Definition: It is the job of the fourth official to assist administrative or other match related tasks as directed by the referee.
A fourth official’s job can include:
- Notifying teams and fans about substitutions and injury time by means of an electronic display or numbered board.
- assessment of players’ equipment.
- Ensuring substitutions are conducted properly.
- Maintaining decorum in the respective teams’ technical areas and reporting any rule breaking to the referee.
Acting as the contact point between the match officiating crew and any non-participants.

