++++ 1 . AGRICULTURE - COMMON ORGANIZATION OF THE MARKETS - CEREALS - BASE PRICE - FREE-AT-FRONTIER PRICE - CALCULATION - CRITERIA - DEROGATION - CONDITIONS ( REGULATION NO 19/62 OF THE COUNCIL, ARTS . 2 AND 9; REGULATION NO 86/62 OF THE COMMISSION, ART . 1 ) 2 . AGRICULTURE - COMMON ORGANIZATION OF THE MARKETS - CEREALS, FLOUR, GROATS AND MEAL - MOST REPRESENTATIVE MARKET - MEANING ( REGULATION NO 89 OF THE COMMISSION ) 3 . AGRICULTURE - COMMON ORGANIZATION OF THE MARKETS - CEREALS - LEVY - RATES - DETERMINING SUCH RATES - INCIDENCE OF EXCHANGE RATES - VARIATION - LIMITS - WIDER VARIATION NOT AN INDICATION OF SERIOUS DISTURBANCE ( REGULATION NO 67 OF THE COMMISSION )