Regulations last checked for updates: Sep 29, 2023

Title 40 - Protection of Environment last revised: Sep 27, 2023
  • Subpart B - Subparts B–E [Reserved]
authority: 23 U.S.C. 101; 42 U.S.C. 7401–7671q
source: 36 FR 22398, Nov. 25, 1971, unless otherwise noted.