In order to ensure a clear and efficient relocation procedure, specific rules for benefitting and contributing Member States should be set out. Where responsibility is not determined prior to the relocation, the Member State of relocation should become responsible, except for the cases where the family-related criteria apply. The rules and safeguards relating to transfers set out in this Regulation should also apply, where relevant, to transfers for the purposes of relocation. Such rules should ensure that family unity is preserved and that persons that might pose a threat to internal security are not relocated.