Thank you so much for the question.
The jurisdictional divide does make it complicated when we're issuing temporary boil water advisories, and it may differ from province to province or territory as well.
In Manitoba, we have a public health physician who is on call 24-7 for the entire province, so if a boil water advisory needs to be issued, say, on the weekend, regardless of where it occurs, it would be that individual who issues it. However, come Monday morning, if it's a first nations community, we would need to work with the first nations and Inuit health branch, or whatever it is titled at that time, to ensure that the ongoing work, the official issuance, occurs with them.
Consistent with some of the challenges we've seen with Jordan's principle, it can add complexities when it's a provincial medical officer of health who's done the initial advisory, but it's on a first nations community that is under federal jurisdiction.