Tex. Elec. Code § 144.006
(a) Except as otherwise provided by law, a declaration of write-in candidacy must be filed not later than 5 p.m. of the fifth day after the date an application for a place on the ballot is required to be filed in an election in which:
Added by Acts 2003, 78th Leg., ch. 1316, Sec. 35, eff. Sept. 1, 2003.
Acts 2005, 79th Leg., Ch. 1109 (H.B. 2339), Sec. 6, eff. September 1, 2005.
Acts 2011, 82nd Leg., R.S., Ch. 1318 (S.B. 100), Sec. 19, eff. September 1, 2011.
Acts 2015, 84th Leg., R.S., Ch. 84 (S.B. 1703), Sec. 11, eff. September 1, 2015.