Primer
The Moon Agreement
A primer on the one instrument that expressly forecloses private property — and why almost nobody joined it
Opened for signature in 1979, in force since 1984, and binding on seventeen states. Article 11 declares the Moon and its natural resources the common heritage of mankind and states plainly that neither the surface, nor the subsurface, nor resources in place may become the property of any state, organization, or natural person. No major spacefaring nation is a party. It is the clearest answer in space law to the property question, and the one the market rejected.
At a glance
- Opened for signature
- 18 December 1979
- Entered into force
- 11 July 1984
- States parties
- 17
- Signed but not ratified
- 4 states
- Spacefaring parties
- None of consequence
- Legal status
- Binding on its parties only
At United Nations Headquarters in New York, following adoption by the General Assembly on 5 December 1979.
Thirty days after the fifth ratification — the minimum the text required.
Armenia, Australia, Austria, Belgium, Chile, Kazakhstan, Kuwait, Lebanon, Mexico, Morocco, Netherlands, Pakistan, Peru, Philippines, Türkiye, Uruguay, Venezuela. Saudi Arabia acceded in 2012 and withdrew with effect from January 2024 — the first withdrawal from a UN space treaty.
France, Guatemala, India, and Romania signed and never completed ratification.
The United States, Russia, China, Japan, the United Kingdom, and India are all outside it. Australia and Kazakhstan host launch activity; neither is a lunar operator.
A treaty in force, but with no adherence from the states that actually fly to the Moon, its practical reach is close to nil.
The articles that matter
Twenty-one articles, most of them restatements of the 1967 treaty. Article 11 is the reason the document exists, and the reason it went nowhere.
Scope
Applies to the Moon and, by extension, every other celestial body in the solar system except Earth — including orbits and trajectories around them. Asteroids are covered. Meteorites that reach Earth naturally are not.
Province of all mankind
Repeats the Outer Space Treaty formula and adds an obligation of due regard to the interests of present and future generations, and to raising standards of living. The redistributive framing that alarmed Washington starts here.
Samples and mission use
States may collect and remove mineral samples, which remain at their disposal, and may use lunar substances in quantities appropriate to support their missions. This is the one genuine resource permission in the text — and it is scientific, not commercial.
Freedom of activity
Parties may operate anywhere on or below the surface, land, place stations and personnel, and move freely. Broad operational latitude, coupled with a duty not to interfere with others.
Stations
A station may occupy only the area required for its needs, must be notified to the Secretary-General, and must not impede free access to any area of the Moon. Use without exclusivity: the anti-tenure principle expressed in engineering terms.
Common heritage of mankind
The decisive article. The Moon and its natural resources are the common heritage of mankind; no appropriation by any means; neither surface nor subsurface nor resources in place may become the property of any state, organization, or natural person; and parties undertake to establish an international regime, with equitable benefit-sharing, once exploitation becomes feasible.
Ownership of objects
Jurisdiction and control over personnel and hardware are retained, and ownership of vehicles and installations is unaffected by their presence on the Moon. Property in things survives; property in places is expressly extinguished.
State responsibility
Parties bear international responsibility for national activities, governmental or private, and must ensure non-governmental entities operate only under authority and continuing supervision. The Outer Space Treaty's Article VI, restated.
Review
A review conference may be convened on the request of one third of the parties, and must consider implementation of the Article 11 international regime in light of technological developments. The mechanism exists. It has never been used to build the regime.
What it settles
Private property in lunar land is prohibited outright
Article 11(3) is the only sentence in space law that names private parties and denies them title. Not the state, not an intergovernmental or non-governmental organization, not a natural person may own the surface, the subsurface, or any part of it. Landing hardware creates no right of ownership. There is no ambiguity to argue about — for the seventeen states bound by it.
Moon Agreement, Article 11(3)
Resources in place are not ownable either
Where the Outer Space Treaty is silent on ore in the ground, this text speaks: natural resources in place fall under the same prohibition, and their exploitation is deferred to a future international regime with equitable benefit-sharing.
