There was an interesting discussion by Edelman and Steward JJ from paragraph 50ff regarding three types of “vicarious liability”, of which only the second is true vicarious liability:
Agency, involving attributed acts, which is actually primary (not vicarious) liability, as the acts are authorised and/or part of a joint enterprise (par 50, with further detail at 55-58).
Vicarious liability in the true sense, involving attributed liability (not acts). The acts may not have been authorised but were “sufficiently or closely connected to the employee's duties or powers of employment so that they could be said to have been performed in the ‘course of their employment’. This Court has not extended vicarious liability in this sense beyond employees” (paragraph 51, with further detail at 59-69 including an interesting historical perspective of how the law moves to accommodate commerce becoming more remote).
Non-delegable duty, where someone delegates authority but “could not ‘cast off this duty by handing over the performance of it’ to another” and this area is ‘not confined to employers’ (paragraph 53, with further detail at 70-81).
In the present case, the question was whether the other employee’s (Hewett’s) “act of negligent urination was so closely connected with Mr Hewett's employment duties that the act could be said to have occurred in the course of Mr Hewett's employment”, which was answered in the negative. Paragraph 87-88 assesses the facts as follows:
“Mr Hewett did not perform the negligent act of urination during his hours of work. He did so around 3.30 am after he had been drinking at the staff bar on his leisure time. Mr Hewett did not perform the negligent act at the place at which he was employed to perform work, as a team leader at the ‘Mermaids’ restaurant. He did not perform the negligent act at a time and place where his employer was permitted to be present or to monitor him. His employer's power, set out in the Letter of Appointment provided to employees, to ‘monitor its offices and employees’ did not extend to surveillance of Mr Hewett on his leisure time or in his personal accommodation. Mr Hewett's employment duties to take reasonable care that his ‘acts or omissions do not adversely affect the health and safety of other persons’ and not to ‘attend work having consumed alcohol or drugs’ were concerned only with his duties while working for his employer as a restaurant team leader, not with his conduct during his leisure time. Mr Hewett's negligent actions were not closely connected with any of his duties or powers of employment. The actions were not in Mr Hewett's course of employment. The appellant, as his employer, cannot be attributed with Mr Hewett's liability for negligence.”