It also raises that point--why other countries don't consider this needful in terms of their security interests--as one aspect of this, and of course it raises the point about the exception. I'm afraid the exception of Canadian overflights domestically is incredibly vulnerable if the argument is supposedly that this is needful for security.
Simply put, it either shows that it is not needful that we have an exemption or that the exemption will be vulnerable if they insist upon that point. So we are in a very sticky place relative to something that is completely Canadian, relative to Canadian sovereignty, which is our ability to transit our very large country, geographically located where it is with air transit passages as they are.