It is an iterative process. Natural Resources Canada does establish the policy framework under which the National Energy Board operates. As part of that, there's an ongoing dialogue between the regulator and us in Ottawa in terms of that framework and the opportunities to improve that framework going forward.
Obviously, we rely heavily upon the expertise of the NEB in terms of technical matters and how we can strengthen technical aspects of that system going forward. There are a number of different tools with which that can be done: through working through the development of new standards, through new regulations, through legislative changes, or through the NEB's technical review of pipeline matters.
The example of valves in terms of environmentally sensitive areas is a very technical question and issue. The NEB probably could spend a lot of time trying to define the considerations that go into those valve placements, but it does play into their overall safety mandate in determining exactly where those valves should be located in terms of environmental protection and also in determining the risks of creating additional weak spots in the pipeline going forward that could create additional risks of a spill.
There are a bunch of considerations in there, and we work iteratively in terms of ongoing conversation.