A perpetrator,who enables the authorities to arrest other perpetrators of the crime, before or after commencement of investigations, may be exempted from such punishments. Article 15 Without prejudice to the rights of bona fide third parties, impounded objects, property, weapons, and instruments, which are obtained, used or were intended to be used in any of the crimes to which the present Law applies, shall be confiscated. Article 16 The criminal case with respect to the crimes to which the provisions of the present Law apply, and the sentences passed thereon shall not abate. Article 17 In conducting an investigation and opening a criminal case with respect to terrorist crimes, the Public Prosecutor shall not be bound by the procedural requirements of the Code of Criminal Procedures. Article 18 Notwithstanding the provisions of the Code of Criminal Procedures, orders for precautionary detention issued by the Public Prosecutor after interrogating a suspect with respect to crimes to which the provisions of the present Law apply, shall normally expire at the end of fifteen days, and may be extended by similar periods, where this would be in the interests of the investigation, provided that such extensions shall not exceed six months in total. Further extensions shall be by order from a competent court. Article 19 The Public Prosecutor or whichever public attorney is appointed as his deputy, may order interception of communications, the confiscation of parcels and telegrams and the recording of all events taking place in public and private places, whenever such order is useful for the purpose of establishing the truth with respect to the crimes to which the provisions of the present Law apply.[ In all cases, the confiscation, interception or recording ordershall be reasoned and applied for a period of not more than ninety days, and shall not be extended except by order from the competent court. Article 20 The Public Prosecutor, or whichever public attorney is appointed as his deputy, may order the review or collection of any data or information relating to accounts, deposits, trusts, safe deposit boxes, or any other transaction with banks or other financial institutions, if such order is necessary to establish the truth with respect to the crimes to which the provisions of the present Law apply.