(1) Subject to subsections (2) to (4), a person is guilty of an offence if the person -
(a) in or outside the State -
(i) engages in a terrorist activity or a terrorist-linked activity,
(ii) attempts to engage in a terrorist activity or a terrorist-linked activity, other than public provocation to commit a terrorist offence, or
(iii) makes a threat to engage in a terrorist activity,
or
(b) commits outside the State an act that, if committed in the State, would constitute -
(i) an offence under section 21 or 21A of the Act of 1939, or
(ii) an offence under section 6 of the Act of 1998.
(2) Subsection (1) applies to an act committed outside the State if the act -
(a) is committed on board an Irish ship,
(b) is committed on an aircraft registered in the State,
(c) is committed by a person who is a citizen of Ireland or is resident in the State,
(d) is committed for the benefit of a legal person established in the State,
(e) is directed against the State or an Irish citizen, or
(f) is dire
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