I see. They have also been given the power to say they think an accident is coming or an accident has happened, maybe. That's more likely the scenario. It's not predicting an accident. They've seen something that causes a concern. They think an accident may have happened. They order an evacuation. They order a whole bunch of work to be done. This is what clause 18 is for.
On November 30th, 2009. See this statement in context.