Declaration of Legal Principles Governing the Activities of States in the Exploration and Use of Outer Space

Year adopted: 1963
International body: UN General Assembly
Summary: The first formal statement of space law principles, serving as the blueprint for the Outer Space Treaty. It affirms freedom of exploration, non-appropriation, state responsibility, and peaceful use of space.
Full text:
https://www.unoosa.org/oosa/en/ourwork/spacelaw/principles/legal-principles.html