9.11.(a) Players must not do anything that is reckless or dangerous to others including leading with the head, shoulder, elbow or forearm, or jumping into, or over an opponent.

9.11.(b) Ball-carriers must not lower their height significantly before making contact with an opponent in open play.

9.12. A player must not physically or verbally abuse anyone. Physical abuse includes, but is not limited to, biting, punching, contact with the eye or eye area, striking with any part of the arm, head, shoulder, forearm or knee(s), stamping, trampling, tripping or kicking.

9.13. A player must not tackle or attempt to tackle an opponent early, late or dangerously. Dangerous tackling includes, but is not limited to, tackling or attempting to tackle an opponent in open play above the base of the sternum even if the tackle starts below the base of the sternum.

Roadmap
Tackler Responsibilities
Ball Carrier Responsibilities
Further Detail