The common heritage of mankind in international law is a doctrine holding that certain areas beyond any nation’s borders belong collectively to all people, cannot be claimed or colonized by any state, and must be managed internationally with the benefits shared. Its clearest working application is the deep seabed, where the International Seabed Authority (ISA) licenses mineral exploration under the United Nations Convention on the Law of the Sea (UNCLOS).1United Nations. United Nations Convention on the Law of the Sea – Part XI The doctrine is also written into the 1979 Moon Treaty, but its authority over outer space is contested, and it does not govern Antarctica at all.
What the Doctrine Actually Requires
Four rules do the work. Together they distinguish a common heritage zone from a traditional territory, from the high seas, and from an unclaimed frontier.
No national appropriation. No country can claim sovereignty over any part of a common heritage area, and no government, company, or individual can treat these zones as property. Any attempt to do so is legally void.1United Nations. United Nations Convention on the Law of the Sea – Part XI Flags planted on the ocean floor and declarations by national legislatures carry no weight.
Peaceful use only. UNCLOS Article 141 opens these areas to all countries, coastal or landlocked, but only for peaceful activities.2United Nations. United Nations Convention on the Law of the Sea The precise scope of “peaceful purposes” remains debated, with readings ranging from merely non-aggressive to strictly non-military, but weapons testing and military bases are off the table.
Benefits for all of humanity. UNCLOS Article 140 requires that activities in these zones be carried out for mankind as a whole, with particular consideration for the interests and needs of developing countries.2United Nations. United Nations Convention on the Law of the Sea The ISA is legally obligated to create mechanisms for equitable sharing of financial benefits on a non-discriminatory basis.
International management. No single nation administers these resources. An international body acts on behalf of all countries, making decisions through representative institutions rather than through the market power of whoever arrives first.
Where the Doctrine Applies
The Deep Seabed
The primary domain governed by the doctrine is what UNCLOS calls “the Area,” meaning the seabed, ocean floor, and subsoil beyond any country’s national jurisdiction.1United Nations. United Nations Convention on the Law of the Sea – Part XI It is the largest portion of the planet governed by collective international law rather than any domestic system. It holds polymetallic nodules, cobalt-rich crusts, and polymetallic sulfides, all legally protected from private or national seizure.
Coastal countries still control resources on their own continental shelves. Where a country’s shelf extends beyond 200 nautical miles, UNCLOS Article 82 requires that country to share a portion of the revenue from exploitation through the ISA, creating a financial bridge between national jurisdiction and the common heritage zone.
The Moon and Celestial Bodies
The 1979 Agreement Governing the Activities of States on the Moon and Other Celestial Bodies, commonly called the Moon Treaty, states in Article 11 that “the moon and its natural resources are the common heritage of mankind.”3United Nations Treaty Collection. Agreement Governing the Activities of States on the Moon and Other Celestial Bodies It bars any state, organization, or person from claiming ownership of the lunar surface, subsurface, or resources in place, and envisions an international regime to govern exploitation once lunar mining becomes feasible.
The practical impact is thin. As of mid-2026, only 17 countries have ratified the treaty, and none are major spacefaring nations.4United Nations Treaty Collection. Agreement Governing the Activities of States on the Moon and Other Celestial Bodies The United States, Russia, and China have never joined.
Outer Space Generally
The 1967 Outer Space Treaty, which has far wider ratification, prohibits national appropriation of outer space and celestial bodies “by claim of sovereignty, by means of use or occupation, or by any other means.”5UNOOSA. Outer Space Treaty It does not, however, use the phrase “common heritage of mankind” and creates no international body to manage space resources. That gap between the non-appropriation rule and the absence of a management regime is where most current space-law disputes live.
Antarctica Is Not a Common Heritage Zone
Antarctica is often grouped with common heritage areas, but its legal status is different. The 1959 Antarctic Treaty does not declare the continent to be the common heritage of mankind. It freezes existing territorial claims: seven nations maintain claims, others refuse to recognize them, and the United States and Russia reserve a “basis of claim.”6Antarctic Treaty Secretariat. The Antarctic Treaty The treaty mandates peaceful use and free scientific investigation, but it preserves conflicting sovereignty positions rather than declaring collective ownership.
