Scarface, the short answer is that there aren't any rules anymore--if ever there were rules. Basically, the Don can do just about anything he wants. The Number One "rule" of the Mafia was: Never break omerta. Look what's happened to that. Everything else went downhill at the same time.
Ntra la porta tua lu sangu � sparsu, E nun me mporta si ce muoru accisu... E s'iddu muoru e vaju mparadisu Si nun ce truovo a ttia, mancu ce trasu.