Changes made by Commission Regulation (EEC) No 1994/84 of 12 July 1984 amending for the sixth time Regulation (EEC) No 3183/80 laying down common detailed rules for the application of the system of import and export licences and advance fixing certificates for agricultural products and amending several Regulations laying down special rules for the application of the system of import and export licences: Commission Regulation (EEC) No 3034/82 of 16 November 1982 amending Regulation (EEC) No 2729/81 as regards the period to be observed in cases of advance fixing of the refund in connection with an invitation to tender in a non-member country in the milk and milk products sectoro