Recital 26

The data relating to subscribers processed within electronic communications networks to establish connections and to transmit information contain information on the private life of natural persons and concern the right to respect for their correspondence or concern the legitimate interests of legal persons. Such data may only be stored to the extent that is necessary for the provision of the service for the purpose of billing and for interconnection payments, and for a limited time. Any further processing of such data which the provider of the publicly available electronic communications services may want to perform, for the marketing of electronic communications services or for the provision of value added services, may only be allowed if the subscriber has agreed to this on the basis of accurate and full information given by the provider of the publicly available electronic communications services about the types of further processing it intends to perform and about the subscriber's right not to give or to withdraw his/her consent to such processing. Traffic data used for marketing communications services or for the provision of value added services should also be erased or made anonymous after the provision of the service. Service providers should always keep subscribers informed of the types of data they are processing and the purposes and duration for which this is done.