(1) Every employer shall, for the purpose of promoting and developing measures to ensure the safety, health and welfare at work of his or her employees and ascertaining the effectiveness of those measures -

(a) consult his or her employees for the purpose of making and maintaining arrangements which will enable the employer and his or her employees to co-operate effectively for those purposes,

(b) in accordance with the arrangements referred to in paragraph (a), consult with his or her employees, their safety representatives or both, as appropriate, in advance and in good time regarding -

(i) any measure proposed to be taken in the place of work which may substantially affect the safety, health and welfare of those employees, including measures to be taken under the relevant statutory provisions,

(ii) the designation of employees under section 11,

(iii) activities arising from or related to the protection from and the prevention of risks to safety, health and welfare at work,

(iv) the hazard identification and the risk assessment to be carried out under section 19,