Okla. Stat. tit. 47, § 1-114A
"Electric personal assistive mobility device" 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.
Laws 2002, SB 1473, c. 58, § 1, emerg. eff. April 11, 2002.