C.6.4.5.4 Entities Removed From Operational Use
If the SCP supports Removed from Operational Use (0008,0405) (see Section C.6.4.1.2) as a Key Attribute, query responses shall include all entities regardless of the value of that Attribute, unless the SCU has explicitly included matching against that Attribute in the C-FIND request and the SCP supports matching on that Attribute.
Note
As the Study Root Query/Retrieve Information Model - FIND SOP Class is typically used for operational purposes, an SCP implementation of that SOP Class by policy might not return entities with Removed from Operational Use (0008,0405) value "Y".