Tex. Utilities Code § 59.031

(a) Notwithstanding Section 59.027(b) or Subchapter F, Chapter 60, an electing company may exercise pricing flexibility in accordance with this section, including the packaging of any regulated service such as basic local telecommunications service with any other regulated or unregulated service or any service of an affiliate. The electing company may exercise pricing flexibility 10 days after providing an informational notice to the commission, to the office, and to any person who holds a certificate of operating authority in the electing company's certificated area or areas or who has an effective interconnection agreement with the electing company. Pricing flexibility includes all pricing arrangements included in the definition of "pricing flexibility" prescribed by Section 51.002(7) and includes packaging of regulated services with unregulated services or any service of an affiliate.

(b) An electing company, at the company's option, shall price each regulated service offered separately or as part of a package under Subsection (a) at either the service's tariffed rate or at a rate not lower than the service's long run incremental cost. The commission shall allow a company serving fewer than one million access lines to establish a service's long run incremental cost by adopting, at that company's option, the cost studies of a larger company for that service that have been accepted by the commission.

(c) An affected person, the office on behalf of residential or small commercial customers, or the commission may file a complaint alleging that an electing company has priced a regulated service in a manner that does not meet the pricing standards of this subchapter. The complaint must be filed before the 31st day after the company implements the rate.