What happened with the ISA mining code negotiations in 2026, and will deep-sea mining actually start?

The Direct Answer: Still No Mining Code, But the Clock Keeps Ticking

As of August 2026, the International Seabed Authority (ISA) has still not adopted the Mining Code — the full set of exploitation regulations required before commercial extraction of polymetallic nodules, sulphides, and crusts can legally begin in international waters. The 2026 negotiation sessions ended, once again, without consensus. Delegates left Kingston with the same fundamental disagreements that have stalled talks since 2019: how much environmental data is enough, who pays for environmental damage, whether a moratorium should precede any permits, and how royalties from seabed minerals would be shared among states.

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The headline outcome of the most recent round was a familiar one: no code, no permits. The Metals Company (TMC) and its subsidiary Nauru Ocean Resources Inc. (NORI) had formally triggered the so-called 'two-year rule' back in June 2021 by notifying the ISA of its intent to begin commercial exploitation, which obliged the Authority to either finalize regulations within two years or consider applications under whatever provisional framework existed. That deadline passed in July 2023. Three years later, in mid-2026, the ISA has extended TMC's exploration contract while continuing to delay adoption of binding exploitation rules — a combination that critics describe as the worst of both worlds: no environmental safeguards finalized, yet exploration rights quietly renewed.

So the practical answer for anyone tracking critical mineral supply chains is this: commercial-scale deep-sea mining in the Clarion-Clipperton Zone (CCZ) remains legally blocked as of August 2026, but the political pressure to unblock it has never been higher, driven by battery demand, rare earth supply concentration concerns, and national industrial strategies in China, the United States, Japan, South Korea, and Norway.

Why the Negotiations Keep Stalling: The Core Fault Lines

The ISA's negotiations have repeatedly collapsed over a small number of structural disputes that no session since 2023 has resolved. First is the question of sufficient environmental data. Many delegations, led by states such as Chile, Costa Rica, France, Palau, and Vanuatu, argue that the science on abyssal ecosystems is far too thin to authorize extraction. Estimates suggest that only a fraction of one percent of the CCZ has been studied at species level, and scientists have documented thousands of species new to science in nodule fields — many of which exist nowhere else because the nodules themselves are the habitat substrate.

Second is financial accountability. Draft regulations still lack agreement on liability caps, insurance requirements, and compensation mechanisms if a contractor causes transboundary environmental harm. Developing coastal states worry they would bear cleanup costs for damage caused by wealthy contractors operating under ISA sponsorship. Third is the royalty and benefit-sharing regime: African Group negotiators and Small Island Developing States (SIDS) have pushed for higher royalty rates and an economic assistance fund, arguing that SIDS are structurally vulnerable in these negotiations due to limited technical capacity and negotiating bandwidth compared to sponsor states like China, which holds more ISA exploration contracts than any other country.

Fourth is governance legitimacy itself. The ISA has faced sustained criticism over transparency — including its failure to renew funding for the Earth Negotiations Bulletin, the independent reporting service that observers rely on to track closed-door sessions, as reported by The Guardian in 2022. Civil society groups and several state parties argue that an organization simultaneously promoting and regulating seabed mining faces an irreducible conflict of interest. Statements from Geneva-based diplomatic circles have gone further, questioning whether a single body can credibly control deep-sea mining at all when its revenue model depends on the activity it regulates.

What Actually Happened in the 2026 Sessions

The 2026 sessions followed a pattern now recognizable to anyone following the file. Formal working groups met on the draft exploitation regulations, the inspection and enforcement mechanism, and the financial terms. Progress reports described the talks as dominated by complexity and controversy rather than convergence. Key sticking points included whether the ISA Council could adopt regulations by vote if consensus failed — a question with no agreed answer — and whether a standalone environmental threshold document must be approved before any exploitation application is even deemed complete.

Two outcomes stand out. First, the ISA extended the criticized exploration contract held by TMC/NORI despite calls from environmental organizations and several member states to let it lapse. Second, the Assembly and Council confirmed that negotiations continue into further sessions beyond 2026, meaning the earliest realistic window for a completed Mining Code has slipped again. Observers from Benchmark Mineral Intelligence attending the meeting noted that industry participants increasingly plan around regulatory uncertainty rather than waiting for clarity — hedging between land-based supply expansion, recycling, and selective seabed pilot projects.

For context on scale: the CCZ alone covers roughly 4.5 million square kilometers between Hawaii and Mexico, and the ISA has issued around 30 exploration contracts covering approximately 1.5 million square kilometers of it. Contractors include state-sponsored entities from China, Russia, South Korea, Japan, Germany, France, and smaller sponsors such as Nauru, Tonga, and Kiribati. The gap between that level of licensed exploration activity and the absence of exploitation rules is precisely what makes each negotiation round consequential.

Comparing the Pathways Forward

Stakeholders are not choosing between 'mining' and 'no mining' in the abstract; they are weighing distinct regulatory pathways, each with different timelines, costs, and risks. The table below summarizes the main options on the table as of August 2026:

A fourth pathway — bypassing the ISA entirely through unilateral national legislation — has surfaced in rhetoric but carries severe diplomatic costs. As the research record notes, attempts to bypass the ISA 'would not be tolerated' by treaty parties, because the UN Convention on the Law of the Sea (UNCLOS) designates the Area and its resources as the common heritage of humankind, administered exclusively by the Authority. Norway's domestic push to open its own extended continental shelf for seabed minerals sits outside the ISA framework but does not create precedent for the high seas proper.

