4.3 Apparent condition/packaging of the cargo: if the apparent order and the condition of the cargo and/ or packaging are somehow defective, the consignor, when a cargo letter is provided, must insert on the air cargo letter a statement on this obvious order and condition. In the absence of an air waybill, the consignor must inform the carrier of the apparent order and condition of the cargo, so that the carrier can add a reference to it in the transport protocol. However, if the consignor fails to include such a declaration in the air waybill or to inform the carrier of the apparent order and condition of the cargo, or if such declaration or recommendation is erroneous, the carrier may include it in the air waybill or insert in the article a statement on the apparent order and condition of the cargo or indicate a correction thereto. The air waybill is by far the most important document issued for the international carriage of goods. . . .