Thank you.
One thing that it is important to know is that ordinarily the estimates are tabled very shortly after the budget. So the recurring initiatives or new initiatives for which departments get funds cannot be presented in time for the main estimates, because the budget is introduced too close to those estimates. That is why departments that want approvals and authorizations have to go to Treasury Board, and then, once they have obtained their approvals, the funding request is made, the authorities convey the request to Parliament, and Parliament approves the funding and expenditures based on the authorizations given to the departments.
In a one-year cycle there is always a gap, a time lag, between when the funds needed for government initiatives are determined, when the departments receive their authorizations from Treasury Board, and when Parliament votes the funds so the spending can proceed in the proper manner.