Critical Minerals and Regulatory Shifts in North America: Mexico

For decades, the security of critical mineral supply has been a background concern in global economic policy. The energy transition, the rise of artificial intelligence, and repeated shocks to global supply chains, wars, pandemics, export controls, have pushed it to the center of the agenda.

The United States, whose technological ambitions depend on reliable access to these materials, has made securing critical minerals a strategic priority. Mexico, its resource-rich southern neighbor, sits at the heart of that effort, but this comes at a moment when Mexico's regulatory framework for critical minerals remains far from consolidated in ways that meet US needs. The result is a genuine tension: can Washington's market-driven strategy coexist with Mexico's current legislation? And can Mexico convert its geographic and geological advantages into real investment, or will legal uncertainty hold it back?

What Are Critical Minerals?

Definitions vary by jurisdiction, but critical minerals are generally understood as non-fuel resources essential to a country's economic and national security, whose supply chains are vulnerable to disruption. Lithium, cobalt, nickel, rare earth elements, and copper are the usual headline cases.

These materials share a common role: they are the physical inputs of the modern economy. They go into electric vehicle batteries, solar panels, and wind turbines. They are equally essential to semiconductors and the data centers powering artificial intelligence and defense systems. Whoever controls their supply has real leverage over the technologies built on top of them.

Mexico’s Regulatory Shift

As global resource-extraction priorities shift, Mexico has responded by placing lithium exploration, extraction, and processing exclusively under state control. 

To fully grasp the nation’s stance on critical minerals, we must look into the core legislative shifts that redefined the sector. A critical turning point occurred with the 2022 reform to the Mining Law, which modified Article 10 to establish that the exploration, exploitation, and benefit of lithium and other minerals declared “strategic” by the Mexican state are exclusive utilities of itself. Building upon this legislative baseline, in October of 2024, the Mexican Constitution was modified to explicitly reserve the exploration, extraction, and processing of lithium exclusively for the state. By formally amending Article 27 of the Constitution, the government elevated the restrictions previously introduced in secondary legislation to a supreme constitutional level. This amendment prohibited the granting of any concessions, licenses, or contracts to private parties for lithium operations, effectively categorizing the resource not merely as a valuable commodity, but as an indispensable pillar of national security.

To administer this framework, the government created Litio para México (LitioMx), a decentralized public entity responsible for managing the mineral's entire economic value chain. This structure keeps the wealth generated by lithium extraction under state control, and establishes a clear boundary for international investors operating in the North American market.

It's worth being precise about scope. The constitutional reform applies specifically to lithium. The rest of the sector continues to operate under Mexico's existing mining concession framework.

The US Strategy: Alliances Over Ownership 

Washington has taken a different path, not state ownership, but coordination among trusted partners, backed by financing incentives.

That approach was on display at the 2026 Critical Minerals Ministerial, convened by the State Department Undersecretary Marco Rubio, which brought together representatives from fifty-five countries, including Mexico. The summit launched the Forum on Resource Geostrategic Engagement (FORGE), successor to the Minerals Security Partnership, to be chaired by South Korea through June 2026. Eleven memoranda of understanding were signed at the summit, though Mexico was not among the signatories. New US financing for strategic mineral projects, coordinated through the Pax Silica initiative, was also announced.

Mexico's absence from those memoranda understates its actual position. Days after the Ministerial, US Trade Representative Jamieson Greer announced a bilateral US-Mexico Action Plan on Critical Minerals, jointly led by USTR and Mexico's Ministry of Economy, one of only three such action plans to emerge from the Ministerial, alongside those with Japan and the European Commission. That short list says more about Mexico's strategic weight to Washington than the absence of a signature does.

Inside the Action Plan

Signed on Feb. 4, 2026, with a 60-day implementation window ending April 5, the plan committed both governments to:

- Identify priority mineral projects for joint development, with copper, silver, lithium, graphite, and zinc named as an initial focus
- Explore border-adjusted price floors on critical mineral imports as a trade-policy tool
- Share geological data between the US Geological Survey and its Mexican counterpart
- Consult on folding these mechanisms into a broader, binding plurilateral agreement
- Coordinate stockpiling, rapid-response protocols, and joint R&D on mineral technologies

Two caveats matter here. First, the plan is not legally binding, it is a policy framework, not a treaty. Second, as of this writing there is no public reporting on concrete implementation steps beyond the initial announcement. Its significance is diplomatic and directional for now, not yet operational.

Final Remarks

Mexico's position presents both opportunities and challenges. The nationalization of lithium has narrowed the scope for private investment in that specific segment and introduced an additional policy consideration for investors evaluating mining projects in the country. At the same time, Mexico's strategic location, significant mineral potential, and deep integration into North American supply chains continue to make it an important partner in the US critical minerals strategy, as reflected by its inclusion among the three countries covered by a dedicated bilateral action plan.

Whether Mexico converts that leverage into investment depends less on rhetoric than on two concrete developments to watch: whether the Action Plan is converted into a binding treaty, and whether Mexico's regulatory framework can be reconciled with USMCA obligations during the ongoing joint review. Both processes are already underway, and the fact that Mexico secured one of only three bilateral action plans from the 2026 Ministerial suggests Washington sees a viable path forward. For investors evaluating projects outside lithium, the current framework marks a meaningful first step, the direction is set; what remains is turning it into binding legal certainty.