When a department doesn't use all of its appropriation in a year, it actually does revert entirely to the consolidated revenue fund. What happens is that there are mechanisms through the appropriations that allow us to bring in a corresponding amount of money in the following year, or in whatever year they actually need the cash. But there is a conversation with the Department of Finance, because it is a new fiscal charge.
On November 20th, 2014. See this statement in context.