In a very interesting case, the Ninth Circuit Court of Appeals just held that U.S. vessels documented with a fishery endorsement, but operating under a registry endorsement are not "fishing vessels" for the purposes of the Shark Fin Prohibition Act.
A Hong Kong company chartered a Hawaii-based, U.S. documented vessel, King Diamond II, to buy shark fins on the high seas from foreign fishing vessels, intending to land those fins abroad, for further transport to the markets in Asia. The U.S. Coast Guard intercepted the boat on the high seas 250 miles off Guatemala. It seized the fins and detained the King Diamond II. The government filed a forfeiture action to seize the fins. The stipulated fair market value of the fins was $618,956.
The Ninth Circuit found that the Shark Fin Prohibition Act did not provide "fair notice" to the Hong Kong company charterer that operating a vessel under a Registry endorsement, with the aforementioned intent to buy shark fins on the high seas, would bring its activities under the definition of "fishing vessel" in the statute.
The King Diamond II and the fins:
Photos attributed to the Coast Guard available at sciencenews.org.