Persons upon whom duties are imposed by these Regulations
4.—(1) Subject to paragraph (5), it shall be the duty of every employer whose employees are carrying out construction work and every self-employed person carrying out construction work to comply with the provisions of these Regulations insofar as they affect him or any person at work under his control or relate to matters which are within his control.
(2) It shall be the duty of every person (other than a person having a duty under paragraph (1) or (3)) who controls the way in which any construction work is carried out by a person at work to comply with the provisions of these Regulations insofar as they relate to matters which are within his control.
(3) Subject to paragraph (5), it shall be the duty of every employee carrying out construction work to comply with the requirements of these Regulations insofar as they relate to the performance of or the refraining from an act by him.
(4) It shall be the duty of every person at work—
(a)as regards any duty or requirement imposed on any other person under these Regulations, to co-operate with that person so far as is necessary to enable that duty or requirement to be performed or complied with; and
(b)where working under the control of another person, to report to that person any defect which he is aware may endanger the health or safety of himself or another person.
(5) This regulation shall not apply to regulations 22 and 29(2), which expressly say on whom the duties are imposed.