On December 29th, 2025, the National Executive Branch published Decree No. 921/2025 (“Decree 921”), which provides that the expansion works of the power transmission system (the “Expansion Works”) characterized as a priority by Resolution No. 715/2025 of the Ministry of Economy (see our comments here), will be carried through the procedure of National and International Public Tender under the terms of the Public Works Concession Law No. 17,520.
This process is framed within the Resolution No. 311/2025 of the Secretary of Energy (see our comments here) and recently incorporated Article 31 bis of Law No. 24,065 (through the amendments made by Decree No. 450/25) which introduced within the power transmission system expansion modalities for the Argentine Interconnection System (“SADI”), the modality established by Law No. 17,520, as amended (see our comments here).
In that regard, Decree 921 designates the Ministry of Economy as Enforcement Authority of the concession agreements and empowers the Secretary of Energy to, among other faculties, approve tender specifications, launch the open call for bids and execute the awarded concession agreements.
Prior to the open call, the Secretary of Energy shall update the power regulation to include transmission expansions via public works concession and prepare the tender documents of the following Expansion Works: (i) AMBA I, (ii) 500 kV Río Diamante – Charlone – O’Higgins Line; and (iii) 500 kV Puerto Madryn – Choele Choel – Bahía Blanca Line.
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For additional information, please contact Nicolás Eliaschev, Javier Constanzó, Daiana Perrone, Macarena Becerra Martínez, Victoria Barrueco, or Manuel Crespi.