The R&A - Working for Golf

Movable Obstructions

Movable obstructions (i.e. artificial movable objects such as rakes, bottles, etc.) located anywhere may be moved without penalty. If your ball moves as a result, it must be replaced without penalty.

If your ball is in or on a movable obstruction, the ball may be lifted, the obstruction removed and the ball dropped, without penalty, on the spot directly under where the ball lay on the obstruction, except that on the putting green, the ball is placed on that spot.

Moveable Obstructions