(1) The annual fee for registration of tractors, truck-tractors, or motor trucks except truck cranes, truck shovels, road oilers, bituminous distributors, and farm trucks used as specified in subsection (f) of this section shall be based on the total weight of the truck-tractor or motor truck, including body and cab plus the heaviest load to be carried. In computing the fees for registration of tractors, truck-tractors, or motor trucks with trailers or semi-trailers attached, except trailers or semi-trailers with a gross weight of less than 6,000 pounds, the fee shall be based upon the weight of the tractor, truck-tractor, or motor truck, the weight of the trailer or semi-trailer, and the weight of the heaviest load to be carried by the combined vehicles. In addition to the fee set out in the following schedule, the fee for vehicles weighing between 10,000 and 25,999 pounds inclusive shall be an additional $42.53, the fee for vehicles weighing between 26,000 and 39,999 pounds inclusive shall be an additional $85.03, the fee for vehicles weighing between 40,000 and 59,999 pounds inclusive shall be an additional $297.68, and the fee for vehicles 60,000 pounds and over shall be an additional $467.80. The fee shall be computed at the following rates per 1,000 pounds of weight determined pursuant to this subdivision and rounded up to the nearest whole dollar; the minimum fee for registering a tractor, truck-tractor, or motor truck to 6,000 pounds shall be the same as for the pleasure car type: $18.21 when the weight exceeds 6,000 pounds but does not exceed 8,000 pounds.
$20.83 when the weight exceeds 8,000 pounds but does not exceed 12,000 pounds.
$22.97 when the weight exceeds 12,000 pounds but does not exceed 16,000 pounds.
$24.56 when the weight exceeds 16,000 pounds but does not exceed 20,000 pounds.
$25.71 when the weight exceeds 20,000 pounds but does not exceed 30,000 pounds.
$26.26 when the weight exceeds 30,000 pounds but does not exceed 40,000 pounds.
$26.90 when the weight exceeds 40,000 pounds but does not exceed 50,000 pounds.
$27.13 when the weight exceeds 50,000 pounds but does not exceed 60,000 pounds.
$28.06 when the weight exceeds 60,000 pounds but does not exceed 70,000 pounds.
$29.00 when the weight exceeds 70,000 pounds but does not exceed 80,000 pounds.
$29.94 when the weight exceeds 80,000 pounds but does not exceed 90,000 pounds.