USDA APHIS can restrict or suspend imports of live poultry, including ducklings, from regions where highly pathogenic avian influenza (HPAI) has been detected. Importers must verify that the exporting country or region holds current APHIS approval for live poultry exports and that the health certificate specifically attests to HPAI-free status. Suspension orders can take effect rapidly, so monitoring APHIS notices before shipment is essential for supply-chain continuity.

The 185-gram cutoff separates newly hatched chicks and ducklings — typically day-old birds used in hatchery and grow-out operations — from mature or semi-mature birds classified under heading 010599. This distinction reflects different commercial uses (breeding stock and grow-out supply versus live market birds) and can carry different duty rates. Weight must be verified at the time of export, and health certificates should document the birds' age or weight to support the classification.