69It thus noted, in paragraphs 135 and 137 of the judgment under appeal, that it followed from the case-law of the Court of Justice that the principle of legal certainty required, particularly, that rules of law be clear, precise and foreseeable in their effects, in particular where they may have adverse effects on individuals and undertakings and that, as regards the principle of the protection of legitimate expectations, the Court of Justice held that a person may not plead a breach of that principle unless the administration has given him precise assurances (see, to that effect, judgment of 20 December 2017, Global Starnet, C‑322/16, EU:C:2017:985, paragraph 46 and the case-law cited).
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