That may well be the case, but until there is clarity from the insurers about what constitutes a "modification" about which they want to know, how is the ordinary motorist to know what to do?Things are not so easy as that. If you are in possession of a complete list of all regular production options that were applied during the build of your car you will find that it contains a whole host of items that you may have considerd as standard but which, as far as the manufacturer is concerned, are actually regular production options, but they are mandatory.
The complete list for my BMW is a two page build schedule of RPO's, including items such as 6-way power seats with memory function, sat nav, air conditioning, even the type of surface finish of the interior brightwork (brushed aluminium),
That is why I have suggested listing any options the purchaser has opted for as a starting point. We should be able to assume the insurers have the means based on the vehicles VIN number to be able to establish what the "Standard" model is.