Deciding whether or not a shot has crossed the line has long been an issue in football. Arguably the most famous incident was in the 1966 World Cup final, when England's Geoff Hurst saw his shot in extra-time bounce down off the underside of the West Germany crossbar. A goal was awarded, giving England a 3-2 lead, with the hosts going on to win the match 4-2. 
England have been at the center of some of the most famous goal-line controversies. At the 2010 World Cup, England and Germany met again in the round of 16. With Germany leading 2-1, England's Frank Lampard hit a shot which struck the bar and landed well over the goal line, but no goal was awarded, and Germany won 4-1. 
At the recent Euro 2012 tournament, England were involved in controversy for a third time. Co-hosts Ukraine needed to beat England to advance from the group stage, but fell behind to a Wayne Rooney header. Artim Milevskiy thought his shot had crossed the line before John Terry was able to hook it clear, but once again no goal was given and Ukraine crashed out. 
Two months earlier Terry had been involved in another goal-line incident, this time for club team Chelsea. In an FA Cup semifinal with Tottenham Hotspur, Chelsea's Juan Mata hit a shot which was inadvertently blocked by Terry, but a goal was given and Chelsea won 5-1. 
Hawkeye ball-tracking technology was first used in tennis in 2006, with players able to challenge calls by umpires and line judges. Each player is allowed three challenges in each set, but they do not lose a challenge if it the technology shows the umpire or line judge made the wrong call. 
Both rugby codes -- league and union -- use a video referee to rule on whether a try should be awarded. The video referee was first introduced at the rugby league Super League World Nines tournament in 1996 and the "Television Match Official" is widely used in possible point-scoring situations. - Goal-line technology approved for use in football
- Global governing body FIFA and IFAB unanimously agreed on decision on Thursday
- FIFA intends for goal-line technology to be used at December's Club World Cup
- Two systems, Hawk-Eye and GoalRef, approved by soccer's lawmakers
(CNN) -- Football's lawmakers have taken the historic step of unanimously approving goal-line technology systems for use in the sport.
World soccer's global governing body FIFA and the International Football Association Board (IFAB) made the announcement following a meeting in Zurich on Thursday.
FIFA intend for goal-line technology to be used at December's Club World Cup in Japan, and if successful it will also be implemented at the 2013 African Cup of Nations and the 2014 World Cup in Brazil.
Two systems, designed by technology companies GoalRef and Hawk-Eye, have been approved after going through two phases of FIFA testing.
UEFA chief opposed to goal-line technology
Euro 2012: Goodbye, Adiós and Ciao 
Platini: Bayern, Chelsea worthy of final The English Premier League welcomed the news, expressing it's intention to bring in goal-line technology in the near future.
"The Premier League has been a long-term advocate of goal line technology," read a statement on the organization's website.
"We will engage in discussions with both Hawk-Eye and GoalRef in the near future with a view to introducing goal-line technology as soon as is practically possible."
The IFAB is comprised of FIFA and the UK-based football associations, the English, Scottish, Welsh and Northern Irish Football Associations.
It is a body which decides on any proposed changes to the rules of soccer.
The announcement follows FIFA President's Blatter's recent calls for goal-line technology to be introduced in reaction to an incident that occurred during Euro 2012 in Poland and Ukraine.
Co-hosts Ukraine saw a goal not given during a must-win group-stage match with England, when John Terry cleared Artim Milevskiy's shot after it looked to have crossed the line.
Following the game on June 19, Blatter used his official Twitter account to declare: "After last night's match #GLT is no longer an alternative but a necessity."
But his stance on the issue is at odds with Michel Platini, the president of European football's governing body UEFA.
The UEFA chief told CNN in May: "I'm against the technology. If you say OK to goal-line technology, then it is offside technology, then penalty area technology, and we stop the football.
"I want human people -- it's easy. I understand the fans because they want justice but with an additional referee we have the same justice."
In addition to Milevskiy's "goal" at Euro 2012, England have been involved in two other high-profile goal-line controversies.
Midfielder Frank Lampard saw a goal not given at the 2010 World Cup when his shot appeared to land well beyond the line in a round of 16 match against Germany.
In the 1966 World Cup final, England were awarded a goal against West Germany when Geoff Hurst's shot in extra-time rebounded off the underside of the crossbar. England went on to win the match 4-2 at Wembley.
