What are the basic knowledge of football?

3. Each team can have 1-2 substitutes during the competition. If it is a "friendship match", there may be less than five substitutes.

With the consent of the referee, when the game is suspended, the substitute players can replace the players.

5. Substitutes can't play until they leave the field.

6. No player is allowed to play or leave without the consent of the referee.

Chapter IV Athletes' Equipment

1. The necessary equipment for players on the field is: sports shirts, shorts, socks, leg protectors, football shoes, and it is not allowed to wear anything that can endanger other athletes.

Leggings must be completely covered by socks and made of suitable materials (rubber, plastic, polyurethane or other similar materials).

3. The color of the goalkeeper's clothing must be different from that of other players and referees' substitute goalkeepers or any other players, and the following provisions shall be observed:

A. the referee should be informed before the substitution.

B. Substitutes can only enter the playing field after they leave the field and get permission from the referee.

C. when the game is a dead ball, the substitute should enter from the center line.

D. the replaced players are not allowed to participate in the competition again.

E. The referee has the right to exercise power over the substitutes whether they play or not.

4. When the substitute enters the competition field, he becomes a player on the field, and the player who is replaced is no longer a player on the field, so the substitute is over.

Fines:

A. For those who violate Article (4) of this chapter, the game shall not be suspended, and all relevant players shall be warned immediately when the game becomes a dead ball.

B. If the substitute player enters the game without the permission of the referee, he should stop the game and give a warning to the substitute player to leave or be punished according to the situation, and then the referee will throw the ball at the place where the game was suspended to resume the game. Unless the ball was in the goal area at that time, in this case, the ball should fall on the goal area line parallel to the goal line where the ball was closest when the game stopped.

C related players who violate other rules in this chapter will be warned. If the referee suspends the game to carry out the warning, the opposing team should kick an indirect free kick where the ball was at the time of suspension to resume the game. If a free kick is awarded in one's own goal area, it can be executed anywhere in the goal area; If you punish a free kick in the opponent's goal area, it should be the nearest place when the game is suspended. It is executed on the goal zone line parallel to the goal line.

D. If the competition rules require that the list of substitute players be submitted to the referee before the competition.

Punishment: If a player on the field violates the provisions of this chapter, he should leave the field to adjust or exchange equipment after becoming a dead ball unless he has adjusted his equipment before becoming a dead ball. Players who leave the venue to adjust and exchange equipment must report to the referee before returning to the venue. After the referee checks that it meets the requirements, he can only enter the stadium if the game is a dead ball. Don't stop the game immediately when the players on the spot violate the provisions of this chapter.

Chapter V Referee

One referee should be appointed to perform the referee task in each game. When he entered the playing field, he began to exercise the power given to him by the rules. When the game is suspended or the game is dead, the referee has the right to punish the foul. The judgment made by the referee according to the actual situation of the game such as the result of the game during the game is final. He should:

A. Implementing rules

B. avoid making a penalty in favor of the foul team.

C record the competition results and competition time, so that the competition can last until the specified time or the time agreed by both parties, and make up for the time lost due to accidents or other reasons.

D. The referee has the right to suspend, postpone or terminate the competition due to violation of rules, wind and rain, interference from spectators or outsiders, etc. Afterwards, inform the organizer of the specific situation in writing in accordance with the relevant requirements within the specified time. Once the written report is posted within the specified time, it is in line with the procedure.

E. The referee should give a warning and show a yellow card to the athletes who have misconduct from the moment they enter the competition field. Afterwards, the names and details of the players should be reported to the organizer in writing within the specified time and in accordance with the relevant requirements.

F no one is allowed to enter the venue without the permission of the referee, except the players and linesmen participating in the competition.

G. If the referee thinks that a player is seriously injured, he should immediately stop the game, remove the injured player from the field as soon as possible, and resume the game immediately. If a player is slightly injured, the game should not stop until it becomes a dead ball. Players who can walk to the sideline or goal line by themselves to receive any care are not allowed to receive care on the court.

H. Those who commit violent acts, serious fouls, foul language or abusive language against players on the field, and those who still commit misconduct after being warned, shall be ordered to be present and show a red card.

I. After each game is suspended, signal the resumption of the game.

Chapter VI Border Patrol

Two linesmen shall be appointed for each game, and their duty (determined by the referee) is to signal:

1. When the ball is out of bounds, it becomes a dead ball;

2. Which team should kick a corner kick, goal kick or throw a foul ball;

3. When substitutes are needed. They should also assist the referee to control the game according to the rules. If the linesman misbehaves or improperly interferes with the game, the referee should transfer him from his post and appoint someone else to replace him (the referee should report the situation to the organizer). The flag used by the linesman is provided by the club to which the venue belongs.

