Tex. Spec. Dist. Code § 8846.054
(a) To be eligible to be a candidate for or to serve as a director at large, a person must be a registered voter in the district and:
(b) To be eligible to be a candidate for or to serve as a director from a county commissioners precinct, a person must:
Added by Acts 2009, 81st Leg., R.S., Ch. 1139 (H.B. 2619), Sec. 1.05, eff. April 1, 2011.