under applicable authority that replaces or repeals that provision. (b) Modification prohibited The Secretary of the Army and the Administrator of the Environmental Protection Agency may not modify the final rule described in subsection (a) during the 15-year period that begins on the date of enactment of this Act. 503. Methane rule (a) Reinstatement Notwithstanding Public Law 117–23 (135 Stat. 295), the final rule of the Environmental Protection Agency entitled Oil and Natural Gas Sector: Emission Standards for New, Reconstructed, and Modified Sources Review (85 Fed. Reg. 57018 (September 14, 2020)) is hereby reinstated, and each of its provisions shall apply unless and until the effective date of a subsequent final rule promulgated, subject to subsection (b), under applicable authority that replaces or repeals that provision. (b) Modification prohibited The Administrator of the Environmental Protection Agency may not modify the final rule described in subsection (a) during the 15-year period that begins on the date of enactment of this Act. 504. ONRR 2020 Valuation Reform and Civil Penalty Rule (a) Reinstatement The final rule of the Office of Natural Resources Revenue of the Department of the Interior entitled ONRR 2020 Valuation Reform and Civil Penalty Rule (86 Fed. Reg. 4612 (January 15, 2021)) is hereby reinstated, and each of its provisions shall apply unless and until the effective date of a subsequent final rule promulgated, subject to subsection (b), under applicable authority that replaces or repeals that provision. (b) Modification prohibited The Secretary and the Director of the Office of Natural Resources Revenue may not modify the final rule described in subsection (a) during the 15-year period that begins on the date of enactment of this Act. 505. NEPA rule (a) Reinstatement The final rule of the Council on Environmental Quality entitled Update to the Regulations Implementing the Procedural Provisions of the National Environmental Policy Act (85 Fed. Reg. 43304 (July 16, 2020)) is hereby