In disc golf, the objective is to get your disc to the basket in the lowest amount of throws. This is accomplished by using different discs designed to have certain characteristics that make them better at certain distances.
Rules According to the PDGA
Unplayable Lie: Any disc that comes to rest above the ground is considered an unplayable lie. The disc must be thrown from the lie on the ground, directly underneath the unplayable lie, relocated to avoid damage to the vegetation.
Tee Throws: Each hole begins with a tee throw. Tee throws must be completed within or behind the designated tee area.
Fairway Throws: Fairway throws must be made from directly behind the lie. A run-up and normal follow-through, after release, is allowed, unless the lie is within 10 meters of the target. Any shot within 10 meters of the target requires that the player not move past the lie until the disc is at rest.
If someone breaks the rules, such as throwing out of bounds on a hole, other players that you're playing with will keep you honest. There isn't a set of sanctions that are placed on players if they break the rules unless they are playing in a professional environment.