EMA Complains CARB Plans Retroactive Enforcement Of ZEV Fleet Rule

September 17, 2024
Truck makers are charging that the California Air Resources Board (CARB) intends to retroactively enforce its Advanced Clean Fleets (ACF) zero-emission truck rule once it receives a federal preemption waiver from EPA, and they are urging the federal agency to make clear that the rule can only be enforced prospectively after a waiver is granted. “The prospect of retroactive enforcement of CARB’s mobile source regulations is antithetical to the scope and express terms of federal preemption and the process for...


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