There shall be three (3) classes of electric bicycles:
(1) Class 1: Bicycle equipped with an electric motor that provides assistance only when the rider is pedaling, and that ceases to provide assistance when the electric bicycle reaches twenty miles per hour (20 m.p.h.).
(2) Class 2: Bicycle equipped with a throttle-actuated electric motor that ceases to provide assistance when the electric bicycle reaches twenty miles per hour (20 m.p.h.).
(3) Class 3: Bicycle equipped with an electric motor that provides assistance only when the rider is pedaling, and that ceases to provide assistance when the electric bicycle reaches twenty-eight miles per hour (28 m.p.h.).