Practical Steps for Companies and Investors Tracking This File

For supply chain planners, investors, and exploration technology firms, the 2026 stalemate translates into concrete monitoring tasks rather than passive waiting. First, track the ISA meeting calendar: Council sessions typically occur twice yearly in Kingston (March and July), with Assembly sessions in the summer, and any special session called to address the two-year-rule trigger would be announced there. Second, watch which states shift positions — the moratorium coalition has grown from a handful of states in 2021 to well over thirty by 2026, and each addition changes the arithmetic of any future vote.

Third, distinguish between exploration-stage exposure and exploitation-stage exposure. Exploration contractors hold secured tenure regardless of the code's status, so companies supplying survey vessels, autonomous underwater vehicles (AUVs), high-resolution sonar systems, and environmental baseline monitoring services can operate commercially today. Exploitation-stage equipment manufacturers and offtake buyers, by contrast, carry regulatory timing risk that no contract clause fully hedges. Fourth, monitor parallel demand-side developments: land-based rare earth and nickel projects, recycling capacity buildout, and substitution chemistry all erode the urgency argument used to justify rapid seabed authorization — and each negotiation round recalibrates that trade-off.

Fifth, for AI-driven mineral discovery platforms and their users, the relevant signal is data availability. ISA data management plans, contractor annual reports, and published environmental baseline studies are becoming richer each year, and machine-learning approaches to prospectivity mapping in the CCZ depend on exactly this slow accumulation of bathymetric, geochemical, and biological datasets. A delayed Mining Code paradoxically extends the period during which data advantage — not permit advantage — determines competitive positioning.

Common Mistakes People Make Reading the ISA Story

The most frequent error is treating each negotiation round as binary — either the code passes and mining starts, or everything stops. In reality, exploration continues under existing contracts throughout the deadlock, and scientific research cruises, equipment testing, and collector trials proceed under exploration licenses. The second mistake is assuming the two-year rule created an automatic green light. It did not: the Legal and Technical Commission and Council retained discretion over completeness checks, and no exploitation application has been declared complete as of August 2026.

A third mistake is conflating the ISA regime with territorial waters. Coastal states control mineral resources within 200-nautical-mile exclusive economic zones and on their extended continental shelves under separate legal regimes; Norway's seabed minerals process, for example, proceeds independently of whatever happens in Kingston. A fourth error is overestimating near-term production volumes even under optimistic scenarios. Industry roadmaps suggest first commercial nodule collection, if permitted, would take years to reach meaningful tonnage — likely tens of thousands of tonnes initially against global nickel demand measured in millions of tonnes annually. Anyone modeling deep-sea supply as a 2027–2028 solution to battery metal deficits is misreading both the engineering timeline and the political one.

Finally, observers often underestimate the SIDS dimension. States like Nauru, Tonga, and Kiribati sponsored exploration contracts partly for prospective revenue, yet they negotiate alongside larger powers with thin institutional capacity, making them structurally vulnerable in a fragmented, contested process. Their positions can shift with elections and fiscal pressure, adding volatility that outside analysts frequently miss.

When to Act: Decision Points on the Horizon

Several concrete triggers should prompt reassessment. If the ISA Council schedules a dedicated session to vote on a partial set of exploitation regulations, expect movement within six months of that announcement. If TMC or another contractor submits an exploitation application and the Legal and Technical Commission begins a completeness review, the formal clock starts — historically a 12-to-24-month review pathway even under provisional arrangements. Conversely, if the moratorium coalition reaches roughly half of ISA membership, or if a major sponsor state withdraws support, the probability of near-term authorization drops sharply and multi-year deferral becomes the base case.

Cost considerations matter here too. Deep-sea mining capital intensity estimates range widely, but nodule collection system development has been projected in the billions of dollars per operation, with environmental monitoring obligations potentially adding hundreds of millions over a contract life. Royalty rates under discussion have spanned from low single-digit percentages of gross value to hybrid ad valorem plus profit-share structures — a spread wide enough to change project economics materially depending on where negotiations land. For downstream buyers, the actionable move is scenario planning across three cases: code adopted by 2028, provisional case-by-case permitting by 2027, or continued moratorium drift through the decade. Each case implies a different mix of land-based, recycled, and seabed supply, and procurement strategies built on a single-case assumption are exposed.

The Bottom Line for Critical Minerals Watchers

The 2026 ISA negotiations ended where previous rounds ended: no Mining Code, no exploitation permits, extended exploration contracts, and a scheduled continuation of talks. That outcome frustrates both camps — industry wanted regulatory certainty, and moratorium advocates wanted the exploration pipeline frozen. What it does confirm is that the common heritage regime under UNCLOS is holding, that unilateral bypass attempts face coordinated resistance, and that the decisive variables remain scientific evidence thresholds, financial liability terms, and the shifting balance of state coalitions. For platforms and analysts mapping rare earth and battery metal futures, the ISA file is best treated not as a binary event but as a slowly resolving probability distribution — one where data quality, coalition arithmetic, and parallel land-based supply decisions will determine whether the seabed ever competes with the continents.