As far as I am aware ILCA control the construction manual but, as with any change to the boat, all parties need to agree to any changes. If the plaque it specified in the manual (and a specimen drawing/picture supplied) in theory they cannot change it and keep boats 'class legal' without everyone agreeing.I asked about who controls the manual (i.e. who can say who can and can't use it) as it's one of the keys to building a class legal boat (ignoring the Laser trademark). I had thought Kirby had control, however IPLore seems to think it's now controlled by the ILCA. If so, that's an important part of ensuring the integrity of the class.
In practice however they have. Does anyone know what plaques the PSA built boats are using? I would guess the new ones by now.......