Tex. Water Code § 51.749

(a) After the board of the original district has agreed on the terms and conditions of division, which shall include a plan for the payment of any outstanding current obligations and performance of any outstanding obligations of the original district, and has prepared a metes and bounds description of the proposed districts, it shall order an election to be held in the district to determine whether the original district should be divided as proposed.

(b) The board of the original district shall order the election to be held and shall give notice of the election at least 20 days prior to the election in the manner provided by law for other elections.

(c) The original district shall be divided if a majority of the qualified electors in the original district vote in favor of the division. The resulting districts shall be assigned consecutive letters, corresponding to the number of the original district. For example, Harris County WCID #1 if divided into two districts shall become Harris County WCID #1A and Harris County WCID #1B. No other confirmation election shall be necessary. Provided, however, each resulting district desiring to issue bonds payable wholly or partially from ad valorem taxes shall be required to obtain authorization for the issuance of such bonds by a majority vote of the resident electors of such district voting in an election called for that purpose. Notice of such election shall be given as generally set forth for bond elections in this chapter. Each resulting district desiring to levy a maintenance tax shall be required to obtain authorization by a majority vote of the qualified resident electors of such district voting in an election called for that purpose. Notice of such election shall be given as generally set forth for such elections in this chapter.