Mr. Bob Bleaney at the Transport, Infrastructure and Communities Committee

I can start with this question and I'm going to pass it on as well to Dave.

The quick answer is yes, Bakken crude demonstrates more volatile characteristics. It has higher light ends in its crude mix, but that's exactly why the testing procedures are being looked at very carefully, to ensure that it is being properly monitored.

I will pass this on to Dave to expand on that further if you like.