In addition to narrative text, structured text with the following line formats may be used:
Optional
This field contains additional information for the Receiver.
The following code may be used:
The structured line format may also be used for bilaterally agreed codes.
Any code must be between slashes and must appear at the beginning of a line.
Narrative text must not begin with a slash and, if used, must begin on a new line and be the last information in the field.
When there is an intermediary bank between the Sender's and Receiver's correspondent, this field should contain the code RCB, followed by the BIC code (or narrative name and address) of the Receiver's correspondent. Note that, the code RCB may only be used if both fields 53a and 54a are present.
This field may include ERI, as specified in the chapter entitled "Euro - Impact on SWIFT Message Standards".