In some locations the masks are required for hygiene reasons, such as restaurants. The owner of the restaurant might insist that the kitchen staff would wear mask at all times whiles being in the kitchen.
Some locations, such as hospitals or special labs, also require visitors to wear masks.
During the pandemic, the mask requirements may extend to various locations, including schools, airports, governmental and commercial buildings, retail stores and more.
There may also be the opposite situations where wearing a mask should gain the attention of the security team, such as entering the bank wearing the mask, which makes the indentification of the person difficult.