(a) Except as provided in section 14-24, a commercial truck-tractor shall be registered separately by gross vehicle weight. Such gross vehicle weight shall include the light weight of the truck-tractor plus the light weight of the heaviest semitrailer used in combination with such truck-tractor together with its payload when in operation on the highway. The fee for the registration of each such truck-tractor shall be in accordance with section 14-47.

      (b) No person shall register a commercial truck-tractor specifying a gross vehicle weight which exceeds the gross weight established by the manufacturer for such vehicle unless such vehicle has been modified to carry greater weight by such person for use in connection with his business and has been inspected by the commissioner for the greater gross vehicle weight prior to registration. Any person who violates any provision of this subsection shall be deemed to have committed an infraction. The Commissioner of Motor Vehicles shall also revoke the motor vehicle registration of such vehicle. After inspection of such vehicle and upon receipt of the restoration fee as provided in subsection (b) of section 14-50b, the commissioner may issue to such person a new registration which shall indicate the actual gross weight of such vehicle.