Regulations last checked for updates: Sep 29, 2023

Title 40 - Protection of Environment last revised: Sep 27, 2023
authority: 42 U.S.C. 4321–4347; 42 U.S.C. 4371–4375; 42 U.S.C. 7609; E.O. 11514, 35 FR 4247, 3 CFR, 1966–1970, Comp., p. 902, as amended by E.O. 11991, 42 FR 26967, 3 CFR, 1977 Comp., p. 123; E.O. 13807, 82 FR 40463, 3 CFR, 2017, Comp., p. 369
source: 85 FR 43367, July 16, 2020, unless otherwise noted.