Requests that every 30 days and no fewer than ten days before the expiration of the period referred to in paragraph 1 above the Secretary-General submit to the Security Council for its review a report as to whether the Co-Chairmen of the ICFY Steering Committee, on the basis of information made available to them from the ICFY Mission and all other available sources deemed relevant by the ICFY Mission, certify that the authorities of the Federal Republic of Yugoslavia (Serbia and Montenegro) are implementing their decision to close the international border, on land and in the air, between the Federal Republic of Yugoslavia (Serbia and Montenegro) and the Republic of Bosnia and Herzegovina with respect to all goods, except foodstuffs, medical supplies and clothing for essential humanitarian needs, and are complying with the requirements of paragraph 3 of resolution 970 (1995) in respect of all shipments across the international border between the Federal Republic of Yugoslavia (Serbia and Montenegro) and the Republic of Bosnia and Herzegovina; and inform the Council in his report if the Co-Chairmen of the ICFY Steering Committee have received substantiated evidence, from sources deemed relevant by the ICFY Mission, of substantial transshipments of goods, except foodstuffs, medical supplies and clothing for essential humanitarian needs, from the Federal Republic of Yugoslavia (Serbia and Montenegro) through the Republic of Croatia to the areas of the Republic of Bosnia and Herzegovina under the control of Bosnian Serb forces in violation of earlier relevant resolutions;