We are converting our limited approval under the Clean Air Act of the State of Connecticut's State Implementation Plan (SIP) revision for an enhanced vehicle inspection and maintenance (I/M) program, which was granted on March 10, 1999 (64 FR 12005), to a full approval. In our March 10, 1999 limited approval, we said Connecticut needed to submit revisions to its SIP to address eight sections of EPA's enhanced I/M regulation for full approval. We have determined that on November 16, 1999 Connecticut submitted revisions that meet all of the conditions for full approval. The intent of this action is to convert our limited approval of Connecticut's enhanced vehicle I/M program SIP to a full approval.