If I could add to this, as we just talked about, instead of saying an end date 10 years ago, but kind of focusing on an end period, to give ourselves maybe a return of Parliament versus saying it has to be that September. We can look within a yearly period. It gives us the proper time to do the operationalization, as Michel talked about, so we can move in at the proper time for Parliament. That's one big thing.
The other one is the balance between security and operations. We want to make sure.... For example, we had some issues with the exterior doors on this building. Security requirements were very high to meet requirements for this building, recognizing that it caused many operational issues. These are lessons learned that we want to make sure are folded into the design of the Centre Block, as an example.