The particulars cannot be used for incompatible purposes with those for which they were picked up, without the posterior treatment being considered incompatible for historical purposes, scientific or statistical, as the case is. The consent is not required from the ones affected since the treatment is produced among public administrations. However, the group of research that elaborates l’estudi, as a person in charge of the treatment, will have to return or destroy the data of personal character once the realization of l’estudi concluded.