Rule 12: Bunkers
Loose Impediments and Movable Obstructions in Bunkers
May I remove a loose natural object (loose impediment) in a bunker? What about an artificial object?
A loose natural object is a loose impediment and may be removed anywhere on the golf course (see Rule 12.2a). But, you’ll want to be careful that your ball does not move if you move a loose impediment or you will get one penalty stroke and must replace your ball. An artificial object is an obstruction. If it’s movable, it may be moved anywhere on the course, including in bunkers and penalty areas (these may include the rake, a can, towel, etc.)
Remember the Rules Matter!