Outer Space Treaty
The COSPAR Planetary Protection Policy, and its associated requirements, is not legally binding under international law, but it is an internationally agreed standard with implementation guidelines for compliance with Article IX of the Outer Space Treaty. States Parties to the Outer Space Treaty are responsible for national space activities under Article VI of this Treaty, including the activities of governmental and non-governmental entities. It is the State that ultimately will be held responsible for wrongful acts committed by its jurisdictional subjects.