reg 34 Preliminary proceedings in chambers without notice to defendant
(1) On application by the Director, the judge advocate for any preliminary proceedings may direct that the proceedings are, or that any part of the proceedings is— (a) where there is one defendant, to be held in his absence and without notice to him; (b) where there are two or more defendants, to be held in the absence of both or all of them and without notice to any of them. (2) The court may not make a decision required by section 279(1) (consideration of trial by Court Martial) at a preliminary proceeding where a judge advocate has made a direction under this rule.