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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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  1. Title 40 —Protection of Environment
  2. Chapter I —Environmental Protection Agency
  3. Subchapter C —Air Programs
  4. Part 86 —Control of Emissions from New and In-Use Highway Vehicles and Engines
  5. Subpart A   View Full Text
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eCFR Content

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Title 40Protection of EnvironmentPart / Section
Chapter IEnvironmental Protection Agency1 – 1099
Subchapter CAir Programs50 – 99
Part 86Control of Emissions from New and In-Use Highway Vehicles and Engines86.1 – 86.1999
Subpart AGeneral Provisions for Heavy-Duty Engines and Heavy-Duty Vehicles86.000-2 – 86.099-11
§ 86.000-2Definitions.
§ 86.000-3Abbreviations.
§ 86.000-7Maintenance of records; submittal of information; right of entry.
§ 86.000-24Test vehicles and engines.
§ 86.001-2Definitions.
§ 86.001-21Application for certification.
§ 86.001-23Required data.
§ 86.001-24Test vehicles and engines.
§ 86.004-2Definitions.
§ 86.004-11Emission standards for 2004 and later model year diesel heavy-duty engines and vehicles.
§ 86.004-15NOX plus NMHC and particulate averaging, trading, and banking for heavy-duty engines.
§ 86.004-16Prohibition of defeat devices.
§ 86.004-21Application for certification.
§ 86.004-25Maintenance.
§ 86.004-26Mileage and service accumulation; emission measurements.
§ 86.004-28Compliance with emission standards.
§ 86.004-38Maintenance instructions.
§ 86.004-40Heavy-duty engine rebuilding practices.
§ 86.005-1General applicability.
§ 86.005-10Emission standards for 2005 and later model year Otto-cycle heavy-duty engines and vehicles.
§ 86.007-11Emission standards and supplemental requirements for 2007 and later model year diesel heavy-duty engines and vehicles.
§ 86.007-15NOX and particulate averaging, trading, and banking for heavy-duty engines.
§ 86.007-17Onboard diagnostics for engines used in applications less than or equal to 14,000 pounds GVWR.
§ 86.007-21Application for certification.
§ 86.007-23Required data.
§ 86.007-30Certification.
§ 86.008-10Emission standards for 2008 and later model year Otto-cycle heavy-duty engines and vehicles.
§ 86.010-2Definitions.
§ 86.010-18On-board Diagnostics for engines used in applications greater than 14,000 pounds GVWR.
§ 86.010-38Maintenance instructions.
§ 86.012-2Definitions.
§ 86.016-1General applicability.
§ 86.078-3Abbreviations.
§ 86.078-6Hearings on certification.
§ 86.079-31Separate certification.
§ 86.079-32Addition of a vehicle or engine after certification.
§ 86.079-33Changes to a vehicle or engine covered by certification.
§ 86.079-39Submission of maintenance instructions.
§ 86.080-12Alternative certification procedures.
§ 86.082-2Definitions.
§ 86.082-34Alternative procedure for notification of additions and changes.
§ 86.084-2Definitions.
§ 86.084-4Section numbering; construction.
§ 86.085-2Definitions.
§ 86.085-20Incomplete vehicles, classification.
§ 86.085-37Production vehicles and engines.
§ 86.088-2Definitions.
§ 86.090-2Definitions.
§ 86.090-3Abbreviations.
§ 86.090-5General standards; increase in emissions; unsafe conditions.
§ 86.090-27Special test procedures.
§ 86.091-2Definitions.
§ 86.091-7Maintenance of records; submittal of information; right of entry.
§ 86.091-29Testing by the Administrator.
§ 86.092-2Definitions.
§ 86.093-2Definitions.
§ 86.094-2Definitions.
§ 86.094-3Abbreviations.
§ 86.094-7Maintenance of records; submittal of information; right of entry.
§ 86.094-14Small-volume manufacturer certification procedures.
§ 86.094-21Application for certification.
§ 86.094-22Approval of application for certification; test fleet selections; determinations of parameters subject to adjustment for certification and Selective Enforcement Audit, adequacy of limits, and physically adjustable ranges.
§ 86.094-25Maintenance.
§ 86.095-35Labeling.
§ 86.096-2Definitions.
§ 86.096-3Abbreviations.
§ 86.096-24Test vehicles and engines.
§ 86.098-2Definitions.
§ 86.098-3Abbreviations.
§ 86.098-10Emission standards for 1998 and later model year Otto-cycle heavy-duty engines and vehicles.
§ 86.098-23Required data.
§ 86.099-10Emission standards for 1999 and later model year Otto-cycle heavy-duty engines and vehicles.
§ 86.099-11Emission standards for 1999 and later model year diesel heavy-duty engines and vehicles.
eCFR Content