1 . COMPETITION - AGREEMENTS - EXCLUSIVE PURCHASE AGREEMENTS CONCLUDED BETWEEN TWO UNDERTAKINGS IN A SINGLE MEMBER STATE - CHARACTERISTICS SET OUT IN ARTICLE 3 OF REGULATION NO 67/67 - ABSENCE - ADVERSE EFFECT ON TRADE BETWEEN MEMBER STATES - PROHIBITION - EXEMPTION BY CATEGORY ( REGULATION NO 67/67 OF THE COMMISSION , ARTICLE 1 ( 2 )) 2 . COMPETITION - NETWORK OF AGREEMENTS - CUMULATIVE EFFECT - REGULATION NO 67/67 - APPLICABILITY