As I indicated in my overview, the NEB is a specialized tribunal and relies on a variety of people who have their own specialization. Therefore, each application is considered on its own merits and will be debated on its own merits. Dr. Steedman talked about how terrain is going to affect a certain application and how different conditions, whether it's the weather or the geography, etc., are going to be various considerations. There are all sorts of factors that are taken into account.
I'll turn to Dr. Steedman again to provide you perhaps more detail on what considerations are taken into account.