Data relating to persons who have disappeared or to persons who, in the interests of their own protection or in order to prevent threats, need to be placed provisionally in a place of safety at the request of the competent authority or the competent judicial authority of the reporting Party, shall be included in order that the police authorities can communicate their whereabouts to the reporting Party or can remove the person to a place of safety for the purposes of preventing him from continuing his journey, if so authorized by national legislation.