The Environmental Protection Agency (EPA) is approving under the Clean Air Act (CAA) a request from the Ohio Environmental Protection Agency (Ohio EPA) to revise the Ohio State Implementation Plan (SIP) to incorporate revisions to Ohio Administrative Code (OAC) Chapter 3745-14 regarding the Nitrogen Oxides (NO<INF>X</INF>) SIP Call. This SIP revision approves additional monitoring options for certain covered sources for NO<INF>X</INF> SIP Call purposes.