There is no simple orbital salvage rule
The image of collecting abandoned objects can suggest an analogy with recovering unwanted material on Earth. That analogy is unreliable in space. Under Article VIII of the Outer Space Treaty, ownership of a space object is not affected merely by its presence in outer space or its return to Earth. Loss of function does not automatically create an open right for another operator to capture it.
The State of registry retains jurisdiction and control in the treaty framework. Ownership, registration, operation and involvement as a launching State are related but distinct questions. An old rocket body may therefore require institutional work before a technical team can regard it as an available target. Identifying the correct parties is a substantive part of mission preparation, especially when historical records or organisational successors are difficult to trace.
Separate consent from authorisation
An agreement with an owner can be necessary without being sufficient. Article VI of the Outer Space Treaty establishes State responsibility for national activities in outer space, including activities by non-governmental entities, with authorisation and continuing supervision. A private contract does not replace the applicable national licensing process. Different mission elements can engage different authorities and obligations.
A practical assessment should identify the operator, the relevant licensing jurisdiction, the target’s registry and the parties whose agreement is needed. It should also address radio-frequency coordination, launch arrangements and any restrictions on technical information. The exact legal route depends on the mission and jurisdictions involved. This page explains the questions; it does not provide a universal permission checklist or legal advice.
Liability extends beyond the service contract
The Liability Convention distinguishes between damage on the surface of Earth or to aircraft in flight and damage elsewhere, including in space. Its framework generally provides absolute liability for the former and fault-based liability for relevant damage in space. Applying that framework to a particular operation can be complex, especially where several launching States or multiple objects are involved.
A removal contract may allocate responsibilities, indemnities, insurance requirements and decision rights between participating organisations. Those arrangements do not simply rewrite treaty obligations for everyone else. The mission must consider damage to third parties, fragment generation during capture and consequences of a failed disposal manoeuvre. An appealing environmental objective does not remove the possibility that an intervention itself causes harm.
Distinguish law, standards and guidance
The United Nations Committee on the Peaceful Uses of Outer Space developed the Space Debris Mitigation Guidelines endorsed by the General Assembly. The IADC Space Debris Mitigation Guidelines provide another influential technical reference. These instruments matter, but describing all guidance as directly binding international law would misstate their status. Their practical force can change when requirements are incorporated into national rules, licences or contracts.
ISO 24113 sets out space debris mitigation requirements within a standards framework. The COPUOS Guidelines for the Long-term Sustainability of Outer Space Activities address a broader range of practices and cooperation. Readers should always ask what instrument applies, who has adopted it and how compliance is assessed. A programme’s voluntary pledge and a condition in an operator’s licence are not the same kind of obligation.
Make close approaches interpretable
Technologies used for inspection, servicing and debris removal can share features with capabilities that other actors may consider threatening. A spacecraft approaching another party’s object may therefore create concern even when its stated purpose is environmental. Clear notification, agreed operating limits and appropriate information sharing can help reduce ambiguity. Technical competence alone does not establish trust.
Transparency must also respect legitimate security and commercial restrictions. Not every drawing or navigation product can be made public. The useful aim is proportionate accountability: enough information for authorised parties to understand the operation, assess safety and identify responsibility. Written rules for unexpected contact, loss of control and communication failures are more valuable than a general promise to behave responsibly.
Procure evidence, not only hardware
A removal service specification should define success beyond launch or contact. It can require evidence of target identification, approved approach conditions, completed stabilisation and a verified disposal outcome. It should explain how a partial success or an aborted attempt will be reported. Payment milestones and public communications should not encourage operators to treat a hazardous capture as preferable to a justified retreat.
ESA’s Zero Debris Charter represents a voluntary commitment framework, not a substitute for legal authorisation or mission-specific proof. National regulators, operators and international bodies each have different roles in making responsible behaviour practical. A credible removal effort brings those roles together before flight. Authority is not an obstacle outside the engineering problem; it is one of the conditions that determines whether the intervention should happen at all.