DDGS derived from grain distilling operations can fall under heading 2303300000 as distilling dregs and waste. However, classification depends on the specific processing method and composition — some DDGS products may be directed to other headings depending on their starch or protein modification. A detailed product specification and, if needed, a CBP binding ruling will confirm the correct classification.

Importers should provide a commercial invoice identifying the source fermentation process (brewing vs. distilling), a certificate of analysis showing moisture, protein, and fiber content, and country-of-origin documentation. FDA may require prior notice for feed ingredients entering human or animal food supply chains, and some states impose additional feed registration requirements.