161 Rule 18 18.2b What to Do When Ball Is Lost or Out of Bounds If a ball is lost or out of bounds, the player must take stroke-and-distance relief by adding one penalty stroke and playing the original ball or another ball from where the previous stroke was made (see Rule 14.6). Exception – Player May Substitute Another Ball Under Other Rule When It Is Known or Virtually Certain What Happened to Ball: Instead of taking stroke-and-distance relief, the player may substitute another ball as allowed under a Rule that applies when their ball has not been found and it is known or virtually certain that the ball: • Came to rest on the course and was moved by an outside influence (see Rule 9.6) or played as a wrong ball by another player (see Rule 6.3c(2)), • Came to rest on the course in or on a movable obstruction (see Rule 15.2b) or an abnormal course condition (see Rule 16.1e), A ball is out of bounds only when all of it is outside the boundary edge of the course. The diagrams provide examples of when a ball is in bounds and out of bounds. Out of bounds Out of bounds Course Course Ball in bounds Ball out of bounds DIAGRAM 18.2a: WHEN BALL IS OUT OF BOUNDS The boundary edge is defined by the line between the course-side points of the stakes at ground level, and the stakes are out of bounds. The boundary edge is the course-side edge of the line, and the line itself is out of bounds.
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