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 Value81.40740 C.F.R. § 81.407Florida.Last amended: 2016Year: 2026Length: 25 wordsOfficial source Cite as 40 C.F.R. § 81.407 (2026)Area name Acreage Public Law establishing Federal land manager Chassahowitzka Wild 23,360 94-557 USDI-FWS Everglades NP 1,397,429 73-267 USDI-NPS St. Marks Wild 17,745 93-632 USDI-FWSPrevious40 C.F.R. § 81.406Next40 C.F.R. § 81.408