2. You Cannot Hit the Neck, Back, Kidney Areas, and Back of the Head
A player may have faced in the opposite direction from you, maybe after a punch. You are not allowed to hit them in the back when they are not in a position to defend themselves.
The neck and back of the head are directly connected to the spinal cord. You cannot hit in these areas as it may cause permanent damage that may lead to paralysis. Kidneys are also very vital organs in the body and may suffer physical injury from kicking the kidney area.