List of current heirs apparent
This is the list of current heirs apparent to the thrones of the world as of . In federal monarchies. Malaysia. The State of Negeri Sembilan Darul Khusus does not have an heir apparent, as the ruler of Negeri Sembilan, known as the Yang di-Pertuan Besar of Negeri Sembilan, is elected by a council of the four Undangs of Sungai Ujong, Jelebu, Johol, and Rembau. The rules of succession in Perak Darul Ridzuan are more complicated than in other Malay states. After a sovereign is appointed and installed he will appoint the Raja Muda (heir  apparent) and Raja Di Hilir (heir presumptive) on the advice of the Dewan Negara (Royal Council). The reigning Sultan appoints princes of the blood (Waris negri) to certain high princely titles for life. They are arranged in a strict order of precedence indicating the order of succession to the throne. The relative precedence of these titles has altered from time to time, and additional titles have been included and removed. However, the current order, as confirmed on 25 February 1953, stands as follows: On the death or promotion of an existing titleholder, the holder of the next most senior title , succeeds. On the death of a reigning Sultan, the prince holding the title of Raja Muda, the senior prince in the hierarchy, succeeds him. The prince holding the title of Raja di-Hilir becomes the new Raja Muda. The Raja Kechil Besar becomes Raja di-Hilir, and so on. The new Sultan may then appoint his own nominee to the most junior title made vacant by these successions.