Regent of Thailand
A regent of Thailand (Thai: ผู้สำเร็จราชการแทนพระองค์) is a person who exercises the official functions of a monarch of Thailand when the monarch is incapable of functioning or during a period of interregnum. == Appointment == === Old royal customs === Ancient custom dictates that the heir to the last king rule only as a regent and not as a king until he is officially consecrated.