I'll try to answer that question, but on a very high-level basis, because clearly a regulatory oversight body could give you better clarity in terms of that. Under BREA, for instance, it's the National Energy Board officer who is leading and chairing the working group looking at oil spill and emergency response.
A great deal of research on ice-infested waters and ice-covered waters has gone on over decades. You can look to many reports. The most recent report I saw only yesterday, and I haven't read it through. There's a joint industry program, and the American Petroleum Institute has laid out all of the research and studies and investigations that have gone on over the years.
Ultimately, I think you'll see that the NEB is going to require that response plans have a contingency of various types of techniques to deal with a spill, because there are going to be variables that change daily. You're going to have to look at being able to switch among in situ burning, dispersants, skimming, and recovery in those sorts of conditions. In some instances, many experts will say that ice containment actually facilitates recovery because it captures the spilled oil.
It's not a “one size fits all”. There are a variety of techniques. Obviously, in some situations it is more challenging than it is in the open seas, but clearly all of those techniques that you would use, for instance, in the Gulf of Mexico you would also use in the north, in the Beaufort, for instance.