25Such integration, which is a precondition of the acquisition of the right of permanent residence laid down in Article 16(1) of Directive 2004/38 is based not only on territorial and temporal factors but also on qualitative elements, relating to the level of integration in the host Member State (see Case C-325/09 Dias [2011] ECR I-6387, paragraph 64), to such an extent that the undermining of the link of integration between the person concerned and the host Member State justifies the loss of the right of permanent residence even outside the circumstances mentioned in Article 16(4) of Directive 2004/38 (see, to that effect, Dias, paragraphs 59, 63 and 65).
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