could this be it?
The legal issues concerning ownership of extra-terrestrial real estate are still extremely vague. One of the underlying issues is whether private ownership of such property is recognized. As stated by the United Nations 1967 publication "Outer Space Treaty", space is the "province of all mankind", and is not subject to claims on sovereignty by States.[1] As treaties apply to States and place obligations on States, and since the Space Treaties were drafted at a time when, realistically, the only "people" going into space were States, none of the space treaties make reference to private parties. The Outer Space Treaty of 1967 has currently been ratified by 98 states, including all the major space-faring nations.[2]
Legal experts agree that while private ownership of the Moon is not explicitly forbidden, and while Article 6(2) of the Moon Agreement is seen by some as challenging the fundamental notion of non-appropriation in space, property rights on the Moon or other celestial bodies do not exist. The main obstacle to owning a part of the Moon or celestial bodies is that there is no legal system of property law, or indeed any law, on the Moon or celestial bodies, thus no rights of ownership can be created. State sovereignty allows a State to impose and implement its law on its territory, and no state can do this, due to the principle of no-appropriation in space enshrined in Article 2 of the Outer Space Treaty. The Moon Agreement states the "exploration and use of the Moon shall be the province of mankind and shall be carried out for the benefit and in the interest of all countries". Individual ownership rights thus fly in the face of current space law.
However, it should be noted that no major spacefaring nation has ratified the Moon Agreement; thus this treaty was seen as somewhat of a failure, although it was signed by some countries, including Australia, Austria, Belgium and Chile.[2]International Ownership Treaties
Antarctic Treaty System
Law of the Sea
Outer Space Treaty
Moon Treaty
International waters
Extraterrestrial real estate
The legal issues partly depend on which is being discussed:
Land ownership on planets and moons
Ownership of vacant space