(a) A registered underground storage tank (UST) contractor is required to maintain insurance and net worth requirements, as required by §30.315 of this title (relating to Qualifications for an Initial Registration), throughout the period that the contractor holds a valid registration from the executive director.     
      (b) A UST contractor subject to the provisions of this subchapter employed or otherwise engaged by a UST owner or operator (or by any other person representing to be the UST owner or operator) to conduct the installation, repair, or removal of a UST shall comply with all applicable technical standards of Subchapter C of this chapter (relating to Technical Standards) and Chapter 213 of this title (relating to Edwards Aquifer).     
      (c) Compliance with the provisions of this subchapter by a registered contractor shall not relieve such contractor from the responsibility of compliance with all applicable regulations legally promulgated by the United States Environmental Protection Agency, United States Occupational Safety and Health Administration, United States Department of Transportation, Texas Department of State Health Services, Texas Department of Insurance (including state fire marshal), Railroad Commission of Texas, Texas Department of Agriculture, State Comptroller, Texas Department of Public Safety, Texas Commission on Environmental Quality, and other federal, state, and local governmental agencies or entities having appropriate jurisdiction.     
      (d) A UST contractor must have an on-site supervisor who is licensed by the agency under this subchapter at the site at all times during the critical junctures of the installation, repair, or removal, as defined in §30.307 of this title (relating to Definitions).     
      (e) A UST contractor must prominently display the UST contractor registration number on all bids, proposals, offers, and installation drawings.     
     Source Note:        The provisions of this §334.407 adopted to be effective August 3, 1990, 15 TexReg 4209; amended to be effective November 23, 2000, 25 TexReg 11442; amended to be effective December 17, 2001, 26 TexReg 10378; amended to be effective May 31, 2018, 43 TexReg 3390