C1
In sequence A, if field :20C::SCTR is not present, then field :20C::RCTR is mandatory, otherwise field :20C::RCTR is optional (Error code(s): E68).
C2
In sequence A, the presence of fields :25D:: and :24B:: depends on the value of field :23G:<Function> subfield 1 as follows (Error code(s): E08):
C3
If sequence A field :22a::COLA// is other than SLEB, then sequence B field :19A::TRAA must be present (Error code(s): E65).
(*) if the Data Source Scheme is present in field :22F::COLA// then the conditional rule does not apply.