(1) Each bus, heavy truck or truck tractor must be assigned an RC based on the manufacturer's rated gross vehicle weight for such bus or heavy truck or the manufacturer's rated gross combined weight for such truck tractor as prescribed in the database maintained by the department. The assignment must be based on the vehicle identification number, make, model and year for the bus, heavy truck or truck-tractor. If more than one manufacturer's rated gross vehicle weight or gross combined weight may be attributed to a particular bus, heavy truck or truck-tractor, the lowest RC will be assigned to that vehicle for purposes of inclusion in the database.
(2) For any bus, heavy truck or truck tractor for which a rated capacity cannot be electronically assigned from the department's database, the department shall assign a rated capacity equal to the declared weight of the vehicle as provided by the applicant at the time of original or subsequent registration or as recorded in the vehicle record maintained on the department's motor vehicle computer system.
(3) A trailer will be assigned a rated capacity equal to its declared weight.
(4) If a rated capacity has been assigned to a vehicle in accordance with (2) above, the rated capacity is subject to being replaced if, at a later time, the rated capacity as stated by the manufacturer is published or located or the department adopts a standard rated capacity for that vehicle, and the published or standard rated capacity is included in the department's database.