68The requirement in Article 4(2) of Directive 2000/78 must comply with the principle of proportionality. While that provision, unlike Article 4(1) of the directive, does not expressly provide that the requirement must be ‘proportionate’, it nonetheless provides that any difference of treatment must take account of the ‘general principles of Community law’. As the principle of proportionality is one of the general principles of EU law (see, to that effect, judgments of 6 March 2014, Siragusa, C‑206/13, EU:C:2014:126, paragraph 34 and the case-law cited, and of 9 July 2015, K and A, C‑153/14, EU:C:2015:453, paragraph 51), the national courts must ascertain whether the requirement in question is appropriate and does not go beyond what is necessary for attaining the objective pursued.
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