Senator BIRMINGHAM (South Australia—Minister for Education and Training and Manager of Government Business in the Senate) (14:25): I don't agree with the term 'water stolen', but I did acknowledge in my first answer that, indeed, the northern basin is often disconnected from the southern basin in times of low inflows into that system. Of course, it is correct that, of the 70-gigalitre adjustment proposed to the northern basin, on average a very small proportion of that—only a few gigalitres—would, in fact, ever make it to the southern basin and potentially through to the Lower Lakes. That is, indeed, one of the reasons why many of the claims that have been made by the Greens in particular and some of those opposite are claims that are misplaced, are claims that misinterpret the science and are claims that ignore the reality that the northern basin— The PRESIDENT: Senator Hanson, on a point of order. Senator Hanson: Senator Birmingham, you haven't commented on the part of my question about also breaching section 100 of the Australian Constitution. The PRESIDENT: Senator Hanson, as I've said before, I cannot instruct the minister how to answer a question as long as he remains directly relevant to the terms of it, and he was. Senator BIRMINGHAM: Everything that has been done in relation to the construction of the Murray-Darling Basin Plan has been in accordance with the Australian Constitution, including the referral of certain powers made by the states and territories to the Commonwealth to enable the passage of the Water Act back in 2007.