It is the set of the three referees who are responsible for directing a football match. The arbitration list consists of two line judges and the central referee; the first two use communication equipment and two small flags called banners, and the central uses a yellow card, a red card and a whistle, and now with the evolution of technology, also uses intercoms and hearing aids to communicate with the two linesmen, with the fourth referee and with the people in charge of the VAR.
