What Does the Expansion of the Artemis Accords Mean for Lunar Governance?

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Key Takeaways

• San Marino became the 76th Artemis Accords signatory on September 25, 2026.
• The accords express political commitments without creating ownership rights over lunar territory.
• Their commercial influence depends on national implementation and practical mission agreements.

The Artemis Accords Add New Signatories

San Marino became the 76th country to sign the Artemis Accords on September 25, 2026, according to the National Aeronautics and Space Administration. The accession followed Türkiye’s signing on August 31 and the September additions of Croatia and Côte d’Ivoire.

The National Aeronautics and Space Administration (NASA) and the U.S. Department of State developed the accords with the original participating countries in 2020. Their purpose is to establish shared principles for peaceful civil exploration and use of space.

The expansion increases the number of governments endorsing those principles. It does not mean that every signatory has a lunar spacecraft under development or has purchased a place on an American mission. Diplomatic participation and operational participation are separate commitments.

That distinction is important for interpreting the growing count. A country can contribute through science or regulation without building a launcher. It can also endorse the principles without receiving a specific commercial contract or mission assignment.

NASA’s Artemis Accords page presents the framework as reinforcing existing international obligations and responsible practices. The accords operate within the broader body of space law rather than replacing it.

New Space Economy’s Artemis Accords explainer describes their political character. Their influence comes from government support and implementation, not from creating a new international court or a universal licensing authority.

The recent accessions also broaden participation beyond countries with established human spaceflight programs. That can give additional governments a channel for discussing how future exploration should be conducted. The practical significance depends on whether those discussions influence national rules and mission agreements.

For the space economy, the relevant question concerns the operating conditions that companies will encounter. A larger diplomatic coalition can support common expectations, but investors and mission developers still need detailed rules about authorization and responsibility. A signature is a starting point for that work rather than a completed commercial framework.

Political Commitments Influence Conduct Without Replacing Treaties

The accords address transparency and peaceful activity, alongside operational cooperation. They also cover registration and the sharing of scientific information. Their provisions connect broad principles with the practical needs of missions that may operate near one another.

Political commitments can influence behavior even when they are not a treaty. Governments may use them when negotiating cooperation agreements or developing national policies. They can also provide a common vocabulary for discussions that would otherwise begin with different assumptions.

That influence has limits. The accords do not give one signatory authority to enforce its interpretation on every other country. They also do not remove obligations arising under applicable international treaties.

A company cannot rely on the accords alone as permission to conduct a mission. National authorization remains necessary where required by the relevant legal system. Export controls and other regulatory obligations can also apply independently of whether the company’s home government has signed.

New Space Economy’s discussion of the accords’ operating principles connects diplomatic commitments with the conduct of exploration. Their strongest practical value may come from reducing avoidable disagreement before missions encounter one another.

Transparency provides one example. Sharing plans can help another government understand what a mission intends to do. The effect depends on what information is shared and whether it arrives early enough to affect planning.

Interoperability provides another. Equipment and procedures that work together can make cooperation easier, but a political endorsement does not produce a technical standard automatically. Engineers and program managers must still agree on interfaces and demonstrate compatibility.

The framework also needs to accommodate differences among participating governments. Some may regulate domestic commercial operators extensively, and others may be developing their institutions. Common principles do not guarantee equal administrative capacity.

The number of signatories is an accessible measure of diplomatic reach. It is a less informative measure of implementation. Evidence of practical effect would include national guidance and mission agreements that translate the principles into responsibilities participants can understand and fulfill.

Resource Extraction and Territorial Ownership Remain Different Questions

The resource provisions attract attention because future lunar activity may involve extracting material. Water and other resources could support exploration or supply later commercial operations. Their usefulness depends on technical feasibility and the cost of obtaining them.

The accords support the position that extracting space resources can be consistent with the existing treaty framework. That position should not be restated as a general grant of ownership over lunar territory. The act of using material and the assertion of sovereignty over a location involve different legal questions.

A government’s endorsement also does not prove that a resource project has been approved. A company still needs a specific mission plan and the applicable authorization. It must establish how it will operate safely and how its activities will interact with other missions.

