1. Special fuel delivered into the supply tanks of or used by motor vehicles owned by the United States of America. Provided this exemption shall not apply to supply tank deliveries in Oklahoma unless the special fuel dealer demands and receives of the purchaser an exemption certificate of the kind and type prescribed and furnished by the Comptroller General of the United States, and such certificates shall be presented to the Tax Commission in lieu of the tax only by the special fuel dealer handling and delivering such special fuel;

2. Special fuel delivered into the supply tanks of farm tractors and stationary engines owned and operated by the purchaser of such special fuel and used exclusively for agricultural purposes as such purposes and uses are defined and enumerated in paragraph 2 of Section 500.3 of this title;

3. Special fuel imported into Oklahoma in the fuel supply tanks of motor vehicles commonly known and designated as automobiles, as distinguished from truck-type vehicles, which are constructed for, and being used solely for, the transportation of persons for purposes other than for hire or compensation and provided that the aggregate capacity of the fuel supply tank or tanks of any such vehicle shall not exceed thirty (30) gallons;

4. Special fuel imported into Oklahoma in the fuel supply tank or tanks of a motor vehicle when said supply tank or tanks and any additional containers have an aggregate capacity of not more than twenty-five (25) gallons and if such motor vehicle is not being used as a common carrier of persons or property, a contract carrier of persons or property, or as a private commercial carrier of property;

5. Special fuel imported into Oklahoma in the fuel supply tanks of motor vehicles and used on the highways of this state in importing or exporting livestock and farm products in the raw state, including cotton, whether in the seed or ginned, and including cottonseed and baled hay, when such commodities are moved from farm to market, or from market to farm on a vehicle or on vehicles owned and operated by a bona fide farmer not engaged in motor vehicle transportation for hire or compensation;

6. Special fuel used exclusively in road machinery and equipment built for and being used on location in the construction, repair or maintenance of public highways, roads and bridges by road contractors and by counties, cities and towns of this state, provided, however, this exemption shall not apply to automobiles nor to truck-type vehicles such as dump trucks, flatbed trucks and pickup trucks;

7. Special fuel used exclusively in passenger motor buses or coaches, having a seating capacity of ten or more persons, when such fuel is purchased by and used exclusively in public transit systems operated by any county, city, or town of this state, or by any public trust created under the laws of this state of which a county, city, or town of this state is the sole beneficiary thereof. Provided this exemption shall be allowed only when supported by a certificate executed by such city or trust on forms prescribed and furnished by the Tax Commission;

8. Special fuel purchased by any county, city or town for use as fuel to propel motor vehicles on the public roads and highways of this state, when said vehicles are being operated for the sole benefit of said county, city or town; provided that if the special fuel is placed directly into the fuel supply tank or tanks of the motor vehicle by the supplier, an exemption certificate must be furnished to the supplier on forms prescribed and furnished by the Tax Commission;

9. Special fuel purchased by any Oklahoma school district for use as fuel to propel motor vehicles on the public roads and highways of this state, when the vehicles are being operated for the sole benefit of the school district, provided that if the special fuel is placed directly into the fuel supply tank or tanks of the motor vehicle by the supplier, an exemption certificate must be furnished to the supplier on forms prescribed and furnished by the Tax Commission; and

10. Motor fuels purchased by the Oklahoma Department of Transportation for use as fuel to propel motor vehicles on the public roads and highways of this state, when the vehicles are being operated for the sole benefit of the Department of Transportation.