42It follows that, in a situation such as that at issue in the main proceedings, in which the loss of the nationality of a Member State arises by operation of law and entails the loss of citizenship of the Union, the competent national authorities and courts must be in a position to examine, as an ancillary issue, the consequences of the loss of that nationality and, where appropriate, to have the person concerned recover his or her nationality ex tunc in the context of an application by that person for a travel document or any other document showing his or her nationality.
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