Typically, the state of design will look at the event that happened with an aircraft and propose a mitigation measure based on their risk analysis and what they see needs to be done to mitigate that risk.
The FAA proposed a mitigation measure through an AD, an airworthiness directive. States looked at that AD and accepted it. That's the usual practice. Less usual is when a state will look and say that they'll accept that AD, but that there's also something more that they may wish to do.
Canada accepted that AD absolutely. We agreed with what the FAA was putting forward, but we worked with our three Canadian operators, Air Canada, Sunwing and WestJet, to further address the issues we saw around ensuring that our aircrew had the appropriate reaction time to this event and knew the appropriate procedures to mitigate this runaway trim stabilizer procedure. We said we're going to make a change. Aircrew had to memorize all five steps to mitigate that risk, as opposed to what was currently there, where they would memorize—or they were told to memorize—two of those five steps, and the other steps were available within the quick reference handbook on the flight deck.
We put that measure in place on November 8, 2018. It was implemented with all our airlines on November 9, 2018, about a week and a couple of days following the Lion Air accident.