1 . COMPETITION - DOMINANT POSITION - MARKET IN QUESTION - MARKET FOR SPARE PARTS - DEFINITION ( EEC TREATY , ART . 86 ) 2 . COMPETITION - DOMINANT POSITION - CONCEPT ( EEC TREATY , ART . 86 ) 3 . COMPETITION - AGREEMENTS AND DOMINANT POSITION - EFFECTS ON TRADE BETWEEN MEMBER STATES - CONDITION FOR THE APPLICATION OF COMMUNITY RULES ( EEC TREATY , ARTS . 85 AND 86 ) 4 . COMPETITION - DOMINANT POSITION - ABUSE - EFFECTS ON TRADE BETWEEN MEMBER STATES - CONDITION - ACTUAL OR POTENTIAL EXISTENCE OF NORMAL PATTERN OF TRADE BETWEEN THE MEMBER STATES ( EEC TREATY , ART . 86 )