I'll try to answer that. The $517 million is on the contract side, and it's a technical one-time adjustment. It has been approved by the Treasury Board, and it's changing how we collect the revenues that are given to us, the money we are collecting. In effect, it's cost-neutral. There is really no change. It's just the way we did it in prior years, the timing of it, so it's a cost-neutral type of collection.
On May 10th, 2018. See this statement in context.