31The principle of effective judicial protection, a general principle of EU law which is now enshrined in Article 47 of the Charter of Fundamental Rights of the European Union and which corresponds, in EU law, to Article 6(1) of the ECHR (see judgment of 10 July 2014 in Telefónica and Telefónica de España v Commission, C‑295/12 P, ECR, EU:C:2014:2062, paragraph 57 and the case-law cited), requires that the operative part of a decision adopted by the Commission, finding infringements of the competition rules, must be particularly clear and precise and that the undertakings held liable and penalised must be in a position to understand and to contest that imputation of liability and the imposition of those penalties, as set out in the wording of that operative part.
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