To cut to it, timing is the reason why supplementary estimates are utilized by the department to revise its spending levels. Input into the main estimates is really required in the fall. However, new funded initiatives that could support, for example, the federal budget emerge in the winter. The only manner in which the funds can actually be accessed for the upcoming fiscal year is through one of the supplementary estimates. It's really a case of timing.
Also, some of these items within our supplementary estimates relate to certain events or activities that are actually time-sensitive. Requests to re-profile resources from one fiscal year to another could be required to accommodate changes in the number of forecasted applications, for example.