§13–923.

    (a)    When registered with the Administration, every truck tractor or similar motor vehicle used for propelling, supporting, or drawing a trailer or semitrailer is a Class F (tractor) vehicle.

    (b)    For each Class F (tractor) vehicle, the annual registration fee is based on the maximum gross weight of the vehicle in combination with a trailer or semitrailer, as follows:

     Maximum Gross Weight          Fee (per 1,000 Pounds
     Limit (in Pounds)               or Fraction Thereof)
     40,000 (minimum) – 60,000         $21.00
     60,001 – 80,000 or more          $22.50