{"data":{"id":"us/40-cfr-52.1387","jurisdiction":"us","citation":"40 CFR 52.1387","heading":"Visibility protection.","body":"(a) The requirements of section 169A of the Clean Air Act are not met because the plan does not include approvable procedures for protection of visibility in mandatory Class I Federal areas.\n(b) [Reserved]\n(c) Montana's November 7, 2017 Progress Report meets the applicable regional haze requirements set forth in § 51.308(g) and (h).","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 52—APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS","Subpart BB—Montana"],"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":"23666535355eaeabe5a9fc59b042713ccdcfac9231e88e6a6dcd9141474089b7","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-52.1385-52.1386","next":"us/40-cfr-52.1388"},"notice":"GroundRules: Original legal text. Not legal advice."}