Moon Agreement, Article 11(1), (3), (5), (7)(d)
Scientific sampling is lawful
Parties may collect and remove mineral and other samples, keep them at their disposal, and consume lunar substances in quantities appropriate to support their missions. Apollo-style collection is expressly protected; industrial extraction is not.
Moon Agreement, Article 6(2)
Stations are permitted but never exclusive
A base may occupy only the ground it needs, must be declared annually to the Secretary-General, and may not impede free access to any area. Occupation confers operational presence, never tenure.
Moon Agreement, Articles 8 and 9
What it does not settle
It is unusually clear about what may not be owned, and almost entirely silent about what may be done instead.
What the international regime would actually be
Article 11(5) promises a regime to govern exploitation 'as such exploitation is about to become feasible', and Article 11(7) lists its purposes — orderly development, rational management, expanded opportunity, equitable sharing. It does not say who administers it, how licenses are issued, what security of tenure an operator receives, or how benefits are calculated. Forty-two years on, not a line of it has been drafted.
Moon Agreement, Article 11(5)–(7); no implementing instrument exists
When feasibility arrives
The trigger for negotiating the regime is undefined and self-judging. Commercial lunar landers now fly. Whether that constitutes exploitation being 'about to become feasible' is a question no party has formally posed.
Moon Agreement, Article 11(5)
How it binds anyone who flies
Treaties bind their parties. With no lunar-capable state party, the Agreement governs almost nothing that happens on the Moon. Advocates argue its principles could ripen into customary law; the persistent objection of every spacefaring nation is a substantial obstacle to that claim.
Vienna Convention on the Law of Treaties, Article 34; state practice
Whether Saudi Arabia's exit set a precedent
The 2023 notice of withdrawal, effective January 2024, was the first from any UN space treaty. It reduced the party count and signalled that even non-spacefaring states now weigh the Agreement against the commercial regime forming around them.
UN depositary notification, effective 5 January 2024
Why it failed
Five ratifications brought it into force in 1984. Forty-two years later it has seventeen parties and has lost one. The reasons are worth understanding, because any successor regime will be judged against the same objections.
Common heritage carried Law-of-the-Sea baggage
The phrase arrived from the 1982 UN Convention on the Law of the Sea and its seabed authority, with mandatory technology transfer and production controls. The United States rejected that seabed regime, and the L5 Society campaign against the Moon Agreement — later credited with stopping US ratification in the Senate — argued the same machinery was being extended to the Moon.
Benefit-sharing without defined rights
Article 11(7)(d) commits parties to equitable sharing with special consideration for developing countries. Investors read an open-ended obligation to hand over proceeds from a project whose underlying rights the same article refuses to grant. Few capital structures survive that combination.
It solved a problem the spacefaring states did not have
In 1979 no one was mining anything. The states with the capability saw a treaty that constrained their future options in exchange for benefits from activity only they would undertake, and simply declined.
The vacuum was filled by other means
From 2015 the United States, Luxembourg, the UAE, and Japan legislated ownership of recovered space resources domestically, and the 2020 Artemis Accords declared extraction not to be national appropriation. Seventy-one nations have now signed the Accords; seventeen are party to this Agreement. The direction of travel is not in doubt.
The agreement, as written
The complete annex text as adopted on 5 December 1979 and opened for signature on 18 December 1979. Article 11 repays close reading — paragraph 3 is the sentence the whole debate turns on.
