Commingled goods with different duty rates: which rate applies?

You are responsible for a shipment of goods that are subject to different rates of duty and are packed together or mingled such that the quantity or value of each class of goods cannot be readily ascertained by CBP officers (without physical segregation of the shipment or the contents of any entire package thereof) by verifying the packing lists at the time of entry. Which of the following is TRUE regarding the rate of duty unless the consignee or his agent segregates the goods?