Regulations last checked for updates: Feb 06, 2026

Title 40 - Protection of Environment last revised: Dec 22, 2026
§ 52.1340 - Control strategy: Carbon monoxide.

Approval—A maintenance plan and redesignation request for the St. Louis, Missouri, area was submitted by the Director of the Missouri Department of Natural Resources on June 13, 1997. Additional information was received on June 15, 1998. The maintenance plan and redesignation request satisfy all applicable requirements of the Clean Air Act.

[64 FR 3859, Jan. 26, 1999]
authority: 42 U.S.C. 7401
cite as: 40 CFR 52.1340