Okla. Stat. tit. 21, § 21-917: Motor vehicle defined - Antique, classic, or special

interest automobile defined.

A. The term "motor vehicle" as used in this act shall mean

every vehicle intended primarily for use and operation on the public

highways, which is self-propelled; and every vehicle intended

primarily for operation on the public highways which is not driven

or propelled by its own power, but which is designed either to be

attached to or become a part of a self-propelled vehicle; but not

including farm tractors and other machines and tools used in the

production, harvesting and care of farm products.

B. The term "antique, classic, or special interest automobile"

as used in Section 918 of this title shall mean a motor vehicle

which only travels on the highways of this state primarily for

historical or exhibition purposes.