The class rules state:
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[3]d. Bona tide amateur builders shall be permitted to build
not more than one boat a year, and this boat shall be
for their own use.
[...]
[5]b. Templates used for official measurement or
re-measurement shall be issued by the ISAF.
[...]
Official Plans
The set comprises:
1b Construction details (1 May 1968 amended 19 September
1968 and September 1975).
2b Panel offsets and deck jig (2 April 1968 amended 27
February 1968 and September 1975).
3b Details of fittings (10 March 1968 amended 19 September
1968 and September 1975).
4a Bulkheads, rudder, and daggerboard (4 April 1968).
5a Sail shape (7 May 1968 amended September 1975).
6a Details of stitch and glue (15 April 1968 amended
September 1975).
Official Templates
The set comprises:
Bow template 0, 1, 2, 3.3, 4.2 and 5 hull templates
Centreboard template
Rudder template
Deck camber template
ISAF Limited, Effective: 4th April 2002
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However, the measurement form states:
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The templates shall be those obtained through the National Authority.
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So, it looks like amateur building is allowed, but you'd need to contact either
info@sailing.org or your local national authority. I'd start by contacting the recognized Tornado measurer closest to you, whose contact info is available at
www.tornado.org, since they at least know how to get the templates. I would expect that you'll have to pay a fee to copy the plans and templates, and you might have to pursuade the powers that be that the rules allow amateur builders to have a copy of the plans.
