49.1 Competitors shall use no device designed to position their bodies outboard, other than hiking straps and stiffeners worn under the thighs.

49.2 When lifelines are required by the class rules or the sailing instructions they shall be taut, and competitors shall not position any part of their torsos outside them, except briefly to perform a necessary task. On boats equipped with upper and lower lifelines of wire, a competitor sitting on the deck facing outboard with his waist inside the lower lifeline may have the upper part of his body outside the upper lifeline.