The cockpit floor must be 15 cm minimum above the waterline. The total volume of water ballast must not exceed 400 litres symmetrically displaced along the longitudinal axis of the boat. Their use must not compromise the ability of the boat to right itself. The vents for each ballast must be located on the deck and have a minimum inside diameter of 25 millimetres. Each vent must have a cap.
Titanium is forbidden, Carbon is forbidden in the masts.
A tolerance of 30 mm is allowed. Tapering is allowed above the upper spreader. If mast area is more then 2.2 m 2 then it counts as a sail. No carbon allowed in the mast. Titanium is forbidden.