(a) A change in a county election precinct boundary takes effect on the first day of the first even-numbered voting year following the voting year in which the change is ordered.
(b) Except as provided by Subsection (c), for a boundary change under § 42.031(b), the commissioners court may order an earlier effective date than that prescribed by Subsection (a) if:
(1) an election for an officer of a territorial unit under § 42.005(a) is scheduled or may be scheduled to be held before the effective date of the change under Subsection (a) and the territorial unit contains the election precinct as changed; and
(2) the voter registrar has sufficient time to correct the registration records before the effective date of the change.

Terms Used In Texas Election Code 42.033


(c) A change in a county election precinct boundary may not take effect on a date occurring between the date of the general primary election and the date of the general election for state and county officers unless the change is necessary to:
(1) comply with § 42.005 after a boundary change made under Article V, § 18, of the Texas Constitution;
(2) include within a precinct a suitable building available for use as a polling place if no suitable building is available for that purpose within the existing precinct boundary; or
(3) comply with a court order.