Changes made by Council Regulation (EC) No 3668/93 of 20 December 1993 extending into 1994 the application of Regulation (EEC) No 3917/92 applying generalized tariff preferences for 1994 in respect of certain products originating in developing countries, and adding to the list of beneficiaries of such preferences: Council Regulation (EEC) No 3835/90 of 20 December 1990 amending Regulations (EEC) No 3831/90, (EEC) No 3832/90 and (EEC) No 3833/90 in respect of the system of generalized tariff preferences applied to certain products originating in Bolivia, Colombia, Ecuador and Peru