 They are allowed to trade rough diamonds with KPCS participants, but not with non-members.Reports submitted to the United Nations Security Council in October 2002 charge that both the Angolan rebel leader, Mr. Jonas Savimbi, and the Liberian government still violate the trade and weapons bans with the help of a global network of arms dealers, diamond merchants and natural resources companies.Other logistical issues continue to hinder the success of the KPCS.