There were only some extremely limited exceptions.
The consequential amendments to Canada's Anti-Spam Legislation have reasonably expanded the reasons for which we can refuse to investigate. There are half a dozen exceptions; if you wish, my colleague Regan Morris can clarify this.
If another tribunal was dealing with a similar case, we could refuse to investigate, for instance, when a grievance mechanism would achieve the right outcome. We could then direct our attention to other matters.