New Space Economy’s examination of lunar resource rights describes the commercial significance of these unresolved questions. Resource access can affect investment, but legal arguments do not establish a mineable deposit or a profitable business.

The distinction between a resource and a reserve is relevant even before legal questions arise. Evidence that a material exists does not establish that it can be extracted economically. Conditions at the site and the performance of the required equipment influence the commercial assessment.

Future operators may also need access to power and communications. A resource project could depend on services provided by other missions, creating contractual relationships beyond the extraction activity itself. Those dependencies make predictable operating rules valuable.

The accords do not establish a universal system for resolving every possible dispute about resources. Governments continue discussing resource activities through broader international processes, including work within the United Nations. Participation in the accords does not eliminate the need for that wider engagement.

For investors, the useful distinction is between policy support and legal certainty at the project level. The accords can demonstrate that a government supports a particular approach. A financeable project still needs a clear chain of authorization and a credible assessment of its commercial demand.

Coordination Measures Must Preserve Access

Missions operating near one another can interfere even without intending to do so. Activities on the lunar surface may produce physical effects that reach beyond a spacecraft’s immediate footprint. Communications and the use of limited operating areas can also create coordination needs.

The accords discuss measures intended to avoid harmful interference, including the use of information about activities and temporary safety arrangements. Such arrangements should be understood in relation to the activity and its effects. They are not a general mechanism for claiming territory.

The scale and duration of an arrangement matter. A measure tied to an operating hazard differs from an indefinite exclusion covering a large region. Practical implementation needs to remain connected to the reason for coordination and to the principles of access and due regard.

New Space Economy’s treatment of shared lunar governance connects safety with the need to avoid sovereign claims. The commercial problem involves giving operators enough predictability to plan without allowing safety language to become an unrestricted means of excluding competitors.

Transparency can help, but published information must be usable. Other missions need to understand where an activity will occur and what consequences it could produce. Vague statements that an area is important to a mission provide less operational value than specific descriptions of the activity.

Coordination also requires contact arrangements. A mission may need to communicate with another operator when schedules change. A diplomatic commitment has limited practical value if the relevant operational organizations cannot reach each other or lack authority to make adjustments.

Different missions may value the same location for different reasons. Scientific observations and resource operations can create competing requirements even when both activities are lawful. A functioning coordination process needs to identify those conflicts early enough for alternatives to be considered.

The accords provide principles for addressing such situations among participating governments. Their broader legitimacy will depend partly on whether implementation remains understandable to nonparticipants and avoids treating membership as a condition for basic access to space.

Commercial Effects Depend on Implementation

The commercial influence of the Artemis Accords is likely to appear through contracts and program requirements before it appears as a single global market rule. Governments can incorporate shared expectations into cooperation agreements. Mission customers can also require compatible procedures.

For companies, that can reduce uncertainty about what a partner expects. A common approach to information sharing or equipment compatibility may lower the cost of negotiating each mission. The benefit depends on the specificity of the resulting arrangements.

The accords do not guarantee procurement access. A company based in a signatory country may still face domestic purchasing rules and export restrictions. It should not interpret its government’s signature as automatic eligibility for every American space contract.

Smaller space programs can participate without reproducing the complete capabilities of larger agencies. A contribution to a scientific instrument or a supporting service can be valuable within a larger mission. The allocation of work still depends on separate agreements and demonstrated capability.

New Space Economy’s coverage of international space cooperation illustrates how broad diplomatic alignment connects to more detailed legal arrangements. Cooperation is implemented through defined projects and responsibilities, rather than through general statements alone.

Finance remains another constraint. A shared set of principles can improve confidence about government intentions, but it cannot substitute for a paying customer. New Space Economy’s analysis of space investment addresses the separate need for revenue and credible delivery plans.

The growth to 76 signatories expands the framework’s diplomatic reach. Its economic effect will be determined by what participating governments do next, including how they authorize activities and manage interactions with other states.

