To be kept clean. The owner or occupant of any lot or parcel in front
of which a sidewalk has been constructed shall clean off and remove
from such sidewalk all snow, ice, mud, leaves, rubbish, or other debris
which has accumulated thereon within 24 hours after such snow, etc.,
has been deposited thereon. If it is impossible or impractical to
remove ice from the walk, such owner of occupant shall sprinkle the
sidewalk with sand, cinders, ashes, salt or other material continuously
until removed so that such sidewalk will not be slippery or dangerous
to pedestrians. If the owner or occupant fails to comply with this
subsection, the Building Inspector shall cause such removal or treatment
as required in this subsection. The cost thereof shall become a special
tax or charge against the property, to be collected in the manner
provided in this section.