15. Every handgrip referred to in section 14 shall:
(a) be attached to a load-carrying part of the snowmobile;
(b) be capable of withstanding, without failure or separation from the vehicle, a force equal to the curb weight of the snowmobile applied from any direction; and
(c) in the case of a handgrip not rigidly attached to the snowmobile, be attached so that, if it is released from any position other than the position in which it is normally used, it automatically returns to the position in which it is normally used.