Section 22 heading: amended, on 1 October 2008, by section 7(1) of the Injury Prevention, Rehabilitation, and Compensation Amendment Act 2008 (2008 No 46).
Section 22(3): substituted, on 1 July 2005, by section 9(1) of the Injury Prevention, Rehabilitation, and Compensation Amendment Act (No 2) 2005 (2005 No 45).
Section 22(4)(b): amended, on 1 July 2005, by section 9(2) of the Injury Prevention, Rehabilitation, and Compensation Amendment Act (No 2) 2005 (2005 No 45).
Section 22(5): substituted, on 1 July 2005, by section 9(3) of the Injury Prevention, Rehabilitation, and Compensation Amendment Act (No 2) 2005 (2005 No 45).
Section 22(7): added, on 1 October 2008, by section 7(2) of the Injury Prevention, Rehabilitation, and Compensation Amendment Act 2008 (2008 No 46).