<Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> The Twelfth Amendment (Amendment XII) to the United States Constitution provides the procedure for electing the President and Vice President . It replaced the procedure provided in Article II, Section 1, Clause 3, by which the Electoral College originally functioned . Problems with the original procedure arose in the elections of 1796 and 1800 . The Twelfth Amendment refined the process whereby a President and a Vice President are elected by the Electoral College . The amendment was proposed by the Congress on December 9, 1803, and was ratified by the requisite three - fourths of state legislatures on June 15, 1804 . </P> <P> The Electors shall meet in their respective states, and vote by ballot for President and Vice-President, one of whom, at least, shall not be an inhabitant of the same state with themselves; they shall name in their ballots the person voted for as President, and in distinct ballots the person voted for as Vice-President, and they shall make distinct lists of all persons voted for as President, and all persons voted for as Vice-President and of the number of votes for each, which lists they shall sign and certify, and transmit sealed to the seat of the government of the United States, directed to the President of the Senate . </P>

Which amendment changed the rules by which the president and vp are elected