Acting under Chapter VII of the United Nations Charter, the Council stressed the importance of all states complying with measures imposed against UNITA in previous Security Council resolutions. The Secretary-General Kofi Annan was required to establish a monitoring mechanism consisting of up to five experts to investigate alleged violations of the sanctions against UNITA for a period of six months.[4] They were instructed to provide a report on their findings by 18 October 2000 with a view to improving the measures.