What Deep-Sea Mining Exploration Permits Actually Allow Companies to Do

Deep-sea mining has generated years of heated public debate over whether it should happen at all, but a more basic question tends to get skipped in that debate: what does an actual exploration permit legally allow a company to do right now, today, before any commercial mining has been approved anywhere in international waters? The answer is more limited, and more heavily regulated, than most coverage implies, and understanding the actual permit structure clarifies a lot about where this industry genuinely stands. I’ve spent a decade designing subsea infrastructure as a marine and offshore engineer, and the regulatory reality here is considerably more cautious than the “companies are about to start mining the ocean floor” framing that circulates in a lot of public discussion.

Who Actually Issues These Permits

For deep-sea mining activity in international waters — meaning anywhere outside individual countries’ exclusive economic zones, which extend 200 nautical miles from a nation’s coastline and fall under that nation’s own resource jurisdiction — the relevant regulatory authority is the International Seabed Authority (ISA), a body established under the United Nations Convention on the Law of the Sea specifically to regulate mineral-related activities on the seafloor in international waters, sometimes referred to as “the Area” in the treaty’s own terminology, on behalf of humanity as a whole rather than any individual nation.

The ISA has issued a number of exploration contracts since the early 2000s, mostly for polymetallic nodule fields in the Clarion-Clipperton Zone of the central Pacific, along with exploration contracts covering polymetallic sulphides and cobalt-rich crusts in other seafloor regions, and these contracts are typically sponsored by a specific ISA member state that takes on legal responsibility for the sponsored contractor’s compliance with ISA regulations, a requirement built into the treaty framework specifically to ensure some sovereign state remains accountable for a contractor’s activity even though the actual seabed area itself isn’t under any single nation’s jurisdiction.

What Exploration Contracts Legally Permit

An ISA exploration contract grants the contractor exclusive rights to survey and explore a specific, defined seabed area for mineral resources, but critically does not authorize commercial extraction — exploration contracts permit activities like seafloor mapping, environmental baseline data collection, test mining of limited scope specifically for resource assessment and environmental impact study purposes, and small-scale sampling of nodules or other mineral deposits, but not the large-scale commercial harvesting operation that “deep-sea mining” evokes in most public imagination.

This exploration-versus-exploitation distinction is the single most important structural fact about where this industry actually stands: commercial exploitation contracts, which would authorize full-scale mineral extraction and sale, require a separate, more extensive regulatory framework that the ISA has been actively negotiating for years but had not finalized as of the most recent negotiating sessions, meaning no company currently holds, or can currently legally obtain, authorization for full commercial deep-sea mining in international waters — every current ISA contract is explicitly an exploration-stage permit, regardless of how far along a company’s technology development or seafloor survey work has progressed.

Why the Regulatory Timeline Has Taken This Long

The ISA’s exploitation regulations, often referred to as the “Mining Code,” have been in active development and negotiation for well over a decade, addressing genuinely complex questions around environmental protection standards, royalty and revenue-sharing arrangements for exploitation activity conducted on behalf of humanity as a whole, and specific operational and monitoring requirements that any commercial exploitation contractor would need to meet. This negotiation has proceeded slowly in part because it involves balancing the interests of ISA member states with active exploration contracts and mining industry ambitions against a substantial and vocal group of countries, environmental organizations, and scientific bodies pushing for a moratorium or significantly more precautionary approach given how poorly understood deep-sea ecosystems and the environmental impact of large-scale seafloor disturbance actually are.

Nauru’s 2021 invocation of a specific treaty provision that effectively started a two-year countdown clock pressuring the ISA to finalize exploitation regulations added real urgency to this negotiation, but the underlying scientific and diplomatic disagreements haven’t resolved simply because a deadline was invoked, and negotiations have continued past that original deadline without full agreement on final exploitation regulations, illustrating just how substantively unresolved the underlying environmental and governance questions remain even as pressure to finalize a framework has intensified.

What Companies Have Actually Been Doing Under Current Permits

Companies holding ISA exploration contracts, including The Metals Company (formerly DeepGreen), which holds some of the more prominent Clarion-Clipperton Zone exploration contracts sponsored by Nauru, Tonga, and Kiribati, have spent years conducting exactly the kind of activity exploration contracts actually permit: seafloor mapping and surveying, environmental baseline studies documenting existing seafloor ecosystems before any potential future extraction activity, and limited-scale collector vehicle testing to validate the mechanical systems that would eventually be used for actual nodule collection if and when exploitation permits become available.

These test collection runs, while sometimes covered in press as evidence that commercial mining is already underway, are explicitly framed within the companies’ own regulatory filings and public statements as environmental and technical validation activity conducted under exploration-stage authority, not commercial-scale extraction, an important distinction that’s gotten somewhat blurred in public discourse but that carries real legal and regulatory weight in terms of what’s actually currently authorized to occur under existing ISA contracts.

The National Waters Exception That Complicates This Picture

The ISA’s jurisdiction covers only international waters, meaning individual coastal nations retain full sovereign authority to permit deep-sea mining exploration and exploitation within their own exclusive economic zones without needing ISA approval at all, a genuinely different and less internationally scrutinized regulatory pathway. The Cook Islands has moved further along this pathway than most nations, issuing its own domestic exploration licenses for polymetallic nodule fields within its exclusive economic zone, operating under Cook Islands national regulation rather than the ISA framework, and Norway has separately explored opening portions of its extended continental shelf to seabed mineral exploration under its own domestic permitting process as well.

This national-waters pathway means the overall global deep-sea mining regulatory picture is genuinely more fragmented than a single international framework would suggest — progress and permitting standards vary meaningfully depending on whether a given seafloor area falls under the ISA’s international waters jurisdiction or an individual nation’s own exclusive economic zone authority, and it’s entirely possible for exploitation-stage mining to begin within a national economic zone under domestic permitting before the ISA finalizes its own international waters exploitation framework, since these are legally separate and independently proceeding regulatory tracks.

Where This Actually Stands

The honest summary is that deep-sea mining exploration permits currently authorize survey, mapping, environmental baseline study, and limited technology validation activity, but not commercial-scale mineral extraction in international waters, and that gap between exploration authority and exploitation authority is a genuine, currently unresolved regulatory boundary rather than a formality companies are simply waiting out. Whether and when that gap closes depends on negotiations that have already run considerably longer than initially anticipated, addressing environmental and governance questions that remain substantively contested rather than nearly settled — a regulatory reality considerably more cautious and unresolved than either optimistic industry framing or alarmist “mining has already started” framing typically conveys.