{"data":{"id":"us/40-cfr-81.423","jurisdiction":"us","citation":"40 CFR 81.423","heading":"North Dakota.","body":"Area name Acreage Public Law establishing Federal land manager\nLostwood Wild 5,557 93-632 USDI-FWS.\nTheodore Roosevelt, NP 69,675 80-38 USDI-NPS.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 81—DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES","Subpart D—Identification of Mandatory Class I Federal Areas Where Visibility Is an Important Value"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"eabad8d25c436e39e5d3ec9ee49e62d40c5612b7e8bf4ec3d051c5e4fcda249d","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-81.422","next":"us/40-cfr-81.424"},"notice":"GroundRules: Original legal text. Not legal advice."}