1 . AGRICULTURE - COMMON ORGANIZATION OF MARKETS - VARIATION OF RULES - PRINCIPLE OF PROTECTION OF LEGITIMATE EXPECTATION - APPLICATION - CONDITIONS AND LIMITS 2 . AGRICULTURE - MONETARY COMPENSATORY AMOUNTS - INTRODUCTION IN RESPECT OF DURUM WHEAT AND PRODUCTS DERIVED THEREFROM - COMMISSION REGULATION NO 2604/77 - VALIDITY 3 . AGRICULTURE - MONETARY COMPENSATORY AMOUNTS - INTRODUCTION IN RESPECT OF DURUM WHEAT AND PRODUCTS DERIVED THEREFROM - APPLICATION TO TRANSACTIONS IN COURSE OF EXECUTION ( COMMISSION REGULATION NO 2604/77 , AS AMENDED BY REGULATION NO 2792/77 )