Officiating Systems
The NFL and college football primarily use a seven-official system. On the other hand, Arena football, high school football, and other levels of football have other officiating systems.
- A three-official system uses only the referee, head linesman, and line judge, or in some cases, referee, umpire and head linesman. It is common in junior high and youth football.
- A four-official system uses the referee, the umpire, the head linesman, and the line judge. It is primarily used at lower levels of football, including junior varsity and some high school varsity.
- A five-official system is used in arena football, most high school varsity football, and in most semi-pro games. It adds the back judge to the four-official system.
- A six-official system uses the seven-official system, without the back judge. It is used in some high school and small-college games.
Read more about this topic: Official (American Football)
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