FILING DEADLINE.
Tex. ELEC Code § 181.033.
in effect(a) Except as provided by Subsection (b), an application for nomination by a convention must be filed not later than the regular deadline for candidates to file applications for a place on the general primary ballot.
(b) A political party by rule may extend the filing deadline for applications for nomination for an office for which a candidate who has made an application withdraws, dies, or is declared ineligible.
Acts 2013, 83rd Leg., R.S., Ch. 1055 (H.B. 3103 ), Sec. 11, eff. June 14, 2013.