The legitimacy and the proportionality of the recording of the outgoing calls made from the prefecture of the Local Police of the Town Council will depend on the purpose that is pursued, the conditions in which it is carried out and the existence of less intrusives alternatives that allow to attain the same purpose. It will require, in the cases in which it is admissible, to inform the workers of the Town Council as well as the persons that they are put with in touch telephonically of it previously, unless it affects the public safety or the persecution of penal offenses (article 24.1 LOPD).