The Preparatory Commission held a total of four sessions, the last of which took place just under two years after its creation, from 31 January to 14 February 1967.

The system adopted in the Latin American instrument proves that, although no state can obligate another to join such a zone, neither can one prevent others wishing to do so from adhering to a regime of total absence of nuclear weapons within their own territories.

The Preparatory Commission held a total of four sessions, the last of which took place just under two years after its creation, from 31 January to 14 February 1967.

From those few pending questions which the Commission would be called upon to solve at its fourth session, the most important one was the entry into force of the treaty.

Furthermore, the Latin American nuclear-weapon free zone which is now nearing completion has become in several respects an example which, notwithstanding the different characteristics of each region, is rich in inspiration.