FIFA president Sepp Blatter has spelled out his plans to allow managers to challenge refereeing decisions via TV replays and said trials could take place in tournaments next year.
Blatter has previously said managers or coaches should be allowed a number of challenges per half if they disagreed with referees' decisions, with a final decision coming after replays had been studied on a monitor.
He said in a video interview played at the Soccerex conference in Manchester: "I will bring it to the attention and perhaps we will find a league, a professional or semi-professional league, they will try to do it.
"It can only be done where there is television coverage of all the matches.
"Or in one FIFA competition, we can try in a youth competition to do so, an under-20, like next year, we are in the under-20 in New Zealand. So we could test such challenge calls.
"Coaches should have the right in the half, twice or once, to challenge a refereeing decision, but only when the game is stopped."
He added: "Then there must be a television monitor, but by the television company and not by another referee.
"And then the referee and the coach, they will go then to look, and then the referee may change his mind, as is the case in tennis, for instance."
Blatter confirmed yesterday that he would definitely stand for a fifth term as FIFA president and accompanied the announcement with a blast at the English Football Association.
Blatter had said in 2011 that he would stand down next year, but he has now confirmed expectations that he will run for another four years.
The Enlgish FA were among countries that had publicly opposed him doing so - and Blatter claimed the English governing body had "forgotten fair play" and were bad losers following its humiliating defeat in the bid for the 2018 World Cup.
The 78-year-old said: "In football, this game that you start to play at the youngest possible level, you learn discipline, respect and fair play.
"If you're at the higher level, you forget that this is discipline, respect and fair play. You've [England] forgotten it.
"But, at least, don't forget that in football, you learn to win, but also to lose. So, therefore, I appeal to all those to go back to the essence of football and then you learn to lose.
"I have lost a lot of times but, if you lose, then you stay there and you try to be better. And then, stay fair, that's all.
"Fair play was invented by England, Great Britain - the beautiful game and fair play. So let's celebrate fair play."