(a) The board consists of six directors elected from the district at large unless the boundaries of the district are expanded under Subchapter G or H.
(b) Directors serve staggered two-year terms unless:
(1) the alternate terms provided by Section 1116.307, 1116.353, or 1116.354 apply; or
(2) four-year terms are established under Section 285.081, Health and Safety Code.