I've just had a discussion with Sue, and she can correct me if I'm wrong. I'm not aware that they're required to carry insurance.
Obviously most large energy companies do look after their own insurance needs, but I'm not aware that there is an actual requirement for them to carry a certain amount of liability insurance such that in fact the operator is required by law to carry not the full $650 million, and this comes back to Madame DeBellefeuille's question. I think 50% of it is required to be carried as insurance, and then that other 50% can be self-insured or arrived at through other agreements.
They have to be able to meet $650 million per incident, but with respect to any other large infrastructure, I'm not aware if they're actually required to carry liability insurance. We would get a more specific answer and get back to you if you'd like.