http://www.gibfocus.gi/details_headlines.php?id=1316
In a covert operation Odyssey Marine has confirmed that the company has shipped the recently found 17 tons of treasure out of the port of Gibraltar aboard a 757 chartered airline. The treasure is considered to be that of the Merchant Royal, a 17th century merchant ship.
It is not known if Odyssey had to pay duties to the authorities in Gibraltar prior to the 17 tons of silver being taken aboard.
Gibraltar is a freeport and most likely the only place where Odyssey could have transported the recovered treasure back to the USA without its' being impounded.