The state's constitution proclaims the Yang di-Pertuan Besar, Undang of Sungei Ujong, Undang of Jelebu, Undang of Johol, Undang of Rembau and Tengku Besar Tampin are vested with the Executive Power of the state, are the Head of the Religion of Islam in the state and are the fountain of all honour and dignity for the state. The current Yang di-Pertuan Besar is His Royal Highness Tuanku Muhriz ibni Almarhum Tuanku Munawir. His Royal Highness succeeds Almarhum Tuanku Jaafar Ibni Almarhum Tuanku Abdul Rahman who died on 27 December 2008.