Mandatory
This field is used to specify the certificate numbers.
This field is used to specify certificate numbers in addition or in lieu of field 35E contained in a primary message in the format specified by ISO Standard 8532 or an alternative format bilaterally agreed between the Sender and the Receiver.
Contrary to ISO Standard 8532, the semi-colon ';' must not be used to indicate the end of the contents of this field. The end of the field is indicated by carriage return line feed followed by a colon, ie, 'CrLf:'.
Also contrary to ISO Standard 8532, the colon ':' must never be used as the first character in a line.