Is it possible to use a permissions group created at the subsite level as a group at the parent level? As an example, I have a parent site and a subsite. The subsite uses a locally maintained group (Subsite Users), but I want to use this same group at the parent level so that maintaining one level keeps the other level up to date. I want to keep the group maintenance at the subsite level because the admins who will maintain the group won't have edit permissions at the parent level.
In the end, the structure should be like this:
Parent site: Subsite Users members have Read permissions at this level.
Subsite: Subsite Users members have Contribute permissions at this level, and admins of this site have the ability to maintain this list.