Quote:
Originally Posted by Martinjlm
The foundational issue is that California was regulating emissions before the federal government established emissions regulations. So when the federal government did start regulating emissions, California was granted a waiver to continue to regulate their own emissions rather than be forced to adopt federal regulations. In addition, states are allowed to choose whether they follow the federal or the California regulations. About a dozen states, roughly 40% of the vehicle volume sold in the US, attach to the CARB regulations. Several of the states that were subscribed to Advanced Clean Cars I (waiver granted to cover 2022 - 2025) have not yet subscribed to ACC II.
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I appreciate the historical context.