Vehicles operated by glass companies are permitted to stand by locations where parking is otherwise prohibited, including truck loading zones, while installing large plate glass windows or doors. These vehicles are not permitted to stand at locations where stopping is prohibited or where they will obstruct the free movement of vehicles or pedestrians unless they have a permit to do so from the Director of Transportation. These permits shall be issued by the Director and shall be renewable yearly. No more than 1 permit may be issued to each glass company. City Code, 1976/83, art. 31, §70A Ord. 77-224 Ord. 15-435