HTS code 1504.20.20.00 covers "Fats and oils and their fractions, of fish or marine mammals, whether or not refined, but not chemically modified › Fats and oils and their fractions, of fish, other than liver oils › Cod" under the US Harmonized Tariff Schedule. This is the official duty rate charged by US Customs when this product is imported into the United States, sourced directly from the U.S. International Trade Commission and refreshed daily.