Commission Regulation (EEC, ECSC) No 3031/92 of 21 October 1992 amending Regulation (EEC, ECSC) No 2725/92 concerning the implementation of Council Regulation (EEC) No 2656/92 and Decision 92/470/ECSC concerning certain technical modalities in connection with the application of respectively Regulation (EEC) No 1432/92 and Decision 92/285/ECSC prohibiting trade between the European Economic Community and the European Coal and Steel Community on the one hand, and the Republics of Serbia and Montenegro on the other hand