AGRICULTURE - COMMON ORGANIZATION OF THE MARKET - BEEF AND VEAL - TRADE WITH NON-MEMBER COUNTRIES - PRODUCTS ORIGINATING IN ACP STATES - REDUCTION OF IMPORT CHARGES - METHOD OF CALCULATION - FIXING OF A SINGLE RATE OF LEVY IN THE EXPORTING ACP STATE - DISCRIMINATION BETWEEN IMPORTERS IN THE COMMUNITY - NONE ( EEC TREATY , ART . 40 ( 3 ), SECOND PARAGRAPH ; REGULATION NO 3328/75 OF THE COUNCIL , ART . 1 ; REGULATION NO 3376/75 OF THE COMMISSION , ART . 4 AND COMMISSION REGULATION NO 932/77 )