Importers of finished gasoline must demonstrate compliance with RFS blending obligations, either by blending the required volume of renewable fuel before or after import, or by acquiring Renewable Identification Numbers (RINs) to satisfy their obligation. Failure to comply can result in significant civil penalties, so importers typically work with compliance specialists to manage their RIN position.

Distillate fuel oil imports — including diesel and heating oil — must typically meet ASTM D975 (diesel fuel) or ASTM D396 (fuel oil) specifications, with sulfur content limits set by EPA regulations (15 ppm for on-road ultra-low-sulfur diesel). Certificates of quality from the exporting refinery and independent laboratory analysis at the port of discharge are standard documentation requirements.