California Code, Business and Professions Code - BPC § 18627

(a) “Martial arts” means any form of karate, kung fu, tae kwon do, kickboxing or any combination of full contact martial arts, including mixed martial arts, or self-defense conducted on a full contact basis where a weapon is not used.

(b) “Kickboxing” means any form of boxing in which blows are delivered with the hand and any part of the leg below the hip, including the foot.

(c) “Full contact” means the use of physical force in a martial arts contest that may result or is intended to result in physical harm to the opponent, including any contact that does not meet the definition of light contact or noncontact.

(d) “Light contact” means the use of controlled martial arts techniques whereby no contact to the face is permitted and no contact is permitted which may result or is intended to result in physical harm to the opponent.

(e) “Noncontact” means that no contact occurs between either contestant.