29The applicant concludes from all the above that, in the present case, the Commission did not reach the standards of proof required pursuant to, inter alia, the Cartonboard judgment The Commission failed to show that the applicant ‘knew or should have known’ within the meaning of that case-law (see recital 320 and foonote 231 of the contested decision, referring to Case T-295/94Buchmann v Commission [1998] ECR II-813, paragraph 121; Cases T-310/94Gruber + Weber v Commission [1998] ECR II-1043, paragraph 140; and T-9/99HFB and Others v Commission [2002] ECR II-1487, paragraph 231).