rulefan
Tour Winner
I didn't know I could substitute a ball I was on the understanding only if a ball lost or badly damaged was only times during a hole it could be swapped
Whenever you can't get your hands on your ball you may substitute another BUT you can't simply change it for another unless it is unfit for play.
You will see that many rules use the expression a ball as opposed to the ball.
The former means any. The latter means the original.