I can try a fairly high-level response to that question without, again, dealing with specific companies or specific concerns that might have been raised.
As a general approach, the enforcement of sanctions depends on, essentially, law enforcement agencies. That's the RCMP, and to a certain extent, the Canada Border Services Agency as well. If the department becomes aware of information that there are allegations that sanctions have been violated, that information can be passed on to law enforcement for them to take appropriate action. But it's very much a decision for law enforcement to make.