Section 138(1)(b): substituted, on 5 May 2003, by section 33(5) of the Health and Safety in Employment Amendment Act 2002 (2002 No 86).
Section 138(1)(b)(ii): repealed, on 4 April 2016, by section 11 of the Employment Relations Amendment Act 2015 (2015 No 73).
Section 138(1)(b)(iii): added, on 1 April 2011, by section 20 of the Employment Relations Amendment Act 2010 (2010 No 125).
Section 138(4A): inserted, on 1 December 2004, by section 46 of the Employment Relations Amendment Act (No 2) 2004 (2004 No 86).