++++ 1 . Competition - Public undertakings - Powers of the Commission - Adoption of directives and decisions within the meaning of Article 189 of the Treaty ( EEC Treaty, Arts 90 ( 3 ) and 189 ) 2 . Action for failure to fulfil obligations - Failure to comply with a Commission decision based on Article 90 ( 3 ) of the Treaty - Annulment of the decision not sought - Defences - Challenge to the lawfulness of the decision - Inadmissible - Limits - Non-existent measures ( EEC Treaty, Arts 169, 170, 173 and 175 )