Assessed by your regional health authority. A medical health officer working with the contact tracing team will gather further information in most cases before applying this. If people have acquired infection outside the workplace, and its not thought to be transmission in the workplace, this would not necessarily apply. In some cases, if a workplace is deemed critical to some public functions; food processing, which many of your are part of, their are exceptions to this. This is not automatic that the case count will make a workplace close, but it is the direction from the province that the closures will proceed in the absence of those criteria.