19.—(1) Any person aggrieved by an order or decision of F28[the Authority] may appeal to the court and the court may annul or confirm, with or without modification, the order or decision.

(2) Whenever F28[the Authority] entertains a doubt as to any question of law or of fact arising in the course of registration under this Act, F29[it] may make an order referring the question to the court.

(3) In any proceeding under this section the court shall, if so requested by F28[the Authority], and may in any case, if necessary, appoint a guardian or other person to represent any infant, person of unsound mind, person absent from the State, unborn person or person as to whom it is not known whether he is alive or dead; and, if satisfied that the interests of any person so represented are sufficiently protected by the representation, may make an order declaring that he shall be conclusively bound by the decision of the court and thereupon he shall, subject to the right under this Act to appeal on special leave, be bound accordingly, as if he were a party.