Rule 9 – Section 1 – Article 2 – Striking Fouls and Tripping

a. No person subject to the rules shall strike an opponent with the knee; strike an opponent’s helmet (including the face mask), neck, face or any other part of the body with an extended forearm, elbow, locked hands, palm, fist, or the heel, back or side of the open hand; or gouge an opponent. (A.R. 9-1-2:I)
b. No person subject to the rules shall strike an opponent with his foot or any part of his leg that is below the knee.
c. There shall be no tripping. Tripping is intentionally using the lower leg or foot to obstruct an opponent below the knee (Rule 2-28).