(1)On an application for a declaration under section 58 the court may at any stage of the proceedings, of its own motion or on the application of any party to the proceedings, direct that all necessary papers in the matter be sent to the Attorney General.
(2)The Attorney General, whether or not he is sent papers in relation to an application for a declaration under section 58, may—
(a)intervene in the proceedings on that application in such manner as he thinks necessary or expedient, and
(b)argue before the court dealing with the application any question in relation to the application which the court considers it necessary to have fully argued.
(3)Where any costs are incurred by the Attorney General in connection with any application for a declaration under section 58, the court may make such order as it considers just as to the payment of those costs by parties to the proceedings.