To use another analogy: we were talking about house auctions before. One way to think about this is that the Government, essentially, establishes and regulates a number of markets. One of those is the electricity market. There are a number of mechanisms which are very similar between the way that the electricity market operates and the way that this operates. So you could no more argue that the price of a New Zealand Unit is a tax than you could argue that your price of electricity is a tax, right? You would be saying, "Well, I'm being taxed on my use of electricity." Well, that's just the price that you pay for the service that you receive of electricity. So I think the distinction is very clear.