Arizona law requires the installation of ignition interlock devices in the vehicles driven by those convicted of DUI in the state. The new revisions to the law allow for lesser jail sentences if the individual agrees to have an ignition interlock device installed in their vehicle. The installation would be mandatory for any conviction but if the convicted agrees to an extended installation, they can have their jail sentence suspended sooner rather than later. Prior to this change, an Arizona extreme DUI conviction, required at least 30 days served in jail before suspension could be granted for further jail time.