As additions to Ohio's State Implementation Plan (SIP) under the Clean Air Act, EPA is approving six Permit-by-Rule (PBR) provisions, a Permit to Install and Operate (PTIO) program, two permanent exemptions from the Permit to Install (PTI) requirement, and a General Permit program. The Ohio Environmental Protection Agency (OEPA) requested these rule revisions to make its air pollution permit program more efficient. Approving these additions will make the PBRs, PTIOs, and general permits Federally enforceable. Because these rule revisions will make Ohio's air permit program more efficient while continuing to protect human health and the environment, EPA approves the revisions.