There is a variety of ways. It could come to the attention of the investment review division of Industry Canada. The parties themselves can submit a notification form or an application for review to the government, and that would trigger a review. If, for example, there were a desire to go through a review process in order to have certainty on the outcome, as opposed to having completed an acquisition only to find, after the fact, that there is going to be a review and a potential remedy, buyers who are risk-averse would certainly prefer to go through the review up front to make sure that they know what the outcome of a review is going to be.
Otherwise, it would be the government monitoring the media, receiving complaints, etc. We've had experience of the government proactively contacting us and saying: we read about this transaction in the media and we understand it's happening; can you provide us more information?
But there is no threshold for “review for national security” transactions—the $300 million that you referred to—and so there is no mandatory upfront review process that investors have to go through, as they do for assessing net benefit.