Agreement Governing the Activities of States on the Moon and Other Celestial Bodies
The States Parties to this Agreement,
Noting the achievements of States in the exploration and use of the moon and other celestial bodies,
Recognizing that the moon, as a natural satellite of the earth, has an important role to play in the exploration of outer space,
Determined to promote on the basis of equality the further development of co-operation among States in the exploration and use of the moon and other celestial bodies,
Desiring to prevent the moon from becoming an area of international conflict,
Bearing in mind the benefits which may be derived from the exploitation of the natural resources of the moon and other celestial bodies,
Recalling the Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space, including the Moon and Other Celestial Bodies , the Agreement on the Rescue of Astronauts, the Return of Astronauts and the Return of Objects Launched into Outer Space , the Convention on International Liability for Damage Caused by Space Objects , and the Convention on Registration of Objects Launched into Outer Space ,
Taking into account the need to define and develop the provisions of these international instruments in relation to the moon and other celestial bodies, having regard to further progress in the exploration and use of outer space,
Have agreed on the following:
Article 1
Scope
1. The provisions of this Agreement relating to the moon shall also apply to other celestial bodies within the solar system, other than the earth, except in so far as specific legal norms enter into force with respect to any of these celestial bodies.
2. For the purposes of this Agreement reference to the moon shall include orbits around or other trajectories to or around it.
3. This Agreement does not apply to extraterrestrial materials which reach the surface of the earth by natural means.
Article 2
Compliance with international law
All activities on the moon, including its exploration and use, shall be carried out in accordance with international law, in particular the Charter of the United Nations, and taking into account the Declaration on Principles of International Law concerning Friendly Relations and Co-operation among States in accordance with the Charter of the United Nations, adopted by the General Assembly on 24 October 1970, in the interest of maintaining international peace and security and promoting international co-operation and mutual understanding, and with due regard to the corresponding interests of all other States Parties.
Article 3
Peaceful purposes
1. The moon shall be used by all States Parties exclusively for peaceful purposes.
2. Any threat or use of force or any other hostile act or threat of hostile act on the moon is prohibited. It is likewise prohibited to use the moon in order to commit any such act or to engage in any such threat in relation to the earth, the moon, spacecraft, the personnel of spacecraft or man- made space objects.
3. States Parties shall not place in orbit around or other trajectory to or around the moon objects carrying nuclear weapons or any other kinds of weapons of mass destruction or place or use such weapons on or in the moon.
4. The establishment of military bases, installations and fortifications, the testing of any type of weapons and the conduct of military man uvres on the moon shall be forbidden. The use of military personnel for scientific research or for any other peaceful purposes shall not be prohibited. The use of any equipment or facility necessary for peaceful exploration and use of the moon shall also not be prohibited.
Article 4
Province of all mankind
1. The exploration and use of the moon shall be the province of all mankind and shall be carried out for the benefit and in the interests of all countries, irrespective of their degree of economic or scientific development. Due regard shall be paid to the interests of present and future generations as well as to the need to promote higher standards of living and conditions of economic and social progress and development in accordance with the Charter of the United Nations.
2. States Parties shall be guided by the principle of co-operation and mutual assistance in all their activities concerning the exploration and use of the moon. International co-operation in pursuance of this Agreement should be as wide as possible and may take place on a multilateral basis, on a bilateral basis or through international intergovernmental organizations.
Article 5
Information to the United Nations
1. States Parties shall inform the Secretary-General of the United Nations as well as the public and the international scientific community, to the greatest extent feasible and practicable, of their activities concerned with the exploration and use of the moon. Information on the time, purposes, locations, orbital parameters and duration shall be given in respect of each mission to the moon as soon as possible after launching, while information on the results of each mission, including scientific results, shall be furnished upon completion of the mission. In the case of a mission lasting more than sixty days, information on conduct of the mission, including any scientific results, shall be given periodically, at thirty-day intervals. For missions lasting more than six months, only significant additions to such information need be reported thereafter.
2. If a State Party becomes aware that another State Party plans to operate simultaneously in the same area of or in the same orbit around or trajectory to or around the moon, it shall promptly inform the other State of the timing of and plans for its own operations.
3. In carrying out activities under this Agreement, States Parties shall promptly inform the Secretary-General, as well as the public and the international scientific community, of any phenomena they discover in outer space, including the moon, which could endanger human life or health, as well as of any indication of organic life.
