Tex. Utilities Code § 104.151: UNREASONABLE OR VIOLATIVE EXISTING RATES.

(a) If the regulatory authority, on its own motion or on complaint by an affected person, after reasonable notice and hearing, finds that the existing rates of a gas utility for a service are unreasonable or in violation of law, the regulatory authority shall:

(1) enter an order establishing the just and reasonable rates to be observed thereafter, including maximum or minimum rates; and

(2) serve a copy of the order on the gas utility.

(b) The rates set under Subsection (a) constitute the legal rates of the gas utility until changed as provided by this subtitle.

Acts 1997, 75th Leg., ch. 166, Sec. 1, eff. Sept. 1, 1997.