Section 28(4A): inserted, on 1 October 2008, by section 9 of the Injury Prevention, Rehabilitation, and Compensation Amendment Act 2008 (2008 No 46).
Section 28(5): amended, on 1 July 2005, by section 11 of the Injury Prevention, Rehabilitation, and Compensation Amendment Act (No 2) 2005 (2005 No 45).