21.—Where employers share a place of work, they shall—

(a) in relation to safety, health and welfare at work, co-operate in complying with and implementing the relevant statutory provisions,

(b) taking into account the nature of the work carried on at the place of work concerned—

(i) co-ordinate their actions in matters relating to the protection from and prevention of risks to safety, health and welfare at work, and

(ii) inform each other and their respective employees and safety representatives (if any) of any risks to their safety, health and welfare arising from the work activity, including by the exchange of safety statements or relevant extracts therefrom relating to hazards and risks to employees.