(a) If the commissioners courts of all counties in the proposed district grant the petition's request for creation of the district, the commissioners court of the county with the greatest population shall appoint three temporary directors and the commissioners court of each other county in the proposed district shall appoint two temporary directors who shall serve until their successors are elected and have qualified for office.
(b) Within 15 days after the date of appointment, each director shall take the oath of office.
(c) If a director appointed by a commissioners court fails to qualify or a vacancy occurs in the office of director, the commissioners court that appointed that director shall appoint another person to fill the vacancy for the unexpired term.