Brake inspection in NH is based on the mileage on the odometer. I believe that anything over 40K gets one of the front wheels pulled to inspect the calipers, pads and rotors.
Been in NH for 31 years (still not considered a native) and that's the way its been ever since we moved here. Used to be two inspections and registration renewals each year, but about 20 years ago they went to once per year.
If you're moving to NH or have just moved here be prepared for sticker shock on the registration.