64. No member of the Executive Council shall take part in its proceedings (other than proceedings for the purposes of this section) unless he or she has made and subscribed the oath of secrecy before the Governor or some other person authorised for that purpose by the Governor, acting in his or her discretion; and no other person shall take part in the proceedings of the Council (other than proceedings as aforesaid) unless he or she has so made and subscribed the oath of secrecy; but the Executive Council may exempt any person who is not a member of it from this requirement.