Tex. Util. Code § 58.060
After the expiration of the period during which the rates for basic network services are capped as prescribed by Section 58.054, an electing company may increase a rate for a basic network service only:
Acts 1997, 75th Leg., ch. 166, Sec. 1, eff. Sept. 1, 1997.
Amended by Acts 1999, 76th Leg., ch. 1212, Sec. 41, eff. Sept. 1, 1999.