LAWS OF THE GAME
The rules of soccer is governed over by the International Football Association Board (IFAB). A large number of football associations, including FIFA and AYSO, abide by the rules set forth by the IFAB. There are some, such as U.S. High School sports, College, and many other associations, who do not necessarily follow the rules set by IFAB as closely as others, if at all.
The following link will take you to the full listing of soccer rules
IFAB Laws of the Game.