3(1)Subject to the provisions of this paragraph, the court shall sit in open court and in the presence of the accused.
(2)The court may exclude members of the public from the trial of a person under 17 years of age or direct that the trial of such a person shall only be reported to such extent as may be specified in the direction.
(3)The court may sit in camera on the ground that it is necessary or expedient in the interests of the administration of justice to do so ; and without prejudice to that power the court may order that, subject to any exceptions the court may specify, the public shall be excluded from all or any part of the proceedings of the court if it appears to the court that any evidence to be given or statements to be made in the course of the proceedings or that part, as the case may be, might otherwise lead to the disclosure of any information which would or might be directly or indirectly useful to an enemy.
(4)The court may sit in closed court while deliberating on its finding or sentence or during any other deliberation among its members, but finding and sentence shall in all cases be announced in open court and in the presence of the accused.