The following persons shall be disqualified from being director—
(a)
an infant, that is, a person under the age of 18 years ;
(b)
a lunatic or person of unsound mind ;
(c)
a person suspended or removed under section 288 of this Act ;
(d)
a person disqualified under sections 279, 280, 284 of this Act ; and
(e)
a corporation other than its representative appointed to the board for a given term.