The EPA is approving a State Implementation Plan (SIP) revision submitted on December 19, 2007 by the State of Connecticut. This SIP revision includes regulations to update the enhanced motor vehicle inspection and maintenance (I/M) program in Connecticut. The revised program includes a test and repair network and on-board diagnostic (OBD2) testing for 1996 and newer vehicles. The intended effect of this action is to approve the revised program into the Connecticut SIP. This action is being taken in accordance with the Clean Air Act.