Okla. Admin. Code § 710:95-5-2
The following words and terms, when used in this Chapter, shall have the following meaning, unless the context clearly indicates otherwise:
"Automobile" means every motor vehicle of the type constructed and used for the transportation of ten persons or less, including the driver, or used for the transportation of property. Provided, however, that the automobile's gross vehicle weight rating does not exceed sixteen thousand (16,000) pounds.
"Commission" means the Oklahoma Tax Commission.
"DEQ" means the Oklahoma Department of Environmental Quality.
"ODH" means the Oklahoma Department of Health.
"Reusable tire" means a tire that has been previously used on a vehicle, not currently mounted on a vehicle, but can be legally placed into service for vehicle use in Oklahoma.
"Semitrailer" means every vehicle with or without motive power, other than a pole trailer, designed for carrying persons or property and for being drawn by a motor vehicle and so constructed that some part of its weight and that of its load rests upon or is carried by another vehicle. [47 O.S. § 1-162]
"Tire" means any solid or air-filled covering for vehicle wheels.
"Tire-derived fuel facility" or "TDF facility" means a facility that uses processed tires or whole used tires for energy or fuel recovery.
"Trailer" means every vehicle with or without motive power, other than a pole trailer, designed for carrying persons or property and for being drawn by a motor vehicle and so constructed that no part of its weight rests upon the towing vehicle, provided however, the definition of trailer herein shall not include implements of husbandry as defined in Section 47-1-125 of Title 47. [47 O.S. § 1-180]
"Used tire" means an unprocessed whole tire or tire part that can no longer be used for its originally intended purpose but can be beneficially reused as approved by the DEQ. Any used tire collected in accordance with the requirements of the Oklahoma Used Tire Recycling Act is not considered to be discarded. A tire that can be used, reused or legally modified to be reused for its original intended purpose shall not be a used tire.
"Used tire facility" means any place which is permitted as a solid waste disposal site, in accordance with the Oklahoma Solid Waste Management Act, at which used tires are processed.
"Used tire processing" means altering the form of whole used tires by shredding, chipping, or other method approved by the department, except baling. [27A O.S. §2-11-401.1]
"Vehicle" means any device in, upon or by which any person or property is or may be transported or drawn upon a highway, excepting devices used exclusively upon stationary rails or tracks. [47 O.S. § 1-186]. The term "vehicle" does not include:
(A) Implements of husbandry which means every device, whether it is self-propelled, designed and adapted so as to be used exclusively for agricultural, horticultural or livestock-raising operations or for lifting or carrying an implement of husbandry and, in either case, not subject to registration if operated upon the highways. [47 O.S. § 1-125]. Examples of implements of husbandry are described in 47 O.S. § 1-125(1)-(3).
(B) Electric personal assistive mobility devices, which means a self-balancing, two nontandem-wheeled device, designed to transport only one person, having an electric propulsion system with an average of seven hundred fifty (750) watts (1 h.p.), and a maximum speed of less than twenty (20) miles per hour on a paved level surface when powered solely by such a propulsion system while ridden by an operator who weighs one hundred seventy (170) pounds. [47 O.S. § 1-114A]
(C) Motorized wheelchairs which means any self-propelled vehicle designed for and used by a person with a disability that is incapable of a speed in excess of eight (8) miles per hour. [47 O.S. § 1-136.3]
Okla. Admin. Code § 710:95-5-2