(1) A person does not breach a duty to take precautions against a risk of injury to a worker unless—(a) the risk was foreseeable (that is, it is a risk of which the person knew or ought reasonably to have known); and(b) the risk was not insignificant; and(c) in the circumstances, a reasonable person in the position of the person would have taken the precautions.
(2) In deciding whether a reasonable person would have taken precautions against a risk of injury, the court is to consider the following (among other relevant things)—(a) the probability that the injury would occur if care were not taken;(b) the likely seriousness of the injury;(c) the burden of taking precautions to avoid the risk of injury.