If I had to explain this in clear terms, I'd say that the budget the minister and government table in the House is probably more up to date than the main estimates, which are the focus of today's discussion.
The main estimates are a snapshot of the public finances and spending planned by the government departments and agencies as of March 1 st, whereas the budget is introduced in April. The main estimates are a document that lags behind the actual situation. The federal budget tabled by the minister is more up to date than what we're discussing today, which is the legislative instrument that funds the government's operations.