{"data":{"id":"us/40-cfr-1037.550","jurisdiction":"us","citation":"40 CFR 1037.550","heading":"Powertrain testing.","body":"See 40 CFR 1036.545 for the powertrain test procedure.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER U—AIR POLLUTION CONTROLS","PART 1037—CONTROL OF EMISSIONS FROM NEW HEAVY-DUTY MOTOR VEHICLES","Subpart F—Test and Modeling Procedures"],"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":"eee59f34715d6aa89615641a273bf331baaccbcb9c176efe52215febca7c45fc","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-1037.540","next":"us/40-cfr-1037.551"},"notice":"GroundRules: Original legal text. Not legal advice."}