The official state car of the prime minister of Australia is a white ballistic and bullet-proof armoured BMW 7 Series, supported at all times by an armoured BMW X5. Prior to 2013, vehicles in the prime ministerial fleet were white Ford Territory and Holden Caprice models. The prime ministerial vehicle is also escorted by police vehicles from state and federal authorities. The prime minister's car bears the number plate C1 (meaning "Commonwealth One") and a centrally mounted Australian flag. The prime ministerial car fleet operates as part of COMCAR, a division of the Australian Government's Department of Finance.