Constitution of the Nation of Argentina

Article 31

This Constitution, the laws of the Nation enacted by Congress in pursuance thereof, and treaties with foreign powers, are the supreme law of the Nation; and the authorities of each province are bound thereby, notwithstanding any provision to the contrary included in the provincial laws or constitutions, except for the province of Buenos Aires, the treaties ratified after the Pact of November 11, 1859.

Article 75, paragraph 22

(…) Treaties and concordats have a higher hierarchy than laws. The American Declaration of the Rights and Duties of Man; the Universal Declaration of Human Rights; the American Convention on Human Rights; the International Pact on Economic, Social and Cultural Rights; the International Pact on Civil and Political Rights and its empowering Protocol; the Convention on the Prevention and Punishment of Genocide; the International Convention on the Elimination of all Forms of Racial Discrimination; the Convention on the Elimination of all Forms of Discrimination against Woman; the Convention against Torture and other Cruel, Inhuman or Degrading Treatments or Punishments; the Convention on the Rights of the Child; in the full force of their provisions, they have constitutional hierarchy, do no repeal any section of the First Part of this Constitution and are to be understood as complementing the rights and guarantees recognized herein. (…)