Friday, 3rd April 2026

California Air Resources Board

The California Air Resources Board (CARB or Board) has posted a Notice of Public Availability of Modified Text and Availability of Additional Documents and Information for the Advanced Clean Fleets and Low Carbon Fuel Standard Regulation. At its September 25, 2025, public hearing, the California Air Resources Board (CARB or Board) adopted the amendments. The Board adopted amendments to the State and local government requirements of section 2013 that provide more flexibility beyond the statutory requirements of Assembly Bill (AB) 1594 and the original staff proposal while maintaining progress towards reducing emissions. The actions taken repeal the Drayage, High Priority, and Federal Fleet requirements from the Advanced Clean Fleets (ACF) Regulation, providing greater certainty to those entities that they do not need to demonstrate compliance. The Low Carbon Fuel Standard (LCFS) amendments to Title 17 provide stronger crediting support for hydrogen stations and more adequately support development of stations that can accommodate the refueling demand of larger medium-duty hydrogen fuel cell electric vehicles. These proposed modifications only apply to the portion of the ACF regulation that is applicable to State and local government fleets. These proposed modifications do not modify the LCFS regulation amendments nor the repeal of the Drayage and High Priority Fleet requirements approved by the Board in September. Written comments will only be accepted on the modifications identified in the 15-Day Notice. The public comment period for this regulatory action will begin on, April 2, 2026. Written comments must be received no later than April 17, 2026.