Chapter VII Competition Time

The game time should be divided into two equal halves, each of which is 45 minutes. Unless otherwise agreed by both parties under special circumstances, the following provisions shall apply:

A. The time lost due to substitution, dealing with the wounded, delay in time, etc. in each half shall be recovered, and the amount of this time shall be decided by the referee.

B. At the end of each half or after the whole game, if a penalty is awarded, the time shall be extended until the penalty is finished. Unless the referee agrees, the rest time between the first half and the second half shall not exceed 5 minutes.

Chapter 8 the beginning of the game

A. Before the start of the competition, the kick-off or venue should be selected by bidding, and the party who picks first has the right to choose the kick-off or venue. After the referee gives the signal, the game should be started by a player kicking the ball into the opponent's half (that is, kicking the ball released to the center of the playing field). Before the kick-off, each player should be in his own half, and the opposing player should be not less than 9. 15 meters away from the ball; After the ball is kicked out, it must roll to its own circumferential distance before the game starts. The kickoff player is not allowed to touch the ball again before it is touched or kicked by other players.

After the goal, the negative player should kick off again in the same way and continue the game.

C. at the beginning of the second half, the two teams will change venues, and the opponent who kicked off in the first half will kick off.

Fines:

Any kick-off that violates the rules of this chapter will start again. If the kickoff player touches the ball again before it is touched or kicked by other players, the opposing team should be in the foul place.

B. kick an indirect free kick. If the player fouls in the opponent's goal area, this free kick can be executed anywhere in the goal area.

C. direct scoring is not allowed at kick-off.

D. If the ball does not cross the sideline or goal line when the game is suspended due to reasons not specified in these rules, when the game is resumed, the referee shall throw the ball at the position where the ball was suspended, and the game will start again when the ball lands. If the ball is in the goal area when the game is suspended, the ball should fall on the goal line nearest to the ball and parallel to the goal line. When the ball falls, players are not allowed to touch the ball before it lands, otherwise the referee should drop the ball again.

Chapter 9 Competition and Dead Ball

The following conditions are dead balls:

1. When the ball crosses the goal line or sideline on the ground or in the air.

When the game was stopped by the referee.

From the start of the competition to the end of the competition, the competition shall be conducted, including:

A. The ball bounces back from the goalpost, crossbar or corner flagpole.

B. The ball bounced off by the referee or linesman on the court.

C. the referee didn't punish the players for their foul.

Chapter 10 Winning Methods

Unless otherwise stipulated in the rules, if the whole ball crosses the goal line from between the goalposts and under the crossbeam instead of being thrown or brought in by the attacker's hand and deliberately pushed into the goal with his hand or arm (except that the goalkeeper is in his own restricted area), the attacker wins a goal.

In a game, the team that scores more goals is the winning team. If neither side wins or wins equally, the game should be called a "draw".

Chapter 11 Offside

1. Any attacker who is closer to the opponent's goal line than the ball is offside. Except in the following cases:

A. the player is in his own half.

B at least two players of the opposing team are closer to the goal line of the opposing team than that player.

2. When a player plays or touches the ball and the player is offside, the referee thinks that the player has the following behaviors and should be sentenced to offside:

A. interfere with the game or the other side;

B. trying to gain benefits from offside position.

3. A player should not be sentenced to offside under the following circumstances:

A. the player is just offside;

B. Players can directly catch goal kick, corner kick or throw the ball out of bounds.

If a player is judged offside, the referee should judge the opposing player to kick an indirect free kick in the offside position. If the player is offside in the opponent's goal area, then this free kick can be executed anywhere in his offside goal area.

Chapter XII Fouls and Misconduct

A player intentionally violates any of the following nine items, namely:

A. kicking or trying to kick an opposing team member.

B. Tripping the opposing team member, that is, tripping behind or in front of the opposing team or attempting to trip the opposing team.

C. jump to the other team.

D. violent or dangerous collision with the opposing team members.

E. Hit other players from behind unless the other team blocks.

F, if you try to hit the other team, you must spit on the other team.

G. pull the other team.

H. push the opposing team.

1. Touch the ball with your hands, such as dribbling or pushing the ball with your hands or arms (except the goalkeeper in the restricted area).

