Section 7: Violations & Penalties

Law 9.1 defines foul play as any action by a player that is contrary to the Laws of the Game and includes, but is not limited to: Obstruction; Unfair play; Repeated infringements

Source: Law 9, Law 9.1, Law 21, Law 9.4, Law 9.8, Law 9.9, Law 9.10, Law 9.11, Law 9.12, Law 9.13, Law 9.14, Law 9.15, Law 9.16, Law 9.17, Law 9.18, Law 9.19, Law 9.20, Law 9.26, Law 9.27, Law 9.28

Send this to your friend — argument over.