(a) For the registration of each passenger motor vehicle, other than an electric motor vehicle, the fee shall be seventy-five dollars every two years, provided any individual who is sixty-five years of age or older on or after January 1, 1981, may, at his discretion, renew the registration of such passenger motor vehicle owned by him for either a one-year or two-year period. The fee for one year shall be thirty-eight dollars, and the fee for two years shall be seventy-five dollars; provided the biennial fee for any motor vehicle for which special license plates have been issued under the provisions of section 14-20 shall be seventy-five dollars. The provisions of this subsection relative to the biennial fee charged for the registration of each antique, rare or special interest motor vehicle for which special license plates have been issued under section 14-20 shall not apply to an antique fire apparatus or transit bus owned by a nonprofit organization and maintained primarily for use in parades, exhibitions or other public events but not for purposes of general transportation.

      (b) (1) For the registration of each motorcycle, the biennial fee shall be forty dollars, subject to the provisions of subdivision (2) of this subsection. For the registration of each motorcycle with side car or box attached used for commercial purposes, the biennial fee shall be fifty-six dollars. The commissioner may register a motorcycle with a side car under one registration which shall cover the use of such motorcycle with or without such side car. (2) Four dollars of the total fee with respect to the registration of each motorcycle shall, when entered upon the records of the Special Transportation Fund, be deemed to be appropriated to the Department of Transportation for purposes of continuing the program of motorcycle rider education formerly funded under the federal Highway Safety Act of 1978, 23 USC 402.

      (c) For the registration of each taxicab or motor vehicle in livery service, with a seating capacity of seven or less, the commissioner shall charge a biennial fee of two hundred fifty dollars. When the seating capacity of such motor vehicle is more than seven, there shall be added to the amount herein provided the sum of four dollars for each seat so in excess.

      (d) For the registration of each motor bus, except a motor bus owned and operated by a multiple-state passenger carrier as hereinafter defined, the commissioner shall charge a fee of forty-seven dollars and such registration shall be sufficient for all types of operation under this chapter. On and after July 1, 1992, the fee shall be fifty-three dollars. For the registration of motor buses owned or operated by a multiple-state passenger carrier, the commissioner shall charge registration fees based on the rate of one dollar per hundredweight of the gross weight, such gross weight to be computed by adding the light weight of the vehicle fully equipped for service to one hundred fifty pounds per passenger for the rated seating capacity, plus the sum of thirty-four dollars, and on and after July 1, 1992, one dollar and twenty-five cents plus the sum of thirty-nine dollars. The fee in each case shall be determined on an apportionment basis commensurate with the use of the highways of this state as herein provided. The commissioner shall require the registration of that percentage of the motor buses of such multiple-state passenger carrier operating into or through the state which the mileage of such motor buses actually operated in the state bears to the total mileage of all such motor buses operated both within and without the state. Such percentage figures shall be the mileage factor. In computing the registration fees on the number of such motor buses which are allocated to the state for registration purposes under the foregoing formula, the commissioner shall first compute the amount that the registration fees would be if all such motor buses were in fact subject to registration in the state, and then apply to such amount the mileage factor above referred to, provided, if the foregoing formula or method of allocation results in apportioning a lesser or greater number of motor buses or amount of registration fees to the state than the state under all of the facts is fairly entitled to, then a formula that will fairly apportion such registration fees to the state shall be determined and used by the commissioner. Said mileage factor shall be computed prior to March first of each year by using the mileage records of operations of such motor buses operating both within and without the state for the twelve-month period, or portion thereof, ending on August thirty-first next preceding the commencement of the registration year for which registration is sought. If there were no operations in the state during any part of such preceding twelve-month period, the commissioner shall proceed under the provisions of subsection (a) of article IV of section 14-365. In apportioning the number of motor buses to be registered in the state, as provided herein, any fractional part of a motor bus shall be treated as a whole motor bus and shall be registered and licensed as such. Any motor bus operated both within and without the state which is not required to be registered in the state under the provisions of this section shall nevertheless be identified as a part of the fleet of the multiple-state passenger carrier and the commissioner shall adopt an appropriate method of identification of such motor buses owned and operated by such carrier. The identification of all such motor buses by the commissioner as above required shall be considered the same as the registration of such motor buses under this chapter. The substitution from time to time of one motor bus for another by a multiple-state passenger carrier shall not require registration thereof in the state as long as the substitution does not increase the aggregate number of motor buses employed in the operation of such carrier, provided all such motor buses substituted for others shall be immediately reported to and identification issued for the same by the commissioner and, if a registration fee is required to be paid for such substituted motor bus, the same shall be promptly paid. As used in this subsection, the phrase “multiple-state passenger carrier” means and includes any person, firm or corporation authorized by the Interstate Commerce Commission or its successor agency to engage in the business of the transportation of passengers for hire by motor buses, both within and without the state.

      (e) (1) For the registration of a passenger motor vehicle used in part for commercial purposes, except any pick-up truck having a gross vehicle weight rating of less than twelve thousand five hundred pounds, the commissioner shall charge a biennial fee of eighty-three dollars and shall issue combination registration to such vehicle. (2) For the registration of a school bus, the commissioner shall charge an annual fee of one hundred dollars for a type I school bus and sixty dollars for a type II school bus. (3) For the registration of a motor vehicle when used in part for commercial purposes and as a passenger motor vehicle or of a motor vehicle having a seating capacity greater than ten and not used for the conveyance of passengers for hire, the commissioner shall charge a biennial fee for gross weight as for commercial registration, as outlined in section 14-47, plus the sum of thirteen dollars and shall issue combination registration to such vehicle. (4) Each vehicle registered as combination shall be issued a number plate bearing the word “combination”. No vehicle registered as combination may have a gross vehicle weight rating in excess of twelve thousand five hundred pounds. (5) For the registration of a pick-up truck having a gross vehicle weight rating of less than twelve thousand five hundred pounds that is not used in part for commercial purposes, the commissioner shall charge a biennial