vehicle emission standards; waiver; rules

Arizona's HB 2252 amends Arizona Revised Statutes § 49-447 to require the state director to adopt vehicle emission rules for model year 2028 and newer vehicles that match California Air Resources Board standards, but only for standards the U.S. Environmental Protection Agency has granted California a waiver to use. This directly affects automakers selling new vehicles in Arizona and state agencies implementing emission rules. The bill mandates that the director notify state leadership (governor, legislative leaders, and secretary of state) about adopted rules and their alignment with California’s EPA-approved standards. It repeals an existing statute (§ 28-145) and ensures Arizona’s rules comply with federal Clean Air Act provisions.