Because of his insanity, the constitution of Bavaria was amended on 4 November, 1913 to include a clause specifying that if a regency for reasons of incapacity had lasted for ten years with no expectation that the king would ever be able to reign, the regent could proclaim the end of the regency and the demise of the crown, with such action to be ratified by the parliament.
The following day, Otto was deposed by his cousin, Prince Regent Ludwig on November 5, 1913, by proclamation, who assumed the title Ludwig III. He was permitted to retain his title and honours. The parliament assented on 6 November, and Ludwig III took the constitutional oath on 8 November.