Title 50 presents regulations governing the taking, possession, transportation, sale, purchase, barter, exportation and importation of wildlife and plants; wildlife refuges; wildlife research; fisheries conservation areas; fish and wildlife restoration; marine mammals; whaling; fisheries; tuna fisheries; and international fishing. Additions and revisions to this section of the code are posted annually by October. Publication follows within six months.

The CFRs are authored by the Office of the Federal Register.