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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
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Title 40
Chapter I
Part 85
Subpart X - Subpart X—Determination of Model Year for Motor Vehicles and Engines Used in Motor Vehicles Under Section 177 and Part A of Title II of the Clean Air Act
§ 85.2301 - Applicability.
§ 85.2302 - Definition of model year.
§ 85.2303 - Duration of model year.
§ 85.2304 - Definition of production period.
§ 85.2305 - Duration and applicability of certificates of conformity.
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