38Furthermore, as the Advocate General observed in point 33 of his Opinion, that limitation respects the essential contents of the principle of non-discrimination. That limitation does not call into question the principle as such, as it concerns only the question, limited in scope, of restrictions on performing pilot duties in order to ensure the safety of aviation (see, by analogy, judgment of 29 April 2015, Léger, C‑528/13, EU:C:2015:288, paragraph 54).
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