One of the grounds for cessation is what is called a change of circumstance. It says that a person's claim can be cessated if the reasons for which the person sought refugee protection have ceased to exist. This can be raised at any point. It can even be raised at the refugee hearing if conditions have changed between the time a claim has been made and the time of the refugee hearing.
You can imagine that a change of circumstance happens halfway around the world. Somebody, like this person from Rwanda I'm describing, is here in Canada and is doing nothing wrong. He is leading a life, working, raising a family, contributing to Canadian society. Halfway around the world, the situation in Rwanda changes. What, then, does this legislation suggest? It indicates that the minister can seek cessation of refugee status because of a change in Rwanda and this person is automatically deportable from Canada. That is automatic, with no appeal to the immigration appeal division.
What this does, of course, is uproot that person's life. It is as if these years they have spent in Canada building a life, contributing to Canadian society, don't matter, don't exist, are erased. That's the significance of this provision.