(a) The board consists of seven directors elected as follows:
(1) two directors elected from County Commissioners Precinct 3 by the voters of that precinct;
(2) two directors elected from County Commissioners Precinct 4 by the voters of that precinct; and
(3) three directors elected from the district at large by the voters of the entire district.
(b) Directors serve staggered two-year terms unless four-year terms are established under Section 285.081, Health and Safety Code.