An heir presumptive is the person entitled to inherit a throne, peerage, or other hereditary honour, but whose position can be displaced by the birth of an heir apparent or a new heir presumptive with a better claim to the position in question.

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 …