Here is the entire 803.01 rule:
803.01 Obstacles And Relief
Last updated: Friday, August 29, 2014 - 15:02
Obstacles to a Stance or Throwing Motion: With the exception of casual obstacles to a stance as described below, a player is not allowed to move any obstacle on the course. No relief is granted from park equipment (such as signs, trash cans, or picnic tables), which is considered to be part of the course. A player is allowed to request that other people remove themselves and/or their belongings from the player's stance or line of play.
Casual Obstacles to a Stance: A player may obtain relief only from the following obstacles that are on or behind the lie: casual water, loose leaves or debris, broken branches no longer connected to a tree, motor vehicles, harmful insects or animals, players' equipment, people, or any item or area specifically designated by the Director before the round. To obtain relief, the player must remove the obstacle if it is practical to do so. If it is impractical to move the obstacle, the player's lie may be relocated to the nearest lie which is no closer to the target, is on the line of play, and is not more than five meters from the original lie (unless greater casual relief is announced by the Director).
Course equipment may always be restored to its proper working order, including the clearing of obstacles.
A player shall receive one penalty throw, without a warning, for violation of an obstacle or relief rule.
A player who purposely damages any part of the course shall receive two penalty throws, without a warning. The player may also be disqualified from the tournament, in accordance with Section 3.3 of the Competition Manual.