Abstract

The cooperation prior the integration process replaced the concept of sovereignty. The governments of Latin American countries could not stand away from it and during the last decades had been trying to introduce different models, mainly of economical character. The origins of successful integration process are related to the basic laws. The advancement degree of integration process within Mercosur area and the character of the law norms described it in the basic laws had been directly related to its period of validity, and particularly with the fact if a constitution was enacted before or after signing the Treaty of Asunción, where it was clearly indicated that the process of integration should be started. The analysis of the member states basic laws indicates the lack of the consequence in using specific terminology and the significant differences between members-parties. Changes and amendments that have been made in the constitutions of the members-parties should be given a positive assessment. However, all the changes where not enough to deepen the integration. The introduction of changes had only allowed to legitimate arrangements already made, at the same time not allowing for the