The Environmental Protection Agency (EPA) is approving changes to the Jefferson County portion of the Kentucky State Implementation Plan (SIP) submitted by the Commonwealth of Kentucky through the Kentucky Division for Air Quality (KDAQ) on May 30, 2023. The changes were submitted by KDAQ on behalf of the Louisville Metro Air Pollution Control District (District, also referred to herein as Jefferson County). EPA is approving changes to the District's rules which clarify that a fire for general agricultural production must be a controlled burn; to allow the use of District-approved accelerants to start certain fires; and to adjust paragraph numbering. EPA is approving the changes pursuant to the Clean Air Act (CAA or Act) and its implementing regulations.