At least one field must be present after field 22A (Error code(s): C30).
Either field 32B or field 33B may be present, but not both (Error code(s): C12).
Either field 50B or field 52a, but not both, must be present (Error code(s): C06).
Either field 44C or 44D, but not both, may be present (Error code(s): D06).