Article 6
Scientific investigation; samples
1. There shall be freedom of scientific investigation on the moon by all States Parties without discrimination of any kind, on the basis of equality and in accordance with international law.
2. In carrying out scientific investigations and in furtherance of the provisions of this Agreement, the States Parties shall have the right to collect on and remove from the moon samples of its mineral and other substances. Such samples shall remain at the disposal of those States Parties which caused them to be collected and may be used by them for scientific purposes. States Parties shall have regard to the desirability of making a portion of such samples available to other interested States Parties and the international scientific community for scientific investigation. States Parties may in the course of scientific investigations also use mineral and other substances of the moon in quantities appropriate for the support of their missions.
3. States Parties agree on the desirability of exchanging scientific and other personnel on expeditions to or installations on the moon to the greatest extent feasible and practicable.
Article 7
Environmental protection
1. In exploring and using the moon, States Parties shall take measures to prevent the disruption of the existing balance of its environment, whether by introducing adverse changes in that environment, by its harmful contamination through the introduction of extra-environmental matter or otherwise. States Parties shall also take measures to avoid harmfully affecting the environment of the earth through the introduction of extraterrestrial matter or otherwise.
2. States Parties shall inform the Secretary-General of the United Nations of the measures being adopted by them in accordance with paragraph 1 of this article and shall also, to the maximum extent feasible, notify him in advance of all placements by them of radio-active materials on the moon and of the purposes of such placements.
3. States Parties shall report to other States Parties and to the Secretary-General concerning areas of the moon having special scientific interest in order that, without prejudice to the rights of other States Parties, consideration may be given to the designation of such areas as international scientific preserves for which special protective arrangements are to be agreed upon in consultation with the competent bodies of the United Nations.
Article 8
Freedom of activity on and below the surface
1. States Parties may pursue their activities in the exploration and use of the moon anywhere on or below its surface, subject to the provisions of this Agreement.
2. For these purposes States Parties may, in particular:
(a) Land their space objects on the moon and launch them from the moon;
(b) Place their personnel, space vehicles, equipment, facilities, stations and installations anywhere on or below the surface of the moon.
Personnel, space vehicles, equipment, facilities, stations and installations may move or be moved freely over or below the surface of the moon.
3. Activities of States Parties in accordance with paragraphs 1 and 2 of this article shall not interfere with the activities of other States Parties on the moon. Where such interference may occur, the States Parties concerned shall undertake consultations in accordance with article 15 , paragraphs 2 and 3, of this Agreement.
Article 9
Stations
1. States Parties may establish manned and unmanned stations on the moon. A State Party establishing a station shall use only that area which is required for the needs of the station and shall immediately inform the Secretary-General of the United Nations of the location and purposes of that station. Subsequently, at annual intervals that State shall likewise inform the Secretary-General whether the station continues in use and whether its purposes have changed.
2. Stations shall be installed in such a manner that they do not impede the free access to all areas of the moon of personnel, vehicles and equipment of other States Parties conducting activities on the moon in accordance with the provisions of this Agreement or of article I of the Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space, including the Moon and Other Celestial Bodies.
Article 10
Safety of persons
1. States Parties shall adopt all practicable measures to safeguard the life and health of persons on the moon. For this purpose they shall regard any person on the moon as an astronaut within the meaning of article V of the Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space, including the Moon and Other Celestial Bodies and as part of the personnel of a spacecraft within the meaning of the Agreement on the Rescue of Astronauts, the Return of Astronauts and the Return of Objects Launched into Outer Space .
2. States Parties shall offer shelter in their stations, installations, vehicles and other facilities to persons in distress on the moon.
Article 11
Common heritage of mankind; the international regime
1. The moon and its natural resources are the common heritage of mankind, which finds its expression in the provisions of this Agreement, in particular in paragraph 5 of this article.
2. The moon is not subject to national appropriation by any claim of sovereignty, by means of use or occupation, or by any other means.
