(a) A public utility may not impose a rule except as provided by this title.
(b) A public utility may file with the commission a standard, classification, rule, or practice the utility follows.
(c) The standard, classification, rule, or practice continues in force until:
(1) amended by the utility; or
(2) changed by the commission as provided by this subtitle.
Official text of the Texas Utilities Code as published by the Texas Legislative Council.