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The Action Plan is structured as a 60-day work programme rather than a binding instrument. Per the USTR readout and press release, the two governments commit to:
1. Priority-mineral scoping. Jointly identify a defined subset of critical minerals on which the bilateral track will focus first (the public release does not name the minerals; the priority list is to be agreed inside the 60-day window). 2. Border-adjusted price floors. Explore "border-adjusted price floors for critical-minerals imports" as a candidate trade-policy instrument. Greer's separate 26 February public- comment notice frames price floors and tariffs as the two border-mechanism families under active study for a future plurilateral agreement. 3. Coordinated stockpiling, regulation, and rapid response. The Plan envisions coordination on strategic stockpiles, common mining/processing/trade regulation, geological mapping, and a rapid-response mechanism for supply-chain disruptions. 4. Plurilateral on-ramp. Both sides commit to consulting on how the resulting bilateral architecture could be folded into a binding plurilateral Agreement on Trade in Critical Minerals — the same plurilateral framework USTR is simultaneously developing with the EU and Japan (announcements 2026-02-04 / 2026-02-26).
The instrument creates no immediate tariff, quota, or subsidy flow. It is a process commitment: a 60-day timetable to generate the technical and political inputs that would feed into either a bilateral implementing agreement or the plurilateral framework.
Plan does not change any rate, quota, licensing requirement, or subsidy parameter on its own. Severity 4-5 is reserved for measures whose entry into force directly moves trade flows.
concept — a border-adjusted minimum import price — is qualitatively different from the tariff, quota, and domestic-content tools that dominate the post-2024 US trade reset. If operationalised, it would be the first major supply-side floor instrument in the modern trade system and would reshape global mineral price formation. That option value justifies severity above the baseline 1-2 reserved for pure declaratory diplomacy.
statutory Joint Review is the single largest North-American trade event of the cycle. The Action Plan is positioned by Greer as a confidence-building measure ahead of that review; its trajectory is therefore a leading indicator for the bilateral US-Mexico track within USMCA.
IPTM (2025-01-21-mexico-plan-mexico-nearshoring-decree, 2025-12-29-mexico-decreto-ligie-1463-tariff-lines, 2026-04-23-mexico-decreto-tigie-prosec-185-tariff-lines) cover the Mexican-side industrial and tariff instruments. This Action Plan is the bilateral US-Mexico minerals diplomacy layer that those filings did not capture.
(lithium, copper, REEs, nickel) are likely focal points given the existing US Section 232 critical-minerals proclamation (filed 2026-01-14-us-section-232-critical- minerals-proclamation) and the FORGE umbrella (filed 2026-02-04-us-state-forge-critical-minerals-launch). Mexican copper and lithium projects (Sonora lithium; Buenavista del Cobre) gain bilateral-framework optionality.
2025-10-27-us-japan-critical-minerals-framework and 2026-04-24-eu-us-critical-minerals-strategic-partnership as the three bilateral spokes feeding a candidate plurilateral hub.
workstream produces a usable price-floor mechanism, that instrument could propagate to the EU and Japan tracks. Watch for substantive output in early Q2 2026.
engagement on critical minerals is a positive readthrough for the broader US-Mexico USMCA posture; deterioration on this track would be an early warning signal for the Joint Review.
nickel, and REEs are the most likely candidates given the Mexican geology and the existing US instruments, but the formal scoping is internal to the 60-day window.
via a tariff snap-back, a quota, a procurement guarantee, or a hybrid mechanism is unsettled — the 26 February USTR notice solicits public comment precisely on this question.
posture toward US-led critical-minerals architecture has been cautiously cooperative; the durability of that posture through the USMCA Joint Review is the key political variable.
folded into a binding plurilateral Agreement on Trade in Critical Minerals (with EU and Japan) or remains a standalone US-Mexico instrument depends on the parallel tracks' pace.
Primary URLs verified via web search 2026-05-06: the canonical USTR press release, the USTR-hosted Action Plan PDF, the USTR public-comment notice (26 Feb 2026), and the State Department 2026 Critical Minerals Ministerial readout are all live. The PDF text is binary and not extracted in this filing — a future wake should fetch the raw text via pdftotext to capture any operational detail (priority-mineral list, working-group governance, deliverable cadence) not already in the press release.