3. Neither the surface nor the subsurface of the moon, nor any part thereof or natural resources in place, shall become property of any State, international intergovernmental or non- governmental organization, national organization or non-governmental entity or of any natural person. The placement of personnel, space vehicles, equipment, facilities, stations and installations on or below the surface of the moon, including structures connected with its surface or subsurface, shall not create a right of ownership over the surface or the subsurface of the moon or any areas thereof. The foregoing provisions are without prejudice to the international regime referred to in paragraph 5 of this article.
4. States Parties have the right to exploration and use of the moon without discrimination of any kind, on the basis of equality and in accordance with international law and the terms of this Agreement.
5. States Parties to this Agreement hereby undertake to establish an international regime, including appropriate procedures, to govern the exploitation of the natural resources of the moon as such exploitation is about to become feasible. This provision shall be implemented in accordance with article 18 of this Agreement.
6. In order to facilitate the establishment of the international regime referred to in paragraph 5 of this article, States Parties shall inform the Secretary-General of the United Nations as well as the public and the international scientific community, to the greatest extent feasible and practicable, of any natural resources they may discover on the moon.
7. The main purposes of the international regime to be established shall include:
(a) The orderly and safe development of the natural resources of the moon;
(b) The rational management of those resources;
(c) The expansion of opportunities in the use of those resources;
(d) An equitable sharing by all States Parties in the benefits derived from those resources, whereby the interests and needs of the developing countries, as well as the efforts of those countries which have contributed either directly or indirectly to the exploration of the moon, shall be given special consideration.
8. All the activities with respect to the natural resources of the moon shall be carried out in a manner compatible with the purposes specified in paragraph 7 of this article and the provisions of article 6, paragraph 2 , of this Agreement.
Article 12
Jurisdiction, control, and ownership of objects
1. States Parties shall retain jurisdiction and control over their personnel, vehicles, equipment, facilities, stations and installations on the moon. The ownership of space vehicles, equipment, facilities, stations and installations shall not be affected by their presence on the moon.
2. Vehicles, installations and equipment or their component parts found in places other than their intended location shall be dealt with in accordance with article 5 of the Agreement on the Rescue of Astronauts, the Return of Astronauts and the Return of Objects Launched into Outer Space.
3. In the event of an emergency involving a threat to human life, States Parties may use the equipment, vehicles, installations, facilities or supplies of other States Parties on the moon. Prompt notification of such use shall be made to the Secretary-General of the United Nations or the State Party concerned.
Article 13
Unintended landings
A State Party which learns of the crash landing, forced landing or other unintended landing on the moon of a space object, or its component parts, that were not launched by it, shall promptly inform the launching State Party and the Secretary-General of the United Nations.
Article 14
State responsibility and liability
1. States Parties to this Agreement shall bear international responsibility for national activities on the moon, whether such activities are carried on by governmental agencies or by non- governmental entities, and for assuring that national activities are carried out in conformity with the provisions set forth in this Agreement. States Parties shall ensure that non-governmental entities under their jurisdiction shall engage in activities on the moon only under the authority and continuing supervision of the appropriate State Party.
2. States Parties recognize that detailed arrangements concerning liability for damage caused on the moon, in addition to the provisions of the Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space, including the Moon and Other Celestial Bodies and the Convention on International Liability for Damage Caused by Space Objects , may become necessary as a result of more extensive activities on the moon. Any such arrangements shall be elaborated in accordance with the procedure provided for in article 18 of this Agreement.
Article 15
Verification and consultation
1. Each State Party may assure itself that the activities of other States Parties in the exploration and use of the moon are compatible with the provisions of this Agreement. To this end, all space vehicles, equipment, facilities, stations and installations on the moon shall be open to other States Parties. Such States Parties shall give reasonable advance notice of a projected visit, in order that appropriate consultations may be held and that maximum precautions may be taken to assure safety and to avoid interference with normal operations in the facility to be visited. In pursuance of this article, any State Party may act on its own behalf or with the full or partial assistance of any other State Party or through appropriate international procedures within the framework of the United Nations and in accordance with the Charter.
