Tex. Util. Code § 59.021
(a) An incumbent local exchange company may elect to make an infrastructure commitment and to be subject to corresponding regulation under this chapter if the company:
(c) A company electing under this chapter may renew the election for successive two-year periods. An election that is renewed under this subsection remains in effect until the earlier of the date that:
Acts 1997, 75th Leg., ch. 166, Sec. 1, eff. Sept. 1, 1997.
Amended by Acts 1999, 76th Leg., ch. 1212, Sec. 46, eff. Sept. 1, 1999.