1 . COMPETITION - AGREEMENTS , DECISIONS AND CONCERTED PRACTICES - AGREEMENTS BETWEEN UNDERTAKINGS - AUTOMATIC NULLITY - EFFECTS ON THOSE PARTS OF THE AGREEMENT WHICH ARE NOT INCOMPATIBLE WITH ARTICLE 85 ( 1 ) - MATTER FOR THE NATIONAL COURT TO DECIDE - APPLICATION OF NATIONAL LAW ( EEC TREATY , ART . 85 ( 1 ) AND ( 2 )) 2 . COMPETITION - AGREEMENTS , DECISIONS AND CONCERTED PRACTICES - PROHIBITION - EXEMPTION BY CATEGORIES - REGULATION NO 123/85 - PURPOSE AND SCOPE ( EEC TREATY , ART . 85 ( 1 ) TO ( 3 ); COMMISSION REGULATION NO 123/85 )