I'll answer the question to the best of my capacity. I know the fiscal cycle inside and out, but I think the question is better directed to Treasury Board Secretariat to explain basically the cycle and the differences.
From my perspective on what happens, I consider the mains to be some kind of accounting exercise where all the approvals by the department that are known and available are submitted to Parliament for votes.
The plans and priorities include other items that come sometimes after the main estimates, items such as—