Windows allowed, maximum 400 square inches . Sail shall be fastened to the boom so that no part of the foot of the sail will be more than three inches from the boom at any time during racing. No loose footed sails. All sails will display numbers. New numbers will be assigned to new boats and old ones without numbers will also receive numbers.
Old boats can retain their original number.
All measurements and weights under this certificate will be maintained by the boat owner and can be measured anytime a question arises.