Tex. Tax Code § 321.210

(a) There are exempted from the taxes imposed under this chapter the sales within the municipality of telecommunications services unless the application of the exemption is repealed under this section. A municipality may not repeal the application of this exemption as it applies to interstate long-distance telecommunications services, but if a municipality has repealed the exemption before the effective date of Part 4, Article 1, H.B. No. 61, Acts of the 70th Legislature, 2nd Called Session, 1987, interstate long-distance telecommunications services in that municipality are not subject to taxes imposed under this chapter.

(b) The governing body of a municipality by ordinance adopted by a majority vote of the governing body in the manner required for the adoption of other ordinances may repeal the application of the exemption provided by Subsection (a) for telecommunications services sold within the municipality.

(c) A municipality that has repealed the application of the exemption may in the same manner reinstate the exemption.

(d) A vote of the governing body of a municipality repealing the application of or reinstating the exemption must be entered in the minutes of the municipality. The municipal secretary shall send to the comptroller by United States certified or registered mail a copy of each ordinance adopted under this section. The repeal of the application of the exemption or a reinstated exemption takes effect within the municipality as provided by Section 321.102(a) after receipt of a copy of the ordinance.