No mask at Checkers. Is Covid not serious then?

Just got back from Metlife Checkers. Time now is 12:28. Inside the shop I wanted to ask a Checkers employee something but noticed the person did not have a mask covering face and nose. It was around the neck. I was offered assistance and rep**** that yes, I would appreciate it once the person had a mask on. He laughed. I then walked away leaving that aspect of my shopping. At the till point I asked where I find the store manager. The cashier pointed me to an office with an open door. The self-same employee was in this office and came towards me when he noticed that he was being discussed. Turns this was the store manager. He claimed that he had a mask to which I responded yes, around your neck. Does the law not stipulate that a mask is to be worn in public spaces at all times? Covering nose and mouth? Definitely not hanging below your chin around your neck.