This is a way of saying that if you are deemed essential for operations, you get a pass. Thinking of IT resources; database architects, system administrator,
Or NOT.
In which case, I wouldn't want to be the temporary hire on the next day who is unable to boot the company-wide IT system (because - unbeknownst to him - certain essential files have mysteriously been corrupted).
Regards,
DR. Josef Mengele laughter can be heard above ground by his grave.