The additional assistant referees system experimented with in the Europa League will be used in the Champions League this year.
The decision was ratified at yesterday's meeting in Cardiff of the technical sub-committee of the International Football Association Board, football's rule-makers, where it was also confirmed the issue of goal-line technology would be discussed in October.
The system of extra officials will be used in the Champions League, Europa League and Super Cup this season, as well as a handful of other competitions around the world after IFAB opened the experiment up to confederations outside of Europe.
The experiment is due to continue until 2012.
That technology was not discussed yesterday will be a disappointment, though not a surprise, to many.
IFAB, which comprises representatives from FIFA and the four home nations, rejected the notion of goal-line technology in March on the grounds of cost and the disruption it could bring.