Section 1(2): amended, on 1 April 2005 (effective for 2005–06 tax year and later tax years, except when the context requires otherwise), by section YA 2 of the Income Tax Act 2004 (2004 No 35).
Section 1(3): inserted, on 10 April 1995, by section 2 of the Tax Administration Amendment Act 1995 (1995 No 24).