Section 9(ab): inserted, on 15 March 2008, by section 7 of the Building Amendment Act 2008 (2008 No 4).
Section 9(ac): inserted, on 13 March 2012, by section 8 of the Building Amendment Act 2012 (2012 No 23).
Section 9(b): amended, on 4 April 2016, by section 232 of the Health and Safety at Work Act 2015 (2015 No 70).
Section 9(g): replaced, on 4 April 2016, by section 232 of the Health and Safety at Work Act 2015 (2015 No 70).
Section 9(h): replaced, on 4 April 2016, by section 232 of the Health and Safety at Work Act 2015 (2015 No 70).