Tex. Spec. Dist. Local Laws Code § 1072.027

Not later than the date the terms of the initial elected directors expire, the initial elected board shall adopt a procedure for the election of directors under Section 1072.051. The procedure must provide for appropriate representation of the residents of the district and must provide for the first election of permanent directors to occur on the first uniform election date in May that occurs at the end of the initial directors' terms.