Da seção DECLARAÇÃO DE AÇÕES de polkit - Estrutura de autorização :
defaults
This element is used to specify implicit authorizations for clients. Elements that can be used inside defaults includes: allow_any Implicit authorizations that apply to any client. Optional. allow_inactive Implicit authorizations that apply to clients in inactive sessions on local consoles. Optional. allow_active Implicit authorizations that apply to clients in active sessions on local consoles. Optional. Each of the allow_any, allow_inactive and allow_active elements can contain the following values: no Not authorized. yes Authorized. auth_self Authentication by the owner of the session that the client originates from is required. auth_admin Authentication by an administrative user is required. auth_self_keep Like auth_self but the authorization is kept for a brief period. auth_admin_keep Like auth_admin but the authorization is kept for a brief period.
Espero que isso deixe claro para você.