1 . AGRICULTURE - COMMON ORGANIZATION OF THE MARKETS - FRUIT AND VEGETABLES - ADOPTION OF PROTECTIVE MEASURES APPLICABLE TO IMPORTS OF PRESERVED MUSHROOMS - REGULATION NO 1102/78 - PURSUIT OF OBJECTIVES OF THE COMMON COMMERCIAL POLICY - PERMISSIBILITY ( EEC TREATY , ART . 39 , ART . 40 ( 3 ), SECOND SUBPARAGRAPH , AND ART . 110 ; COMMISSION REGULATION NO 1102/78 ) 2 . EEC - EXTERNAL RELATIONS - PRINCIPLE OF NON-DISCRIMINATION - ABSENCE - RELATIVE DIFFERENCE IN TREATMENT OF COMMUNITY TRADERS - PERMISSIBILITY - CONDITIONS ( EEC TREATY , ART . 40 ( 3 ), SECOND SUBPARAGRAPH ) 3 . COMMON COMMERCIAL POLICY - ALTERATION IN COMMERCIAL RELATIONS WITH NON-MEMBER COUNTRIES - MARGIN OF DISCRETION OF COMMUNITY INSTITUTIONS - PROTECTION OF LEGITIMATE EXPECTATION - LIMITS ( EEC TREATY , ART . 113 )