Heifers are female cattle that have not yet calved, while cows have calved at least once. This biological distinction results in separate HTS subheadings (0102294068 vs. 0102294066), and importers must accurately declare the animal's status to avoid misclassification penalties.

Certain tariff-rate quotas (TRQs) may apply depending on the country of origin. Importers should check CBP and USTR quota bulletins to determine whether in-quota or over-quota rates apply to their specific shipment.

Diverting animals declared for immediate slaughter to other uses such as feeding or breeding constitutes a customs violation and may result in penalties, seizure, and potential USDA enforcement action. Proper entry declarations are critical.