29It is clear from the Court’s settled case-law that it is for the party or the authority alleging an infringement of the competition rules to prove it and that it is for the undertaking or association of undertakings raising a defence against a finding of an infringement of those rules to demonstrate that the conditions for applying the rule on which such defence is based are satisfied, so that the authority will then have to resort to other evidence (see, to that effect, Aalborg Portland and Others v Commission, paragraph 78).
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