Paragraph 1
Each State Party shall take such measures as may be necessary to establish its jurisdiction over the offences set forth in article 2 when:
(a)
the offence is committed in the territory of that State; or
(b)
the offence is committed on board a vessel flying the flag of that State or an aircraft which is registered under the laws of that State at the time the offence is committed; or
(c)
the offence is committed by a national of that State.