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The Consejo de Minería is Peru's highest administrative-tribunal instance for mining disputes and licence decisions. Its resolutions are binding on the General Directorate of Mining (DGM) and on concession holders, subject only to judicial review via contencioso-administrativo proceedings. Resolution 236-2026-MINEM/CM exercised this appellate jurisdiction to void the October 2025 DGM exploitation authorisation on two procedural-substantive grounds:
1. Inadequate legal motivation: the DGM resolution did not provide sufficient reasoning demonstrating compliance with the Regulation of Mining Procedures (DS 020-2023-EM) and the General Administrative Procedures Act (TUO Ley 27444). 2. Unresolved technical observations: two outstanding observations — relating to waste-dump (relave) infrastructure siting/design and the construction-timeline sequencing of key project components — were not satisfactorily addressed in the DGM's record.
The Consejo de Minería's ruling explicitly frames the nullification as a procedural step requiring DGM to re-evaluate the file, not a substantive rejection of the project. This framing is consistent with executive-branch communications that emphasised the project remains viable pending revised documentation.
Tía María is a $1.8 billion open-pit copper mine operated by SPCC (Southern Peru Copper Corporation), targeting ~120,000 t/yr copper output over a projected 20-year mine life from the La Tapada and La Tapada deposits in Islay, Arequipa. The project has a multi-decade regulatory history characterised by community-opposition cycles, environmental-assessment revisions, and repeated permit-process interruptions. The October 2025 DGM authorisation was the first exploitation licence granted after a 2019 social-conflict moratorium.
Following the March 2026 nullification, MINEM conducted a revised technical assessment and re-authorised the project's first-stage La Tapada open-pit operations in approximately April 2026. A formal amendment entry will be added to this record once the MINEM resolution number and official publication URL for the re-authorisation are confirmed.
Peru 2026 register gap closure: The 2026 cohort had zero Peru entries prior to this filing, despite Peru being the world's #2 copper producer. This action anchors the 2026 Peruvian mining-regulatory-volatility record.
First Consejo de Minería nullification on the register: The instrument type — an administrative-tribunal null-and-void resolution issued by the highest mining-appellate body — is distinct from filed legislative (DS-020-2024-EM border-zone FDI) and bilateral (US-Peru critical-minerals MOU) Peru instruments. It establishes a procedural-reversal precedent within the Peruvian mining-licence regulatory architecture that is formally separate from political or social-conflict channels.
LatAm copper regulatory-volatility precedent: Structurally analogous to the Panama Supreme Court's November 2023 unconstitutionality ruling against the Cobre Panamá mining law (2023-11-27-panama-corte-suprema-sentencia-inconstitucional-ley-406-cobre-panama), the Tía María March-to-April 2026 reversal illustrates the pattern of administrative/judicial intervention reshaping copper supply-chain investment in Andean-Pacific EM states. The rapid progression from nullification (19 March) to re-authorisation (~20 April) also demonstrates the Peruvian executive branch's capacity to resolve procedural deficiencies within weeks when politically motivated.
2026 election-cycle context: The Boluarte administration's handling of the Tía María decision sequence — nullification followed by swift re-authorisation — falls within the 2026 Peruvian general election cycle and reflects the tension between fiscal/royalty-revenue imperatives and the political management of Arequipa regional opposition.
Southern Copper / Grupo México exposure: The $1.8bn project and 120 kt/yr Cu supply materialising on schedule into a tight copper-supply environment (post-2026 mine-supply plateau) is material for Grupo México's group-level capex allocation and for SCCO's forward production guidance.
Peruvian Mining Council procedural rulings carry contained investment-delay risk when the underlying project has executive-branch support.
copper-regulatory-reversal cluster most relevant for COPX/PICK ETF positioning.
MOU provides the bilateral copper-cooperation frame within which this project's operational timeline matters most to US supply-chain planners.
re-authorisation (pending — file amendment entry when confirmed).
phase (2026–2027) — historical pattern of social-conflict interruptions at this site.
for Tía María under an incoming administration.