(1)It is an offence against the law of Northern Ireland for a person to engage in conduct ancillary to an act to which this section applies.
(2)This section applies to an act that if committed in Northern Ireland would constitute—
(a)an offence under section 58 (genocide, crime against humanity or war crime), or
(b)an offence under this section,
but which, being committed (or intended to be committed) outside Northern Ireland, does not constitute such an offence.
(3)The reference in subsection (1) to conduct ancillary to such an act is to conduct that would constitute an ancillary offence in relation to that act if the act were committed in Northern Ireland.
(4)This section applies where the conduct in question consists of or includes an act committed—
(a)in Northern Ireland, or
(b)outside the United Kingdom by a United Kingdom national or a United Kingdom resident.