EPA is taking direct final action to approve a revision to the North Carolina State Implementation Plan (SIP), submitted to EPA on February 7, 2011, by the State of North Carolina, through the North Carolina Department of Environment and Natural Resources (NCDENR), Division of Air Quality (DAQ). North Carolina's February 7, 2011, submission supplements the original redesignation request and maintenance plan for the Rocky Mount, North Carolina 1997 8-hour ozone area submitted on June 19, 2006, and approved by EPA on November 6, 2006. The Rocky Mount, North Carolina 1997 8-hour ozone area is comprised of Edgecombe and Nash Counties in North Carolina. North Carolina's February 7, 2011, SIP revision increases the safety margin allocated to motor vehicle emissions budgets (MVEBs) for both Edgecombe and Nash Counties to account for changes in the emissions model and vehicle miles traveled (VMT) projection model. EPA is approving this SIP revision pursuant to section 110 of the Clean Air Act (CAA or Act). North Carolina's February 7, 2011, SIP revision meets all of the statutory and regulatory requirements, and is consistent with EPA's guidance.