Mandatory
This field is used to specify the certificate numbers of the related securities.
This field is used to specify certificate numbers in the format specified by ISO Standard 8532 or an alternative format bilaterally agreed between the Sender and the Receiver.
If there is insufficient space to list all certificate numbers, an MT 579 Certificate Numbers may be used in addition to this field. When the MT 579 is used, the code /MSG579/ must appear in field 72.
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.