C1
Within each occurrence of subsequence A2a, the qualifier in field 24B must be the same as the code word (Status Code) used with the appropriate qualifier in field 25D of its surrounding subsequence A2 (Error code(s): E37).
(*) if the Data Source Scheme is present in field :25D:: then the conditional rule does not apply.
C2
In sequence B, either a quantity (field :36B::) or an amount (field :19A::) must be present, but not both (Error code(s): E58).