Maybe as an extension of what my colleague was saying, testing the legality of all of this, I'd be interested to see the background work, because it's noted in the departmental disclosure statement that there is a risk that charging short-term travellers for isolation may not be consistent with the World Health Organization (WHO) International Health Regulations. The argument here being made is that if other countries are doing it, we should be OK too, but there must be a body of material behind that, and I note that without the regulatory impact statement, that's absent. So I'd be interested, maybe in the committee of the whole House, to hear the response to that. How big is the risk of us breaching our WHO regulations?