{"data":{"id":"us/40-cfr-61.17","jurisdiction":"us","citation":"40 CFR 61.17","heading":"State authority.","body":"(a) This part shall not be construed to preclude any State or political subdivision thereof from—\n(1) Adopting and enforcing any emission limiting regulation applicable to a stationary source, provided that such emission limiting regulation is not less stringent than the standards prescribed under this part; or\n(2) Requiring the owner or operator of a stationary source to obtain permits, licenses, or approvals prior to initiating construction, modification, or operation of the source.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 61—NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS","Subpart A—General Provisions"],"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":"fb89b05319ae8f0b9cb897bb4e9ed806a9e15225525bcacbe9065b8cffe9b770","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-61.16","next":"us/40-cfr-61.18"},"notice":"GroundRules: Original legal text. Not legal advice."}