Rulemakings

Here you can find links to several current and former regulatory proceedings pertaining to California’s clean transportation transition.

California Air Resource Board (CARB)

Low Carbon Fuel Standard – rulemakings: November 8, 2024 adopted amendments and Office of Administrative Law (OAL) actions*.
*OAL disapproved amendments on February 18, 2025. Revisions package submitted by CARB May 16, 2025.
In-Use Locomotive Regulation – Public Hearing to Consider Proposed Repeal: noticed for June 26, 2025 at 4 pm PT.
Advanced Clean Fleets – background & rulemakings – upcoming regulatory action to repeal High Priority & Drayage fleet requirements (by October 31, 2025).

2022 Scoping Plan Update – background
2022 State Strategy for the State Implementation Plan – background
2020 Mobile Source Strategy – background
Advanced Clean Trucks – background and rulemakings (Recent amendments approved by OAL on May 9, 2025)
Heavy-duty Omnibus Regulation – background
Truck and Bus Regulation – background