[Igofastr]

When at the DMV, I was given a form to be filled out by an official inspection location (it was a brake shop).

They checked to make sure my brake lights worked and that I had a functioning backup light (I'd rigged one up using a switch from a motorcycle brake system that I attached to the shift mechanism of my car). I was afraid that they'ed use the brake check portion to go for a joy-ride in my GT40, but they said that fact that I was able to drive to their location was proof enough that my brakes worked.

They didn't ask for a third brake light.