Earlier quoted context omitted.
Which countries?
It has been illegal to stuff people into room with no natural light in Denmark for at least 40 years. It can just be a skylight if you're in warehouse or factory. I believe that office workers are required to have actual windows and honestly I don't think even the employers think it's right to have windowless offices
There has to be a source of natural daylight and there must be clear windows that you can see through. Of course there are always exceptions, but they are just that.
https://arbejdstilsynet.dk/da/regler/indeklima/belysning-og-...