1 . COMMUNITY LAW - PRINCIPLES - NON-RETROACTIVITY OF REGULATIONS - EXCEPTIONS - CONDITIONS ( EEC TREATY , ART . 191 ) 2 . AGRICULTURE - COMMON ORGANIZATION OF THE MARKETS - PRODUCTS PROCESSED FROM FRUIT AND VEGETABLES - PRODUCTION AID - RETROACTIVELY MADE SUBJECT TO COMPLIANCE WITH A TIME-LIMIT FOR THE FORWARDING OF THE PROCESSING CONTRACTS WHICH COINCIDED WITH THE TIME-LIMIT FIXED FOR THEIR SIGNATURE - PROTECTION OF LEGITIMATE EXPECTATIONS - EQUAL TREATMENT - BREACH OF THOSE PRINCIPLES ( COMMISSION REGULATION NO 2546/80 , ART . 1 )