Antique car insurance?
I understand they want you to not drive, but really, how will they know? Give me a break. I think they're asking you to sign so you won't turn your classic into a daily driver, but really, how many of us will? I might bring mine to work on a sunny day in the summer, but they'll never know. As for the mileage, 30 seconds with a pair of pliers, and my speedo is disconnected. Zip tie it up out of the way. You're done.