US lawFederal (United States)RegulationsTitle 40 CFR — Protection of EnvironmentChapter I — ENVIRONMENTAL PROTECTION AGENCYPart 81 — DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSESSubpart D — Identification of Mandatory Class I Federal Areas Where Visibility Is an Important Value81.40240 C.F.R. § 81.402Alaska.Last amended: 2016Year: 2026Length: 31 wordsOfficial source Cite as 40 C.F.R. § 81.402 (2026)Area name Acreage Public Law establishing Federal land manager Bering Sea Wild 41,113 91-622 USDI-FWS Mount McKinley NP 1,949,493 64-353 USDI-NPS Simeonof Wild 25,141 94-557 USDI-FWS Tuxedni Wild 6,402 91-504 USDI-FWSPrevious40 C.F.R. § 81.401Next40 C.F.R. § 81.403