Duty of principal contractor etc. to limit entry to construction site area where tilt-up work being done

A person who, at a construction site where tilt-up work is being done, is the principal contractor, a person conducting a business or undertaking or a person with management or control of the workplace (a responsible person) must not allow any person to enter or remain in an area of the site where tilt-up work is being done except —
(a) a person doing the work; or
(b) a person who has the written authority of a responsible person to enter the area for a purpose connected with the work; or
(c) a person authorised under a written law to enter the area.