Tex. Utilities Code § 60.124: INTEROPERABLE NETWORKS REQUIRED.

(a) The commission shall require each telecommunications provider to maintain interoperable networks.

(b) The commission may:

(1) adopt rules, including generic rules that are responsive to changes in federal law or a development in the local exchange market; and

(2) set policies governing interconnection arrangements.

Acts 1997, 75th Leg., ch. 166, Sec. 1, eff. Sept. 1, 1997.