1 . APPLICATION FOR A DECLARATION OF NULLITY - NATURAL OR LEGAL PERSONS - MEASURES OF DIRECT AND INDIVIDUAL CONCERN TO THEM - ADMISSIBILITY ( EEC TREATY , ART . 173 , SECOND PARAGRAPH ; COUNCIL REGULATION NO 1111/77 , ART . 9 ( AS AMENDED BY REGULATION NO 1293/79 ) AND ANNEX II ) 2 . PROCEDURE - INTERVENTION - RIGHT WHICH ALL INSTITUTIONS OF THE COMMUNITY HAVE - CONDITIONS FOR ITS EXERCISE - INTEREST IN TAKING PROCEEDINGS - UNNECESSARY CONDITION ( STATUTE OF THE COURT OF JUSTICE OF THE EEC , ART . 37 , FIRST PARAGRAPH ) 3 . AGRICULTURE - RULES ON COMPETITION - CONDITIONS OF APPLICATION - DISCRETION OF THE COUNCIL ( EEC TREATY , ART . 42 ) 4 . AGRICULTURE - COMMON ORGANIZATION OF THE MARKETS - DISCRIMINATION BETWEEN PRODUCERS OR CONSUMERS WITHIN THE COMMUNITY - CONCEPT ( EEC TREATY , ART . 40 ( 3 )) 5 . MEASURES ADOPTED BY THE INSTITUTIONS - PROCEDURE FOR WORKING THEM OUT - DUE CONSULTATION OF THE PARLIAMENT - ESSENTIAL FORMALITY - SCOPE ( EEC TREATY , ART . 43 ( 2 ), THIRD SUBPARAGRAPH , AND ART . 173 )