Mercosur Countries Finalize Legislative Procedures for EU Agreement
Foreign companies looking to invest in Germany should take note of the recent developments surrounding the Mercosur agreement. On March 31, 2026, Mercosur announced a significant legal milestone: the completion of internal procedures by Argentina, Brazil, Paraguay, and Uruguay that will allow for the provisional application of the interim agreement starting May 1, 2026. This pivotal moment indicates that the South American nations have officially concluded the necessary legislative and administrative steps to implement the agreement, which was signed on January 17, 2026. The interim agreement explicitly allows for provisional application, a common mechanism in international economic law, as outlined in Article 23.3 of the interim agreement and consistent with Article 25 of the Vienna Convention on the Law of Treaties.
For German companies, this development carries concrete legal implications, particularly in terms of enhanced market access to Mercosur countries from May 1, 2026. The early activation of the trade pillar, which includes tariff reductions and investment facilitation, is a crucial advantage that can significantly influence business operations and strategies across the region.
Legislative Procedures Across Mercosur Nations
Each Mercosur member state follows distinct legislative processes to integrate international agreements into their national legal systems. A noteworthy difference lies in the executive's role in these procedures. In all countries, however, parliamentary approval of the agreement is required, whether through law or decree. After publication in the respective official gazettes, the sequence of completion for these procedures is as follows:
In Argentina, the internalization of international treaties is governed by Article 75, Section 22 of the Argentine Constitution. The Argentine Congress has the ultimate authority to approve international agreements. After passing through both houses of Congress, the agreement was ratified and transformed into Law 27.800, which was published in the official gazette on February 26, 2026. This law represents the central act of internalization for the interim agreement in Argentina.
Uruguay's legislative framework, defined by Articles 85 and 168 of its Constitution, mandates that international treaties require prior parliamentary consent for internalization. The Senate and the House of Representatives approved the procedure on February 27, 2026, followed by the proclamation of Law 20.462 on March 4, 2026, thereby affirming the interim agreement.
Brazil's internalization process, detailed in Article 49, Item I, and Article 84, Item VIII of the Brazilian Constitution, involves both the Parliament and the President of the Republic. The National Congress must approve the agreement, which then requires the President's endorsement to have definitive internal effects. The interim agreement was duly presented to both the House of Representatives and the Senate, receiving their approval. The critical step was marked by the proclamation of Legislative Decree No. 14, published in the official gazette on March 17, 2026. Although the interim agreement has been internalized, its future ratification now hinges on an act by the President of the Republic.
In Paraguay, the process of internalizing international treaties is based on Articles 141 and 202 of its Constitution. Here, the executive and legislative branches share responsibility. The process commenced with Message No. 361 submitted to the National Congress on January 29, 2026. The Senate and the House approved the agreement on March 4 and March 17, 2026, respectively. The President's proclamation on March 30, 2026, marked the conclusion of internal procedures, allowing for the provisional application of the agreement.
Argentina, Brazil, Paraguay, and Uruguay each operate as sovereign nations with independent legal systems, which in turn influence the functioning of Mercosur as a whole. Both Argentina and Brazil hold a unique legal and historical significance within Mercosur, having been the original signatories of the Asunción Treaty that established the bloc. Uruguay hosts the headquarters and administrative structure of Mercosur in Montevideo, playing a vital role in implementing strategic initiatives, while Paraguay serves as the custodian of Mercosur treaties and is home to the Permanent Mercosur Review Tribunal, responsible for dispute resolution.
The completion of internal procedures by these four Mercosur countries creates a highly relevant legal scenario, facilitating the provisional application of the interim agreement and paving the way for the subsequent ratification of the EU-Mercosur agreement. The swift and coordinated process adhered to all requisite legal protocols, reflecting the strategic priority this issue holds for the Mercosur nations.
As reported by gtai.de.
