CARB: Advanced Clean Fleet

Scope

This regulation applies to government fleets that operate covered vehicles in California. The requirements for drayage and high priority fleets have been delayed indefinitely.

Regulatory citations

• Title 13, California Code of Regulations, Chapter 1, Articles 3.2 to 3.4, Sections 2013 to 2015.6

Key definitions

• California Air Resources Board (CARB): The state agency in California charged with controlling air pollution.
• Covered vehicle: A vehicle operated by a fleet that has a gross vehicle weight rating (GVWR) of 8,501 pounds or more.
• Drayage fleet: A fleet that operates drayage vehicles.
• Drayage vehicles: Covered vehicles that operate into, in, or out of port and rail facilities.
• High priority fleet: A fleet that operates covered vehicles in California and have:
  • 50 or more covered vehicles operating in California, or
  • One covered vehicle operating in California and an annual revenue of $50 million or more (based on tax records filed with the Internal Revenue Service).

• Internal combustion engine (ICE) vehicle: A vehicle equipped with an internal combustion engine.
• Truck Regulations Upload, Compliance, and Reporting System (TRUCRS): TRUCRS is used for meeting reporting requirements for several in-use fleet regulations, including ACF.
• Useful life of a vehicle: The useful life of a vehicle is defined as 13 years and 800,000 miles. If the vehicle is under 800,000 miles when it reached 13 years, the useful life can be extended up to 18 years, or until the vehicle reach 800,000 miles, whichever comes first.
• Zero emissions vehicle (ZEV): A vehicle that CARB has certified as operating with zero emissions. Examples include battery-powered vehicles and vehicles powered by hydrogen fuel cells.

Summary of requirements

Under the ACF regulation, government fleets, drayage fleets, and high priority fleets were to have register their California fleet (vehicles used in California) in the ACF portion of CARB’s TRUCRS system and transition to zero emissions vehicles (ZEVs). However, as of January 2025, the drayage fleet and high priority fleet portions of ACF have been delayed indefinitely. This is due to CARB withdrawing its US EPA waiver request. Without the waiver, CARB cannot implement the drayage truck and high priority fleet portions of the program.

However, the state and local government portion of the regulation is still in effect. This means state and local government fleets in California must replace the internal combustion engine (ICE) units used in their California fleet with ZEVs beginning in 2024.