Officiating and Procedures

Originally, there was one umpire to judge fouls and one referee to judge the ball; the tradition of calling one official the "referee" and the other one or two the "umpires" has remained (the NBA, however, uses different terminology, referring to the lead official as "crew chief" and the others as "referees"). Today, both classes of officials have equal rights to control all aspects of the game. The NBA added a third official in 1988, and FIBA did so afterward, using it for the first time in international competition in 2006. The use of video evidence to inform referee's decisions has always been banned, except in the case of determining whether or not the last shot of a period was attempted before time expired. This exception was introduced by the NBA in 2002 and adopted by FIBA in 2006. The NCAA, however, has permitted instant replay for timing, the value of a field goal (two or three points), shot clock violations, and for purposes of disqualifying players because of unsportsmanlike conduct. The NBA changed its rules starting in 2007 to allow officials the ability to view instant replay with plays involving flagrant fouls, similar to the NCAA. In Italy's Lega A, an American football-style coach's challenge is permitted to challenge (at the next dead ball) an official's call on any situation similar to the NCAA.
The center jump ball that was used to restart a game after every successful field goal was eliminated in 1938, in favor of the ball being given to the non-scoring team from behind the end line where the goal was scored, in order to make play more continuous. The jump ball was still used to start the game and every period, and to restart the game after a held ball. However, the NBA stopped using the jump ball to start the second through fourth quarters in 1975, instead using a quarter-possession system where the loser of the jump ball takes the ball from the other end to start the second and third periods, while the winner of that jump ball takes the ball to start the fourth period from the other end of the court.
In 1981, the NCAA adopted the alternating possession system for all jump ball situations except the beginning of the game, and in 2003, FIBA adopted a similar rule, except for the start of the third period and overtime. In 2004, the rule was changed in FIBA that the arrow applies for all situations after the opening tap.
In 1976, the NBA introduced a rule to allow teams to advance the ball to the center line following any legal time-out in the final two minutes of the game. FIBA followed suit in 2006.

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Foul , Free Throws and violations

Dribbling was not part of the original game, but was introduced in 1901. At the time, a player could only bounce the ball once, and could not shoot after he had dribbled. The definition of dribbling became the "continuous passage of the ball" in 1909, allowing more than one bounce, and a player who had dribbled was then allowed to shoot.
Running with the ball ceased to be considered a foul in 1922, and became a violation, meaning that the only penalty was loss of possession. Striking the ball with the fist has also become a violation. From 1931, if a closely guarded player withheld the ball from play for five seconds, play was stopped and resumed with a jump ball; such a situation has since become a violation by the ball-carrier. Goaltending became a violation in 1944, and offensive goaltending in 1958.
Free throws were introduced shortly after basketball was invented. In 1895, the free throw line was officially placed fifteen feet (4.6 m) from the backboard, prior to which most gymnasiums placed one twenty feet (6.1 m) from the backboard. From 1924, players that received a foul were required to shoot their own free throws. One free throw shot is awarded to a player who was fouled while making a successful field goal attempt. If the field goal attempt is unsuccessful, two free throw shots are awarded (three if the player was attempting a three-point field goal). If an offensive player is fouled while not in the act of shooting, or if a player is fouled in a loose-ball situation, the penalty varies by level of play and the number of fouls accumulated by the opposing team in a given period.

