When you import a security rule file, you import the security rules and the security rule components that the file defines. The security rule components include matchers, actions, and processing actions. You can import security rules into an empty rule folder or to the top of the security rule tree. After you import the security rules, update the rule tree.
Before you import security rules, you must create an empty rule folder in the security rule tree. If you import into a rule folder that is not empty, the imported rules override the rules in the rule folder.
If you choose to import the security rules to the top of the security rule tree, the contents of the imported file overrides the existing rules in the rule tree. The existing rules are deleted.