18. Appeal to Court of Appeal from decision under section 17
The decision of the High Court under section 17 shall be final and no appeal shall lie from the decision of the High Court to the Court of Appeal in any case save with leave of the High Court, which leave shall only be granted where the High Court certifies that its decision involves a point of law of exceptional public importance and that it is desirable in the public interest that an appeal should be made to the Court of Appeal.