California Air Resources Board

The following files contain the latest clean versions (without underline and strikeout) of CARB's regulations and most of the test procedures for low-emission vehicles and zero-emission vehicles.

• The California Low-Emission Vehicle Regulations for Passenger Cars, Light-Duty Trucks and Medium-Duty Vehicles, including all or portions of Sections 1900, 1956.8, 1960.1, 1960.5, 1961, 1961.1, 1961.2, 1961.3, 1961.4, 1962, 1962.1, 1962.2, 1962.3, 1962.4, 1962.5, 1962.6, 1962.7, 1962.8, 1965, 1976, 1978, 2037,2038, 2062, 2101, and 2235 title 13, California Code of Regulations, as of November 30, 2022.
• "California Exhaust Emission Standards and Test Procedures for 1988 Through 2000 Model Passenger Cars, Light-Duty Trucks and Medium-Duty Vehicles," as of December 1, 1999 (last amended August 5, 1999), incorporated by reference in Section 1960.1(k), Title 13, CCR
• The "California 2001 through 2014 Model Criteria Pollutant Exhaust Emission Standards and Test Procedures and 2009 through 2016 Model Greenhouse Gas Exhaust Emission Standards and Test Procedures for Passenger Cars, Light-Duty Trucks, and Medium-Duty Vehicles," as of December 31, 2012 (last amended December 6, 2012) incorporated by reference in Section 1961(d), Title 13, CCR
• The "California 2015 and Subsequent Model Criteria Pollutant Exhaust Emission Standards and Test Procedures and 2017 and Subsequent Model Greenhouse Gas Exhaust Emission Standards and Test Procedures for Passenger Cars, Light Duty Trucks, and Medium Duty Vehicles," as of April 1, 2022 (last amended September 9, 2021) incorporated by reference in Section 1961.2(d), Title 13, CCR
• “California 2015 through 2025 Model Year Criteria Pollutant Exhaust Emission Standards and Test Procedures and 2017 and Subsequent Model Year Greenhouse Gas Exhaust Emission Standards and Test Procedures for Passenger Cars, Light Duty Trucks, and Medium Duty Vehicles,” as of November 30, 2022 (last amended August 25, 2022), incorporated by reference in Section 1961.2(d), Title 13, CCR
• “California 2026 and Subsequent Model Year Criteria Pollutant Emission Standards and Test Procedures for Passenger Cars, Light-Duty Trucks, and Medium-Duty Vehicles,” as of November 30, 2022 (adopted August 25, 2022), incorporated by reference in Section 1961.4(c)(1), Title 13, CCR
• "California Exhaust Emission Standards and Test Procedures for 2005 through 2008 Model Zero-Emission Vehicles, and 2001 and through 2008 Model Hybrid- Electric Vehicles, in the Passenger Car, Light-Duty Truck and Medium-Duty Vehicle Classes," as of February 13, 2010 (last amended December 2, 2009), incorporated by reference in Section 1962(e), Title 13, CCR
• "California Exhaust Emission Standards and Test Procedures for 2009 through 2017 Model Zero-Emission Vehicles, and Hybrid- Electric Vehicles, in the Passenger Car, Light-Duty Truck and Medium-Duty Vehicle Classes," as of January 1, 2016 (last amended September 3, 2015), incorporated by reference in Section 1962.1(h), Title 13, CCR
• "California Exhaust Emission Standards and Test Procedures for 2018 Through 2025 Model Year Zero-Emission Vehicles and Hybrid Electric Vehicles, in the Passenger Car, Light-Duty Truck and Medium-Duty Vehicle Classes," as of November 30, 2022 (last amended August 25, 2022), incorporated by reference in Section 1962.2(h), Title 13, CCR
• California Test Procedures for 2026 and Subsequent Model Year Zero-Emission Vehicles and Plug-in Hybrid Electric Vehicles, in the Passenger Car, Light-Duty Truck and Medium-Duty Vehicle Classes," as of November 30, 2022 (last amended August 25, 2022), incorporated by reference in Section 1962.4(d), Title 13, CCR
• "California Assembly-Line Test Procedures for 1998 Through 2000 Model Passenger Cars, Light-Duty Trucks and Medium-Duty Vehicles" as of December 1, 1999 (last amended August 5, 1999), incorporated by reference in Section 2062, Title 13, CCR 
• "California Assembly-Line Test Procedures for 2001 and Subsequent Model-Year Passenger Cars, Light-Duty Trucks and Medium-Duty Vehicles," as of December 1, 1999 (adopted August 5, 1999), incorporated by reference in Section 2062, Title 13, CCR
• "California New Vehicle Compliance Test Procedures" as of December 1, 1999 (last amended August 5, 1999), incorporated by reference in Section 2101(b), Title 13, CCR
• "California Motor Vehicle Emission Control and Smog Index Label Specifications for 1978 through 2003 Model Year Motorcycles, Light-, Medium- and Heavy-Duty Engines and Vehicles," as of December 1, 1999 (last amended September 5, 2003), incorporated by reference in Section 1965, Title 13, CCR
• "California Motor Vehicle Smog Index Label Specifications for 2004 through 2009 Model Passenger Cars and Light-Duty Trucks," as of June 16, 2008 (last amended May 2, 2008), incorporated by reference in Section 1965, Title 13, CCR
• "California Environmental Performance Label Specifications for 2009 and Subsequent Model Year Passenger Cars, Light-Duty Trucks, and Medium-Duty Passenger Vehicles," as of October 8, 2015 (last amended September 2, 2015), incorporated by reference in Section 1965, Title 13, CCR
• "Guidelines for Certification of 1983 Through 2002 Model-Year Federally-Certified Light-Duty Motor Vehicles for Sale in California," as of October 16, 2002 (last amended July 30, 2002), incorporated by reference in Section 1960.5(c), Title 13, CCR
• "Guidelines for Certification of 2003 and Subsequent Model-Year Federally-Certified Light-Duty Motor Vehicles for Sale in California," as of October 16, 2002 (adopted July 30, 2002),incorporated by reference in Section 1960.5(c), Title 13, CCR
• "California Non-Methane Organic Gas Test Procedures for 1993 Through 2016 Model Year Vehicles", as of October 8, 2015 (last amended September 2, 2015), incorporated by reference in Section 1961.2(d), Title 13, CCR
• "California Non-Methane Organic Gas Test Procedures for 2017 and Subsequent Model Year Vehicles", as of November 30, 2022 (last amended August 25, 2022), incorporated by reference in Section 1961.2(d), Title 13, CCR
• “California Test Procedures for Evaluating Substitute Fuels and New Clean Fuels in 2015 and Subsequent Years”, as of November 30, 2022 (last amended August 25, 2022), incorporated by reference in Section 2317(a)(1), Title 13, CCR

Evaporative Emissions

To obtain the latest clean versions (without underline and strikeout) of the California evaporative and refueling emissions test procedures, visit Evaporative Emissions Controls for Motor Vehicles.

On-Board Diagnostics Regulations

To obtain the latest clean versions (without underline and strikeout) of the California on-board diagnostics regulations, visit OBD II Regulations and Rulemaking.