The Environmental Protection Agency (EPA) is finalizing the approval of changes to the North Carolina State Implementation Plan (SIP), submitted by the State of North Carolina through the North Carolina Division of Air Quality (NCDAQ) through a letter dated September 10, 2021. The SIP revision includes changes to the State's air pollution control requirements in the SIP that modify several definitions, clarify its applicability requirements, adjust the requirement for fugitive dust control plan submissions, and make minor language and formatting changes. EPA is approving these changes pursuant to the Clean Air Act (CAA or Act).