A control order is an order made by the Home Secretary of the United Kingdom to restrict an individual's liberty for the purpose of "protecting members of the public from a risk of terrorism". Its definition and power were provided by Parliament in the Prevention of Terrorism Act 2005. Control orders were also included in the Australian Anti-Terrorism Act 2005. The Prevention of Terrorism Act and control orders were repealed in December 2011 by the Terrorism Prevention and Investigation Measures Act 2011.