COOK ISLANDS - CRIMES ACT 1969
PART I - JURISDICTION
5. Persons not to be tried in respect of things done outside the Cook Islands - Subject to the provisions of section 6 of this Act, no act done or omitted outside the Cook Islands is an offence, unless it is an offence by virtue of any provision of this Act or of any other enactment.
2. In the case of article 13, paragraph (a) or (c), the Court may exercise its jurisdiction if one or more of the following States are Parties to this Statute or have accepted the jurisdiction of the Court in accordance with paragraph 3:
(a) The State on the territory of which the conduct in question occurred or, if the crime was committed on board a vessel or aircraft, the State of registration of that vessel or aircraft;