A bill of lading is three things at once: a receipt for the cargo, the contract of carriage, and — sometimes — the title to the goods. That last one is why the paperwork matters. Get the release route wrong and a container sits at the destination port, accruing charges, while an original document travels by courier.
Bills are classified three ways, and the three are independent: by the condition the cargo was in, by who may claim it, and by who issued the document. A single shipment has answers to all three.