Senator WONG (South Australia—Minister for Finance and Deregulation) (14:21): Again, many aspects of that question asked about international pricing of carbon, which— Senator Cormann: I specifically asked if Treasury considered— Senator WONG: If you would let me finish, Senator Cormann. These are questions which are more properly addressed to Senator Ludwig— Senator Cormann: Because this is on the economic impact of the carbon tax— Senator WONG: I do not know why it is such a problem to ask Senator Ludwig questions. He is very good at answering them. You always tell me how bad I am at answering them and now, quite clearly, Senator Ludwig could answer them— Honourable senators interjecting— The PRESIDENT: Order! Senator Brandis: Mr President, I rise on a point of order. As you have ruled before on several occasions, it is not proper for ministers to comment on the questions. The question that Senator Cormann asked had three parts, and each was directed to an inquiry as to whether Treasury—whom this minister represents here—took into consideration certain international comparators. She has not approached the question. She has done nothing but indicate that she is not prepared to answer the question because she asserts it should have been addressed to another minister. The fact is that only this minister can tell the Senate what Treasury took into account. The PRESIDENT: Order! I do draw the minister's attention to the question. The minister has 41 seconds remaining. Senator WONG: In terms of what Treasury did and did not take into account, as the senator would know, we have published the Treasury modelling and the assumptions contained within that. It contains a great deal of information, including the assumptions about policy action taken in other countries.