In relation to England and Wales, a reference in this Act to imprisonment for a term not exceeding 12 months (including any such reference inserted in any other Act) is to be read, in the case of an offence committed before the commencement of section 154(1) of the Criminal Justice Act 2003 (c. 44) (general limit on magistrates' court’s power to impose imprisonment), as a reference to imprisonment for a term not exceeding six months.