One of the things that might be helpful, to speak to this point, is to talk about the various responsibilities of the custodial departments, because you're really talking about the whole of the government inventory in terms of its real property holdings. The Federal Real Property and Federal Immovables Act basically provides a minister with the authority to hold real property in order to support programs. The minister has a responsibility for administering that property.
As well, there's something at the Treasury Board called the real property management framework policy, which also vests with deputies of those departments the full authority and stewardship responsibilities for their particular suites of assets, which include real property and in some cases include other tangible assets, such as cars.
That's just to say that when it comes to questions about managing a particular portfolio of buildings in a particular department, that decision on whether to replace those windows, although it's certainly influenced by the types of initiatives that Margaret and her team have been undertaking in terms of the greening of government operations, is really a decision that is taken by the individual custodial department.
So in the case of Public Works, if it's a Public Works building, the decision would be taken by that department. Au contraire, if it was a Health Canada building—Health Canada owns many laboratories—it would be Health Canada that would be responsible for making that investment decision. There's a whole series of things that they would factor in to determine whether it was best value, the right priority, and the right stewardship decision for their department at that point in time.