Under Rule 13.1d, there will no longer be a penalty if a player (or opponent) accidentally causes the player’s ball to move on the putting green.
Also under Rule 13.1d, the procedure for when a ball on the putting green is moved by wind, water or other natural forces is revised, so that it must sometimes be replaced and sometimes be played from its new spot:
The shape, slope and condition of many putting greens today increase the chances that a ball at rest on the putting green might move, and it can be difficult to determine whether a player caused the ball to move or whether the ball was moved by wind or other natural causes.
When a ball moves while the player is doing nothing more than taking normal actions to prepare for a stroke, it can seem unfair for the player to be penalised.
Most “ball moved” situations occur on the putting green, involve minimal movement of the ball, frequently occur when the player is taking reasonable actions to prepare for a stroke and the ball can be easily replaced.
These considerations are not the same when the ball lies off the putting green, and so the penalty will continue to apply (with exceptions, such as accidentally moving a ball during search) to a player or opponent in those circumstances to reinforce the principle that the ball should be played as it lies and that players should continue to exercise care when near to a ball in play.
When a ball at rest is moved by natural forces such as the wind, it is normally played as it lies because its movement is considered a continuation of the previous stroke, as no person or object has affected where the ball lies.
But when the moved ball had already been lifted and replaced, the connection to the previous stroke is no longer obvious.
This is especially true on the putting green, where a player is allowed to mark, lift and replace a ball for any reason and many players do so as a matter of course.
When a ball on the green moves after having come to rest:
This Rule change may also be helpful in conditions of very high wind on the course, as it may allow play to continue in conditions where it might otherwise not be possible or fair because too many balls are being blown from their spot on the green.
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