Commission Regulation (EEC) No 3750/83 of 23 December 1983 derogating in respect of the countries of the Association of South-East Asian Nations from Articles 1, 7 and 13 of Regulation (EEC) No 3749/83 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