Commission Regulation (EEC) No 3202/76 of 21 December 1976 derogating in respect of the countries of the Central American Common Market from Articles 1, 6 and 13 of Commission Regulation (EEC) No 3200/76 of 21 December 1976 on the definition of the concept of originating products for purposes of the application of tariff preferences granted by the European Economic Community in respect of certain products from developing countries