(a) Carbon Monoxide. (1) EPA approves as a revision to the Idaho State Implementation Plan, the Limited Maintenance Plan for the Northern Ada County Carbon Monoxide Not- Classified Nonattainment Area, submitted by the State on January 17, 2002.
CFR 40-52.672-2014 history
2014CFR 40-52.672-2014 Protection of Environment. Part52:Approval and promulgation of implementation plans. Section52.672:Approval of plans.