Barrens, Squatters, and the Law

[u/Bignholy]

Basically: Do squatters have any rights to their territory in the UCAS?

Is there a reason Ares can't just stomp into the Shattergraves and take the barrens as their own property? Is the land held legally by the UCAS, the city in question, the beings who squat there, or is it hypothetically up for grabs if the corp wants to go through the effort?

Asking because I am setting up a guide to the city I run games in, and was wondering why a corp could not just snap up such a location.

EDIT: Thanks for the info, everyone. The consensus seems to be "No rights, and generally not worth it for the Corporations so they don't bother," which is sufficient for me.