The Environmental Protection Agency (EPA) is taking final action to approve revisions to the North Carolina State Implementation Plan (SIP), submitted by the North Carolina Department of Environment and Natural Resources (DENR), Division of Air Quality (DAQ), on February 5, 2013, and supplemented on July 27, 2015. The submissions pertain to conflict of interest requirements of the Clean Air Act (CAA or Act) and were submitted to satisfy the infrastructure SIP sub- element related to the state board for the 2010 Nitrogen Dioxide (NO<INF>2</INF>) National Ambient Air Quality Standards (NAAQS), 2010 Sulfur Dioxide (SO<INF>2</INF>) NAAQS, 2008 8-hour Ozone NAAQS and 2008 Lead NAAQS. The CAA requires that each state adopt and submit a SIP for the implementation, maintenance, and enforcement of each NAAQS promulgated by EPA, commonly referred to as an "infrastructure" SIP, which includes conflict of interest requirements. EPA is taking final action to approve the portions of North Carolina's 2010 NO<INF>2</INF> infrastructure SIP, 2010 SO<INF>2</INF> infrastructure SIP, 2008 8-hour ozone infrastructure SIP, and 2008 Lead infrastructure SIP as meeting these State board requirements. EPA is also taking final action to convert conditional approvals related to the state board requirements for the 1997 8-hour ozone NAAQS, and the 1997 Annual Fine Particulate Matter (PM<INF>2.5</INF>) and 2006 24-hour PM<INF>2.5</INF> NAAQS to full approval under the CAA. EPA notes that all other applicable North Carolina infrastructure SIP elements for the above listed NAAQS have been or will be addressed in separate rulemakings.