FIFA has licensed a third goal-line technology system as a candidate to be selected for use at the 2014 World Cup in Brazil.
Cairos, a German system using magnetic field technology, will join Hawk-Eye and GoalRef as officially approved projects, while testing of a fourth system has now been completed.
The Cairos system was tested by independent Swiss institute EMPA, with on-pitch tests carried out at Karlsruhe's Wildparkstadion and at regional side ATSV Mutschelbach before laboratory tests and discussions regarding the FIFA Quality Programme licence.
The FIFA rule-making panel approved goal-line technology last July after Sepp Blatter's long-held opposition relented following Frank Lampard's disallowed goal for England against Germany at the 2010 World Cup.
A statement from Cairos said the company " has met all of the requirements set out by FIFA for its goal-line technology... which passed all of the test criteria, and was subsequently granted an official licence by FIFA for goal-line technology".
Last week, FIFA invited bidders to compete for the World Cup and Confederations Cup contract, with the winner expected to be chosen in April.