The PartyDetailsDefinitionRequest (CX) is used for defining new parties and modifying or deleting existing parties information, including the relationships between parties.
The recipient of the message responds with a PartyDetailsDefinitionRequestAck (CY) to indicate whether the request was accepted or rejected.

Added in protocol FIX.5.0SP2 (EP 146)

Field or Component Name Description Is Required Added Is Deprecated
Block StandardHeader MsgType=CX Y FIX.5.0SP2 (EP 146)
1505 PartyDetailsListRequestID Y FIX.5.0SP2 (EP 146)
BlockRepeating RequestingPartyGrp Can be used to identify the party making the request and their role. FIX.5.0SP2 (EP 146)
BlockRepeating PartyDetailsUpdateGrp Specifies the parties and relationships between parties to be defined, modified, or deleted. Y FIX.5.0SP2 (EP 146)
58 Text FIX.5.0SP2 (EP 146)
354 EncodedTextLen FIX.5.0SP2 (EP 146)
355 EncodedText FIX.5.0SP2 (EP 146)
Block StandardTrailer Y FIX.5.0SP2 (EP 146)