Individual C.S.A. scores are based on your inspections, crashes, and compliance with the regs. Not much on the biennial update for the individual O/O or driver. The updates help with the averages of all motor carriers in different segments. Combination Vehicles / Tractor Trailers and Strait Trucks.
Unfortunately straight truck owners and drivers are plunged into the same category as local tow trucks and we all see plenty of rolling garbage towing vehicles. That is one reason the S/T segment has a lower than combo vehicles.
Also the local and regional vehicle and safety inspection data is also taken into consideration.
I fill out the form, fill in the actual mileage if any, pay them the cash and move on.