The question behind the question
When a Mars sample-return mission is licensed, when a lander is cleared for a special region, when a commercial operator is told what bioburden limit applies to its spacecraft, the technical reference point is almost always the COSPAR Policy on Planetary Protection. It is easy to read that document as a rulebook. It is not one. COSPAR describes its policy as “a voluntary non-legally binding standard” for spacefaring nations, intended to guide compliance with the 1967 Outer Space Treaty. The Panel on Planetary Protection (PPP) develops, maintains and promotes that standard; it does not enforce it, and it explicitly does not specify the means by which adherence is achieved.
So the sharper question is not who writes binding rules for Mars — no one does, in the treaty sense. The sharper question is who maintains the voluntary standard that treaty parties, licensing authorities and mission operators treat as the reference. That question is answerable, because the Panel’s composition and appointment rules are public. This audit walks through them, because for agencies and regional bodies outside the founding spacefaring bloc, the composition of the Panel is the most concrete lever available.
What the Panel actually is
The PPP’s stated function is to develop, maintain and promote the COSPAR Policy on Planetary Protection and its associated guidelines, and to assist national or international authorities, on their voluntary request, with mission-specific review and assessment. Its policy rests on two rationales: that scientific investigation of chemical evolution and the origin of life must not be compromised, and that Earth must be protected from material returned from planetary missions. The Panel’s own description frames it as “the only international mechanism set up in response to the call in Article IX of the Outer Space Treaty” for appropriate measures against forward and backward contamination.
Two treaty articles anchor the policy. Article IX obliges states parties to conduct exploration so as to avoid harmful contamination and adverse changes to Earth’s environment, and to adopt appropriate measures where necessary. Article VI assigns international responsibility for national activities, governmental and non-governmental, and requires authorization and continuing supervision of non-governmental entities. The 2024 revision of the policy added the Article VI reference; the previous 2021 version cited only Article IX. That addition matters for any state that licenses commercial planetary activity: the voluntary standard now explicitly tracks the supervisory obligation the treaty already imposes.
What the Panel is not: a regulator, a treaty body, or an implementation authority. Its own scope statement reserves the means of compliance to “the engineering judgment of the organization responsible for the planetary mission, subject to certification of compliance … by the national or international authority responsible for compliance with the Outer Space Treaty.” The certification power sits with states, not with COSPAR.
The composition rule, read closely
The Panel’s membership rule is the heart of its institutional design. Per COSPAR’s published description, the Panel “consists in approximately equal numbers” of two categories: appointed members who represent the national or international authority responsible for Outer Space Treaty compliance, and independent scientific expertise, including but not limited to associates of COSPAR Scientific Commissions B (Earth-Moon system, planets and small bodies) and F (life sciences as related to space).
Leadership is deliberately separated from agency representation. The Chair and two Vice-Chairs “shall not represent a national or international authority responsible for compliance with the Outer Space Treaty,” a rule COSPAR justifies on conflict-of-interest grounds: the leadership must “represent all parties without bias.” They are chosen for expertise in fields related to planetary protection and for their ability to oversee the Panel’s work in coordination with its membership.
The appointment mechanics differ by category, and the difference is consequential:
- Agency representatives are appointed by COSPAR “for an indefinite period, subject only to nominations by their respective authorities.” In practice, an agency that nominates a representative holds that seat until it chooses otherwise.
- Independent scientific experts are appointed by COSPAR “upon suggestions by the Panel” for four-year terms, renewable once.
- Chair and Vice-Chairs are appointed by the COSPAR Bureau for four years, renewable once, with possible exceptional extension under the COSPAR Bylaws (Art. XIII.3) concerning highly specialized panels.
All amendments to the policy must be validated by the COSPAR Bureau. The 2024 revision illustrates the sequence: the Panel endorsed the new text on 1 March 2024, and the Bureau approved it on 20 March 2024.
Who is actually in the room
The current roster, as published by COSPAR, shows the design in operation. The Chair is Athena Coustenis (Paris Observatory, planetology), with Vice-Chairs Peter Doran (Louisiana State University, hydrogeology and extreme environments) and Niklas Hedman (space law), all listed with 2022–2028 terms.
The agency-appointed members listed are:
- Omar Hassan Al Shehhi — UAE Space Agency
- Eleonora Ammannito — Italian Space Agency (ASI)
- Masaki Fujimoto — JAXA/ISAS, Japan
- Jan Grosser — German Aerospace Center (DLR)
- Timothy Haltigin — Canadian Space Agency
- Anand Jain — Indian Space Research Organisation (ISRO)
- Christian Mustin — French Space Agency (CNES)
- Karen Olsson-Francis — UK Space Agency
- Jing Peng — China National Space Administration (CNSA)
- Elaine Seasly — NASA
- Silvio Sinibaldi — European Space Agency (ESA)
The independent-scientist members listed span institutions in the United States, France, the United Kingdom, Canada, Japan, China, Russia, Spain and the UAE, covering planetology, microbiology, organic geochemistry, astrochemistry, mechanical and bioengineering, and related fields. Ex-officio members include a representative of the UN Office for Outer Space Affairs, a representative of the US National Academies’ Space Studies Board, and a representative of the COSPAR Committee on Industry Relations.
