It currently comprises 353 municipalities of the following South American countries: Argentina, Brazil, Bolivia, Chile, Colombia, Ecuador, Paraguay, Peru, Uruguay and Venezuela.
The mayors who participated in the meeting, which was convened by the Union of Ibero-American Capital Cities–Southern Cone Sub-region, signed the so-called Declaration of Asuncion, where they expressed the need to create a forum for cooperation among municipalities.
The founding members were the cities of Asunción, Rosario, La Plata, Cordoba, Buenos Aires, Florianópolis, Porto Alegre, Curitiba, Rio de Janeiro, Brasília, Salvador and Montevideo.
During the Assembly the annual Work Plan is approved, the authorities of that new period assume, and it is at the same time an instance of contact with various regional and world organizations interested in carrying out joint actions.
The thematic vice-presidencies participate with the right to speak and vote in the Executive Directorate, represent the Network in various regional and international spaces, and assist the President in his responsibilities.
The thematic instances disseminate successful experiences, contribute to the formulation of public policies, and promote research.