The Congress, whenever two thirds of both Houses shall deem it
necessary, shall propose Amendments to this Constitution, or, on
the Application of the Legislatures of two thirds of the several
States, shall call a Convention for proposing Amendments, which,
in either Case, shall be valid to all Intents and Purposes, as
Part of this Constitution, when ratified by the Legislatures of
three fourths of the several States, or by Conventions in three
fourths thereof, as the one or the other Mode of Ratification may
be proposed by the Congress; Provided that no Amendment which may
be made prior to the Year One thousand eight hundred and eight
shall in any Manner affect the first and fourth Clauses in the
Ninth Section of the first Article; and that no State, without
its Consent, shall be deprived of its equal Suffrage in the
Senate.