A convention to propose amendments to the United States Constitution, also referred to as an Article V Convention, state 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: on the Application of two thirds of the State legislatures (that is, 34 of the 50) the Congress shall call a convention for proposing amendments, which become law only after ratification by three-fourths of the states (38 of the 50).