(a) A person may not be elected or appointed as a director unless the person is:
(1) a resident of the district;
(2) a registered voter; and
(3) more than 18 years of age at the time of election or appointment.
(b) A person who is elected from a commissioners precinct or who is appointed to fill a vacancy for a commissioners precinct must be a resident of that precinct.
(c) A district employee may not serve as a director.