I'd have to think about that a little more closely, but I think that would be very easy to come up with. When there is x burden of COVID in a particular community, it could be recommended to wear a mask at a certain point. Of course, mask-wearing would be voluntary at any point, but that's something that certainly could be modelled and discussed with an interdisciplinary team.
On March 30th, 2022. See this statement in context.