This is an enumerated value identifying who owns/manages this specific stored image's policy definition -- for example whether it is owned locally by this UCS domain or by a central UCS Central instance. In an environment using UCS Central to push firmware policies to multiple domains, this tells an admin whether they can modify this specific image's registration locally or whether it is centrally managed and would just get overwritten. A policyOwner of 'pending-policy' on this image would mean it was pushed down from UCS Central and is not meant to be directly edited within this local domain.