Tex. Util. Code § 58.023
On election, the services provided by an electing company are classified into two categories:
Acts 1997, 75th Leg., ch. 166, Sec. 1, eff. Sept. 1, 1997.
Amended by Acts 1999, 76th Leg., ch. 1212, Sec. 36, eff. Sept. 1, 1999.