During the Aes Sedai interrogation of Semirhage, they are chronically frustrated by Rand's prohibition against physical violence as a form of torture. Eventually:
Cadsuane breaks the forsaken by spanking her and forcing her to eat food off the floor
Spanking hardly counts as torture. The pain is negligible, and Cadsuane even acknowledges pain would have no effect on breaking Semirhage. But in the end she still does actually use pain as part of her interrogation techniques. Did she break Rand's prohibition in doing so?