All countries, particularly in the territory of former Yugoslavia, had to co-operate with the International Criminal Tribunal for the former Yugoslavia established in Resolution 827 (1993) and respond requests from the trial chamber. The parties, especially the Bosnian Serbs, were instructed not to destroy, alter, conceal or damage evidence of violations of international humanitarian law. Finally, the Secretary-General Boutros Boutros-Ghali was requested to keep the Security Council informed on a regular basis on the situation.