Football referee by telephone, etc.

What rights do football referees have
1. The referee may send off the players on the court for safety reasons. At this time, the referee shall notify the appointed NFL official (if the official is not present, it can be by telephone, etc.). The official will make a final decision on whether to expel the second participant or contact the Federal Commission to make a final decision. 2. if the referee sends off a member of the teamWhat are the rules of football? How many referees are there in the competition
The ball is oval, like an olive, 11 ~ 11 feet long (27.94 ~ 29.21 cm), 30 ~ 31 feet in longitudinal diameter (76.2 ~ 78.7 cm), 24 ~ 25 feet in transverse diameter (60.96 ~ 64.77 cm), and 13 ~ 15 Gu Si (382.72 ~ 425.24 g)Football rules
Referee: there are three referees in each game, and one chief referee is responsible for executing the rules and mastering the game and timing; Two sideline referees are in charge of one sideline respectively. When the ball or the ball holder goes out of bounds, they raise a flag to signal to the chief referee. Time: it takes 80 minutes to play a rugby game. There are only two halvesWhat does the football referee do
Full court referee: working on the same side of the court, the same as the linesman, with a range of 20 yards. A large range of important information is transmitted to him through the receiver. The player who focuses on the roundtrip of the path, observes the blocking formed or the normalization of the action, and is prepared to use the specified distance to grasp or deal with the irregular roundtrip or prevent the foul behavior to make him cautiousHow does NFL American football "challenge referees" specifically stipulate
Yes, you can challenge the referee for any ball you think is controversial except the last two minutes. If you succeed in each challenge, you don't need to consume a pause. If you fail, you need to consume a pause. Each half court has three pauses, so you can challenge three times. If you fail all the time, you can have countless times if you succeed all the timeFootball rules
The ball is oval in shape and looks like an olive. The ball is 11-11 inches (27.94-29.21 cm) long, 30-31 inches (76.2-78.7 cm) long in longitudinal circumference, 24-25 inches (60.96-64.77 cm) long in transverse circumference, and the ball weighs 13-15 ounces (382.72-425.24 g)Where is the football backcourt referee
The backcourt referee is located at 25 yards in the backcourt. Generally, when the baseline of the court is as close as a honeycomb, the key is to focus on his path and observe the possible blocking or standardization of action in the place where the baseline players are concentrated at the last momentHow do you play football
After the kick-off game starts or scores, the first ball is kicked according to the rules. The kick-off rule of rugby is that the kick-off team will kick at the midpoint of the center line at the beginning of each half court. After one side scores, the other side will kick the ball at or behind the midpoint of the center line. The kickoff team must stand behind the ballFootball rules
In ball games, the rules of American football are more complicated. But that doesn't mean you have to read an obscure rulebook to read football. In fact, it only takes you five minutes to understand the football game. Of course, if you want to understand it deeply, it is another matter. American football is a very competitive gameWhat is the role of a football referee
Referee: control the game. Call all fouls and make a ruling according to the rules. The referee stands 10 to 12 yards from the line of scrimmage, always on the right (if the quarterback is using the right hand). Judge the reasonable collision and observe the legal movement of the far end defensive front. While exercising, observe the quarterback's running and shooting