(1) The acts of a person acting as a director are valid notwithstanding that it is afterwards discovered -
(a) that there was a defect in his appointment;
(b) that he was disqualified from holding office;
(c) that he had ceased to hold office;
(d) that he was not entitled to vote on the matter in question.
(2) This applies even if the resolution for his appointment is void under section 160 (appointment of directors of public company to be voted on individually).