Western Sahara has been on the United Nations list of non-self-governing territories since 1963 after a Moroccan demand, when it was a Spanish colony. In 1966, the UN called on Spain directly for the first time to decolonize the territory. 10/04/2008
The United Nations Mission for the Referendum in Western Sahara (MINURSO) was established by Security Council resolution 690 of 29 April 1991 in accordance with settlement proposals accepted on 30 August 1988 by Morocco and the Frente Popular para la Liberación de Saguia el-Hamra y de Río de Oro (Frente POLISARIO).
The settlement plan, as approved by the Security Council, provided for a transitional period for the preparation of a referendum in which the people of Western Sahara would choose between independence and integration with Morocco. The Special Representative of the Secretary-General was to have sole and exclusive responsibility over matters relating to the referendum and was to be assisted in his tasks by an integrated group of civilian, military and civilian police personnel, to be known as the United Nations Mission for the Referendum in Western Sahara.