Biodiesel from certain countries, including some EU member states, has been subject to antidumping and countervailing duty orders in the past. Importers should query the CBP ADD/CVD portal and USITC records for active orders covering the specific country of origin before contracting for supply, as duty orders can change and retroactive liability is possible.

RFS compliance is separate from tariff classification but directly affects commercial value. Each biodiesel pathway must be registered with EPA and assigned a D-code (typically D4 for biomass-based diesel). Importers must obtain Renewable Identification Numbers (RINs) from the producer or generate them upon import, and the feedstock origin must be documented to support the pathway claim.