Tex. Utilities Code § 55.023: OPTIONAL EXTENDED AREA SERVICE.

(a) The commission may order optional extended area service in a specified calling area if:

(1) each affected company and the representatives of at least one political subdivision in the proposed calling area agree to the service; and

(2) the proposed common calling area has a single, continuous boundary.

(b) The commission may not adopt rules that diminish in any manner the ability of an affected company or a political subdivision to enter into joint agreements for optional extended area service under this section.

(c) In this section, "political subdivision" means:

(1) a county;

(2) a municipality; or

(3) an unincorporated town or village that has 275 or more access lines.

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