In the Lacey Act, all packages containing dead animals, birds, or parts must be clearly marked when what?

The Lacey Act requires that all packages containing dead animals, birds, or parts must be clearly marked when they are shipped. This is to ensure that the transportation of wildlife, which may be subject to various regulations and restrictions, is properly documented and that law enforcement agencies can easily identify the contents of the packages during transit. This marking is vital for tracking the movement of wildlife and parts to prevent illegal trade and to protect endangered species. Clear labeling at the time of shipment helps maintain transparency in wildlife trade and assists in effective law enforcement efforts.