There may be a comparison to be had with motorcycle legislation.
Many smaller bikes (in particular, mopeds) come to this country in a "restricted" form in order to comply with the relevant legislation controlling maximum power output. So, an Italian moped easily capable of 60mph is restricted (by various means) to, say, 31mph in the UK. Of course, many teenagers deliberately remove the, often simple, restrictions and, thereby, break the law. Many are punished for doing so. However, I have yet to hear of a manufacturer being brought to book as they merely supplied the bike in the properly restricted form. Might I suggest, therefore, that ebikes which are sold in a restricted form will be treated similarly? ie play around with the components or alter the settings if you must, but be aware of the consequences.