{"data":{"id":"us/49-cfr-531.3","jurisdiction":"us","citation":"49 CFR 531.3","heading":"Applicability.","body":"This part applies to manufacturers of 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":"92764507016eba14f712d8eda6ac1761c7aa55394ad27bab8ee96656b78f158b","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-531.2","next":"us/49-cfr-531.4"},"notice":"GroundRules: Original legal text. Not legal advice."}