30National legislation which places certain of the nationals of a Member State at a disadvantage simply because they have exercised their freedom to move and to reside in another Member State is a restriction on the freedoms conferred by Article 21(1) TFEU on every citizen of the Union (see, to that effect, judgments of 14 October 2008, Grunkin and Paul, C‑353/06, EU:C:2008:559, paragraph 21; of 26 February 2015, Martens, C‑359/13, EU:C:2015:118, paragraph 25 and the case-law cited; and of 8 June 2017, Freitag, C‑541/15, EU:C:2017:432, paragraph 35).
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