I When Employees refuse to work until their demands are met, or an agreement is created.
II For the whole group of employees to get what they want by refusing to work.
III When the owners or management do not allow the employees to work.
IV To stop the workers from doing something unsafe, violent, or socially unacceptable.
V Because both companies belong to the federal government, and are needed for Canada's growth.
VI Because Pension cuts were happening to new employees
VII Because Vacation time was being taken away from employees