The EPA is approving State Implementation Plan (SIP) revisions submitted by the State of Texas on establishing a Vehicle Inspection and Maintenance (I/M) Program for the Dallas/Fort Worth (DFW), Houston- Galveston Area (HGA), and El Paso (ELP) nonattainment areas. EPA proposed approval of the DFW I/M SIP revision on January 22, 2001, and the HGA I/M SIP revision on June 11, 2001. The revisions replace the two-speed idle test in Dallas, Tarrant, and Harris Counties with ASM-2, expand the upgraded I/M program to cover the entire DFW nonattainment area plus five additional counties, and the eight county HGA nonattainment area. The revisions also implement On-Board Diagnostic (OBD) testing in the DFW and HGA testing areas, and El Paso County. The I/M SIP revisions are part of the DFW and HGA Attainment Demonstrations.