Exception 2 to Rule 13-4 is amended to permit a player to smooth sand or soil in a hazard at any time, including before playing from that hazard, provided it is for the sole purpose of caring for the course and Rule 13-2 is not breached.
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.
Rule 19-1. Ball in Motion Deflected or Stopped; By Outside Agency
The note is expanded to prescribe the various outcomes when a ball in
motion has been deliberately deflected or stopped by an outside agency.
Rule 20-7c. Playing from Wrong Place; Stroke Play
Note 3 is amended so that if a player is to be penalized for playing from a
wrong place, in most cases the penalty will be limited to two strokes, even if
another Rule has been breached prior to his making the stroke.
to an explanation of these changes.