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On 8–9 April 2026 the Argentine Cámara de Diputados gave final passage (137–111 with 3 abstentions) to a bill amending Ley 26.639 (the 2010 Régimen de Presupuestos Mínimos para la Preservación de los Glaciares y del Ambiente Periglacial), after the Senate had already approved the reform in February 2026 (40–31 with 1 abstention). The Executive promulgated the law as Ley 27.804 via Decreto 271/2026, published in the Boletín Oficial on 24 April 2026. The reform narrows the federal protection floor by limiting strict protection to glaciers and periglacial geoforms with proven hydrological function, and transfers to provincial governments the authority to define the technical and scientific criteria delimiting protected areas — directly unblocking the "ABCD" copper pipeline (Agua Rica/MARA, Filo del Sol, Josemaría, Los Azules, El Pachón) and adjacent lithium and gold projects whose prior periglacial-buffer encumbrance had stalled an estimated USD 30bn of investment, ~70% in copper / gold / silver.

On 6 August 2025, President Javier Milei signed Decreto 563/2025 (countersigned by Chief of Cabinet Guillermo Francos and Economy Minister Luis Caputo). Published in the Boletín Oficial on 7 August 2025 and effective the following day, the decree sets the Derecho de Exportación (DEX) rate to 0% on 231 mining-sector NCM tariff positions covering construction minerals, non-metallic minerals, metallic mining goods (including copper concentrates and iron ore), and certain mineral fuels and precious/semi-precious stones — eliminating the 4.5% baseline rate previously in force on these categories. The decree expressly repeals Decreto 308/2022, which had created an Optional Copper Export Registry that never became operational. Mining is Argentina's fifth-largest export complex and accounts for roughly 80% of provincial exports in Jujuy, San Juan, Santa Cruz, and Catamarca; the measure complements RIGI (Law 27.742) by adding a sector-wide tariff floor underneath RIGI's project-level fiscal stability.

On 11 April 2025 President Javier Milei signed Decreto de Necesidad y Urgencia 269/2025, published in the Boletín Oficial on 14 April 2025 (edición Nº 35.647). The decree repealed Decreto 28/2023, formally lifting the cepo cambiario — the foreign-exchange restrictions that had been in continuous operation in some form since November 2011. Operative provisions include elimination of the 80/20 export-proceeds-channelling mandate, removal of individual USD purchase and wire-transfer caps, permission for companies to repatriate post-1-January-2025 dividend profits, and replacement of the daily crawling-peg with a band float within a $1,000–$1,400 ARS/USD corridor with BCRA floor/ceiling intervention rules. The measure was coordinated with the IMF Extended Fund Facility (USD 20bn total; USD 15bn 2025 free-availability tranche) approved 11 April 2025, and operationalises the currency-stability guarantee embedded in the RIGI large- investment regime (Law 27.742, July 2024).

Decree 38/2025 reduces Argentina's agricultural export duties (retenciones) across all major grains and oilseeds effective January 27, 2025, through June 30, 2025. Soybean duties fall from 33% to 26%, soy products from 31% to 24.5%, wheat/maize/barley/sorghum from 12% to 9.5%, and sunflower seed from 7% to 5.5%; regional-economy commodities including sugar, cotton, and rice receive a permanent zero-duty rate. The measures are designed to accelerate foreign exchange liquidation by improving exporter margins under the Milei administration's macroeconomic stabilisation program, and represent the most market-significant single Argentine agricultural trade action of 2025-Q1.

On 27 June 2024 the Argentine Congress passed Law 27.742, the "Ley de Bases y Puntos de Partida para la Libertad de los Argentinos" ("Ley Bases"), the flagship economic reform of the Milei administration. The law was published in the Boletín Oficial on 8 July 2024 and Title VII established the Régimen de Incentivo para Grandes Inversiones (RIGI) — a promotional regime designed to attract large-scale capex into mining, energy, oil & gas, LNG, steel, forestry, tourism, infrastructure, and technology. Implementing Decree 749/2024 was issued on 23 August 2024 and the regime became fully operational with Resolution 1074/2024 on 22 October 2024. RIGI offers single-project vehicles ("VPUs") that commit at least USD 200M (with sector-specific thresholds rising to USD 600M and up to USD 2B for long-term "strategic export" projects) a 30-year regulatory, tax, customs and foreign-exchange stability guarantee. Headline benefits include a reduced 25% corporate income tax (vs. 35% standard), accelerated depreciation, full deductibility of inflation adjustments, an import-duty exemption on capital goods and inputs, a phased relaxation of central-bank obligations to repatriate and convert export proceeds (20% free after year one, 40% after year two, 100% after year three), and reduced dividend withholding tax. Disputes are subject to international arbitration under ICSID or UNCITRAL rules. As of mid-2025, RIGI's project pipeline reached USD 33.9B in submitted applications, of which roughly USD 15.7B (46.5%) had been approved across nine projects spanning steel (Sidersa), energy/LNG (PAE Southern Energy, YPF Argentina LNG), three mining projects, and infrastructure. The flagship approval was Rio Tinto's USD 2.5B Rincón battery-grade lithium carbonate plant in Salta (initial 53,000 t/yr, scaling to 60,000 t/yr by 2028) — the first mining project approved under the regime, on 21 May 2025. Strategically, RIGI is Argentina's bid to compete with Chile's lithium framework and Brazil's industrial policies for upstream-critical-minerals capex. Combined with the lifting of Argentina's FX controls (cepo cambiario) in April 2025 it sharply re-rates the country's project-economics math for multinationals — particularly in the Lithium Triangle, the Vaca Muerta shale, and pipeline/LNG infrastructure. Whether the 30-year stability guarantee survives a future change of government is the dominant political-risk overhang on the regime.

Signed by President Javier Milei and the entire cabinet on 20 December 2023 and published in the Boletín Oficial extraordinario on 21 December 2023, Decreto de Necesidad y Urgencia 70/2023 declares a public emergency across economic, financial, fiscal, administrative, pension, tariff, sanitary, and social matters until 31 December 2025 (Article 1) and enacts 366 articles across 16 titles that fundamentally restructure Argentina's regulatory framework. The DNU repeals or amends dozens of statutes to deregulate foreign trade (repealing the Compre Nacional buy-preference law Ley 18.875 and the price-control framework Ley 27.345), opens privatisation of state enterprises (Aerolíneas Argentinas, ENARSA, Banco Nación, Correo Argentino, Trenes Argentinos), dismantles the Ley de Abastecimiento price-control regime, liberalises civil aviation cabotage to foreign carriers, deregulates hydrocarbons export and mining permitting, and replaces the severance-pay regime with a capitalisation-fund system. It is the foundational enabling framework for all subsequent Milei-administration deregulatory instruments filed on the IPTM register, including RIGI (Law 27.742), Decreto 38/2025, Decreto 449/2025, and Decreto 563/2025.