This read-only object of type RlIpv6FhsSettingType indicates the provenance of the rlFirstHopSecActivePolicyLogDrop value -- i.e. whether that merged log-drop setting came from an explicit policy, a default, or is otherwise sourced. An admin cares because it distinguishes "this value was deliberately configured" from "this value is just the fallback default," which matters when deciding whether to change a policy or leave the default alone. For example, seeing this object report a default-sourced type for a port would tell an admin no one has explicitly configured log-drop behavior for that port's FHS policy.