77Accordingly, the application of such national legislation on the burden of proof does not relieve the authorities of the Member State concerned of the obligation to undertake, on the basis of the evidence provided by the third-country national, the necessary inquiries to determine where the parent who is a national of that Member State resides and to examine, first, whether that parent is, or is not, actually able and willing to assume sole responsibility for the primary day-to-day care of the child, and, second, whether there is, or is not, such a relationship of dependency between the child and the third-country national parent that a decision to refuse the right of residence to the latter would deprive the child of the genuine enjoyment of the substance of the rights attached to his or her status as a Union citizen by obliging the child to leave the territory of the European Union, as a whole.
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