{"data":{"id":"us/49-cfr-535.2","jurisdiction":"us","citation":"49 CFR 535.2","heading":"Purpose.","body":"The purpose of this part is to reduce the fuel consumption of new heavy-duty vehicles and engines by establishing maximum levels for fuel consumption standards while providing a flexible credit program to assist manufacturers in complying with standards.","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER V—NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","PART 535—MEDIUM- AND HEAVY-DUTY VEHICLE FUEL EFFICIENCY PROGRAM"],"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":"c59323b7b011a045b3ff66a2ca9ff7ff10808a3615874239f887cdb2c2fc1399","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-535.1","next":"us/49-cfr-535.3"},"notice":"GroundRules: Original legal text. Not legal advice."}