The Code of Vengeance was a set of Andorian laws that allowed for personal combat. It can only be invoked in regards to personal grievances on the assumption that the right person will win. A duel is only appropriate between the aggrieved party and the alledged perpetrator which means that only those two may participate. The code mandates a single duel for each crime in order to prevent an Andorian from facing several members of the same family over the same accusation. Once a duel settles the matter, it is considered closed.