Mandatory but with reasonable exceptions (disabled, young children, etc). That's why special needs schools haven't been able to re-open, even though in theory

Mandatory but with reasonable exceptions (disabled, young children, etc). That's why special needs schools haven't been able to re-open, even though in theory a ten-year old should be trusted to keep on a mask, due to various developmental conditions (e.g. autism, down syndrome, etc) they sometimes cannot. So we should consider edge cases when discussing mask mandates. And I acknowledge that some able-bodied adults will abuse any exception provided, but those exceptions remain important otherwise you're just persecuting a subset of the population who are unable to comply.