224Since the legislation relating to the telecommunications sector defines the legal framework applicable to it and, in so doing, contributes to the determination of the competitive conditions under which an undertaking such as the appellant carries on its business in the relevant markets, it is, as has already been shown in paragraphs 80 to 82 of the present judgment, a relevant factor in the application of Article 82 EC to the conduct of that undertaking, whether for the purposes of defining the relevant markets, assessing the abusive nature of such conduct or setting the amount of the fines.
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