18.—(1) Each part of a construction site must, so far as is reasonably practicable, be kept in good order and those parts in which construction work is being carried out must be kept in a reasonable state of cleanliness.
(2) Where necessary in the interests of health and safety, a construction site must, so far as is reasonably practicable, and in accordance with the level of risk posed, comply with either or both of the following—
(a)have its perimeter identified by suitable signs and be arranged so that its extent is readily identifiable; or
(b)be fenced off.
(3) No timber or other material with projecting nails (or similar sharp object) must—
(a)be used in any construction work; or
(b)be allowed to remain in any place,
if the nails (or similar sharp object) may be a source of danger to any person.