In order to ensure full respect for the principle of family unity and for the best interests of the child, the existence of a relationship of dependency between an applicant and his or her child, sibling or parent on account of the applicant’s pregnancy or maternity, state of health or old age should be a binding responsibility criterion. When the applicant is an unaccompanied minor, the presence on the territory of another Member State of a family member, sibling or relative who can take care of him or her should also become a binding responsibility criterion. In order to discourage unauthorised movements of unaccompanied minors in the absence of such a family member, sibling or relative, which are not in the best interests of the child, the Member State responsible should be the Member State where the unaccompanied minor’s application for international protection was first registered, if it is in the best interests of the child. Where the unaccompanied minor has applied for international protection in several Member States, and a Member State considers that it is not in the best interests of the child to transfer him or her to the Member State responsible on the basis of an individual assessment, that Member State should become responsible for examining the new application.