§ 1661
Robbery ashore
Official text prohibited actmental stateif conditionpenaltylegal term
Whoever, being engaged in any piratical cruise or enterprise, or being of the crew of any piratical vessel, lands from such vessel and commits robbery on shore, is a pirate, and shall be imprisoned for life.
History: (June 25, 1948, ch. 645, 62 Stat. 775 (PDF, 39 MB).)
Simplified explanation
It is a federal crime for anyone on a pirate voyage or pirate ship crew to go ashore and commit robbery. Such a person is a pirate.