(a) A member is no longer qualified for appointment to the board;
(b) Misconduct, incompetence, neglect of official duties, malfeasance or inability to perform official duties due to incapacitation;
(c) Commission of a felony or violation of this chapter resulting in disciplinary action; or
(d) Unexcused failure to attend at least one-half (½) of the regularly scheduled meetings held in a calendar year.