Senator BIRMINGHAM (South Australia) (14:19): Mr President, I ask a supplementary question. I refer again to the ANAO report, which found that departmental systems being run under your government contained 'significant security vulnerabilities' which could allow outside corruption of emissions data. I note the minister's statement that the government has accepted all of the recommendations of the Audit Office, but will they all have been implemented before companies are expected to start paying billions of dollars in carbon tax?