Sec. 104.004.  UNREASONABLE PREFERENCE OR PREJUDICE PROHIBITED.  A gas utility may not:
(1)  grant an unreasonable preference or advantage concerning rates or services to a person in a classification;
(2)  subject a person in a classification to an unreasonable prejudice or disadvantage concerning rates or services;  or
(3)  establish or maintain an unreasonable difference concerning rates of services between localities or between classes of service.
Acts 1997, 75th Leg., ch. 166, Sec. 1, eff. Sept. 1, 1997.