FIFA Laws of the Game - The techinal definition of the game of soccer

1. Field, Equipment, Uniforms
2. Duties of the Referee and Assistant Referees
3. Starting and Restarting a Match
4. When is a Ball In-Play or Out-of-Play
5. Offside
6. Fouls and Misconducts
7. Free Kicks, Penalty Kicks, Throw-ins, Goal Kicks and Corner Kicks

There are many more useful documents for referees in the Links Section and the Document Section of this website.