If I may.
The key thing is, if we want to put in a regime, who's going to fund it? Is it the public, or the private sector, and who is best placed to do that? The free market insurance can't cover that kind of incident, we know that. Spreading the burden so that everybody chips in seems to make the most sense, because it will not, hopefully, bankrupt any of the railways.
On the shipper versus the producer or the carrier debate, you have to keep in mind that a lot of dangerous goods, and more and more, are being imported. If the liability or the financial obligation is placed only on the person carrying it, they don't know what's being imported. We didn't know that crude oil would behave the way it did until Lac-Mégantic happened. Now we're realizing it's not the same thing; it has different properties.
The only person who knows the exact properties of what is being shipped is the person who manufactured it. The person in China, who is shipping chlorine through the country because we're not producing any more here...we're not sure what they're sending in. The railway companies don't test those shipments. They have to take them. There are risks there that it makes sense that everybody participate in this, not only the carrier.