Rule 18-2b. Ball Moving After Address
A new Exception is added that exonerates the player from penalty if his ball moves after it has been addressed when it is known or virtually certain that he did not cause the ball to move. For example, if it is a gust of wind that moves the ball after it has been addressed, there is no penalty and the ball is played from its new position.
to return to New Rules 2012-2015.