The insurance approval for a self-arming immobiliser is known as "Thatcham 2" after the Motor Insurance Repair Research Centre in Thatcham, England.
私人安装的锁止系统的保险许可证被称为“Thatcham 2”，这个名字源于座落在英格兰伯克郡薩徹姆的汽车保险维修研究中心。