Mr. Simard, you said that some people had had to resign. From my knowledge of human resources, that is called constructive dismissal. When an employee's working conditions are changed, is the employee not protected by the collective agreement? If employees who work days are told that, starting next week, they will be working nights, does the collective agreement protect them? This is what is called a constructive dismissal. The employee is being dismissed.
On October 7th, 2016. See this statement in context.