Each refereeing team was composed by one main referee and two assistant referees from the same country.

Almost a year after that, she operated as an assistant referee in the Premier League, again, the first female ever to do so.

There are three match officials: a referee, and two assistant referees.

He was an assistant referee in the final.

Inform Touch judges or assistant referees what their duties are.

During the game touch judges and assistant referees must:

After he end his international football career he became an assistant referee.

He was appointed as an assistant referee for the Premier League in 1998.

This was followed in 2000 by promotion to the Select Group of assistant referees.

It's just a reference to the officials who run the line now being known as assistant referees.