In all the above cases, the opponent should be sentenced to kick a direct free kick at the foul place. If the foul place is in the opponent's goal area, the free kick can be executed anywhere in the goal area. If the defender intentionally violates any of the above nine items in his own restricted area, he should be awarded a penalty. During the game, if the defender intentionally violates any of the above nine items in his own restricted area, no matter where the ball is at that time, he should be awarded a penalty.

A player commits any of the following five fouls, namely:

1. The referee thinks his actions are dangerous, such as trying to kick the ball that the goalkeeper has caught.

When the goalkeeper is in the penalty area:

A. Hold or throw the ball in any direction in the air after controlling the ball by hand, then catch it and walk for more than 4 steps without making the ball enter the competition state.

B. After holding the ball, touch the ball again by hand according to the situation in Article 5(c), although in the four-step walking process, the ball has entered the game state before the players outside the penalty area or the opposing players inside and outside the penalty area touch the ball.

C. After a player intentionally kicked the ball to the goalkeeper, the goalkeeper touched the ball with his hand.

D. The referee thinks that the team deliberately stops the game for tactical purposes, delays the game time, and makes the team gain improper benefits.

In all the above cases, according to the specific situation in Chapter 13, it is judged that the opponent kicks an indirect free kick at the foul place.

Players should be warned and shown a yellow card under the following circumstances:

F. After the start of the game, the player enters or re-enters the game or leaves during the game (except in unexpected circumstances), in either case, the permission of the referee is not required.

G. If the referee suspends the game to execute the warning, the opponent will kick an indirect free kick where the ball is located to resume the game according to the specific situation in Chapter 13.

H. If the fouler has other more serious fouls, he shall be punished in accordance with the relevant provisions of the rules.

First, the team members violated the rules continuously.

J. express dissatisfaction with the referee's decision by words or actions.

K. there are inappropriate actors.

Except for serious fouls, if a player's behavior falls into any of the last three items mentioned above, he should be given a yellow card warning and ordered to kick an indirect free kick at the foul place according to the specific situation in Chapter 13.

6. If the referee thinks that a player has the following conditions, he should be ordered to play and show a red card:

A. committing acts of violence. Serious foul. C. use foul language or abuse. D. After being given a yellow card warning, he was given a second yellow card warning for foul. The game was suspended because of the punishment. If the player does not violate other rules, according to the specific situation in Chapter 13, the opponent is awarded an indirect free kick at the foul place.

Chapter 13 Free kick

There are two kinds of free kicks: direct free kicks (which can be scored directly into the goal of the offending team) and indirect free kicks (players who play football are not allowed to score directly unless the ball has been kicked or touched by other players before entering the goal).

When a player kicks a direct or indirect free kick in his own restricted area, all opposing players should stand outside the restricted area at least 9 meters away from the ball before the ball is kicked out of the restricted area; 15m. When the ball rolls to the circumferential distance of the ball and leaves the penalty area, the game starts again. The goalkeeper is not allowed to put the ball in his hand before kicking it out of the game. If the ball doesn't kick out of the penalty area directly, it should be kicked again.

When a player kicks a direct or indirect free kick outside his own restricted area, all opposing players should be at least 9. /kloc-balls 0/5 meters away are kicked out unless they are already standing on their own goal line. When the ball rolls to the circumferential distance of the ball, the game starts again.

If the opposing team enters the penalty area or less than 9. /kloc-Before the 0/5m kick-off, the referee should make it retreat to the specified position before executing the penalty.

When kicking a free kick, you must set the ball. Players who kick free kicks are not allowed to touch the ball again until it is kicked or touched by other players. Although other provisions of these rules have stipulated the position of kicking free kicks:

1. When a defender kicks a free kick in his own goal area, it can be executed anywhere in the goal area.

2. When the attacker kicks an indirect free kick in the opponent's goal area, it should be executed on the goal area line closest to the foul place and parallel to the goal line.

Penalty: If the player who kicked the free kick touches the ball again after being kicked out, but before being kicked or touched by other players, the opposing player is sentenced to kick an indirect free kick at the foul place. If the player fouls in the opponent's goal area, this free kick can be executed anywhere in the goal area.

