Just to put this in perspective, a cruise ship—and it must seem a long time since we've looked out of the windows and seen a cruise ship coming in here. But one cruise ship coming into Wellington Harbour is the equivalent of 200,000 extra cars driving on an average day around Wellington—just to give you some idea of what a piece of legislation like this is meant to deal with. It does ensure that when these ships arrive, what they have traditionally done is they've used high sulphur fuel, which is 3.5 percent by mass, and that will now be required to be 0.5 percent. Why, you might ask. Well, it's all about price. Obviously, the higher sulphur fuel is considerably cheaper than the lower sulphur fuel. So the scrubbers that are required, once they're in New Zealand waters, to cleanse it—those scrubbers will actually literally take the sulphur out of it, and once they arrive in New Zealand, they're required to cleanse it.