64In that regard, the Court has consistently held that the principle of freedom of movement for workers must be given a broad interpretation (see, to that effect, Antonissen, cited above, paragraph 11, and Case C-344/95 Commission v Belgium [1997] ECR I-1035, paragraph 14), whereas derogations from that principle must be interpreted strictly (see, to that effect, Case 41/74 Van Duyn [1974] ECR 1337, paragraph 18; Case 67/74 Bonsignore [1975] ECR 297, paragraph 6; Kempf, cited above, paragraph 13; and Case C-357/98 Yiadom [2000] ECR I-9265, paragraph 24).
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