This reports the depth in UCS Manager's org-hierarchy tree at which the policy settings for this slot-array reference were actually resolved. Because this object links one slot-array layout to another, used when a single physical device spans more than one normal slot position, a policyLevel of 0 means the effective settings came straight from the root organization, while a higher number means a sub-organization further down the tree overrode them for this specific instance. In practice this reads 0 for the vast majority of UCS domains, and only climbs to 1 or 2 once an admin has built a multi-tenant org structure and pushed a more specific policy onto a child org.