Changes made by Commission Regulation (EC) No 504/97 of 19 March 1997 laying down detailed rules for the application of Council Regulation (EC) No 2201/96 as regards the system of production aid for products processed from fruit and vegetables (repealed): Commission Regulation (EEC) No 1558/91 of 7 June 1991 laying down detailed rules for the application of the system of production aid for products processed from fruit and vegetables