(_f_) A defendant may apply in writing to the tribunal for the production of witnesses or of documents. The application shall state where the witness or document is thought to be located and shall also state the facts to be proved by the witness or the document and the relevancy of such facts to the defense. If the tribunal grants the application, the defendant shall be given such aid in obtaining production of evidence as the tribunal may order. Article V The tribunals shall have the power (_a_) to summon witnesses to the trial, to require their attendance and testimony and to put questions to them; (_b_) to interrogate any defendant who takes the stand to testify in his own behalf, or who is called to testify regarding another defendant; (_c_) to require the production of documents and other evidentiary material; (_d_) to administer oaths; (_e_) to appoint officers for the carrying out of any task designated by the tribunals including the taking of evidence on commission; (_f_) to adopt rules of procedure not inconsistent with this Ordinance. Such rules shall be adopted, and from time to time as necessary, revised by the members of the tribunal or by the committee of presiding judges as provided in Article XIII. Article VI The tribunals 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 the exclusion of any defendant or his counsel from some or all further proceedings, but without prejudice to the determination of the charges. Article VII The tribunals shall not be bound by technical rules of evidence. They shall adopt and apply to the greatest possible extent expeditious and non-technical procedure, and shall admit any evidence which they deem to have probative value. Without limiting the foregoing general rules, the following shall be deemed admissible if they appear to the tribunal to contain information of probative value relating to the charges: affidavits, depositions, interrogations, and other statements, diaries, letters, the records, findings, statements and judgments of the military tribunals and the reviewing and confirming authorities of any of the United Nations, and copies of any document or other secondary evidence of the contents of any document, if the original is not readily available or cannot be produced without delay. The tribunal shall afford the opposing party such opportunity to question the authenticity or probative value of such evidence as in the opinion of the tribunal the ends of justice require. Article VIII