Texas Statutes
Chapter 162 - Regulating Participation in Party Affairs
Section 162.012. Ineligibility to Affiliate With Another Party

Sec. 162.012. INELIGIBILITY TO AFFILIATE WITH ANOTHER PARTY. A person who is affiliated with a political party is ineligible to become affiliated with another political party during the same voting year.
Acts 1985, 69th Leg., ch. 211, Sec. 1, eff. Jan. 1, 1986.