As described in "4.5.1.2. Authority, Notice Receiving and Proxy Cancellation" on the "J-GATE3.0_Connectivity_Manual_Commonalities_part", notice retrieval of BO5 and BD6 received by the sponsoring Sub-Participant varies in specification.
For BO5 (and BO93), sub-participant can be specified when subscribing. However, for BD6, sub-participant cannot be specified.