Cal. Sts. & High. Code § 26110

The commission shall be the governing body of the district, and shall exercise all of the powers which are vested in the district. At its first meeting or as soon thereafter as may be practicable, the commission shall choose one of its members as president, and another of its members as secretary. All written documents shall be signed in the name of the district by the president of the commission, and countersigned by the secretary.