250In order to determine whether the Commission was obliged to give the applicants the benefit of the attenuating circumstance of the existence of reasonable doubt, and even, as appropriate, not to impose a fine — as requested by the applicants in this plea in law — it must be ascertained whether the applicants should reasonably have been aware that they were infringing Article 81 EC (see, to that effect, Joined Cases T-259/02 to T-264/02 and T-271/02 Raiffeisen Zentralbank Österreich and Others v Commission [2006] ECR II-5169, paragraph 503).
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