Regulation 20(1): amended, on 4 April 2016, by section 232 of the Health and Safety at Work Act 2015 (2015 No 70).
Regulation 20(2): amended, on 4 April 2016, by section 232 of the Health and Safety at Work Act 2015 (2015 No 70).
Regulation 20(2)(c)(ii): amended, on 1 January 2004, by section 76 of the Chartered Professional Engineers of New Zealand Act 2002 (2002 No 17).