How many rules are in rugby?

There are 22. These are;

1. Field of play

2. The ball

3. Players

4. Clothing

5. Time

6. Match officials

7. Basic play

8. Play on!

9. Points

10. Foul play

11. Offside and onside in general play

12. Knock on or throw forward

13. Kick off and restart kicks

14. Ball grounded - no tackle

15. The tackle

16. The ruck

17. The maul

18. The mark

19. Touch and lineout

20. The scrum

21. Penalty and free kicks

22. In-goal area, grounding