{"data":{"id":"us/40-cfr-1033.905","jurisdiction":"us","citation":"40 CFR 1033.905","heading":"Symbols, acronyms, and abbreviations.","body":"The following symbols, acronyms, and abbreviations apply to this part:\nABT averaging, banking, and trading.\nAECD auxiliary emission control device.\nAESS automatic engine stop/start\nAF adjustment factor (see § 1033.530).\nCFR Code of Federal Regulations.\nCH4 methane.\nCO carbon monoxide.\nCO2 carbon dioxide.\nEPA Environmental Protection Agency.\nFEL Family Emission Limit.\ng/bhp-hr grams per brake horsepower-hour.\nHC hydrocarbon.\nhp horsepower.\nLPG liquefied petroleum gas.\nLSD low sulfur diesel.\nMW megawatt.\nN2O nitrous oxide.\nNIST National Institute of Standards and Technology.\nNMHC nonmethane hydrocarbons.\nNOX oxides of nitrogen.\nPM particulate matter.\nrpm revolutions per minute.\nSAE Society of Automotive Engineers.\nSCR selective catalytic reduction.\nSEA Selective Enforcement Audit.\nTHC total hydrocarbon.\nTHCE total hydrocarbon equivalent.\nUL useful life.\nULSD ultra low sulfur diesel.\nU.S. United States.\nU.S.C. United States Code.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER U—AIR POLLUTION CONTROLS","PART 1033—CONTROL OF EMISSIONS FROM LOCOMOTIVES","Subpart J—Definitions and Other Reference Information"],"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":"6062a74c5976439a49c26efa311a54020c884a36634c5e216fbd8ab68c6dd119","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-1033.901","next":"us/40-cfr-1033.915"},"notice":"GroundRules: Original legal text. Not legal advice."}