for indicating the direction of line balls to the referee. The fourth official is responsible for overseeing substitutions, and also indicating the amount of stoppage time (signalled to him by the referee) and the players substituted using an electronic board. The umpires are responsible for judging the scoring. They indicate to the referee whether a shot was: wide (spread both arms), a kick (raise one arm), a point (wave white flag), square ball (cross arms) or a goal (wave green flag). A disallowed score is indicated by crossing the green and white flags. Other officials are not obliged to indicate any misdemeanours to the referee; they are only permitted to inform the referee of violent conduct they have witnessed that has occurred without the referee's knowledge. A linesman/umpire is not permitted to inform the referee of technical fouls such as a "double bounce" or an illegal pick-up of the ball. Such decisions can only be made at the discretion of the referee. Team of the Century The Team of the Century was nominated in 1984 by Sunday Independent readers and selected by a panel of experts including journalists and former players. It was not chosen as part of the Gaelic Athletic Association's centenary year celebrations. The goal was to single out the best ever 15 players who had played the game in their respective positions. Naturally many of the selections were hotly debated by fans around the country. Team of the Millennium The Team of the Millennium was a team chosen in 1999 by a panel of GAA past presidents and journalists. The goal was to single out the best ever 15 players who had played the game in their respective positions, since the foundation of the GAA in 1884 up to the Millennium year, 2000. Naturally many of the selections were hotly debated by fans around the country. Competition structure Gaelic sports at all levels are amateur, in the sense that the athletes, even those playing at elite level, do not receive payment for their performance. The main competitions at all levels of Gaelic football are the League and the Championship. Of these it is the Championship (a knock-out tournament) that tends to attain the most prestige. The basic unit of each game is organised at the club level, which is usually arranged on a parochial basis. Local clubs compete against other clubs in their county with the intention