Read as a map, the roster shows a Panel anchored in the agencies that have historically flown planetary missions and in the scientific communities those agencies fund. That is not a scandal; it is a description. But it has a consequence for anyone outside that circle: the default composition of the body that drafts the reference standard reflects the default composition of the mission-flying club.
What the roster does and does not tell us
An honest audit has to mark its limits. The published roster lists agency-appointed members from specific agencies. It does not establish that other states are absent from planetary-protection discussions through other channels — COSPAR’s open sessions, workshops, and the Panel’s stated practice of holding open meetings alongside official ones are designed for broader participation. The Panel’s own description notes that official meetings are held, when possible, in conjunction with an open meeting at which experts from COSPAR’s National Scientific Institutions, International Scientific Unions and Scientific Commissions, as well as interested scientists, engineers and industry representatives, can discuss matters before the Panel. When the Panel decides, it also holds closed sessions.
So the accurate statement is narrower than “the Global South is excluded.” It is: the appointed seats — the ones with indefinite tenure and a direct line to a treaty-compliance authority — are held by a specific set of agencies, and the roster as published does not show agency-appointed members from Africa, Latin America, Southeast Asia or the small island developing states. Whether that reflects the current state of nominations, the absence of nominating authorities with planetary-protection mandates, or simply the limits of the published list is a question the public record does not resolve. What the record does show is the mechanism by which that could change.
The two levers, and why they matter
Because the Outer Space Treaty is silent on the composition of advisory bodies, the pathway to influence runs through the Panel’s own rules, not through treaty amendment. There are two levers.
The agency-nomination lever. A national or regional authority responsible for treaty compliance can nominate a representative, and that appointment runs indefinitely subject only to the nominating authority. For a space agency in Africa, Latin America, Southeast Asia or a small island state that is building a planetary-science or planetary-protection capability, this is the most direct route into the room where the reference standard is maintained. It requires an agency with a mandate and a nominee with relevant expertise — not a treaty revision.
The independent-expertise lever. Independent scientists are appointed on the Panel’s suggestion for four-year renewable terms. A researcher with peer-reviewed work in astrobiology, microbiology, planetary science or space law can be surfaced through COSPAR’s Scientific Commissions B and F, which the composition rule explicitly names as a source of independent expertise. This route is slower and depends on the Panel’s own suggestions, but it is open in principle to scientists from any COSPAR member institution.
Neither lever guarantees influence over any particular guideline. But both are concrete, and both are more actionable than a general complaint that the rules are written elsewhere.
The tailoring provision: opportunity and burden
The 2024 revision introduced a provision worth understanding precisely. The policy now explicitly states that guidelines “may be tailored while still meeting planetary protection objectives.” COSPAR’s editorial explanation ties this to the Panel’s 2023 Mars paper (Olsson-Francis et al., Life Sciences in Space Research, Vol. 36), which argued that planetary-protection practices should be able to evolve and adapt where there is a scientific basis. The same revision shifted the reporting recommendation: instead of recommending that COSPAR members provide procedures and computations to COSPAR, the policy now recommends that entities conducting outer-space activities provide a reasoned argument that planetary-protection objectives will be or have been satisfied to the authorizing entity of the mission. COSPAR’s stated aim was to limit the perception of COSPAR as a regulator and to avoid concerns about retaining non-public or controlled information.
For capacity-constrained states, tailoring is double-edged. On one side, it creates room for mission designs and scientific priorities that do not fit a prescriptive template — useful for agencies that cannot replicate the cleanroom infrastructure of the largest programs. On the other side, it shifts the burden of justification onto the mission operator and the certifying authority. A state without deep in-house planetary-protection expertise may find it easier to accept a default guideline than to exercise the tailoring option and defend the reasoning. Tailoring is a power that rewards capacity.
Transparency: what is public and what is not
The policy itself is public, and the revision process is documented: a subcommittee was established in 2023, the Panel endorsed the text on 1 March 2024, and the Bureau approved it on 20 March 2024. The Panel’s meetings include open sessions, and its leadership is charged with informing the international community, including the UN Committee on the Peaceful Uses of Outer Space, of the policy.
