Tex. Occ. Code § 2035.051
Not later than the 30th day after the date the result of the election is declared, any qualified voter of the county may contest the election by filing a petition in the district court of the county.
Added by Acts 2017, 85th Leg., R.S., Ch. 963 (S.B. 1969), Sec. 1.01, eff. April 1, 2019.