Implementation should also be judged by how it handles disagreement. Common principles are easiest to endorse before missions compete for access or experience an incident. Their practical strength becomes more visible when they help governments reach an acceptable response under less convenient conditions.

Summary

The expansion of the Artemis Accords increases international support for a shared approach to civil exploration. It does not create lunar property titles or eliminate the need for national authorization and broader international cooperation.

The next stage of governance concerns institutional capacity. Governments need people and procedures capable of applying the principles to actual missions. That work can give the accords practical meaning even in countries that do not operate their own lunar spacecraft.

Appendix: Useful Books Available on Amazon

• Who Owns the Moon?
• Handbook of Space Law
• Space Law: A Treatise
• Advanced Introduction to Space Law
• The Politics of Space Security: Strategic Restraint and the Pursuit of National Interests

Appendix: Top Questions Answered in This Article

How many countries had signed the Artemis Accords by September 25, 2026?

NASA identified San Marino as the 76th signatory when it signed on September 25, 2026. That count describes governments endorsing the framework. It does not mean that all participating countries operate lunar missions or have received a specific role in the American Artemis exploration program.

Which recent countries joined?

Türkiye signed on August 31, 2026, followed during September by Croatia and Côte d’Ivoire. San Marino signed on September 25. These accessions expanded the diplomatic group, but each country’s practical participation in missions or commercial projects depends on separate decisions and agreements.

Are the Artemis Accords a treaty?

The Artemis Accords are political commitments that describe shared principles for civil exploration and use of space. They reinforce existing treaty obligations rather than replacing them. Their practical influence depends on implementation through national policies and cooperation arrangements, rather than a new universal enforcement authority.

Do the accords grant ownership of lunar territory?

The accords do not grant sovereignty or ownership rights over lunar territory. Their treatment of resource extraction concerns the use of material and its relationship to existing space law. A territorial claim is a separate issue, and signing the accords does not create a lunar property title.

Does signing authorize a company to mine the Moon?

A signature does not authorize a particular commercial mission. A company still needs the applicable national approvals and a viable project plan. Technical feasibility and commercial demand also remain separate questions, so diplomatic support cannot establish that extraction will succeed or generate a profit.

What is the purpose of safety arrangements?

Safety arrangements support coordination intended to avoid harmful interference between activities. Their justification depends on the nature and effects of the operation. They should not be treated as an automatic right to exclude others indefinitely from a large area or as a substitute for territorial ownership.

Can a country participate without building rockets?

A country can support exploration through scientific work or specialized services without operating a launcher. Signing the accords also provides a diplomatic channel for participation in discussions about responsible conduct. Specific contributions and mission roles still require separate agreements and appropriate technical capability.

Do the accords guarantee access to NASA contracts?

The accords do not override procurement rules or export controls. A company’s eligibility for a contract depends on the terms of that procurement and the applicable laws. A government’s signature can support cooperation but does not automatically qualify every domestic company for American space business.

Why does interoperability matter?

Interoperability allows equipment or procedures from different participants to work together correctly. It can reduce the cost and difficulty of cooperation. Political support for interoperability is useful, but engineers and program managers still need specific standards and testing to establish that the systems are compatible.

What would demonstrate successful implementation?

Practical evidence would include clear national guidance and mission agreements that define responsibilities. Useful coordination during an actual operational conflict would provide stronger evidence than membership growth alone. Implementation also needs sufficient administrative capacity to apply the principles consistently when missions encounter difficult choices.

Appendix: Glossary of Key Terms

Artemis Accords

Political commitments setting out shared principles for peaceful civil exploration and use of space. They address responsible conduct and cooperation within the existing treaty framework, but they do not establish a universal regulator or grant ownership of lunar territory.

Harmful Interference

An effect of one activity that adversely affects another activity in a legally or operationally relevant way. Preventing such interference can require information sharing and consultation, with the appropriate measures depending on the missions involved.

Space Resources

Materials that may be obtained from celestial bodies or elsewhere in space. Their presence does not establish economic recoverability, and a proposed extraction project still needs technical feasibility and the applicable legal authorization.