52As regards the objectives that are capable of justifying national legislation, such as that at issue in the main proceedings, governing the access of public authorities to data retained by providers of electronic communications services and thereby derogating from the principle of confidentiality of electronic communications, it must be borne in mind that the list of objectives set out in the first sentence of Article 15(1) of Directive 2002/58 is exhaustive, as a result of which that access must correspond, genuinely and strictly, to one of those objectives (see, to that effect, Tele2 Sverige and Watson and Others, paragraphs 90 and 115).
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