Extends once more the stationing in Cyprus of UNFICYP established under resolution 186 (1964) for a further period ending on 15 Dec. 1991; requests the Secretary-General to continue his mission of good offices, to keep the Security Council informed of the progress made and to submit a report on the implementation of the present resolution by 30 Nov. 1991; calls upon all the parties concerned to continue to cooperate with the Force on the basis of the present mandate.