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  1. Home
  2. Clean Air Act Overview

Clean Air Act Title II - Emission Standards for Moving Sources, Parts A through C

On this page:

  • Part A - Motor Vehicle Emission and Fuel Standards
  • Part B - Aircraft Emission Standards
  • Part C - Clean Fuel Vehicles

This page has links to Clean Air Act sections that are part of the U.S. Code Collection maintained by the U. S. Government Publishing Office. EPA does not control the content of that website.

Part A - Motor Vehicle Emission and Fuel Standards

Clean Air Act SectionU.S. CodeTitle
2027521Emission standards for new motor vehicles or new motor vehicle engines
2037522Prohibited acts
2047523Actions to restrain violations
2057524Civil penalties
2067525Motor vehicle and motor vehicle engine compliance testing and certification
2077541Compliance by vehicles and engines in actual use
2087542Information collection
2097543State standards
2107544State grants
2117545Regulation of fuels
212--[Repealed] Development of low-emission vehicles
--7546Renewable fuel
2137547Nonroad engines and vehicles
2147548Study of particulate emissions from motor vehicles
2157549High altitude performance adjustments
2167550Definitions for Part A
--7551Omitted
2177552Motor vehicle compliance program fees
2187553Prohibition on production of engines requiring leaded gasoline
2197554Urban bus standards

Part B - Aircraft Emission Standards

Clean Air Act SectionU.S. CodeTitle
2317571Establishment of standards
2327572Enforcement of standards
2337573State standards and controls
2347574Definitions for Part B

Part C - Clean Fuel Vehicles

Clean Air Act SectionU.S. CodeTitle
2417581Definitions for Part C
2427582Requirements applicable to clean-fuel vehicles
2437583Standards for light-duty clean-fuel vehicles
2447584Administration and enforcement as per California standards
2457585Standards for heavy-duty clean-fuel vehicles (GVWR above 8,500 up to 26,000 lbs.)
2467586Centrally fueled fleets
2477587Vehicle conversions
2487588Federal agency fleets
2497589California pilot test program
2507590General provisions

Clean Air Act Table of Contents by Title

Clean Air Act Overview

  • Progress Cleaning the Air
  • Air Pollution Challenges
  • Requirements and History
  • Role of Science and Technology
  • Roles of State, Local, Tribal and Federal Governments
  • Developing Programs Through Dialogue
  • Flexibility with Accountability
  • The Clean Air Act and the Economy
Contact Us About the Clean Air Act
Contact Us About the Clean Air Act to ask a question, provide feedback, or report a problem.
Last updated on March 30, 2026
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