Yes. Oils derived from species listed under CITES (the Convention on International Trade in Endangered Species) require CITES export and import permits. Additionally, the US Marine Mammal Protection Act restricts the importation of products from certain marine mammals. Importers should verify species identity and obtain required permits before shipment.

Chemical modification typically means a reaction that alters the molecular structure of the fatty acids or glycerides — such as hydrogenation, interesterification, or epoxidation. Simple refining steps like degumming, bleaching, or deodorizing do not constitute chemical modification and leave the oil within heading 1504. Hydrogenated fish oil, by contrast, classifies elsewhere.