"If the applicant had been injured while playing a game of cards in her motel room, she would be entitled to compensation even though it could not be said that her employer induced her to engage in such activity," Nicholas wrote then.
Comcare lost its appeal to the Full Bench last December, with the judges finding that the government's views on the woman having sex were irrelevant. "No approval, express or implied, of the respondent's conduct was required," they said.
But the High Court ruled that Comcare was not liable to pay compensation. It's not clear how much compensation for the woman's physical and psychological injuries was in question.
"The relevant question is: did the employer induce or encourage the employee to engage in that activity?" a summary of the court ruling said. A majority of judges Justices Kenneth Hayne, Susan Crennan, Susan Kiefel and Virginia Bell answered: "No."
Justice Stephen Gageler dissented.
The crucial facts were that the overnight stay was within the two-day period of the work trip and her employer had encouraged the woman to stay in the motel in Nowra, 160 kilometers (100 miles) south of her hometown of Sydney.
"In the absence of any suggestion that she was engaged at the time of injury in misconduct, those facts were sufficient to conclude that the injury the respondent sustained during that interval, and when at that place, was sustained in the course of her employment," Gageler said.
"The particular activity in which the respondent was engaged at the time she was injured does not enter into the analysis," he added.