2. A State Party which has reason to believe that another State Party is not fulfilling the obligations incumbent upon it pursuant to this Agreement or that another State Party is interfering with the rights which the former State has under this Agreement may request consultations with that State Party. A State Party receiving such a request shall enter into such consultations without delay. Any other State Party which requests to do so shall be entitled to take part in the consultations. Each State Party participating in such consultations shall seek a mutually acceptable resolution of any controversy and shall bear in mind the rights and interests of all States Parties. The Secretary-General of the United Nations shall be informed of the results of the consultations and shall transmit the information received to all States Parties concerned.
3. If the consultations do not lead to a mutually acceptable settlement which has due regard for the rights and interests of all States Parties, the parties concerned shall take all measures to settle the dispute by other peaceful means of their choice appropriate to the circumstances and the nature of the dispute. If difficulties arise in connection with the opening of consultations or if consultations do not lead to a mutually acceptable settlement, any State Party may seek the assistance of the Secretary-General, without seeking the consent of any other State Party concerned, in order to resolve the controversy. A State Party which does not maintain diplomatic relations with another State Party concerned shall participate in such consultations, at its choice, either itself or through another State Party or the Secretary-General as intermediary.
Article 16
International organizations
With the exception of articles 17 to 21, references in this Agreement to States shall be deemed to apply to any international intergovernmental organization which conducts space activities if the organization declares its acceptance of the rights and obligations provided for in this Agreement and if a majority of the States members of the organization are States Parties to this Agreement and to the Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space, including the Moon and Other Celestial Bodies. States members of any such organization which are States Parties to this Agreement shall take all appropriate steps to ensure that the organization makes a declaration in accordance with the foregoing.
Article 17
Amendment
Any State Party to this Agreement may propose amendments to the Agreement. Amendments shall enter into force for each State Party to the Agreement accepting the amendments upon their acceptance by a majority of the States Parties to the Agreement and thereafter for each remaining State Party to the Agreement on the date of acceptance by it.
Article 18
Review
Ten years after the entry into force of this Agreement, the question of the review of the Agreement shall be included in the provisional agenda of the General Assembly of the United Nations in order to consider, in the light of past application of the Agreement, whether it requires revision. However, at any time after the Agreement has been in force for five years, the Secretary-General of the United Nations, as depository, shall, at the request of one third of the States Parties to the Agreement and with the concurrence of the majority of the States Parties, convene a conference of the States Parties to review this Agreement. A review conference shall also consider the question of the implementation of the provisions of article 11, paragraph 5 , on the basis of the principle referred to in paragraph 1 of that article and taking into account in particular any relevant technological developments.
Article 19
Signature, ratification, entry into force
1. This Agreement shall be open for signature by all States at United Nations Headquarters in New York.
2. This Agreement shall be subject to ratification by signatory States. Any State which does not sign this Agreement before its entry into force in accordance with paragraph 3 of this article may accede to it at any time. Instruments of ratification or accession shall be deposited with the Secretary-General of the United Nations.
3. This Agreement shall enter into force on the thirtieth day following the date of deposit of the fifth instrument of ratification.
4. For each State depositing its instrument of ratification or accession after the entry into force of this Agreement, it shall enter into force on the thirtieth day following the date of deposit of any such instrument.
5. The Secretary-General shall promptly inform all signatory and acceding States of the date of each signature, the date of deposit of each instrument of ratification or accession to this Agreement, the date of its entry into force and other notices.
Article 20
Withdrawal
Any State Party to this Agreement may give notice of its withdrawal from the Agreement one year after its entry into force by written notification to the Secretary-General of the United Nations. Such withdrawal shall take effect one year from the date of receipt of this notification.
Article 21
Authentic texts
The original of this Agreement, of which the Arabic, Chinese, English, French, Russian and Spanish texts are equally authentic, shall be deposited with the Secretary-General of the United Nations, who shall send certified copies thereof to all signatory and acceding States.
