A convention to propose amendments to the United States Constitution, also referred to as an Article V Convention or amendatory convention; is one of two methods authorized by Article Five of the United States Constitution whereby amendments to the United States Constitution may be proposed: two thirds of the State legislatures (that is, 34 of the 50) may call a convention to propose amendments, which become law only after ratification by three-fourths of the states (38 of the 50). The Article V convention method has never been used; but 33 amendments have been proposed by the other method, a two-thirds vote in both houses of Congress; and 27 of these have been ratified by three-fourths of the States. Although there has never been a federal constitutional convention since the original one,