If I could add to that, I agree with everything Martin said.
I think it's important to recognize that these larger-scale projects, which will only be a small fraction of the total, can have significant impact and therefore should be a part of our overall set of things that we're doing in the country, but there are questions that set them aside from the more normal scale of projects that you're dealing with.
When you're trying to make the decisions in the first place--because very often there are large amounts of money, which are often intergovernmental in terms of support that's required, but are also, in many cases, interdisciplinary in their support--you then have a question, when you start to build such a large facility, of whether you are able to build this facility that is at the very cutting edge and of its nature, therefore, has uncertainties as to whether you can achieve what you are attempting to achieve within the original estimates of what it is going to cost. You need to have overview during the construction phase and commissioning; then, when you go into operation, you need to have a mechanism that's been identified in the first place as to how you will be covering these costs. A separate thing could be very valuable.
Finally, you have to know when these projects have finished their worth and are going to be shut down, because they have become an institution at that point. Therefore, setting them aside by having a mechanism that could be working within existing agencies or could be completely separate is the thing that's essential for this small subset of things that are going to be of a large scale but at the cutting edge.