US lawFederal (United States)RegulationsTitle 40 CFR — Protection of EnvironmentChapter I — ENVIRONMENTAL PROTECTION AGENCYPart 49 — INDIAN COUNTRY: AIR QUALITY PLANNING AND MANAGEMENTSubpart M — Implementation Plans for Tribes—Region X49.992240 C.F.R. § 49.9922Approval status.Last amended: 2016Year: 2026Length: 18 wordsOfficial source Cite as 40 C.F.R. § 49.9922 (2026)There are currently no EPA-approved Tribal rules or measures in the implementation plan for the Coeur D'Alene Reservation.Previous40 C.F.R. § 49.9921Next40 C.F.R. § 49.9925