There are only some situations where that would happen. It's where somebody misrepresented in their PR application and then became a citizen. Under the act now, they go back to being a foreign national. Our submission is that they should go to permanent resident status so that they can have an appeal. Those issues could be dealt with at the Immigration Appeal Division. Also, there could be some agency consideration at the stage of citizenship revocation itself.
On April 14th, 2016. See this statement in context.