Tex. Transportation Code § 452.717

(a) In each unit of election in which a majority of the votes received in the unit favor the proposition, the authority is confirmed and continues inclusive of each of those units, except that the authority ceases in every unit of election in a subregion if the authority is not confirmed:

(1) in the principal municipality of the subregion; or

(2) in contiguous units of election in the subregion in which the population when aggregated in all those units exceeds 300,000.

(b) The interim executive committee may exclude from the authority and proposed tax a unit of election because the unit is not contiguous to the existing authority and would create a fiscal hardship on the authority. The committee shall notify the appropriate governing body in writing that the unit is excluded under this subsection.

(c) If the authority continues, the interim executive committee shall record the results in its minutes and adopt an order:

(1) declaring that the creation of the authority is confirmed;

(2) describing the territory of the authority;

(3) stating the date of the election;

(4) containing the proposition;

(5) showing the number of votes cast for or against the proposition in each unit of election; and

(6) showing the number of votes by which the proposition was approved in each unit of election in which the proposition was approved.

(d) The order must be accompanied with a map of the authority that shows the boundaries of the authority.

(e) A certified copy of the order and map shall be filed with:

(1) the Texas Department of Transportation; and

(2) the comptroller.

(f) If the authority does not continue, the interim executive committee shall enter an order declaring that the result of votes cast at the election is that the authority ceases in its entirety. The order shall be filed with the Texas Department of Transportation and the comptroller, and the authority is dissolved.