The following symbols, acronyms, and abbreviations apply to this part:

$ U.S. dollars. CFR Code of Federal Regulations.disp engine displacement. EPA Environmental Protection Agency.kW kilowatt. L/cyl liters per cylinder. NARA National Archives and Records Administration. NOX Oxides of nitrogen. SAE Society of Automotive Engineers. SEA selective enforcement audit. U.S. United States. U.S.C. United States Code.