Section 4(1A): inserted, on 1 December 2004, by section 5(1) of the Employment Relations Amendment Act (No 2) 2004 (2004 No 86).
Section 4(1B): replaced, on 6 March 2015, by section 4 of the Employment Relations Amendment Act 2014 (2014 No 61).
Section 4(1C): replaced, on 6 March 2015, by section 4 of the Employment Relations Amendment Act 2014 (2014 No 61).
Section 4(1C)(a)(ii): replaced, on 1 December 2020, by section 217 of the Privacy Act 2020 (2020 No 31).
Section 4(1D): inserted, on 6 March 2015, by section 4 of the Employment Relations Amendment Act 2014 (2014 No 61).
Section 4(4)(ba): inserted, on 1 December 2004, by section 5(2) of the Employment Relations Amendment Act (No 2) 2004 (2004 No 86).
Section 4(4)(bb): inserted, on 1 December 2004, by section 5(2) of the Employment Relations Amendment Act (No 2) 2004 (2004 No 86).
Section 4(4)(ea): inserted, on 6 November 2020, by section 33 of the Equal Pay Amendment Act 2020 (2020 No 45).
Section 4(6): added, on 1 December 2004, by section 5(3) of the Employment Relations Amendment Act (No 2) 2004 (2004 No 86).