A player must choose the stance that will result in the least movement of any part of any obstacle that is a permanent or integral part of the course. Once a legal stance is taken, the player may not move an obstacle in any way in order to make room for a throwing motion. It is legal for a player's throwing motion to cause incidental movement of an obstacle.
When the disc is released, a player must:
Have at least one supporting point that is in contact with the lie; and,
Have no supporting point in contact with the marker disc or any object (including the playing surface) closer to the target than the rear edge of the marker disc; and,
Have all supporting points in-bounds.
Supporting point contact with or beyond the marker disc is permitted after the disc is released, except when putting.
Putting: Any throw from within 10 meters of the target, as measured from the rear of the marker disc to the base of the target, is a putt. Supporting point contact closer to the target than the rear edge of the marker disc after the disc has been released is a stance violation. The player must demonstrate full control of balance before advancing toward the target.
A player shall receive a warning for the first stance violation in the round. Subsequent stance violations in the same round shall incur a one-throw penalty. Stance violations may not be called or seconded by the thrower.
Any throw made from an illegal stance is disregarded. A re-throw must be taken from the original lie, prior to subsequent play by others in the group.
