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.
A wing mast of more than 2m 2 in projected area counts as one sail, as well as any other wind propulsion system. See article I-11 for the sail number rule. The stability test is effected with the head of the mast at water level with full ballast on one side then on the other side. As a member of the Association you receive them free, otherwise you have to pay for them.