The following acts constitute fouls in boxing:

1. (1) Hitting below the belt.
2. (2) Hitting an opponent who is down or is getting up after being down.
3. (3) Holding an opponent with one hand and hitting with the other.
4. (4) Holding or deliberately maintaining a clinch.
5. (5) Wrestling or kicking.
6. (6) If the referee has signaled that the opponent has been knocked out, striking an opponent who is helpless as a result of previous blows and so supported by the ropes that he or she does not fall.

1/27/17 (Mass. Register #1331)

1. (7) Butting with the head or shoulder or using the knee.
2. (8) Hitting with the open glove, the butt of the hand, the wrist or the elbow, and all backhand blows.
3. (9) Purposely going down without being hit.
4. (10) Striking deliberately at that part of the body over the kidneys.
5. (11) Deliberately using the rabbit punch.
6. (12) Jabbing the opponent’s eyes with the thumb of the glove.
7. (13) Using abusive language in the ring.
8. (14) Engaging in any unsportsmanlike trick or action which causes injury to an opponent.
9. (15) Hitting on the break.
10. (16) Hitting after the bell has sounded the end of the period of unarmed combat.
11. (17) Hitting an opponent whose head is between and outside of the ropes.
12. (18) Pushing an opponent about the ring or into the ropes.