It emerges from the judgment of the Court of Justice of 19 October 2004, in Case C-200/02, Zhu and Chen, that Article 18 of the EC Treaty, relating to the right of every citizen of the Union to move and reside freely within the territory of the Member States, and Directive 90/364, on the right of residence, confer on a young minor who is a national of a Member State, is covered by appropriate sickness insurance and is in the care of a parent who is a third-country national having sufficient resources for that minor not to become a burden on the public finances of the host Member State, a right to reside for an indefinite period in that State. In such circumstances, those same provisions allow a parent who is that minor’s primary carer to reside with the child in the host Member State.