contaminated with PFAS, until the date on which the Secretary adopts the final rule required under section 343(b) of the National Defense Authorization Act for Fiscal Year 2022 ( Public Law 117–81 ; 10 U.S.C. 2701 note) if the treatment of such materials occurs through the use of remediation or disposal technology approved by the relevant Federal regulatory agency. (b) Definitions In this section, the terms covered material and PFAS have the meanings given those terms in section 343(e) of the National Defense Authorization Act for Fiscal Year 2022 ( Public Law 117–81 ; 10 U.S.C. 2701 note). 322. Increase of transfer authority for funding of study and assessment on health implications of per- and polyfluoroalkyl substances contamination in drinking water by Agency for Toxic Substances and Disease Registry Section 316(a)(2)(B) of the National Defense Authorization Act for Fiscal Year 2018 ( Public Law 115–91 ; 131 Stat. 1350), as amended by section 315(a) of the John S. McCain National Defense Authorization Act for Fiscal Year 2019 ( Public Law 115–232 ; 132 Stat. 1713), section 321 of the National Defense Authorization Act for Fiscal Year 2020 ( Public Law 116–92 ; 133 Stat. 1307), section 337 of the William M. (Mac) Thornberry National Defense Authorization Act for Fiscal Year 2021 ( Public Law 116–283 ; 134 Stat. 3533), section 342 of the National Defense Authorization Act for Fiscal Year 2022 ( Public Law 117–81