If I might, just let me clarify a little bit what “performance-based”, when we talk about it, really means.
The nature of engineering is about risk, and risk management, basically. In order to manage risk, one has to understand where it comes from and how it is constrained. So what we have basically identified here is that there are some things that you should know as policy-setters that you would take into account in making decisions. There are other things that are more related to the absolute capability to do a job, which are where the mandatory requirement recommendations come from.
So we have a circumstance where our job was to identify places where, as I said, in our view, the statement of operating requirements was unduly limiting the ability for options. That's really what it came down to. We pointed that out, and that's the essence of the report: if you want to create more options, you can do it, but if you're going to do that, then it means you have to make your decisions within the context of the risk tolerance that exists.
So it's about risk tolerance, at the end of the day, which is not our decision; it's a political decision.