The Environmental Protection Agency (EPA) is finding that 15 states and the District of Columbia have failed to submit State Implementation Plan (SIP) revisions in a timely manner to satisfy certain requirements for the 2008 ozone National Ambient Air Quality Standards (NAAQS) that apply to nonattainment areas and/or states in the Ozone Transport Region (OTR). As explained in this action, consistent with the Clean Air Act (CAA) and EPA regulations, these findings of failure to submit establish certain deadlines for the imposition of sanctions, if a state does not submit a timely SIP revision addressing the requirements for which the finding is being made, and for the EPA to promulgate a Federal Implementation Plan (FIP) to address any outstanding SIP requirements.