Texas Election Code - ELEC § 501.155. Election Contest

(a) The enforcement of local option laws in the political subdivision in which an election is being contested is not suspended during an election contest.

(b) The result of an election contest finally settles all questions relating to the validity of that election.  A person may not call the legality of that election into question again in any other suit or proceeding.

(c) If an election contest is not timely instituted, it is conclusively presumed that the election is valid and binding in all respects on all courts.