Conference of Rulers
Mizan was appointed Deputy Yang di-Pertuan Agong on 26 April 1999 after Sultan Salahuddin Abdul Aziz Shah, the Sultan of Selangor was elected the 11th Yang di-Pertuan Agong by the Conference of Rulers. Following the illness and subsequently death of Salahuddin, Mizan served as Acting YDPA from 8 October to 12 December 2001.