50.1

The timer shall be provided with a game clock and a stopwatch and shall:

  • Measure playing time, time-outs and intervals of play.
  • Ensure that the game clock signal sounds very loudly and automatically at the end of a quarter or overtime.
  • Use any means possible to notify the referees immediately if the signal fails to sound or is not heard.
  • Indicate the number of fouls committed by each player by raising the player foul marker in a manner visible to both head coaches.
  • Indicate that a player or a coach has been game disqualified, by raising the GD marker.
  • Notify a referee immediately when 5 fouls have been charged against any player.
  • Operate the team foul markers, each one positioned on either side of the scorer’s table nearest to the team bench. The team foul marker shall show the current number of team fouls and shall be fully in red, with no number visible, after the ball becomes live again after the fourth team foul in a quarter.
  • Effect substitutions.
  • Effect time-outs. The timer must notify the referees of the time-out opportunity when a team has requested a time-out.
  • Sound the signal only when the ball becomes dead and before the ball becomes live again. The sound of the timer’s signal neither stops the game clock or the game nor causes the ball to become dead.

50.2

The timer shall measure playing time as follows:

  • Start the game clock when: After an unsuccessful last free throw and the ball continues to be live, the court.
    • During a jump ball, the ball is legally tapped by a jumper.
    • ball touches or is touched by any player on the court.
    • During a throw-in, the ball touches or is legally touched by any player on the
  • Stop the game clock when: Time expires at the end of a quarter and overtime, if not stopped automatifourth quarter and in each overtime. referee calls a violation.
    • cally by the game clock itself.
    • A referee blows the whistle while the ball is live.
    • A goal is scored against a team which has requested a time-out.
    • A goal is scored when the game clock shows 2:00 minutes or less in the
    • The shot clock signal sounds while a team is in control of the ball.
    • The shot clock signal sounds while a team is in control of the ball and a

50.3

The timer shall measure a time-out as follows:

  • Start the stopwatch immediately when the referee blows the whistle and gives the time-out signal.
  • Sound the signal when 50 seconds of the time-out have elapsed.
  • Sound the signal when the time-out has ended.

50.4

The timer shall measure an interval of play as follows:

  • Start the stopwatch immediately when a previous quarter or overtime has ended.
  • Notify the referees before the first and third quarter when 3 minutes and 1.5 minutes remain until the start of the quarter.
  • Sound the signal before the second and fourth quarter and each overtime when 30 seconds remain until the start of the quarter or overtime.
  • Sound the signal and simultaneously stop the stopwatch immediately when an interval of play has ended.