Last evening when the division on the Passenger Movement Charge Amendment Bill 2016 was called, Senator Hanson and I were just leaving her office to attend a function. We returned to the office to view the television monitor and mistakenly believed that the quorum bell was ringing again, as it had done a few minutes earlier. Senator Hanson and I proceeded to the function without realising that a division was taking place on the Passenger Movement Charge Amendment Bill. Had I been in the chamber, I would have voted in favour of the bill, with my colleagues Senator Roberts and Senator Culleton. I apologise for the inconvenience caused to the Senate.