Chapter 14 Penalty kicks

The penalty kick should be kicked from the penalty spot, and the penalty player must be clearly defined. When playing football, all players, except the referee and the opposing goalkeeper, should be outside the penalty area and in the playing field, and at least 9.15m away from the penalty point. Before the ball is kicked out, the opposing goalkeeper must stand on the goal line between the two goalposts (his feet are not allowed to move). The referee must kick the ball forward; Don't touch the ball until other players play or touch it. When the ball rolls to the circumferential distance of the ball, the game starts again. Penalty can be scored directly. When a penalty kick is executed in the middle of a game, or when a penalty kick is executed for an extended period of time at the end of the first half of the game or when a penalty kick is kicked again, if the kicked ball touches any post or two posts; Or touch the crossbar; Or touch the goalkeeper; Or touch the goalpost, crossbeam or goalkeeper continuously and enter the goal. As long as there is no foul, it should be judged as the winning goal.

Punishment: Those who violate the provisions of this chapter shall be dealt with in the following ways:

A. If the defender fouls, the ball will be severely punished if it is not punished.

B. If an attacker other than the penalty shooters commits a foul, the penalty is invalid and should be severely punished.

C. After the game is resumed, if the penalty shooter fouls, the opposing player should kick an indirect free kick at the foul place according to the specific situation in Chapter 13.

Chapter 15 Throwing a foul ball

When the whole ball crosses the sideline on the ground or in the air, it should be thrown in any direction in the court by the opponent who touched the ball last before out of bounds. When pitching, the thrower must face the court, and part of his feet should stand on the sideline or outside the sideline, and not all of them should leave the ground. They should throw the ball into the stadium from beginning to end with both hands. As soon as the ball entered the court, the game resumed. The thrower must not touch the ball again until it is kicked or touched by another player. Throw the foul ball directly into the goal to score.

Fines:

A. If the ball is not thrown into the stadium according to the prescribed method, the opposing team member should throw the foul ball in place.

B. If the thrower touches the ball again after throwing it into the field, but before it is kicked or touched by other players, the opposing player should kick an indirect free kick at the place where the foul occurred. If a player fouls in the opponent's goal area or in his own goal area, he should kick an indirect free kick according to the specific situation in Chapter 13.

Chapter 16 Shooting

When the whole ball crosses the goal line from the outside of the goal in the air or on the ground, and the last player who kicks or touches the ball is the offensive player, the defensive player will directly kick out of the restricted area anywhere in the goal area and resume the game. The goalkeeper can't put the ball in his hand before kicking it out of the game. If the ball doesn't kick out of the penalty area directly, that is, it doesn't enter the game, it should be kicked again. Players who play gateball are not allowed to touch the ball again until it is kicked or touched by other players. Direct scoring is not allowed when kicking gateball. When kicking gateball, the opposing team should stand outside the penalty area before the ball is kicked out of the penalty area. Fines:

Players who kick the gateball out of the penalty area and touch the ball again before it is kicked or touched by other players should be awarded an indirect free kick by the opposing team at the place where the foul occurred. If a player fouls in the goal area, it shall be implemented according to the specific situation in Chapter 13.

Chapter 17 Corner kick

When the whole ball crosses the goal line from the outside of the goal in the air or on the ground, and the defender finally kicks or touches the ball, the attacker will let go of the whole ball. Kick a corner kick in the corner area near the ball out of bounds. When kicking a corner kick, you must not move the corner flagpole. A corner kick can win a goal directly. The opponent of a corner kick player shall not enter within 9.15m from the ball before the ball enters the game, that is, when the ball does not roll to the circumferential distance of the ball. Players who kick corners are not allowed to touch the ball again until it is kicked or touched by other players.

Fines:

A. When the player who kicked the corner touches the ball again before it is kicked or touched by another player, the referee should order the opposing player to kick an indirect free kick where the foul occurred. If a player fouls in the goal area, it shall be implemented in accordance with the specific circumstances of Chapter 13 of the Rules.

B. If there are other fouls, the corner kick will be kicked again.

Standard rules

1. The site area is 150 yards long and 100 yards wide. On each sideline, 25 yards from the finish line, there are two sign posts respectively.

The goal consists of two vertical posts, which are 10 feet apart.

3. Choose the target or tee off with coins.

4. After the first half of the game, change the venue.

5. When a player kicks the ball, when any player on the same team stands in front of the ball and is closer to the opponent's end line than the other team, he shall not take part in the game to touch the ball, nor shall he hinder other players from touching the ball in any way.

6. When the ball kicked out of the sideline, it was a dead ball, and the opponent kicked the ball directly into the court at the out-of-bounds place to resume the game.

7. When a team kicks the ball out of the opponent's end line, any player who gets the ball first can serve a free kick 25 yards from the vertical end line.

