This 25 page booklet consists all the rules approved by the PDGA as of January 1, 2006. Below is the preface from the booklet:
The growing popularity of the game of disc golf begins with the essential fact that throwing a flying disc with power and accuracy is a marvelous sensation. The constant challenge, the social nature of the game, the good physical and mental conditioning, and the fact that it is inexpensive to play are also attractions. Disc golf is a recreational sport for everyone, regardless of age, gender, or ability.
The object of the game is to traverse a course from beginning to end in the fewest number of throws of the disc. Each consecutive throw is made from where the disc came to rest after the last throw. Score is determined by counting the number of throws made on each hole plus penalty throws and then summing all holes. The winner is the player who completes the course with the lowest score.
The course consists of a series of holes laid out so that when the player completes one hole he or she proceeds to the beginning of the next until all the holes have been played. The player is provided with a teeing area from which to begin each hole and a target to complete the hole.
Disc golf courses are normally laid out among wooded areas with diverse terrain to provide natural obstacles to the flight of the disc. These natural obstacles are very much a part of the game and must not be altered by the players in any way to decrease the difficulty of a hole. Disc golf courses are normally 18 holes in length, but there are also 9-hole, 22-hole, 24-hole and 27-hole courses in existence. Disc golf courses can be found in each of the 50 United States and in Canada, Japan, Australia, New Zealand, Denmark, Sweden, Norway, Netherlands, Switzerland, Germany, Finland, Hungary, United Kingdom, Peru, Belgium, Czech Republic, and Taiwan.
Disc golf is a game that expects high standards of etiquette and courtesy. Among the basic considerations of etiquette are such things as concern for spectators and other players and respect for plant life on the course. These rules have been designed to promote fair play for all disc golfers. In using these rules, players should apply the rule that most directly addresses the situation in question. If in doubt, players should consult an official.