Requests the Secretary-General to submit to the Council as soon as possible a further report on options for the deployment of international observers to monitor effectively the implementation of the relevant Security Council resolutions, to be drawn from the United Nations and, if appropriate, from Member States acting nationally or through regional organizations and arrangements, on the borders of the Republic of Bosnia and Herzegovina, giving priority to the border between the Republic of Bosnia and Herzegovina and the Federal Republic of Yugoslavia (Serbia and Montenegro) and taking into account developments since his report of 21 December 1992 as well as the differing circumstances affecting the various sectors of the borders and the need for appropriate coordination mechanisms;