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The Football Association's desire for goal-line technology to be introduced does not guarantee systems being used in FA Cup matches, even if approval is given in July, it can be disclosed.

Chelsea's 'ghost goal' against Tottenham in Sunday's FA Cup semi-final has thrust the controversy back into the limelight and the game's law-makers will decide on July 2 whether to approve two systems following final tests.

But the FA, while being strongly supportive of goal-line technology, have yet to make a decision on whether a system would be used in their prestige competition.

They are wrestling with the issue of whether it should be used in a competition where some clubs, for example in the Premier League, would have a system in place and others lower down the leagues would not.

FA general secretary Alex Horne said last month the issue was still being discussed, adding: "We have to think about it locally in terms of whether it is enforced in an entire competition or at specific entry points. I don't think we could force 763 clubs to introduce it."

The FA confirmed on Monday that it was still too early for a decision to be taken, but pointed out they had long supported the idea on the International FA Board (IFAB), where they hold one of eight votes.

An FA statement said: "The FA has led the calls at IFAB for the introduction of goal-line technology for over a decade, and we reiterate our desire to see it introduced as soon as possible. No other single body has called as strongly for its introduction as the FA.

"The FA is not responsible for the introduction of goal-line technology in isolation and awaits the outcome of the next IFAB meeting on July 2."

The systems being tested are camera-based one developed by Hawk-Eye, the British company bought out by Sony last year, and GoalRef - a German-Danish firm who have a chip in the ball which is monitored by magnetic fields in the goal.

A GoalRef spokesman confirmed on Monday that their system would function even during the incident involving Chelsea and Tottenham, when Juan Mata's shot struck bodies lying on and over the goal-line.

The spokesman told the Press Association: "GoalRef is for just these sorts of situations.

"It is a simple system with a small transmitter inside the ball and some antennae behind the goals which detect a change in the magnetic field when it crosses the line."

FIFA said the most recent meeting for the next testing of the two systems was held on Friday, and the second phase of tests will start before the end of the month.

Britain's FIFA vice-president Jim Boyce has also been a long-time supporter of goal-line technology, and he believes FIFA president Sepp Blatter will push it through.

He told Sky Sports News: "The big problem was getting it right. Trying a system that was quick and precise and a decision could be made instantly. Sepp Blatter now I think is 100% behind it - not only him but I hope the whole international board will get this introduced and I hope FIFA will get this system that all the public want to see."

Players' union boss Gordon Taylor believes the introduction of technology for such issues is long overdue.

Taylor, the chief executive of the Professional Footballers' Association, said: "I think the more it goes on that we don't use technology, the more perverse it is looking for football, being the major spectator game throughout the whole world as well as the major participant game.

"The sooner it comes in the better."