Texas Election Code - ELEC § 64.012. Illegal Voting

(1) votes or attempts to vote in an election in which the person knows the person is not eligible to vote;

(2) votes or attempts to vote more than once in an election;

(3) votes or attempts to vote a ballot belonging to another person, or by impersonating another person;

(4) marks or attempts to mark any portion of another person's ballot without the consent of that person, or without specific direction from that person how to mark the ballot; or

(5) votes or attempts to vote in an election in this state after voting in another state in an election in which a federal office appears on the ballot and the election day for both states is the same day.