3(1)A director may resign his office by notice in writing to Associated British Ports.
(2)The office of director is vacated if the director—
(a)becomes bankrupt or makes an arrangement with his creditors, or in Scotland has his estate sequestrated or makes a trust deed for behoof of his creditors or a composition contract; or
(b)becomes of unsound mind ; or
(c)is absent from meetings of the directors for a period of more than six months without the permission of the directors.