After section 602 of the Crimes Act 1958 insert —
(1) An amendment of this Act made by section 3, 4, 5 or 6 of the Crimes (Homicide) Act 2005 applies only to offences alleged to have been committed on or after the commencement of that Act.
(2) For the purposes of sub-section (1) if an offence is alleged to have been committed between two dates, one before and one after the commencement of the Crimes (Homicide) Act 2005 , the offence is alleged to have been committed before that commencement.".