How do you compete?
The duration of a game is two 45-minute halves, with an intermission period of no more than 15 minutes. In some cases, it may be higher when there is a tie. Extra time or a series of penalty kicks is applied.
Each match is controlled by a head referee appointed by the organization of the competition in question, who is the ultimate authority of the match and in charge of enforcing the rules of the game. All decisions of the referee are final.
The referee has two assistant referees at his disposal to assist him in making decisions. He also has a fourth referee at his disposal, who is the one who corroborates him, and also controls the seven substitutes and the technical staff. The fourth referee also indicates substitutions and the extension of regulation time.
This sport is played with a spherical ball (made of leather or other material, with a circumference of no more than 70 centimeters and no less than 68 centimeters), and weighing no more than 450 grams and no less than 410 grams at the start of the game.
Football is played on a rectangular field of natural or artificial turf. The permitted dimensions of the field are 90 to 120 meters long and 45 to 90 meters wide. However, for international matches, measures between 100 and 110 meters long and between 64 and 75 meters wide are recommended.