Ok. It isn't my intent to nitpick. Unfortunately, a manifestation of a mental illness is a medical event as well. I don't share the confidence in stats and reaction times that others do. In the event of a mechanical or electronic disturbance, time is of the essence and every minute counts. It could take several minutes for the pilot on break to get back into the cabin, especially if the plane is undergoing a crisis upfront, e.g. turbulence, sudden change in direction. It's happened before and will happen again. Windows crack, electrical devices short circuit, birds impact the flight deck and electronics malfunction.

Porter, Finnair and the US Airlines all had good reason to have had the policy in place and it is somewhat surprising that it took this tragedy to compel the Canadian airline industry to act. It is bizarre that there wasn't even a proper policy in place at some airlines, such as Air Transat.