When a category or folder has linked rules there are less editing options than when it has its own set of rules. You can either link to a different rule set or you can break the link completely.
When you select the Manage Rules action for a category or folder with linked rules, the Rules page shows the name and path of the category/folder whose rule set is being referenced.
Note: The category/folder might also inherit rules from a parent
category/folder. A message lets you know if this is the case.
Changes to the rule set have to be done in the category/folder where the rules were originally defined. It’s easy to get to the Rules page for the source category/folder: just click View Rule Set.