Regulations last checked for updates: Sep 27, 2021

Title 23 - Highways last revised: Sep 20, 2021
authority: Secs.1302 and 1321, Pub. L. 112-141, 126 Stat. 405. Sec. 1307, Pub. L. 105-178, 112 Stat. 107; 23 U.S.C. 101(a), 107, 108, 111, 114, 133, 142(f), 156, 204, 210, 308, 315, 317, and 323; 42 U.S.C. 2000d
source: 64 FR 71290, Dec. 21, 1999, unless otherwise noted.