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Title 40

Displaying title 40, up to date as of 7/09/2026. Title 40 was last amended 7/09/2026.
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Title 40Protection of EnvironmentPart / Section
Chapter IEnvironmental Protection Agency1 – 1099
Subchapter CAir Programs50 – 99
Part 85Control of Air Pollution from Mobile Sources85.501 – 85.2401
Subparts A-E [Reserved]
Subpart FExemption of Clean Alternative Fuel Conversions From Tampering Prohibition85.501 – 85.535
Subparts G-O [Reserved]
Subpart PImportation of Motor Vehicles and Motor Vehicle Engines85.1501 – 85.1515
Subpart Q [Reserved]
Subpart RExclusion and Exemption of Motor Vehicles and Motor Vehicle Engines85.1701 – 85.1716
Subpart SRecall Regulations85.1801 – 85.1808
Subpart TEmission Defect Reporting Requirements85.1901 – 85.1909
Subpart U [Reserved]
Subpart VWarranty Regulations and Voluntary Aftermarket Part Certification Program85.2101 – 85.2123
Subpart WEmission Control System Performance Warranty Tests85.2201 – 85.2231
§ 85.2201Applicability.
§ 85.2207Onboard diagnostic test standards.
§ 85.2222Onboard diagnostic test procedures.
§ 85.2223Onboard diagnostic test report.
§ 85.2231Onboard diagnostic test equipment requirements.
Subpart XDetermination 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 Act85.2301 – 85.2305
Subpart YFees for the Motor Vehicle and Engine Compliance Program85.2401
§ 85.2401Assessment of fees.
Appendixes I-VII to Part 85 [Reserved]
Appendix VIII to Part 85
Vehicle and Engine Parameters and Specifications