Basketball Shot Clock Operation

• The shot-clock operator uses a 30-second shot clock.
• The shot clock is used for the entire game, including overtime, unless the game clock has less time remaining than a shot-clock period.
• The shot-clock operator uses a separate timing device with a distinct horn.
• An alternate timing device should be available.

Starting the Shot Clock

• Start the shot clock when an inbounds player legally touches the ball after a throw-in is released.
• Start the shot clock when a team gains initial control after a jump ball or unsuccessful try for goal.
• Start the shot clock when there is a change in team control.

Stopping the Timing Device (No Reset)

• The timing device is stopped with no reset when a defensive player deflects the ball or causes it to go out of bounds.
• The timing device is stopped with no reset when a player is injured or loses a contact lens.
• The timing device is stopped with no reset when a charged or electronic-media time out has concluded.
• The timing device is stopped with no reset during team control when a defensive player causes a held ball and the alternating-possession arrow favors the offense, as defined by Rule 4-8.
• The timing device is stopped with no reset after double personal fouls, simultaneous personal fouls, or fouls with penalties of equal gravity when there is team control, unless the foul results in a change of team control.
• The timing device is stopped with no reset after an inadvertent whistle when there is team control as defined in Rule 4-8, or following an unsuccessful try that does not strike the ring or flange, and the alternating-possession arrow favors the shooting team.
• The timing device is stopped with no reset after any administrative technical foul(s) assessed to the team in control of the ball, or to the team entitled to the ball before it is at the disposal of the thrower-in, or to the bench personnel or followers of that team.
• The timing device is stopped with no reset after a simultaneous held ball as described in Rule 6-4.2 occurs during a throw-in, or after an unsuccessful try that does not contact the ring or flange and the alternating-possession arrow favors the shooting team.
• The timing device is stopped with no reset after the ball goes out of bounds and was last touched simultaneously by two opponents are either inbounds or out of bounds, or when there is doubt as to who last touched the ball. In this case, the throw-in team retains the unexpired time on the shot clock to attempt a try.

Resetting to 30 Seconds

• Reset to 30 seconds when there is a change in team control.
• Reset to 30 seconds when team control is reestablished in the backcourt after the team loses control. The mere touching of the ball by an opponent does not start a new shot-clock period when the same team remains in control during loose-ball situations.
• Reset to 30 seconds when a held ball or inadvertent whistle occurs with no team control, and the alternating-possession arrow favors the defense or nonshooting team.
• Reset to 30 seconds when a try for goal strikes the ring or flange, and the non-shooting team is first to gain control.
• Reset to 30 seconds when a single personal foul is committed by the defense/nonshooting team in the offense/shooting team’s backcourt.
• Reset to 30 seconds when an administrative technical foul is assessed to the defensive team or when neither team is in control.
• Reset to 30 seconds when a single player/substitute or bench technical foul, a single intentional foul, or a single disqualifying foul is committed.
• Reset to 30 seconds when fouls are committed by opposing players, and one of the fouls is intentional or disqualifying.
• Reset to 30 seconds when a violation occurs, except as in Rules 2-11.6.a.1, 2-11.6.c.2, and 2-11.6.d.5
• Reset to 30 seconds when an inadvertent whistle occurs when there was no player or team control at the time of the whistle in the shooting team’s backcourt following a try that strikes the ring or flange, and the alternating-possession arrow favors the shooting team.

Resetting to 20 Seconds (or Time Remaining, Whichever is Greater)

• Reset to 20 seconds (or the time remaining, whichever is greater) when a single personal foul is committed by the defensive team in the offensive team’s frontcourt during team control before the bonus is in effect.
• Reset to 20 seconds (or the time remaining, whichever is greater) when a violation of Rule 9-6 is committed by the defense during team control or by the non-shooting team following an unsuccessful try that does not contact the ring or flange.
• Reset to 20 seconds (or the time remaining, whichever is greater) when a foul is committed by the non-shooting team in the shooting team's frontcourt during an unsuccessful field-goal attempt that does not strike the ring or flange but is not committed against a player in the act of shooting or an airborne shooter before the bonus is in effect.

Resetting to 20 Seconds

• Reset to 20 seconds when the shooting team first gains control in their frontcourt after an unsuccessful field-goal or free-throw attempt that contacts the ring or flange and remains live.
• Reset to 20 seconds when in the shooting team’s frontcourt a personal foul is committed by the non-shooting team before the bonus is in effect after an unsuccessful field-goal or free-throw attempt that contacts the ring or flange and remains live, or during a successful field-goal or free-throw attempt and until the ball becomes live but is not committed against a player in the act of shooting or an airborne shooter.
• Reset to 20 seconds when the shooting team is awarded a throw-in after the ball goes out of bounds in its frontcourt following an unsuccessful field-goal or free-throw attempt that contacts the ring or flange and remains live.
• Reset to 20 seconds when the shooting team is awarded a throw-in after a simultaneous held ball or inadvertent whistle in its frontcourt when the alternating-possession arrow favors the shooting team following an unsuccessful field-goal or free-throw attempt that contacts the ring or flange and remains live.
• Reset to 20 seconds when the non-shooting team commits a violation of Rule 9-6 in the shooting team’s frontcourt following an unsuccessful field-goal or free-throw attempt that contacts the ring or flange and remains live.