"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."
"Every client shall ensure, so far as is reasonably practicable, that the construction phase of any project does not start unless a health and safety plan complying with regulation 15(4) has been prepared in respect of that project."