If any property owner, occupant or agent of such property shall fail or refuse to clean off the sidewalk abutting or adjacent to the property owned or occupied by him within seventy two (72) hours after notice served on him by any police officer, sanitary officer or any other agent of the city, the property owner or occupant or agent so failing or refusing after notice so to do, to clean off such sidewalk, shall be deemed guilty of an offense. (1988 Code § 14-111)