FIFA announced a total of 99 officials for the FIFA World Cup 2018. Of this 36 of them are referees and 63 are assistant referees. Each match in the World Cup will have 1 main referee, 2 assistants referees and 1 VAR (video assistant referee). There are some rules need to be followed before selecting an official for a match and they are:
- Referees and other officials for a match will be selected max 3 days before the match.
- Referee for the FIFA World Cup Final will be selected after the semifinals are over.
- A referee will not be allowed as an official in a match of his national team.
Also, check out FIFA World Cup 2018 referees salary.