If, in the case of an appeal under this Part of this Act, the Attorney General, upon an application in that behalf made to him within a period of fourteen days from the date when the decision of the Court was given, grants to the appellant or to the Admiralty, the Army Council or the Air Council a certificate that the decision of the Court involves a point of law of exceptional public importance and that it is desirable in the public interest that a further appeal should be brought, an appeal to the House of Lords from the decision of the Court shall lie at the instance of the person or authority to whom the certificate is granted ; but subject to the foregoing provisions of this subsection the determination by the Court of any appeal or other matter which they have power to determine shall be final, and no appeal shall lie from the Court to any other court.

Where the Court have allowed an appeal and, immediately after the decision of the Court has been given, notice is given to the Court on behalf of the Admiralty, the Army Council or the Air Council of their intention to apply to the Attorney General for such a certificate as aforesaid, the Court may make an order providing for the detention of the appellant or directing that he shall not be released except on bail until either the Attorney General has refused to grant the certificate or a decision on the appeal has been given by the House of Lords or the appeal has been abandoned, as the case may be.