Perhaps I can try it.
It's Treasury Board Secretariat's job to know how much spending is authorized for defence, and to work with Parliament to get Parliament's votes in support of those plans.
The Department of Finance takes from Treasury Board Secretariat the amount that the Department of Finance currently, with current cabinet approvals and Treasury Board approvals, has approval for, for next year. That includes things like policy approvals, but also other adjustments, like, for example, compensation. So the Department of Finance takes it from us for that department.
As for all other departments, they look at that overall. One of their jobs is to decide if that is affordable for the government when we add it all up. It then comes back through to cabinet that we can afford all that plus more, or that we can't afford all that, and then further decisions are taken.
When the budget is made, we go back to the Department of National Defence, in this case, and say they have authorization to continue—