C1
The first two characters of the three character currency code in fields 34F, 90D, and 90C must be the same (Error code(s): C27).
C2
When only one field 34F is present, the second subfield must not be used. When both fields 34F are present, subfield 2 of the first 34F must contain the value 'D', and subfield 2 of the second 34F must contain the value 'C' (Error code(s): C23).