The term 'Arena Arbiter' is a job title for a referee, or someone who is responsible for enforcing the rules of a game or sport. The three-letter acronym for this job title is 'REF'. Arena Arbiters are responsible for making sure that all players abide by the rules and regulations of the game, as well as ensuring that the game is played fairly and safely. They also have the authority to issue penalties or warnings to players who break the rules. Arena Arbiters must be knowledgeable about the rules of the game they are officiating and must be able to make quick decisions in order to maintain the integrity of the game.