The policy hasn't actually changed at all. Right now, if you have a $2 billion reserve, that would ultimately mean a $2 billion deficit if it's backstopped by the consolidated revenue fund. So at some point, the Minister of Finance would determine how that deficit would be paid back, and that would be up to him, in this case, to make that judgment.
The way it would occur today--without the reserve--is there'd be a $4 billion deficit in the consolidated revenue fund and again it would be up to the Minister of Finance to determine how that deficit would be paid back.