Golf is open to all
Where a caddie may stand before you make a stroke
When you begin taking a stance for your stroke (which means you have at least one foot in position for that stance) and until your stroke is made, there are limitations relating to when and why your caddie may deliberately stand on or close to an extension of the line of play behind the ball (that is, the “restricted area”).
Follow the link below for full details of when and why your caddie may deliberately stand in the restricted area.
This Rule does not prohibit you from getting help by having a person other than your caddie (or your partner) stand in the restricted area to help track the flight of a ball.