Supreme Court Act 1981
S.31(1) An application to the High Court for one or more of the following forms of relief, namely((a) an order of mandamus, prohibition or certiorari shall be made in accordance with rules of court by a procedure to be known as an application for judicial review....
S 31(3) No application for judicial review shall be made unless the leave of the High Court has been obtained in accordance with rules of court; and the court shall not grant leave to make such an application unless it considers that the applicant has a sufficient interest in the matter to which the application relates.