 16x |
Mandatory in mandatory sequence A
This field specifies the related reference to the commodity deal.
This field must not start or end with a slash '/' and must not contain two consecutive slashes '//' (Error code(s): T26).
When this message is a confirmation of a new contract, the code NEW must be used.
In all other cases, this field must contain the field 20 TRN of the previous MT 601.
The content of field 21, when other than NEW, will normally be a reference meaningful to the Sender rather than the Receiver. This is because the Sender will normally include the content of field 20 from the MT 601 previously transmitted rather than received.
