53In that regard, it should be recalled, in the first place, that it follows from recital 6 of Directive 2006/123 that barriers to the freedom of establishment may not be removed solely by relying on direct application of Article 49 TFUE, owing, inter alia, to the extreme complexity of addressing barriers to that freedom on a case-by-case basis (see, to that effect, judgment of 16 June 2015, Rina Services and Others, C‑593/13, EU:C:2015:399, paragraph 38), and that, consequently, a directive should be adopted on that subject.
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