IJF SOR 18.2.2.1. To apply kawazu-gake (to throw the opponent by winding one leg around the opponent’s leg, while facing more or less in the same direction as the opponent and falling backwards into him).
Even if the thrower twists/turns during the throwing action, this should still be considered “kawazu-gake” and be penalized. Techniques such as o-soto-gari, o-uchi-gari, and uchi-mata where the foot/leg is entwined with opponent’s leg will be permitted and should be scored.