Commission Regulation (EC) No 1504/96 of 29 July 1996 laying down detailed rules for the application of Council Regulation (EC) No 1357/96 providing for additional payments to be made in 1996 with the premiums referred to in Regulation (EEC) No 805/68 on the common organization of the market in beef and veal and amending that Regulation, and amending Regulation (EEC) No 3886/92 laying down detailed rules for the application of the premium schemes provided for in the beef and veal sector as regards the processing premium