Senator SINODINOS (New South Wales) (14:23): Mr President, I ask a supplementary question. I refer to a statement by Mr Rob Heferen, from Treasury's Revenue Group, in estimates, where he confirmed that there would be only three MRRT tax instalments in 2012-13. We have one remaining MRRT instalment due this financial year. The tax having raised only $126 million so far this year, how does the government expect to raise $2 billion in net terms, after deductions and allowances, from the only remaining instalment in 2012-13?