(1) The carrier may lodge objections against the person entitled under the consignment bill only insofar as they concern the validity of the statements made in the consignment bill, or insofar as they arise from the contents of the bill of lading, or insofar as the carrier is directly entitled to such objections vis-à-vis the person entitled under the consignment bill. An agreement to which the consignment bill merely makes reference is not incorporated into the consignment bill.
(2) If the person entitled under the consignment bill asserts a claim against the actual carrier pursuant to section 437, the actual carrier, too, may raise the objections pursuant to subsection (1).