1 . AGRICULTURE - COMMON ORGANIZATION OF THE MARKET - PIGMEAT - PROVISIONS OF THE TREATY ON AIDS GRANTED BY STATES - APPLICABILITY - CONDITIONS ( EEC TREATY , ARTS . 92 TO 94 ; REGULATION NO 2759/75 OF THE COUNCIL , ART . 21 ) 2 . AGRICULTURE - COMMON ORGANIZATION OF THE MARKET - MEMBER STATES - UNDERMINING COMMUNITY RULES - PROHIBITION ( EEC TREATY , ART . 40 ) 3 . AGRICULTURE - COMMON ORGANIZATION OF THE MARKET - PIGMEAT - PRINCIPLES - FREEDOM OF INTRA-COMMUNITY TRADE - MEMBER STATES - UNILATERAL INTERVENTION - PROHIBITION ( REGULATION NO 2759/75 OF THE COUNCIL ) 4 . AGRICULTURE - COMMON ORGANIZATION OF THE MARKET - PIGMEAT - MEMBER STATES - CONFERMENT OF SPECIAL ADVANTAGES ON NATIONAL PRODUCERS - EXPORT SUBSIDY - PROHIBITION ( REGULATION NO 2759/75 OF THE COUNCIL , ART . 15 ( 2 )) 5 . AGRICULTURE - COMMON ORGANIZATION OF THE MARKET - PIGMEAT - PRINCIPLES - OPEN MARKET - EXHAUSTIVE RULES ( REGULATION NO 2759/75 OF THE COUNCIL ) 6 . AGRICULTURE - COMMON ORGANIZATION OF THE MARKET - PIGMEAT - NATIONAL MARKETING SCHEME - PROHIBITION - CRITERIA ( REGULATION NO 2759/75 OF THE COUNCIL ) 7 . COMMUNITY LAW - PRINCIPLES - DIRECT EFFECT - NATIONAL LEVY INCOMPATIBLE WITH COMMUNITY LAW - IMPOSSIBILITY OF RECOVERING 8 . AGRICULTURE - COMMON ORGANIZATION OF THE MARKET - PRECEDENCE OVER GENERAL RULES OF TREATY - SYSTEM OF STATE MONOPOLIES OF A COMMERCIAL CHARACTER - INAPPLICABILITY ( EEC TREATY , ARTS . 37 AND 38 ( 2 )) 9 . COMMUNITY LAW - PRINCIPLES - DIRECT EFFECT - NATIONAL LEVY INCOMPATIBLE WITH COMMUNITY LAW - RIGHT TO REIMBURSEMENT - ARRANGEMENTS FOR SECURING - DISCRETION OF NATIONAL COURT