IJF SOR 18.104.22.168. Head defense, to ensure that judo has as little trauma as possible, if uke attempts voluntarily to use the head with any movement which is dangerous for the head, neck or spine, for defense and to avoid landing in / escaping from a score he shall be penalized with hansoku-make.
Special attention will be given to situations where tori attempts to throw his opponent during tachi-waza with, for example, seoi-otoshi, seoi-nage, sode-tsurikomi-goshi with the grip on both sleeves and koshi-guruma with both grips on the collar and uke makes an involuntary head defense.
These are examples and this situation can occur with other throwing techniques. In this situation there is no penalty for either tori or uke.