California Air Resources Board Waives Clean Air Act Preemption for Heavy-Duty Vehicle Emissions Standards

Summary

The California Air Resources Board (CARB) has received a waiver from the Environmental Protection Agency (EPA) to relax the Clean Air Act standards for 2010-2012 model year heavy-duty vehicles and engines, and for 2013 model year and later vehicles, under the Clean Air Act. This waiver confirms that CARB's amendments to the on-board diagnostic requirements are within the scope of a previous waiver of preemption.