EPA is approving a request submitted by the Ohio Environmental Protection Agency (Ohio EPA) on March 17, 2009, to revise the Ohio State Implementation Plan (SIP) under the Clean Air Act (CAA). The State has submitted revisions to rules for approval under Ohio Administrative Code (OAC) Chapter 3745-15, "General Provisions," which include the adoption of the Federal definition and citation of the CAA, and clarifications for exemptions and new requirements for sources regulated under the Title V permitting program. These revisions are included in OAC 3745-15-01 and OAC 3745-15-05, respectively.