There are traditions bout what do's and don'ts when boxers and seconds/trainers are during the formal competition. Manners in Muay Thai are actually derived from the Thai clture. It is very important for boxers to follow these strictly, and respectfully no matter what nationality they are or where the competition is held;
All of Muay Thai boxer MUST perform Ram Wai Kru, There is an official regulations specify that boxers must perform Ram Wai Kru before the fight.
Boxers must follows the Muay Thai rules strictly and obey to the referees's judgement/instructions without any objections.