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up to date · reviewed Jul 12, 2026
In force since May 10, 2023

San Matias Gulf: the law that opened the coast to the export corridor

Ley 5594 (2022)
in forcePROVINCIAL Energy and natural resources

Ley 5594 keeps exploration and production banned in Golfo San Matías, but allows pipelines, storage and loading terminals.

The other rules on this subject43

Energy: free export of hydrocarbons and gasDecretos 1057/2024 and 1060/2024in force
The State reorders the trunk gas pipelines and forces firm transportation contracts to be redrawnRes. SE 66/2026 (Official Gazette, Mar 13, 2026) + Res. ENARGAS 409/2026in execution
Hydrocarbons: the pre-export local offer fallsSE Res. 166/2026 (Official Gazette, Jul 22, 2026)in force

What changed and who it applies to

What changed
Art. 15 rewrites art. 1 of Ley M 3308 and leaves only oil and gas «prospecting, exploration and exploitation» prohibited in the San Matías Gulf and Río Negro's territorial sea. Pipeline transport, storage and loading/unloading terminals are regulated by the law itself: prior approval from the provincial authority, oversight by the Hydrocarbons Secretariat and the goal of encouraging Río Negro local procurement. Without this law there would be no VMOS terminal at Punta Colorada, no LNG liquefaction vessels and no San Matías pipeline thesis. verif Sep 9, 2022 ↗
In force
In force since October 2022 verif. Challenged in court without success so far: the provincial Superior Court (STJ) rejected the unconstitutionality action on May 10, 2023 for lack of standing, without ruling on the merits prob. prob May 10, 2023 ↗
Who it applies to
Anyone who applies for or holds a hydrocarbon transport concession, national or provincial, or an authorization to build, operate or use a transport system starting, ending or running in Río Negro (art. 4): it imposes prior provincial approval on them (art. 5) and provincial oversight concurrent with the national one (art. 2). In practice, the entire export corridor: VMOS (terminal and single-point moorings), Southern Energy (liquefaction vessels and dedicated pipeline), Argentina LNG and the San Antonio port logistics chain thesis. verif 2022-2026 ↗
The norm
Ley 5594, passed on Sep 9, 2022, enacted on Sep 21, 2022 (Decreto 1130/2022), Boletín Oficial 6122 of Sep 29, 2022. Implemented by Decreto 563/2025 (Jul 7, 2025) verif. verif Sep 29, 2022 ↗

Our reading

This is the regulatory key to the entire Rio Negro thesis: a 2022 provincial law - predating RIGI - that turned a closed coast into Vaca Muerta's only Atlantic outlet. The residual risk is judicial and environmental: the Superior Court rejected on form (not on the merits), and a reversal in a future instance would touch the whole corridor. It is THE provincial watchlist item. thesis

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Where it lands, province by province1

Río Negro Enabling condition for the corridor's ~USD 11,200 M (VMOS + LNG + pipeline): without Ley 5594 there is no terminal, no FLNG, and no Rio Negro toll on Vaca Muerta exports. favorable thesis

Which markets depend on this rule1

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Ignacio Aredez
Analysis and curation: Ignacio Aredez
Head of Despegue
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  • Machine Learning (Google Cloud)
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