Texas Health and Safety Code - HEALTH & SAFETY § 382.019. Methods Used to Control and Reduce Emissions from Land Vehicles

(a) Except as provided by Section 382.202(j), or another provision of this chapter, the commission by rule may provide requirements concerning the particular method to be used to control and reduce emissions from engines used to propel land vehicles.

(b) The commission may not require, as a condition precedent to the initial sale of a vehicle or vehicular equipment, the inspection, certification, or other approval of any feature or equipment designed to control emissions from motor vehicles if that feature or equipment has been certified, approved, or otherwise authorized under federal law.

(c) The commission or any other state agency may not adopt a rule requiring the use of Stage II vapor recovery systems that control motor vehicle refueling emissions at a gasoline dispensing facility in this state until the United States Environmental Protection Agency determines that the use of the system is required for compliance with the federal Clean Air Act (42 U.S.C. 7401 et seq.), except the commission may adopt rules requiring such vapor recovery systems installed in nonattainment areas if it can be demonstrated to be necessary for the attainment of federal ozone ambient air quality standards or, following appropriate health studies and in consultation with the Department of State Health Services, it is determined to be necessary for the protection of public health.