Regulations last checked for updates: Nov 21, 2024

Title 40 - Protection of Environment last revised: Nov 19, 2024
authority: Executive Order 11652 (37 FR 5209, March 10, 1972) and the National Security Directive of May 17, 1972 (37 FR 10053, May 19, 1972)
source: 37 FR 23541, Nov. 4, 1972, unless otherwise noted.