The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by the State of Connecticut on December 14, 2015. This SIP revision includes Connecticut's revised regulations for new motor vehicle emission standards. Connecticut updated its motor vehicle emission regulations to adopt California's Advanced Clean Car (ACC) I program that includes California's low emission vehicle (LEV) III criteria pollutant standards and zero-emission vehicle (ZEV) sales requirements through the 2025 model year, and greenhouse gas (GHG) emissions standards that commence in the 2017 model year. Connecticut ensured that its regulations are identical to the California standards for which a waiver has been granted, as required by the Clean Air Act (CAA).