Changes made by Commission Regulation (EEC) No 3433/81 of 26 November 1981 laying down detailed rules for the application of Regulation (EEC) No 1796/81 as regards imports of preserved cultivated mushrooms originating in non-member countries and amending Regulation (EEC) No 950/68 on the Common Customs Tariff: Regulation (EEC) No 2104/75 of the Commission of 31 July 1975 amending Regulation (EEC) No 193/75 and laying down special detailed rules for the application of the system of import licences and advance fixing certificates for products processed from fruit and vegetables