(a) Except as provided by Subsection (b), a vacancy on the board shall be filled by appointment to the unexpired term by the remaining directors.
(b) The City Council of the City of Irving shall appoint directors to fill all vacancies on the board if the number of qualified directors is less than four.
(c) If any director ceases to possess the qualifications prescribed by Section 7803.052, the remaining directors shall declare the person's office vacant and appoint a successor.