8. When kicking off, players should not touch the ball behind the opponent's end line.

9. If the ball falls behind the end line and exceeds the sideline mark, the free kick should be served 25 yards from the end line.

10. When a player kicks a free kick, the player of the same team shall not stand between him and the opposing team, and the opposing team shall not stand within 10 yards from him.

1 1. Players can kick free kicks in any way.

12. If the ball passes between the poles, or passes infinitely high above the poles, you win a goal.

13. In the game, you can touch the ball with any part of your body, but you are not allowed to hold the ball or hit the ball with your hands, arms or shoulders.

14. All impacts are fair and legal, but it is forbidden to hug, push, trip or make noise with your feet.

This set of formal original rules was published by the president of the English Football Association in BELIS LIFE magazine. Three years later, the Football Association increased the goal height by 6 yards and the width by 8 yards, and pulled a rope between the two columns as the goal height.

1 1 football rules for people

Introduction of football competition venues

(1) Stadium

1, the court area must abide by the rules. According to FIFA, the venue of the World Cup finals is105m long and 68m wide. The venue of domestic grass-roots competitions can be adapted to local conditions, but in any case, the length of sideline must be greater than the length of goal line, and the area of each area in the venue shall not be changed.

2. The ground of the court must be flat and soft, with the principle of not hurting athletes and not affecting the normal operation of the ball. The FIFA World Cup Organizing Committee has instructed that the World Cup should not be held on artificial turf.

(2) Boundary line

1. All lines of the stadium must be flush with the ground, and V-shaped grooves or convex lines are not allowed to be made on the ground. The color of the lines should be clear. It is better to use lime powder or mortar to mark the land layer and hydrated lime powder to mark the natural turf layer instead of quicklime powder or mortar. In order to prevent the rain from washing away, you can also draw lines with white paint, but it is not allowed to use grooves filled with wooden strips, bricks or broken tiles as boundaries.

2. The width of each line in the site shall not exceed 12 cm (generally 12 cm is appropriate). The width of sideline and goal line should be included in the field area, and the width of other lines should also be included in the area. The goal area and penalty area should be measured from the inside of the goal post and the outside of the goal line. The width of the goal line must be equal to the width of the goal post.

(3) sideline and goal line

1. The football field delineated by the sideline and the goal line is the basic activity area of the players in the football match. After the game starts, players and other personnel are not allowed to enter the stadium without the permission of the referee.

2. When the whole ball crosses the sideline or goal line outside the goal from the ground or in the air, it is a dead ball, and the game is restarted by throwing a foul ball, kicking a goal ball or a corner kick.

3. The goal line between goals is the standard line to judge whether the ball enters the door. Only when the whole ball crosses the line in the goal from the ground or the air can the ball enter the door.

4. When penalty kick is executed, the defending goalkeeper should stand on the goal line between goals.

5. When kicking an indirect free kick in the opponent's penalty area, if the distance between the goals is less than 9.15m, the defender is allowed to stand on the goal line.

(4) Central line

1. The center line divides the whole site into two equal halves, and the width of the center line should be included in the area of each half.

2. At the kick-off, both players must stand in their own half (defenders are not allowed to enter the middle circle). When the referee blows the whistle, the ball is kicked forward and the game begins. At this time, players from both sides can enter the other half.

3. The player didn't foul offside in his own half.

(5) Target area

1, you can kick the goal ball and your own free kick at any point in the goal area.

When the ball is in the goal area, the referee orders the game to stop. If the game is resumed by dropping the ball, the ball should be dropped on the goal line closest to the position where the ball was when the game stopped, and parallel to the goal line.

3. When kicking an indirect free kick in the opponent's goal area, it should be executed on the goal area line closest to the foul place and equal to the goal line.

(6) Forbidden area

1, the goalkeeper can touch the ball with his hand in his own restricted area.

2. When a player violates any of the ten fouls that can be judged as direct free kicks in his own restricted area, he shall be awarded a penalty.

3. When kicking a goal or a free kick in our penalty area:

(1) The opponent should leave the penalty area.

(2) The ball must be kicked out of the penalty area directly before the game can be resumed.

4. When a penalty is awarded, all players must be in the penalty area, outside the penalty arc and behind the penalty spot except the referee and the opposing goalkeeper; When the ball is kicked out and moves forward, the game starts again, and then the player can enter the penalty area.

(7) Corner arc

When kicking a corner kick, the ball must be placed in the corner arc.

