18. The principal contractor shall—
(a)ensure that employees and self-employed persons at work on the construction work are able to discuss, and offer advice to him on, matters connected with the project which it can reasonably be foreseen will affect their health or safety; and
(b)ensure that there are arrangements for the co-ordination of the views of employees at work on construction work, or of their representatives, where necessary for reasons of health and safety having regard to the nature of the construction work and the size of the premises where the construction work is carried out.