I'm going to let Greg speak about the marine security working group, and I will jump very quickly to the Canada-U.S. relations. I think that's going to answer some of your questions.
Our relationship with the U.S. and the U.S. Coast Guard in conducting our mandate is very close and collaborative and very productive, whether it's in the north or anywhere else, whether it's environmental responses or security. This is demonstrated through a number of groups, meetings, treaties, agreements, and MOUs we have with the U.S. I could give you a couple of examples, but given the time, I won't get into those examples. Suffice it to say that we have a long-standing relationship with the U.S. Coast Guard. We meet regularly and we pick up the phone regularly from Ottawa to the regions. On operations, we work very closely together. There is no difficulty in that relationship. You have to have those kinds of relationships in operations, close relationships.
You asked why 300 tonnes and what happens with the balance of vessels that are smaller. I believe the rule that originally created the limit at 300 gross tonnage came from the International Maritime Organization, and its role and mandate was really focused on safety and risks associated with the safety of mariners and environmental protection.