(8) Deduction points

When taking a penalty, the ball must be placed at the penalty spot. When the penalty spot is blurred due to heavy rain, the referee will determine the position of the penalty spot.

(9) Midpoint

The midpoint of the midline is usually called the tee point. When kicking off, the ball must be placed at this point.

(10) middle circle

When kicking off, the defender must stand in his own half outside the middle circle. This is the same as when kicking a free kick, the defender must stand at least 9. 15 meters away from the ball, and its role is to ensure that the attacker is not hindered by the other side when kicking the ball.

(1 1) free throw arc

When awarding a penalty, all players except the referee and the opposing goalkeeper must be in the penalty area, outside the penalty arc and behind the penalty spot; When the ball is kicked out and moves forward, the game starts again, and then the player can enter the free throw arc.

(12) Horn Flag

1. The corner flag is a sign around the field and should be perpendicular to the intersection of the sideline and the outer edge of the goal line.

2. The height of the corner flagpole (from the top of the pole to the ground) shall not be less than 1.50m, and the top of the pole shall be flat to avoid stabbing the players. The color of the corner flag should be obviously different from that of the flag and venue used by the assistant referee. When the lights are used in the game at night, you can use the white flag. Corner flags can be made of cloth or silk, and the specifications are generally 30cm× 40cm.

(13) central line flag

At least 1 m away from the boundary lines at both ends of the center line, a center line flag with the same size as the corner flag can be erected as the symbol of the center line. Conducive to judging offside.

(14) Objectives

The goal of the competition field should be fixed, and the width and thickness of the post and beam should be the same. The target color must be white.

(15) goal net

1. The goal net is used to help the referee see if the ball has entered the goal. Therefore, the goal net can only be hung behind the goal, firmly attached to the goal beam and column, and the lower end is nailed to the ground to prevent the ball from passing through. Hooks shall not be nailed to the side of the doorpost or the lower edge of the beam.

2, the goal net should be properly propped up, so that the goalkeeper has sufficient room for activities, and the ball will not pop up after entering the net. Generally, the method of pulling up the net with a rope from behind the goal is adopted.

(16) Around the construction site

1. According to the requirements of competition organization, a photographer's limit line can be drawn outside the goal line (generally 2 meters outside the corner flag, 3.5 meters outside the intersection of the six-zone line and the goal line, and 6 meters outside the goal post), and the photographer should be behind this line. If there is a billboard in the back.

2. The seat of the fourth official is located on the extension line near the center line outside the venue; The seats of the substitute players are located about 10 meters on both sides of the seat of the fourth official, and are flush with it. The coach, substitutes and staff of each team should be on the bench. The number of substitute seats is determined according to the requirements of the competition organization. At present, it is determined to be 14 in China.

3. Technical field. The word "technical area" has been mentioned in Article 2 of the Resolution of the International Football Council in Chapter 3 of the Rules of Football Competition, and there are seats for team technicians and substitutes in this area.

The size and location of the technical area can be adjusted according to the site conditions. The following are general instructions for setting up technical areas:

(1) The technical area is the area outside the bench 1 m and within the sideline 1 m..

(2) It is suggested to use a marker line to define this area.

(3) The number of people in the technical area shall be stipulated by the competition rules.

(4) According to the competition regulations, the technical personnel should confirm before the competition.

(5) Only one person is allowed to conduct tactical command in the technical area at a time, and should return to the bench immediately after the command is completed.

(6) Coaches and other officials must be in the limited technical area, unless there are special circumstances, such as when physiotherapists or team doctors get permission from the referee to visit injured players.

(7) Coaches and other personnel in the technical area must be responsible for their own actions.

Materials and standards of football

The ball is round and made of leather or other suitable materials. The circumference of a sphere shall not exceed 70 cm (28 inches) and shall not be less than 68 cm (27 inches). At the beginning of the game, the weight of the ball shall not exceed 450g (16 oz) and shall not be less than 4 10/0g (14 oz). The pressure of the ball is 0.6 to 1. 1 atmospheric pressure at sea level (600g to1100g per square centimeter = 8.5 lbs to 15.6 lbs per square inch). Replace the substandard ball if the ball is broken or substandard during the game: stop the game. Replace the standard ball, throw the ball where it broke, and start the game again. If the ball was in the goal area at that time, then the place where the ball fell was on the goal area line parallel to the goal line, which was closest to the position of the ball when the game stopped. If the ball is not broken or not up to standard during the game, such as kick-off, goal kick, corner kick, free kick, penalty or throwing ball, restart the game according to the rules.