++++ 1 . AGRICULTURE - COMMON ORGANIZATION OF THE MARKET - CEREALS - FREE-AT-FRONTIER PRICE - CALCULATION ( REGULATION NO 89 OF THE COMMISSION, ARTICLES 2 AND 4 ) 2 . AGRICULTURE - COMMON ORGANIZATION OF THE MARKET - CEREALS - LEVY - RATES - FIXING - EFFECT OF EXCHANGE RATES - VARIATION - LIMITS - EXCEEDING SUCH LIMITS - EVIDENCE OF SERIOUS DISTURBANCE - ABSENCE ( REGULATION NO 67 OF THE COMMISSION )