34It follows, in particular, from Article 76(4) of Regulation No 883/2004 that, while the authorities are required to respond to all queries within a reasonable period of time and to provide the persons concerned with any information required for exercising the rights conferred on them by that regulation, those persons are, for their part, required to inform the institutions of the competent Member State and of the Member State of residence as soon as possible of any change in their personal or family circumstances which affects their right to benefits under that regulation.
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