Constitutional monarchy Act 1689, which placed similar limits on the Scottish monarchy. Although Queen Anne was the last monarch to veto an Act of Parliament when, on 11 March, 1708, she blocked the Scottish Militia Bill, Hanoverian monarchs continued to selectively dictate government policies. For instance King George III constantly blocked Catholic Emancipation, eventually precipitating the resignation of William Pitt the Younger as prime minister in 1801. The sovereign's influence on the choice of prime minister gradually declined over this period, King William IV being the last monarch to dismiss a prime minister, when in 1834 he removed Lord Melbourne as a
Veto only to stop changes (thus allowing its holder to protect the status quo), like the US legislative veto mentioned before, or to also adopt them (an "amendatory veto"), like the legislative veto of the Indian President, which allows him to propose amendments to bills returned to the Parliament for reconsideration. The concept of a veto body originated with the Roman consuls and tribunes. Either of the two consuls holding office in a given year could block a military or civil decision by the other; any tribune had the power to unilaterally block legislation passed by the Roman Senate. The institution