§ 52.1373 Control strategy: Carbon monoxide.

(a) On July 8, 1997, the Governor of Montana submitted revisions to the SIP narrative for the Missoula carbon monoxide control plan.

(b) Revisions to the Montana State Implementation Plan, revised Carbon Monoxide Maintenance Plan for Billings, as submitted by the Governor's Designee on July 13, 2011, and the associated Alternative Monitoring Strategy for Billings, as submitted by the Governor's Designee on June 22, 2012.