The 1994 Agreement That Saved the Doctrine
UNCLOS Part XI, as adopted in 1982, contained provisions industrialized nations rejected: mandatory technology transfer, production restrictions, and a governance structure they saw as tilted toward developing countries. The United States and other Western powers refused to ratify. The doctrine risked becoming a rule the countries with actual mining capacity would simply ignore.
The 1994 Agreement Relating to the Implementation of Part XI rewrote the most contentious provisions. It removed mandatory technology transfer, restructured ISA decision-making to give industrialized nations more influence, and adopted market-oriented principles for seabed mining.7Congressional Research Service. Implementing Agreements Under the United Nations Convention on the Law of the Sea Those changes brought most major nations into the framework. The United States still has not ratified UNCLOS. It treats parts of the convention as customary international law, but its non-party status limits its formal participation in ISA governance.
How the International Seabed Authority Operates
The ISA, headquartered in Kingston, Jamaica, regulates all mineral-related activities in the Area on behalf of UNCLOS member states.8International Seabed Authority. About ISA It works through several organs.
The Assembly, composed of all member states, is the supreme organ. It sets general policy, approves the budget, elects Council members, and establishes rules for equitable benefit sharing.2United Nations. United Nations Convention on the Law of the Sea
The Council is a 36-member executive body elected by the Assembly. Its seats are apportioned to balance competing interests: four for the largest consumers of deep-sea minerals, four for the biggest investors in seabed activities, four for major mineral-exporting nations (including at least two developing countries), six for developing states with special interests such as landlocked or island nations, and eighteen elected to ensure equitable geographic distribution.9United Nations. United Nations Convention on the Law of the Sea – 1994 Agreement, Annex, Section 3 The Council approves exploration and exploitation contracts and sets environmental regulations.
The Legal and Technical Commission (LTC) reviews applications on their technical and environmental merits, supervises ongoing exploration, and examines annual reports from contractors.10International Seabed Authority. The Legal and Technical Commission It also carries out functions originally assigned to a separate Economic Planning Commission that has never become operational.11International Seabed Authority. Organs of the International Seabed Authority
UNCLOS also created an entity called the Enterprise, meant to serve as the ISA’s own mining arm. Under the “parallel system,” each time a private contractor is granted an exploration area, a comparable area is reserved for the Enterprise to mine on behalf of the international community.12United Nations. United Nations Convention on the Law of the Sea – Part XI, Section 3 In practice the Enterprise has never conducted independent operations and remains dormant.13International Seabed Authority. A Study Related to Issues on the Operationalization of the Enterprise
Disputes between the ISA and contractors, or among contractors, go to the Seabed Disputes Chamber of the International Tribunal for the Law of the Sea, a standing court with compulsory jurisdiction over these commercial matters.14International Tribunal for the Law of the Sea. Chambers
How Exploration Rights Are Licensed
To date, the ISA has entered into 15-year exploration contracts with 22 contractors covering polymetallic nodules, polymetallic sulfides, and cobalt-rich ferromanganese crusts.15International Seabed Authority. Exploration Contracts
Applications may come from the Enterprise, from UNCLOS states parties, or from private or state-owned companies that hold the nationality of a member state and are sponsored by that state.12United Nations. United Nations Convention on the Law of the Sea – Part XI, Section 3 The sponsorship requirement matters. A company cannot apply on its own; a government must vouch for it and accept responsibility for compliance.
Each applicant submits a plan of work that includes an environmental impact assessment describing the current state of the marine environment and projecting how the proposed activities could affect biodiversity.16International Seabed Authority. Environmental Impact Assessments Applicants must also demonstrate financial and technical capability. The fee for a polymetallic nodule exploration application is $500,000, payable in full at submission.17International Seabed Authority. Regulations on Prospecting and Exploration for Polymetallic Nodules in the Area Fees for other mineral categories may differ. Environmental threshold values for sediment plumes, underwater noise, and light pollution are still being developed by an ISA expert group; as of 2026, final numeric limits have not been adopted.
