Import volumes are typically driven by regional logistics — for example, proximity to a specific port or processing facility — or by short-term domestic supply disruptions following drought or crop failure. Specialty non-GMO or identity-preserved corn varieties may also be sourced internationally when domestic supply is insufficient to meet processor specifications.

FDA enforces action levels for aflatoxin in corn intended for human food and animal feed. Importers should request aflatoxin and fumonisin test results from accredited laboratories at origin, as shipments exceeding FDA action levels are subject to refusal of admission. Consult a licensed customs broker or FDA-registered agent for current admissibility requirements.