Tex. Utilities Code § 58.051

(a) Unless reclassified under Section 58.024, the following services are basic network services:

(1) flat rate residential local exchange telephone service, including primary directory listings and the receipt of a directory and any applicable mileage or zone charges;

(2) residential tone dialing service;

(3) lifeline and tel-assistance service;

(4) service connection for basic residential services;

(5) direct inward dialing service for basic residential services;

(6) private pay telephone access service;

(7) call trap and trace service;

(8) access for all residential and business end users to 911 service provided by a local authority and access to dual party relay service;

(9) mandatory residential extended area service arrangements; and

(10) mandatory residential extended metropolitan service or other mandatory residential toll-free calling arrangements.

(a-1) Notwithstanding Subsection (a) and Section 58.151, basic network services include residential caller identification services if the customer to whom the service is billed is at least 65 years of age.

(b) Electing companies shall offer each basic network service as a separately tariffed service in addition to any packages or other pricing flexibility offerings that include those basic network services.

(c) At the election of the affected incumbent local exchange company, the price for basic network service shall also include the fees and charges for any mandatory extended area service arrangements, mandatory expanded toll-free calling plans, and any other service included in the definition of basic network service.

(d) A nonpermanent expanded toll-free local calling service surcharge established by the commission to recover the costs of mandatory expanded toll-free local calling service:

(1) is considered a part of basic network service;

(2) may not be aggregated under Subsection (c); and

(3) continues to be transitioned in accordance with commission orders and substantive rules.