My understanding is that it occurs, yes, but I don't think there's a clear policy on it.
When I spoke to experts in the United States who were involved in this, they indicated that generally they have a lot of flexibility. In fact, they find that the Canadian program is much more structured in terms of legislation and policy. They've indicated to me that they have a great deal more flexibility in how they operate.
So I believe it does occur, but I can't tell you that there is any particular policy in regard to this or what that policy might be. My indication is that they don't generally operate pursuant to that kind of firm policy; rather, they have a great deal of flexibility.