The Environmental Protection Agency (EPA) is granting direct final approval of revisions submitted by the State of Texas that affect the Texas State Implementation Plan (SIP) concerning Texas' motor vehicle air pollution rules. Based upon the State's submitted Texas clean fuel fleet (TCFF) program equivalency demonstration that the new Tier 2 and 2007 heavy-duty diesel vehicles and engines meet or exceed the LEV requirement, we are approving the removal of the TCFF program's repealed low emission vehicle (LEV) rules and mobile emission reduction credit (MERC) rules from the Texas SIP. We also are approving the removal of the Transportation Control Measures (TCM) substitution repealed rules from the Texas SIP. We are approving as part of the SIP a new Texas Clean Fleet (TCF) program, with submitted revisions, to incentivize replacement of diesel vehicles and engines with alternatively fueled vehicles and engines, including hybrids.