Importers must obtain a USDA APHIS veterinary import permit and provide a health certificate from the country of origin. Birds may also be subject to avian influenza testing and quarantine requirements depending on the source country's disease status.

The 185-gram breakpoint is an internationally harmonized standard used to distinguish newly hatched or very young birds (typically day-old chicks/ducklings) from older, heavier birds. This distinction affects duty rates, health certification requirements, and trade statistics tracking.

Under the standard US MFN tariff schedule, live ducks in this weight category are generally subject to a duty rate of 0.9 cents per head, though preferential trade agreement rates may apply depending on the country of origin.