{"data":{"id":"us/40-cfr-51.902","jurisdiction":"us","citation":"40 CFR 51.902","heading":"Which classification and nonattainment area planning provisions of the CAA shall apply to areas designated nonattainment for the 1997 8-hour NAAQS?","body":"(a) An area designated nonattainment for the 1997 8-hour NAAQS will be classified in accordance with section 181 of the CAA, as interpreted in § 51.903(a), for purposes of the 1997 8-hour NAAQS, and will be subject to the requirements of subpart 2 that apply for that classification.\n(b) [Reserved]","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 X—Provisions for Implementation of 8-hour Ozone National Ambient Air Quality Standard"],"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":"cc6030eb7d770369ca999740ca48452a1246bb97afda5163a4455ff4ac6d4a0b","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-51.901","next":"us/40-cfr-51.903"},"notice":"GroundRules: Original legal text. Not legal advice."}