The Environmental Protection Agency (EPA) is taking direct final action to approve a revision to a State Implementation Plan (SIP) submitted by the State of North Carolina, through the North Carolina Department of Environmental Quality's (NCDEQ) Division of Air Quality (DAQ) on December 11, 2015, that incorporates amendments to the state rules reflecting the 2012 national ambient air quality standards (NAAQS) for fine particulate matter (PM<INF>2.5</INF>). This action is being taken pursuant to the Clean Air Act (CAA or Act).