I think the core instrument of input that Parliament would have would be in respect to the process of review of the detailed main estimates. Committees will undertake this now through the fall, since the reports on plans and priorities will be tabled in September--that is the plan. Then the full supply vote would take place in mid-December. Each of the standing committees will review main estimates for each of those 122 appropriation-dependent agencies.
I don't want to brief committee members on parliamentary procedure, but fundamentally there is a vote. Those votes come back to the House, so every item of spending that takes place will be voted on and Parliament expresses its approval or otherwise through those votes.