(CNN) As Iraqi forces advance on ISIS strongholds, a sign discovered near Mosul reveals the extent of the militants' invasive control of populations they subjugated.
The sign found in the ancient restorative spa town of Hamman al-Alil just south of Mosul dictates precise details of men's underwear.
Not satisfied with banning tight jeans, T-shirts, shaving and forcing families under their control to wear baggy clothing more typical centuries ago, ISIS has printed pictures of what underwear is acceptable and what is not.
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The poster or sign shows a variety of shorts typical of thousands found in high streets throughout the world, from boxers to briefs.