The Environmental Protection Agency (EPA) is approving a revision to the Jefferson County portion of the Kentucky State Implementation Plan (SIP) submitted by the Commonwealth of Kentucky through the Kentucky Energy and Environment Cabinet (Cabinet) on June 15, 2022. The changes were submitted by the Cabinet on behalf of the Louisville Metro Air Pollution Control District (District, also referred to herein as Jefferson County). The District's revision modifies the permit application timing requirements in the Federally Enforceable District Origin Operating Permits (FEDOOP) rule in the Jefferson County portion of the Kentucky SIP (Jefferson County Local Implementation Plan, or LIP). EPA is finalizing these changes pursuant to the Clean Air Act (CAA or Act).