 In 1924, King Vajiravudh (Rama VI) attempted to clarify the succession process by laying down the Palace Law of Succession.It was promulgated and came into effect in November 1924 as, in part, an attempt to eliminate the vagueness relating to succession within the Thai monarchical regime and to systematically resolve previous controversies.In 1932, after Siam became a constitutional monarchy, various amendments relating to succession were introduced.