The Environmental Protection Agency (EPA) is updating the materials that are incorporated by reference (IBR) into the North Carolina State Implementation Plan (SIP). The regulations affected by this update have been previously submitted by North Carolina and approved by EPA. In this final rule, EPA is also notifying the public of corrections and clarifying changes in the Code of Federal Regulations (CFR) tables that identify material incorporated by reference into the North Carolina SIP. This update affects the materials that are available for public inspection at the National Archives and Records Administration (NARA) and the EPA Regional Office.