For notice retrieval by the authorized Sub Participant, retrieval specifications differ between the order receipt & result notice (BO5, BO93) and the order execution notice (BD6). as descibed in "4.5.1.2.Authority, Notice Receiving and Proxy Cancellation" of the J-GATE Connectivity Manual.
For the broadcast, it is possible to specify which managed Sub Participants' BO5s and BO93's to subscribe to when subscribing.
For the BD6, however, the Sub Participant cannot be specified for such retrieval.