Where I am, if you let
any premium lapse, ins. companies are 'required' to
cancel ALL insurance that you have. I once had an apartment with renter's insurance. After I moved (which they knew), I neglected to formally end the policy, I just let it run out. The next thing I knew, I had a certified letter in the mail informaing me that they had seen fit to cancel the insurance on all my cars. This meant that my registrations were also invalid. Seems a bit harsh. I'm sure they paid off the right officials to get that travesty on the books.
F'ing beaurocrats.