At the age of 75, he's the oldest monarch by the age at accession in South East Asia, surpassing King Maha Vajiralongkorn of Thailand who ascended the throne 11 months before at the age of 64 (Nawaf Al-Ahmed Al-Jaber Al-Sabah of Kuwait is the oldest in the world, age 83). He's also the shortest serving heir-apparent for only 8 months 28 days before ascending to the Throne. He was officially enthroned as the Sultan on 22 October 2018 and was awarded the sobriquet Al Aminul Karim in a televised ceremony, the first since 1959, at the Istana Anak Bukit's Balai Besar.