52 A telecommunications operator shall offer a calling line identification service for identification of incoming calls prior to answering. It must be possible to prevent displaying the caller’s number on the receiving subscriber’s telephone. A telecommunications operator offering a calling line identification service shall offer subscribers an easy way of barring: 1) identification of his or her subscriber connection; 2) identification of the subscriber connections of incoming calls; 3) reception of calls whose subscriber connection identification is barred, if this is technically possible without undue cost; and 4) identification of the subscriber connection to which incoming calls have been forwarded. The services referred to in paragraphs 1, 2 and 4 of subsection 2 must be free of charge to the subscriber. A telecommunications operator offering a calling line identification service shall offer the user an easy way of barring subscriber connection identification separately for each outgoing call, at no charge. A telecommunications operator shall notify subscribers and users of the services referred to in this section. A telecommunications operator shall ensure that the barring functions referred to in subsections 2 and 4 can be bypassed when disclosing data to emergency services authorities under section 321 or when complying with the right of the police to access information under separate provisions. Information to be saved pursuant to section 157 shall be only disclosed to authorities that by law have a right to them. Ficora may issue technical regulations concerning the bypassing of the barring of subscriber connection identification referred to in subsections 2, 4 and 6. Section 133 Right to monitor accumulation of fees A telecommunications operator in a mobile telephone network shall provide a subscriber and user with a free-of-charge opportunity to monitor the fees resulting from the use of the subscriber connection. Section 134 Bill itemisation and connection-specific itemisation A telecommunications operator shall, without charge or request, provide itemised bills on the use of the subscriber connection. The bill shall without difficulty indicate at least the following billing items: 1) local calls and network charges collected for calls referred to in paragraphs 2–4; 2) long-distance calls; 3) international calls; 4) mobile network calls; 5) subscriber connection basic rates; 6) SMS, picture messages and other messages; 7) data transfer services; 8) services provided at additional charges as referred to in subsection 2. For services at additional charges referred to in subsection 1(8), the telecommunications operator shall indicate in the itemised bill: