The Laws of the Game apply to the seven-a-side game, subject to the following variations:

Law 3: Number of Players - The Team
Law 5 : Time
Law 6 : Match Officials
Law 9 : Method of Scoring
Law 10 : Foul Play
Law 13 : Kick-off and Restart Kicks
Law 20 : Scrum
Law 21 : Penalty and Free Kicks
 

To read more about the Laws of the Game of Seven-a-side please visit the World Rugby Passport Site on the Laws of the Game