The operator of a bicycle or a motor scooter may ride the bicycle or motor scooter only: On or astride a permanent and regular seat securely attached to it; or For an electric low speed scooter, by standing on a platform designed to carry the operator. A bicycle may not carry any passenger unless it is designed for and equipped with a seat securely attached to it for each passenger. A motor scooter may not carry any passenger unless it is designed for and equipped with a seat securely attached to it and footrests for each passenger.