kindlate parameetritega õhuruumi osa, milles pind-õhk-relvasüsteemidel on lubatud mõjutada kõiki õhuvahendeid, mis ei ole tunnistatud omaks, an air and missile defence zone established around key assets or facilities, other than airbases, which merit special protection by surface-based air and missile defence assets where weapons may be fired at any target not positively identified as friendly