The LTC reviews each application and recommends action to the Council, which conducts the final review.10International Seabed Authority. The Legal and Technical Commission On approval, the contractor signs a contract granting exclusive exploration rights for 15 years, with extensions of up to five years available if the contractor made good-faith efforts but could not proceed to exploitation for reasons beyond its control.17International Seabed Authority. Regulations on Prospecting and Exploration for Polymetallic Nodules in the Area Annual reports keep the LTC in the loop on compliance.
The Doctrine Reaches Into Marine Genetics
The common heritage framework was built around minerals, but the most valuable resources in the deep ocean may prove biological. Marine genetic resources from areas beyond national jurisdiction hold potential for pharmaceutical, industrial, and agricultural use, and until recently no binding agreement governed them.
That changed in January 2026, when the Agreement on the Conservation and Sustainable Use of Marine Biological Diversity of Areas Beyond National Jurisdiction, known as the BBNJ Agreement or High Seas Treaty, entered into force after reaching 60 ratifications in September 2025. As of early 2026, 82 countries have ratified it. The treaty requires both monetary and non-monetary benefit sharing from commercialization of marine genetic resources collected in areas beyond national jurisdiction. Non-monetary benefits include the sharing of samples, research data, and information about patents and commercialization.
Under Article 12, states must notify a new clearinghouse mechanism before collection, after collection, and when the resources are used for research or commercial purposes. The clearinghouse assigns a standardized identifier to each collection batch, creating a tracking chain from ocean floor to laboratory to market. The BBNJ Agreement does not formally label marine genetic resources as “common heritage of mankind,” but it adopts the principle as a guiding normative framework. Whether patents may be granted for inventions derived from these shared resources remains contested.
The Live Fight Over Space Resources
The sharpest challenge to the doctrine today is in space. With lunar mining moving from concept toward engineering, the question of who owns resources extracted from celestial bodies has split the international community.
The Outer Space Treaty bars national appropriation but says nothing about whether a company or government can extract and own resources it finds.5UNOOSA. Outer Space Treaty The Moon Treaty would close that gap by declaring lunar resources common heritage and requiring an international management regime, but its rejection by every major spacefaring nation has left it inert.4United Nations Treaty Collection. Agreement Governing the Activities of States on the Moon and Other Celestial Bodies
Into that vacuum stepped the Artemis Accords, a U.S.-led framework signed by 61 nations.18NASA. Artemis Accords Section 10 takes the position that extracting space resources does not inherently violate the Outer Space Treaty’s ban on national appropriation. Signatories commit to contributing to multilateral efforts on international practices and rules for space resource extraction, but the Accords do not establish the kind of international management regime the common heritage doctrine requires. The United States reinforced this position domestically through the 2015 Commercial Space Launch Competitiveness Act, which authorized U.S. citizens to own and sell resources they extract from space. Countries skeptical of the Artemis approach argue that allowing extraction without international oversight effectively privatizes the commons.
The U.S. Position and Its Domestic Regime
Because the United States has not ratified UNCLOS, it operates a parallel domestic regime for deep seabed mining. The Deep Seabed Hard Mineral Resources Act (DSHMRA) directs the National Oceanic and Atmospheric Administration to issue exploration licenses and commercial recovery permits to U.S. companies operating beyond national jurisdiction.19National Ocean Service. Deep Seabed Hard Minerals Mining In January 2026, NOAA issued an updated final rule revising the application regulations for both license types.
DSHMRA once paired U.S. deep seabed mining with a Deep Seabed Revenue Sharing Trust Fund meant to collect taxes from mineral recovery. The underlying tax provision was repealed in 1997.20Office of the Law Revision Counsel. 30 USC 1472 – Deep Seabed Revenue Sharing Trust Fund The fund’s structure remains in the U.S. Code, but no revenue-sharing mechanism is currently operational under U.S. law. That absence is a pointed contrast with the ISA’s benefit-sharing mandate, and it is part of why the common heritage doctrine and the U.S. domestic regime remain, for now, two separate legal universes covering the same ocean floor.