2. If any person aggrieved by the direction desires to question the validity thereof, or of any provision contained therein, on the ground that it is not within the powers of the Department or that any requirement of this Schedule has not been complied with in relation to the direction, he may, within 6 weeks from the time when notice that the direction has been given is first published under paragraph 1, make an application to the High Court and on any such application the High Court—
(a)may by interim order suspend the operation of the direction or of any provision contained therein, either generally or in so far as it affects the applicant, until the final determination of the proceedings; and
(b)if satisfied that the direction or any provision contained therein is not within the powers of the Department, or that the interests of the applicant have been substantially prejudiced by any requirement of this Schedule not having been complied with, may quash the order or any provision contained therein, either generally or in so far as it affects the applicant.
3. Subject to the provisions of paragraph 2, the direction shall not, either before or after it has been made, be questioned in any legal proceedings whatsoever, and shall become operative on the expiration of 6 weeks from the date on which notice of the giving of the direction is first published under paragraph 1.