(A)   It shall be unlawful to deposit on any public sidewalk any material which may be harmful to the pavement thereof, or any waste material, or any glass or other article which might cause injury to persons, animals, or property.
   (B)   Merchandise or other articles may be deposited on sidewalks preparatory to delivery, provided that the usable width of the sidewalk is not thereby reduced to less than 4 feet; and provided that no article shall remain on the walk for more than 1/2 hour.
Penalty, see § 94.999