If I can perhaps be helpful here, the estimate of $2 a tonne was preliminary, based on maintenance costs submitted by the railways that were based on their 2003 costs. They were not as such audited. They were an estimate.
When we get the legislation, we will do the detailed cost and we'll audit the railway's material. There may be some adjustment to the $2 a tonne. How much will it be? I'm not sure. We can't really tell you, and if you press us, my guess would only be a guess.