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3. Paragraphs 1 and 2 of this Article shall not prevent the detention, trial, or punishment of an extradited person, or the extradition of that person to a third State, if:
| (a) | that person leaves the territory of the Requesting State after extradition and voluntarily returns to it; or |
| (b) | that person does not leave the territory of the Requesting State within 15 days of the day on which that person is free to leave. |
Article 18
Waiver of Extradition
If the person sought consents to surrender to the Requesting State, the Requested State may, subject to its laws, surrender the person as expeditiously as possible without further proceedings.
Article 19
Transit
1. Either Contracting State may authorize transportation through its territory of a person surrendered to the other State by a third State. A request for transit shall be made through the diplomatic channel. The facilities of Interpol may be used to transmit such a request. It shall contain a description of the person being transported and a brief statement of the facts of the case. A person in transit may be detained in custody during the period of transit.
2. No authorization is required where air transportation is used and no landing is scheduled on the territory of the Contracting State. If an unscheduled landing occurs on the territory of the other Contracting State, the other Contracting State may require the request for transit as provided in paragraph 1. That Contracting State shall detain the person to be
