My 2 friends share 3 deeds between us. Each of us on our deed have created roles for each of us with everything checked off. We have each other checked as Trusted Friends. We can now do anything on each others land. So in the event that any of us that need it, the other should have full control of the other's property but this is not the case.
I cannot expand Mike's deed, nor can I give someone permissions to mine there, or drop off goods. I have to get him to do it.