(1) Proceedings for an offence committed under section 113 outside the United Kingdom are not to be started-
(a) in England and Wales, except by or with the consent of the Attorney General;
(b) in Northern Ireland, except by or with the consent of the Advocate General for Northern Ireland.
(2) Proceedings for an offence committed under section 113 outside the United Kingdom may be taken, and the offence may for incidental purposes be treated as having been committed, in any part of the United Kingdom.
(3) In relation to any time before the coming into force of section 27(1) of the Justice (Northern Ireland) Act 2002, the reference in subsection (1)(b) to the Advocate General for Northern Ireland is to be read as a reference to the Attorney General for Northern Ireland.