The Environmental Protection Agency (EPA) is approving portions of a State Implementation Plan (SIP) revision submitted by the State of North Carolina, through the North Carolina Division of Air Quality (NCDAQ) on June 5, 2017, as supplemented on June 28, 2018. This submittal seeks to revise the State's SIP-approved rules regarding nitrogen oxides (NO<INF>X</INF>) emissions from large stationary combustion sources. This action is being taken pursuant to section 110 of the Clean Air Act (CAA or Act).