Regulation 23(1)(a): amended, on 4 April 2016, by section 232 of the Health and Safety at Work Act 2015 (2015 No 70).
Regulation 23(1)(b): amended, on 4 April 2016, by section 232 of the Health and Safety at Work Act 2015 (2015 No 70).
Regulation 23(2)(b): amended, on 4 April 2016, by section 232 of the Health and Safety at Work Act 2015 (2015 No 70).