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)

CARB Board Meetings
Environmental Justice Advisory Committee (EJAC) Meetings

ACTIVE Proceedings

Low Carbon Fuel Standard – rulemakings: Final approval of November 8, 2024 amendments by the Office of Administrative Law (OAL) occurred on June 27, 2025. The changes went into effect on July 1, 2025.
Advanced Clean Fleets – background & rulemakings | 2025 proposed amendments to repeal High Priority & Drayage fleet requirements (September 25, 2025).

PAST Rulemakings

In-Use Locomotive Regulation – background | Regulation Repeal (Action taken June 26, 2025) – rulemaking
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

Certifications

Cummins X15N
- CARB Executive Order
- U.S. EPA Certification