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.