Years ago, had a job at a public establishment. Building gets evacuated due to suspected gas leak. Four fire trucks in front of the entrance with lights flashing and an army of firemen inside, trying to find the source of the leak. In the midst of all of this, a customer walks between two of the trucks and tries to enter the building.
It was fun watching the fire fighters scold him like a toddler
That's fine for doors that unlock when you push the bumper-style handle from the inside. Some older doors without this must be unlocked to open from inside.
In some places it may be that having at least one nearby exit unlocked to people inside is sufficient so a place with a deadbolt locked front door and a nearby push to open style backdoor could still be compliant.
If they are older doors that cant be pushed open (riotbars and or firerelease style locks) then this is the law at least in most of the US. New commercial properties MUST have these style doors, but old ones can be grandfathered in with that clause.
I once overheard two ladies in a restaurant, on Easter, arguing about whether or not there are people who work on holidays. One was convinced that literally everyone gets a day off then, and the other one claimed otherwise but failed to come up with examples. I mean, it is one thing to forget that firefighters, nurses etc. exist, but it is a whole other level of stupidity to sit in an effing restaurant, having waiters run around your field of vision constantly, getting served freshly cooked food, on a holiday, and still failing to come up with a single example of people working on holidays.