52However, although in preliminary ruling proceedings it is for the national court to establish whether such objective reasons exist in the particular case before it, the Court of Justice, which is called on to provide answers of use to the national court, may provide guidance based on the documents in the file and on the written and oral observations which have been submitted to it, in order to enable the national court to give judgment (see Hill and Stapleton, cited above, paragraph 36, and Seymour-Smith and Perez, cited above, paragraph 68).
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