24. The principal contractor shall—
(a)make and maintain arrangements which will enable him and the workers engaged in the construction work to co-operate effectively in promoting and developing measures to ensure the health, safety and welfare of the workers and in checking the effectiveness of such measures;
(b)consult those workers or their representatives in good time on matters connected with the project which may affect their health, safety or welfare, so far as they or their representatives are not so consulted on those matters by any employer of theirs;
(c)ensure that such workers or their representatives can inspect and take copies of any information which the principal contractor has, or which these Regulations require to be provided to him, which relates to the planning and management of the project, or which otherwise may affect their health, safety or welfare at the site, except any information—
(i)the disclosure of which would be against the interests of national security,
(ii)which he could not disclose without contravening a prohibition imposed by or under an enactment,
(iii)relating specifically to an individual, unless he has consented to its being disclosed,
(iv)the disclosure of which would, for reasons other than its effect on health, safety or welfare at work, cause substantial injury to his undertaking or, where the information was supplied to him by some other person, to the undertaking of that other person, or
(v)obtained by him for the purpose of bringing, prosecuting or defending any legal proceedings.