Airspace and outer-space governance
- States exercise sovereignty over the airspace above their territory
- No internationally agreed legal altitude separates airspace from outer space
- Outer space is not subject to national appropriation
- States bear international responsibility for national space activities
- Non-governmental space activities require state authorisation and continuing supervision
- Launching states bear international liability for damage caused by their space objects
- Registration-state jurisdiction over a space object differs from sovereignty over outer space
- The Outer Space Treaty imposes specified weapons and celestial-body military restrictions
- Space activities must give due regard to other states and consult over harmful interference