12.- (3) An act which—
(a) is done outside the State on board an Irish ship or Irish controlled aircraft, and
(b) if done within it, would constitute an ICC offence, is deemed for the purposes of this Act to have been done within the State.
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;