37In that context, the Court has held that Article 20 TFEU precludes national measures, including decisions refusing a right of residence to the family members of a Union citizen, which have the effect of depriving Union citizens of the genuine enjoyment of the substance of the rights conferred by virtue of their status (judgment of 8 May 2018, K.A. and Others (Family reunification in Belgium), C‑82/16, EU:C:2018:308, paragraph 49 and the case-law cited).
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