28It follows that the lack of a contractual link between the two undertakings successively entrusted with managing the surveillance of the buildings in question has no bearing on the question as to whether or not Directive 2001/23 is applicable to a situation such as that at issue in the main proceedings (see, to that effect, judgment of 19 October 2017, Securitas, C‑200/16, EU:C:2017:780, paragraph 24).
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