<P> Chapter III of Title III of the Constitution deals with the executive branch of government and sets forth the powers of the president, as well as the qualifications for the office . He is vested with the "supreme executive power of the Union". </P> <P> To be eligible to serve as president, Article 82 of the Constitution specifies that the following requirements must be met: </P> <Ul> <Li> Be a natural - born citizen of Mexico ("mexicano por nacimiento") able to exercise full citizenship rights, with at least one parent who is a natural - born citizen of Mexico . </Li> <Li> Be a resident of Mexico for at least twenty (20) years . </Li> <Li> Be thirty - five years of age or older at the time of the election . </Li> <Li> Be a resident of Mexico for the entire year prior to the election (although absences of 30 days or fewer are explicitly stated not to interrupt residency). </Li> <Li> Not be an official or minister of any church or religious denomination . </Li> <Li> Not be in active military service during the six months prior to the election . </Li> <Li> Not be a secretary of state or under - secretary of state, attorney general, governor of a State, or head of the government of Mexico City, unless "separated from the post" (resigned or been granted permanent leave of absence) at least six months prior to the election . </Li> <Li> Not have been president already, even in a provisional capacity (see Succession below). </Li> </Ul> <Li> Be a natural - born citizen of Mexico ("mexicano por nacimiento") able to exercise full citizenship rights, with at least one parent who is a natural - born citizen of Mexico . </Li>

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