Sec. 53.003.  JUST AND REASONABLE RATES.  (a)  The commission shall ensure that each rate a public utility or two or more public utilities jointly make, demand, or receive is just and reasonable.
(b)  A rate may not be unreasonably preferential, prejudicial, or discriminatory but must be sufficient, equitable, and consistent in application to each class of consumer.
(c)  A public utility may not:
(1)  grant an unreasonable preference or advantage concerning rates to a person in a classification;
(2)  subject a person in a classification to an unreasonable prejudice or disadvantage concerning rates;  or
(3)  establish or maintain an unreasonable difference concerning rates between localities or between classes of service.
(d)  In establishing a public utility's rates, the commission may treat as a single class two or more municipalities that a public utility serves if the commission considers that treatment to be appropriate.
Acts 1997, 75th Leg., ch. 166, Sec. 1, eff. Sept. 1, 1997.