Rule 24. Obstructions
Definition
An 'obstruction' is anything artificial including the artificial surfaces and sides of roads and paths and manufactured ice, except:
a. Objects defining out of bounds, such as walls, fences, stakes and railings;
b. Any part of an immovable artificial object which is out of bound; and
c. Any construction declared by the Committee to be an integral part of the course.
24-1. Movable Obstruction
A player may obtain relief from a movable obstruction as follows:
a. If the ball does not lie in or on the obstruction, the obstruction may be that the movement of the ball is directly attributable to the removal of the obstruction. Otherwise, Rule 18-2a applies.
b. If the ball lies in or on the obstruction, the ball may be lifted, without penalty, and the obstruction removed. The ball shall through the green or in a hazard be dropped, or on the putting green be placed, as near as possible to the spot directly under the place where the ball lay in or on the obstruction, but not nearer the hole.
The ball may be cleaned when lifted for relief under Rule 24-1.
When a ball is in motion, an obstruction which might influence the movement of the ball, other than an attended flagstick or equipment of the players, shall not be removed.
24-2. Immovable Obstruction
a. Interference
Interference by an immovable obstruction occurs when a ball lies in or on the obstruction, or so close to the obstruction that the obstruction interferes with the player's stance or the area of his intended swing. If the player's ball lies on the putting green, interference also occurs if an immovable obstruction on the putting green intervenes on his line of putt. Otherwise, intervention on the line of play is not, of itself, interference under this Rule
b. Relief
Except when a ball lies in or touches a water hazard or a lateral water hazard, a player may obtain relief from interference by an immovable obstruction, without penalty, as follows:
(i) Through the Green: If the ball lies through the green, the point on the course nearest to where the ball lies shall be determined (without crossing over, through or under the obstruction) which (a) is not nearer the hole, (b) avoids interference (as defined) and (c) in not in a hazard or on a putting green. The player shall lift the ball and drop it within one club-length of the point thus determined on ground which fulfills (a), (b) and (c) above.
Note:
The prohibition against crossing over, through or under the obstruction does not apply to the artificial surfaces and sides of roads and path or when the ball lies in or on the obstruction.
(ii) In a Bunker: If the ball lies in or touches a bunker, the player shall lift and drop the ball in accordance with Clause (i) above, except that the ball must be dropped in the bunker.
(iii) On the Putting Green: If the ball lies on the putting green, the player shall lift the ball and place it in the nearest position to where it lay which affords relief from interference, but not nearer the nearest position to where it lay which affords relief from interference, but not nearer the hole nor in a hazard.
The ball may be cleaned when lifted under Rule 24-2b.
(Ball rolling to a position when there is interference by the condition from which relief was taken - see Rule 20-2c(v).)
Exception:
A player may not obtain relief under Rule 24-2b if (a) it is clearly unreasonable for him to play a stroke because of interference by anything other than an immovable obstruction or (b) interference by an immovable obstruction would occur only through use of an unnecessarily abnormal stance, swing or direction of play.
Note:
If a ball lies in or touches a water hazard or a lateral water hazard, if there is reasonable evidence that a ball is lost in an immovable obstruction, the player may, without penalty, substitute another ball and follow the procedure prescribed in Rule 24-2b. For the purpose of applying this Rule, the ball shall be deemed to lie at the spot where it entered the obstruction. If the ball is lost in an underground drainpipe or culvert the entrance to which is in a hazard, a ball must be dropped in that hazard or the player may proceed under Rule 26-1, if applicable.
PENALTY FOR BREACH OF RULE:
Match play - Loose of hole; Stroke play - Two strokes