This flag indicates whether an admin is even allowed to configure custom utilization thresholds for this particular resource owner, since some resource owners have fixed, non-configurable thresholds built into the platform. Checking this before attempting to set a custom rising/falling threshold on a resource owner saves an admin from a failed configuration attempt on a resource type the platform has deliberately locked down. If this flag reads false for a particular hardware-protected resource owner, an admin trying to set a custom threshold for that owner should expect the operation to be rejected.