Artikel 13

1. Any Contracting State shall take delivery of any person whom the aircraft commander delivers pursuant to Article 9, paragraph 1.
2. Upon being satisfied that the circumstances so warrant, any Contracting State shall take custody or other measures to ensure the presence of any person suspected of an act contemplated in Article 11, paragraph 1 and of any person of whom it has taken delivery. The custody and other measures shall be as provided in the law of that State but may only be continued for such time as is reasonably necessary to enable any criminal or extradition proceedings to be instituted.
3. Any person in custody pursuant to the previous paragraph shall be assisted in communicating immediately with the nearest appropriate representative of the State of which he is a national.
4. Any Contracting State, to which a person is delivered pursuant to Article 9, paragraph 1, or in whose territory an aircraft lands following the commission of an act contemplated in Article 11, paragraph 1, shall immediately make a preliminary enquiry into the facts.
5. When a State, pursuant to this Article, has taken a person into custody, it shall immediately notify the State of registration of the aircraft and the State of nationality of the detained person and, if it considers it advisable, any other interested State of the fact that such person is in custody and of the circumstances which warrant his detention. The State which makes the preliminary enquiry contemplated in paragraph 4 of this Article shall promptly report its findings to the said States and shall indicate whether it intends to exercise jurisdiction.