| Number: | 658 |
| Organ: | SC |
| Date: | 27 June |
| Year: | 1990 |
| Meeting: | 2,929 |
| Code: | S/RES/658 |
| Document: | https://undocs.org/S/RES/658(1990) |
| For: | 15 |
| Abstention: | 0 |
| Against: | 0 |
| Subject: | Western Sahara |
| Result: | Adopted |
United Nations Security Council resolution 658, adopted unanimously on 27 June 1990, after recalling Resolution 621 (1988) and noting a report by the Secretary-General on the situation in Western Sahara, the Council approved the Secretary-General's recommendations regarding a settlement of the issue.
Though not established until Resolution 690 (1991), the agreement arising from Resolution 658 concerned a plan whereby the United Nations would supervise a ceasefire between Morocco and the Polisario Front and conduct a referendum in which the people of Western Sahara would decide between self-determination or integration with Morocco that later became known as the United Nations Mission for the Referendum in Western Sahara. Secretary-General Javier Pérez de Cuéllar described the plan as "large and complicated".[1] This was proposed after the 1988 Settlement Plan agreement between Morocco and the Polisario Front.
The resolution called upon both parties to co-operate with the Secretary-General and the Organisation of African Unity in their efforts to find a settlement in Western Sahara, welcoming the Secretary-General's decision to send a technical mission to Western Sahara and neighbouring countries to finalise administrative aspects of the United Nations plan. In this regard, it called on the Secretary-General to report back once this had been completed.