II. Investigations: Contracting States shall undertake to promote cooperation among themselves and to provide assistance with respect to measures for the investigation and arrest of fugitives suspected or convicted of terrorist offences in accordance with the laws and regulations of each State. III. Exchange of expertise: 1. Contracting States shall cooperate in the conduct and exchange of research studies for the suppression of terrorist offences and shall exchange expertise in the counterterrorism field. 2. Contracting States shall cooperate, within the limits of their resources, in providing all possible technical assistance for the formulation of programmes or the holding of joint training courses or training courses intended for one State or for a group of Contracting States, as required for the benefit of those working in counterterrorism with the aim of developing their scientific and practical abilities and enhancing their performance. Chapter II The Judicial Field Section I Extradition of Offenders Article 5 Contracting States shall undertake to extradite those indicted for or convicted of terrorist offences whose extradition is requested by any of these States in accordance with the rules and conditions stipulated in this Convention. Article 6 Extradition shall not be permissible in any of the following circumstances: a. If the offence for which extradition is requested is regarded under the laws in force in the requested State as an offence of a political nature; b. If the offence for which extradition is requested relates solely to a dereliction of military duties; c. If the offence for which extradition is requested was committed in the territory of the requested Contracting State, except where the offence has harmed the interests of the requesting State and its laws provide for the prosecution and punishment for such offences and where the requested State has not initiated any investigation or prosecution; d. If a final judgement having the force of res judicata has been rendered in respect of the offence in the requested Contracting State or in a third Contracting State; e. If, on delivery of the request for extradition, proceedings have been terminated or punishment has, under the law of the requesting State, lapsed because of the passage of time; f. If the offence was committed outside the territory of the requesting State by a person who is not a national of that State and the law of the