It shall be the duty of the Ministers to satisfy themselves, with respect to any person whom they propose to appoint to be a member of the Commission, that that person will have no such financial or commercial interest as is likely to affect him in the discharge of his functions as a Commissioner, and also to satisfy themselves from time to time, with respect to any person who is a member of the Commission, that he has no such interest as aforesaid; and any such person shall, whenever requested by the Ministers so to do, furnish to them such information as they consider necessary for the performance of their duty under this paragraph.