This action approves three revisions to the I/M SIP submitted by the State, thereby removing the conditions for final approval. The program was initially given conditional interim approval by the EPA on July 11, 1997 (62 FR 37138). The action is being taken under section 348 of the National Highway System Designation Act of 1995 (NHSDA) and section 110 of the Clean Air Act (Act). The EPA is removing the conditions from the interim approval because the State's SIP revisions correct the major conditions identified in the July 11, 1997, conditional interim approval action. In today's Federal Register action, EPA is finding that the State has obtained the legislative authority needed to meet the major conditions contained in EPA's July 11, 1997 action. Today's action also approves into the SIP the definition of ``primarily operated,'' the State's commitment to implement On-Board Diagnostic testing, and removes the requirement for Test-on-Resale from the SIP.