{"data":{"id":"us/40-cfr-51.261","jurisdiction":"us","citation":"40 CFR 51.261","heading":"Final compliance schedules.","body":"(a) Unless EPA grants an extension under subpart R, compliance schedules designed to provide for attainment of a primary standard must—\n(1) Provide for compliance with the applicable plan requirements as soon as practicable; or\n(2) Provide for compliance no later than the date specified for attainment of the primary standard under;\n(b) Unless EPA grants an extension under subpart R, compliance schedules designed to provide for attainment of a secondary standard must—\n(1) Provide for compliance with the applicable plan requirements in a reasonable time; or\n(2) Provide for compliance no later than the date specified for the attainment of the secondary standard under § 51.110(c).","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 51—REQUIREMENTS FOR PREPARATION, ADOPTION, AND SUBMITTAL OF IMPLEMENTATION PLANS","Subpart N—Compliance Schedules"],"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":"f4c2a483244482060aa3a8da93a9e9101c9855967218ffe1016d9c9b5b3be022","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-51.260","next":"us/40-cfr-51.262"},"notice":"GroundRules: Original legal text. Not legal advice."}