Okla. Stat. tit. 68, § 68-711: Registration of vehicles - Use of liquefied gas from cargo

tank.

(a) Before any motor vehicle is operated on the public highways

of this state, the operation of which is subject to the tax levied

by subsection (b) of Section 3 of this act, and including the

vehicles of licensed dealers using special fuel, such motor vehicles

must be registered under this act with the Tax Commission as herein

provided. An application for registration of each motor vehicle

required to be registered must be on a form prescribed and furnished

by the Tax Commission showing the name, address and special fuel

user's or special fuel dealer's license number of the owner or

operator of such vehicle, a complete description of the motor

vehicle, including the make, model, year made, motor number, license

tag number, kind of special fuel used by such motor vehicle and such

other information as the Tax Commission may require.

(b) No vehicle used for the transportation of any liquefied gas,

including butane or propane, shall be allowed to use, for the

operation of said vehicle, gas directly from the cargo tank of said

vehicle or any trailer attached thereto; and any connection of a

fuel line between the motor of such vehicle and any tank other than

the regularly installed fuel tank of such vehicle, direct or

indirect, and any valve or outlet for such a connection, is hereby

prohibited.

(c) Upon approval of said application, the Tax Commission shall

register such vehicle and issue a nontransferable special fuel use

vehicle permit therefor bearing a distinctive number and showing

that the vehicle described is registered with the Commission by a

licensed special fuel dealer or user who has complied with the

provisions of this act. Such permits shall remain in force until

surrendered, suspended or canceled in the manner provided by law.

(d) Every person operating a motor vehicle on the highways of

this state as a special fuel dealer or a special fuel user must at

all times during such operation have displayed in the cab of such

motor vehicle a special fuel use vehicle permit which shall be

subject to inspection at all times by representatives of the Tax

Commission and peace officers.