Tex. Local Government Code § 158.007

(a) In a county that has a population of more than 1.3 million and a civil service system created under this subchapter, the qualified voters of the county, voting at an election called for that purpose, may determine whether the system will be dissolved or expanded to cover the employees, except licensed attorneys, of the office of district or criminal district attorney, the adult and juvenile probation officers and their assistants, personnel in the county auditor's office including all assistant county auditors, and all other employees of the county not included in the coverage of the system and not specifically exempted by Section 158.013 or Subchapter B.

(b) The commissioners court of an eligible county by order may call an election on the question of the expansion or dissolution of a county civil service system as provided by Subsection (a).

(c) Except as otherwise provided by this section, the election must be held in the manner provided for an election to create a county civil service system.

(d) The election must be held on the date of the general election for state and county officers.

(e) Each qualified voter of the county is entitled to vote at the election.

(f) The commissioners court shall order the ballot at the election to be printed to provide for voting for or against the proposition: "Keeping and expanding the county civil service system."

(g) The commissioners court shall declare the results and, if the proposition is approved by a majority of the qualified voters voting at the election, by order expand the coverage of the system as provided by Subsection (a). If the proposition is not so approved, the commissioners court by order shall dissolve the county civil service system. A copy of the order expanding or dissolving the system shall be placed in the minutes of the court's proceedings.