51In the second place, according to settled case-law, a restriction on freedom of establishment may be justified, if applied without discrimination on grounds of nationality, by overriding reasons in the public interest, provided that it is appropriate for securing the attainment of the objective which it pursues and does not go beyond what is necessary in order to attain it (see, to that effect, inter alia, judgment of 9 March 2017, Piringer, C‑342/15, EU:C:2017:196, paragraph 53 and the case-law cited).
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