(a) It shall be unlawful for any person to permit any cellar door, cellarway or grating to any vault in any public way in the urban county, belonging to premises owned or occupied by him, to be in an insecure condition so as to endanger passersby.
(b) It shall be unlawful for any person to place or maintain on any sidewalk, street or alley any cellar door, cellarway or steps leading into any cellar door or cellarway that is otherwise than level with the adjacent pavement or that extends more than four (4) feet from the line of the adjoining lot.
(c) It shall be unlawful for any person to permit any grating, cellar door, areaway or passageway in any sidewalk to remain open except when in actual use as provided in subsection (d) of this section.
(d) It shall be unlawful for any person to prevent the free and unobstructed use by pedestrians of the entire sidewalk from the property line abutting on such sidewalk to the curb, except for the time such openings in the sidewalk are being actually used for ingress or egress from the cellar or basement with which such openings communicate or connect; and when such actual use ceases, the grating or cellar door or areaway or passageway in the sidewalk shall be closed on a level with the sidewalk, and securely fastened, so that pedestrians may safely and without obstruction use the full width of the sidewalk, including the space therein consumed by such grating, cellar door, areaway or passageway.
(e) All sidewalk gratings shall be protected on the under side with a quarter-inch wire mesh screen.