Is your feature request related to a problem? Please describe.
Yes, #796
I wanted to allow chest access with the usage of a second region within a region and flags, but the issue was that it can break the redstone depending on what was selected.

Describe the solution you'd like
Feature is to add [Public] chests within regions, their purpose would be that it grants access to other players to use. Then there would be [Private] and [Public], [Private] denies access to other players, unless they were granted access, I guess.

Describe alternatives you've considered
Well, I tried doing it with regions, but... #796
I don't really like the signs, I prefer the flags more, but it's causing issues with redstone.