Congress is empowered:
22. To approve or reject treaties concluded with other nations and international organizations, and concordats with the Holy See. 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. They shall only be denounced, in such event, by the National Executive Power after the approval of two-thirds of all the members of each House.
In order to attain constitutional hierarchy, the other treaties and conventions on human rights shall require the vote of two-thirds of all the members of each House, after their approval by Congress.
23.- To legislate and promote positive measures guaranteeing true equal opportunities and treatment, the full benefit and exercise of the rights recognized by this Constitution and by the international treaties on human rights in force, particularly referring to children, women, the aged, and disabled persons.
24.- To approve treaties of integration which delegate powers and jurisdiction to supranational organizations under reciprocal and equal conditions, and which respect the democratic order and human rights. The rules derived therefrom have a higher hierarchy than laws.
… (Sec. 75)