Section 89A: inserted, on 1 October 1996, by section 11 of the Tax Administration Amendment Act (No 2) 1996 (1996 No 56).
Section 89A(3): inserted, on 20 May 1999 (applying on and after 20 May 1999), by section 73(1) of the Taxation (Accrual Rules and Other Remedial Matters) Act 1999 (1999 No 59).
Section 89A(3): 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).