{"data":{"id":"us/49-cfr-531.1","jurisdiction":"us","citation":"49 CFR 531.1","heading":"Scope.","body":"This part establishes average fuel economy standards pursuant to 49 U.S.C. 32902 for passenger automobiles.","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER V—NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","PART 531—PASSENGER AUTOMOBILE AVERAGE FUEL ECONOMY STANDARDS"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-49.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:34Z","sha256":"84227af082e00c505200faa869345f8d45b1a73c251c76aee72aeb7fe7552a8f","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-529.6","next":"us/49-cfr-531.2"},"notice":"GroundRules: Original legal text. Not legal advice."}