There are really two outside entities. The first is the customers. If the customers don't agree with it, we won't do it.
A subset of that, in our case in particular, would be the pilots and sometimes even the pilots' unions, who attend our consultative sessions and take part in them. They get to see and sign on or disagree with our technology before we'll do it. So those people who are paying the freight--and indeed, in the case of the pilots, you could say they're betting their lives on it--have effectively, in our business, a veto.
Second is our safety regulator, Transport Canada. These things have to pass muster with them as well.