1 . AGRICULTURE - COMMON ORGANIZATION OF THE MARKETS - CEREALS - LEVY - CALCULATION - FACTORS TO BE TAKEN INTO CONSIDERATION - MARKETING COSTS - FLAT-RATE DETERMINATION THEREOF ( REGULATION NO 120/67/EEC OF THE COUNCIL , ART . 13 ( 1 )) 2 . AGRICULTURE - COMMON ORGANIZATION OF THE MARKETS - CEREALS - COMMON WHEAT AND SORGHUM - THRESHOLD PRICE - FIXING THEREOF - REGULATIONS ( EEC ) NOS 1173/75 AND 1427/74 OF THE COUNCIL - VALIDITY