• In NCAA and NFHS play:
  • If the player's team has 6 or fewer team fouls in the half, the team fouled gets possession of the ball.
  • If the team has 7 to 9 team fouls, the player fouled goes to the line for what is called "one-and-one" or the "bonus"—that is, if the player makes the first free throw, he gets the opportunity to attempt a second, but if he misses, the ball is live.
  • If the team has 10 or more fouls in the half, the player fouled gets two free throws, often called the "double bonus".
  • All overtime periods are considered an extension of the second half for purposes of accumulated fouls. Also, NFHS rules accumulate fouls per half, even though games are played in quarters.
• In the NBA:
  • If the player's team has 4 or fewer team fouls in the quarter, the team fouled gets possession of the ball.
  • Starting with the team's fifth foul in the quarter, the player fouled gets two free throws.
  • Overtime is not considered an extension of any quarter. Instead, the "penalty" of two free throws is triggered on the team's fourth foul in that overtime period (instead of the fifth).
  • Foul limits are reset in the last two minutes of a quarter or overtime period. If a team has not reached its limit of accumulated fouls, the first team foul in the last two minutes results in possession by the team fouled, and all subsequent fouls result in two free throws.
• In FIBA play:
  • If the player's team has 4 or fewer team fouls in the quarter, the team fouled gets possession of the ball.
  • Starting with the team's fifth foul in the quarter, the player fouled gets two free throws.
  • During an interval of play, all team members entitled to play are considered as players.
  • The ball become dead when an official blows his whistle while the ball is live
  • All overtime periods are considered an extension of the fourth quarter for purposes of accumulated fouls.

A player has 10 seconds to attempt a free throw. If the player does not attempt a free throw within 10 seconds of receiving the ball, the free throw attempt is lost, and a free throw violation is called. A free throw violation also occurs if a free throw misses the backboard, rim, and basket. If a free throw violation is assessed in the last free throw awarded to a player in a given situation, possession automatically reverts to the opposing team.
A charge is physical contact between an offensive player and a defensive player. In order to draw an offensive charge the defensive player must establish legal guarding positioning in the path of the offensive player. If contact is made, the officials would issue an offensive charge. No points will be allowed and the ball is turned over. The defensive player may not draw an offensive charge in the "restricted zone" (see below for more details).
Blocking is physical contact between the offensive player and the defensive player. Blocking fouls are issued when a defensive player interferes with the path of the offensive player in the shooting motion. Blocking fouls are easily called when the defensive player is standing in the "restricted zone".
Restricted zone: In 1997, the NBA introduced an arc of a 4-foot (1.22 m) radius around the basket, in which an offensive foul for charging could not be assessed. This was to prevent defensive players from attempting to draw an offensive foul on their opponents by standing underneath the basket. FIBA adopted this arc with a 1.25 m (4 ft 1.2 in) radius in 2010.

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Rules of Basketball

James Naismith published in 1891, his rules for the game of "Basket Ball" that he invented:The original game played under these rules was quite different than the one played today as there was no dribbling, dunking, three pointers, or shot clock, and goal tending was legal.

1. The ball may be thrown in any direction with one or both hands.
2. The ball may be batted in any direction with one or both hands.
3. A player cannot run with the ball. The player must throw it from the spot on which he catches it, allowance to be made for a man who catches the ball when running at a good speed if he tries to stop.
4. The ball must be held in or between the hands; the arms or body must not be used for holding it.
5. No shouldering, holding, striking, pushing, or tripping in any way of an opponent. The first infringement of this rule by any person shall count as a foul; the second shall disqualify him until the next basket is made or, if there was evident intent to injure the person, for the whole of the game. No substitution shall be allowed.
6. A foul is striking at the ball with the fist, violation of rules three and four and such described in rule five.
7. If either side makes three consecutive fouls, it shall count a goal for the opponents (consecutive means without the opponents in the mean time making a foul).
8. A goal shall be made when the ball is thrown or batted from the grounds into the basket and stays there (without falling), providing those defending the goal do not touch or disturb the goal. If the ball rests on the edges, and the opponent moves the basket, it shall count as a goal.
9. When the ball goes out of bounds, it shall be thrown into the field of play and played by the first person touching it. In case of dispute the umpire shall throw it straight into the field. The thrower-in is allowed five seconds. If he holds it longer, it shall go to the opponent. If any side persists in delaying the game, the umpire shall call a foul on that side.
10. The umpire shall be the judge of the men and shall note the fouls and notify the referee when three consecutive fouls have been made. He shall have power to disqualify people according to Rule 5.
11. The referee shall be judge of the ball and shall decide when the ball is in play, in bounds, to which side it belongs, and shall keep the time. He shall decide when a goal has been made and keep account of the baskets, with any other duties that are usually performed by a scorekeeper.
12. The time shall be two fifteen-minute halves, with five minutes rest between.
13. The side making the most points in that time is declared the winner.

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