Boxers must not do anything that considered to be impolite to opponents, audiences, yelling, spitting at them, for example.
Boxers/trainers must respect to the referees' final judgements without any objection and boxers must not do any behaviour that to protest the judgement such as do not step down from the ring after the fight or attack the referee etc.
During the fight, when opponent about to loose or being disadavatage, boxer wil not take opportunity to intensify situation eventhough boxer can do that without breaking the rules.
Seniority is very important, younger boxer must pay respect to more senior boxer before and after the fight.