C1
Field 68B must be used when the immediately preceding field 23 contains either SPOTS or FORWARDS (Error code(s): C85).
C2
Field 68C must be used when the immediately preceding field 23 contains the code word OPTIONS (Error code(s): C86).
C3
The currency in subfield 7 and 10 of field 68B and subfields 7, 9 and 11 of field 68C must be the same (Error code(s): T74).