Regulation on State, Local Fleets Still in Effect by ACWA Staff Jun 17, 2025 Water News President Donald Trump signed three measures on June 12 to block California’s Clean Air Act Waivers to administer California Air Resources Board (CARB) programs including: the Advanced Clean Cars Program, the Advanced Clean Truck Program, and the Omnibus Low Nitrogen Emissions Program. These three measures are not related to the Advanced Clean Fleets (ACF) regulation, so CARB is still enforcing the state and local fleet requirements which were effective as of Jan. 1, 2024. In response to President Trump’s measures, Gov. Gavin Newsom released Executive Order N-27-25 which reaffirms California’s commitment to phasing out gas and diesel vehicles through existing and new regulations. California Attorney General Rob Bonta filed a lawsuit against President Trump and U.S. Environmental Protection Agency Administrator Lee Zeldin. ACWA staff is continuing to work with CARB to advocate for flexibilities for public agencies’ compliance with the ACF regulation that keep essential public services intact and is working with ACWA members to describe compliance challenges faced by individual fleets.
