United Nations Security Council resolution 631, adopted unanimously on 8 February 1989, after recalling resolutions 598 (1987) and 618 (1988) and having considered a report by the Secretary-General Javier Pérez de Cuéllar on the United Nations Iran–Iraq Military Observer Group, the Council decided:

(a) to call on both Iran and Iraq to implement Resolution 598;

(b) to renew the mandate of the United Nations Iran–Iraq Military Observer Group for another seven months and twenty-two days until 30 September 1989;

(c) to request the Secretary-General to report on the situation and the measures taken to implement Resolution 598 at the end of this period.

• Iran–Iraq relations
• Iran–Iraq War
• List of United Nations Security Council Resolutions 601 to 700 (1987–1991)

• Text of the Resolution at undocs.org

• Works related to United Nations Security Council Resolution 631 at Wikisource