12. The validity of any proceedings of INI, or of any of its committees, shall not be affected by—N.I.
(a)any vacancy among the members of INI or of members of the committee;
(b)any vacancy in the office of the chairman or deputy chairman of INI;
(c)any defect in the appointment of any one or more members or of the chairman or deputy chairman of INI; or
(d)any failure to comply with paragraph 11.