Sec. 104.253. RULE OR STANDARD. (a) A gas utility may file with the regulatory authority a standard, classification, regulation, or practice the utility follows. (b) The standard, classification, regulation, or practice continues in force until: (1) amended by the utility; or (2) changed by the regulatory authority as provided by this subtitle. Acts 1997, 75th Leg., ch. 166, Sec. 1, eff. Sept. 1, 1997.