Approval and Promulgation of Air Quality Implementation Plans; Maryland; Motor Vehicle Inspection and Maintenance Program-Request for Delay in the Incorporation of On-Board Diagnostics Testing

EPA is taking direct final action to approve revisions to the Maryland State Implementation Plan (SIP). Maryland has requested a six- month extension of the Federal deadline to incorporate electronic checks to of On-board Diagnostic (OBD) computer systems of 1996-and- newer vehicles into Maryland's motor vehicle emissions inspection and maintenance (I/M) program. EPA's rules governing I/M programs required states to add OBD checks to their I/M programs by January 1, 2002. However, EPA's same rule provides states the option to submit a request for delay of this deadline by up to one additional year, provided each state making such a request for delay demonstrates to EPA that such a delay was necessary. Maryland has requested a six-month delay provided for by EPA's regulations (i.e., until July 1, 2002) in commencing OBD checks as part of its I/M program. EPA has reviewed Maryland's request, and is proposing through this action to grant Maryland's request for a six- month extension of the OBD testing deadline in accordance with the requirements of the Clean Air Act.