(a) An aboveground storage tank that is not exempt from regulation under § 26.344 of this code is subject to the registration requirements of § 26.346 of this code and to regulation by the commission only to the extent prescribed by this subchapter.
(b) The commission may not develop a regulatory program for aboveground storage tanks that is more extensive than the regulatory program authorized by this subchapter unless additional regulation of aboveground storage tanks is necessary to comply or be in conformity with requirements adopted by the United States Environmental Protection Agency or with federal law.