EPA is approving a State Implementation Plan (SIP) revision submitted by the State of Connecticut. This action approves Connecticut's one-hour Ozone Attainment Demonstration for the Connecticut portion of the New York-Northern New Jersey-Long Island (NY-NJ-CT) severe ozone nonattainment area. EPA is also approving a variety of enforceable commitments associated with the attainment demonstration, Connecticut's post-1999 rate-of-progress (ROP) plan SIP and associated ROP contingency measures, and a reasonably available control measure (RACM) analysis submitted by the state. The post-1999 ROP plan and attainment demonstration establish 2002, 2005 and 2007 volatile organic compound (VOC) and nitrogen oxide (NO<INF>X</INF>) motor vehicle emissions budgets for the area for use in transportation conformity. EPA is also approving these budgets. Along with approving the commitments for the Connecticut portion of the New York-Northern New Jersey-Long Island (NY-NJ-CT) severe ozone nonattainment area, EPA is also approving a modification to the previously approved enforceable commitment associated with the attainment demonstration for the Greater Connecticut ozone nonattainment area. That modification changes the date for submittal of the mid-course review of the attainment status of the one-hour ozone nonattainment area from December 31, 2003 to December 31, 2004.