When a player’s ball lies in a part of the general area cut to fairway height or less the ball must be lifted, placed on and played from an Astroturf, or similar type of, mat. The ONLY exception is if you decide to use a putter.
The mat must be placed as near as possible to where the ball originally lay, and the ball must be placed on the mat.
The ball may be cleaned when lifted. If a ball when placed rolls off the mat, the player must try to place it a second time. If the ball again does not stay on the mat, the mat must be moved to the nearest spot, not nearer the hole, where the ball will come to rest on the mat when placed.
If the player accidentally causes the ball on the mat to move before a stroke is made, there is no penalty and the ball must be placed again on the mat.
If a tee is used to secure the mat into the ground, the ball must not be placed on the tee.