Every property owner of improved property shall, on or before October 1, 1966, display in a conspicuous place on the property the number assigned, which shall be of a type approved by the City Council. Upon notice by the City Clerk to any owner or occupant of any house or building, the owner or occupant, within ten days after the notice shall have been given assigning the house or building a number or numbers, shall cause the house or building to be numbered as required, at the expense of the owners or occupants.
(`90 Code, § 18-68)