If the Victory rule does not exist, create it. Add the following text to the Victory rule:-

When a player initiates a duel with the Captain, e may declare immediately before rolling the dice that e is doing a “Formal duel.”  If e does so and looses, e is sent immediately to the Bilge and the rest of this paragraph does not apply to him with regard to that particular duel.  If e wins, e cannot enter the Crew’s Quarters until 24 hours have passed or e loses a duel.  Should 24 hours pass before e loses a duel, e may declare victory.

if the proposal “Ninja Alert 2” passed, add the following text betweed sentences 3 and 4:

Also, e is immune to all shuriken throws for 24 hours.