The EPA is taking final action on disapproval of SIP revisions Texas submitted for Regulation IV, 30 TAC Chapter 114, sections 114.1 ``Maintenance and Operation of Air Pollution Control Systems or Devices Used to Control Emissions from Motor Vehicles'' and 114.5 ``Exclusions and Exceptions'' on February 24, 1989, September 6, 1990, and July 13, 1993. The EPA is disapproving these revisions that relate to Statewide antitampering provisions and exemptions to antitampering provisions for motor vehicles or motor vehicle engine emission control systems. The EPA is taking final disapproval action because the State's antitampering rules are not consistent with the Clean Air Act (the Act), section 203(a)(3) and EPA's tampering prohibition as outlined in EPA's antitampering Enforcement Policy, Mobile Source Enforcement Memorandum No. 1A.