Acting under Chapter VII of the United Nations Charter, the Council established UNOCI for an initial period of twelve months from 4 April 2004 compromising of 6,240 United Nations personnel including 200 military observers and 320 police in addition to a civilian, judiciary and corrections component.[2][3] United Nations missions in West Africa were encouraged to provide support to UNOCI, while UNOCI was asked to co-operate with the United Nations Mission in Sierra Leone (UNAMSIL) and United Nations Mission in Liberia (UNMIL).