Premise: As to who mandates, I do not think I can do any better in answering that question succinctly than to quote the Secretary-General of the United Nations who has appealed to the international community to restore the UN Security Council to what he has called its "pre-eminent position as the sole source of legitimacy on the use of force."
Hypothesis: Thanks to the efforts of the general they wish to bring back the security council as that is thought to be best by him