EPA is approving Ohio's March 1, 2005, submittal of a revision to the Clinton County 1-hour ozone maintenance plan. Ohio held a public hearing on the submittal on February 8, 2005. This maintenance plan revision establishes a new transportation conformity motor vehicle emissions budget (MVEB) for the year 2006. EPA is approving the allocation of a portion of the safety margin for oxides of nitrogen (NO<INF>X</INF>) to the area's 2006 MVEB for transportation conformity purposes. This allocation will still maintain the total emissions for the area at or below the attainment level required by the transportation conformity regulations. The transportation conformity budget for volatile organic compounds will remain the same as previously approved in the maintenance plan. In this action, EPA is also correcting the codification for a previous approval action for Cincinnati, Ohio.