++++ 1 . Competition - Cartels - Interference with competition - Criteria for assessment - Agreement fixing common prices - Agreement intended to restrict competition - Agreement not observed - Not relevant ( EEC Treaty, Art . 85 ( 1 )) 2 . Competition - Cartels - Interference with trade between Member States - Agreement covering the market of a single Member State - Agreement providing for a common defence against foreign competition ( EEC Treaty, Art . 85 ( 1 )) 3 . Competition - Community rules - Infringements - Committed deliberately - Concept ( Regulation No 17, Art . 15 ) 4 . Acts of the institutions - Statement of reasons - Obligation - Scope - Decision to apply competition rules ( EEC Treaty, Art . 190 )