Yes. This is one of those I mentioned, actually: TIH and nuclear materials. Because they require special handling, there are liability considerations that go into the setting of the rate and the tariff for the movement of those goods. If you have the good transferred from one railway to another railway, the mechanism for attributing those liability considerations becomes very complicated. That's why they were excluded. It's for that reason: because they do get into a conflict between what one railway may do and what the other railway was contracted to do.
On October 3rd, 2017. See this statement in context.