In a football game, the ball is kicked by both teams in an attempt to score a goal. There are many rules involved in the game, but most of them can be boiled down to a few basic principles. The referee is the main official of the game and has full authority to enforce the Laws of the Game. There are also two assistant referees on the field, who are responsible for signaling when a player is offside or when the ball has been kicked out of play.
The first rule involves timing. The football clock is not stopped unless the ball is thrown out of play, and referees do not stop the game unless there is a significant stop. A half-time period of fifteen minutes is typically the end of the game. Full-time occurs after the game is over, which is usually the end of the second half. A football game lasts about 60 minutes. The length of the game is usually dependent on the level of the game, but there are some exceptions.
In addition to the rules of the game, players can attempt to kick the ball through the goal post to score a touchdown. During fourth down, if a team fails to score a touchdown, they turn the ball over to the defense. In a tie game, a safety occurs when the opposing team travels backwards into its own endzone or when they step out of bounds in the endzone. In the end, the team with the most points will win.