UEFA has tried the bottom line referee system, made some experience. Now have to promote to the more influential European Champions League, also participate in the experiment are the European Super Cup, the French League Cup, the AFC President Cup and some Brazil, Mexico domestic events.

July 21, 2010 Associated Press, FIFA Wednesday passed a formal resolution to implement a five-referee enforcement system in the 2010/2011 European Champions League, adding two bottom-line referees to help enforce the law in order to reduce the pitch Misunderstanding of the flooding.

The International Football Association Board (IFAB) held a meeting in Cardiff, Wales, focusing on issues related to the referee system reform, focusing on the introduction of the bottom line referee http://cheapfifamer.shop-worlds.com/2017/03/07/no-matter-what-the-terms-of-the-contract . The core of this reform is to maintain a traditional referee, two sides cut the same premise, the addition of two bottom line referee to help the referee law enforcement. They are in the game most of the time standing on the bottom line outside the stadium, responsible for the side of the restricted area of ​​the situation, can effectively curb the occurrence of diving in the restricted area, and improve the penalty penalty, the accuracy of the penalty penalty.