See the C-MOVE Operation definition for the Query/Retrieve Service Class (Section C.4.2). No Extended Behavior or Relational-Retrieve is defined for the Inventory Query/Retrieve Service Class.

Query/Retrieve Level (0008,0052) is not relevant to the Inventory Query/Retrieve Service Class, and therefore shall not be present in the Identifier. The Unique Key Attribute of the Identifier is the SOP Instance UID (0008,0018). The SCU shall supply one UID or a list of UIDs.