In addition to the license fees, registration fees, or any other taxes required by law to be collected from motor carriers subject to this chapter, each such motor carrier shall be subject to, and shall pay to the Public Service Commission, a special annual assessment for the purpose of paying the salaries, compensation, costs and expenses of administering and enforcing this chapter. All proceeds or funds derived from such assessment shall be paid into the State Treasury and credited to a special fund, designated Public Service Commission Motor Carrier Fund, to be appropriated as provided by law for the purposes herein stated. Each member of the commission shall receive a salary in the amount set forth in section three, article one, chapter twenty-four of this code as compensation for the administration of this chapter in addition to all other salary or compensation otherwise provided by law, to be paid from said fund at least twice per month. The special assessment against each motor carrier shall be apportioned upon the number and capacity of motor vehicles used by said carrier, computed as hereinafter provided.

1. (a) For each uniform identification card $ 3.00

2. (b) Upon each power unit of such carriers of property, in accordance with its capacity as rated by its manufacturer, in addition to amount of subdivision (a):

   of one ton or less capacity. $ 9.00

   of over one to one and one-half tons capacity 13.50

   of over one and one-half tons to two tons capacity 18.00

   of over two tons to three tons capacity 22.50

   of over three tons to four tons capacity 27.00

   of over four tons to five tons capacity 31.50

   of over five tons to six tons capacity 36.00

   of over six tons to seven tons capacity .40.50

   of over seven tons to eight tons capacity 45.00

   of over eight tons to nine tons capacity 49.50

   of over nine tons to ten tons capacity 54.00

   of over ten tons capacity, $54.00 plus $4.50 for each additional ton of capacity in

   excess of ten tons.

3. (c) Upon each trailer and semitrailer of such carriers of property, in accordance with its capacity as rated by its manufacturer, in an amount of two thirds of the amount provided for vehicles of its capacity in subdivision (b) of this section.

4. (d) Upon each power unit of such carriers of passengers, in accordance with the seating capacity thereof, in addition to amount in subdivision (a):

   of ten passengers or less $13.50

   of eleven to twenty passengers, inclusive 22.50

   of twenty-one to thirty passengers, inclusive 31.50

   of thirty-one to forty passengers, inclusive 45.00

   of over forty passengers 54.00

5. (e) The annual assessment of each motor carrier shall be paid on or before July 1 of each year. Additional assessments shall be collected upon the placing in use of any additional motor vehicle: Provided, That such additional assessments shall be subject to a reduction in the amounts shown in subdivisions (b), (c) and (d) of this section corresponding to the unexpired quarterly periods of the fiscal year, but shall not in any event be less than one fourth of such amount plus the sum of $3 provided in subdivision (a) of this section.
6. (f) Upon payment by any motor carrier of the assessment provided for, the Public Service Commission shall advise the Division of Motor Vehicles by notice in writing that such assessment has been paid, whereupon the Division of Motor Vehicles may issue motor vehicle license for the vehicles described in said notice.
7. (g) Prior to the beginning of any fiscal year the Public Service Commission, after taking into consideration any unexpended balance in the Motor Carrier Fund, the probable receipts to be received in the ensuing fiscal year, and the probable costs of administering and enforcing this chapter for the ensuing fiscal year, may fix the assessments provided for in this section for the ensuing fiscal year in amounts which, in the commission’s judgment, will produce sufficient revenue to administer and enforce this chapter for said fiscal year: Provided, That in no event shall such assessments exceed the amounts set up in this section.