28. Removal and resignation of member.

(a) is, or has become subject to any of the disqualifications mentioned in section 27;
(b) has been guilty of misconduct in discharge of his duties;
(c) has become physically or mentally incapable of discharging his duties as a member,
(d) has so abused his position as to render his continuance in office prejudicial to the public interest; or
(e) has, without reasonable cause, refused or failed to perform his duties for a period of not less than three months: