6.3.3.1. The locking device may be:
(a) A child safety lock system; or
(b) A lock release/engagement device located within the interior of the vehicle and readily accessible; or
(c) A system which renders the interior door handle or other interior latch release control for this door inoperative when the speed of the vehicle is greater than or equal to 4 km/h; or
(d) Any combination of items (a), (b) or (c) above.
a1c0