Billy Bob is a famous Australian musician who has failed to pay his $800,000 income tax payable which has accumulated over the last three income years. Billy Bob is thinking of leaving Australia, moving all of his money into a Swiss bank account and transferring his assets into his wife's name. What can the Commissioner do to stop him doing this? (Select more than one, if appropriate.) Issue a Mareva order Write a letter of demand Initiate urgent legal proceedings in court Seek a departure prohibition order Audit Billy Bob again