BharatNotes What is Outer Space Treaty 1967?
The Outer Space Treaty (OST) is the cornerstone of international space law. Its formal title is the "Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space, including the Moon and Other Celestial Bodies". It was opened for signature on 27 January 1967 and entered into force on 10 October 1967, administered through the UN Office for Outer Space Affairs (UNOOSA). It had over 110 States Parties (more than 115 per UNOOSA records, as of 2025), including all major spacefaring nations. India signed the treaty in 1967 and is a State Party.
Key Principles
The treaty's core principles flow from its early articles:
| Article | Core principle |
|---|---|
| Article I | Exploration and use of space shall be for the benefit of all countries — space is the "province of all mankind"; free for exploration and use by all states |
| Article II | Outer space, including the Moon and celestial bodies, is not subject to national appropriation by claim of sovereignty, use or occupation |
| Article III | Activities must comply with international law, including the UN Charter |
| Article IV | No nuclear weapons or other weapons of mass destruction in Earth orbit, on celestial bodies, or stationed in space; the Moon and celestial bodies used exclusively for peaceful purposes (no military bases, weapons testing or manoeuvres) |
| Article VI | States bear international responsibility for national space activities, whether by government agencies or non-governmental (private) entities |
| Article VII | Launching states are internationally liable for damage caused by their space objects |
| Article VIII | The state of registry retains jurisdiction and control over its space object and personnel |
| Article IX | Activities must be conducted with "due regard" to the interests of other states, avoiding harmful contamination |
Significance
The OST is significant because it pre-emptively demilitarised space of the most dangerous weapons and blocked colonial-style territorial claims before the technology to enforce them matured. Notably, Article IV bans only WMD in orbit — it does not prohibit conventional weapons or the transit of nuclear missiles through space, leaving the militarisation-versus-weaponisation distinction a live policy debate. Article VI's extension of state responsibility to private actors is increasingly important as commercial spaceflight expands.
Current Status and UPSC Angle
The treaty remains the governing framework, but newer challenges — space debris, anti-satellite (ASAT) tests, resource mining and mega-constellations — strain its 1967-era text. Initiatives such as the US-led Artemis Accords (2020) attempt to interpret resource utilisation within the OST, while the 1979 Moon Agreement (poorly ratified) tried to go further.
For India, the OST shapes the legal context for ISRO, the IN-SPACe single-window agency and the draft national space legislation enabling private participation. Aspirants should connect the treaty's non-appropriation and state-responsibility principles to current affairs on space commercialisation, ASAT capability (India's Mission Shakti, 2019) and the governance of new space activities.
Don't confuse with: the Outer Space Treaty (umbrella principles, 1967) versus the Moon Agreement (1979, on lunar resources, which India has neither signed nor ratified) and the non-binding Artemis Accords (2020).
