(1) Where any person disputes the decision of a proper officer acting in the course of duty under section 3 he may appeal therefrom to the Director General, whose decision on such dispute shall, subject to subsection (2), be final.

(2) Any person aggrieved by a decision of the Director General may, within thirty days of being notified of such decision, appeal to the Minister whose decision thereon shall be final and not be subject to review in any court.