22 2. The request for preventive detention shall include the content specified in paragraph 1 of Article 7 of this Treaty, a declaration attesting to the existence of the documents indicated in paragraph 2 of that article and a declaration indicating that the formal request for the person’s extradition shall be sent promptly. 3. The requested Contracting Party shall move quickly to inform the requesting Contracting Party of the outcome of its request. 4. Preventive detention shall be terminated if the competent authority in the requested Contracting Party has not received a formal request for extradition within the sixty days following the date on which the person being sought was taken into custody. This time period may be extended by another thirty days when the requesting Contracting Party gives justifiable reasons. 5. Pursuant to paragraph 4 of this article, termination of preventive detention shall not affect the extradition of the person being sought if the requested Contracting Party subsequently receives the formal request for extradition. Article 10 Decision on the extradition request 1. The requested Contracting Party shall process the extradition request in accordance with the procedures established in its domestic laws and shall promptly inform the requesting Contracting Party of its decision. 2. If the extradition request is denied either in whole or in part, the requested Contracting Party shall advise the requesting Contracting Party of the reasons for its refusal to grant full extradition. Article 11 Surrender of the person whose extradition was requested 1. If the requested Contracting Party grants extradition, the Contracting Parties shall agree on the time and place for the surrender of the person sought and other relevant matters related to execution of the extradition. In the meantime, the requested Contracting Party shall inform the requesting Contracting Party of the amount of time that the person to be extradited was held in custody prior to being surrendered. 2. If the requesting Contracting Party does not take custody of the extradited person within the fifteen days following the date agreed for execution of the extradition, the requested Contracting Party shall immediately release said person and may deny any further extradition request from the requesting Contracting Party seeking the same person for the same crime, with the proviso stipulated in paragraph 3 of this article. 3. If, owing to unforeseen circumstances, the requested Contracting Party fails to surrender the person in its custody or the requesting Contracting Party fails to take custody of said person within the agreed upon period, the other Party shall be informed as soon as possible. The Contracting Parties may reach another agreement on the particulars of the surrender, and the provisions of paragraph 2 of this article shall be applied. .