The Extradition (Taking of Hostages) Order 1997

Article 5

1.  Each State Party shall take such measures as may be necessary to establish its jurisdiction over any of the offences set forth in article 1 which are committed:

(a) in its territory or on board a ship or aircraft registered in that State;

(b) by any of its nationals or, if that State considers it appropriate, by those stateless persons who have their habitual residence in its territory;

(c) in order to compel that State to do or abstain from doing any act; or

(d) with respect to a hostage who is a national of that State, if that State considers it appropriate.

2.  Each State Party shall likewise take such measures as may be necessary to establish its jurisdiction over the offences set forth in Article 1 in cases where the alleged offender is present in its territory and it does not extradite him to any of the States mentioned in paragraph 1 of this article.

3.  This Convention does not exclude any criminal jurisdiction exercised in accordance with internal law.