UNCLOS offers most practical legal model for outer space for several reasons
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In addressing the philosophical foundations for the medium of space, Hugo Grotius argued that the philosophical foundation of res communis should be applied to the seas. Grotius' ideas are equally persuasive as applied to the vacuums of outer space. Of the three major property endowment theories, res nullius, res publica and res communis, res communis will most effectively encourage outer space travel because the vacuums of outer space will not be subject to control, but will allow for the free passage of all people. In proposing a comprehensive law system for the corpusjuris spatialis for the medium of outer space, the United Nations Convention on the Law of the Sea (hereinafter "Law of the Sea Convention")35 offers the most practicable law system for outer space exploration. Specifically, the Law of the Sea Convention's provisions regarding territorial zones of seas, military use, environmental use, jurisdictional issues, and the general treatment of vessels and their inhabitants, should be incorporated into the corpus juris spatialis with ameliorated changes.
The solutions the international community worked out to resolve some of the most contentious issues over ocean governance -- specifically, how to equitably divide up a common shared resource, how to sustainably manage the global commons for the benefit of all, and how to ensure all states have the freedom to navigate a global common -- have potential to serve as the basis for a similar agreement for outer space.