des libertés fondamentales.” / "Ik verklaar Belgisch staatsburger te willen worden en de Grondwet, de wetten van het Belgische volk en het Verdrag tot bescherming van de rechten van de mens en de fundamentele vrijheden te zullen naleven.") Other requirements A birth certificate is almost always required, except in a few limited scenarios where it would be impossible to obtain one. The birth certificate must be legalised in the country of origin (unless there is an international treaty in place), and a sworn translation into one of the national languages must be appended (unless the document is already in one of these languages). Depending on the selected route, the person may be required to satisfy a language requirement and/or prove other types of social/economic integration. For a recovery declaration, the person does not need to satisfy any language or integration requirements. Most declarations require payment of a fee of €150. However, for a recovery declaration, there is no fee (i.e. the procedure is free). Some municipalities levy additional taxes/fees, such as a €50 fee in Brussels. Procedure Nationality declarations must be submitted at the registrar in the person's municipality in Belgium. The registrar is only responsible for collating the required documents and is not responsible for approving the declaration. The declaration file is then transferred to the King's Prosecutor (also known as the Crown Prosecutor) (Procureur du Roi / Procureur des Konings) for review, which lasts up to four months. The prosecutor will check that the person satisfies the criteria, as well as whether there are any serious negative facts (faits personnels graves / gewichtige feiten eigen) that would preclude the person from being accorded Belgian nationality (such as a criminal record or terrorist links). If the prosecutor issues a positive decision or does not issue a decision within the allocated time period of four months, the person becomes a Belgian citizen. The municipal registrar draws up a corresponding act (acte de nationalité belge / akte van Belgische nationaliteit) and updates the person's record in the National Register. The person concerned is then invited to apply for a Belgian citizens' identity card. The names of new citizens are periodically published in the Belgian official journal (Moniteur belge / Belgisch Staatsblad). If the prosecutor issues a negative decision, the person concerned is notified and given the opportunity to appeal the decision through the courts. Dual citizenship Following legal changes that took