I will try to explain the procedure as best I can.
First of all, section 87.4 is constructed so there's an obligation on the part not only of the union and the employer but also of the employees to ensure that during any strike or lockout anything required to be done to ensure the safety and health of the public is continued. So the construction of section 87.4 is such that there is an opportunity for the employer and the union to negotiate. If they reach an agreement, then under subsection 87.4(3), they can file that agreement with the board, and then it becomes an order of the board.
If they fail to reach an agreement, then pursuant to section 87.4, any time prior to 15 days after a notice of dispute, either party can come to the board. Once they do that, the board will inquire into the matter and will make a decision as to what is required to ensure the safety and health of the public. The parties are not permitted to engage in a legal strike or lockout until the board issues its decision.
When the legislation was very new and people were not very familiar with it, there was another provision there—subsection 87.4(5)—which allowed the Minister of Labour to refer the issue to the board. When the provision was new, the parties would of course sometimes arrive at a notice of dispute and not have fulfilled the requirements of the initial parts of section 87.4. Once the Minister of Labour refers it to the board, the same thing is true: the parties do not have the legal right to strike or lock out until the board issues the decision.
That's basically how it's supposed to work.