In this particular model, you would only vote for the $25 million. We have actually referred to that as a weakness of all these approaches, unless Parliament is willing to provide multi-year voting authority. The fact is that for this department, in year one, you are voting $25 million, and the department is now on a train to spend $75 million next year. But Parliament has not voted that. In principal, one could be left with $25 million of disbursement. If the $75 million doesn't follow through, that $25 million may not have as much disposal value. But that is how Parliament currently votes--year by year--and not all assets can be purchased in one year. You would vote the $25 million, then vote the $75 million.
Evidence of meeting #25 for Government Operations and Estimates in the 39th Parliament, 1st Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was model.
A recording is available from Parliament.