34In that regard, the Court has already ruled that that prohibition applies in particular to national measures which would require an intermediary provider, such as a hosting service provider, to actively monitor all the data of each of its customers in order to prevent any future infringement of intellectual-property rights. Furthermore, such a general monitoring obligation would be incompatible with Article 3 of Directive 2004/48, which states that the measures referred to by the directive must be fair and proportionate and must not be excessively costly (see Scarlet Extended, paragraph 36).
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