No person shall encumber any street or sidewalk or, being the owner, occupant or person having care of any building or lot of land bordering on any street or sidewalk, permit the same to be encumbered with barrels, boxes, cans, wrecked cars, articles or substances of any kind, so as to interfere with the free and unobstructed use thereof, without a permit to do so.
(1975 Code Sec. 17-3)