Texas Health and Safety Code - HEALTH & SAFETY § 286.029. Overlapping Districts

(a) If the territory in one or more districts overlaps, the commissioners court of the county in which the most recently created district is located by order shall exclude the overlapping territory from that district.

(b) For purposes of this section, a district is created on the date the election approving its creation was held.  If the elections approving the creation of two or more districts are held on the same date, the most recently created district is the district for which the hearing required by Section 286.023 was most recently held.

(c) The fact that a district is created with boundaries that overlap the boundaries of another district does not affect the validity of either district.