1 . ACTION FOR ANNULMENT - MEASURES IN RESPECT OF WHICH AN ACTION MAY BE BROUGHT - COMMISSION DECISION ADOPTED IN CONNECTION WITH THE APPLICATION OF THE RULES ON COMPETITION AND REFUSING TO TREAT DOCUMENTS FURNISHED BY AN UNDERTAKING AS CONFIDENTIAL - INTEREST OF THE UNDERTAKING CONCERNED IN BRINGING AN ACTION ( EEC TREATY , ART . 173 ) 2 . COMPETITION - ADMINISTRATIVE PROCEDURE - PROFESSIONAL SECRECY - MITIGATION - LIMITS - PROTECTION OF BUSINESS SECRETS - WHETHER VALID AS AGAINST A THIRD PARTY WHO HAS MADE A COMPLAINT ( EEC TREATY , ART . 214 ; COUNCIL REGULATION NO 17 , ARTS 19 , 20 ( 2 ) AND 21 ) 3 . COMPETITION - ADMINISTRATIVE PROCEDURE - PROTECTION OF BUSINESS SECRETS - POWERS OF ASSESSMENT OF THE COMMISSION - RIGHTS OF THE UNDERTAKING CONCERNED - RIGHT TO EFFECTIVE JUDICIAL PROTECTION ( EEC TREATY , ARTS 173 AND 185 ; COUNCIL REGULATION NO 17 )