50Without necessarily implying an obligation to call for tenders, that obligation of transparency, which applies when the service concession in question may be of interest to an undertaking located in a Member State other than that in which the concession is granted, requires the concession-granting authority to ensure, for the benefit of any potential tenderer, a degree of publicity sufficient to enable the service concession to be opened up to competition and the impartiality of the award procedures to be reviewed (Sporting Exchange, paragraphs 40 and 41 and the case-law cited).
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