Charter - V : Powers of the tribunal and conduct of the trial - Art. 18.
Art. 18. The Tribunal shall:
(a) confine the Trial strictly to an expeditious hearing of the issues raised by the charges,
(b) take strict measures to prevent any action which will cause unreasonable delay, and rule out irrelevant issues and statements of any kind whatsoever,
(c) deal summarily with any contumacy, imposing appropriate punishment, including exclusion of any Defendant or his Counsel from some or all further proceedings, but without prejudice to the determination of the charges.