Texas Election Code - ELEC § 191.031. Party Holding Primary Election

(a) If a political party holding a primary election in a presidential election year desires to send delegates to a national presidential nominating convention of the party, the party shall select the delegates at a state convention convened on a date adopted by the state executive committee occurring in the presidential election year.  Before the date of the party's precinct conventions held under Chapter 174, the party's state executive committee shall choose the date, hour, and place for the state convention.

(b) The state convention shall consist of delegates selected at the party's county and senatorial district conventions held under Chapter 174.

(c) Before the date of the party's precinct conventions, the party's state chair shall post on the party's Internet website notice of the date, hour, and place for the state convention.