When permission limitation is set per subtree and you remove last tree element, then Subtree of location value might be a bit confusing for the customer.
Steps to reproduce
1. Create content structure, for e.g.: /Home/Folder 1/Folder 2/Folder 3.
2. Set permission limitation, for e.g.: content/edit to subtree /Home/Folder 1/Folder 2/Folder 3.
3. Remove Folder 3.
4. Previously created permission limitation will be visible as: content/edit | Subtree of Location: /Home/Folder 1/Folder 2
As discussed with André Rømcke, there should be some note about the limitation on non-existing location, for e.g.:
Subtree of Location: /Home/Folder/Folder 2/<red><Deleted location></red>