The weight of each individual animal at the time of importation determines whether it falls under 010391 (under 50 kg) or 010392 (50 kg or more). Importers should ensure that commercial invoices and entry documents reflect the actual live weight, as misclassification between these subheadings can result in duty discrepancies.

USDA APHIS evaluates the disease status of the exporting country for conditions including African swine fever, classical swine fever, and foot-and-mouth disease. Countries with active outbreaks may face import suspensions or additional testing requirements. Importers should verify current APHIS country status before contracting shipments.