Groats and Meal of Corn (Maize)

The distinction is primarily particle size: corn flour is more finely ground, while cornmeal and groats retain a coarser granulation. CBP and the WCO Explanatory Notes reference sieve-passage thresholds to draw the line. Importers of borderline products should obtain a sieve analysis from the supplier and consider requesting a CBP binding ruling to lock in the correct classification before commercial shipments begin.

There is no US federal import permit specifically for non-GMO corn products, but buyers requiring identity preservation typically demand third-party certification (e.g., Non-GMO Project Verified or equivalent) and segregation documentation throughout the supply chain. FDA may still inspect shipments for general food-safety compliance regardless of GMO status. Importers should ensure that non-GMO claims on labeling comply with FTC and FDA guidance to avoid enforcement risk.