It goes without saying that this would be irrelevant if the father or grandfather were already dead; however, this provision stipulates that if the son or grandson avenged his father or grandfather while his father or grandfather was still alive, his father or grandfather would also be punished for being guilty by association.
父祖が死亡している場合はもとより無関係であるが、父祖が存命中に子孫が父祖のために敵討をすれば、父祖も連座で罰せられるとの規定である。