Lost ball - Ball known or virtually certain to be in a penalty area
If your ball has not been found and it is known or virtually certain that it came to rest in a penalty area you may take penalty relief under Rule 17.1d. You have the relief options shown in Diagram #1 17.1d (relief for yellow penalty area) and Diagram #2 17.1d (relief for red penalty area), each for one penalty stroke. But if it is not known or virtually certain that your ball came to rest in a penalty area and the ball is lost, you must take stroke-and-distance relief.