b. The investigation or prosecution shall be conducted on the basis of the charge or charges made by the requesting State against the suspect, in accordance with the provisions and procedures of the law of the prosecuting State. Article 15 The submission by the requesting State of a request for prosecution in accordance with paragraph (a) of the preceding Article shall entail the suspension of the measures taken by it to pursue, investigate and prosecute the suspect whose prosecution is being requested, with the exception of those required for the purposes of the judicial cooperation and assistance, or the judicial delegation, sought by the State requested to conduct the prosecution. Article 16 a. The measures taken in either the requesting State or that in which the prosecution takes place shall be subject to the law of the State in which they are taken and they shall have the force accorded to them by that law. b. The requesting State may try or retry a person whose prosecution it has requested only if the requested State declines to prosecute him. c. The State requested to take proceedings shall in all cases undertake to notify the requesting State of what action it has taken with regard to the request and of the outcome of the investigation or prosecution. Article 17 The State requested to take proceedings may take all the measures and steps established by its law with respect to the accused both before the request to take proceedings reaches it and subsequently. Article 18 The transfer of competence for prosecution shall not prejudice the rights of the victim of the offence, who reserves the right to approach the courts of the requesting State or the prosecuting State with a view to claiming his civil-law rights as a result of the offence. Section IV Seizure of assets and proceeds derived from the offence Article 19 a. If it is decided to extradite the requested person, any Contracting State shall undertake to seize and hand over to the requesting State the property used and proceeds derived from or relating to the terrorist offence, whether in the possession of the person whose extradition is sought or that of a third party.