37Furthermore, it should be borne in mind that, as a justification for derogating from the right of residence of Union citizens or members of their families, the concepts of ‘public policy’ and ‘public security’ must be interpreted strictly, so that their scope cannot be determined unilaterally by the Member States without being subject to control by the EU institutions (see, to this effect, judgments of 4 December 1974, van Duyn, 41/74, EU:C:1974:133, paragraph 18; of 27 October 1977, Bouchereau, 30/77, EU:C:1977:172, paragraph 33; of 29 April 2004, Orfanopoulos and Oliveri, C‑482/01 and C‑493/01, EU:C:2004:262, paragraphs 64 and 65; of 27 April 2006, Commission v Germany, C‑441/02, EU:C:2006:253, paragraph 34; and of 7 June 2007, Commission v Netherlands, C‑50/06, EU:C:2007:325, paragraph 42).
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