The EPA is taking final action making a finding, under the Clean Air Act (CAA or Act), that the State of Maryland has failed to submit an ozone nonattainment state implementation plan (SIP) revision required by the new classification for the area under EPA's final rule that reclassified the Metropolitan Washington, DC ozone nonattainment area to severe nonattainment. EPA is issuing a finding that the State of Maryland failed to submit a SIP revision that provides for the implementation of penalty fees upon major stationary sources of volatile organic compound and nitrogen oxide emissions in the Metropolitan Washington, DC severe ozone nonattainment area if the area fails to attain the one-hour ozone national ambient air quality standard. This action triggers the 18-month time clock for mandatory application of sanctions in Maryland and the 24-month time frame for EPA to promulgate a Federal implementation plan under the Act.