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Importing Vehicles and Engines into the U.S.

Regulations and Standards

This web page provides links to regulations and standards for controlling air pollution from motor vehicles, motor vehicle engines, heavy-duty on-highway engines, recreational vehicles(dirt bikes, ATVs, ORUVs, snowmobiles) and nonroad engines. The regulations can be found in title II of the Clean Air Act (Act, or CAA) and Volume 40 of the Code of Federal Regulations (CFR), 40 CFR, Parts 85, 86, 89, 90, 91, 92, 94, 1033, 1036, 1037, 1039, 1042, 1043, 1045, 1048, 1051, 1054, 1068.

This page is maintained by EPA's Office of Transportation and Air Quality (OTAQ).
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