(a) The owner, occupant, or person having the care of any building or lot of land bordering on any street with graded or paved sidewalks, within the first 4 hours after daylight, following or during a fall of snow, shall cause the snow to be removed from the walk. This provision shall include snow or ice falling from any building.
(b) Whenever the sidewalk or any part thereof shall become encumbered with ice, the owner, occupant, or person in control, within the first 4 hours after daylight, following or during its formation, shall cause the sidewalk to be made safe by removing the ice or sprinkling the same with sand or other suitable substance.
(1980 Code 97.19)