Cyrus Vance - apparently unintentionally - left behind this document while meeting with Brazilian President Geisel. It lays out US negotiations with Argentina to ratify the Treaty of Tlateloco, to accept full scope safeguards and to delay the construction of a reprocessing facility in exchange for US nuclear assistance and Brazil’s acceptance of a moratorium on the construction of a reprocessing facility.

According to a US document left behind by Cyrus Vance, Argentina had agreed to ratify the Treaty of Tlateloco, to accept full scope safeguards and to delay the construction of a reprocessing facility in exchange for US nuclear assistance and Brazil’s acceptance of a moratorium on the construction of a reprocessing facility. Commenting the paper, Foreign Minister Silveira defines US strategy as “irresponsible” and considers it as an encouragement to the rivalry and confrontation between Argentina and Brazil.

Abreu reports a conversation in which ambassador Camillión revealed President Videla’s desire to visit Brazil, implying that Itaipu was a sensitive issue, but of domestic nature. The Argentine government suggested a joint declaration on nuclear issues to turn away international suspicions on "the production of the bomb."

In this cable to Buenos Aires, Ambassador Vazquez reports that he requested a meeting with Minister Olavo Setúbal after General Leonidas Pires Gonçalves suggested that he would support a Brazilian nuclear weapons program. Vazquez also discusses a conversation with the Brazilian Foreign Minister's chief of staff, who told Vazquez that General Leônidas Pires refuted the reports of a Brazilian atomic bomb.

This memo from the Argentine General Directorate of Nuclear Affairs and Disarmament to the South America Directorate proposes a joint Argentine-Brazilian declaration on the peaceful use of nuclear weapons. Rejecting the establishment of IAEA safeguards, the memo instead suggests a "mutual guarantee mechanism" based on cooperation and inspections on a case by case basis.