any State or States, or as to the limits inter se of the Constitutional
   powers of any two or more States, unless the High Court shall certify
   that the Question is one which ought to be determined by Her Majesty in
   Council.

   The High Court may so certify if satisfied that for any special reason
   the certificate should be granted, and thereupon an appeal shall lie to
   Her Majesty in Council on the question without further leave.

   Except as provided in this section, this Constitution shall not impair
   any right which the Queen may be please to exercise by virtue of Her
   Royal prerogative to grant special leave of appeal from the High Court
   to Her Majesty in Council. The Parliament may make laws limiting the