Importers must obtain a USDA APHIS VS permit before shipment. The semen must originate from bulls at an APHIS-approved foreign collection center, and the accompanying health certificate must confirm the bulls are free from specified diseases. The permit specifies approved entry ports and handling conditions. Consult a licensed customs broker and APHIS Veterinary Services well in advance of shipment.

Beyond the APHIS import permit and health certificate, brokers typically need the shipper's invoice identifying the bull(s) by registration number, the liquid-nitrogen container manifest, and evidence that the collection center is on the APHIS-approved list. Some ports require advance notification to coordinate inspection scheduling given the time-sensitive nature of cryogenic shipments.