The California Air Resources Board (CARB) was faced with a dilemma regarding their Advanced Clean Fleet (ACF) rule because they lacked the authority to enforce the rule as it is more stringent than federal regulations.
CARB applied for a waiver from the US Environmental Protection Agency (EPA) in November of 2023, but it can take 9-24 months for a waiver to be granted.
In conversations between the California Trucking Association (CTA), the state’s Attorney General’s office and CARB, CARB agreed not to enforce the ACF regulation until they received the waiver.
Note…enforcement may be put on hold but the required compliance and registrations remain intact as does the CTA’s lawsuit against CARB.