Word-of-the-Afternoon
Cabotage: n. the right of inter-country shipping.
The 1920 Jones Act disallows non-US ships from traveling between two US ports. It is the reason why NJ has no salt, and why there was a gas shortage during Sandy. It gets waived regularly as everyone agrees the law impeeds commerce, but it is a boon for the ship building industry in the US, so it is still on the books.
(PBA moment)