Lucrative but risky for mob insiders because if they're busted, long prison terms might compel them to cut a deal and squeal. A dope, idiot, useless underling. A LOT of money. A bribe, sometimes for a juror. Old fashioned or older generation Mafiosi.
Violation is punishable by death.
Younger, less traditional generation of Mafiosi. Less likely to live by the old rules. American Mafiosi's derogatory term for Sicilian Mafiosi.