 According to the Constitution Act, 1867, the Queen in Counsel (in practice the Cabinet of the United Kingdom) may instruct the Governor General to withhold the Queen's assent, allowing the sovereign two years to disallow the bill, thereby vetoing the law in question.This was last used in 1873, and the power was effectively nullified by the Balfour Declaration of 1926.Provincial viceroys, called "Lieutenants Governor" (plural) are able to reserve Royal Assent to provincial bills for consideration and possible disallowance by the Federal Cabinet; this clause was last invoked in 1961 by the Lieutenant Governor of Saskatchewan.