US lawFederal (United States)RegulationsTitle 40 CFR — Protection of EnvironmentChapter I — ENVIRONMENTAL PROTECTION AGENCYPart 52 — APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANSSubpart MM — Oregon52.197240 C.F.R. § 52.1972Approval status.Last amended: 2022Year: 2026Length: 36 wordsOfficial source Cite as 40 C.F.R. § 52.1972 (2026)With the exceptions set forth in this subpart, the Administrator approves Oregon's plan for the attainment and maintenance of the national standards under section 110 of the Clean Air Act. [65 FR 29958, May 10, 2000]Previous40 C.F.R. § 52.1971Next40 C.F.R. § 52.1974