EPA’s 1994 Lead-Time Finding Sparks Fight Over California Truck Waivers

Environmentalists and industry are sparring over whether a decades-old EPA determination requiring four years of lead time for prior vehicle emissions standards should limit California’s request for a preemption waiver to enforce its suite of zero-emission vehicle (ZEV) and air standards for heavy trucks. Truck manufacturers have seized on the agency’s 1994 determination to argue EPA must, at minimum, limit permission for California’s rules to certain model years. But environmental groups are pushing back, arguing the agency has since changed...