22As a preliminary point, it must be borne in mind that, although Member States retain the power to organise their social security schemes, they must nonetheless, when exercising that power, observe EU law and, in particular, the provisions of the FEU Treaty on freedom of movement for workers and the right of establishment (see judgments of 1 April 2008, Government of the French Community and Walloon Government, C‑212/06, EU:C:2008:178, paragraph 43, and of 21 January 2016, Commission v Cyprus, C‑515/14, EU:C:2016:30, paragraph 38).
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