There was still a building fee to be paid to Rodney March last time I checked. If you want the boat measured, a receipt for the building fee is one of the first checkpoints.
A.9 INTERNATIONAL CLASS FEE AND ISAF PLAQUE
A.9.1 The licensed hull builder shall pay the International Class Fee, which shall be
3% of the builder's selling price (without VAT) for a standard Tornado without
sails, on every pair of hulls, or hull kit, built whether or not the boat is
subsequently measured and registered.
A.9.2 Half of the amount of the International Class Fee shall be paid on any single hull
built for replacement or other purpose.
A.9.3 The ITA shall, having received the International Class Fee, send two numbered
ISAF Building plaques and a measurement form to the licensed hull builder. The
plaques shall be permanently affixed to the hull transoms by the builder prior to
delivery to the owner.
A.9.4 An official International Class Fee receipt shall be issued to the builder by the
Association. These shall be numbered consecutively.
A.9.5 The International Class Fee receipt shall be delivered by the builder to the owner
on delivery of the hulls, or hull kit.
A quick check on Marstrom.com and it looks like a standard vanilla Tornado is EUR 23012,- 3% of that is still EUR 690 or ~ US$1084. Ouch!