§ "(1) The validity of an order made in pursuance of this Part of this Act shall not be called in question except in proceedings duly begun during the period of twenty-eight days from the day on which notice of the making of the order is first published in accordance with this Act.
§ (2) The court before whom any proceedings are duly taken for the purpose of questioning the validity of such an order as aforesaid may, upon application made by any party before the expiration of the said period of twenty-eight days, make an interim order directing that the order in question shall not come into operation before the final determination of the proceedings.
§ (3) In any such procedings as aforesaid no appeal shall, without the leave of the Court of Appeal or Court of Session, as the case may be, lie from that court to the House of Lords.
§ (4) Subject to the foregoing provisions of this section, every order made in pursuance of this Part of this Act shall come into operation at the end of the period of twenty-eight days from the day on which notice of the making of the order is first published in accordance with this Act and, subject as aforesaid, the making of the order shall be conclusive evidence that the requirements of 1380 this Act have been complied with, and that the order and the scheme (if any) approved thereby have been duly made and are within the powers conferred by this Act."—[The Attorney-General.]