We started with the initial plans, of which this was a part of a broader suite. It made sense with the plan to reuse the tree, to cut it before the sap started running. That was important. We had contracts in place to do the other tree, so it made sense to do it as one piece.
As I indicated, there's a suite of work that has to happen this spring and is essentially starting now. Three essential elements include archeological work; the removal of underground services, including an IT duct bank; and a construction road, which will enable Centre Block to go into rehabilitation. It will allow the decommissioning of Centre Block and enable the excavation work to proceed. Those are critical precursor projects.
All of that has to start this spring. At the very end—and it would cause challenges—as the visitor welcome centre is envisioned now, there's really no way to proceed in which the tree could remain, up to a maximum of the late summer.