If you replicate the Targeted Agent Settings policy (in the Settings tree: Settings > Agents/Plug-ins > Symantec Management Agent > Settings > Symantec Management Agent Settings - Targeted) to child Notification Servers, the replicated policy is editable on the children.
This replicated policy should not be editable. Replicated system policies should be read-only on child Notification Servers, and you should not be able to modify or delete them. Note that any changes that you make to this policy on a child Notification Server is overwritten on the next replication schedule, when the same policy is replicated again from the parent.
This issue has been fixed under Symantec Management Platform (SMP 7.5).
ITMS 7.1 SP2