Interesting, I found the doc
Here You referred too, and I think it's body style that counts.
Tricycles derived from four-wheeled bodies, such as saloon cars and quad bikes must meet the normal requirements above.
The word 'derived' is the sticky one, any lawyers here?
It would be an interesting argument, but I fear you could end up in court. But if that geology
Student can get off from stacking shelves from a badly written law, why shouldn't you!
Good luck, but take care......