Football's law-making panel is set to approve goal-line technology, clearing FIFA to use it at the 2014 World Cup.
Two years after Sepp Blatter reversed his opposition to high-tech aids for referees, the FIFA president will help decide on Thursday if two systems passed trials to prove they can accurately judge when balls cross the goal line.
The panel, known as IFAB, could approve either or both of Hawk-Eye and GoalRef for use in leagues and competitions that choose to pay for them.
Blatter has backed goal-line technology since England was denied a clear goal when losing to Germany at the 2010 World Cup.
In June, Blatter said it was a "necessity" after England benefited from another high-profile refereeing error, helping eliminate co-host Ukraine at the European Championship.