The recommended levels don't come up with a number; they come up with a range and a risk assessment. Scientists are the risk assessors, and managers and the minister have to consider all of the advice in managing the risk. The risk assessment is done by science.
I can't recall the exact numbers in the scale that was provided. They don't come out with a point, as I said; they come out with a range, and they say that the low end of the range entails less risk, and here's the risk at that point, and at the high end you have more risk.
But I confess I can't recall the details of the scientific advice off the top of my head. We can certainly refer you to.... The scientific advice is on the web, and the stock status reports are there, so the committee certainly has access to the actual advice from scientists.