California’s Waiver Requests Face Uncertain Fate Amid EPA Time Crunch

With time waning for the Biden EPA to act on California’s eight requests for preemption waivers for mobile source emissions rules, the agency may prioritize the requests, including a scenario in which it narrows or does not act on waivers for the state’s zero-emissions vehicle (ZEV) mandates for truck fleets and first-time standards for existing locomotives. The uncertain outlook for those rules contrasts with other high-profile waiver requests for California’s passenger vehicle ZEV standards and its truck nitrogen oxides (NOx)...