Under the respective provisions in 39 U.S.C. 3015(a), (b), or (d), the following items are nonmailable:
- Any injurious animal, the importation or interstate shipment of which is prohibited under 18 U.S.C. 42.
- Any plant pest, the movement of which is prohibited under section 103 or 104 of the Federal Plant Pest Act (7 U.S.C. 150bb or 150cc).
- Any fish or wildlife, the conveyance of which is prohibited under section 3 of the Lacey Act Amendments of 1981 (16 U.S.C. 3372).
For more information, see Publication 14, Prohibitions and Restrictions on Mailing Animals, Plants, and Related Matter.