Article 15. The Chief Prosecutors shall individually, and acting in collaboration with one another, also undertake the following duties:
(a) investigation, collection, and production before or at the Trial of all necessary evidence,
(b) the preparation of the Indictment for approval by the Committee in accordance with paragraph (c) of Article 14 hereof,
(c) the preliminary examination of all necessary witnesses and of the Defendants,
(d) to act as prosecutor at the Trial,
(e) to appoint representatives to carry out such duties as may be assigned to them,
(f) to undertake such other matters as may appear necessary to them for the purposes of the preparation for and conduct of the Trial.
It is understood that no witness or Defendant detained by any Signatory shall be taken out of the possession of that Signatory without its assent.
IV. FAIR TRIAL FOR DEFENDANTS
Article 16. In order to ensure fair trial for the Defendants, the following procedure shall be followed: