(a) If a majority of the voters in the area of more than one school district approve annexation, the board may appoint two directors who are residents of the annexed area to serve in addition to the six sitting directors, for a total of eight directors.
(b) If the board appoints two directors under Subsection (a), the board shall appoint:
(1) one director to serve until the next regular election of directors following appointment; and
(2) one director to serve until the election of directors following the next regular election of directors.
(c) During any time the board is composed of eight directors, a concurrence of five is sufficient in any matter relating to district business.