++++ 1 . PRELIMINARY RULINGS - JURISDICTION OF THE COURT - LIMITS ( EEC TREATY, ARTICLE 177 ) 2 . MEASURES ADOPTED BY AN INSTITUTION - REGULATIONS - DIRECT EFFECT - INDIVIDUAL RIGHTS - PROTECTION BY NATIONAL COURTS ( EEC TREATY, ARTICLE 189 ) 3 . MEASURES ADOPTED BY AN INSTITUTION - REGULATIONS - EFFECTS - LEGISLATIVE MEASURES INCOMPATIBLE WITH PROVISIONS OF REGULATIONS - NOT PERMITTED ( EEC TREATY, ARTICLE 189 ) 4 . AGRICULTURE - COMMON ORGANIZATION OF THE MARKET - PIGMEAT - IMPORTATION - CHARGES HAVING EQUIVALENT EFFECT - CONCEPT - SCOPE ( REGULATION NO 20 OF THE COUNCIL, ARTICLES 14 AND 18 ) 5 . AGRICULTURE - COMMON ORGANIZATION OF THE MARKET - PIGMEAT - CUSTOMS DUTIES AND CHARGES HAVING EQUIVALENT EFFECT - ABOLITION - ENTRY INTO FORCE ( REGULATION NO 20 OF THE COUNCIL, ARTICLES 14 AND 18; REGULATION NO 121/67 OF THE COUNCIL, ARTICLES 17 AND 19 )