(A) Whenever a commercial loading zone is designated and marked by traffic-control devices in accordance with division (B) below, no person may park any vehicle there or permit it to stand in the zone for any purpose other than the expeditious loading or pickup of materials and goods, or unloading and delivery, and then only for a period not to exceed 30 minutes.
(B) The locations specified as set forth by the town from time to time are declared to be commercial loading zones, and the Administrator shall install appropriate traffic-control devices to give clear notice of the limitations set forth in division (A) above.