Tex. Water Code § 62.313: OBLIGATIONS NOT AFFECTED; PRO RATA ASSUMPTION.

(a) Except as provided in Subsection (b) of this section, annexation shall in no way affect the bonded debt or any other valid outstanding obligation of the annexing district.

(b) If the voters at the annexation election in the county annexed vote to assume a pro rata part of the bonded debt of the annexing district, pro rata assumption shall be binding. If that proposition is not approved by a majority of those electors voting in the election, the persons and property within the county annexed shall never be bound to the payment of any debt of the annexing district outstanding at the time of annexation.

Acts 1971, 62nd Leg., p. 110, ch. 58, Sec. 1, eff. Aug. 30, 1971.