Whenever a sidewalk or portion thereof shall become encumbered with snow, ice, mud, obstruction or debris, it shall be the duty of the owner, occupant or person in charge of the property abutting upon such sidewalk to remove the same during daylight or before 9:00 a.m. after the falling of snow during darkness. In complying with the foregoing requirements, no person shall use any pick, axe or other sharp tool or implement which could cause damage to the sidewalk.
('73 Code, § 21-1) Penalty, see § 94.99