In an overview, the specific requirements for risk assessments for key routes and trains, which carry certain numbers of dangerous goods, etc., are very detailed and specific in terms of the factors that need to be considered. Those include things like the route, the grade of the slope, and the types of ground area, whether or not, for example, the rail route passes over a body of water, a fragile environmental area, and/or perhaps the source of water for a community.
There are requirements for how municipalities, who may have their own concerns and issues, can feed those into the railway as part of their risk assessment. That's now laid out in the actual requirements for key trains and routes in the rules. That is an important feature of how that part works. Generally, in the same kind of approach, looking under the safety management systems in other areas that are not covered by the key trains and routes, there is a requirement to do risk assessments and the same kinds of factors should be taken into account.
Then it's up to the railway to look at how those work. What are the risks? How would they mitigate those? When we look at them as part of our safety management system audits and our other inspections for the rules, we'd be looking at the sufficiency of those and whether they've been adequately dealt with. If not, there are other tools to be looked at.