{"data":{"id":"us/40-cfr-81.429","jurisdiction":"us","citation":"40 CFR 81.429","heading":"Texas.","body":"Area name Acreage Public Law establishing Federal land manager\nBig Bend NP 708,118 74-157 USDI-NPS\nGuadalupe Mountains NP 76,292 89-667 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":"9b7961b451c32a68078c1bd78e63db65bcd25d9d6388eaf91bd604aac2f43672","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-81.428","next":"us/40-cfr-81.430"},"notice":"GroundRules: Original legal text. Not legal advice."}