The Environmental Protection Agency (EPA) is taking final action to approve a State Implementation Plan (SIP) revision submitted by the North Carolina Department of Environmental Quality, Division of Air Quality (DAQ), on March 21, 2018, readopting and amending several air quality rules, and requesting to remove the rules for the oxygenated gasoline program. This SIP revision also contains a non- interference demonstration, which concludes that removing the oxygenated gasoline program would not interfere with attainment or maintenance of the National Ambient Air Quality Standards (NAAQS). EPA has determined that North Carolina's March 21, 2018, SIP revision is consistent with the applicable provisions of the Clean Air Act (CAA or Act).