Commission Regulation (EEC) No 3578/82 of 23 December 1982 amending for the third time Regulation (EEC) No 263/81 laying down detailed rules for the application of the import arrangements provided for by Regulations (EEC) No 217/81 and (EEC) No 218/81 in the beef and veal sector, and amending for the sixth time Regulation (EEC) No 2377/80