I can start it from a policy perspective, and then Mr. MacDonald can talk from the operations side.
From the policy perspective, it depends on the issue. If we're talking about national security issues related to admissibility, that's kind of a different group. But it's a very similar group to the ones you see listed here, relative to countering violent extremism, for instance, when we're looking at extending the group beyond the traditional security intelligence community, to include departments like Canadian Heritage, Human Resources and Skills Development, and so on.
Public Safety takes a lead role in many of these issues, in many of the different ways of slicing national security, coordinating and leveraging expertise federally and working with the provinces and so on. The Privy Council Office also has a major role with the office of the National Security Advisor.
There are typically working groups, as you can imagine, with large numbers of people in the room, and they're fed upward through the director, director general, assistant deputy minister, and deputy minister levels. There are different committees, depending on what the issue is, and that feeds into advice to cabinet. A lot of our time is spent coordinating with other departments and agencies, for sure.