IN WITNESS WHEREOF the undersigned, being duly authorized thereto by their respective Governments, have signed this Agreement, opened for signature at New York on 18 December 1979.
Text as deposited, 18 December 1979 · United Nations treaty instrument · headings added for navigation
How it compares
| Instrument | Binding? | Extracted resources | In-situ resources | Private-entity rights |
|---|---|---|---|---|
| Outer Space Treaty (1967) | Yes — treaty in force, 110+ parties | Silent | Silent | Permitted but unaddressed; states must authorize and supervise |
| Moon Agreement (1979) | Yes — but only 17 parties, no spacefaring state | Samples for science and mission support only; commercial exploitation deferred | Common heritage of mankind; ownership expressly prohibited | Expressly excluded by Article 11(3) |
| National legislation (US, LUX, UAE, JPN) | Yes, domestically | Ownership recognized for citizens and licensees | Not granted | Yes, over what is recovered |
| Artemis Accords (2020) | No — political commitment, 72 signatories | Extraction is not national appropriation | Silent | None conferred; states only |
Criticism and open questions
Is a treaty with seventeen parties still relevant?
It is in force, and its parties include real economies. A company incorporated in the Netherlands, Australia, Belgium, or Mexico is subject to a state that has undertaken to prohibit exactly the rights that company would need. Jurisdiction of incorporation is not a detail for a lunar venture; it is a threshold question.
Could the Article 11 regime be built rather than abandoned?
Nothing in the text requires the regime to be redistributive machinery. A registry of operating rights with priority, transferability, and dispute resolution would satisfy 'orderly and safe development' and 'rational management' as squarely as any tax. The obstacle is political history, not the drafting.
Does the Agreement block customary law from forming the other way?
Its supporters argue that common heritage now reflects an emerging norm. The counter-argument is stronger: the states whose practice matters have legislated the opposite, and seventy-one have signed an instrument that says extraction is not appropriation. Persistent objection plus contrary practice is how customary claims die.
What should a property-rights advocate take from it?
That the question was asked and answered once, plainly, and the answer was rejected by everyone able to act on it. The lesson is not that the Moon Agreement was wicked, but that a regime denying rights while promising a future committee produces no investment and no compliance. Whatever replaces it has to grant something specific to someone identifiable.
Why it matters here
The Moon Agreement is the control experiment. It took the property question seriously, answered it in the negative, and promised a committee would sort out the rest later. The states with rockets read that and walked away.
It still matters for two reasons. First, it is in force, and companies incorporated in its seventeen parties inherit its prohibition. Second, it demonstrates the failure mode the paper seeks to avoid: a regime that allocates obligations before it allocates rights attracts neither capital nor members.
Sources
- [1]Agreement Governing the Activities of States on the Moon and Other Celestial Bodies, 1363 UNTS 3, adopted by UN General Assembly resolution 34/68 on 5 December 1979, opened for signature 18 December 1979, entered into force 11 July 1984.
- [2]United Nations Office for Outer Space Affairs, treaty text and status of international agreements relating to activities in outer space — unoosa.org/oosa/en/ourwork/spacelaw/treaties/intromoon-agreement.html
- [3]UN depositary notification of the withdrawal of Saudi Arabia, effective 5 January 2024.
- [4]Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space, 1967, Articles I, II, VI, and VIII.
- [5]United Nations Convention on the Law of the Sea, 1982, Part XI (the common-heritage seabed regime the Agreement's language draws on).
- [6]US Commercial Space Launch Competitiveness Act of 2015, 51 U.S.C. §51303; Luxembourg Law of 20 July 2017 on the exploration and use of space resources; UAE Federal Law No. 12 of 2019; Japan Space Resources Act 2021.
- [7]The Artemis Accords, adopted 13 October 2020, Section 10.
This primer is explanatory support material for the paper. It is not legal advice.