44As regards the posting of workers who are third-country nationals by a service provider established in a Member State of the European Union, the Court has already held that national provisions which make the provision of services within national territory by an undertaking established in another Member State subject to the issue of an administrative authorisation constitute a restriction on the freedom to provide services within the meaning of Article 56 TFEU (judgment of 11 September 2014, Essent Energie Productie, C‑91/13, EU:C:2014:2206, paragraph 45).
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