Maughan
Is the Tornado regeistered as an "X" boat . It should have an "X" on the stern for experimental and and ITA sail number or an ITA and a USA sail #
"X" boats are Tornado's that conform to all rules except materials. They are legal to race at a local level, they can only be raced at a national or international level with permission. The permission can range from "we would be happy to have you" to "stay out of everybody's way plus you will not be scored".
If the boat is not registered, contact the Tornado measurer. I think you just have to have the boat measured, fill out the forms and pay your fee.
There are some nasty features to the rules for light Tornado's though. To race, you must meet minimum weight, which means adding corrector weights. The corrector weight for the mast goes on top of the mast.
Good Luck