Succession to the throne
Bhumibol's only son, Prince Vajiralongkorn, was given the title "Somdej Phra Boroma Orasadhiraj Chao Fah Maha Vajiralongkorn Sayam Makutrajakuman" (Crown Prince of Siam) on 28 December 1972 and made heir apparent to the throne in accordance with the Palace Law on Succession of 1924.