I think we do want to have a relative period of stability in the price of carbon, and it is appropriate that there be a reserve price. I think just about anyone who ever sells another valuable asset by way of a tender or auction reserves the right to reject unduly low offers that don't reflect the vendor's view as to what the minimum should be. When you auction a house you have a reserve, when you auction the house you don't tell the people that are coming up to the auction what the reserve is. They find that out by whether the auction is passed in or not, because the reserve is kept confidential to the vendor and the vendor's agent. So that's essentially what is being proposed here.