Okla. Stat. tit. 47, § 1-134
Every vehicle which is self-propelled and every vehicle which is propelled by electric power obtained from overhead trolley wires, but not operated upon rails; provided, however, the definition of "motor vehicle" herein shall not include implements of husbandry as defined in Section 47-1-125 of this chapter.
Laws 1961, HB 556, p. 318, § 1-134; Amended by Laws 1978, c. 304, § 1; Amended by Laws 1981, HB 1039, c. 103, § 1, eff. October 1, 1981.