High Quality Content by WIKIPEDIA articles! In association football, goal-line technology is a proposed technology currently in testing stages, which determines when the ball has completely crossed goal line, assisting the referee in calling a goal or not. So far FIFA, footballs governing body, has resisted goal-line technology as well as other proposed ideas such as instant replay and adding extra officials. FIFA officials do not want the game of football to lose the element of human error or the continuity of the game. However, in the wake of recent controversial calls made in both the FA Premier League and the 2010 World Cup FIFA is now testing potential candidates for goal line technology. Nine systems are currently being tested in stadiums across Europe. A series of tests will be run until March of 2012 that will test for accuracy under different scenarios and settings, such as illumination, speed of the ball, and different angles of trajectory. With multiple systems in testing stages there is competition. If multiple systems meet the criteria and pass the testing stages they will become licensed products by the IFAB and they will be available on the market for different leagues or teams to buy. If FIFA allows goal-line technology it could be applied by the 2014 World Cup in Brazil.