For purposes of this part, the term:
(1) Class I electric assisted bicycle means an electric assisted bicycle equipped with a motor that provides assistance only when the rider is pedaling and that ceases to provide assistance when the device reaches a speed of 20 miles per hour.
(2) Class II electric assisted bicycle means an electric assisted bicycle equipped with a motor that may be used exclusively to propel the vehicle but is not capable of reaching a speed of 20 miles per hour.
(3) Class III electric assisted bicycle means an electric assisted bicycle equipped with a motor that provides assistance only when the rider is pedaling and that ceases to provide assistance when the device reaches a speed of 28 miles per hour.