The Environmental Protection Agency (EPA) is taking final action to approve portions of the State Implementation Plan (SIP) submission, submitted by the State of North Carolina, through the Department of Environmental Quality, formerly the Department of Environment and Natural Resources, Division of Air Quality (DAQ), on March 18, 2014, for inclusion into the North Carolina SIP. This final action pertains to the infrastructure requirements of the Clean Air Act (CAA or Act) for the 2010 1-hour sulfur dioxide (SO<INF>2</INF>) national ambient air quality standard (NAAQS). The CAA requires that each state adopt and submit a SIP for the implementation, maintenance and enforcement of each NAAQS promulgated by EPA, which is commonly referred to as an "infrastructure SIP submission." DAQ certified that the North Carolina SIP contains provisions that ensure the 2010 1-hour SO<INF>2</INF> NAAQS is implemented, enforced, and maintained in North Carolina. EPA has determined that the North Carolina's infrastructure SIP submission, provided to EPA on March 18, 2014, satisfies certain required infrastructure elements for the 2010 1-hour SO<INF>2</INF> NAAQS.