In the case of the public administrations the right to the portability of the data is not exigible when the treatment of the particulars is one necessary for the fulfillment of a mission carried out in interest public, for the exercise of public powers conferred on the responsible for the treatment, or when the treatment of the particulars is necessary for the fulfillment of a legal duty. Regarding the informative clauses about the right to the data protection of the documents elaborated by the Town Council, it will be necessary to inform upward to the portability when that is the treatment, besides making for automated means, has the consent of the person concerned as a juridical basis necessary for the execution of a contract in what the person concerned is part, or for the application, at the request of this, of precontractual measures.