But the Panel also holds closed sessions when it decides to, and the 2024 revision explicitly sought to avoid COSPAR retaining non-public or controlled mission information. That is a defensible design for a scientific advisory body handling proprietary mission data. It also means that the deliberations and mission-specific reporting that shape the standard are not fully visible to audiences outside the agencies that supply both the members and the data. For a state or regional body trying to understand how a particular guideline came to be, the open-session mechanism is the available channel; whether it is sufficient is a judgment the public record cannot settle.
What this means for the Global South’s seat
The argument of this audit is not that the Panel is illegitimate. Its design — a near-equal split between agency representatives and independent scientists, with leadership barred from representing treaty-compliance authorities — is a serious attempt to produce advice that is neither captured by a single agency nor detached from operational reality. The argument is that the design’s legitimacy depends on who fills the seats, and the published roster shows a body anchored in the agencies that have historically flown planetary missions.
Three practical implications follow for agencies, regional bodies and researchers in Africa, Latin America, Southeast Asia and small island developing states:
- Nominate. An agency with a treaty-compliance mandate and a qualified nominee can seek an agency-appointed seat. The appointment is indefinite and subject only to the nominating authority, which makes it the most durable form of influence available.
- Surface expertise through the scientific route. Researchers with peer-reviewed work relevant to planetary protection can be proposed through COSPAR’s Scientific Commissions B and F, the channels the composition rule names for independent expertise.
- Engage the open sessions and the COPUOS transmission. The Panel’s leadership is responsible for informing COPUOS of the policy; the open-session mechanism is the forum where outside concerns can be raised. Neither substitutes for a seat, but both are entry points.
The rules for Mars are not written by a legislature. They are maintained by a voluntary panel whose composition is public and whose appointment rules are open to any qualifying authority. That is a weaker form of governance than a treaty regime, and a more accessible one. The question for the Global South’s seat at the table is not whether the Panel has the authority to bind anyone — it does not — but whether the states and agencies that will be bound in practice by the reference standard are present when it is drafted. On the published record, that presence is thinner than the standard’s global reach.
Frequently asked questions
Is COSPAR’s planetary protection policy legally binding?
No. COSPAR describes it as “a voluntary non-legally binding standard” for spacefaring nations, intended to guide compliance with the Outer Space Treaty. The binding obligations are in the treaty itself, particularly Articles VI and IX; the COSPAR policy is the technical reference that states and operators use to meet them.
Who appoints the Panel’s members?
Agency representatives are appointed by COSPAR subject to nomination by their respective national or international authorities, for an indefinite period. Independent scientific experts are appointed by COSPAR on the Panel’s suggestion for four-year terms, renewable once. The Chair and Vice-Chairs are appointed by the COSPAR Bureau for four years, renewable once, with possible exceptional extension under the COSPAR Bylaws.
Can the Chair or Vice-Chairs represent a space agency?
No. The Panel’s rules state that the Chair and Vice-Chairs “shall not represent a national or international authority responsible for compliance with the Outer Space Treaty,” a conflict-of-interest provision intended to keep the leadership independent of any single agency.
How does a country join COSPAR?
COSPAR membership runs through national scientific institutions. Recent examples include Peru, which joined through Universidad Nacional de Ingeniería, Lima, announced 4 November 2026, and Kuwait, which joined on 14 March with the Kuwait National Space Research Center as its national scientific institute. Membership in COSPAR is distinct from holding a seat on the Planetary Protection Panel, but it is the institutional base from which participation in COSPAR’s scientific structures, including Commissions B and F, becomes possible.
Does the Panel decide whether a Mars mission is approved?
No. The Panel reviews mission categorization on request and issues categorization where appropriate, and it assists authorities on voluntary request. Approval and certification rest with the national or international authority responsible for treaty compliance. The Panel’s own scope statement reserves the means of compliance to the mission organization’s engineering judgment, subject to that authority’s certification.
Primary sources
- COSPAR, Panel on Planetary Protection (PPP) — membership, leadership, scope, operations, and the current policy reference.
- COSPAR, COSPAR Policy on Planetary Protection, Space Research Today No. 220, July 2024 — the 2024 revision, including the editorial explanation, the Article VI addition, and the tailoring provision.
- COSPAR, COSPAR homepage — membership announcements, including Peru (4 November 2026).
- COSPAR Assembly site, COSPAR 2026 — Kuwait membership announcement (14 March).
- Olsson-Francis, K. et al., “The COSPAR Planetary Protection Policy for missions to Mars: ways forward based on current science and knowledge gaps,” Life Sciences in Space Research, Vol. 36 (2023), pp. 27–35 — the scientific basis cited for the tailoring provision.
- Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space, including the Moon and Other Celestial Bodies (1967), Articles VI and IX.